Effect of plasticizer content on PVB

Effect of plasticizer content on PVB. PVB, also known as polyvinyl butyral, is a thermoplastic resin. On the market, there are two common types of PVB at present. One is powdered PVB, which can be used in ink and other fields. One is film like PVB, which can be used to make laminated glass or toughened glass. The addition of plasticizer can change the powder PVB into film PVB. PVB film can be produced by adding plasticizer to powdered PVB. So in the production process, does the change of plasticizer content have an impact on PVB? Today, Xiaobian will introduce the impact of the change of plasticizer content on PVB.

For powdery PVB, the production of PVB film needs many steps. After dissolving, plasticizer needs to be added, and the finished PVB film can be formed after mixing and extrusion. The film quality is also different with the content of PVB added. For powder PVB, it is necessary to use plasticizer with high polarity for mixing production. Because plasticizers with high polarity are also very compatible with PVB. Within the allowable range, by changing the content of plasticizer incorporated into PVB, the properties of the produced PVB can be changed. With the increase of the content of plasticizer, the tensile strength of PVB film decreases, the elongation at break increases, the glass transition temperature decreases, and the melt flow rate increases.