How much do you know about the raw materials of PVC foam board formula？
How much do you know about the raw materials of PVC foam board formula
PVC resin: This is the most important raw material, foamed substrate, P-700 type PVC resin is generally used in the production of PVC foamed sheet, its gelation speed is fast during processing, the processing temperature is relatively low, the product quality is stable, density Easy to control. In the production of skinned foamed PVC sheet, in order to improve product quality and strictly control the fluctuation of product density and thickness, P-700 type vinyl PVC resin is mostly used. In the production of free-foamed PVC sheet, from the perspective of reducing production costs, many manufacturers have adopted the calcium carbide method P-700 type PVC resin
Stabilizer: In the production process of PVC foamed sheet, in order to fully plasticize the material, the temperature of the material is high; and the sheet mold has a wide cross-section and a long flow channel, especially the long setting section of the skinned foamed sheet mold. In addition, the foaming agent also generates heat of decomposition during the decomposition process. These factors require that the stabilizer must have sufficient thermal stability to ensure product quality and long-term stable production.
Foaming regulator: copolymerized by methyl methacrylate, ethyl acrylate, butyl acrylate and styrene, its molecular structure is core-shell structure, as a processing aid in the formulation system can effectively reduce the plasticization temperature and promote plastic Chemical effect, improve plasticizing efficiency, improve melt strength, reduce melting pulsation, prevent melt fracture, and significantly improve the surface smoothness of products.
Foaming agent: Foaming agent is a substance that makes the target substance into pores. It can be divided into chemical foaming agent, physical foaming agent and surfactant.
Filling agent: In the formulation system, the general dosage of light calcium carbonate is 10 to 40 parts. In addition to being used as a foaming nucleating agent, it can also reduce the cost of materials. The appearance quality and product density are difficult to control, resulting in an increase in overall cost.
Pigment: This is a good understanding, used to color the board.
