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Views: 30 Author: Site Editor Publish Time: 2026-09-20 Origin: Site
Content Menu
● Why K-Value Matters in PVC Formulation
● Main Applications of PVC Resin SG-3
>> Flexible PVC Film and Artificial Leather
>> Cable Insulation and Sheathing
● Practical Processing Checklist for Buyers
● Quality Control and Supply-Side Considerations
● Expert View: Is SG-3 the Right Grade?
● Contact Shandong Polymer Additives
● 1. What is PVC Resin SG-3 used for?
● 2. What is the K-value of TIANYE PVC Resin SG-3?
● 3. How should SG-3 PVC resin be stored?
● 4. What packaging is available?
● 5. Should buyers test SG-3 before placing a bulk order?
PVC Resin SG-3 is a high-molecular-weight suspension-grade polyvinyl chloride resin used in flexible films, hoses, cable compounds, artificial leather, and other PVC products requiring strength, plasticizer absorption, and stable processing. Based on the available product information, TIANYE PVC Resin SG-3 is manufactured by Xinjiang Tianye and supplied by Shandong Polymer Additives Co., Ltd., a Weifang-based PVC additives and compounds company with more than 360 employees and 37 R&D professionals.
PVC Resin SG-3 is a white, free-flowing powder produced through suspension polymerization. Its relatively high molecular weight gives finished PVC products a useful balance of mechanical strength, flexibility, durability, and processing performance.
The listed product specifications include:
| Property | Typical specification |
|---|---|
| K-value | 71–72 |
| Viscosity number | 127–135 mL/g |
| Average polymerization degree | 1,251–1,370 |
| Volatile matter, including water | ≤0.30% |
| Apparent density | ≥0.45 g/mL |
| 250 μm sieve residue | ≤2.0% |
| Fish eyes | ≤20 per 400 cm² |
| Standard packaging | 25 kg kraft paper bag |
These values are published for the TIANYE SG-3 product and should be confirmed against the latest certificate of analysis, technical data sheet, and batch documentation before commercial production.
The K-value is an important indicator of PVC molecular weight and solution viscosity. A K-value of 71–72 generally indicates a resin capable of delivering good strength and melt performance, although the final result depends on the entire formulation.
From a formulator's perspective, SG-3 should not be selected by K-value alone. The following factors also influence production performance:
- Plasticizer absorption
- Apparent density and powder flow
- Residual moisture
- Fish-eye and impurity levels
- Fusion behavior
- Extruder design and residence time
- Stabilizer, lubricant, filler, and modifier compatibility
This is where technical support becomes valuable. Shandong Polymer Additives states that it supports customers with formulation design, extruder selection, and process adjustment, rather than treating resin supply as a purely transactional purchase.
SG-3 can serve as the base resin for flexible films, coated fabrics, artificial leather, and soft plastic articles. Its molecular weight helps support tensile strength and dimensional stability after plasticization.
The final formulation normally requires careful selection of:
- Plasticizer type and dosage
- Heat stabilizer
- Internal and external lubricants
- Pigments or fillers
- Processing temperature
- Calendering or extrusion conditions
For hoses and tubing, the resin must provide a good balance between flexibility and resistance to tearing or deformation. Consistent powder quality is particularly important because variations in fusion or plasticizer absorption can affect wall thickness and surface finish.
Manufacturers should evaluate the resin under their actual production conditions instead of relying only on laboratory data.
SG-3 may be used in PVC cable compounds where the resin forms the polymer matrix around plasticizers, stabilizers, fillers, and other functional additives. The finished compound must be tested for electrical insulation, flexibility, aging resistance, flame performance, and dimensional stability according to the applicable cable standard.
A resin specification alone does not guarantee compliance with a finished-product standard. Product testing remains essential.
Before approving SG-3 for regular production, I recommend the following procedure:
1. Request a current COA for the exact production batch.
2. Check moisture and powder flow before feeding the material.
3. Run a controlled laboratory formulation using the intended plasticizer and stabilizer system.
4. Record fusion torque, gelation time, and melt appearance.
5. Conduct a pilot trial on the target extruder, calender, or compounder.
6. Test finished products for tensile strength, elongation, hardness, aging, and application-specific requirements.
7. Compare multiple batches to assess consistency before signing a long-term supply agreement.
This approach reduces the risk of approving a resin based only on a datasheet while overlooking equipment and formulation differences.
Shandong Polymer Additives describes its operation as using strict quality control systems and modern fully automatic production lines. The company is located in Weifang, Shandong Province, China, and supplies PVC additives, PVC resin, compounds, and related materials.
For international buyers, a professional qualification process should also include:
- Batch traceability
- Inspection before shipment
- Packaging and pallet requirements
- Container loading plan
- Incoterms and lead time
- Sample approval
- Technical response time
- Documentation for customs and compliance
The published product page identifies TIANYE SG-3 as compliant with GB/T 5761-2018 and lists 25 kg kraft paper packaging. Buyers should request the latest compliance documents because specifications, packaging, and availability can change. [1](#https://www.pvcchem.com/TIANYE-PVC-Resin-SG-3-pd150605238.html)
SG-3 can be a practical choice when the application requires higher strength, reliable plasticizer incorporation, and stable processing. However, the best PVC resin grade depends on the finished product, equipment, regulatory requirements, and target cost.
For a purchasing decision, the most reliable method is to combine:
- Technical data
- A representative sample
- Pilot-scale processing
- Finished-product testing
- Supplier technical support
If you are sourcing PVC Resin SG-3, PVC processing aids, impact modifiers, stabilizers, lubricants, or formulation support, contact Shandong Polymer Additives for the latest quotation, sample availability, COA, and application recommendations.
Frequently Asked Questions
It is used in flexible PVC film, soft hoses, cable compounds, artificial leather, and other plasticized PVC products.
The published K-value is 71–72. [1](#https://www.pvcchem.com/TIANYE-PVC-Resin-SG-3-pd150605238.html)
Store it in a dry, well-ventilated warehouse, protected from moisture, direct sunlight, and heat. Keep bags on pallets and prevent powder caking.
The listed standard packaging is 25 kg kraft paper bags. Bulk packaging should be confirmed with the supplier.
Yes. A sample trial and pilot production test are recommended to confirm compatibility with the buyer's formulation and equipment.
1. [Shandong Polymer Additives Co., Ltd. — TIANYE PVC Resin SG-3 product page]
2. [WSD Chemical — PVC Resin SG-3 Suspension Grade Product Overview]
3. Company information supplied by Shandong Polymer Additives Co., Ltd.
