PVC foam board, also known as snow board, has good adiabatic, thermal insulation, sound insulation, light load-bearing properties, due to other insulation materials, and easy to operate, high mechanization, time-saving, labor-saving features. There are many users in the production of PVC foam board raw materials are what? The following PVC foam board manufacturers Gege technical staff to answer you in detail.
The main raw materials for the production of PVC foam board are: PVC resin, stabilizer, foam conditioner, foaming agent, pigment, and filler.
PVC resin: PVC generally uses type 8 resin, which has fast gelation speed during processing, relatively low processing temperature, stable product quality and easy density control. In recent years, many manufacturers have switched to type 5 resin.
Stabilizer: in the PVC foam sheet production process, in order to make the material fully plasticized, the material temperature is high; and sheet mold cross-section is wide, long runners, especially the crust foam sheet mold shaping section is long, in addition, the foaming agent in the decomposition process also calcium and zinc stabilizers exist zinc burning problems and slightly worse stabilization effect dosage is also less. At present, more applications or lead salt stabilizer, foam board because of the wide cross-section of the mold, long runners and yellow foam decomposition heat generation, requiring high lead content of stabilizer, good stabilization effect, otherwise the products are prone to various problems.
Foam regulator: methyl methacrylate, ethyl acrylate, butyl acrylate, styrene copolymerization, its molecular structure is a core-shell structure, in the formulation system as a processing aid can effectively reduce the plasticization temperature, promote the plasticization effect, improve plasticization efficiency, improve melt strength, reduce melt pulsation, prevent melt rupture, and significantly improve the surface smoothness of the product. Foam regulator, through years of research and development and improvement, foam regulator ACR process technology is becoming more and more sophisticated, the quality of performance is becoming more and more stable, foam board according to the thickness, thin board should be used to plasticize fast, thick board should be used to plasticize the slow dissolved body strength of the foam regulator.
Foaming agent: foaming agent is the substance that makes the object material pore, it can be divided into three categories: chemical foaming agent and physical foaming agent and surfactant: in production to improve the quality of foaming and foam structure can add a small amount of foaming additives zinc oxide, to reduce precipitation can add a small amount of aluminum silicate.
Filler: light calcium carbonate can be used, no need to use active calcium, the choice of high mesh number is the main.
Pigment: This is well understood, for coloring the plates.