Process for producing oriented composite polyolefin resin films

Details Process for producing oriented composite polyolefin resin films Process for producing oriented composite polyolefin resin films

1982-05-04

1984-09-18

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

15624424, B29D 702

Patent

active

044722273

ABSTRACT:
A process for producing an oriented composite polyolefin resin film which comprises melt-laminating a polyolefin resin sheet for a paper-like layer on at least one surface of a monoaxially stretched polyolefin resin sheet for a substrate layer, and then stretching the resulting laminated sheet in a direction perpendicular to said monoaxially stretched direction. The polyolefin resin sheet for the substrate layer is a sheet of composite structure prepared by melt-extruding the specific compositions (A), (B), and (C) through a co-extrusion die in such a manner that a layer composed of the thermoplastic resin composition (A) is laminated on one surface of an intermediate layer composed of the polyolefin composition (B) containing a filler and a layer composed of the thermoplastic resin composition (C) is laminated on the other surface of the intermediate layer. Said polyolefin resin sheet for the paper-like layer is composed of a specific polyolefin composition (D) containing a filler.

REFERENCES:
patent: 3737354 (1973-06-01), Hattori
patent: 3741841 (1973-06-01), Toyoda et al.
patent: 3790435 (1974-02-01), Tanba et al.
patent: 3841943 (1974-10-01), Takashi et al.
patent: 3871947 (1975-03-01), Brekken
patent: 4086317 (1978-04-01), Miyabe
patent: 4086383 (1978-04-01), Yamano et al.
patent: 4318950 (1982-03-01), Takashi et al.

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