Composite additive for improving weather resistance and tensile property of linear polyethylene film material and preparation method of composite additive

Abstract

The invention relates to a composite additive for a linear polyethylene film material, which is prepared from the following raw materials in percentage by weight: 5 to 25 parts of nano styrene-butadiene rubber nucleating agent, 5 to 20 parts of phenolic antioxidant, 5 to 30 parts of phosphite antioxidant, 2 to 60 parts of anti-ultraviolet stabilizer and 10 to 40 parts of hydrated magnesium silicate. The preparation method comprises the following steps: S1, carrying out pre-dispersion in a high-speed disperser, respectively adding the powdery nano styrene-butadiene rubber nucleating agent, the phenolic antioxidant and the hydrated magnesium silicate into the high-speed disperser according to the ratio, carrying out pre-dispersion for 1-10 hours, S2, adding the pre-dispersed material obtained in the step S1 into a slow disperser, carrying out stirring for 1-10 hours, and carrying out cooling to room temperature. And mixing and dispersing with a granular phosphite antioxidant and an anti-ultraviolet stabilizer for 1-10 hours, and after uniformly dispersing, carrying out extrusion granulation, dust removal and dehumidification, screening and packaging to obtain the linear polyethylene film material composite additive.

Description

technical field [0001] The invention relates to the field of linear polyethylene composite auxiliary agents, in particular to a composite auxiliary agent for improving the weather resistance and tensile properties of linear polyethylene film materials and a preparation method thereof. Background technique [0002] Polyethylene PE is the simplest kind of molecular structure in resin. It has abundant raw material sources, low price, excellent electrical insulation and chemical stability, easy to shape and process, and has many varieties, which can meet the requirements of different properties. Ethylene PE has the largest output, the fastest development and the most active variety development among synthetic resins. Because PE has excellent low temperature resistance, chemical stability, resistance to most acid and alkali erosion, electrical insulation, etc., and because of its light weight, easy processing and other characteristics, the production of PE has developed rapidly. ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems and overcome the defects of polymer additives in the prior art that are easy to break, have no tensile properties, are easy to agglomerate, have poor volatility resistance and migration resistance, resulting in poor aging resistance of polymer PE, this paper The purpose of the invention is to solve the above-mentioned problems in the prior art, and to provide a composite auxiliary agent for linear polyethylene film material and its preparation method

Among them, the composite auxiliary agent adopts nano-styrene-butadiene rubber nucleating agent, phenolic antioxidant, phosphite antioxidant, anti-ultraviolet stabilizer and hydrated magnesium silicate. The preparation method is simple, the preparation process is low in cost, and the preparation process does not contain Dust pollution, safety and environmental protection and other technologies have advantages, and at the same time solve the problem of easy migration and volatilization of antioxidants. Compared with traditional auxiliaries, the composite auxiliaries prepared by the present invention have excellent tensile load and fracture standards. It is called strain, so that the compound additive has oxidation resistance and light stability, and can improve the aging resistance of the polymer

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