Analysis of the causes of discoloration of TPE/TPR products
Time of issue:2022-12-05
Analysis of the causes of discoloration of TPE/TPR products
Influencing factor one.
The influence of tpe raw materials on discoloration
1, the material is contaminated.
2, high content of moisture and volatiles.
3, colorants, additives decomposition.
Influencing factor two.
The setting of the injection molding process in tpe plastic parts also affects the product discoloration
1, screw speed is too high, pre-molding back pressure is too large.
2, the barrel, nozzle temperature is too high.
3, the injection pressure is too high, too long, the injection speed is too fast to make the product discoloration
Analysis of the plastic ber.
First of all, TPE raw materials on the impact of discoloration, the first and third are easy to understand (colorants, additives degradation and decomposition, their own discoloration, will naturally lead to discoloration of TPE products), and the second to be experienced professionals to explain the interpretation of doubt.
As for the injection molding process setting, the three influencing factors may lead to excessive friction and shear force or high temperature of the material, resulting in the possibility of degradation and discoloration, and if colorants are added to the material, the decomposition of colorants may occur and lead to discoloration of the final TPE products.
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