Title:
HEAT-SEALABLE POROUS POLYESTER FILM
Document Type and Number:
Japanese Patent JP3314814
Kind Code:
B2
Abstract:
PURPOSE: To obtain a polyester film imparting sharp printing or duplication, having durability, excellent in hiding power, whiteness and heat sealability and especially suitable for a packing material by providing a heat-sealing layer and rationalizing the pore size.
CONSTITUTION: In a polyester film containing a large amount of fine pores produced by at least uniaxially orienting a polymer mixture wherein a thermoplastic resin incompatible with polyester is mixed with polyester, the content of pores contained in the surface layer up to a depth of 3μm from the surface of the polyester film is set to 4vol.% or less and the average pore content of the whole layer of the film is set to 8-50vol.%. A heat-sealing layer composed of copolyester is provided to at least the single surface of this film.
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Inventors:
Katsuya Ito
Application Number:
JP14146492A
Publication Date:
August 19, 2002
Filing Date:
June 02, 1992
Export Citation:
Assignee:
TOYO BOSEKI KABUSHIKI KAISHA
International Classes:
B32B5/18; B32B7/10; B32B27/00; B32B27/36; C08J9/00; (IPC1-7): B32B5/18; B32B27/00; B32B27/36; C08J9/00
Domestic Patent References:
| JP2284929A | ||||
| JP4153233A | ||||
| JP4153232A | ||||
| JP4149250A | ||||
| JP564564A |
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