Method for preparing high temperature resistant film for protective films

Abstract

The invention discloses a method for preparing a high temperature resistant film for protective films. The method comprises the following steps: S1, weighing nano-barium titanate and 3-allyloxy-2-hydroxy-1-propanesulfonic acid sodium salt, putting in a magnetic stirrer, stirring and mixing to obtain a material A; S2, weighing low-density polyethylene, metallocene linear low-density polyethylene, tert-butyl methacrylate, oleamide, zinc stearate, azelaic acid di(2-ethylhexyl)ester and antioxidant, putting into a high-speed mixer, uniformly mixing, extruding and granulating in a twin-screw extruder to obtain a material B; S3, putting the material A, the material B and high-density polyethylene in an internal mixer, mixing and discharging to obtain mixed master-batches; and S4, feeding the mixed master-batches into a film blowing machine, and extruding and blowing a film. The film can endure local high temperature on the surface in damping to avoid the problems of crinkles even cracks whenbeing used as protective films of stamping parts.

Description

technical field [0001] The invention relates to the field of polyethylene films, in particular to a method for preparing a high-temperature-resistant film for a protective film. Background technique [0002] At present, in the factory production of automobiles, household appliances and other fields, the metal stamping forming process has been widely used and formed a very mature process. The metal stamping forming process is a manufacturing process that uses a metal stamping die to form a metal sheet into a workpiece with a three-dimensional shape. Stamping parts rely on presses and molds to apply external forces to sheets, strips, pipes, and profiles to produce plastic deformation or separation. , so as to efficiently and accurately obtain workpieces of required shape and size. [0003] In the process of metal plate stamping and forming, the processing environment has large tensile force, high friction force, local high temperature and other factors that cause the surface ...

AI Technical Summary

Problems solved by technology

[0003] In the process of metal plate stamping and forming, the processing environment has large tensile force, high friction force, local high temperature and other factors that cause the surface of the stamped product to be scratched, wrinkled or even cracked, which also reduces the service life of the mold. Therefore, in the stamping process Among them, a protective film must be applied to the metal stamping parts for protection

However, in many cases, the stamping and coating of metal stamping parts are carried out at the same time, which is limited by the strength and tensile properties of the general protective film, making the protective film easy to crack during the stamping process

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