PVC Foaming Regulator-530
Introduction
PVC foaming regulator is made of acrylate emulsion polymerization, this product is white powder easy to flow.Insoluble in water, ethanol, soluble in acetone, chloroform.
Foaming mechanism of PVC foaming regulator
PVC foaming regulator is actually acrylate processing AIDS, it has all the basic characteristics of PVC processing AIDS, and PVC general processing AIDS the only difference is the molecular weight,PVC foaming regulator molecular weight is much higher than the general processing AIDS.In PVC foaming products, the purpose of adding ultra high molecular weight polymer foaming mechanism:
One is to promote the plasticization of PVC;
Second, in order to improve the melt strength of PVC foaming material, to prevent the merger of bubbles, to get uniform foaming products;
The third is to ensure that the melt has good fluidity, in order to get the appearance of good products.
Performance of PVC foaming regulator
PVC foaming regulator is a high molecular weight processing aid, can be widely used in PVC profiles, pipe fittings, pipe materials and low foaming products.
Performance of PVC foaming regulator
1) In the processing and molding of PVC resin, it has good dispersion and processing fluidity;Promote PVC low temperature melting, improve PVC melting strength, stretching length and elasticity.
2) broaden the processing range of PVC resin, give products a good surface gloss;Used for foaming products, can obtain uniform bubble structure, lower density.
We would like to remind users to select the suitable ACR model and the number of additional copies according to the product characteristics of each model, combined with their own product requirements, formula system and equipment characteristics. As long as you put forward specific requirements, we can also recommend the appropriate model and number of additional copies to you through tests.
Characteristics of PVC foaming regulator
1. Physical and chemical properties
The product is white flow powder, bulk density 0.20-0.50g/cm3, insoluble in water, ethanol, but soluble in chloroform.
2. application characteristics
The addition of foaming regulator in PVC extruded low-foaming products can promote the gelation of PVC and improve the thermal strength and extensibility of melt.Improve the surface quality of products;The foaming agent formation of the fine bubble stability, does not make the bubble wall burst and penetrate each other to form a large hole, so the foam density is not only small and good strength.
The influence of processing auxiliaries on PVC foamed sheet
What is the impact of our commonly used processing additives on PVC foamed sheet materials?
In short, ACR processing AIDS can promote PVC melting, improve surface finish, improve melt elasticity, and enhance melt elongation and strength.It is helpful to cover the bubble and prevent the bubble hole from collapsing.The molecular weight and dosage of foaming regulator have a great impact on the density of foaming sheet: with the increase of molecular weight, PVC melt strength, the density of foaming sheet can be done lower, and improve the dosage of the regulator has the same effect.However, this effect has no linear relationship, and the effect of increasing molecular weight or dosage is not very obvious, and the density tends to be constant.
Broadly speaking, the important relationship between foam regulator and foaming agent, at the same time, the density of foamed sheet with foaming regulator is a balance, the balance, the density of foamed sheet is not affected by the influence of foaming agent content, are held constant, also is to increase the dosage of foaming agent can't reduce the density, the cause of this phenomenon is under a certain amount of foam regulator dosage, PVC melt strength is limited, the excess gas bubble hole collapse or merger.
Performance and use
It can be widely used in rigid foaming board, foaming tube and other rigid plastic components that need foaming.This product can effectively improve the uniformity of bubble holes of hard PVC low-foaming products, promote PVC tree plasticizing and melting, and improve the comprehensive performance and quality of finished products.
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