Factory and Activities
PetroChina GPPS Grade Comparison: 500NT vs. 300NT vs. 150NT
Selecting the correct Kunlun GPPS grade depends entirely on your processing equipment and end-use mechanical requirements. GPPS 500NT serves as the high-flow option in the series. The 4.0–6.0 g/10min melt flow rate makes the 500NT grade ideal for complex injection molding and thin-wall applications like LED light guide plates where rapid mold filling is critical.
GPPS 300NT offers a medium-flow profile. Manufacturers typically choose the 300NT grade when balancing flow characteristics with slightly higher heat resistance for standard injection molded household goods and packaging.
GPPS 150NT functions as the low-flow, high-heat extrusion grade. Production engineers specify 150NT for heavy-gauge sheet extrusion and XPS foam board production where melt strength takes priority over mold-filling speed. BASTONE Petrochem supplies all three grades and helps buyers match the specific MFR and Vicat softening point to their production lines.
Technical Specifications
General Information
| Property | Detail |
|---|---|
| Product Name | General Purpose Polystyrene (GPPS) |
| Grade | GPPS-500NT |
| Manufacturer | PetroChina Dushanzi Petrochemical Company |
| Brand | Kunlun |
| Production Process | Bulk polymerization (PDS Canada technology) |
| Appearance | Transparent cylindrical or flat round granules (2-5mm) |
| HS Code | 3903199000 |
Technical Parameters
| Item | Unit | Technical Indicator |
|---|---|---|
| Coloring | pcs/kg | 0 |
| Melt Mass-Flow Rate (MFR) (5.00kg) | g/10min | 4.0～6.0 |
| Tensile Strength | MPa | ≥44.0 |
| Vicat Softening Point | ℃ | 95～104 |
| Charpy Impact Strength | kJ/m2 | ≤3.0 |
| Yellow Index | - | -8～-3.8 |
| Residual Styrene Monomer | 10-6 (wt) | 250 |
Recommended Processing Conditions
| Parameter | Recommended Range |
|---|---|
| Melt Temperature | 170 - 220 ℃ |
*Note: Operators should adjust specific processing conditions based on application requirements and machinery specifications.*
Downstream Applications
LED Light Guide Plates
Lighting manufacturers require absolute optical clarity to ensure even light distribution across display panels. GPPS 500NT delivers a strict yellow index of -8 to -3.8 and zero colored granules per kilogram. The high melt flow rate allows the resin to fill intricate micro-structures in light guide molds before cooling, preventing surface defects that would otherwise scatter light incorrectly.
XPS Insulation Boards
Construction material producers extrude GPPS into extruded polystyrene (XPS) foam boards for thermal insulation. The 44.0 MPa tensile strength of the 500NT grade provides the necessary structural rigidity for building panels. The consistent Vicat softening point (95–104 ℃) ensures the polymer matrix maintains its cellular structure during the foaming process, resulting in predictable R-values for the finished insulation.
GPPS Decorative Panels (GPPS Decor)
Interior design suppliers manufacture GPPS decor panels as lightweight, shatter-resistant alternatives to glass. The transparent cylindrical granules melt uniformly at 170–220 ℃, allowing extruders to produce crystal-clear or easily tinted sheets. The low residual styrene monomer content (250 ppm) minimizes odors, making the finished decorative boards suitable for indoor residential and commercial environments.
Why Source GPPS 500NT Through BASTONE Petrochem
Procuring polymers from China requires more than just finding a price quote. BASTONE Petrochem operates as an authorized, listed distributor for China's top 3 petrochemical producers, including SINOPEC and PetroChina. We secure Kunlun GPPS 500NT directly from the Dushanzi Petrochemical plant. Buyers receive authentic material backed by factory-issued Certificates of Analysis, eliminating the quality risks associated with spot-market trading houses.
Our parent company manufactures specialty chemicals across four production sites, giving us a deep technical understanding of polymer behavior. When procurement managers face processing issues, our R&D center provides actual engineering support. We help factories adjust melt temperatures or transition smoothly between 500NT, 300NT, and 150NT grades based on their specific extrusion or injection molding constraints.
International logistics demand precision. Through our export entity, Zhejiang Bastone Technology Co., Ltd, we manage the entire supply chain from the PetroChina gates to your destination port. We handle all export documentation, customs clearance, and container loading protocols. Buyers benefit from flexible trade terms and a reliable supply schedule that keeps downstream production lines running without interruption.
Sourcing & Logistics
| Category | Detail |
|---|---|
| Supply Origin | PetroChina Dushanzi Petrochemical Company |
| Export Entity | Zhejiang Bastone Technology Co., Ltd |
| Packaging | 25kg standard woven bags (Palletized upon request) |
| Documentation | COA, Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin |
| Trade Terms | FOB, CIF, CFR, DAP |
| Sample Availability | 1-5kg samples available for R&D testing |
| Technical Documents | Official TDS and MSDS available for download upon inquiry |
