EP 0608248 B1 19970730 - PTFE FIBRE MATERIAL AND PROCESS FOR MAKING IT
Title (en)
PTFE FIBRE MATERIAL AND PROCESS FOR MAKING IT
Title (de)
FASERMATERIAL AUS PTFE UND VERFAHREN ZU SEINER HERSTELLUNG
Title (fr)
MATIERE FIBREUSE EN PTFE ET SON PROCEDE DE FABRICATION
Publication
Application
Priority
- DE 4130356 A 19910912
- DE 9200712 W 19920827
Abstract (en)
[origin: US5700572A] PCT No. PCT/DE92/00712 Sec. 371 Date Jun. 2, 1995 Sec. 102(e) Date Jun. 2, 1995 PCT Filed Aug. 27, 1992 PCT Pub. No. WO93/05213 PCT Pub. Date Mar. 18, 1993The invention provides a fiber material of PTFE and, optionally, hydrophilizing additives, for use in the production of diaphragms for the electrolysis of alkali chlorides, as well as for filter layers. The fiber material comprises fiber bundles and these, in turn, comprise individual microfibrils, there being irregularly shaped interstices between the microfibrils. The fiber material is produced in that a PTFE dispersion, consisting of a salt solution with PTFE particles and, optionally, hydrophilizing additives, is treated in a hot gas/vapor stream in a fluidized bed apparatus charged with inert solids. The method permits the fiber material to be produced also in larger quantities in an economic manner.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
D01D 5/00 (2013.01 - EP US); D01F 6/12 (2013.01 - EP US); Y10T 428/29 (2015.01 - EP US); Y10T 428/2913 (2015.01 - EP US)
Citation (examination)
- EP-A- 0 418 155
- WO-A-86/01841
- GB-A- 1 355 373
- US-A- 5 009 971
Designated contracting state (EPC)
BE FR GB NL
DOCDB simple family (publication)
US 5700572 A 19971223; DE 4130356 A1 19930408; DE 4130356 C2 19950126; EP 0608248 A1 19940803; EP 0608248 B1 19970730; WO 9305213 A1 19930318
DOCDB simple family (application)
US 32528595 A 19950602; DE 4130356 A 19910912; DE 9200712 W 19920827; EP 92918372 A 19920827