Preparation method of low-odor foamed polypropylene material

Abstract

The invention relates to a preparation method of a low-odor foamed polypropylene material, and the method comprises the following steps of: weighing polypropylene resin, a sodium borohydride alcohol solution and auxiliary materials, and mixing for at least 1h under the condition that the temperature is not lower than 100 DEG C; then melting, extruding, cooling and setting; after that, mixing withsodium bicarbonate and performing injection molded. The method introduces a sodium borohydride cyclohexanol solution; sodium borohydride can reduce formaldehyde to methanol, cyclohexanol can dissolveformaldehyde and other harmful organic substances and bring them out when vaporized; therefore, the content of the formaldehyde and other harmful organic substances in the material can be effectivelyreduced, the pungent smell of the material and the amount of the harmful substances the can be volatilized are reduced, and the environmental protection of the polypropylene material is improved; at the same time, the mechanical properties test results show that the introduction of the sodium borohydride cyclohexanol solution has no effect on the overall mechanical properties of the material.

Description

technical field [0001] The invention relates to the field of polypropylene materials, in particular to a method for preparing low-odor foamed polypropylene materials. Background technique [0002] In recent years, due to its lightweight characteristics, foamed polypropylene materials have become more and more widely used in the automotive field. However, the material will contain organic small molecule compounds with volatile characteristics and pungent odor to varying degrees; such substances are represented by formaldehyde. During the use of expanded polypropylene materials, (especially when the temperature is high) It will emit, which not only worsens the smell in the car, but also seriously endangers the health of the people in the car, which greatly limits the application of expanded polypropylene materials. Contents of the invention [0003] The invention overcomes the disadvantages of the prior art, and provides a preparation method of foamed polypropylene material...

AI Technical Summary

Problems solved by technology

However, the material will contain organic small molecule compounds with volatile characteristics and pungent odor to varying degrees; such substances are represented by formaldehyde. During the use of expanded polypropylene materials, (especially when the temperature is high) It will be emitted, which not only worsens the smell in the car, but also seriously endangers the health of the people in the car, which greatly limits the application of expanded polypropylene materials.