Preparation method of medical transparent polypropylene material

Abstract

The invention relates to the technical field of polypropylene, in particular to a preparation method of a medical transparent polypropylene material. The medical transparent polypropylene material is prepared from the following raw materials in parts by weight: 100 parts of homo-polypropylene resin, 0.2-0.4 part of a transparent nucleating agent, 2-6 parts of phthalate, 7-15 parts of a toughening agent, 6-28 parts of expansible graphite, 1-4 parts of a halogen-free flame retardant, 0.3-1.8 parts of a coupling agent, 0.3-2.4 parts of an antistatic agent, 65 parts of a curing agent, 10-30 parts of a coloring agent, 0.3-0.6 part of an antioxidant, 0.4-1.5 parts of lubricating grease, 3-5 parts of a stabilizer and 10-40 parts of low-dielectric-loss glass fiber. The medical transparent polypropylene material is excellent in oxidation resistance, has good antistatic property, is convenient to color, and is high in thermal stability, high in fluidity and high in transparency.

Description

technical field [0001] The invention relates to the technical field of polypropylene, in particular to a method for preparing a medical transparent polypropylene material. Background technique [0002] Polypropylene (PP) is one of the five general-purpose plastics. It has excellent mechanical properties, good heat resistance, good chemical stability, and excellent high-frequency insulation performance. However, polypropylene also has obvious disadvantages: poor transparency, fluidity Low temperature, poor toughness at low temperature, and easy to generate static electricity during processing. Poor transparency makes the product look foggy and affects the appearance; poor fluidity when the product is molded on a multi-cavity mold will cause the PP material to fail to fit the cavity Full, the product is defective; PP products have poor toughness and are prone to breakage in cold places; due to the lack of polar groups inside the molecule and poor hygroscopicity, PP materials h...

AI Technical Summary

Problems solved by technology

[0002] Polypropylene (PP) is one of the five general-purpose plastics. It has excellent mechanical properties, good heat resistance, good chemical stability, and excellent high-frequency insulation performance. However, polypropylene also has obvious disadvantages: poor transparency, fluidity Low temperature, poor toughness at low temperature, and easy to generate static electricity during processing. Poor transparency makes the product look foggy and affects the appearance; poor fluidity when the product is molded on a multi-cavity mold will cause the PP material to fail to fit the cavity Full, the product is defective; PP products have poor toughness and are prone to breakage in cold places; due to the lack of polar groups inside the molecule and poor hygroscopicity, PP materials have extremely high surface resistivity and volume resistivity. The production process is prone to the accumulation of static charges and serious static hazards. Most manufacturers now use random copolymer polypropylene for injection molding products, which cannot solve the problem of static electricity, and the price is generally higher than that of homopolypropylene. In terms of transparency and In terms of toughness, it is okay to make general products, but it is not good to make high-end products with high transparency and high toughness. Many fluidity problems are solved by increasing injection pressure. If things go on like this, it will have a great impact on the injection molding machine, so , we designed a preparation method of medical transparent polypropylene material