Plastic substrate film for food packing and machining process thereof
A plastic base material and food packaging technology, applied in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of sealing pollution, poor sealing performance, poor barrier performance, etc., and achieve good heat sealing performance, barrier properties and gas Good tightness and high heat sealing strength
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[0014] The present invention will be further explained below in conjunction with specific examples. In the following examples, the manufacturing equipment of the plastic substrate film for food packaging is adopted: a three-layer co-extrusion traction rotary film blowing unit, consisting of three extruders, a die head, a shaping cage, a set of traction auxiliary machines, and a winder and other components; testing equipment are used: GBL-L electronic tensile testing machine and MXD-01 friction coefficient meter.
[0015] The raw materials are based on the ratio of LDPE30% for the inner layer, 20% for linear low-density polyethylene LLDPE, and 50% for metallocene linear polyethylene mLLDPE; the ratio for the middle layer is 40% for low-density polyethylene LDPE and 60% for linear low-density polyethylene; The outer layer is low-density polyethylene 40% LDPE, linear low-density polyethylene LLDPE 60%, the mass ratio between the inner layer, the middle layer and the outer layer i...
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