The processability of PVC is not necessarily easy, Processing aids are unique additives which improve the processability of PVC dramatically with only small addition.
Acrylic process aids have very good compatibility with PVC and have longer chains than PVC, the number of entranglements will increase during processing and under shear.
These entranglements acting as physical Cross-links during processing and add rubbery characteristics to PVC compound.
Processing aids can generally provide the following benefits:
High molecular weights are also increasing the viscosity of the melt, as evidenced by higher torques and pressures during extrusions, higher torques in plastographs.
Processing aids can generally provide the following benefits:
| 1. Promote fusion and Add elasticity | 2. Add lubrication |
| Promote compound fusion Improve surface gloss Promotes die swell (prevents draw down) Improve hot melt strength Improve appearance of PVC foam Improve raw material dispersion |
Improve metal release Prevents build-up of product Prevents plate-out Delays fusion and reduce torque |
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