Polyvinyl chloride-polyethylene composite plastic

Abstract

The invention relates to a polyvinyl chloride-polyethylene composite plastic. The polyvinyl chloride-polyethylene composite plastic comprises the following components in parts by weight: 70-90 parts of polyvinyl chloride, 15-25 parts of polyethylene, 20-35 parts of plastic additives, 5-10 parts of m-phenylene dibenzoate, 6-18 parts of auxiliaries and 3-8 parts of dibasic lead phthalate. The polyvinyl chloride-polyethylene composite plastic disclosed by the invention has good weather fastness, excellent flowability, good heat stability, low shrinking percentage and high mechanical strength.

Description

technical field [0001] The invention relates to a composite plastic of polyvinyl chloride and polyethylene. Background technique [0002] Polyvinyl chloride is a thermoplastic resin polymerized by vinyl chloride under the action of an initiator. Due to the advantages of high chemical resistance, good electrical insulation performance, stable physical and chemical properties, and low price, polyvinyl chloride is widely used in various fields such as industry, agriculture, transportation, construction, communication, and medical care. However, pure polyvinyl chloride has certain defects in mechanical strength and flame retardancy, which limit its use. In order to improve the flame retardancy and mechanical properties of PVC, it is usually necessary to add other components, such as flame retardants, fillers, etc. In order to meet the requirements of certain mechanical properties and high flame retardancy, flame retardants and fillers are generally added in large amounts, and ...

AI Technical Summary

Problems solved by technology

In order to meet the requirements of certain mechanical properties and high flame retardancy, flame retardants and fillers are generally added in large amounts, and these added components are usually not well compatible with PVC resins. On the other hand, due to these The synergistic effect between the additives has not been properly exerted, and a large amount of additives is required to achieve the desired effect, resulting in a greatly reduced processing flow performance of the final PVC composite.

It can be seen from the prior art that in the process of polyvinyl chloride modification, improving its flame retardancy and improving its fluidity are mutually restraining solutions. If the flame retardancy is improved, the fluidity will decrease, and if the fluidity is improved, then Reduced flame retardancy

[0003] Polyvinyl chloride has excellent mechanical properties, excellent electrical properties, strong acid and alkali resistance, and good chemical stability, but it has high moisture absorption, poor fluidity, and is extremely prone to decomposition