Mechanism of action of new type PVC:
There are three main ways of PVC processing aid, which is to promote the melt, melt rheological properties and the function of lubrication.
1, promote resin melting: PVC resin in the shear stress, the process of modification agent first melting and adhesion in the PVC resin particles surface, based on its compatibility and high molecular weight, so that the viscosity and friction increase, so that the shear force and heat transfer to the entire PVC resin, accelerate PVC melt.
2, melt rheological modification: PVC melt has the disadvantages of poor strength, poor ductility and melt fracture, etc., and the process of modifying agent can improve the melt above problems. The mechanism for the increase of viscoelastic melt: PVC, thereby improving the die swell and improve melt strength
3, to give the lubrication function: processing and modification agent and polyvinyl chloride compatible part of the first melt to promote the melting effect; and the PVC incompatible part is to melt resin system, so as to improve the release of.