Liquid Calcium-Zinc Stabilizer Systems for Flexible and Semi-Rigid PVC
WANSYN liquid calcium-zinc PVC stabilizer systems are developed for formulations requiring heat stability, consistent dosing, uniform dispersion and a controllable processing window. Selection should start from the complete formulation and end use, not the application name alone. WANSYN's modern stabilizer base has annual capacity of 50,000 metric tons.
Why Processors Evaluate Liquid Ca-Zn
- Lead-free calcium-zinc direction for suitable PVC applications
- Initial-color and heat-stability support under matched conditions
- Uniform dispersion and controlled metering in liquid-additive systems
- Stable processing that can help control torque or pressure variation
- Options for different flexibility, color, odor and ageing targets
Benefits are grade- and formulation-dependent. Resin, plasticizer, lubricant, filler, pigment, recycled content and heat history can all change the result.
Typical Application Scope
| Application | Examples | Review points |
|---|---|---|
| Film and sheet | Calendered, printable and decorative film | Color, odor, surface, deposits and printability |
| Wire and cable | Insulation and sheathing compounds | Heat ageing, electrical and market requirements |
| Hose and tubing | Flexible hose and semi-rigid tubing | Fusion, surface, flexibility and service conditions |
| Coated products | Artificial leather, fabric, flooring and wallcovering | Coating, odor, exudation and adhesion |
| Plastisol/molded | PVC paste, selected footwear, toys and molded articles | Viscosity, gelation, migration and documents |
Food-contact, toy, medical, drinking-water or another regulated use must be declared so the applicable grade and documents can be checked.
Key Formulation Variables
- PVC resin type, K-value or emulsion grade
- Plasticizer chemistry, loading and target hardness
- Filler, pigment, flame-retardant and functional additives
- Lubricant, co-stabilizer, antioxidant and chelator package
- Current stabilizer chemistry and dosage
- Process, temperatures, residence time, output and dosing method
- Target color, transparency, odor, ageing and surface
What to Measure During a Trial
- Initial color, dynamic heat stability and aged color
- Torque, pressure, motor load, coating viscosity, output and dosing stability as applicable
- Plate-out, deposits, bloom, exudation, oil spots and defects
- Odor after processing and conditioning
- Flexibility, mechanical, electrical, migration or application-specific tests
Use the current system as control, change one major variable at a time and judge conditioned finished products.
Ca-Zn Versus Methyl-Tin Selection
These are different chemical systems. Transparent rigid PVC with demanding clarity may use methyl tin, while many flexible and semi-rigid projects evaluate liquid Ca-Zn. A universal one-for-one replacement should not be claimed; validate dosage, co-stabilizer, lubrication, color, heat stability and finished-product performance.
Dosage, Handling and Supply Information
WANSYN can recommend a starting trial after formulation review. Final dosage must be established on the intended line. Confirm pump, piping, weighing and mixing compatibility.
| Appearance | Liquid |
|---|---|
| Current packing | 220 kg net drum and 1,100 kg net IBC as currently listed; confirm availability |
| Storage reference | 12 months under stated conditions; confirm current TDS |
| Documents | TDS, SDS and available grade-specific reports on request |
RoHS, REACH, SVHC, heavy-metal, food-contact, toy or medical statements must be confirmed for the grade, formulation, use and market.
Information Required for Grade Matching
- Application and finished use
- Resin or plastisol grade and complete formulation
- Plasticizer, filler, pigment, lubricant and additives
- Current stabilizer, dosage and observed problem
- Process, dosing system, equipment and temperatures
- Color, clarity, odor, flexibility and ageing targets
- Required documents, packing, trial quantity and annual volume
Frequently Asked Questions
Is one liquid Ca-Zn grade suitable for every flexible PVC use?
No. Cable, film, leather, hose, plastisol and flooring can require different systems.
Can it improve dosing consistency?
A compatible liquid system can support metering and dispersion, but pump, storage and mixing must be controlled.
Can it reduce yellowing or torque variation?
It can be evaluated after resin, plasticizer, lubrication, filler and process review.
Is it low odor?
Odor depends on grade and complete formulation; state the test method and target.
Can it replace barium-zinc or methyl tin?
Do not assume a direct replacement; validate dosage, color, heat stability and processing.
Request a Liquid Ca-Zn Review
Send application, formulation, plasticizer, current stabilizer, process conditions, target and documents to info@wxchemgroup.com or the WANSYN contact page.
