EP 0888210 A4 20010411 - VOIDED UNIAXIALLY ORIENTED FILMS

Title (en)

VOIDED UNIAXIALLY ORIENTED FILMS

Title (de)

UNIAXIAL ORIENTIERTE FILME MIT HOHLRÄUMEN

Title (fr)

FILMS ALVEOLES UNIAXIALEMENT ORIENTES

Publication

EP 0888210 A4 20010411 (EN)

Application

EP 97905904 A 19970204

Priority

US 9702141 W 19970204
US 60613596 A 19960223

Abstract (en)

[origin: WO9730841A1] The invention is a uniaxially oriented film (10) comprising a polymer film (16) of at least one layer wherein within the layer is located a strata of voids. The voids cause the film to have an opacity greater than about 30 %. The invention is further a uniaxially oriented film comprising a polymer film of at least one layer wherein within the layer is located a strata of voids wherein essentially all of the voids are closed. The invention is further a process for orienting a voided film comprising the step of orienting a film consisting essentially of non-spherical void initiating particles wherein the particles cause the film to have an opacity greater than about 30 %. The invention is further the process for uniaxially orienting the above films.

IPC 1-7

B32B 3/26; B32B 5/30

IPC 8 full level

G09F 3/02 (2006.01); B29C 47/06 (2006.01); B32B 5/18 (2006.01); B32B 7/12 (2006.01); B32B 27/08 (2006.01); C08J 9/00 (2006.01); C09J 7/02 (2006.01); B29L 7/00 (2006.01); B29L 9/00 (2006.01)

CPC (source: EP US)

B32B 7/12 (2013.01 - US); B32B 27/08 (2013.01 - EP US); B32B 27/205 (2013.01 - US); B32B 37/153 (2013.01 - US); B32B 2405/00 (2013.01 - US); B32B 2519/00 (2013.01 - US)

Citation (search report)

[X] US 5451283 A 19950919 - JOSEPHY KARL [US], et al
[X] US 4350655 A 19820921 - HOGE WILLIAM H
[X] EP 0390572 A2 19901003 - CHISSO CORP [JP], et al
[A] US 3697367 A 19721010 - SCHWARZ ECKHARD C A
[A] US 5204418 A 19930420 - YASUE KENJI [US], et al
[DA] US 4713273 A 19871215 - FREEDMAN MELVIN S [US]
See references of WO 9730841A1

Designated contracting state (EPC)

BE CH DE FR GB LI LU NL

DOCDB simple family (publication)

WO 9730841 A1 19970828; AU 2268497 A 19970910; AU 722889 B2 20000810; BR 9707686 A 19990727; CA 2247026 A1 19970828; EP 0888210 A1 19990107; EP 0888210 A4 20010411; JP 2000506188 A 20000523; MX 9806787 A 19981129

DOCDB simple family (application)

US 9702141 W 19970204; AU 2268497 A 19970204; BR 9707686 A 19970204; CA 2247026 A 19970204; EP 97905904 A 19970204; JP 53020597 A 19970204; MX 9806787 A 19980821