Plastic color matching process

Abstract

The invention discloses a plastic color matching process, which comprises the following steps: (1) weighing plastic particles, adding the plastic particles into a high mixing machine, adding a dispersant and a pigment, and uniformly mixing the particles, the dispersant and the pigment; (2) at least setting four groups according to the process in Step (1), wherein the concentrations of the dispersants of the groups are the same, and the concentrations of the pigments of the groups are different; (3) respectively detecting the mixing uniformity of each group of test sample with a color measuringand matching instrument, wherein each test sample is detected for at least three times to obtain a corresponding color difference value; (4) performing automatic color matching fitting on each groupof test sample with color matching software of the color measuring and matching instrument to obtain a fitted color difference value; (5) performing injection molding: performing injection molding oneach group of test sample with the fitted color difference value less than or equal to 2; and (6) performing automatic color matching fitting on an injection molding color plate with the color matching software, thus obtaining a total color difference value. The process disclosed by the invention can save the time and the raw material cost, and guarantees the color matching quality.

Description

technical field [0001] The invention belongs to the technical field of plastic processing, and in particular relates to a plastic color matching process. Background technique [0002] At present, the plastic color matching process is mainly divided into two types. The first one is to add a certain amount of pigments to the plastic according to the formula ratio, and then perform injection molding after mixing. This method is to judge the uniformity of the mixing with the naked eye, which is simple and direct. , but the accuracy of naked eye judgment is low, often due to the uneven mixing of the early samples, the injection molding effect is not good, the difference between the plates is large, and the color matching effect is poor. The second is to mix the plastic granules with added pigments, and then use the extruder to pump once or twice to re-make the granules, and dry the granules after pumping and cutting, and then perform injection molding On the one hand, this proce...

AI Technical Summary

Problems solved by technology

[0002] At present, the plastic color matching process is mainly divided into two types. The first one is to add a certain amount of pigments into the plastic according to the formula ratio, and then perform injection molding after mixing. This method is to judge the uniformity of the mixing with the naked eye, which is simple and direct. , but the accuracy of naked eye judgment is low, often due to the uneven mixing of early samples, the injection molding effect is not good, the difference between the plates is large, and the color matching effect is poor

The second is to mix the plastic granules with added pigments, and then use the extruder to granulate once or twice to re-produce the granules, and dry the granules after pumping and cutting, and then perform injection molding On the one hand, this process is not only cumbersome and complicated, but also has high economic and technical requirements; on the other hand, the sample needs to go through an additional high-temperature melting state, during which pigments, especially organic pigments, are susceptible to oxidative discoloration, and the degree of change is not easy to control. Affects color fidelity

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