公开(公告)号：EP1880844B1

公开(公告)日：2011-07-13

申请号：EP06732645.4

申请日：2006-05-12

申请人： Tohcello Co., Ltd.

发明人： Honda, Hiroshi c/o Tohcello Co., Ltd. ,  Tsukada, Chikara c/o Oji Paper Co., Ltd. ,  Kubo, Naoki c/o Oji Paper Co., Ltd. ,  Shimizu, Yoshihiro c/o Oji Paper Co., Ltd.

IPC分类号： B32B27/32 ,  B41M5/382 ,  B41M5/50 ,  B41M5/52

CPC分类号： B32B27/06 ,  B32B7/12 ,  B32B27/32 ,  B32B2255/10 ,  B32B2307/518 ,  B32B2323/10 ,  B32B2375/00 ,  B41M5/41 ,  B41M2205/02 ,  B41M2205/32 ,  Y10T428/256 ,  Y10T428/31587 ,  Y10T428/31692 ,  Y10T428/31855

摘要： Disclosed is a biaxially stretched multilayer polypropylene film wherein a front layer and back layer composed of a propylene polymer (a1) are respectively arranged on both sides of a biaxially stretched polypropylene film base layer (B) which is composed of a propylene polymer composition (A) obtained by adding an inorganic compound powder (a2) to the propylene polymer (a1). This biaxially stretched multilayer polypropylene film is characterized in that the front and back layers have a surface roughness (three-dimensional center plane average roughness SRa) of less than 0.08 μm and a glossiness (incident angle: 60 degrees) of not less than 114%, and the multilayer polypropylene film has a total light transmittance of not more than 20% and a density of 0.40-0.65 g/cm3.

公开(公告)号：EP1880844A1

公开(公告)日：2008-01-23

申请号：EP06732645.4

申请日：2006-05-12

申请人： Oji Paper Company Limited ,  Tohcello Co., Ltd.

发明人： Honda, Hiroshi c/o Tohcello Co., Ltd. ,  Tsukada, Chikara c/o Oji Paper Co., Ltd. ,  Kubo, Naoki c/o Oji Paper Co., Ltd. ,  Shimizu, Yoshihiro c/o Oji Paper Co., Ltd.

IPC分类号： B32B27/32

CPC分类号： B32B27/06 ,  B32B7/12 ,  B32B27/32 ,  B32B2255/10 ,  B32B2307/518 ,  B32B2323/10 ,  B32B2375/00 ,  B41M5/41 ,  B41M2205/02 ,  B41M2205/32 ,  Y10T428/256 ,  Y10T428/31587 ,  Y10T428/31692 ,  Y10T428/31855

摘要： Disclosed is a biaxially stretched multilayer polypropylene film wherein a front layer and back layer composed of a propylene polymer (a1) are respectively arranged on both sides of a biaxially stretched polypropylene film base layer (B) which is composed of a propylene polymer composition (A) obtained by adding an inorganic compound powder (a2) to the propylene polymer (a1). This biaxially stretched multilayer polypropylene film is characterised in that the front and back layers have a surface roughness (three-dimensional centre plane average roughness SRa) of less than 0.08µm and a glossiness (incident angle: 60 degrees) of not less than 114%, and the multilayer polypropylene film has a total light transmittance of not more than 20% and a density of 0.40-0.65 g/cm 3 .

摘要翻译： 公开了一种双轴拉伸多层聚丙烯膜，其中由丙烯聚合物（a1）组成的前层和背层分别设置在由丙烯聚合物组合物（A）组成的双轴拉伸聚丙烯膜基层（B）的两侧 ）通过向丙烯聚合物（a1）中添加无机化合物粉末（a2）而得到。 该双轴拉伸多层聚丙烯膜的特征在于前后层具有小于0.08μm的表面粗糙度（三维中心面平均粗糙度SRa）和光泽度（入射角度：60度）不小于114％ ，多层聚丙烯膜的总透光率为20％以下，密度为0.40〜0.65g / cm 3。