PVC Resin SG3 (K71-72)

K-Value: 71-72 (Average Degree of Polymerization: 1251-1370)

Packaging: 25kg/bag

Bastone PVC Resin SG3 is a premium-grade suspension polyvinyl chloride with K-value 72-71, ideal for rigid pipe extrusion, profiles, and construction applications. Sourced from leading Chinese manufacturers (XINFA, TIANYE, DAGU), our SG3 resin offers excellent processing stability, superior mechanical strength, and consistent quality.

With ready stock at major seaports, free sampling, and flexible logistics solutions, we ensure fast delivery and reliable supply for your production needs. Perfect for water pipes, electrical conduits, window profiles, and rigid packaging applications.

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Description

PVC SG3 is a high-performance suspension PVC resin engineered for rigid applications. With a K-value of 71-72 and viscosity of 127-135 mL/g, this premium-grade PVC resin delivers exceptional mechanical strength and processing stability for demanding industrial uses.

Our PVC resin SG3 meets stringent quality standards with an average polymerization degree of 1251-1370 and apparent density ≥0.45 g/mL. The low impurity particle count (≤16 pcs) and minimal volatile content (≤0.30%) ensure consistent product quality. With excellent whiteness (≥78%) and high plasticizer absorption (≥26g/100g resin), PVC SG3 offers superior processing characteristics for manufacturers.

PVC SG3 specifications include controlled residual VCM content (≤5 µg/g) meeting both industrial and food-grade requirements. The resin features optimal sieve analysis with ≥95% pass through 63μm mesh, ensuring smooth processing and excellent surface finish. Fish eyes are limited to ≤20 pcs/400cm², while water extract conductivity stays below 5 µS/(cm·g), guaranteeing premium end-product quality.

PVC resin SG3's higher K-value (71-72) compared to SG5 (68-66), SG7 (62-60), or SG8 (59-55) provides superior rigidity and mechanical strength essential for pressure pipes and structural profiles. While lower grades like SG5 suit flexible applications and SG7-SG8 work for soft products, PVC SG3's higher molecular weight delivers the impact resistance and dimensional stability required for rigid pipe systems, window profiles, and construction materials.

The higher polymerization degree of PVC SG3 ensures excellent long-term durability under stress, making it the optimal PVC resin grade for water supply pipes, drainage systems, and electrical conduits where structural integrity is critical. This grade perfectly balances processability with mechanical performance, offering easier extrusion than ultra-high K-value grades while maintaining the strength needed for rigid applications.

As authorized distributors of XINFA, TIANYE, and DAGU, Bastone supplies genuine PVC resin SG3 with consistent quality and competitive pricing. We maintain ready stock at major seaports, offering both ethylene-based and carbide-based PVC SG3 options in 25kg bags.

Our comprehensive service includes free sample testing, technical consultation, and flexible logistics solutions from local warehouses. With years of experience in PVC resin distribution, we ensure fast delivery and reliable supply for your production needs.

Choose Bastone for premium PVC SG3 supply – your trusted partner for high-quality PVC resin solutions. Contact us today for technical data sheets and product samples.

Factory and Activities

Why Choose Our PVC Resin-SG3?

Quality Standards and Certifications for PVC SG3

Our PVC SG3 resin meets international quality standards with residual VCM content below 5 µg/g, suitable for both industrial and food-contact applications. Each batch of PVC SG3 undergoes rigorous testing for key parameters including viscosity, K-value, and impurity particles to ensure consistent performance.

The controlled 1,1-dichloroethane content (≤150 mg/kg) and low fish eye count (≤20 pcs/400cm²) in our PVC SG3 guarantee superior surface finish in final products. These specifications are critical for manufacturers serving demanding sectors like potable water systems and medical-grade applications.

Split-screen comparison showing two identical clear liquid samples in laboratory beakers, with Stone TXIB and Eastman TXIB labels
Modern quality control laboratory with technician analyzing TXIB samples using advanced testing equipment


Supply Chain Reliability for PVC SG3

Bastone maintains strategic inventory of PVC SG3 across major Chinese seaports, ensuring consistent availability for your production schedules. Our direct partnerships with manufacturers XINFA, TIANYE, and DAGU provide supply security and competitive pricing advantages for PVC SG3 procurement.

We offer flexible delivery options for PVC SG3, from full container loads to consolidated shipments, supported by our dedicated logistics network. Technical support and quality documentation accompany every PVC SG3 shipment, ensuring smooth customs clearance and production integration at your facilities.

PVC SG3 vs. Other Grades: Making the Right Choice


PVC SG3's K-value of 71-72 provides 20% higher tensile strength compared to SG5 (K-value 68-66), making it essential for pressure-rated pipe systems. While SG5 suits semi-rigid applications and SG7-SG8 serve soft product markets, PVC SG3 delivers the mechanical properties required for structural applications where failure is not an option.

The higher molecular weight of PVC SG3 results in superior long-term creep resistance and impact strength, critical factors for underground pipes and outdoor profiles. Unlike lower K-value grades, PVC SG3 maintains dimensional stability under load, reducing warranty claims and ensuring product longevity in construction applications.

Split-screen comparison showing two identical clear liquid samples in laboratory beakers, with Stone TXIB and Eastman TXIB labels
Modern quality control laboratory with technician analyzing TXIB samples using advanced testing equipment

Superior Processing Performance of PVC SG3

PVC SG3 resin offers exceptional processing stability during extrusion and molding operations. The optimal K-value of 71-72 ensures smooth material flow through extruders while maintaining sufficient melt strength for dimensional control. This balance makes PVC SG3 particularly efficient for continuous production runs, reducing downtime and scrap rates.

Manufacturing facilities appreciate PVC SG3's consistent batch-to-batch quality, which translates to predictable processing parameters and stable output. The resin's high plasticizer absorption rate of ≥26g/100g allows for excellent additive incorporation, ensuring uniform product properties throughout production cycles.

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