Low-odor cold-resistant wear-resistant elastic injection molding material and preparation method thereof

By constructing the composite morphology of cellulose sol coated nanoparticles and melt blending with PVC resin powder, a three-dimensional interlocking structure is formed, which solves the shortcomings of PVC elastic injection molding in terms of bending resistance and dimensional stability, and achieves high performance under low temperature conditions.

CN119708720AInactive Publication Date: 2025-03-28CGN TUOPU (HUBEI) NEW MATERIALS CO LTD
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Patent Information

Application Number
CN202411599104.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-11
Publication Date
2025-03-28
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing PVC elastic injection moldings have shortcomings in bending resistance and dimensional stability, especially in low temperature conditions.

Method used

A cellulose sol system is constructed by tetrabutyl ammonium hydroxide and carboxymethyl cellulose, preload and calcium chloride are added, and hot carbon dioxide gas is introduced to form a composite form of cellulose sol-coated nanoparticles. The layered composite material is prepared after impregnation and hot pressing, and melt blended with PVC resin powder to form a three-dimensional interlocking structure to enhance toughness and stability.

Benefits of technology

It significantly improves the bending and winding resistance and dimensional stability of PVC elastic injection molding, can maintain low shrinkage and good elastic properties under low temperature conditions of -40℃, and is suitable for applications such as electric vehicle parts.

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Abstract

The invention relates to the technical field of elastic injection molding materials, and particularly discloses a low-odor cold-resistant wear-resistant elastic injection molding material and a preparation method thereof. A preparation method of a low-odor cold-resistant wear-resistant elastic injection molding material comprises the following steps: 1) mixing PVC resin powder, di-iso-decylphthalate, a stabilizer, calcium powder and a lubricant to obtain a mixture; 2) taking carrageenan, vegetable protein and water, uniformly stirring, adding dimethyl sulfoxide and urea, continuously uniformly stirring, drying, calcining, and grinding to obtain a front material; 3) adding a tetrabutylammonium hydroxide solution and carboxymethyl cellulose into a container, uniformly mixing, adding the preposed material and calcium chloride, then scraping a film on a film scraping plate, and then putting into water for shaping and washing to obtain a film material; 4) taking the film material, hot-pressing, drying and crushing to obtain a layered composite material, and 5) mixing and extruding the mixture and the layered composite material to obtain the low-odor cold-resistant wear-resistant elastic injection molding material. The low-odor cold-resistant wear-resistant elastic injection molding material has the advantages of high elasticity, high toughness and low shrinkage rate.
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