Title:
THERMALLY SHRINKABLE MULTILAYER SHEET
Document Type and Number:
WIPO Patent Application WO/2007/032306
Kind Code:
A1
Abstract:
Disclosed is a thermally shrinkable multilayer sheet having at least three layers composed of both surface layers and an interlayer. Each of the surface layers comprises an ethylene-α-olefin copolymer having a density falling within a specified range. The interlayer comprises a composition comprising an ethylene-α-olefin copolymer having a density falling within a specified range and at least one resin selected from a high-pressure low-density polyethylene, an ethylene-vinyl acetate copolymer, an ethylene-aliphatic unsaturated carboxylic acid copolymer, and an ethylene-aliphatic unsaturated carboxylic acid ester copolymer, in an amount of 50 to 100 wt%. The thermally shrinkable multilayer sheet has the following characteristics (1) and (2): (1) the resin constituting the surface layers has the ratio of the amount of melting heat at 100ºC or lower relative to the total amount of melting heat of 40 to 75% in the second melting behavior in differential scanning calorimetry; and (2) the film has the ratio of the amount of melting heat at 100ºC or lower relative to the total amount of melting heat of 45% or more and the ratio of the amount of melting heat at 110ºC or lower relative to the total amount of melting heat of 70% or more in the second melting behavior in differential scanning calorimetry. The film enables the formation of a packaged article having a beautiful appearance without the need of decreasing the packaging speed. A container formed from the film shows no deformation even after heated with a microwave oven and no film-film cohesion.
Inventors:
YOSHINO MASAYUKI (JP)
MATSUKI YUTAKA (JP)
MATSUKI YUTAKA (JP)
Application Number:
PCT/JP2006/317971
Publication Date:
March 22, 2007
Filing Date:
September 11, 2006
Export Citation:
Assignee:
ASAHI KASEI LIFE & LIVING CORP (JP)
YOSHINO MASAYUKI (JP)
MATSUKI YUTAKA (JP)
YOSHINO MASAYUKI (JP)
MATSUKI YUTAKA (JP)
International Classes:
B32B27/32; B29C61/06
Foreign References:
| JP2001001468A | 2001-01-09 | |||
| JPH09216956A | 1997-08-19 | |||
| JP2003260764A | 2003-09-16 | |||
| JPH0858042A | 1996-03-05 | |||
| JPH0890737A | 1996-04-09 | |||
| JP2001145987A | 2001-05-29 | |||
| JP2002200672A | 2002-07-16 | |||
| JP2001150600A | 2001-06-05 | |||
| JP2001151915A | 2001-06-05 | |||
| JP2002120343A | 2002-04-23 |
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