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SPC (Stone Plastic Composite) flooring has become one of the fastest-growing rigid flooring solutions in global residential and commercial markets in 2026, with its performance, durability and compliance with international safety standards heavily relying on scientific raw material selection. For flooring manufacturers, choosing qualified, cost-effective and stable raw materials is the foundation to avoid product defects, meet local market regulations and build long-term brand reputation.
A high-performance SPC flooring formulation consists of three core components(PVC resin, PVC additives, Fillers), and their quality directly determines the final product’s dimensional stability, waterproof performance, impact resistance and environmental compliance.
Raw Material Category | Recommended Specification | Core functions |
Natural Stone Powder (Calcium Carbonate) | 400–600 mesh, pure white, no impurities, whiteness ≥93% | Provides structural rigidity, high density and excellent dimensional stability, prevents deformation under temperature and humidity fluctuations |
PVC Virgin Resin Powder | K-value 65–68, new virgin grade, no recycled impurities | Acts as the flexible binding matrix, ensures sufficient toughness, lock tensile strength and processing fluidity |
Calcium-Zinc Stabilizer | Non-toxic heavy metal-free, heat stability time ≥30 minutes at 200℃ | Prevents PVC decomposition during high-temperature extrusion, guarantees long-term anti-aging performance |
Lubricant G60 | White powder/melting point 55–65℃, acid value ≤5mg KOH/g, 100% internal lubrication, | Pure internal lubricant that reduces PVC molecular friction by 40%, shortens plasticizing time by over 20%, improves extrusion speed by 25–40% and supports 15% higher calcium carbonate filling rate. Optimal dosage: 0.3–1.0 phr, no negative impact on thermal plasticization time |
Polyethylene Wax (PE Wax) | Melting point 100–115℃, low volatility, narrow molecular weight distribution | High-efficiency external lubricant that forms a uniform isolation layer between melt and equipment inner wall, effectively prevents sticking to screws and barrels, improves product surface gloss and easy demolding. Optimal dosage: 0.1–0.5 phr, matched with G60 to achieve perfect internal-external lubrication balance |
Chlorinated Polyethylene (CPE) | CPE 135A grade, chlorine content 35±1%, high rubber elasticity | High-molecular-weight impact modifier that significantly improves the low-temperature brittleness of high-filling SPC formulations, increases floor impact strength by more than 30%, and avoids cracking during long-term storage and transportation. Optimal dosage: 3–6 phr |
PVC Processing Aid (ACR) | ACR-401/530 model, high molecular weight | Promotes uniform PVC plasticization under ultra-high calcium carbonate filling, eliminates internal stress concentration, improves dimensional accuracy by 30%, and reduces product warpage rate. Optimal dosage: 1.5–3.0 phr |
· Scientific Ratio Balance: The industry-proven optimal formulation is 70–75% stone powder, 20–25% PVC resin, 5–8% stabilizers and the above compounded additives. This 3:1 stone-to-resin ratio avoids the common defects of over-high stone content (brittleness, easy cracking) or over-high resin content (softness, poor thermal stability).
· Strict Impurity Control: Reject raw materials with recycled plastic, heavy metal residues or excessive moisture, which will cause bubbling, yellowing, poor surface clarity and formaldehyde emission exceeding safety limits.
· Certification Alignment: Prioritize raw material suppliers that provide complete REACH, RoHS and food-grade test reports, to support your final SPC flooring products to meet CE, FloorScore, ENF and other mainstream international certification requirements.
With over 20 years of deep expertise in PVC formulation design and SPC production troubleshooting, WSD CHEMICAL LIMITED stands as your one-stop reliable raw material partner for global SPC flooring manufacturers. We offer fully matched, pre-tested raw material packages covering PVC resin ,Ca/zn stabilizer,G60 lubricant, stearic acid, polyethylene wax, CPE 135A, ACR processing aids and other key additives, with stable annual production capacity and strict full-process quality control. Supported by large warehouses near Tianjin, Qingdao and Shanghai ,Ningbo,Shekou ports, we ensure standard orders are shipped within 5–7days, while customized formulation solutions are delivered within 7–10 days, helping you eliminate raw material matching errors, reduce production downtime, and maintain consistent high product quality across every production batch.
