Modified polypropylene material for soft freezing layer drawer of refrigerator

Abstract

The invention relates to a polypropylene material, and in particular relates to a modified polypropylene material for a soft freezing layer drawer of a refrigerator. The modified polypropylene material which is capable of replacing a conventional material, namely polyolefin, is prepared through physical commixing modification by adopting a polyolefin material with relatively low price, inorganic minerals, functional aids and the like; the modified polypropylene material is non-toxic and environmentally-friendly, good in processing flowability, excellent in mechanical property and good in low-temperature impact resistance, has a molding shrinkage rate being equivalent to that of ABS (Acrylonitrile Butadiene Styrene) or HIPS (High Impact Polystyrene), and can replace ABS or HIPS to be moldedinto products that meet the requirements of a main machine factory under the condition that sizes of injection molds are not changed; as the modified polypropylene material has no unsaturated doublebond, the aging resistance of the material is higher than that of ABS or HIPS; due to the adoption of the polyolefin material with low cost and a large amount of inorganic minerals for filling, the comprehensive cost of the modified polypropylene material is reduced by 10-15% compared with that of the conventional ABS and HIPS, and great economic benefits can be made.

Description

technical field [0001] The invention relates to a polypropylene material, in particular to a modified polypropylene material used for a refrigerator soft-freezing layer drawer. Background technique [0002] Polypropylene (PP) has been widely used in the automobile and home appliance industries due to its low density, high cost performance, excellent heat resistance, corrosion resistance and easy processing, and has become the largest and fastest growing plastic in automobiles and home appliances The fast variety. However, due to the shortcomings of general PP, such as large shrinkage rate, poor product dimensional stability, and easy warping and deformation; poor low-temperature toughness and brittle fracture; Modification treatment, especially when used for refrigerator drawer materials, requires high rigidity and toughness of the material. [0003] The mineral fillers currently used in modified polypropylene materials used in refrigerators are mainly ordinary talcum powd...

AI Technical Summary

Problems solved by technology

However, its rigidity is low, so it cannot be used as a material for parts requiring high rigidity, such as refrigerator drawers.

[0005] In addition, the drawer of the refrigerator’s soft-freeze layer is injection-molded with ABS or HIPS materials. The price of the material is high, and the processing performance is in contradiction with the mechanical properties of the material (especially the low-temperature impact resistance). The mechanical properties are relatively poor, and the material contains unsaturated double bonds, which is easy to age and affects the service life of the material

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