Environmentally Friendly Calcium-Zinc Stabilizer
Primary Functions
1.Inhibits Thermal Degradation and Hydrochloric Acid Release
PVC undergoes hydrochloric acid release during high-temperature processing, causing discoloration and embrittlement. Calcium-zinc stabilizers effectively capture free chlorine ions, neutralize released HCl, and terminate its autocatalytic action, significantly delaying PVC’s thermal degradation process.
2.Enhancing Thermal Stability and Initial Coloration
This stabilizer exhibits excellent initial whiteness and long-term thermal stability, effectively preventing yellowing or discoloration of PVC products during processing. It is particularly suitable for white or light-colored items. Its thermal stability rivals that of lead salt stabilizers.
3.Improving Light Stability and Weather Resistance
Calcium-zinc stabilizers absorb ultraviolet radiation, slowing PVC aging and degradation under sunlight or outdoor exposure. This extends product lifespan and provides excellent weather resistance.
4.Antioxidant and Anti-Sulfur Contamination
The antioxidant components inhibit PVC oxidation reactions. In sulfur-containing environments (e.g., acid rain regions), they effectively prevent product blackening, outperforming traditional lead salt stabilizers.
5.Improved Processing Performance
- Lubrication Effect: Calcium/zinc stearate components provide internal lubrication, reducing melt viscosity, enhancing flowability, and minimizing equipment wear.
- Promotes Plasticization: Facilitates uniform plasticization and rapid melting of PVC resin, resulting in smoother product surfaces.
- Excellent Dispersibility: Enhances the dispersion of fillers (such as calcium carbonate) in PVC, improving the mechanical properties of products.
- Environmental Protection and Safety
Free from toxic heavy metals like lead, cadmium, and organic tin. Complies with stringent requirements for food contact materials (e.g., FDA approval) and non-toxic applications such as electrical cables, medical devices, and children’s toys.
The eco-friendly calcium-zinc stabilizer is a non-toxic, environmentally friendly plastic additive primarily used in the processing of polyvinyl chloride (PVC) products. It is designed to replace traditional toxic lead salts or organic tin stabilizers. Its core function is to enhance the thermal stability, light stability, and processing properties of PVC materials during manufacturing and use, while meeting international environmental regulations such as ROHS and REACH.
The eco-friendly calcium-zinc stabilizer is a multifunctional additive that combines heat stability, light stability, lubrication, and environmental friendliness. It is widely used in pipes, profiles, cable compounds, toys, packaging materials, and other applications.
