Nicho Company Limited
PVC PROCESSING AIDS

Specification
Items

SC-01

SC-02

Molecular weight, g/mol

1,450,000

1,250,000

Viscosity , CP

2.53

1.98

Volatile Matter , %

1.00

0.70


PVC processing Aids are high molecular weight MMA copolymers typically from 200.000 to 3 millions g/mol. These products have excellent compatibility with PVC. They are used to speed up the gelation times, to achieve better homogeneity of the melt, and improve its mechanical properties (more elasticity, higher strength to prevent tearing). The efficiency regarding the mechanical properties is generally related to the molecular weight.

These copolymers containing styrene have a PVC compatible phase and a PVC incompatible phase. The presence of styrene in these processing aids brings some lubrication effect. The releasability from hot metal parts such as dies, calendering rolls, injection moulds, is improved without the disadvantage of plate-out brought by many external lubricants.


Process aids can generally provide the following benefits:
• 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