Aluminum-plated propylene and butylene co-polypropylene tape casting membrane material and preparation method thereof

Abstract

The invention discloses an aluminum-plated propylene and butylene co-polypropylene tape casting membrane material. The preparation raw materials include polypropylene resin, an antioxidant and a halogen absorbent, wherein the polypropylene resin is propylene and butylene co-polypropylene resin and is prepared by adopting the following method: by taking propylene as a raw material and 1-butene as a copolymerization monomer, copolymerizing in a circular tube reactor to obtain propylene and butylene co-polypropylene resin, wherein the reaction temperature is at 70+ / -1DEG C, the reaction pressure is under 3.4-3.8MPa, the concentration of hydrogen is 800-1500ppm, and the concentration of 1-butene is 1%-5%. The invention further discloses a preparation method of the tape casting membrane material. An aluminum-plated tape casting membrane prepared by the tape casting membrane material has good processability, optical performance, mechanical performance and aluminum plating performance, and the production requirement of a tape casting membrane packaging factory on the aluminum-plated tape casting membrane can be met.

Description

technical field [0001] The invention relates to an aluminized polypropylene cast film material, in particular to an aluminized acrylic butyl copolymer polypropylene cast film material. The invention also relates to the preparation method of the casting film material. Background technique [0002] Cast polypropylene film (cast polypropylene; CPP) is a polypropylene (PP) film produced by a casting extrusion process in the plastics industry. According to different uses, it can be divided into general CPP (General CPP, GCPP for short) film, metalized CPP (Metalize CPP, MCPP for short) film and retort CPP (Retort CPP, RCPP for short) film, etc. Compared with LLDPE, LDPE, HDPE, PET, PVG and other films, CPP has lower cost, higher output, higher stiffness than PE film, excellent water vapor and odor barrier properties, and can be used as composite base film. It can be metallized, and it is generally used as food and commodity packaging and outer packaging. Due to its unique prop...

AI Technical Summary

Problems solved by technology

However, after introducing ethylene into the copolymer segment, while improving the transparency of polypropylene, it also reduces the rigidity of the product

At the same time, the low molecular weight part of ethylene-propylene random copolymerized polypropylene often has too high ethylene content, thereby increasing the content of low molecular random substances in the product, resulting in a high n-hexane extract of the product, which limits its application range, especially Food packaging field

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