JP2003080649A5 - - Google Patents

Claims (9)

A laminate comprising at least three layers, wherein both surface layers are composed of a polymer material having a surface resistivity of 1 × 10 ¹⁴ Ω or more, and the intermediate layer is potassium of ethylene / unsaturated carboxylic acid copolymer It is composed of an ionomer or a mixture of the potassium ionomer and a thermoplastic polymer, and at least one surface layer has a 10% decay time of 20 seconds or less at an applied voltage of +5000 V measured under an atmosphere of 23 ° C. and 50% relative humidity. A laminate characterized by being. The laminate according to claim 1 , wherein the potassium ionomer has an unsaturated carboxylic acid content of 10 to 30% by weight and a neutralization degree of 60% or more. The laminate according to claim 1 or 2 , wherein at least one of the surface layers is composed of a polymer material selected from ethylene polymers produced in the presence of a zinc ionomer and a metallocene catalyst. body. The laminate according to any one of claims 1 to 3, wherein an adhesive layer and / or a recovery layer is provided between at least one surface layer and the intermediate layer. The laminate according to any one of claims 1 to 4 , wherein the thickness ratio of the total thickness of the surface layer and the adhesive layer and / or the recovery layer to the intermediate layer thickness is in the range of 0.1 to 100. It is a film, a sheet | seat, a bag, or a multilayer container, The laminated body in any one of Claims 1-5. The laminate according to claim 6 , which is used for packaging. A multilayer container comprising at least three layers, wherein the outermost layer and the innermost layer are made of a polymer material having a surface resistivity of 1 × 10 ¹⁴ Ω or more, and the intermediate layer is an ethylene / unsaturated carboxylic acid copolymer Multilayers characterized in that at least one of the outermost layer and the innermost layer has a 10% decay time of 20 seconds or less at an applied voltage of +5000 V measured in an atmosphere of 23 ° C. and 50% relative humidity. container. The multilayer container according to claim 8 , wherein the multilayer container is obtained by blow molding.