公开(公告)号：EP1372959B1

公开(公告)日：2009-04-15

申请号：EP02729391.9

申请日：2002-01-15

申请人： Hosokawa Yoko Co., Ltd.

发明人： IWASAKI, Toshiharu, c/oShowa Denko Pl.Prod.Co.,Ltd ,  EZAKI, Tomohiko, c/oShowa Denko Pl. Prod. Co.,Ltd ,  SAKATA, Akihiko, c/oShowa Denko Plast. Prod.Co.Ltd ,  OTAKE, Isao, c/oShowa Denko Plastic Prod. Co.,Ltd

IPC分类号： B32B27/32

CPC分类号： B32B27/32

摘要： One object of the present invention is to provide a polyethylene-base resin laminate having excellent properties in the transparency, blocking resistance, flexibility and the like, exhibiting heat resistance high enough to withstand a sterilization at 121 DEG C, and being greatly improved in the impact strength of seal part as compared with conventional laminates; in order to achieve the object, the present invention provide a laminate having at least an inner layer, an intermediate layer and an outer layer, wherein said inner layer comprises a resin material layer and an outer layer, wherein said inner layer comprises a resin material (A) containing a high-density polyethylene, said intermediate layer comprises a resin material (B) mainly comprising Polyethylene-Base Resin I which is an ethylene- alpha -olefin copolymer obtained by copolymerizing ethylene with an alpha -olefin having from 3 to 20 carbon atoms and which has the following physical properties (a) to (d), and said outer layer comprises a resin material (c) containing a high-density polyethylene: (a) the density is less than 0.920 g/cm , (b) the MFR is from 0.1 to 50 g/10 min, (c) the amount X (%by mass) of o-dichlorobenzene-soluble portion at 25 DEG C, the density d (g/cm ) and the MFR (g/10 min) satisfy the following relationship: X x(0.9300-d+0.008logMFR) +2.0 (d) the parameter Cb of the composition distribution is from 1.08 to 2.00.