Molding method of bio-based filler modified polylactic acid composite material product

Abstract

The invention belongs to the technical field of composite material processing, and particularly relates to a molding method of a bio-based filler modified polylactic acid composite material product. According to the method, the technical problems of liable carbonization of bamboo fibers and the like in the prior art are solved. A pelleting technology of a polylactic acid bamboo fiber composite material comprises the following steps of S1, material preparation; S2, placement; S3, heating; S4, extrusion; S5, cutting-off; and S6, die casting. The method has the advantages that a bamboo fiber material can be prevented from being carbonized due to long-time high temperature heating in a conveying channel, and the quality of products is improved; at the same time, due to the fact that a path onthe conveying channel is shortened, the addition amount of bamboo fibers can be increased, so that the cost of producing main ingredients is reduced.

Description

technical field [0001] The invention belongs to the technical field of composite material processing, and in particular relates to a molding method of a bio-based filler-modified polylactic acid composite product. Background technique [0002] Polylactic acid, bamboo fiber and auxiliary materials can be mixed to produce environmentally friendly materials, which are used in various tableware and other food fields. [0003] When various materials are mixed, the current material mixing is concentrated in one place and then heated to produce the final composite material. [0004] Heating is carried out in the transmission channel, and the above-mentioned mixing will cause carbonization of the bamboo fiber material in the transmission spiral channel due to high temperature heating, which destroys the original performance of the bamboo fiber. [0005] Secondly, the above-mentioned existing composite materials are all molded by injection molding. Injection molding needs to have ce...

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Problems solved by technology

[0004] The heating is carried out in the transmission channel, and the above-mentioned mixing will cause carbonization of the bamboo fiber material in the transmission spiral channel due to high temperature heating, which destroys the original properties of the bamboo fiber

[0005] Secondly, the above-mentioned existing composite materials are all molded by injection molding. Injection molding needs to have certain requirements on the viscosity of the heated material. If it is too viscous, injection molding cannot be performed, and the amount of bamboo fiber added is limited limitation, that is, the cost of the main material is relatively high

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