High-temperature-resistant PP lunch box and manufacturing process thereof

Abstract

The invention relates to the technical field of plastic product processing, in particular to a high-temperature-resistant PP lunch box and a manufacturing process thereof. The high-temperature-resistant PP lunch box is prepared from the following raw materials: 70-90 parts of polypropylene, 30-60 parts of PC, 20-40 parts of nano calcium carbonate, 4-8 parts of talcum powder, 4-8 parts of carbon black, 2-6 parts of stearic acid, 6-10 parts of silica powder, 6-8 parts of mica powder, 6-10 parts of lithopone, 4-6 parts of azodicarbonamide, 1-4 parts of zinc borate, 2-6 parts of maleic anhydride, 0.4-0.8 parts of a plasticizer, 0.4-0.8 parts of a flame retardant, 0.4-0.8 parts of an anti-aging agent and 0.2-0.6 parts of an antioxidant, wherein all the raw materials are calculated in parts by weight. According to the high-temperature-resistant PP lunch box, the nano calcium carbonate is added to replace active calcium, and the silica powder is added to replace modified wollastonite, so that the strength of the high-temperature-resistant PP lunch box product is enhanced, and meanwhile, the high-temperature resistance of the PP lunch box product is also improved.

Description

technical field [0001] The invention relates to the technical field of plastic product processing, in particular to a high-temperature-resistant PP lunch box and a manufacturing process thereof. Background technique [0002] Modified polypropylene (PP plastic) is another excellent resin variety developed after nylon. It is a linear polymer with high density, no side chains, and high crystallinity. It has excellent comprehensive properties; it is made of PP plastic. The dinner plate has the characteristics of light weight, bright and calm surface, good chemical resistance, excellent chemical stability and electrical insulation, but also has low impact strength and tensile strength, insufficient heat resistance, insufficient rigidity, and easy aging , become brittle, easy to deform and easy to break and other shortcomings. For this reason, the patent application publication number is that in the patent application document of CN109929178A, a kind of high temperature resistant...

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Problems solved by technology

[0003] The high temperature resistant PP lunch box can improve the mechanical properties of the lunch box such as tensile strength, rigidity and impact resistance by modifying polypropylene. Wollastonite itself has excellent temperature resistance. By surface modification, Improve the dispersion of wollastonite in the polymer system, thereby improving the temperature resistance of the dinner plate; but the high temperature resistant PP lunch box also has certain defects, such as the wollastonite crystal particles in its raw material ratio are large Larger gaps are easily formed on the surface of high-temperature-resistant PP lunch boxes, and external heat is easy to penetrate; in addition, most of the additives in the production of plastic raw materials are aromatic hydrocarbons, which basically have a small amount of toxicity.

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