Factory and Activities
Specifications
General Information
| Attribute | Detail |
|---|---|
| Product Name | General Purpose Polystyrene (GPPS) |
| Grade | STL 525 |
| Manufacturer | Lianyungang Petrochemical Co., Ltd. |
| CAS Number | 9003-53-6 |
| HS Code | 390311 |
| Product Standard | Q/3207 LPC 601-2023 |
| Appearance | Transparent Granules |
Technical Properties
| Inspection Item | Unit | Qualified Indicator | Testing Method |
|---|---|---|---|
| Melt Mass-Flow Rate (200°C, 5kg) | g/10min | 8 ± 2 | GB/T 3682.1-2018 |
| Vicat Softening Temperature (T 50/50) | °C | ≥ 85 | GB/T 1633-2000 |
| Residual Styrene Monomer | mg/kg | ≤ 750 | GB/T 38271-2019 |
| Yellowness Index | / | -15 ～ -1 | HG/T 3862-2006 |
| Haze | % | ≤ 1.2 | GB/T 2410-2008 |
| Luminous Transmittance | % | ≥ 85 | GB/T 2410-2008 |
| Appearance: Black Spot Granule | count/kg | ≤ 5 | SH/T 1541.1-2019 |
| Appearance: Black Spot | count/kg | ≤ 20 | Q/3207 LPC 601-2023 |
| Appearance: Color Granule | count/kg | ≤ 5 | SH/T 1541.1-2019 |
(Note: Data extracted directly from Lianyungang Petrochemical Co., Ltd. Product Quality Inspection Report. Tensile Stress at Break and Color L/a/b values are recorded on a report-only basis per batch.)
Applications
Injection molders consume STL GPPS 525 to manufacture transparent food packaging, including rigid cups and deli containers. High luminous transmittance ensures consumers can clearly see the packaged food. Low residual styrene monomer content (under 750 mg/kg) meets strict safety requirements for food-contact materials.
Fast cycle times dictate profitability in the disposable packaging sector. The 8 g/10min melt mass-flow rate of STL GPPS 525 allows the polymer to fill multi-cavity molds rapidly before freezing. Factory operators maintain lower injection pressures, reducing wear on molding equipment while achieving high output rates.
Appliance manufacturers specify the resin for internal refrigerator components and display housings. Tensile stress at break provides sufficient mechanical strength for structural parts. A consistent melt flow rate allows engineers to design complex, thin-walled molds without worrying about short shots during production runs.
Extrusion facilities process the pellets into clear sheets for CD cases and office supplies. Low haze values prevent cloudiness in the final extruded sheet. A negative yellowness index guarantees the extruded plastic maintains a crisp, crystal-clear appearance on retail shelves.
Why Source Through BASTONE
BASTONE Petrochem operates as a listed distributor for China's largest petrochemical producers, including SINOPEC and Lianyungang Petrochemical. We bypass spot-market traders to secure direct factory allocations. Procurement managers receive full COA documentation with every order, guaranteeing batch-to-batch consistency for sensitive manufacturing runs.
Our parent company manufactures specialty chemicals, giving our team deep technical insight into polymer processing. BASTONE supply chain specialists understand how variations in melt flow or Vicat softening temperatures impact your extrusion lines. We help buyers match specific resin grades to their exact machinery and end-use requirements.
Sourcing petrochemicals from China involves navigating port congestion, fluctuating factory allocations, and complex export regulations. BASTONE Petrochem acts as your direct bridge to the manufacturer. We secure volume allocations before spot market shortages occur, ensuring your production lines never wait for raw materials.
Documentation errors cause expensive customs delays. Our export platform team at Zhejiang Bastone Technology Co., Ltd prepares accurate commercial invoices, packing lists, and certificates of origin. We coordinate directly with freight forwarders at major Chinese ports to load containers safely and dispatch vessels on schedule.
Sourcing & Logistics
| Logistics Detail | Specification |
|---|---|
| Supply Origin | Lianyungang, Jiangsu, China |
| Standard Packaging | 25kg woven bags with moisture-proof inner liners |
| Container Loading | 17 MT per 20ft container (standard configuration) |
| Export Entity | Zhejiang Bastone Technology Co., Ltd |
| Trade Terms | FOB, CIF, CFR |
| Documentation Provided | Commercial Invoice, Packing List, COA, Bill of Lading, Certificate of Origin |
| Sample Availability | Available upon technical review of application requirements |
