How much do you know about PVC foaming regulators

1、 Foam mechanism:

The purpose of adding ultra-high molecular weight polymers to PVC foam products is to promote the plasticization of PVC; The second is to improve the melt strength of PVC foam materials, prevent the merging of bubbles, and obtain uniformly foamed products; The third is to ensure that the melt has good fluidity, in order to obtain products with good appearance. Due to the differences in products, equipment, processes, raw materials, and lubrication systems used by different foam product manufacturers, we have developed foam regulators with different performance to meet the different needs of users.

1. Definition of Foam Materials

Foamed plastic, also known as foam plastic, is a composite material with plastic as the basic component and a large number of bubbles, which can be said to be filled with gas.

2. Classification of Foam Sheet Materials

According to different foaming ratios, it can be divided into high foaming and low foaming, and according to the hardness of the foam body texture, it can be divided into hard, semi hard and soft foams. According to the cell structure, it can be divided into closed cell foams and open cell foams. The commonly used PVC foam sheet belongs to hard closed cell low foam sheet.

3. Application of PVC foam sheets

PVC foam sheets have advantages such as chemical corrosion resistance, weather resistance, and flame retardancy, and are widely used in various aspects, including display panels, markings, billboards, partitions, building boards, furniture boards, etc.

4. Key factors for evaluating the quality of foam sheets

For foaming materials, the size and uniformity of foam pores are key factors affecting the quality of the sheet. For low magnification foam sheets, the foam pores are small and uniform, the foam sheet has good toughness, high strength, and good surface quality. From the perspective of reducing the density of foam sheets, only small and uniform foam pores have the possibility of further reducing density, while large and dispersed foam is difficult to further reduce density.