how to improve PVC advertising board qualityPVC foam advertising board, also known as the chevron board and Andy board, its chemical composition is Polyvinyl chloride, so it is also known as foam PVC board. It is widely used in bus, railway car ceiling, box core layer, interior decoration board, building exterior wall board, interior decoration board, office, residence, building compartment in public places, commercial decoration frame, dust-free room board, ceiling board, screen printing, computer lettering, advertisement sign, exhibition board, sign board album board And other industries and chemical anti-corrosion engineering, hot formed parts, cold storage boards, special cold insulation engineering, environmental protection board molds, sports equipment, breeding materials, coastal moisture-proof facilities, water-resistant materials, art materials and various light partitions instead of glass ceiling.
In PVC foam products, the purpose of adding UHMW polymer is: first, to promote the plasticization of PVC; second, to improve the melt strength of PVC foam materials, prevent the combination of bubbles, so as to get uniform foam products; third, to ensure that the melt has good fluidity, so as to get products with good appearance. Due to the different products of different foaming products manufacturers, the equipment, process, raw materials and lubrication system used are different, so we 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 improve the melt strength of PVC. From the analysis of 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 a kind of amorphous material, the melt strength decreases with the increase of melt temperature, on the contrary, the melt strength increases with the decrease of melt temperature, but the effect of cooling is limited and only plays an auxiliary role.