申请人:KUREHA KAGAKU KOGYO KABUSHIKI KAISHA
公开号:EP0217069A1
公开(公告)日:1987-04-08
Disclosed herein is a smokable food-packaging film comprising at least one layer of a mixture of 45 to 90 wt% polyamide. 10 to 55 wt% copolymer of α-olefin and vinyl alcohol, and 5 to 30 wt% polyolefin, in which the mixture falls in the pantagonal range defined in Figure 1 by linear lines connecting the pomts A, B, C, D and E, respectively, said layer having the properties of a permeability to 50 % concentration of methanol of not less than 200 g m2.day.atm at a temperature of 60C and a relative humidity of 0 % and an oxygen gas-permeability of not more than 50 cc/m2.day.atm at a temperature of 30C and a relative humidity of 60 %, and a water vapor-transmission rate of not more than 70 g m2.day at a temperature of 40°C and a relative humidity of 90 %.
本发明公开了一种可烟熏食品包装薄膜,该薄膜至少包含一层由 45 至 90 wt% 聚酰胺的混合物、10 至 55 wt% α-烯烃和乙烯醇的共聚物以及 5 至 30 wt% 聚烯烃组成的混合物。10 至 55 wt% α-烯烃和乙烯醇的共聚物,以及 5 至 30 wt% 聚烯烃的混合物,其中该混合物属于图 1 中分别由连接 A、B、C、D 和 E 层的直线所定义的泛边形范围,所述层具有以下特性:在温度为 60C 和相对湿度为 0% 的条件下,对浓度为 50% 的甲醇的渗透率不小于 200 g m2.在温度为 60°C 和相对湿度为 0% 时,氧气渗透率不超过 50 cc/m2.day.atm;在温度为 40°C 和相对湿度为 90% 时,水蒸气透过率不超过 70 g m2.day。