(19)
(11)EP 3 647 055 A1

(12)EUROPEAN PATENT APPLICATION

(43)Date of publication:
06.05.2020 Bulletin 2020/19

(21)Application number: 18207685.1

(22)Date of filing:  22.11.2018
(51)Int. Cl.: 
B32B 33/00  (2006.01)
B44C 5/04  (2006.01)
F21V 33/00  (2006.01)
B29C 65/48  (2006.01)
F21V 23/00  (2015.01)
B29C 43/18  (2006.01)
B60R 13/02  (2006.01)
B29C 45/14  (2006.01)
B44C 3/00  (2006.01)
B32B 3/26  (2006.01)
(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
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30)Priority: 01.11.2018 KR 20180132950

(71)Applicants:
  • Intops. Co., Ltd.
    Anyang-si, Gyeonggi-do 14088 (KR)
  • Kim, Keun Ha
    Anyang-si, Gyeonggi-do 14088 (KR)

(72)Inventors:
  • KIM, Keun ha
    Anyang-si, Gyeonggi-do (KR)
  • CHOI, Won jae
    14088 Anyang-si, Gyeonggi-do (KR)
  • LEE, Hong il
    14088 Anyang-si, Gyeonggi-do (KR)

(74)Representative: Zardi, Marco 
M. Zardi & Co. SA Via Pioda 6
6900 Lugano
6900 Lugano (CH)

 
Remarks:
Amended claims in accordance with Rule 137(2) EPC.
 


(54)INTERIOR MATERIAL HAVING COMPOSITE LAYER STRUCTURE CAPABLE OF LIGHT EMISSION THROUGH VARIOUS LOGO PATTERNS AND METHOD OF MANUFACTURING THE SAME


(57) Disclosed herein is a method of manufacturing an interior material, which can implement various and distinct light emission effects by disposing a light-blocking layer configured to block light emitted from a light source on a wood layer or transparent film and then allowing the component of the transparent film to fill lighting grooves formed by laser-etching. Since a tape configured to support an island is employed, stable manufacturing is possible throughout an overall process.




Description

BACKGROUND


1. Technical Field



[0001] The present invention relates to an interior material having a composite layer structure capable of light emission through various logo patterns, and a method of manufacturing the same. More specifically, the present invention relates to an interior material having a composite layer structure, which includes an improved blocking structure required to appropriately emit light through logo patterns and a logo lighting portion, and a method of manufacturing the same.

2. Description of the Related Art



[0002] The term "interior material" refers to a material used to finish the exterior of a product. The interior material functions to improve the appearance of a product, such as texture and touch feeling, and to protect internal components by blocking noise, flame, oxygen, etc. The interior material is preferably manufactured so that aesthetic elements can be expressed externally.

[0003] Korean Patent No. 10-0913811 discloses a molded article including a real wood film, which is used as an interior material. The molded article is manufactured by heat-pressing an adhesive film on the upper and lower sides of a real wool sheet. The molded article manufactured as described above is applied to automotive interior/exterior materials or various electronic product panels. Since the interior material includes the real wood material, it mimics the texture of natural wood, and can thus exhibits an aesthetic appearance.

[0004] In recent years, as shown in FIG. 1, an interior material having a logo 102,' such as "ABCDE," formed on a molded article 100' made of real wood material has been proposed. This interior material is configured to emit light through the logo 102.' A portion isolated from other portions by the logo 102' is an island 104'.

[0005] As a method of emitting light through the logo 102,' Korean Patent No. 10-1883080, filed by the present applicant, discloses a technology of emitting light through the logo portion by forming a light-blocking layer under a real wood layer which is a main surface material, forming a touch sensor electrode under the light-blocking layer, and disposing a light source under the touch sensor electrode. However, in the above-mentioned patent, lighting grooves through which light passes are hollow, and thus a foreign material, such as dust, may be deposited in the hollow portion, thus reducing transmittance. In addition, the disclosed technology has disadvantages in that it is difficult to apply to a composite film structure composed of two or more film layers, and thus the molded article has weak durability, and in that it is difficult to form various logo patterns. Furthermore, since the molded article has no support configured to support the island portion, a problem arises in that the precise injection molding of the island portion is difficult during the manufacture of the molded article.

SUMMARY



[0006] Accordingly, an object of the present invention is to provide a method of manufacturing an interior material having a multilayer structure, which can form a logo lighting portion having various patterns and can easily manufacture an interior material having excellent durability.

[0007] The method of manufacturing an interior material according to the present invention can implement various and clear light emission effects by disposing a blocking layer configured to block light emitted from a light source at a location adjacent to a wood layer or inner transparent film as a material layer and then allowing the component of the transparent film to fill lighting grooves formed by laser etching.

[0008] More specifically, the present invention provides a method of manufacturing an interior material, comprising the steps of: (1-1) bonding a blocking layer for blocking the transmission of light below a material layer with a hot-melt layer interposed therebetween; (1-2) attaching a support tape for supporting an island to the upper surface of the material layer; (1-3) forming lighting grooves, through which light passes, by laser-etching a predetermined portion from the blocking layer to the material layer; (2-1) attaching a binder to a transparent film; (3-1) combining a module resulting from step (1-3) with a module resulting from step (2-1); (3-2) replacing the support tape on the material layer with a fresh support tape; and (3-3) obtaining an interior material by bonding a product from step (3-2) to a base material or an article to be processed, which has a base layer, to obtain a molding material, and then subjecting the molding material to an injection molding process, wherein the injection molding process is performed at high temperature such that the transparent film is melted and stretched to fill the lighting grooves.

[0009] Furthermore, the present invention provides an interior material manufactured by the above-described method.

BRIEF DESCRIPTION OF THE DRAWINGS



[0010] The above and other objects, features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a view showing a molded article including a real wood material;

FIGS. 2a to 2c are flowcharts showing a method of manufacturing an interior material including a logo lighting portion according to a first embodiment of the present invention; and

FIGS. 3a to 3g are sectional views of members manufactured by the steps shown in FIG. 2.


DETAILED DESCRIPTION



[0011] Some embodiments of the present invention will be described in detail below with reference to the exemplary drawings.

[0012] It should be noted that the same reference symbols are assigned to the same components as much as possible even when they are illustrated in different drawings. In the following description of the embodiments, when it is determined that a detailed description of a related well-known function or configuration may make the gist of the present invention obscure, it will be omitted.

[0013] The following embodiments of the present invention are partially characterized by specifying a particular material for filling lighting grooves, i.e., guides through which light emitted from a light source passes.

[0014] FIGS. 2a to 2c are flowcharts showing a method of manufacturing an interior material including a logo lighting portion according to a first embodiment of the present invention, and FIGS. 3a to 3g are sectional views of members manufactured by the respective steps shown in FIG. 2.

[0015] Referring to these drawings together, first, a wood or material layer 10 is provided as a main material that forms the outer portion of the interior material. In this case, the "wood" is merely one example, and fabric, stone, artificial leather, carbon fiber reinforced plastic (CFRP), or glass fiber reinforced plastic (GFRP) may be used instead of the wood. A blocking layer 14 is placed below the material layer 10 with a hot-melt layer 12 interposed therebetween. The hot-melt layer 12 may include a nonwoven material, such as pulp, fiber or mesh, and a thermoplastic polymer composition having appropriate thermal reaction characteristics. Another hot-melt layer 16 is placed on the lower surface of the blocking layer 14. The blocking layer 14 is intended to block light emitted from a light source (not shown) and prevent a portion, other than logos, from being lit, and is fabricated by performing printing or painting on a transparent film. The material layer 10 and the blocking layer 14 are bonded to each other by, for example, a roll laminating process at step S10.

[0016] Thereafter, a support tape 18 is attached to the other surface (i.e., the upper surface) of the material layer 10 in order to support an island at step S12. The support tape 18 functions to support and fix the island during a process of forming lighting grooves to be described below. The support tape 18 is made of, for example, a polyethylene terephthalate (PET)-based silicone material.

[0017] Thereafter, lighting grooves L1 and L2 that pass through the hot-melt layer 16 and the material layer 10 are formed by laser etching at step S14. The lighting grooves L1 and L2 are shown by way of example, and may be formed in the shape of one or more lines. Via the above process, a first module 50 constituting part of the interior material of the present invention is obtained (see FIG. 3c). It will be understood by those skilled in the art that the first module 50 includes at least the material layer 10, the blocking layer 14, and the lighting grooves L1 and L2.

[0018] Meanwhile, separately from the above-described process, as shown in FIG. 3d, a second module 60 is obtained by attaching a binder 22 to a transparent film 20 at step S20. The transparent film 20 may be, for example, an optical transparent film made of a thermoplastic polymer selected from the group consisting of polycarbonate (PC), polyimide (PI), polyethersulfone (PES), polyarylate (PAR), poly(ethylene naphthalate) (PEN), polyethylene terephthalate (PET), a cycloolefin copolymer, and a mixture of two or more thereof. The binder 22 is preferably a copolymer, such as acrylic resin, but may be also made of a metal or ceramic material to be bonded to a base material layer.

[0019] Thereafter, the first module 50 and the second module 60 are bonded to each other by a heat pressing process with the hot-melt layer 16 interposed therebetween at step S30 (see FIG. 3e) .

[0020] The support tape 18 located on the material layer 10 may have small powder precipitates produced during the etching of the lighting grooves L1 and L2. To remove this precipitates, the support tape 18 is peeled off, and a fresh support tape 18A is attached at step S32. The support tape 18A functions to protect the upper surface of the material layer including an island during a molding process to be described below.

[0021] Finally, the resulting material is bonded to a base material or an article to be processed, which includes a base material layer 24, and is then subjected to an injection molding process, thereby obtaining an interior material at step S34. Since a light source (not shown) is disposed under the base material layer 24, the base material layer 24 is made of a transparent or semitransparent material, such as polycarbonate (PC) or acrylonitrile butadiene styrene (ABS) resin in order to enable sufficient light transmittance. As shown in FIG. 3g, the injection molding process is performed at high temperature such that the transparent film 20 is melted and stretched to fill the lighting grooves L1 and L2.

[0022] Therefore, according to the above-described embodiment of the present invention, an interior material having a composite layer can be fabricated by coupling the first module 50 and the second module 60 to each other. Clearer logo lighting can be expected due to the resin component of the transparent film 20 filling the lighting grooves L1 and L2, and foreign materials can be prevented from entering the lighting grooves L1 and L2.

[0023] As described above, according to the present invention, clearer logo lighting can be made possible via the transparent film filling the lighting grooves in the interior material having the composite layer, and foreign materials can be prevented from entering the lighting grooves, and a logo lighting portion having various patterns can be formed.

[0024] The method of manufacturing the interior material according to the present invention is simple, cost-effective, and advantageous in terms of cost saving.

[0025] Although the preferred embodiments of the present invention have been described for illustrative purposes, these are merely examples, and do not limit the scope of the present invention. Various modifications may be made without departing from the scope of the invention, and fall within the scope of the present invention. The scope of the present invention is defined based on the attached claims.


Claims

1. A method of manufacturing an interior material, comprising the steps of:

(1-1) bonding a blocking layer for blocking transmission of light below a material layer with a hot-melt layer interposed therebetween;

(1-2) attaching a support tape for supporting an island to the upper surface of the material layer;

(1-3) forming lighting grooves, through which light passes, by laser-etching a predetermined portion from the blocking layer to the material layer;

(2-1) attaching a binder to a transparent film;

(3-1) combining a module resulting from step (1-3) with a module resulting from step (2-1);

(3-2) replacing the support tape on the material layer with a fresh support tape; and

(3-3) obtaining an interior material by bonding a product from step (3-2) to a base material or an article to be processed, which has a base layer, to obtain a molding material, and then subjecting the molding material to an injection molding process, wherein the injection molding process is performed at high temperature such that the transparent film is melted and stretched to fill the lighting grooves.


 
2. The method of claim 1, wherein the transparent film is made of a thermoplastic polymer selected from the group consisting of polycarbonate (PC), polyimide (PI), polyethersulfone (PES), polyarylate (PAR), poly(ethylene naphthalate) (PEN), polyethylene terephthalate (PET), a cycloolefin copolymer, and a mixture of two or more thereof.
 
3. The method of claim 1, wherein the material layer is made of one of wood, fabric, stone, artificial leather, carbon fiber reinforced plastic (CFRP), and glass fiber reinforced plastic (GFRP).
 
4. An interior material manufactured according to the method of any one of claims 1 to 3.
 


Amended claims in accordance with Rule 137(2) EPC.


1. A method of manufacturing an interior material, comprising the steps of:

(1-1) bonding a blocking layer (14) for blocking transmission of light below a material layer (10) with a hot-melt layer (12) interposed therebetween;

(1-2) attaching a support tape (18) for supporting an island to the upper surface of the material layer (10);

(1-3) forming lighting grooves (L1, L2), through which light passes, by laser-etching a predetermined portion from the blocking layer (14) to the material layer (10);

(2-1) attaching a binder (22) to a transparent film (20);

(3-1) combining a module resulting from step (1-3) with a module resulting from step (2-1);

(3-2) replacing the support tape (18) on the material layer (10) with a fresh support tape (18); and

(3-3) obtaining an interior material by bonding a product from step (3-2) to a base material or an article to be processed, which has a base layer, to obtain a molding material, and then subjecting the molding material to an injection molding process, wherein the injection molding process is performed at high temperature such that the transparent film (20) is melted and stretched to fill the lighting grooves (L1, L2).


 
2. The method of claim 1, wherein the transparent film (20) is made of a thermoplastic polymer selected from the group consisting of polycarbonate (PC), polyimide (PI), polyethersulfone (PES), polyarylate (PAR), poly(ethylene naphthalate) (PEN), polyethylene terephthalate (PET), a cycloolefin copolymer, and a mixture of two or more thereof.
 
3. The method of claim 1, wherein the material layer (10) is made of one of wood, fabric, stone, artificial leather, carbon fiber reinforced plastic (CFRP), and glass fiber reinforced plastic (GFRP).
 
4. The method of claim 1, further comprising: removing the fresh support tape (18A) from the molding material, after the step (3-3).
 
5. An interior material manufactured according to the method of any one of claims 1 to 4.
 




Drawing























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