Jiangsu Saibaolong GP-525 GPPS

Product Overview

GP-525 is a general-purpose polystyrene (GPPS) grade industrially manufactured by Jiangsu Saibaolong, belonging to the styrenic transparent resin category. Supplied in pellet form, this material features high transparency and good surface gloss, making it one of the commonly used raw materials for processing transparent plastic products.

In the general-purpose GPPS grade portfolio, GP-525 is positioned for transparent injection molding and extrusion applications. Its melt flow rate (MFR) range (5–10 g/10 min, ASTM D1238) covers a medium-fluidity general processing window, balancing mold-filling capability in injection molding with product rigidity performance. Backed by high tensile strength (40 MPa) and a Vicat softening point (≥92 °C), this grade is widely applied in industries requiring high transparency, such as home appliances, consumer goods, packaging, and lighting.

For buyers, the performance of GP-525 is comparable to mainstream general-purpose polystyrene grades, commonly utilized for cost-sensitive production runs requiring stable transparent appearances.

Technical Data Sheet (TDS)

Physical Properties

Mechanical Properties

Thermal Properties

Optical Properties

Other Properties

Disclaimer: The technical data sheet (TDS) of GP-525 material from Jiangsu Saibaolong corporation, if there are differences, please refer to the official website of Jiangsu Saibaolong.

Features & Benefits

• Excellent Transparency & Clean Appearance: Yellowness index controlled between 0–0.5 (ASTM E313), preventing yellowing and making it suitable for transparent components requiring high whiteness and light transmittance.

• Good Cleanliness Control: Color specks and impurities are both ≤2 pcs/kg (GB 12671), meeting strict cleanliness requirements for appearance-sensitive applications such as cosmetic packaging and food containers.

• Moderate Processing Flowability: Melt flow rate of 5–10 g/10 min (ASTM D1238) provides a wide injection and extrusion processing window, enabling stable molding for both thin-walled and regular-walled products.

• High Rigidity & Strength: Tensile strength reaches 40 MPa (ASTM D638), offering excellent product rigidity and dimensional stability, ideal for structural parts and housings.

• Adequate Heat Resistance: Vicat softening point of ≥92 °C (ASTM D1525) meets routine thermal endurance needs for most daily commodities and home appliance components.

• Cost Competitiveness: As a general-purpose GPPS, it offers advantages in procurement cost and supply stability, well-suited for high-volume, steady production.

Applications

Backed by its comprehensive characteristics of transparency, cleanliness, and balanced rigidity, GP-525 is commonly found in the following processing sectors:

• Home Appliance Components: Transparent control panels, indicator light covers, refrigerator liner accessories, and exterior transparent parts for air conditioners and washing machines.

• Consumer Goods: Food containers, beverage cups, tableware, storage boxes, hangers, and other daily items requiring high transparency and appearance quality.

• Packaging Industry: Cosmetic bottles, transparent boxes, display trays, and other injection-molded packaging products that benefit from low yellowness index and high cleanliness.

• Lighting & Electronics: LED lamp covers, diffuser panel accessories, instrument housings, and transparent window components, taking advantage of good light transmittance and dimensional stability.

• Stationery & Toys: Injection-molded articles such as transparent pencil boxes, pen barrels, and toy housings with stable processing performance suitable for mass production.

Frequently Asked Questions (FAQs)

Q1: Does GP-525 require pre-drying prior to processing? What are the recommended drying conditions?

A: GPPS has low water absorption, but when stored in high-humidity environments or when strict surface requirements (such as avoiding silver streaks or water marks) are needed, pre-drying at 70–80 °C for 1–2 hours is recommended before processing. Meanwhile, hopper temperatures should be properly controlled to avoid resin yellowing caused by prolonged high-temperature residency.

Q2: How should one choose between GP-525 and HIPS (High Impact Polystyrene)?

A: Both belong to the styrenic resin family: GP-525 features high transparency and good rigidity, but has limited impact strength (Izod impact ≥19 J/m); HIPS significantly improves impact resistance through the incorporation of a rubber phase, though the material is opaque. Choose GP-525 if a transparent appearance is required; choose HIPS if the product needs to withstand drop and collision loads where transparency is not required.

Q3: Does GP-525 comply with RoHS and other regulatory requirements?

A: Bulk polystyrene resin generally does not contain restricted substances limited by RoHS such as lead, mercury, cadmium, hexavalent chromium, PBBs, or PBDEs, and typically satisfies RoHS directive requirements. If the target market involves food contact or medical device sectors, additional verification against FDA or EU 10/2011 regulations is required; suppliers should be requested to provide corresponding compliance documents prior to ordering.

Q4: Can your company provide samples and quotations for GP-525?

A: Yes. We support providing small-batch samples for testing and trial molding, along with quotations under FOB/CIF trade terms. Please contact us for the latest pricing, packaging specifications (typically 25 kg/bag), and shipping details.