发明公开
- 专利标题: HEAT-SEALABLE LAYERED POLYPROPYLENE RESIN FILM AND PACKAGE
- 专利标题(中): 热密封,分层的聚丙烯树脂片材与包装
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申请号: EP05719265申请日: 2005-02-18
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公开(公告)号: EP1728626A4公开(公告)日: 2008-04-16
- 发明人: KAWAI KENJI , OOGI HIROKAZU , ODA NAONOBU , NAKAYA ISHI , IMAI TOORU , SAKO YUKA
- 申请人: TOYO BOSEKI
- 专利权人: TOYO BOSEKI
- 当前专利权人: TOYO BOSEKI
- 优先权: JP2004092306 2004-03-26
- 主分类号: B32B27/32
- IPC分类号: B32B27/32 ; B65D30/02 ; B65D65/40
摘要:
A heat-sealable layered polypropylene resin film which has a heat-sealing strength and heat-sealing energy sufficient to package weighty articles such as vegetables and fruits and has satisfactory stiffness; and a package obtained with the film. The heat-sealable polypropylene resin film comprises a laminate of three or more layers comprising a base layer made of a crystalline polypropylene resin, an interlayer, and a fusion-bondable layer having a melting point of 150°C or lower, and is characterized in that the product of tensile moduli (GPa) of the film as measured in directions perpendicular to each other is in the range of 3.1 to 6.0 (GPa) and that the sealing energy of the film sealed so as to have a heat-sealing strength of 8 N/15 mm or higher is 11 N.cm/15 mm or higher.
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