multi-layer film prepared from high impact resistance polyethylene and low pressure, high density ziegler natta catalyzed polyethylene blends

摘要

Summary “Multilayer film prepared from high impact resistance polyethylene and low pressure, high density ziegler natta catalyzed polyethylene blends” is a multilayer film prepared from high impact resistance polyethylene (polyethylene hi); a ziegler natta catalyst polyethylene (z / n polyethylene) and a low density, high pressure polyethylene (polyethylene 1d) with the requirements that i) at least one outer layer consist essentially of polyethylene hi and ii) at least one core layer comprises a polyethylene z / ne said polyethylene ld blend. hi polyethylene has a density of about 0.915 to 0.930 g / cc and a standardized impact resistance of at least 300 g / thousand. the amount of hi polyethylene is 30 to 55% by weight (based on the combined weights of the hi + zn + 1d polyethylenes). The films of this invention are readily prepared on blown film equipment and provide an excellent balance of mechanical properties.