Zhejiang Yisu GON525 is a high-clarity, high-flow GPPS resin for injection molding. Featuring 89.7% light transmittance, excellent moldability, and high rigidity, this material powers thin-wall packaging, stationery, and clear housings. Request TDS, MSDS, and COA.
| Manufacturer | Zhejiang Yisu |
|---|---|
| MVR | 6-10 cm³/10min |
| Tensile Strength at Yield | ≥45 MPa |
| Izod Notched Impact | 1.6 kJ/m² |
| Styrene Monomer Content | ≤700 ppm |
Note: See the product description for additional technical specifications
Zhejiang Yisu GON525 is a general-purpose polystyrene (GPPS) injection molding resin produced by Zhejiang Yisu New Material Co., Ltd. (Zhejiang Yisu). Supplied in colorless transparent cylindrical pellets, this material is a general-purpose plastic grade featuring high flowability, high optical clarity, and high rigidity.
As one of Zhejiang Yisu’s flagship GPPS grades in East China and export markets, GON525 enjoys a strong market reputation in high-transparency injection molding applications. Its core advantage lies in an optimal balance between superior optical purity and exceptional melt flow behavior (MVR reaching 6–10 cm³/10min), which significantly shortens molding cycles and lowers energy consumption. Engineered specifically for injection molding processes, GON525 is widely used in thin-wall transparent packaging, daily stationery, display props, electronic housings, and household plastic products—making it an ideal raw material choice for plastic processors seeking cost-effective, high-clarity aesthetics.
| Property | Test Condition | Value | Unit | Test Method |
| Melt Volume Rate (MVR) | 200°C/5kg | 6-10 | cm³/10min | GB/T 3682.1-2018 |
| Styrene Monomer Content | — | ≤700 | ppm | GB/T 16867-1997 |
| Property | Test Condition | Value | Unit | Test Method |
| Tensile Strength at Yield | — | ≥45 | MPa | GB/T 1040.2-2006 |
| Charpy Notched Impact Strength | — | 1.6 | kJ/m² | GB/T 1043.1 |
| Property | Test Condition | Value | Unit | Test Method |
| Vicat Softening Temperature | — | 90-94 | °C | GB/T 1633-2000 |
| Heat Deflection Temperature | 0.45MPa | 83.3 | °C | GB/T 1634.2 |
| Property | Test Condition | Value | Unit | Test Method |
| Light Transmittance | — | 89.7 | % | GB/T 2410 |
| Yellowness Index | — | 0.5 | — | ASTM E313 |
| Property | Test Condition | Value | Unit | Test Method |
| Injection Temperature | — | 180-240 | °C | — |
| Mold Temperature | — | 40-70 | °C | — |
The technical data sheet (TDS) of Zhejiang Yisu GON525 GPPS material from Zhejiang Yisu corporation, if there are differences, please refer to the official website of Zhejiang Yisu.
Superior Optical Purity & Low Yellowness: Boasts a high light transmittance of 89.7% and an ultra-low yellowness index of 0.5, imparting crystal-like transparency and high surface gloss to final parts while enhancing visual appeal.
High Flowability & Excellent Mold Filling: Delivers a melt volume-flow rate (MVR) of 6–10 cm³/10min, providing favorable flow properties suited for complex or thin-walled injection molding, effectively reducing filling pressures and cycle times.
High Rigidity & Dimensional Stability: Features a tensile yield strength of ≥ 45 MPa, maintaining high structural rigidity and resistance to deformation under load or during daily handling.
Low Residual Monomer & Compliance Safety: Maintains residual styrene monomer content strictly below 700 ppm, resulting in low odor, reduced thermal degradation risks, and alignment with stringent quality and environmental standards.
Broad Processing Window & Easy Molding: Offers a wide injection processing window (180–240 °C) with easy demolding, significantly minimizing defects such as flash, voiding, and internal stress, thereby ensuring high yield rates.
Thin-Wall Transparent Packaging: Disposable clear food containers, cold beverage lids, reagent boxes, candy boxes, dust covers, and transparent blister pack inserts.
Daily Goods & Stationery: Clear storage containers, desktop organizers, cosmetic organizers, stamp housings, binder clips, and pen barrels.
Household Appliances & Electronics: Small appliance transparent housings, LED indicator shades, instrument panels, and clear battery case components.
Toys & Display Props: Transparent building blocks, plastic model kit parts, retail display stands, showcase boxes, and holiday ornaments.
Q1: Does GON525 require pre-drying before injection molding?
A1: GPPS exhibits extremely low moisture absorption (typically below 0.1%). If stored in intact packaging under dry ambient conditions (relative humidity < 60%), GON525 can generally be processed directly without drying. However, during rainy seasons or following prolonged exposure to high humidity, hot-air drying at 70–80 °C for 1–2 hours is recommended to remove surface moisture and prevent silver streaks or bubbles in molded parts.
Q2: How does GON525 compare with PMMA (Acrylic) or PC (Polycarbonate) for clear part applications?
A2: GON525 (GPPS) offers clear cost advantages, superior processing flowability, ease of molding, and high rigidity, making it ideal for cost-sensitive clear parts with moderate impact requirements. PMMA provides higher optical clarity and superior weatherability but is more expensive and brittle; PC features outstanding impact strength and heat resistance, though at a higher cost and with lower flowability. For applications prioritizing cost-efficiency and production throughput with moderate impact needs, GON525 serves as a superior commercial choice.
Q3: Does Zhejiang Yisu GON525 comply with international environmental and regulatory standards?
A3: Hazardous substances are strictly controlled during manufacturing, ensuring compliance with major global environmental regulations such as RoHS directives and REACH regulations. Plastics converters targeting overseas markets can request complete TDS, MSDS/SDS, and Certificates of Analysis (COA) from their supplier to satisfy client audit requirements.
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