Granulating method for filling material powder of thermosetting plastic

Abstract

The invention provides a granulating method for filling material powder of thermosetting plastic. The granulating method for the filling material powder of the thermosetting plastic comprises the following steps that (1) thermosetting plastic powder and required filling materials are mixed in a required proportion, and the material temperature is controlled to 0-5 DEG C; (2) a solvent and a surface active agent are added into the mixed materials in the proportion of 1%-10% after being mixed according to the ratio of 100:1 to 1000:1; and (3) the materials added with the solvent and the surface active agent are granulated, compacted, screened and dried. According to the granulating method for the filling material powder of the thermosetting plastic, in the granulating process, the materials are mixed through upper stirring paddles and then mixed again through a rotary mixing tray, afterwards, the raw materials pass through a baffle plate to be mixed for the third time through lower stirring paddles, and thus the requirement for continuous and uniform mixing is met. In the granulating process, deionized water and perfluoro caprylic acid ammonium salt are used as the solvent, consumption of the solvent is low, and the solvent is completely recovered in the drying process, so that the influence of the solvent on the environment is avoided, and the whole process is environmentally friendly.

Description

Technical field [0001] The invention relates to the technical field of granulation of thermosetting plastic filling material powder, and in particular to a method of granulating thermosetting plastic filling material powder. Background technique [0002] The continuous granulation process of thermosetting plastics has always been a problem for the machinery industry and the plastics industry for many years. Even in developed countries, extruded phenolic molding compound pellets have only appeared in the last two years, indicating the thermosetting plastic extrusion in developed countries abroad. The technology is not fully mature and is still in the stage of research and experimentation. [0003] Because of the low molecular weight of the matrix resin and a large amount of fillers and reinforcements, thermosetting plastics have the following characteristics before being heated and solidified into insoluble and infusible polymer materials: after heating and melting, the viscosity is...

AI Technical Summary

Problems solved by technology

The particle shape of the former granulated product is irregular and the fluidity is poor

The latter is the main production method of pellets, but most of them use flammable and harmful alcohols and methane chlorides

And in the drying process, it is directly discharged into the atmosphere with the hot air, which has certain pollution to the environment.

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