发明公开
- 专利标题： METHODS FOR LOWERING MELT VISCOSITY AND IMPROVING HEAT-SEALABILITY OF POLYESTER AND FOR MANUFACTURING A HEAT-SEALED CONTAINER OR PACKAGE
- 专利标题（中）： 程序对熔体粘度的降低与提高热封性聚酯和的用于生产热密封容器
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申请号： EP15740565.5申请日： 2015-01-22
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公开(公告)号： EP3097143A1公开(公告)日： 2016-11-30
- 发明人: NEVALAINEN, Kimmo , RIBU, Ville , RÄSÄNEN, Jari , KYLLIÄINEN, Outi , ROSLING, Ari , KHAJEHEIAN, Mohammad , KUUSIPALO, Jurkka , KOTKAMO, Sami , TOUMINEN, Mikko
- 申请人： Stora Enso Oyj
- 申请人地址： P.O. Box 309 00101 Helsinki FI
- 专利权人： Stora Enso Oyj
- 当前专利权人： Stora Enso Oyj
- 当前专利权人地址： P.O. Box 309 00101 Helsinki FI
- 代理机构： Lindberg, Berndt Åke
- 优先权： SE1400034 20140124
- 国际公布： WO2015110980 20150730
- 主分类号： C08J7/18
- IPC分类号： C08J7/18 ; B29C35/08 ; B29C71/04 ; B32B27/10 ; B65D65/38
摘要：
The invention relates to methods for lowering the melt viscosity and thereby improving heat-sealability of a polyester. The invention also relates to a method for manufacturing a heat-sealed container or package from fibrous-based, polyester-coated packaging material, and a method for heat-sealing polyester. The solution according to the invention is subjecting polyester to electron beam (EB) radiation. The lowered melt viscosity allows a lower heat-sealing temperature, and permits sealing of polyester to an uncoated fibrous surface. The preferred polyester for the invention is polylactide, as such or as blended with another polyester.
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