HEAT-SHRINKABLE LAMINATED FILM, AND MOLDED ARTICLES, HEAT-SHRINKABLE LABELS AND CONTAINERS, MADE BY USING THE FILM

Title:

HEAT-SHRINKABLE LAMINATED FILM, AND MOLDED ARTICLES, HEAT-SHRINKABLE LABELS AND CONTAINERS, MADE BY USING THE FILM

Document Type and Number:

WIPO Patent Application WO/2006/051920

Kind Code:

A1

Abstract:

The invention provides a heat-shrinkable laminated film excellent in breakage resistance, stiffness, and shrink finish; and molded articles, heat-shrinkable labels, and containers, made by using the film. Specifically, a heat-shrinkable laminated film having a layer (A) constituted mainly of a polyester resin and a layer (B) constituted mainly of a polystyrene resin as the face and back layers or interlayers, in which the loss elasticity (E_A') of the resin constituting the layer (A) exhibits at least one peak within the range of 50 to 90&ring C and the storage elastic moduli thereof at 0 to 40&ring C satisfy the relationship: E_A'(0)/E_A'(40) < 1.2, while the storage elastic moduli of the resin constituting the layer (B) at 50&ring C and 90&ring C satisfy the relationships: E_B'(50) > 1.5 x 10⁸ Pa and E_B'(90) > 5.0 x 10⁷ Pa respectively, with the storage elastic modulus curves of E_A' and E_B' crossing each other and which exhibits a heat shrinkage of 30 to 60% in the direction of main shrinkage after the immersion in warm water at 80&ring C for 10 seconds and a heat shrinkage of ±5% or below in the direction perpendicular thereto in the range of 70 to 80&ring C.

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Inventors:

HIRUMA TAKASHI (JP)
YAMADA TAKEYOSHI (JP)
TANAKA YUKIHIRO (JP)
MIYASHITA YOU (JP)
TAKAGI JYUN (JP)

Application Number:

PCT/JP2005/020754

Publication Date:

May 18, 2006

Filing Date:

November 11, 2005

Export Citation:

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Assignee:

MITSUBISHI PLASTICS INC (JP)
HIRUMA TAKASHI (JP)
YAMADA TAKEYOSHI (JP)
TANAKA YUKIHIRO (JP)
MIYASHITA YOU (JP)
TAKAGI JYUN (JP)

International Classes:

B32B27/30; B29C61/06; B32B7/022; B32B7/027; B32B27/36; B65D25/36; B65D65/40; G09F3/04

Foreign References:

JP2002351332A	2002-12-06
JPS6141542A	1986-02-27
JP2004091712A	2004-03-25
JP2002052672A	2002-02-19
JPH11138708A	1999-05-25

Other References: