23 октября 2020 г., 8:55:08 MSK
PVC cabinet board is also called Chevron board and Andy board. Its chemical composition is polyvinyl chloride (Polyvinyl chloride), so it is also called foam polyvinyl chloride board. Widely used in passenger car, train car roof, box core layer, interior decoration board, building exterior wall board, interior decoration board, office, residential, public building partition, commercial decoration frame, clean room board , Ceiling panels, screen printing, computer lettering, advertising signs, exhibition boards, sign boards, photo album boards and other industries and chemical anti-corrosion engineering, thermoformed parts, cold storage boards, special cold insulation engineering, environmental protection board molds, sports equipment, breeding materials , Waterfront moisture-proof facilities, water-resistant materials, art materials and various lightweight partitions instead of glass ceilings. In PVC foam products, the purpose of adding ultra-high molecular weight polymers: one is to promote the plasticization of PVC; the other is to increase the melt strength of the PVC foam material, prevent the merging of bubbles, and obtain a uniformly foamed product ; The third is to ensure that the melt has good fluidity to obtain products with good appearance. Due to the different products of different foaming product manufacturers, the equipment, processes, raw materials and lubrication systems used are different, we have developed foaming regulators with different properties to meet the different needs of users. The key factor to improve the quality of PVC foam board is to increase the melt strength of PVC. From the analysis of the processing characteristics of polymer materials, there are many ways to improve the melt strength of PVC, but the more effective way is to add additives to improve the melt strength and reduce the processing temperature. PVC is an amorphous material. As the melt temperature increases, the melt strength decreases. On the contrary, as the melt temperature decreases, the melt strength increases, but the cooling effect is limited and only plays an auxiliary role.
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