PVC processing aids price will have an impact on quality?

In the processing of PVC materials will usually use some PVC processing aids, which can help us better processing, but want to have good results which still need us to go to the correct use, then, there will be some attention we need to pay attention to and understand, so as to rationalize the use.

1, additives and resin compatibility, in general, additives only with good compatibility between the resin, in order to make the additives long-term, stable, uniform presence in the product, and effectively play its function, if the compatibility is not good, it is easy to occur "sweating" or "spray cream "phenomenon, but sometimes the compatibility is not good, the product requirements are not too strict, there can still be poor compatibility, such as filler and wax compatibility is poor, as long as the particle size of the filler is small, can still basically meet the performance requirements of the product, line or try to deal with coupling agents or surfactants, in order to fully send off its function.

2, the durability of additives: PVCJ processing aids sometimes volatile reduction, additives are mainly volatile through three pathways, extraction and migration mainly with the size of the molecular weight of the additives, solubility in the medium and the degree of barrenness in the resin.

3, PVC additives on the adaptability of processing conditions: the processing of certain resins with more demanding conditions, such as high processing temperatures, should consider whether the selected additives will be decomposed, additives on molds, equipment, whether there is corrosive effect.

4, product use on the constraints of the additives: different uses of the products on the additives odor, toxicity, electrical properties, soya, thermal properties have certain requirements.

5. Synergistic and antagonistic effects of additives: In the same resin system, sometimes two additives will produce "synergistic effects", which are much more effective than using a certain type of additive alone. However, if the cooperation is not appropriate, the two additives produce "antagonistic effect" to weaken the function of each additive, or even make a certain additive lose its function, this point should be paid special attention to, such as carbon black and amine or phenolic oxygen disruptor and will produce antagonistic effect.