Title:
低温耐衝撃性ポリアミド系延伸配向多層フィルムおよびその製造方法
Document Type and Number:
Japanese Patent JP4931319
Kind Code:
B2
Abstract:
A stretch-oriented multilayer film suited for use as a freeze packaging material, a deep drawing packaging material, a vertical pillow packaging material, etc., is provided as a stretch-oriented multilayer film, comprising at least three layers including a surface layer (a) comprising a thermoplastic resin, an intermediate layer (b) comprising a polyamide resin and a surface layer (c) comprising a sealable resin, said multilayer film exhibiting an impact energy of at least 1.5 Joule at a conversion thickness of 50 mum at -10° C. The multilayer film is produced through an inflation process using water having a large capacity as a cooling and a heating medium and including a combination of a high degree of stretching and a high degree of relaxation heat treatment not exercised heretofore.
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Inventors:
Takahisa Ueyama
Tadayoshi Ito
Takeo Azuma
Tadayoshi Ito
Takeo Azuma
Application Number:
JP2002503539A
Publication Date:
May 16, 2012
Filing Date:
June 22, 2001
Export Citation:
Assignee:
Kureha Co., Ltd.
International Classes:
B32B27/34; B65D65/40; B29C48/10; B29C55/02; B29C55/28; B29C71/02; B32B27/08; B29C35/04; B29K77/00; B29L7/00; B29L9/00; B32B37/15
Domestic Patent References:
| JPH05294357A | 1993-11-09 | |||
| JPH08230035A | 1996-09-10 | |||
| JPH081878A | 1996-01-09 | |||
| JPH11300914A | 1999-11-02 | |||
| JP2000037828A | 2000-02-08 | |||
| JPH04185322A | 1992-07-02 |
Attorney, Agent or Firm:
Akio Saruwatari
Hisashi Hatano
Shunguchi Sekiguchi
Junichi Furukawa
Hisashi Hatano
Shunguchi Sekiguchi
Junichi Furukawa