发明申请
- 专利标题: POLYLACTIC ACID-BASED FILM OR SHEET
- 专利标题(中): 基于聚氨酯的薄膜或薄片
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申请号: US13122076申请日: 2009-10-01
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公开(公告)号: US20110201746A1公开(公告)日: 2011-08-18
- 发明人: Shigeki Ishiguro , Hiroki Senda
- 申请人: Shigeki Ishiguro , Hiroki Senda
- 申请人地址: JP Ibaraki-shi, Osaka
- 专利权人: NITTO DENKO CORPORATION
- 当前专利权人: NITTO DENKO CORPORATION
- 当前专利权人地址: JP Ibaraki-shi, Osaka
- 优先权: JP2008-257383 20081002
- 国际申请: PCT/JP2009/067176 WO 20091001
- 主分类号: C08L67/04
- IPC分类号: C08L67/04 ; B29C67/24 ; C08L27/18 ; C08L23/26
摘要:
A method of producing a polylactic acid based film or sheet with improved heat resistance and comprised of a resin composition containing a polylactic acid according to a melt film forming method, wherein the resin composition comprises polylactic acid (A), an acidic functional group-denatured olefin based polymer (B) containing an acidic functional group, and having an acid number of 10-70 mg KOH/g and a weight average molecular weight of 10,000-80,000, and a tetrafluoroethylene based polymer (C), which method comprises performing melt film formation at a temperature of the resin composition between the crystallization temperature (Tc) in a decreasing temperature process of the resin composition +15° C. and the melting temperature (Tm) in a raising temperature process −5° C., or solidifying the resin composition melt-formed in a film state by cooling after a temperature controllable step at crystallization temperature (Tc) in the decreasing temperature process ±10° C.