PVC Calcium-Zinc Stabilizer (Specially for Transparent Articles) SD-CZ602T

Model: SD-CZ602T

Type: Powdered composite calcium-zinc thermal stabilizer, lead-free & cadmium-free eco-grade. Developed for transparent PVC articles, featuring high clarity, low haze, excellent initial color hold and balanced lubrication.

Product Description

This product is a composite calcium-zinc thermal stabilizer based on calcium stearate and zinc stearate, compounded with high-efficiency co-stabilizers, polyols, antioxidants and specially formulated internal & external lubricants. Lead-free and cadmium-free, it is suitable for rigid and semi-rigid transparent PVC articles, such as transparent sheets, transparent pipes, transparent injection-molded parts and transparent packaging profiles. It boasts good light transmittance and low haze, low migration without impairing transparency, as well as superior long-term thermal stability to restrain late-stage blackening. Compliant with RoHS, REACH and SVHC requirements, suitable for calendering, extrusion, injection molding and other transparent processing technologies.

Physical & Chemical Properties

Recommended Dosage (phr, based on 100 parts PVC resin)

• Transparent rigid sheet / calendered sheet: 2.0～0 phr
• Transparent rigid pipe / profile: 2.5～5 phr
• Transparent injection-molded article: 3.0～0 phr

Compounding suggestion: Epoxidized Soybean Oil (ESO, 2～6 phr) can be added for synergistic stabilization. Low-color ESO is preferred for transparent systems to avoid yellowing. Fillers and additives that impair clarity are not recommended.

Processing & Handling Instructions

1. Feeding sequence: PVC resin → Processing aids, impact modifiers → Calcium-zinc stabilizer → Other additives, high-speed mixing.
2. Processing temperature range: Calendering 160～180℃; Extrusion 165～185℃; Injection molding 170～190℃.
3. Features: Lubrication system optimized for transparent formulations; no whitening effect on light transmittance, low migration and low blooming tendency, clean initial color for crystal-clear finished products.
4. Note: Pigments, plasticizers and processing aids in the formula will affect haze and color. A lab trial is recommended before mass production for transparent formulas.

Compliance Information

• Free of lead, cadmium, barium and other heavy metals; Phthalate-free (formula controllable)
• Compliant with RoHS 2.0 and REACH SVHC requirements. SGS test reports available upon request.

Packaging, Storage & Shelf Life

• Packaging: 25 kg kraft paper bag with PE inner liner (powder);
• Storage: Store in cool, dry and ventilated area. Keep away from moisture, direct light and strong acids.
• Shelf life: 12 months (for unopened original packaging)
• Transportation: Ordinary chemical, non-hazardous goods. SGS and SDS available separately.

Disclaimer

This TDS is a general template for calcium-zinc stabilizers specially for transparent articles. Specifications vary by grade and are for reference only, not for acceptance. Official shipment shall be subject to the manufacturer’s COA.