EP 0957187 A3 20000816 - Apparatus and process for the production of microfilament yarns with high titer regularity from thermoplastic polymers
Title (en)
Apparatus and process for the production of microfilament yarns with high titer regularity from thermoplastic polymers
Title (de)
Vorrichtung und Verfahren zur Herstellung von Mikrofilamenten von hoher Titer-Gleichmässigkeit aus thermoplastischen Polymeren
Title (fr)
Dispositif et procédé pour la fabrication de fils microfilaments avec haute regularité de titre à base de polymères thermoplastiques
Publication
Application
Priority
DE 19821778 A 19980514
Abstract (en)
[origin: EP0957187A2] Microfilament yarns of less than 500 dtex are spun with spinnerets with a hole density of up to 40 holes/cm<2> with radial outflow cooling air from a central cooling unit (5) with integrated holder and air supply duct (7) at a distance (S) from the spinneret (2). The value of S in mm is given by a specified equation (I). Microfilament yarns of less than 500 dtex are spun with spinnerets with a hole density of up to 40 holes/cm<2> with radial outflow cooling air from a central cooling unit (5) with integrated holder and air supply duct (7) at a distance (S) from the spinneret (2). The value of S in mm is given by equation (I). S = ((1.4 x exp(2.01 x TEK))/<4> square root of RL) -1 (I) TEK = the dtex value per filament; and RL = the number of rows of holes. An Independent claim is also included for the process of spinning yarns between 22 and 500 dtex with filaments below 1 dtex at 2000-7000 m/min with cooling air starting at a distance (S) given by formula (I). The maximum value of (S) is 35 mm, the spinneret surface is cooled uniformly up to 10 degrees C below the melt temperature and the solidification point is 1-40 mm beyond the end of the cooling unit (5), depending on yarn thickness and speed.
IPC 1-7
IPC 8 full level
D01D 5/08 (2006.01); D01D 5/088 (2006.01)
CPC (source: EP KR US)
D01D 5/08 (2013.01 - EP KR US); D01D 5/088 (2013.01 - EP US)
Citation (search report)
- [A] WO 9201093 A1 19920123 - ENGINEERING DER VOEST ALPINE I [DE]
- [A] FR 2611748 A2 19880909 - INVENTA AG [CH]
- [A] EP 0334604 A2 19890927 - MITSUI PETROCHEMICAL IND [JP]
- [A] EP 0408994 A1 19910123 - SCHWEIZERISCHE VISCOSE [CH]
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0957187 A2 19991117; EP 0957187 A3 20000816; CN 1105196 C 20030409; CN 1236029 A 19991124; DE 19821778 A1 19991118; DE 19821778 B4 20040506; JP H11350238 A 19991221; KR 19990088232 A 19991227; TR 199901078 A2 19991221; TR 199901078 A3 19991221; TW 493017 B 20020701; US 6174474 B1 20010116
DOCDB simple family (application)
EP 99109026 A 19990507; CN 99106710 A 19990514; DE 19821778 A 19980514; JP 13375299 A 19990514; KR 19990016987 A 19990512; TR 9901078 A 19990514; TW 88107273 A 19990505; US 30959199 A 19990511