PVC foam board, also known as Chevron board, has good thermal insulation, heat preservation, sound insulation, light load-bearing properties, etc., due to other insulation materials, and is easy to operate, highly mechanized, time-saving, and labor-saving. Many netizens are asking what are the raw materials for the production of PVC foam board? The following PVC foam board manufacturer Yuansheng technicians will answer in detail for you.
What are the raw materials for the production of PVC foam board?
The main raw materials for the production of PVC foam boards are: PVC resin, stabilizers, foam regulators, foaming agents, pigments, and fillers.
PVC resin: PVC is generally selected as type 8 resin, which has fast gelation speed during processing, relatively low processing temperature, stable product quality, and easy control of density. In recent years, many manufacturers have switched to Type 5 resin.
Stabilizer: In the production process of PVC foam board, in order to fully plasticize the material, the temperature of the material is relatively high; and the cross section of the board mold is wide, the runner is long, especially the shaping section of the skinning foam board mold is longer. In addition, in the decomposition process of the foaming agent, the calcium and zinc stabilizer has the problem of zinc burning and the stabilizing effect is slightly poor, and the dosage is small. At present, lead salt stabilizers are more commonly used. Due to the wide cross-section of the mold, the long flow channel and the high heat generation of yellow foaming, the stabilizer requires high lead content and good stabilization effect, otherwise the products are prone to various types problem.
Foaming regulator: copolymerized with methyl methacrylate, ethyl acrylate, butyl acrylate, and styrene. Its molecular structure is a core-shell structure. It can be used as a processing aid in the formulation system to effectively reduce the plasticizing temperature and promote plasticization. Chemical effect, improve plasticization efficiency, increase melt strength, reduce melt pulsation, prevent melt fracture, and significantly improve the surface smoothness of products. Foaming regulator, through years of research and development and improvement, the process technology of the foaming regulator ACR is becoming more and more sophisticated, and the performance and quality are becoming more and more stable. According to the thickness of the foaming board, the thin plate should be plasticized quickly, and the thick plate should be used. It is a foaming regulator with high plasticized slow melt strength.
Foaming agent: Foaming agent is a substance that makes the object material pores. It can be divided into three categories: chemical foaming agent, physical foaming agent and surfactant: it can be added in small amounts to improve foaming quality and foam structure during production. A small amount of aluminum silicate can be added to zinc oxide as a foaming aid in order to reduce precipitation.