Global Patent Index - EP 0008612 B1

EP 0008612 B1 19810610 - METHOD AND APPARATUS FOR MANUFACTURING POLYVINYLIDENE FLUORIDE MONOFILAMENTS

Title (en)

METHOD AND APPARATUS FOR MANUFACTURING POLYVINYLIDENE FLUORIDE MONOFILAMENTS

Publication

EP 0008612 B1 19810610 (DE)

Application

EP 79101882 A 19790611

Priority

DE 2837751 A 19780830

Abstract (en)

[origin: US4264555A] A process for the production of monofilaments of polyvinylidene fluoride is disclosed wherein polyvinylidene fluoride is plasticized in an extruder and fed to an extrusion die and passed through an extrusion nozzle orifice to enter a liquid cooling medium having a thermal conductivity of under 0.4 W/m DEG K., a viscosity at 100 DEG C. of over 0.5 cp and a density at 100 DEG C. of over 1.1 g/cm3. Extusion is performed by passing the plasticized polyvinylidene fluoride over separate extrusion zones such as by passing the polyvinylidene fluoride over a first extrusion zone maintained at a first extrusion temperature and thereafter passing the polyvinylidene fluoride through a second extrusion zone maintained at a temperature of 10 to 30 percent higher than the preceeding extrusion zone. An apparatus for carrying out the process is also described.

IPC 1-7

D01F 6/12; D01D 5/088; D01D 4/02

IPC 8 full level

D01D 4/02 (2006.01); D01D 5/088 (2006.01); D01F 6/12 (2006.01)

CPC (source: EP US)

D01D 4/02 (2013.01 - EP US); D01D 5/0885 (2013.01 - EP US); D01F 6/12 (2013.01 - EP US)

Citation (examination)

  • GB 880059 A 19611018 - DU PONT
  • FR 1496763 A 19671006 - GRACE W R & CO
  • JP S4925069 A 19740306
  • JP S4526566 B1
  • Journal of Applied Polymer Science Vol. 7, Issue 2 (1963) Seiten 87-89
  • Stanley E. Ross in Textile Research Journal, Juli 1964, Vol. 34, S. 565-571
  • Ludwig Rebenfeld, Encyclopedia of Polymer Science and Technologie, Band 6(1965), Seite 562
  • Kolbeck and Uhlmann "Processing of Semicrystalline Polymers by High-Stress Extrusion" in Journal of Polymer Science, Vol. 15, Seiten 27-42, 1977
  • Z.D. Jastrzebski, Encyclopedia of Polymer Science and Technologie, Vol. 2, Seite 147
  • W.C. Sheehan and T.B. Cole, Journal of Applied Polymer Science, Vol. 8, Seiten 2359-2388(1964)

Designated contracting state (EPC)

BE CH DE FR GB SE

DOCDB simple family (publication)

EP 0008612 A1 19800319; EP 0008612 B1 19810610; DE 2837751 A1 19800313; DE 2837751 C2 19831215; DE 2960400 D1 19810917; JP S5536389 A 19800313; US 4264555 A 19810428

DOCDB simple family (application)

EP 79101882 A 19790611; DE 2837751 A 19780830; DE 2960400 T 19790611; JP 10923979 A 19790829; US 6948879 A 19790824