Basics knowledge of PVC foaming regulators

A PVC foaming regulator is actually an acrylic resin based processing aid that has all the basic functions of a PVC processing aid, with the difference compared to conventional processing aids. PVC foaming regulator has higher molecular weight and higher viscosity
As a common product, PVC foaming regulator, how much do you know about its basic knowledge? Let's take a look at the basic knowledge of PVC foaming regulators.

1. The chemical composition of PVC foaming regulator. A PVC foaming regulator is actually an acrylic resin based processing aid that has all the basic functions of a PVC processing aid, with the difference compared to conventional processing aids. PVC foaming regulators have higher molecular weight and higher viscosity.
2. The main function of foaming regulator in PVC foam products. Promote the plasticization of PVC, and improve the melt strength of PVC foam materials, prevent bubble coalescence, and obtain a uniform foamed product. Preventing insufficient melt strength results in foam sheet foaming, longitudinal pimples and ensuring good melt flow for good product appearance.
3. A simple and effective method for checking melt strength. To determine whether the melt strength is insufficient, the direct method is to wrap the fingers in the middle roll of the sheet and press the three rolls back, the melt strength is good, and the elasticity can be felt when pressing. If the press is hard to bounce back, it indicates poor melt strength.