公开(公告)号：US5948544A

公开(公告)日：1999-09-07

申请号：US8829

申请日：1998-01-20

申请人： Kyeong Ah Kim ,  Young Bum Kim ,  Young Seok Kim ,  Yong Cheol Shin ,  Boung Kun Son

发明人： Kyeong Ah Kim ,  Young Bum Kim ,  Young Seok Kim ,  Yong Cheol Shin ,  Boung Kun Son

IPC分类号： B29C47/06 ,  B29K67/00 ,  B29L9/00 ,  B32B27/36 ,  B32B27/06

CPC分类号： B32B27/36 ,  Y10T428/31786

摘要： The present invention relates to a polyester multilayer sheet having excellent impact strength and weatherability, and relates to a process for preparing the same.The present invention relates to coextrude more than 2 kinds of copolyester resins, composed of 5-99 mol % of ethyleneterephthalate and 1-95 mol % of ethylenenaphthalate or ethyleneisophthalate, having at least 0.005 dl/g of inherent viscosity difference each others, on 3-7 layers of multilayer sheet which had been arrayed by turns with high viscosity resin and low viscosity resin, and its outer layer has the higher inherent viscosity than the inner layer.Polyester multilayer sheet of the present invention is suitable for window glass substitute of building, transparent agricultural intercepting material and clothing material.

摘要翻译： 本发明涉及具有优异的冲击强度和耐候性的聚酯多层片材，并涉及其制备方法。 本发明涉及共挤出2种以上的共聚酯树脂，其由5-99摩尔％的对苯二甲酸乙二醇酯和1-95摩尔％的邻苯二甲酸乙二醇酯或间苯二甲酸乙二醇酯组成，其具有至少0.005dl / g的特性粘度彼此差异，3 -7层多层片材，其高粘度树脂和低粘度树脂轮流排列，其外层具有比内层更高的固有粘度。 本发明的聚酯多层片材适用于建筑物，透明农业拦截材料和服装材料的窗玻璃替代品。