High-strength and easily-degradable composite material for garbage bag

Abstract

The invention relates to the technical field of polymer materials, and in particular to a high-strength and easily-degradable composite material for a garbage bag. The composite material comprises thecomponents of polyvinyl chloride resin, polyamide resin, a TPVC (Thermoplastic Polyvinyl Chloride) elastomer, metamorphic starch, a compatibilizer, a plasticizer, a reinforcing agent, a degradation catalyst and a stabilizer, wherein the compatibilizer is maleic anhydride grafted polyethylene; the stabilizer is a calcium-zinc composite stabilizer; the reinforcing agent is carbon black; and the plasticizer is dibutyl phthalate, isosorbide diester or butyl triacetate; a photocatalyst is a compound formed by mixing nano zinc oxide, anatase titanium dioxide and polylactic acid in a mass ratio of 2:5:10. The composite material has high strength, good toughness and remarkable weather resistance and has the characteristics of high degradation rate and fast degradation speed.

Description

Technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high-strength and easily degradable composite material for garbage bags. Background technique [0002] Polyvinyl chloride, also called PVC resin, is a very common polymer material. It is widely used in our daily life, including plastic pipes, product plastic shells, plastic packaging bags and other types of plastic daily necessities. There is a figure of PVC material. Plastic packaging bags or plastic films used in daily life are mainly made of polyvinyl chloride and polyethylene (PE). Polyvinyl chloride is not as heat-resistant as polyethylene because of its heat-resistant temperature, and it is easy to produce toxic and harmful substances after being heated, so it is generally not used For food packaging bags, food packaging bags mainly use polyethylene resin. The production cost of polyvinyl chloride resin is lower than polyethylene, so polyvinyl chloride is used in t...

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Problems solved by technology

[0005] Invention Patent Publication No. CN104650506A discloses a degradable environmentally friendly plastic. This type of plastic adds 20-45% polylactic acid material to the polyvinyl chloride material. The degradable performance of the polylactic acid material is used to improve the environmental performance of the plastic. However, the production cost of polylactic acid material is high, the tensile strength is insufficient, and the elongation at break is low. After compounding with polyvinyl chloride, it will affect the strength and toughness of the composite material; and the degradation rate of polylactic acid material itself is relatively slow. The natural degradation process is also relatively long

[0006] China Invention Patent Authorization Announcement No. CN105566690B discloses a starch-based degradable bioplastic and its preparation method; this technical solution introduces highly hydrophobic starchy materials into general-purpose plastic raw materials, which greatly improves the degradation performance of plastics, but the technical solution The starchy material used in this method is only hydrophobically modified biological starch. Although this starch can be rapidly degraded by microorganisms, it has a great impact on the strength and weather resistance of general-purpose plastics such as polyethylene and polypropylene. Using this kind of plastic to produce The strength of the packaging bag or film is very low, and the material used is easy to be torn and damaged. When it is used to pack oily and corrosive liquid materials, it is easy to leak due to material decomposition; under high temperature, the stability is poor, and it is very easy to age, pulverize and lose its use value. , of course not suitable for use as garbage bags

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