High-apparent mass blowing micro foaming automotive air duct material and preparation method thereof

Abstract

The invention discloses a high-apparent mass blowing micro foaming automotive air duct material and a preparation method thereof. The material disclosed by the invention contains the following components in parts by weight: 60-85 parts of polyethylene, 1-10 parts of a filling agent, 1-10 parts of a hyperdispersant, 5-20 parts of a flexibilizer, 1-10 parts of a foaming agent, 5-15 parts of a blowing promoter, 1-5 parts of a nucleating agent and 0.5-2 parts of other additives. The invention further discloses a preparation method of the high-apparent mass blowing micro foaming automotive air ductmaterial. The material disclosed by the invention has the characteristics that the molded foam is small in particle size, the foam density is high, the inner and outer walls of blowing air duct products have high apparent mass and the like, and wind resistance of the product is reduced; the product has the characteristics of being light in weight, excellent in dimensional stability, short in molding cycle, high in molding yield and the like; and meanwhile, the performance requirements on odor and VOC (Volatile Organic Compounds) in automotive original equipment manufacturers are met.

Description

technical field [0001] The invention relates to an automobile air duct material and a preparation method thereof, in particular to a blow-molded micro-foaming automobile air duct material with high apparent quality and a preparation method thereof, belonging to the field of material technology. Background technique [0002] The automotive air duct material is located at the connection between the automotive air conditioner and the cockpit, and is responsible for effectively transferring the hot and cold air generated by the air conditioner to the interior of the cockpit, producing cooling or heating effects, and ensuring the comfort of the cockpit in high and low temperature environments . Therefore, there are strict requirements on its tightness and its pipe wall's resistance to air flow. [0003] Micro-foaming blow molding technology has been used in the application of air duct products, which can not only significantly reduce the weight of original products, save energy ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, the present invention provides high-quality blow-molded micro-foamed automobile air duct material and its preparation method. Under the premise of ensuring the light weight of the product, the material has achieved good tensile properties in melt molding and foaming The advantages of small cell diameter, no cell collapse, long retention time, smooth inner and outer walls of the product, high rigidity, and good dimensional stability have solved the problem of poor internal and external appearance quality in product applications.

Images