Main raw material of PVC heat shrinkable film―PVC resin

PVC heat shrinkable film is a plastic film made of PVC resin as the main raw material and processed by a special process. Its characteristic is heat shrinkage. The raw and auxiliary materials for the production of PVC heat shrinkable film are stabilizers, plasticizers, modifiers, lubricants, and colorants in addition to PVC resin. Today, I will work with the editor to learn more about what type of PVC resin should be used when producing PVC heat shrinkable film.

The choice of PVC resin model is the key to the production of PVC heat shrinkable film, and a resin with good comprehensive performance and easy to plasticize should be selected. Based on more than 20 years of industry experience of Guangyi Plastics, the choice of PVC-SG5 and PVC-SG6 resins in the production of PVC heat shrinkable film can meet the requirements of the product for heat shrinkage. As far as the molecular weight of the resin is concerned, the general molecular weight increases, and the thermal stability of the product, blown film calenderability, tensile strength, impact strength and other properties will be improved to varying degrees, and the physical properties of plastic products can also be improved. However, the molecular weight is not as large as possible. If the molecular weight is too large, the plasticizing temperature will increase and the fluidity and ductility of the resin will deteriorate, which will cause difficulties for the thermally stable system and secondary inflation.