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Lighten the way of injection molding processing

by:CSSSLD     2021-01-23
The rational selection of injection molding processing raw material is increase plastic products surface finish basic factors. Choose the good raw material, glossiness raise more easily. Plastic raw materials can be divided into two major categories of resins and additives.

brighten up the improve plastic injection tooling surface gloss or finish, the specific measures in addition to the reasonable raw material selection, and lighten the methods, blending lighten the brightening method, shape control method, control of molding equipment finish and so on.

the characteristics of the resin itself had a greater influence on the surface gloss of plastic products, is the most effective way to control plastic surface gloss. The influence of the corresponding plastic products surface gloss mainly depends on the following points.
resin varieties, different kinds of resin its corresponding products are quite different from the gloss. For the same kind of resin, synthetic methods, corresponding to the resin products gloss is not the same.

resin features, for the same kind of resin, its specific features, glossiness is not the same. Generally the larger the MFR, the greater the glossiness of the corresponding products. The influence of molecular weight mainly reflects on the molecular weight distribution width. Molecular weight distribution is wider, and its corresponding products gloss to drop, mainly because the broad molecular weight distribution, the regularity of the material is not increased.

high water absorption resin, bibulous rate is larger influence on its corresponding products of gloss. Of all the plastic additives, the biggest influence on gloss for packing, followed by and flame retardant plasticizer, stabilizer, etc. ,, but the influence is small.

the influence of different kinds of packing on the gloss are different, in addition to the glass beads of almost all of the packing will make filling products gloss, just different from decline. Filler particles microscopic shape is different, have different influence on filling products gloss, the impact of the size of the order as: sphere 'granular' needle 'sheet. That is to say, acicular, packing sheet to make the filling products gloss decreased, the spherical filler lowered the glossiness of filling products less.

in addition, the filler particle size distribution width size is different, have different effects on filling products gloss. Its influence rule is: the filler particle size distribution is wider, fill the products, the lower the surface gloss. This is mainly because the greater the difference packing size range, the surface of the packed products is uneven, incident light, the more prone to diffuse.

in addition to the packing, add other mixing also has effect on the gloss of injection molding products processing. General organic additive metropolitan improve gloss of the product, and most of the inorganic additives will make products gloss drops.

more wonderful to share: the density of plastics, click directly.
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