PVC heat shrinkable film machine can assemble bulk products into whole, also suitable for single product packaging. Secondly, the PVC heat-shrinkable film closely adheres to the appearance of the package, giving people a proper sense of viscose, making the product more beautiful, crisp and shiny. The following PVC heat shrinkable film manufacturers mainly introduce its production process points:

  • 1. PVC heat shrinkable film products are different from soft and hard. In general, PVC products with a plasticizer dosage below 10PHR are called hard products; PVC products with a plasticizer dosage between 10 and 40PHR are called semi-hard products; PVC products are called soft products.
  • 2. Because PVC is a heat-sensitive plastic, heat stabilizers cannot be used in the formulation. In general PVC formulations, the amount of heat stabilizer is 5 ~ 8PHR. If there is less heat stabilizer, it is not enough to hinder the differentiation of PVC at the temperature of hot melt molding; if there is more heat stabilizer, it will increase the temperature of hot melt activity.
  • 3. To improve the melt processability of PVC, the PVC formula can be melt processed, and processing aids should be added to the PVC formula. The practice has proved that hard PVC products can not be melt-molded without processing aids, and soft PVC products can hardly be formed without or lacking processing aids.