White Spots Or Rough Handle After Filling Masterbatch In Plastic Products

White Spots Or Rough Handle After Filling Masterbatch In Plastic Products
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Whether it is a manufacturer that fills a masterbatch or a defoamer masterbatch, or a user who uses a masterbatch or a defoamer masterbatch, there have been more or less instances where the masterbatch or rough-feeling product appears after adding the masterbatch. The occurrence of these white spots or roughness is mainly due to the fact that the inorganic powder filler does not effectively disperse and form small and hard particles during the production of the masterbatch, and the product processing equipment does not have the function of dispersing these aggregated particles. Appears on the surface of the product, affecting the quality and appearance of the product, showing rough surface and visible。

To solve these white spots or feel rough, a more fundamental approach is to solve the problem of dispersion of masterbatch. Manufacturers of master batches know that the masterbatch composition is nothing more than three materials: inorganic powder fillers, additives, carriers, and there are only the first two types of unsupported masterbatch. From the dispersion theory and the composition of the masterbatch, it can be seen that the solution to the dispersion of the masterbatch is the most important component. The use of additives, the proportion of additives, and the coordination of various additives determine the The quality of masterbatch dispersion and masterbatch grade level. At present, the general price of masterbatch is low, and the profit margin is small. However, under the environment where users have higher and higher quality requirements for the masterbatch, more difficulties have arisen for the production of masterbatch. In order to reduce costs, many masterbatch manufacturers mostly use inexpensive additives such as stearic acid, paraffin wax, and inferior quality PE waxes, and these additives are mainly responsible for lubrication and do not effectively solve the masterbatch. The dispersion problem, even if it appears to be dispersed in some types of masterbatch, is also very unstable, making the quality of the masterbatch very good.

So, are there ways to ensure good dispersion of masterbatches without increasing costs too much and even reducing costs? This is difficult from the perspective of traditional masterbatch production, but since the advent of compound dispersants dedicated to masterbatch, this problem has been relatively easy to solve.

The composite dispersant has multiple effects such as dispersion, lubrication, and coupling, overcoming the traditional dispersants (such as stearic acid, PE wax, and stearate, etc.) having a relatively single function, unsatisfactory dispersion effect, and unstable quality of the master batch product. Such drawbacks can more effectively improve and stabilize the dispersion of the masterbatch; at the same time, the composite dispersant does not produce the phenomenon of precipitation such as stearic acid, and the price is relatively low, which is equivalent to the price of the middle- and low-end PE waxes. Compared with the original imported EBS production masterbatch experiment, the comprehensive dispersion performance of the composite dispersant surpasses EBS.

In the masterbatch formulation, the additive is based on a composite dispersant (the ratio of addition is adjusted between 3 and 6% depending on the cost and quality requirements), and then supplemented with some of the other lower-end additives. This not only ensures that the masterbatch has excellent dispersibility, it solves the problem of white spots or rough handles, but also does not significantly increase the cost, even in the middle and high-end masterbatch can also reduce the cost by about 5 to 10% or more

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