Polypropylene film raw material

Abstract

The invention relates to a polypropylene film raw material which is characterized in that the formulation of the raw material comprises (counting by weight portions): 55 to 90 portions of copolymerization polypropylene resin, 10 to 39 portions of polyolefine elastomer resin, and 0 to 9 portions of opening slip agent. The invention is characterized in that: by adopting a polyolefine elastomer resin which has good compatibility and affinity with the polypropylene and arranging giant molecule randomly and indefinitely under an abruptly cooling external condition, the film has good toughness.

Description

technical field [0001] The invention relates to a polypropylene film, in particular to a raw material suitable for producing the polypropylene film by a water cooling method. Background technique [0002] There are two main cooling processes in the production process of polypropylene film. One is the casting polypropylene film produced by casting equipment. The polypropylene melt extruded from the die head of the extruder directly flows to the cooling system with internal cooling layer. The other is the water cooling method, the polypropylene melt flowing out of the die depends on the air ring around the die lip of the die, and then the cooling water jacket is quenched after a short distance outside the film bubble. The existing polypropylene film raw material formula adopts the above two processing techniques to produce usually good film transparency, but high stiffness, softness and poor impact resistance. Contents of the invention [0003] The object of the present inv...

AI Technical Summary

Problems solved by technology

The existing polypropylene film raw material formula adopts the above two processing techniques to produce the film, which usually has good transparency, but has high stiffness, poor softness and impact resistance.