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Title:
FILM FOR STRETCH PACKAGING
Document Type and Number:
Japanese Patent JP2001054937
Kind Code:
A
Abstract:

To obtain a film excellent in transparency, adaptability for packaging machine, package finishing, cutting properties, heat sealing properties, sticking strength by forming a base material layer out of a specified polypropylene resin, hydrogenated resins, etc., forming a surface layer out of a specified ethylene-vinyl acetate copolymer, and making a crystal orientation coefficient a specified value.

A base material layer is formed of a composition of 90-20 wt.% of a polypropylene resin which is formed from a polypropylene component and a propylene-ethylene random copolymer and has characteristics of 10-40 mole % of an ethylene content, 4-16 of weight average molecular weight/number average molecular weight, and 20-53 wt.% (below 20°C), 20-75 wt.% (100°C or above) 5-50 wt.% of an eluted component, 5-40 wt.% of a crystalline polypropylene resin, and 5-40 wt.% of a hydrogenated resins, and both surface layers are formed from an ethylene-vinyl acetate copolymer of 5-20 wt.% of a monomer content based on vinyl acetate, and the crystal orientation coefficient in the extrusion direction by the X-ray diffraction method of a laminated film is made 0.25 or below.


Inventors:
KAWAMURA HIDETOSHI
SHIRAISHI TAIICHI
Application Number:
JP23051599A
Publication Date:
February 27, 2001
Filing Date:
August 17, 1999
Export Citation:
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Assignee:
TOKUYAMA CORP
International Classes:
B65D65/40; B32B27/28; B32B27/32; B32B37/15; C08L23/10; C08L23/16; C08L57/02; C08L93/04; (IPC1-7): B32B27/28; B32B27/32; B32B31/30; B65D65/40; C08L23/10; C08L23/16; C08L57/02; C08L93/04
Domestic Patent References:
JPH11115122A1999-04-27
JPH09154479A1997-06-17
JPH11170458A1999-06-29
JPH11165389A1999-06-22
JPH10330430A1998-12-15