Biaxially oriented polypropylene release film production process

Abstract

The invention discloses a biaxially oriented polypropylene release film production process and relates to the technical field of film production. The biaxially oriented polypropylene release film production process comprises the step of material mixing, specially mixing polypropylene and functional masterbatch and putting a mixture into an extruder; the step of extruding, specially forming a embryonic three-layer structure film, wherein the extruding temperature is 230 DEG C-250 DEG C; the step of piece casting, specifically feeding the embryonic film to a piece casting machine, wherein the temperature of piece casting rollers and cooling rollers of the piece casting machine is 30 DEG C-45 DEG C; the step of stretching, specifically longitudinally stretching a cast piece after the piece ispreheated, wherein the longitudinal stretching temperature is 135 DEG C-150 DEG C, the longitudinal stretching multiplying power is 1:6.5-1:7.0, then, shaping and transverse stretching after preheating are carried out, the transverse stretching temperature is 160 DEG C-200 DEG C, and then through traction cooling, thickness measuring, rolling and aging treatment, the film with a needed size is obtained. According to the biaxially oriented polypropylene release film production process, by setting process parameters, the film strength is obviously increased, the elongation at break is obviouslyreduced, the film has the advantages of being resistant to the high temperature and easy to peel, and the strength and the flatness of release films for fishing poles, brassies and other sporting goods after being cured are guaranteed.

Description

technical field [0001] The invention relates to the technical field of film production, in particular to a production process for a biaxially stretched polypropylene release film. Background technique [0002] Sporting goods such as fishing rods and golf clubs are usually made of carbon fiber or glass fiber impregnated with epoxy resin or phenolic resin, then wrapped on the mold, and then wrapped with a layer of film with release function, placed in an oven, and passed through the corresponding temperature Gradient and time control make the thermosetting resin epoxy resin or phenolic resin solidify, withdraw from the mold to remove the release film wrapped outside, and make the rod body blank. The existing technology mainly uses cellophane commonly known as cellophane. Cellophane is a film made from natural fibers such as cotton pulp and wood pulp by gluing, and has the following defects during use: [0003] 1. Compared with the release film, cellophane has a higher density...

AI Technical Summary

Problems solved by technology

[0004] 2. In the process of taking off the cellophane, it is very easy to cause scratches to the rod body, and the rod body needs to be polished to increase the production process;

[0005] 3. The process of removing the cellophane during the production process of fishing rods will generate serious dust, which will endanger the health of employees

[0006] Some companies use release film instead of cellophane, but there is a problem that the strength of the rod body cannot be guaranteed due to the extensibility of the release film

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