公开(公告)号：US20080200637A1

公开(公告)日：2008-08-21

申请号：US11966938

申请日：2007-12-28

申请人： Yoshio INOUE ,  Hexig Alata ,  Taizo Aoyama

发明人： Yoshio INOUE ,  Hexig Alata ,  Taizo Aoyama

IPC分类号： C08G63/00

CPC分类号： C08J5/18 ,  C08J2300/16 ,  C08J2367/04

摘要： A biodegradable sheet or film that is excellent in environmental compatibility accompanied by less time dependent alteration following manufacture of the sheet, having stable flexibility is provided, which can be degraded by a microorganism or the like, and thus can be easily disposed after use. A biodegradable resin sheet which is constituted with a biodegradable (3-HA) copolymer, wherein the rate of change of the tensile elongation with respect to the change in crystallinity (%) from day 1 to day 30 after manufacturing the sheet represented by the formula (1): {[(tensile elongation (%) after a lapse of 1 day following manufacture)−(tensile elongation (%) after a lapse of 30 days following manufacture)]/[(crystallinity (%) after a lapse of 30 days following manufacture)−(crystallinity (%) after a lapse of 1 day following manufacture)]} is equal to or less than 20, and the tensile elongation after a lapse of 60 days following manufacture of the sheet is equal to or greater than 100(%).

摘要翻译： 提供环境友好性优异的生物降解性片材或薄膜，伴随着片材制造后的随时间变化的变化，具有稳定的柔韧性，其可以被微生物等降解，因此可以在使用后容易地放置。 由生物降解性（3-HA）共聚物构成的生物降解性树脂片，其中，在制造由式（1）表示的片材之后，从第1天到第30天的拉伸伸长率相对于结晶度变化率（％）的变化率 （1）：{[（制造后经过1天后的拉伸伸长率（％）） - （制造后经过30天后的拉伸伸长率（％）]] / [（经过30后的结晶度 制造后的几天） - （制造后经过1天后的结晶度（％）]]}等于或小于20，制造片材经过60天后的拉伸伸长率等于或大于 100（％）。