What are the techniques for using PVC foaming regulators?

In the PVC foaming formula, in order to obtain a more uniform, fine, and independent cell structure product, in addition to using foaming modifiers such as ACR processing aids, PVC foaming modifiers are generally also used in the formula. Sometimes, foaming accelerators such as metal oxides such as zinc oxide and lead oxide, organic acid salts such as zinc stearate, and urea derivatives are also added (to adjust the decomposition temperature of the foaming agent). The dosage of foaming regulator is usually 4% -8% (based on the total resin content), which needs to be dynamically matched with foaming agents (such as AC yellow foaming agent, NC white foaming agent). The production of thick plates requires an increase in the proportion of low-temperature NC foaming agent (typical ratio of 1.2 parts NC+0.5 parts AC) to avoid concentrated gas release in the later stage leading to foam breakage; Density control requires balancing gas generation and decomposition temperature
PVC foaming regulator is actually an acrylate lotion polymer. It has all the characteristics of PVC processing aids, but its molecular weight is much higher than that of PVC processing aids. In the PVC foaming process, adding PVC foaming regulator can increase the melt strength of PVC products, thereby preventing the merging of bubbles and obtaining uniformly foamed PVC foam products. At the same time, it can also promote the plasticization of PVC and ensure that the melt has good fluidity.
When selecting PVC foaming modifiers, attention should be paid to using different foaming modifiers for PVC with different degrees of polymerization, such as PVC-700, PVC-800, and PVC-1000. Different products, such as foam boards, foam thick boards, foam thin boards, wood plastic foam boards, lead plastic foam boards, etc., require the use of different foam modifiers. Due to the fact that PVC foaming agents are also acrylic compounds with processing aid properties, attention should also be paid to the internal and external lubrication balance of the formula when using them. Bangtai Petrochemical Foam Regulator meets your various needs for products. For more product inquiries about PVC foam regulators, please feel free to call us!