THERMALLY SHRINKABLE POLYESTER FILM

Title:

THERMALLY SHRINKABLE POLYESTER FILM

Document Type and Number:

Japanese Patent JPH044229

Kind Code:

A

Abstract:

PURPOSE:To provide the subject film comprising ethylene terephthalate units and polyethylene glycol units in specific amounts, respectively, useful as a packaging material for covering and binding articles and having a sufficient thermal shrinkage degree in a prescribed direction, good strength and beautiful appearance. CONSTITUTION:The objective film contains at least one kind of polyester in which 50-90mol% of the polyester is a dicarboxylic acid component such as terephthalic acid, isophthalic acid of ethylene terephthalate units and 0.05-10mol.% is a diol component composed of polyethylene glycol units and/or polyethylene glycol copolymer units (preferably having a mol.wt. of 200-20000) and, if necessary, a lubricant, a coloring agent, etc., followed by forming the resin composition into the objective film which has a 100 deg.C thermal shrinkage degree of >=30% in a prescribed direction at >=100 deg.C.

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Inventors:

KUZE KATSURO
YOSHINAKA YASUO

Application Number:

JP10587690A

Publication Date:

January 08, 1992

Filing Date:

April 20, 1990

Export Citation:

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Assignee:

TOYO BOSEKI

International Classes:

C08J5/18; B29C55/02; B29C61/06; C08G63/66; C08G63/672; B29K67/00; B29K105/02; B29L7/00; (IPC1-7): C08J5/18; B29C61/06

Next Patent: JPH044230