Title:
HEAT SHRINKABLE FILM
Document Type and Number:
Japanese Patent JP3496794
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain the subject film capable of manifesting excellent rigidity, shrinkability, hot water fusibility and impact resistance by using a composition composed of a specific elastomeric segment-containing block copolymer and other specific polymers.
SOLUTION: This heat shrinkable film has 7,000-80,000kg/cm2 tensile elastic modulus in the orienting direction and 15-80% heat shrinkage percentage at 80°C and is obtained by orienting a block copolymer composition prepared by compounding (A) a block copolymer having a plastic polymer segment and an elastomeric polymer segment at (65/35) to (90/10) weight ratio of (M1) a vinyl aromatic hydrocarbon and (M2) a conjugated diene and further peaks of tan δ present in respective temperature regions of 35-70°C and 90-125°C with (B) a block copolymer which has a polymer block consisting essentially of the component M1 and a polymer block consisting essentially of the component M2 at (65/35) to (90/10) weight ratio or (10/90) to (65/35) weight ratio of the components M1 to M2 and is other than the component A or a (non)rubber- modified styrene-based copolymer so as to provide (80/20) to (20/80) weight ratio of the components A/B.
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Inventors:
Nobuaki Kubo
Susumu Hoshi
Hisashi Nagashima
Susumu Hoshi
Hisashi Nagashima
Application Number:
JP33785196A
Publication Date:
February 16, 2004
Filing Date:
December 18, 1996
Export Citation:
Assignee:
Asahi Kasei Chemicals Corporation
International Classes:
B65D65/40; B29C61/06; C08J5/18; C08L53/02; B29K9/00; B29K105/02; B29L7/00; (IPC1-7): C08J5/18; C08L53/02
Domestic Patent References:
| JP60224522A | ||||
| JP60224521A | ||||
| JP1045858A | ||||
| JP1058540A | ||||
| JP60224520A |
Attorney, Agent or Firm:
Kazuo Watanabe