used blown film grade polyethylene resin particles containing the appropriate amount of slippery agent, to ensure the opening of film.
2. Resin particles melt index (MI) can not be too large, the melt index (MI) too, then the viscosity of molten resin is too small, narrow range of processing, processing conditions difficult to control, poor film-forming resin is not easy to process film; In addition, melt index (MI) too narrow polymer molecular weight distribution, strength of the film worse. Therefore, it should be used melt index (MI) is smaller, and relatively broad molecular weight distribution of resin raw materials, not only can meet the performance requirements of film, but also ensures that the resin processing characteristics. Blown polyethylene film generally used in the melt index (MI) in the range of 2 ~ 6g/10min between the polyethylene material.