Wax Additives for Rigid PVC – Scratch Resistance and Process Optimization

Rigid PVC is widely used in pipes, window profiles, and sheets due to its mechanical strength, chemical resistance, and affordability. However, during extrusion and fabrication, rigid PVC can encounter surface defects, high friction, and processing difficulties.

Micronized wax additives help PVC formulators enhance surface scratch resistance, improve melt flow, and achieve uniform finish—all crucial for premium-quality products.

Industry Challenges

1. Surface Scratching: Scratches can occur during handling or downstream fabrication.

2. High Friction: Poor flow leads to die build-up and inconsistent extrusion.

3. Mold Release: Sticking in extrusion dies or molds reduces efficiency.

4. Aesthetics: Smooth, defect-free surfaces are critical for consumer perception.

Wax Additive Benefits

• Scratch Resistance: Forms a protective micro-layer, reducing abrasion during handling.

• Flow Improvement: Acts as a processing aid, lowering viscosity and easing extrusion.

• Surface Finish Enhancement: Produces uniform, smooth, and glossy surfaces.

• Mold Release & Anti-Sticking: Reduces defects and improves productivity.

Application Examples

• PVC Pipes: PE wax improved flow and reduced surface defects during extrusion of rigid pipes.

• Window Profiles: FT wax enhanced surface smoothness and scratch resistance in architectural profiles.

Technical Considerations

• Particle Size: Fine wax (<10 μm) ensures uniform dispersion without haze.

• Wax Type: PE for balanced flow; FT for higher scratch resistance.

• Processing Temperature: Waxes must remain stable during PVC processing (~180–200°C).

Rigid PVC products demand smooth surfaces, process reliability, and scratch resistance. Wax additives are key to achieving these requirements.

Contact our technical team today to find the optimal wax additive for your rigid PVC formulations. We provide tailored solutions and samples for evaluation.