1, ABS has good toughness and strength, good fluidity and easy molding. PVC is polyvinyl chloride, which has good water resistance, acid and alkali resistance, good chemical resistance and low price. The disadvantage is that the production technology is high and there are special requirements for molds or screws.

2.PVC resin is a kind of thermoplastic with amorphous structure. Under ultraviolet light, hard PVC emits light blue or purple-white fluorescence, while soft PVC emits blue or blue-white fluorescence. When the temperature is 20℃, the refractive index is 1.544 and the specific gravity is 1.40, while the density of products containing plasticizers and fillers is usually in the range of 1. 15 ~ 2.00.