MULTILAYERED 4-METHYL-1-PENTENE COPOLYMER FILM AND PROCESS FOR PRODUCING THE SAME

Title:

MULTILAYERED 4-METHYL-1-PENTENE COPOLYMER FILM AND PROCESS FOR PRODUCING THE SAME

Document Type and Number:

WIPO Patent Application WO/2002/024449

Kind Code:

A1

Abstract:

A multilayered 4-methyl-1-pentene copolymer film which is a laminate comprising layers (A) made of a 4-methyl-1-pentene copolymer and a layer (B) made of polypropylene or polyethylene and optionally further having one or more layers (C) made of an adhesive resin, the layers (A) being disposed respectively on both sides of the layer (B) optionally through the layers (C), the film having been monoaxially stretched at least 2 times or having been biaxially stretched at least 1.5 times in each of the machine and transverse directions. The multilayered film has satisfactory stretchability in production, has high rigidity, and has satisfactory releasability from blackened copper foils. It is suitable for use as a release film for MLB production.

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Inventors:

NAKAHARA TAKASHI (JP)
IMUTA SHINICHI (JP)
SHIGEMOTO HIROMI (JP)

Application Number:

PCT/JP2001/008143

Publication Date:

March 28, 2002

Filing Date:

September 19, 2001

Export Citation:

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Assignee:

MITSUI CHEMICALS INC (JP)
NAKAHARA TAKASHI (JP)
IMUTA SHINICHI (JP)
SHIGEMOTO HIROMI (JP)

International Classes:

B32B27/32; B32B33/00; H05K3/46; (IPC1-7): B32B27/32

Foreign References:

JPS5098582A	1975-08-05
JPH07165940A	1995-06-27
EP0943427A1	1999-09-22
EP0376681A2	1990-07-04

Other References: