| abstract |
The invention provides the composition of being suitable for stretching cover, its preparation method and the goods be made up of it.There is according to multilayer film of the present invention the thickness of at least 3 Mills, it comprises at least one internal layer and two skins, wherein internal layer comprises the polyethylene and ethylene copolymers of at least 50wt%, polyethylene and ethylene copolymers have be less than 2 grams/10 minutes melt index, be less than or equal to 0.910g/cmn 3 density, be less than 120 joule/gram total melting heat and be less than 5 joule/gram higher than the melting heat of 115 DEG C, total melting heat of internal layer is less than the melting heat of any layer in two skins, and wherein when being stretched to 100% percentage elongation multilayer film there is the elastic recovery rate of at least 40%. |