EP 1574603 B1 20091028 - Polytetrafluoroethylene fiber and method for manufacturing the same
Title (en)
Polytetrafluoroethylene fiber and method for manufacturing the same
Title (de)
Polytetrafluorethylenfaser und Verfahren zu deren Herstellung
Title (fr)
Fibre de polytétrafluoroéthylène et son procédé de production
Publication
Application
Priority
- JP 2004065889 A 20040309
- JP 2004290687 A 20041001
Abstract (en)
[origin: EP1574603A1] A polytetrafluoroethylene (PTFE) fiber includes a filament (1) obtained by partially slitting an oriented PTFE film in a lengthwise direction of the film. Emboss processing is conducted linearly along the lengthwise direction of the film and like a zigzag shape or a convexo-concave shape in a width direction of the film, followed by slitting, whereby the filament (1) includes a network structure (3) in which single fibrils (2) that are opened partially are arranged regularly. A PTFE short fiber is obtained by cutting the above filament and includes a branch structure. Thereby, a PTFE fiber with a small average fineness of single fibrils, a uniform fineness and a single-peak distribution with the peak at a center of fineness and with a high production yield and uniform and stable branch structure can be provided and a method for manufacturing the PTFE fiber can be provided. <IMAGE>
IPC 8 full level
CPC (source: EP)
D01D 5/423 (2013.01); D01F 6/12 (2013.01)
Designated contracting state (EPC)
AT DE ES FR GB IT
DOCDB simple family (publication)
EP 1574603 A1 20050914; EP 1574603 B1 20091028; AT E447055 T1 20091115; CN 100425746 C 20081015; CN 1676688 A 20051005; DE 602005017321 D1 20091210
DOCDB simple family (application)
EP 05005155 A 20050309; AT 05005155 T 20050309; CN 200510053046 A 20050308; DE 602005017321 T 20050309