Patent ID: 6977105
Filing Date: 2005-12-20
Classification: A61L,A61M,B32B,C08C,C08L,F16L,Y10T

Abstract:
1. A tube consisting of an inner, intermediate and outer resin layer, wherein the inner and outer layers are made of resin (II) and the intermediate layer is formed of resin (I), wherein resin (I) comprises: resin (II) comprises: wherein resin (II), which forms the outer layer contains 45 to 70 mass % of the polypropylene resin and 55 to 30 mass % of the at least one hydrogenated copolymer, wherein resins (I) and (II) do not contain random copolymer, wherein said tube has (i) a tube/tube a shear peel strength of less than 35 N, as measured on a stuck or adhered portion of the outermost layer of one said tube against the outermost layer of another said tube after autoclave sterilization at 121° C. for 20 minutes, and has (ii) a tube/film 180° peel strength of less than 10 N, as measured on a stuck or adhered portion of the outermost layer of said tube and an innermost polypropylene layer of a sterilization bag, by the test method defined in JIS K6854 after autoclave sterilization at 121° C. for 20 minutes, wherein said resin (I) forms a thick substrate layer and resin (II) forms a connection layer thinner than the substrate layer, the connection layer being capable of connecting to another tube or article by hot melt bonding, solvent bonding or adhesive bonding, wherein said tube can form an arc having a radius of 20 mm without kinking, thereby the tube showing good resistance against tube/tube sticking and tube/film sticking after high-pressure steam sterilization.