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1. 发明申请

WO2009130033A1 PROCESS FOR MAKING OPAQUE POLYESTER FILM 审中-公开
标题翻译：制作OPAQUE聚酯薄膜的方法
公开(公告)号：WO2009130033A1
公开(公告)日：2009-10-29
申请号：PCT/EP2009/002986
申请日：2009-04-20
申请人： SAUDI BASIC INDUSTRIES CORPORATION , BASHIR, Zahir , WARD, Ian, Macmillan , THOMPSON, Glen, Peter , UNWIN, Anthony, Paul
发明人： BASHIR, Zahir , WARD, Ian, Macmillan , THOMPSON, Glen, Peter , UNWIN, Anthony, Paul
IPC分类号： C08J5/18 , C08L67/00 , B65D88/16 , D01D5/42
CPC分类号： D01F6/62 , B29C47/0004 , B29C47/0021 , B29C47/0057 , B29C47/043 , B29C47/88 , B29C47/8805 , B29C47/8815 , B29C47/884 , B29C47/8845 , B29C47/92 , B29C55/06 , B29C55/12 , B29C55/14 , B29C55/143 , B29C71/02 , B29C2071/022 , B29C2947/92742 , B29C2947/92752 , B29C2947/9278 , B29K2067/00 , B29K2067/003 , C08J5/18 , C08J2367/02 , D01D5/426 , Y10T428/1345 , Y10T442/30
摘要： The invention relates to a process for making an opaque and glossy film from a thermoplastic polyester composition, comprising the steps of a) extruding the polyester composition through a slot die, and quenching to form a substantially amorphous film having a crystallinity of at most 5%; b) rapidly heating the amorphous film to a drawing temperature in the range from T g to (T g + 50) °C while applying a draw ratio in the range of from λ initiation to λ max . in longitudinal direction, and a drawing rate of at least 1 m/min to form an oriented film showing stress-whitening, wherein λ initiation is the draw ratio at which a transfer from a transparent product to a stress-whitened product occurs and λ max . is the draw ratio at which failure of the stress whitened film occurs; and c) heat-setting the oriented stress-whitened film; the thermoplastic polyester composition substantially consisting of at least one crystallisable polyester derived from at least one aliphatic diol and at least one aromatic dicarboxylic acid. With this process it is possible to make a unitary, glossy, opaque film from a polyester composition that does not contain void-forming additives like high amounts of fine pigment particles or dispersed non-miscible polymer particles. The film obtained also has very good mechanical properties. It is a further advantage that the process can be performed continuously on conventional extrusion and stretching equipment used for making transparent film from polyesters. The invention also relates to an opaque polyester film obtainable by said process.
摘要翻译：本发明涉及一种由热塑性聚酯组合物制造不透明和光泽的薄膜的方法，包括以下步骤：a）通过槽模挤出聚酯组合物，并淬火以形成结晶度至多为5％的基本上无定形的薄膜， ; b）在Tg至（Tg + 50）℃的范围内将非晶膜快速加热到拉伸温度，同时施加拉伸比在开始了？最大。并且拉伸速度为至少1m / min，以形成显示应力增白的取向膜，其中，起始是从透明产品转移到应力白化产品的拉伸比，λmax。是发生应力增白膜失效的拉伸比; 和c）热定形应力增白膜; 所述热塑性聚酯组合物基本上由至少一种衍生自至少一种脂族二醇和至少一种芳族二羧酸的可结晶聚酯组成。通过该方法，可以由不含空隙形成添加剂如大量细颜料颗粒或分散的不可混溶聚合物颗粒的聚酯组合物制成单一的，有光泽的不透明膜。获得的膜也具有非常好的机械性能。进一步的优点是可以在用于从聚酯制造透明膜的常规挤出和拉伸设备上连续进行。本发明还涉及通过所述方法可获得的不透明聚酯膜。

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