Anti-folding stress whitening resistant polypropylene (PP) material and preparation method thereof

Abstract

The invention discloses an anti-folding stress whitening resistant polypropylene (PP) material and a preparation method thereof. The material is prepared from the following raw materials in part by weight: 55 to 75 parts of co-polypropylene, 5 to 20 parts of POE Lc670, 10 to 30 parts of stress whitening resistant master batch, 0.05 to 0.15 part of white mineral oil, 0.1 to 0.3 part of hindered phenol antioxidant 1010, 0.1 to 0.3 part of phosphite ester antioxidant 1680 and 0.1 to 0.3 part of calcium stearate. The stress whitening resistant master batch comprises the following components in part by weight: 40 to 65 parts of EPDM or EPR or POE, 30 to 50 parts of nano active light CaCO3, and 0.5 to 2 parts of sodium polyethylene with low molecular weight. The polypropylene (PP) material is prepared by using a double-screw extruder with 9 temperature control areas according to the specific process conditions. The material has the advantages of good repeated bending resistance and stress whitening resistance, simple preparation process and low preparation cost.

Description

technical field [0001] The invention relates to stress-whitening-resistant engineering plastics, in particular to a folding-resistant stress-whitening-resistant polypropylene (PP) material and a preparation method thereof. Background technique [0002] As one of the five major engineering plastics, polypropylene (PP) has good bending resistance (commonly known as white folding glue). Ethylene and other advantages, is a general-purpose thermoplastic resin material, it also has good electrical properties, high-frequency insulation and chemical corrosion resistance, and is not affected by humidity, etc., suitable for making general mechanical parts, corrosion-resistant parts and insulating parts , Widely used in glass assembly industry, automobile industry, electronics, electrical industry, industrial machinery parts, optical discs, packaging, computers and other office equipment, medical and health care, film, leisure and protective equipment and other fields. [0003] With t...

AI Technical Summary

Problems solved by technology

When polypropylene (PP) is used to manufacture products, it is easily affected by concentrated stress and produces silver streaks on the product. The expansion of silver streaks absorbs energy and causes the product to turn white. In severe cases, it will also affect the performance and quality of the product. The white problem has become a recognized problem in the industry in recent years

[0004] In view of the above shortcomings, it is necessary to explore a polypropylene (PP) material and preparation method that can withstand repeated folding and stress whitening, so as to solve the problem that polypropylene (PP) products are prone to stress whitening and affect the performance and quality of PP products

Images