Global Patent Index - EP 0064167 B1

EP 0064167 B1 19851121 - PROCESS FOR PRODUCING HIGH TENACITY, HIGH MODULUS CRYSTALLINE THERMOPLASTIC ARTICLE AND NOVEL PRODUCT FIBERS

Title (en)

PROCESS FOR PRODUCING HIGH TENACITY, HIGH MODULUS CRYSTALLINE THERMOPLASTIC ARTICLE AND NOVEL PRODUCT FIBERS

Publication

EP 0064167 B1 19851121 (EN)

Application

EP 82102964 A 19820407

Priority

  • US 25926681 A 19810430
  • US 35901982 A 19820319
  • US 35902082 A 19820319

Abstract (en)

[origin: EP0064167A1] Solutions of ultrahigh molecular weigh polymers such as polyethylene in a relatively non-volatile solvent are extruded through an aperture (25) at constant concentration through the aperture and cooled to form a first gel of indefinite length (33). The first gels are extracted (D) with a volatile solvent to form a second gel (41) and the second gel is dried (E) to form a low porosity xerogel (47). The first gel, second gel or xerogel, or a combination, are stretched (F). Among the products obtainable are polyethylene fibers of greater than 38 or even 40 g/denier tenacity and of modulus greater than 1000 or even 1600 or 2000 g/denier.

IPC 1-7

D01F 6/04

IPC 8 full level

D01F 6/04 (2006.01); B29C 49/00 (2006.01); B29C 55/00 (2006.01); B29C 55/04 (2006.01); C08J 5/18 (2006.01); D01F 6/02 (2006.01); D01F 6/06 (2006.01); D01F 6/12 (2006.01); D01F 6/66 (2006.01); D02J 1/22 (2006.01)

CPC (source: EP KR)

D01F 6/02 (2013.01 - EP); D01F 6/04 (2013.01 - EP KR); D01F 6/06 (2013.01 - EP KR)

Citation (examination)

  • POLYMER BULLETIN, vol.1, 1979, Springer Verlag, Berlin (DE) B. KALB et al.: "Spinning of high molecular weight polyethylene solution and subsequent drawing in a temperature gradient", pages 871-876
  • POLYMER BULLETIN, vol.2, 1980, Springer Verlag, Berlin (DE) J. SMOOK et al.: "Influence of spinning/hot drawing conditions on the tensile strenght of porous high molecular weight polyethylene", pages 775-783
  • Journal of Materials Science, 15, (1980), pages 505-514

Designated contracting state (EPC)

BE CH DE FR GB IT LI NL SE

DOCDB simple family (publication)

EP 0064167 A1 19821110; EP 0064167 B1 19851121; AU 5024285 A 19860612; AU 549453 B2 19860130; AU 581702 B2 19890302; AU 8225482 A 19821104; CA 1174818 A 19840925; DE 3267521 D1 19860102; ES 513190 A0 19830616; ES 8306775 A1 19830616; JP 2582985 B2 19970219; JP H05106107 A 19930427; JP S585228 A 19830112; KR 830010224 A 19831226; KR 860000202 B1 19860303

DOCDB simple family (application)

EP 82102964 A 19820407; AU 5024285 A 19851121; AU 8225482 A 19820401; CA 401450 A 19820422; DE 3267521 T 19820407; ES 513190 A 19820522; JP 7329782 A 19820430; JP 9552992 A 19920415; KR 820001890 A 19820429