(19)
(11)EP 2 684 989 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
26.06.2019 Bulletin 2019/26

(21)Application number: 12755399.8

(22)Date of filing:  09.02.2012
(51)International Patent Classification (IPC): 
D06B 23/16(2006.01)
D02J 1/22(2006.01)
D06B 3/04(2006.01)
D01F 9/32(2006.01)
D02J 13/00(2006.01)
D06B 23/18(2006.01)
(86)International application number:
PCT/JP2012/053008
(87)International publication number:
WO 2012/120962 (13.09.2012 Gazette  2012/37)

(54)

APPARATUS FOR PRESSURE STEAM TREATMENT OF A FIBER BUNDLE AND PRODUCTION METHOD OF CARBON FIBER PRECURSOR FIBER BUNDLE

VORRICHTUNG ZUR DRUCKDAMPFBEHANDLUNG VON FASERBÜNDEL UND HERSTELLUNGSVERFAHREN FÜR FASERBÜNDEL VON KOHLENFASER

APPAREIL DE TRAITEMENT PAR VAPEUR SOUS PRESSION D'UN FAISCEAU DES FIBRES ET PROCÉDÉ DE PRODUCTION D'UN FAISCEAU DES FIBRES PRÉCURSEUR DE CARBONE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 09.03.2011 JP 2011052025

(43)Date of publication of application:
15.01.2014 Bulletin 2014/03

(73)Proprietor: Mitsubishi Chemical Corporation
Tokyo 100-8251 (JP)

(72)Inventors:
  • MIZUTORI, Yukihiro
    Otake-shi Hiroshima 739-0693 (JP)
  • KAWAMURA, Atsushi
    Otake-shi Hiroshima 739-0693 (JP)
  • INADA, Hiromasa
    Otake-shi Hiroshima 739-0693 (JP)

(74)Representative: Hoffmann Eitle 
Patent- und Rechtsanwälte PartmbB Arabellastraße 30
81925 München
81925 München (DE)


(56)References cited: : 
JP-A- 2001 140 161
JP-A- 2009 256 820
JP-Y1- 49 043 172
JP-A- 2009 256 820
JP-Y1- S4 943 172
US-A- 2 228 272
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description


    [0001] The invention relates to a pressure steam treatment apparatus fiber bundle, and a producing method of the fiber bundle.

    [0002] In a producing of a carbon fiber or the like, as a precursor, for example, a fiber bundle made of a polyacrylonitrile polymer is employed as a fiber, and the fiber bundle is required to be excellent in a strength and a degree of orientation. Such a fiber bundle can be obtained, for example, by fiber spinning a fiber spinning solution including a polyacrylonitrile polymer so as to form a coagulated fiber, obtaining a densified fiber bundle by drawing in a bath and drying the coagulated fiber, and thereafter carrying out a secondary drawing treatment of the fiber bundle under a pressure steam atmosphere.

    [0003] In the treatment of the fiber bundle under the pressure steam atmosphere, there is used a treatment apparatus which makes the fiber bundle travel inside of the apparatus and supplies a pressure steam with respect to the fiber bundle. In such a treatment apparatus, if the pressure steam supplied to the inside of the apparatus leaks out in large quantities to the outside of the apparatus from an inlet and an outlet of the fiber bundle, a pressure, a temperature, a humidity and the like in the inside of the apparatus becomes unstable, and there has been a case that a fuzz, a broken thread or the like is generated in the fiber bundle. Further, a lot of pressure steam is necessary for suppressing an influence of the leakage of the pressure steam to the outside of the apparatus, and an increase of an energy cost has been caused.

    [0004] As a treatment apparatus which suppresses the leakage of the pressure steam from the inside of the apparatus, for example, Japanese Patent Application Laid-Open No. 2001-140161 (Patent Document 1), discloses a pressure steam treatment apparatus which is provided with a pressure steam treatment chamber which treats a fiber bundle traveling in a fixed direction by a pressure steam, and two labyrinth sealing chambers which extend from front and rear sides of the pressure steam treatment chamber. The labyrinth sealing chamber is provided with labyrinth nozzles in multiple stages in parallel along a fiber bundle travel path, the labyrinth nozzles being configured from plate pieces extending perpendicularly toward the fiber bundle from inner wall surfaces of a top plate and a bottom plate which are opposed to each other. An energy is consumed at a time of passing through each of spaces (expansion chambers) between the labyrinth nozzles, whereby an amount of leakage of the pressure steam is lowered. Patent Document 1 is considered to disclose the feature combination of the preamble of Claim 1 below.

    [0005] According to the Patent Document 1, the first and second labyrinth sealing chambers are arranged in the front and rear sides of the pressure steam treatment chamber, and a plurality of fiber bundles traveling in parallel like a sheet along the fiber bundle travel path are treated under the pressure steam atmosphere in a lump. A value of a ratio (L/P) between an extension length L of the labyrinth nozzle from the inner wall surfaces of the top plate and the bottom plate, and a pitch P between the front and rear nozzles is between 0.3 and 1.2, and a number of the stages of the labyrinth nozzles is set to 80 to 120 in both of a first and a second labyrinth sealing chambers in the front and rear sides. Further, a filling factor F of the fiber bundle calculated by the following expression in the fiber bundle travel path within the labyrinth sealing chamber is set to 0.5 to 10%.

    Here, K: fiber bundle fineness (tex)

    ρ: fiber bundle density (g/cm3)

    A: opening area of the fiber bundle travel path (cm2).



    [0006] Since a magnitude of an expansion chamber formed between the front and rear nozzles comes to a preferable one by setting the value of L/P to the range, and it is possible to extremely consume the energy by repeating generation and elimination of a small eddy current of a rotation within the expansion chamber, a decompression effectively makes progress. It is possible to effectively suppress a team leakage amount in cooperation with the number of the forming stages of the labyrinth nozzles such as 80 to 120 stages, and it is possible to effectively prevent a damage of the fiber bundle and the fuzz.

    [0007] According to the pressure steam treatment apparatus described in the Patent Document 1, a plurality of fiber bundles travel in parallel along the fiber bundle travel path, however, since each of the adjacent fiber bundles at this time travels simply in a parallel state, the adjacent fiber bundles interfere with each other if the filling factor of the fiber bundle passed through the treatment apparatus goes beyond 10%, and a combined filament tends to be generated.

    [0008] Further, in this kind of pressure steam treatment apparatus according to the prior art, when a broken thread is generated in the inside of the pressure steam treatment apparatus in one spindle of a plurality of fiber bundles, the broken fiber bundle is left in the labyrinth sealing chamber, and is disturbed by the steam so as to be confounded with the adjacent fiber bundle, and the broken thread is induced, thereby causing a reduction of a yield ratio.

    [0009] Further, the high pressure steam introduced from the pressure steam treatment chamber in the center flows into and fills inside of the pressure steam treatment chamber and the first and second labyrinth sealing chambers which are arranged in the front and rear sides. At this time, the pressure steam does not flow in a determined direction, and there is a high possibility that it tends to flow in such a direction as to confound the adjacent fiber bundles. As a result, the broken yarn as mentioned above is further contributed, and there is accordingly a high risk that it becomes hard to uniformly and stably burn in the carbon forming step thereafter.

    [0010] United States patent publication no. US 2,228,272 describes treatment of filaments or threads, but does not disclose anything that could correspond to labyrinth nozzles configured from plate pieces extending perpendicularly towards fiber bundles from upper and lower inner wall surfaces of a labyrinth chamber, or anything that could correspond to expansion chambers formed between front and rear such labyrinth nozzles, or anything that could correspond to partition plates provided is parallel to the fiber bundles and along between adjacent fiber bundles in a fiber bundle parallel direction in the labyrinth chamber.

    [0011] Japanese patent application publication no. JP 49-43172 describes a single labyrinth sealing apparatus with at least two yarn grooves used in a steam treatment tank for continuously processing monofilaments. However, this publication does not disclose anything that could correspond to labyrinth nozzles or expansion chambers.

    [0012] It is desirable to provide a pressure steam treatment apparatus of a carbon fiber precursor fiber bundle which can suppress an influence of a leakage of a pressure steam to the outside of the apparatus so as to hold down a pressure steam supply amount to the minimum, simultaneously reduce a broken yarn, improve a yield ratio, and have a high productivity.

    [0013] The invention provides, in one aspect, a pressure steam treatment apparatus, comprising: a pressure steam treatment chamber configured to treat, by pressurized steam, a fiber bundle (Y) traveling in a fixed direction; two labyrinth sealing chambers extending from front and rear sides of the pressure steam treatment chamber; labyrinth nozzles provided in the labyrinth sealing chambers and arranged in multiple stages in parallel along one of a plurality of fiber bundle travel paths, the labyrinth nozzles being configured from plate pieces extending perpendicularly towards the fiber bundles from upper and lower inner wall surfaces of the labyrinth chamber; expansion chambers formed between the front and rear labyrinth nozzles; and means for treating a plurality of the fiber bundles traveling in parallel under a pressure steam atmosphere in a lump, characterized in that the labyrinth sealing chambers are continuously provided in an inlet and an outlet of the fiber bundle of the pressure steam treatment chamber respectively, and partition plates are provided in parallel to the fiber bundle and along between adjacent fiber bundles in the fiber bundle parallel direction in the labyrinth sealing chamber such that, in use of the apparatus, the fiber bundle travel paths in the labyrinth sealing chambers are comparted per each of the fiber bundles by the partition plate.

    [0014] The invention provides, in another aspect, a method of producing a carbon fiber precursor fiber bundle wherein a plurality of fiber-bundles are drawn in a lump by the pressure steam treatment apparatus according to the first-mentioned aspect.

    [0015] According to an embodiment of the invention, it is preferable that a plurality of partition plates are continuously provided in parallel to a fiber bundle per each of stages of the labyrinth nozzle and along between the adjacent fiber bundles in the fiber bundle parallel direction, in the labyrinth sealing chamber. Further, it is desirable to have the partition plates in parallel to the fiber bundle and along between the adjacent fiber bundles in the fiber bundle parallel direction, in the labyrinth sealing chamber.

    [0016] In an embodiment of the invention, the partition plate is provided between an optional labyrinth nozzle and an adjacent labyrinth nozzle. Further, a length of the partition plate in parallel to the fiber bundle may be between 55 and 95% of a height between a surface of an optional labyrinth nozzle and an opposed surface of an adjacent labyrinth nozzle. The partition plate may be provided in an inner surface of the upper or lower labyrinth plate. The height of the partition plate may be equal to or more than a sum of a height (L) of the labyrinth nozzle and an opening height (H) between the upper end lower labyrinth nozzles. Further, the partition plate may be provided in the inner surfaces of the upper and lower labyrinth plates.

    [0017] In an embodiment of the invention, the partition plates provided in the inner surfaces of the upper and lower labyrinth plates are at the opposed positions, and a height of one of the partition plates provided in the upper and lower labyrinth plates is equal to or more than a sum of the height of the upper or lower labyrinth nozzle and the opening height between the upper and lower labyrinth nozzles. Further, the partition plates provided in the inner surfaces of the upper and lower labyrinth plates are at position where not interfering with each other between the same fiber bundles, and the sum of the heights of the partition plates provided in the inner surfaces of the upper and lower labyrinth plates may be made equal to or more than the height from the inner surface of the upper labyrinth plate to the inner surface of the lower labyrinth plate.

    [0018] In an embodiment of the invention, and on the basis of a steam rectifying effect achieved by dividing the fiber bundle travel path of the labyrinth sealing chamber into several paths in parallel to the fiber bundle and orthogonal to the fiber bundle parallel direction, fiber bundle travel stability is improved in the inside of the pressure steam treatment apparatus, and contact and confounding between the adjacent fiber bundles can be considerably reduced. A test which comparts the fiber bundle travel path by a pin guide has been carried out. However, since a fuzz piles up between the pin guide and the labyrinth nozzle, it is necessary to frequently carry out a removing work to remove the fuzz, and since an induced breakage is successively generated, a step stability can not be secured, and it has been found that it was difficult to put it to practical use. Further, a diameter of the pin guide has been tried to be thicker in order to reduce the generation of the fuzz pile, however, it has been indispensable to make the fiber bundle travel path narrower, and a productivity is lowered, so that it can not be put to practical use.

    [0019] In an embodiment of the invention, it is known that if the partition plate is used for a dividing means, the induced breakage can be effectively prevented in the inside of the pressure steam treatment apparatus. As a result, not only can a fiber bundle having a reduced fuzz and having a high quality be obtained, but also travel stability of the fiber bundle is maintained, so that a yield ratio is significantly improved. The arranged position and the magnitude of the partition plate with respect to the labyrinth nozzle or the labyrinth plate are various, as mentioned above.

    [0020] In order that the invention will be more readily understood, embodiments thereof and background examples will now be described, given by way of example only, with reference to the drawings, and in which:-

    Fig. 1 is an enlarged partial vertical cross sectional view showing an example of a fiber bundle travel path of a labyrinth sealing chamber in pressure steam apparatus according to an embodiment, "Embodiment 1", of the invention;

    Fig. 2 is an enlarged partial perspective view which schematically views inside of the labyrinth sealing chamber from the above of the fiber bundle travel path;

    Fig. 3 is a transverse cross sectional view showing an example of the fiber bundle travel path of the labyrinth sealing chamber;

    Fig. 4 is a vertical cross sectional view schematically showing an example of arrangement of a labyrinth nozzle and a partition plate according to an embodiment of the invention;

    Fig. 5 is a cross sectional view showing an outline of an internal structure of the labyrinth sealing chamber shown in Fig. 4;

    Fig. 6 is a cross sectional view showing another example of the internal structure of the labyrinth sealing chamber;

    Fig. 7 is a cross sectional view showing further another example of the internal structure of the labyrinth sealing chamber;

    Fig. 8 is a transverse cross sectional view showing a fiber bundle travel path of a labyrinth sealing chamber according to a comparative example, "Comparative Example 1";

    Fig. 9 is a transverse cross sectional view showing a fiber bundle travel path of a labyrinth sealing chamber according to a comparative example, "Comparative Example 2";

    Fig. 10 is a vertical cross sectional view showing an outline structure of a pressure steam treatment apparatus according to a background example;

    Fig. 11 is a partial transverse cross sectional view showing an example of a fiber bundle travel path of a labyrinth sealing chamber according to a background example; and

    Fig. 12 is a vertical cross sectional view showing an example of the fiber bundle travel path of a labyrinth sealing chamber according to a background example.



    [0021] An embodiment of the invention will be particularly described below with reference to the accompanying drawings. Before describing the embodiment of the invention, an outline structure will be described by exemplifying a conventional typical pressure steam treatment apparatus shown in Figs. 10 to 12 and disclosed in the Patent Document 1, with reference to the drawings. In the embodiment of the invention, the conventional structure shown in Figs. 10 to 12 are provided basically, however, the basic structure is not limited to the exemplified structure. Taking these points into consideration, the same reference numerals are attached to members which correspond to the members shown in Figs. 10 to 12, in reference numerals in the drawings showing the embodiment of the invention described below.

    [0022] A pressure steam treatment apparatus 1 shown in Figs. 10 to 12 is provided with a pressure steam treatment chamber 2 and labyrinth sealing chambers 3 which are respectively arranged in an inlet and an outlet of a fiber bundle, and a plurality of fiber bundles Y are introduced into the pressure steam treatment apparatus 1 from a fiber bundle inlet 4 which is formed in a front wall portion of the apparatus 1, travel a fiber bundle travel path 5 which extends over a whole length of the apparatus 1 in parallel like a sheet in a horizontal direction, and are derived from a fiber bundle outlet 6 which is formed in a rear wall portion of the apparatus 1.

    [0023] As a material of a member which constructs the pressure steam treatment apparatus 1, any structure material can be applied as long as the material has a sufficient mechanical strength for carrying out a seal for preventing a leakage of a steam, and is not particularly limited. For example, as a material of a portion which may come into contact with the fiber bundle in an inner surface of the treatment apparatus, there is employed a material obtained by applying a hard chrome plating treatment to a stainless steel or a steel material in such a manner that it is possible to suppress a damage applied to the fiber bundle in the case of being contact as much as possible, as well as to have a corrosion resistance.

    [0024] The pressure steam treatment chamber 2 has pressure chambers 2a in upper and lower sides while holding the fiber bundle travel path 5 between them, as shown in Fig. 10. A wall portion facing to the fiber bundle travel path 5 in the pressure chamber 2a is configured from a porous plate 2b, and the steam supplied to the pressure chamber 2a from a steam introduction port 2c is pressurized so as to blow like a shower from the porous plate 2b toward the traveling fiber bundle Y.

    [0025] The labyrinth sealing chamber 3 is configured from labyrinth nozzles 3a in a multiple stages in a longitudinal direction of the fiber bundle, as shown in Figs. 10 and 11. Fig. 11 shows a part of a cross section in the fiber bundle longitudinal direction of the labyrinth sealing chamber 3 in an enlarged manner, and Fig. 12 is a vertical cross sectional view of the labyrinth nozzle 3a.

    [0026] The labyrinth nozzles 3a extend vertically toward the travel fiber bundle Y from all the inner wall surfaces in upper and lower and right and left of the labyrinth sealing chamber 3, and are arranged in a multiple stages between 80 stages and 120 stages in a longitudinal direction of the fiber bundle Y, and an expansion chamber 3c is formed between the labyrinth nozzles 3a in the back and forth in the fiber bundle longitudinal direction. An energy is consumed at a time of passing through each of the spaces (the expansion chambers) 3c between the labyrinth nozzles 3a, whereby a leaking amount of a pressure steam is lowered.

    [0027] The labyrinth nozzle 3a is configured from a tabular plate piece having a uniform thickness, and a slit-like opening 3b extending in a horizontal direction is formed in the center in a height direction, as shown in Fig. 12. A value of a ratio (L/P) of an extending length L from inner wall surfaces of upper and lower labyrinth plates 3d of the labyrinth nozzle 3a and a pitch P between the front and rear nozzles is set to come to 0.3 to 1.2. Further, a ratio H/W of a height H with respect to a lateral width W of the slit-like opening 3b is set to 1/900 to 1/100.

    [0028] No other member is provided in the inside of the opening 3b, and is open continuously in a back and forth direction of the labyrinth sealing chamber 3, as show in Fig. 12, and a space portion which is formed by the opening 3b and has a slit-like cross section constructs a fiber bundle travel path 5 in the labyrinth sealing chamber 3.

    [0029] An embodiment of the invention is characterized in that a structure of a fiber bundle travel path 5' of the labyrinth sealing chamber 3 is different from the conventional fiber bundle travel path 5. In other words, according to an embodiment of the invention, as shown in Figs. 1 to 3, a plurality of partition plates 3e are arranged in parallel to the fiber bundle travel path 5', between a plurality of fiber bundles Y traveling in parallel to the fiber bundle travel path 5' having the slit-like cross section, and in the fiber bundle travel path 5' between the upper and lower labyrinth nozzles 3a. As a result, the conventional fiber bundle travel path 5 is divided in the fiber bundle parallel direction by the partition plate 3e per each of the fiber bundles Y, and one fiber bundle Y travels on each of the fiber bundle travel paths 5'.

    [0030] The partition plate 3e is arranged over a whole length of the upper end lower inner wall surfaces in a space (an expansion chamber 3c') between the labyrinth nozzles 3a. In the present embodiment, the partition plate 3e configured from the flat plate piece which is independent from the labyrinth nozzle 3a constructing the labyrinth sealing chamber 3 and the upper and lower labyrinth plates 3d is separately attached, however, it may be integrally formed directly in the upper and lower labyrinth plates 3d, for example, similar to the labyrinth nozzle 3a, or may be integrally formed directly in the labyrinth nozzle 3a. As a material of the partition plate 3e, there is used a plate material obtained by applying a hard chrome plating treatment to a stainless steel, a titanium, a titanium alloy or a steel material.

    [0031] In the present embodiment, as shown in Figs. 1 and 2, a slight gap is provided between the partition plate 3e and the labyrinth nozzle 3a. The gap is expected to serve as a steam flow passage for uniformizing a steam pressure inside of each of the expansion chambers 3c' which is surrounded by the adjacent labyrinth nozzles 3a and the partition plate 3e.

    [0032] In order to draw the fiber bundle under a pressure steam atmosphere by using the pressure steam treatment apparatus 1, first of all, a thread is passed through the apparatus 1. In this case, in the pressure steam treatment apparatus disclosed in the Patent Document 1, in order to improve a thread passing performance, it is divided into two pieces so as to be divided up and down by a plane including the fiber bundle travel path 5. The same structure can be employed in embodiments of the invention. According to this structure, the thread passing performance is improved particularly in the case that a lot of spindles are treated in a lump, and it is possible to carry out the thread passing work easily and for a short time.

    [0033] Further, in embodiments of the invention, in the same manner as the pressure steam treatment apparatus disclosed in the Patent Document 1, it is preferable to set an introducing amount of the fiber bundle to the pressure steam treatment apparatus 1 in such a range that a filling factor F is between 0.5% and 10%. The filling factor F is a value which is determined by the following expression F = {K/ (ρ × 105)}/A, that is, a rate occupied by a fiber bundle cross sectional area with respect to an opening area of the opening 3b in the labyrinth sealing chamber 3. In this case, K is a fiber bundle fineness (tex), ρ is a fiber bundle density (g/cm3), and A is an opening area (cm2) of the fiber bundle travel path.

    [0034] A drawing treatment is applied to the fiber bundle under the pressure steam atmosphere by supplying the steam to the pressure steam treatment chamber 2 from the steam introduction port. At this time, the steam in the inside of the apparatus is going to leak out to the outside from the fiber bundle inlet 4 and the fiber bundle outlet 6. In embodiments of the invention, in the same manner as the pressure steam treatment apparatus disclosed in the Patent Document 1, the labyrinth sealing chamber 3 is arranged in each of the inlet and the outlet of the fiber bundle in the pressure steam treatment chamber 2, and if the labyrinth nozzles 3a are formed in a multiple stages between 80 stages and 120 stages in the sealing chamber 3, and the ratio (L/P) of the extending length L of the labyrinth nozzle 3a, that is, the length L to the opening 3b, and the pitch P between the front and rear nozzles is set to 0.3 to 1.2, it is possible to further effectively prevent the leakage of the steam.

    [0035] The labyrinth nozzle 3a can effectively reduce the steam leakage amount by setting the forming stage number to 80 stage to 120 stage. In the case that the number of the labyrinth nozzles is less than 80 stages, the sealing performance becomes insufficient, and even if the number of the labyrinth nozzles is made equal to or more than 120 stages, the effect of suppressing the steam leakage does not change.

    [0036] Further, the labyrinth nozzle 3a can effectively suppress the leakage of the steam by setting the value of the ratio (L/P) of the extending length L from the inner wall surfaces of the upper end lower labyrinth plates 3d and the pitch P between the adjacent nozzles to be in a range between 0.3 and 1.2. It is possible to effectively suppress the steam leakage amount by adjusting the value of the L/P as mentioned above so as to optimize a dimension and a cross sectional shape of the expansion chamber 3c' , and it is possible to effectively prevent a damage of the fiber bundle and a fuzz.

    [0037] A ratio H/W of a height of the vertical opening with respect to a lateral width W of the opening 3b is set to 1/900 to 1/100 in the same manner as the pressure steam treatment apparatus described in the Patent Document 1. If the ratio H/W is equal to or less than 1/900, a generation of the damage of the fiber bundle and the fuzz can not be suppressed, and if the ratio H/W is equal to or more than 1/100, it is difficult to keep the fiber bundle flat and suppress the steam leaking amount at the same time.

    [0038] Further, it is possible to prevent an interference between the fiber bundles traveling in adjacent in the multiple spindle treatment and a damage and a combined filament accompanying with it, by suppressing the filling factor F in conjunction with setting the value of the ratio H/W of the vertical opening height H with respect to the width W of the slit-like opening 3b to 1/900 to 1/100. It is preferable that the filling factor F is set to 0.5% to 10%. If the filling factor F is less than 0.5% or if the number of the labyrinth nozzles 3a is less than 80 stages, the leakage amount of the steam is increased, and if the filling factor F goes beyond 10%, or the number of the labyrinth nozzles 3a goes beyond 120 stages, a contact between the fiber bundle and the labyrinth nozzle 3a can not be disregarded, and the combined filament between the adjacent fiber bundles or the constructing fibers tends to be generated.

    [0039] Further, since the present embodiment employs the labyrinth nozzle 3a in which the shape of the opening 3b constructing the fiber bundle travel path 5' in the labyrinth sealing chamber 3 is the slit shape as shown in Fig. 4, and comparts the fiber bundle travel path 5' in the fiber bundle parallel direction by the partition plate 3e in accordance with the number of the fiber bundles, not only it is possible to maintain the fiber bundle Y in a flat state, but also each of the partition plates 3e serves as a rectifying plate, so that an amount and a pressure of the pressure steam acting on each of the fiber bundles Y are uniformized in cooperation with the existence of the gap between each of the nozzles 3a and the partition plate 3e, an intrusion and an arrival of the steam to the inside of the fiber bundle are promoted, and it is possible to uniformly heat and pressurize in a short time. Further, the existence of the partition plate 3e particularly prevents the contact and the confounding between the adjacent fiber bundles Y, and prevents the fuzz and the combined filament from being generated in the labyrinth sealing chamber 3 and further prevents an induced breakage from being generated by the confounding between the adjacent fiber bundles Y, a traveling stability of the fiber bundle Y is significantly improved, a yield ratio becomes high, and it is possible to obtain a high-quality fiber bundle which is excellent in a productivity and generates less fuzz.

    [0040] In the pressure steam treatment apparatus described in the Patent Document 1, in the case of using the pressure steam treatment apparatus in which the apparatus main body can be divided in the fiber bundle parallel direction in the flat surface including the fiber bundle travel path 5, it is preferable that the gap is provided between the labyrinth nozzle 3a and the partition plate 3e, as exemplified in Fig. 4, and it is preferable that a length in the fiber bundle longitudinal direction of the labyrinth nozzle 3a is between 55% and 95% of a height of a surface of an optional labyrinth nozzle 3a and an opposed surface of the adjacent labyrinth nozzle.

    [0041] By making the length in the fiber bundle longitudinal direction of the partition plate equal to or more than 55% of the height of the surface of the optional labyrinth nozzle 3a and the opposed surface of the adjacent labyrinth nozzle, it is possible to prevent the contact and the intertwining between the adjacent fiber bundles Y, prevent the fuzz and the combined filament from being generated in the labyrinth sealing chamber 3 and further prevent the induced breakage from being generated by the confounding between the adjacent fiber bundles Y, the travel stability of the fiber bundle Y becomes significantly improved, the yield ratio becomes high, and it is possible to obtain the high-quality fiber bundle which is excellent in the productivity and generates less fuzz. By making the length in the fiber bundle longitudinal direction of the partition plate equal to or less than 95% of the height of the surface of the optional labyrinth nozzle and the opposed surface of the adjacent labyrinth nozzle, it is possible to prevent the labyrinth nozzle in a side having no partition plate in the upper or lower labyrinth nozzles from coming into contact with the partition plate at a time of closing the pressure steam apparatus which is divided in the flat surface including the fiber bundle travel path 5, and the breakage between the labyrinth nozzle and the partition plate is not generated.

    [0042] The pressure steam treatment apparatus 1 according to the embodiment is structured so as to travel the fiber bundle in the horizontal direction, however, the traveling direction is not limited to the horizontal direction, but it is possible to construct a treatment apparatus of a type of traveling in a vertical direction. Further, there is shown the example in which the partition plate 3e is provided in each of the labyrinth sealing chambers 3 which are arranged respectively in the inlet and the outlet of the fiber bundle of the pressure steam treatment chamber 2, however, the partition plate 3e may be arranged only in the labyrinth sealing chamber 3 in either of the inlet or the outlet of the fiber bundle of the pressure steam treatment chamber 2. In this case, it is preferable to arrange the partition plate 3e in the labyrinth sealing chamber 3 at least in the inlet side of the fiber bundle.

    [0043] Further, in the embodiment, the labyrinth nozzle 3a is extended from all the inner wall surfaces in upper and lower and right and left of the labyrinth sealing chamber 3, and a whole periphery of the fiber bundle travel path 5 is surrounded by the labyrinth nozzle 3, however, the embodiment is not limited to the structure mentioned above. There is a case that the labyrinth nozzle 3a may be extended, for example, only from the upper and lower wall surfaces, not from all the surfaces of the inner wall surface, and in this case, the fiber bundle travel path 5' is surrounded by the labyrinth nozzle 3a which is extended vertically from the upper and lower labyrinth plates 3d and the right and left side wall surfaces of the labyrinth sealing chamber 3.

    [producing example 1]



    [0044] A fiber spinning solution is adjusted by resolving a polyacrylonitrile polymer obtained by copolymerizing an acrylonitrile (AN), a methyl acrilate (MA) and a methacrylic acid (MAA) at a mole ratio AN/MA/MAA = 96/2/2 in a dimethyl acetamide (DMAc) solution (a polymer concentration of 20 % by mass, a viscosity of 50 Pa·s, a temperature of 60°C), and the fiber spinning solution is discharged to a DMAc water solution at a concentration of 70 % by mass and a liquid solution of 35°C through a fiber spinning mouth piece having a hole number of 12000 so as to be water washed, is thereafter drawn to three times in a hot water bath, and is dried at 135°C, whereby a densified fiber bundle F is obtained.

    [0045] The invention will be explained more specifically with reference to embodiments and comparative examples. The embodiments and the comparative examples described below are only exemplifications, and the claimed invention is not limited to the following description.

    [0046] In the following embodiments and comparative examples, there is employed a pressure steam treatment apparatus 1 which is improved on the basis of the conventional pressure steam treatment apparatus shown in Figs. 10 and 11.

    (Embodiment 1)



    [0047] In the treatment apparatus 1 exemplified in Figs. 1 to 5, a lot of partition plates 3e are continuously provided in the front and rear labyrinth sealing chambers 3. In this treatment apparatus 1, a plurality of partition plates 3e are continuously provided in parallel to the fiber bundle and along between the adjacent fiber bundles in the fiber bundle parallel direction. At this time, a desired gap is provided between the side surface of the partition plate 3e and the opposed flat surface of the labyrinth nozzle 3a. In the present Embodiment 1, a thickness of the labyrinth nozzle 3a is set to t = 1 mm, a length of the expansion chamber between the labyrinth nozzles 3a is set to P2 = 21 mm, an extending length of the labyrinth nozzle 3a from the inner wall surfaces of the upper end lower labyrinth plates 3d is set to L = 5 mm, and an opening height is set to H = 2 mm, and the partition plate 3e is directly provided in a rising manner in the lower labyrinth plate 3d. A length in the fiber bundle longitudinal direction of the partition plate 3e is set to P1 = 19 mm, and a height of the partition plate is set to H1 = 10 mm. Accordingly, as shown in Fig. 4, a gap of 2 mm height is formed also between an upper end of the partition plate 3e which rises from the inner surface of the lower labyrinth plate 3d and the inner surface of the upper labyrinth plate 3d.

    [0048] The pressure steam treatment was carried out by introducing the fiber bundle Y obtained in the producing example 1 at three spindles from the fiber bundle inlet, using the treatment apparatus 1. The pressure of the pressure chamber was set to 300 kPa, and a drawing magnification of the fiber bundle Y by the pressure steam was set to three times. The fiber spinning was carried out for ten hours at the same time of starting the drawing treatment by the pressure steam. During the fiber spinning of the fiber bundle, it was possible to stably steam draw without any flopping in all the fiber bundles and without any generation of fuzz. After ten hours has passed from starting producing of the fiber bundle, a waste thread was wound around the fiber bundle Y traveling in the center among the fiber bundles Y traveling in the inlet side of the treatment apparatus 1, and the fiber bundle Y traveling in the center was forcibly cut in the treatment apparatus 1, however, as shown in Table 1, the adjacent two fiber bundles Y were not thereafter cut in an induced manner, and the steam drawing could be stably carried out.

    (Embodiments 2 to 4)



    [0049] The pressure steam treatment of the fiber bundle Y was carried out for ten hours using the same pressure steam treatment apparatus 1 as the Embodiment 1, except for changing the length P1 in the fiber bundle longitudinal direction of the partition plate 3e of the treatment apparatus 1 as shown in Table 1. Further, the waste thread was wound around the fiber bundle Y traveling in the center among the fiber bundles Y traveling in the inlet side of the treatment apparatus 1 after ten hours has passed from starting producing of the fiber bundle, and the fiber bundle Y traveling in the center was forcibly cut in the treatment apparatus 1. Table 1 shows results obtained by observing the state of the fuzz of the fiber bundle after the pressure steam drawing during the execution of the drawing by the pressure steam treatment apparatus 1, and estimating a generation frequency of the fuzz, and a generation condition of the induced cut of two adjacent fiber bundles Y after forcibly cutting the fiber bundle Y traveling in the center. In the same manner as the Embodiment 1, it was possible to stably carry out the steam drawing without the generation of the fuzz and the induced cut.

    (Embodiment 5)



    [0050] As exemplified in Fig. 6, the pressure steam treatment of the fiber bundle Y was carried out for ten hours using the same treatment apparatus as the treatment apparatus 1, except that the partition plates 3e having heights H1 and H2 were attached to the inner surfaces of the upper and lower labyrinth plates 3d. Further, the waste thread was wound around the fiber bundle Y traveling in the center among the fiber bundles Y traveling in the inlet side of the treatment apparatus after ten hours has passed from starting producing of the fiber bundle, and the fiber bundle Y traveling in the center was forcibly cut in the treatment apparatus 1. Table 1 shows results obtained by observing the state of the fuzz after the pressure steam drawing during the execution of the drawing by the pressure steam treatment apparatus 1, and estimating a generation frequency of the fuzz, and a generation condition of the induced cut of two adjacent fiber bundles Y after forcibly cutting the fiber bundle Y traveling in the center. As shown in Table 1, it was possible to stably carry out the steam drawing without the generation of the fuzz and the generation of the induced cut.

    (Embodiment 6)



    [0051] The pressure steam treatment of the fiber bundle Y was carried out for ten hours using the same treatment apparatus as the treatment apparatus 1 of the Embodiment 1, except that the upper and lower partition plates 3e having the different heights H1 and H2 and attached to the inner surfaces of the upper and lower labyrinth plates 3d were at positions not interfering with each other between the same adjacent fiber bundles, and a sum of H1 + H2 of the heights of the partition plates which were arranged alternately in the inner surfaces of the upper and lower labyrinth plates was equal to or more than a height from the inner surface of the upper labyrinth plate 3d to the inner surface of the lower labyrinth plate 3d.

    [0052] Further, the waste thread was wound around the fiber bundle Y traveling in the center among the fiber bundles Y traveling in the inlet side of the treatment apparatus 1 after ten hours has passed from starting producing of the fiber bundle, and the fiber bundle Y traveling in the center was forcibly cut in the treatment apparatus 1. Table 1 shows results obtained by observing the state of the fuzz after the pressure steam drawing during the execution of the drawing by the pressure steam treatment apparatus, and estimating a generation frequency of the fuzz, and a generation condition of the induced cut of two adjacent fiber bundles Y after forcibly cutting the fiber bundle Y traveling in the center. As shown in Table 1, it was possible to stably carry out the steam drawing without the generation of the fuzz and the generation of the induced cut.

    (Comparative Example 1)



    [0053] As exemplified in Fig. 8, the fiber spinning was carried out for ten hours after starting the drawing treatment by the pressure steam of the fiber bundle Y, using the same pressure steam treatment apparatus 1 as the Embodiment 1, except that the partition plate 3e of the treatment apparatus 1 was detached. It was possible to stably carry out the steam drawing without the generation of the fuzz and without any flopping in all the fiber bundles during the producing of the fiber bundle. The waste thread was wound around the fiber bundle Y traveling in the center among the fiber bundles Y traveling in the inlet side of the treatment apparatus 1 after ten hours has passed from starting producing of the fiber bundle, and the fiber bundle Y traveling in the center was forcibly cut in the treatment apparatus 1. As a result, two fiber bundles Y which were adjacent just after that were cut due to the induced cut. By checking out the position at which the induced cut was generated, it was found that the fuzz was not generated, however, the adjacent fiber bundles were confounded within the labyrinth sealing chamber 3 in the front side of the pressure steam treatment chamber, and the induced cut was generated, as shown in Table 1.

    (Comparative Example 2)



    [0054] As exemplified in Fig. 9, the pressure steam treatment on the fiber bundle Y was carried out for ten hours using the same pressure steam treatment apparatus as the treatment apparatus 1 of the Embodiment 1, except that a pin guide 3f having a diameter 6 mm was used in place of the partition plate 3e of the treatment apparatus 1. During the producing of the fiber bundle, the flopping was not generated in all the fiber bundles, however, the generation of the fuzz was found in the fiber bundle after the pressure steam treatment. The waste thread was wound around the fiber bundle Y traveling in the center among the fiber bundles Y traveling in the inlet side of the treatment apparatus 1 after ten hours has passed from starting the producing of the fiber bundle, and the fiber bundle Y traveling in the center was forcibly cut in the treatment apparatus 1. As a result, two fiber bundles Y which were adjacent just after that were cut due to the induced cut. By checking out the position at which the induced cut was generated, it was found that the adjacent fiber bundles were confounded within the labyrinth sealing chamber 3 in the front side of the pressure steam treatment chamber.
    [Table 1]
     Drawing numberLabyrinth nozzlePartition plateRatio of length (P2) of expansion chamber between labyrinth nozzles with respect to length (P1) in fiber bundle longitudinal direction of partition plate (P1/P2) [%]Pressure chamberFuzz generation condition of fiber bundle after steam drawingWith or without induced cut generation after cutting center spindle
    Lower labyrinth plate 3d sideUpper labyrinth plate 3d side
    Thickness t[mm]Length of expansion chamber P2[mm]Extending length L[mm]Opening Height H[mm]Fiber bundle longitudinal direction length P1[mm]Height H1[mm]Fiber bundle longitudinal direction length P3[mm]Height H2[mm]Pressure [kPa]Temperature [°C]Total length [mm]
    Embodiment 1 Fig. 3 1 21 5 2 19 10 - - 90 300 142 1000 No fuzz No induced cut
    Embodiment 2 Fig. 3 1 21 5 2 16 10 - - 76 300 142 1000 No fuzz No induced cut
    Embodiment 3 Fig. 3 2 20 5 2 16 10 - - 80 300 142 1000 No fuzz No induced cut
    Embodiment 4 Fig. 3 3 12 5 2 10 10 - - 83 300 142 1000 No fuzz No induced cut
    Embodiment 5 Fig. 6 1 21 5 2 19 7 19 3 90 300 142 1000 No fuzz No induced cut
    Embodiment 6 Fig. 7 1 21 5 2 19 7 19 7 90 300 142 1000 No fuzz No induced cut
    Comparative Example 1 Fig. 8 1 21 5 2 - - - - 0 300 142 1000 No fuzz Induced cut generation
    Comparative Example 2 Fig. 9 1 21 5 2 10 10 - - 48 300 142 1000 Fuzz generation Induced cut generation


    [0055] As mentioned above in detail, according to the pressure steam treatment apparatus of the fiber bundle of embodiments of the invention, since it is possible to prevent the interference between the adjacent fiber bundles, and it is possible to uniformly apply the pressure steam to each of the fiber bundles, by dividing the fiber bundle travel path in the fiber bundle parallel direction, the traveling performance of the fiber bundle is improved, the leaking amount of the steam can be suppressed to the minimum, it is possible to carry out a stable pressure steam treatment with respect to each of the fiber bundles, and the high-quality fiber bundle without any damage and any fuzz can be obtained.

    DESCRIPTION OF REFERENCE NUMERALS



    [0056] 
    1
    Pressure steam treatment apparatus
    2
    Pressure steam treatment chamber
    2a
    Pressure chamber
    2b
    Porous plate
    2c
    Steam introducing port
    3
    Labyrinth sealing chamber
    3a
    Labyrinth nozzle
    3b
    Opening
    3c, 3c'
    Expansion chamber
    3d
    Labyrinth plate
    3e
    Partition plate
    3f
    Pin guide
    4
    Fiber bundle inlet
    5, 5'
    Fiber bundle travel path
    6
    Fiber bundle outlet
    Y
    Fiber bundle
    H1, H2
    Height (of upper and lower partition plates)



    Claims

    1. A pressure steam treatment apparatus (1), comprising:

    a pressure steam treatment chamber (2) configured to treat, by pressurized steam, a fiber bundle (Y) traveling in a fixed direction;

    two labyrinth sealing chambers (3) extending from front and rear sides of the pressure steam treatment chamber (2);

    labyrinth nozzles (3a) provided in the labyrinth sealing chambers (3) and arranged in multiple stages in parallel along one of a plurality of fiber bundle travel paths (5'), the labyrinth nozzles (3a) being configured from plate pieces extending perpendicularly towards the fiber bundles (Y) from upper and lower inner wall surfaces of the labyrinth chamber (3) ;

    expansion chambers (3c') formed between the front and rear labyrinth nozzles (3a); and

    means for treating a plurality of the fiber bundles (Y) traveling in parallel under a pressure steam atmosphere in a lump,

    characterized in that the labyrinth sealing chambers (3) are continuously provided in an inlet (4) and an outlet (6) of the fiber bundle (Y) of the pressure steam treatment chamber (2) respectively, and partition plates (3e) are provided in parallel to the fiber bundle (Y) and along between adjacent fiber bundles (Y) in the fiber bundle parallel direction in the labyrinth sealing chamber (3) such that, in use of the apparatus (1), the fiber bundle travel paths (5') in the labyrinth sealing chambers (3) are comparted per each of the fiber bundles (Y) by the partition plate (3e).
     
    2. The pressure steam treatment apparatus (1) according to claim 1, wherein the partition plates (3e) are continuously provided in parallel to, and per each, fiber bundle, (Y) at least one of which partition plates (3e) is provided between one of the labyrinth nozzles (3a) and another, adjacent, labyrinth nozzle.
     
    3. The pressure steam treatment apparatus (1) according to claim 1 or claim 2, wherein a length (P1) of at least one of the partition plates (3e) in parallel to the fiber bundle (Y) is between 55 and 95% of a distance (P2) between a surface of the first-mentioned labyrinth nozzle (3a) and an opposed surface of an adjacent labyrinth nozzle (3a).
     
    4. The pressure steam treatment apparatus (1) according to any preceding claim, wherein the partition plates (3e) are provided in an inner surface of the upper, and/or a lower, labyrinth plate (3d) from which the nozzles extend.
     
    5. The pressure steam treatment apparatus according to claim 4, wherein a height of the partition plates is equal to, or more than, the sum of a height of the upper or lower labyrinth nozzle (3a) and an opening distance between the upper end lower labyrinth nozzles (3a).
     
    6. The pressure steam treatment apparatus according to claim 4, wherein the partition plates (3e) are provided in the inner surfaces of the upper and lower labyrinth plates (3d) and are at the opposed positions, and a height of one of the partition plates is equal to, or more than, the sum of the height of the upper or lower labyrinth nozzle (3a) and the opening distance between the upper and lower labyrinth nozzles (3a).
     
    7. The pressure steam treatment apparatus according to claim 4, wherein the partition plates (3e) are provided in the inner surfaces of the upper and lower labyrinth plates (3d) and are at position not interfering with each other between the same fiber bundles (Y), and the sum of the heights of the partition plates (3e) is made equal to, or more than, the distance from the inner surface of the upper labyrinth plate (3d) to the inner surface of the lower labyrinth plate (3d).
     
    8. The pressure steam treatment apparatus according to claim 2 or claim 3, wherein the partition plate (3e) is provided in the first-mentioned labyrinth nozzle (3a).
     
    9. The pressure steam treatment apparatus according to any preceding claim, wherein the partition plate (3e) is provided only in the labyrinth sealing chamber (3), which chamber is arranged in front of the pressure steam treatment chamber (2) .
     
    10. The pressure steam treatment apparatus according to any preceding claim, wherein the fiber bundle travel path (5') is divided only in the rear labyrinth sealing chamber (3) in the fiber bundle inlet side in the labyrinth sealing chamber (3).
     
    11. A method of producing a carbon fiber precursor fiber bundle wherein a plurality of fiber bundles (Y) are drawn in a lump by the pressure steam treatment apparatus (1) according to any preceding claim.
     


    Ansprüche

    1. Druckdampfbehandlungseinrichtung (1), umfassend:

    eine Druckdampfbehandlungskammer (2), welche konfiguriert ist, ein sich in einer feststehenden Richtung bewegendes Faserbündel (Y) durch unter Druck stehenden Dampf zu behandeln;

    zwei Labyrinthdichtungskammern (3), welche sich von Vorder- und Hinterseite der Druckdampfbehandlungskammer (2) erstrecken;

    Labyrinthdüsen (3a), welche in den Labyrinthdichtungskammern (3) bereitgestellt und in mehreren Phasen parallel entlang einer aus einer Vielzahl von Faserbündelbewegungsbahnen (5') angeordnet sind, wobei die Labyrinthdüsen (3a) von Plattenstücken konfiguriert sind, welche sich rechtwinkelig von oberen und unteren Seitenwänden der Labyrinthkammer (3) zu den Faserbündeln (Y) hin erstrecken;

    Expansionskammern (3c'), welche zwischen den vorderen und hinteren Labyrinthdüsen (3a) gebildet sind; und

    Mittel zum Behandeln einer Vielzahl der Faserbündel (Y), welche sich parallel unter einer Druckdampfatmosphäre in einem Klumpen bewegen,

    dadurch gekennzeichnet, dass die Labyrinthdichtungskammern (3) ständig in einem Einlass (4) bzw. einem Auslass (6) des Faserbündels (Y) der Druckdampfbehandlungskammer (2) bereitgestellt sind, und Trennplatten (3e) parallel zu dem Faserbündel (Y) und zwischen benachbarten Faserbündeln (Y) entlang in der Richtung parallel zu dem Faserbündel in der Labyrinthdichtungskammer (3) bereitgestellt sind, sodass im Gebrauch der Einrichtung (1) die Faserbündelbewegungsbahnen (5') in den Labyrinthdichtungskammern (3) für jeweils eines von den Faserbündeln (Y) durch die Trennplatte (3e) abgeteilt sind.


     
    2. Druckdampfbehandlungseinrichtung (1) nach Anspruch 1, wobei die Trennplatten (3e) ständig parallel zu und für jeweils ein Faserbündel (Y) bereitgestellt sind, wobei zumindest eine der Trennplatten (3e) zwischen einer der Labyrinthdüsen (3a) und einer weiteren, benachbarten Labyrinthdüse bereitgestellt ist.
     
    3. Druckdampfbehandlungseinrichtung (1) nach Anspruch 1 oder 2, wobei eine Länge (P1) von zumindest einer von den Trennplatten (3e) parallel zu dem Faserbündel (Y) zwischen 55 und 95 % einer Distanz (P2) zwischen einer Oberfläche der erstgenannten Labyrinthdüse (3a) und einer gegenüberliegenden Oberfläche einer benachbarten Labyrinthdüse (3a) beträgt.
     
    4. Druckdampfbehandlungseinrichtung (1) nach einem der vorstehenden Ansprüche, wobei die Trennplatten (3e) in einer inneren Oberfläche der oberen und/oder einer unteren Labyrinthplatte (3d), von welcher sich die Düsen erstrecken, bereitgestellt sind.
     
    5. Druckdampfbehandlungseinrichtung nach Anspruch 4, wobei eine Höhe der Trennplatten gleich der oder mehr als die Summe einer Höhe der oberen oder unteren Labyrinthdüse (3a) und einer Öffnungsdistanz zwischen den unteren Labyrinthdüsen (3a) des oberen Endes ist.
     
    6. Druckdampfbehandlungseinrichtung nach Anspruch 4, wobei die Trennplatten (3e) in den inneren Oberflächen der oberen und unteren Labyrinthplatten (3d) bereitgestellt sind und sich an den gegenüberliegenden Positionen befinden, und eine Höhe von einer der Trennplatten gleich der oder mehr als die Summe der Höhe der oberen oder unteren Labyrinthdüse (3a) und der Öffnungsdistanz zwischen den oberen und unteren Labyrinthdüsen (3a) ist.
     
    7. Druckdampfbehandlungseinrichtung nach Anspruch 4, wobei die Trennplatten (3e) in den inneren Oberflächen der oberen und unteren Labyrinthplatten (3d) bereitgestellt sind und sich an Positionen befinden, welche einander zwischen denselben Faserbündeln (Y) nicht beeinträchtigen, und die Summe der Höhen der Trennplatten (3e) gleich der oder mehr als die Distanz von der inneren Oberfläche der oberen Labyrinthplatte (3d) zu der inneren Oberfläche der unteren Labyrinthplatte (3d) gemacht wird.
     
    8. Druckdampfbehandlungseinrichtung nach Anspruch 2 oder Anspruch 3, wobei die Trennplatte (3e) in der erstgenannten Labyrinthdüse (3a) bereitgestellt ist.
     
    9. Druckdampfbehandlungseinrichtung nach einem der vorstehenden Ansprüche, wobei die Trennplatte (3e) nur in der Labyrinthdichtungskammer (3) bereitgestellt ist, deren Kammer vor der Druckdampfbehandlungskammer (2) angeordnet ist.
     
    10. Druckdampfbehandlungseinrichtung nach einem der vorstehenden Ansprüche, wobei die Faserbündelbewegungsbahn (5') nur in der hinteren Labyrinthdichtungskammer (3) in der Einlassseite des Faserbündels in der Labyrinthdichtungskammer (3) unterteilt ist.
     
    11. Verfahren zum Herstellen eines Kohlefaservorläuferfaserbündels, wobei eine Vielzahl von Faserbündeln (Y) durch die Druckdampfbehandlungseinrichtung (1) nach einem der vorstehenden Ansprüche in einem Klumpen gezogen werden.
     


    Revendications

    1. Appareil de traitement par vapeur sous pression (1), comprenant :

    une chambre de traitement par vapeur sous pression (2) configurée pour traiter, par vapeur sous pression, un faisceau de fibres (Y) se déplaçant dans une direction fixe ;

    deux chambres à joint à labyrinthe (3) s'étendant à partir des côtés avant et arrière de la chambre de traitement par vapeur sous pression (2) ;

    des buses à labyrinthe (3a) prévues dans les chambres à joint à labyrinthe (3) et agencées selon plusieurs étages en parallèle le long d'un d'une pluralité de trajets de déplacement de faisceaux de fibres (5'), les buses à labyrinthe (3a) étant configurées à partir de pièces de plaque s'étendant perpendiculairement vers les faisceaux de fibres (Y) à partir de surfaces de paroi interne supérieure et inférieure de la chambre à labyrinthe (3) ;

    des chambres d'expansion (3c') formées entre les buses à labyrinthe avant et arrière (3a) ; et

    des moyens pour traiter une pluralité des faisceaux de fibres (Y) se déplaçant en parallèle sous une atmosphère de vapeur sous pression en bloc,

    caractérisé en ce que les chambres à joint à labyrinthe (3) sont prévues de façon continue dans une entrée (4) et une sortie (6) du faisceau de fibres (Y) de la chambre de traitement par vapeur sous pression (2) respectivement, et des plaques de séparation (3e) sont prévues parallèlement au faisceau de fibres (Y) et le longeant, entre des faisceaux de fibres adjacents (Y) dans la direction parallèle au faisceau de fibres (Y) dans la chambre à joint à labyrinthe (3) de sorte que, lors de l'utilisation de l'appareil (1), les trajets de déplacement des faisceaux de fibres (5') dans les chambres à joint à labyrinthe (3) sont divisés pour chacun des faisceaux de fibres (Y) par la plaque de séparation (3e).


     
    2. Appareil de traitement par vapeur sous pression (1) selon la revendication 1, dans lequel les plaques de séparation (3e) sont prévues de façon continue parallèlement à un faisceau de fibres (Y) et pour chacun desdits faisceaux, au moins une desdites plaques de séparation (3e) étant prévue entre une des buses à labyrinthe (3a) et une autre buse à labyrinthe adjacente.
     
    3. Appareil de traitement par vapeur sous pression (1) selon la revendication 1 ou la revendication 2, dans lequel une longueur (P1) d'au moins une des plaques de séparation (3e) parallèle au faisceau de fibres (Y) représente entre 55 et 95 % d'une distance (P2) entre une surface de la buse à labyrinthe mentionnée initialement (3a) et une surface opposée d'une buse à labyrinthe adjacente (3a).
     
    4. Appareil de traitement par vapeur sous pression (1) selon une quelconque revendication précédente, dans lequel les plaques de séparation (3e) sont prévues dans une surface interne de la plaque à labyrinthe supérieure, et/ou d'une plaque à labyrinthe inférieure (3d) à partir desquelles s'étendent les buses.
     
    5. Appareil de traitement par vapeur sous pression selon la revendication 4, dans lequel une hauteur des plaques de séparation est égale ou supérieure à la somme d'une hauteur de la buse à labyrinthe supérieure ou inférieure (3a) et d'une distance d'ouverture entre les buses à labyrinthe d'extrémité supérieure (3a).
     
    6. Appareil de traitement par vapeur sous pression selon la revendication 4, dans lequel les plaques de séparation (3e) sont prévues dans les surfaces internes des plaques à labyrinthe supérieure et inférieure (3d) et se trouvent dans des positions opposées, et une hauteur d'une des plaques de séparation est égale ou supérieure à la somme de la hauteur de la buse à labyrinthe supérieure ou inférieure (3a) et de la distance d'ouverture entre les buses à labyrinthe supérieure et inférieure (3a).
     
    7. Appareil de traitement par vapeur sous pression selon la revendication 4, dans lequel les plaques de séparation (3e) sont prévues dans les surfaces internes des plaques à labyrinthe supérieure et inférieure (3d) et sont positionnées de manière à ne pas se gêner l'une l'autre entre les mêmes faisceaux de fibres (Y), et la somme des hauteurs des plaques de séparation (3e) est égale ou supérieure à la distance de la surface interne de la plaque à labyrinthe supérieure (3d) à la surface interne de la plaque à labyrinthe inférieure (3d).
     
    8. Appareil de traitement par vapeur sous pression selon la revendication 2 ou la revendication 3, dans lequel la plaque de séparation (3e) est prévue dans la buse à labyrinthe mentionnée initialement (3a).
     
    9. Appareil de traitement par vapeur sous pression selon une quelconque revendication précédente, dans lequel la plaque de séparation (3e) est prévue seulement dans la chambre à joint à labyrinthe (3), ladite chambre étant agencée devant la chambre de traitement par vapeur sous pression (2).
     
    10. Appareil de traitement par vapeur sous pression selon une quelconque revendication précédente, dans lequel le trajet de déplacement des faisceaux de fibres (5') est divisé seulement dans la chambre à joint à labyrinthe arrière (3) du côté d'entrée des faisceaux de fibres de la chambre à joint à labyrinthe (3).
     
    11. Procédé de fabrication d'un faisceau de fibres précurseur en fibre de carbone, dans lequel une pluralité de faisceaux de fibres (Y) sont étirés en bloc par l'appareil de traitement par vapeur sous pression (1) selon une quelconque revendication précédente.
     




    Drawing


























    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description