The purpose of PVC foaming regulator: In addition to all the basic characteristics of PVC processing aids, foaming regulators have higher molecular weight than general-purpose processing aids, high melt strength, and can give products more uniform cell structure and lower density. Improve the pressure and torque of PVC melt, so as to effectively increase the cohesion and homogeneity of PVC melt, prevent the merger of bubbles, and obtain uniform foamed products.
Advantages of PVC foaming regulators:
1. ACR processing aids can promote the melting of PVC, improve the surface finish, improve the elasticity of the melt, and enhance the elongation and strength of the melt.
2. It is beneficial to cover the bubbles and prevent the collapse of the cells. The molecular weight and dosage of the foam regulator have a great influence on the density of the foam sheet: with the increase of the molecular weight, the melt strength of PVC increases, and the density of the foam sheet can be made lower, and the increase of the dosage of the regulator have the same effect. But this effect does not have a linear relationship. Continue to increase the molecular weight or increase the dosage, the effect on reducing the density is not very obvious, and the density will tend to be constant.
3. Ultra-high molecular weight and super-strong melt strength endow products with lower density and uniform cell structure, especially suitable for PVC foamed thick board products.
4. Give the product a uniform cell structure, high molecular weight and high melt strength, lower product density, and excellent processing performance.
5. Good plasticizing ability, excellent melt fluidity, and good compatibility with PVC products, making the product more stable in size.
6.Excellent plasticizing performance, endowing the product with excellent processing performance and excellent surface gloss.
Precautions for using PVC foaming regulators:
When using PVC foaming regulators, attention should be paid to PVC products with different degrees of polymerization and different foaming regulators should be selected. Plastic foam products include: foam board, foam thick board, foam thin board, wood plastic foam board, lead plastic foam board, and so on., Choose different foaming regulators. Due to the fact that PVC foaming aids are also acrylic ester substances with processing aid properties, attention should also be paid to the internal and external lubrication balance of the formula when using.
Post time: Apr-28-2024
