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25 2025-6
Characterization of Imbalances Among Additives in PVC Foam Products 1. StabilizersThe most commonly used stabilizers in PVC foam products are One-Pack Lead stabilizers and calcium-zinc stabilizers. With increasing environmental regulations and the improving cost-performance ratio of calcium-zinc stabilizers, their application is becoming more widespread.
16 2025-6
Common Evaluation Methods for the Stability of PVC Stabilizers Stabilizers are one of the most essential and indispensable materials in PVC products. Unlike the past, where the market was dominated by tribasic lead sulfate, dibasic lead stearate, lead stearate, and barium stearate, today's stabilizers have evolved. Except for transparent products and a few soft products that still use organotin or liquid calcium-zinc-barium-cadmium stabil…
3 2025-6
How to Optimize the Ratio of Zinc Stearate and Calcium Stearate in PVC Applications In a calcium-zinc stabilizer system, there are distinct differences in the lubrication behavior between zinc stearate (ZnSt) and calcium stearate (CaSt), which are closely related to their compatibility with PVC during processing, migration rate, and functional stages. Below is an analysis of their lubrication mechanisms and formulation optimization recommendations:1. Lubricatio…
29 2025-5
How to Maintain the Balance of Internal and External Lubrication in PVC Formulations When formulating PVC (polyvinyl chloride) materials, one of the key challenges lies in achieving a proper balance between internal and external lubrication. But what does this balance actually look like? How can we tell if our formulation is well-balanced, and how do we make adjustments when it's not?
19 2025-5
How to Improve the Surface Gloss of PVC-U Pipes and Profiles?-2 2.2 Mold Cavity Surface Precision The surface finish of the mold cavity directly determines product gloss: - Polishing to a roughness ≤Ra 0.2 μm is standard. - Electroplating the cavity improves gloss and extends mold lifespan.
19 2025-5
How to Improve the Surface Gloss of PVC-U Pipes and Profiles?-1 The surface gloss of UPVC products is influenced by factors such as formulation, raw materials, molds, and processing during production. To achieve superior surface gloss, it is essential to comprehensively address these constraints through rational control of all aspects.1. Factors Affecting Surface Gloss 1.1 Formulation and Raw Materials
15 2025-5
Comparison of PVC Resin Production Processes OverviewAmong the two main raw-material routes for PVC resin production—the ethylene route and the calcium carbide route—each has its own strengths and weaknesses.
14 2025-5
Common Issues and Solutions in Pipe Production Using Calcium-Zinc Heat Stabilizers A. Raised Blotch-Like Protrusions on the Pipe Wall (Bubble-Like)Possible Causes