Yihua Brand PVC Resin Powder SG-5 Type - High Purity for Molding and Extrusion

Yihua PVC Resin SG-5 is a premium-grade suspension-polymerized polyvinyl chloride powder engineered for demanding industrial applications requiring exceptional processability and material consistency. With a controlled K-value range of 66–68 (ISO 1628-2), this resin delivers optimal melt flow stability and mechanical performance, making it ideal for high-volume production of rigid and semi-rigid plastic components.

‌Superior Material Properties‌
The SG-5 resin exhibits a uniform particle structure (D50: 100–150 μm) and high porosity (0.28–0.32 cm³/g), ensuring rapid plasticizer absorption and homogeneous mixing. Its low volatile content (<0.1% moisture by Karl Fischer titration) minimizes processing defects such as bubbles or surface imperfections. The resin’s high whiteness (CIE L* ≥92) provides excellent base coloration for pigmented products, while its narrow molecular weight distribution guarantees consistent melt viscosity across extended production runs. Thermal stability tests confirm a Vicat softening point of 80°C (ISO 306) and thermal decomposition initiation above 180°C (TGA analysis under nitrogen atmosphere), ensuring dimensional integrity in high-temperature environments.

‌Advanced Polymerization Technology‌
Produced through China’s proprietary suspension polymerization process, SG-5 resin leverages automated reactor systems with precision temperature control (±0.5°C) and multi-stage centrifugal drying. This technology achieves a bulk density of 480–520 kg/m³ (ISO 60) and eliminates oversized particles, resulting in free-flowing powder that facilitates automated feeding systems. Rigorous quality protocols, including real-time FTIR spectroscopy, maintain K-value consistency within ±1 unit across batches.

‌Application Versatility‌
Yihua SG-5 resin excels in diverse extrusion and molding applications. In construction, it produces pressure-rated piping systems (ISO 1167 compliant, 1.25 MPa rating) and weather-resistant window profiles that maintain ΔE<2 color stability after 6,000 hours of accelerated UV aging. For packaging solutions, the resin meets FDA 21 CFR 177.1950 standards for food-contact films and pharmaceutical blister packs, demonstrating <50 ppm total migration under EU 10/2011 testing protocols. Automotive manufacturers utilize SG-5 for underbody components that pass 1,000-hour salt spray corrosion tests (ASTM B117), while electronics producers rely on its inherent flame retardancy (UL94 V-0 rating) for cable conduits and junction boxes.

‌Optimized Processing Performance‌
Designed for energy-efficient production, SG-5 resin achieves full gelation within 90–120 seconds at 180°C (Brabender torque rheometer), enabling 15–20% faster extrusion speeds compared to conventional PVC grades. Its broad processing window (170–190°C with ±5% torque stability) accommodates both single-screw and twin-screw systems, reducing thermal degradation risks. Recommendations include using calcium-zinc stabilizers (2.5–3.5 phr) for eco-sensitive applications or lead-based systems (1.8–2.2 phr) for cost-driven projects. Post-processing data shows scrap rates below 0.8% in continuous operation, with plate-out accumulation controlled to <0.25% per 24-hour cycle.

‌Packaging & Storage Specifications‌
The resin is supplied in triple-layer kraft paper/polypropylene woven bags with UV-resistant liners, each containing 25.0±0.2 kg net weight. Pallets hold 40 bags (1,000 kg total) with reinforced corners for secure stacking. Storage in dry, ventilated warehouses (<40% RH, 10–30°C) preserves product integrity for 18 months post-manufacture. Transportation requires climate-controlled containers to prevent moisture absorption and thermal shock during transit.

‌Sustainability & Compliance‌
Yihua SG-5 meets global regulatory requirements including REACH, RoHS 3, and TSCA. The production process incorporates 30% recycled feedstock without compromising performance, aligning with circular economy principles. Energy consumption during manufacturing is maintained at ≤3.8 kWh/kg, certified by ISO 14064-1 carbon footprint audits.

‌Technical Support‌
Yihua’s polymer engineering team provides application-specific guidance, including customized K-value adjustments (±2 units) for specialty flow requirements and on-site troubleshooting for die lines or flow marks. Batch traceability via QR-coded packaging ensures rapid quality recalls if required.

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