Aluminum-plated ternary copolymerized polypropylene casting film resin composition

Abstract

The invention relates to an aluminum-plated ternary copolymerized polypropylene casting film resin composition, which comprises the following raw materials by weight: 1000 parts of a ternary copolymerized polypropylene resin, 1.0-1.6 parts of an antioxidant 1, 0.5-1.0 part of an antioxidant 2, and 0.15-0.5 part of a halogen absorbent, wherein the ternary copolymerized polypropylene resin comprises5.5-10 wt% of 1-butene, 0.5-1.5 wt% of ethylene, and the balance of propylene. According to the present invention, the ternary copolymerized polypropylene composition has characteristics of excellentimpact strength, excellent rigidity and low n-hexane extract under the premise of meeting of the processing property, the aluminum plating property, the optical property and the thermal adhesive property of food-grade aluminum-plated films, and can completely meet the production requirements of high-end casting film packaging manufacturers on metalize cast polypropylene.

Description

technical field [0001] The invention belongs to the technical field of polymer material polypropylene resin, and in particular relates to a polypropylene resin composition specially used for manufacturing aluminized polypropylene casting film. Background technique [0002] Aluminum-coated polypropylene cast film (Metalize cast polypropylene; MCPP) is a kind of polypropylene film made by casting extrusion process and vacuum aluminum plating in the plastic industry. Compared with LLDPE, LDPE, HDPE, PET and other films, MCPP has lower cost, higher output, higher stiffness than PE film, excellent water vapor and odor barrier properties, and can meet general heat resistance, chemical resistance, resistance Grinding, oxygen resistance, moisture resistance, etc., are widely used in food packaging and other fields. [0003] In recent years, with the continuous development of foreign MCPP special materials, the rapid development of casting equipment technology, and the continuous de...

AI Technical Summary

Problems solved by technology

In the prior art, the ternary copolymerization method is usually used to manufacture MCPP special materials. During the polymerization, 2-3% comonomer 1-butene and ethylene and propylene are introduced into the copolymer. Usually, the ethylene content is higher than 1-butene. Due to the copolymerization The introduction of the monomer reduces the crystallization properties of the material, the melting point drops significantly, and the heat sealing performance is enhanced. However, the low molecular weight part of the copolymer often has a high ethylene content, which increases the content of low molecular random substances in the resin, resulting in product failure. Hexane extraction is consistently high, limiting its range of applications, especially in food packaging

[0005] In addition, MCPP special materials also require strict control of various additives, such as: slip agent, anti-blocking agent and antistatic agent, etc., to prevent migration and affect the quality of aluminized film. Therefore, MCPP has high requirements for raw materials. At present, The main grades on the market are FL7540L and FL7641L of TPC in Singapore, etc., and there are few domestic MCPP special materials that meet this condition

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