Dushanzi GPPS-500NT | High Rigidity & High Transparency for Transparent Plastic Applications
Product Overview
Dushanzi GPPS-500NT is a standout product in the general purpose polystyrene (GPPS) market. Originating from Dushanzi, a well-known production base, it is engineered to meet the demanding requirements of various industries. GPPS is an amorphous transparent thermoplastic polymer with high surface gloss and rigid property. The 500NT grade is specifically formulated to provide excellent transparency and rigid mechanical properties, making it a top choice for applications such as transparent packaging, stationery and lamp covers. Its wide range of uses spans across multiple sectors, including food packaging, daily consumer goods, lighting and electronic parts, due to its crystal clear appearance and stable long-term processing performance.
Basic Product Specifications
- Material: General Purpose Polystyrene (GPPS)
- Grade: Transparent Injection & Extrusion Grade
- Processing Temperature: 190 - 230 °C
- Density: 1.04 - 1.06 g/cm³
- Light Transmittance: 89% - 92%
- Vicat Softening Point: 98 - 104 °C
- MFR (200℃/5kg): 7.0 - 9.0 g/10min
- Molding Fluidity: Balanced melt flow, suitable for thin-wall molding
Core Product Advantages
High Rigidity
The Dushanzi GPPS-500NT boasts high rigidity, enabling it to resist slight external forces effectively. Whether it’s the assembly extrusion force inside transparent products or light impact from the surrounding environment, this product can maintain its structural integrity. For example, in transparent stationery and food containers, it can keep stable shape without deformation, ensuring neat appearance of finished goods. The high-rigidity property also allows for the use of thin-walled transparent parts while still meeting the required stiffness standards, which can reduce material costs and molding cycle time.
Excellent Chemical Resistance to Daily Chemicals
This GPPS grade is highly resistant to corrosion from a wide range of daily mild chemicals. In food packaging containers, it can safely hold weak acids, weak alkalis, beverages and salt solutions without being fogged or corroded. This not only extends the service life of transparent plastic products but also avoids product surface whitening and contamination. Unlike opaque plastic materials that cannot display internal contents clearly, Dushanzi GPPS-500NT offers long-term transparent appearance reliability in daily use environments, eliminating the need for surface secondary polishing treatment.
Good Moldability
Dushanzi GPPS-500NT has good moldability, which allows it to adapt well to various molding conditions including injection and sheet extrusion. It can flow evenly inside mold cavities without flow marks or silver lines after proper drying, making it suitable for complex transparent product layouts. For instance, in consumer goods production with thin-wall and irregular shapes, the good fluidity nature of the product simplifies the molding process. Moreover, it can effectively lower residual stress of molded parts, reducing cracking probability and ensuring the long-term dimensional stability of transparent products.
High Light Transmittance & Gloss Surface
The product has high light transmittance and mirror surface gloss, which means that finished parts present crystal clear vision without haze. In food packaging and cosmetic shell products, this feature fully displays internal items and printed patterns, improving product display attractiveness. Additionally, the smooth inner and outer surface of parts made from Dushanzi GPPS-500NT prevents impurity adhesion, maintaining clean transparent appearance and reducing post-production cleaning procedures.
Main Application Fields
- Food Packaging: Ideal for disposable cups, transparent food boxes and packaging lids.
- Daily Stationery: Used in transparent rulers, pen shells and storage boxes.
- Lighting Components: Suitable for indoor lamp shades and decorative light covers.
- Electronic Accessories: Can be used in transparent small appliance casings.
- Extruded Sheets: Applied in transparent GPPS sheets for vacuum forming packaging.
Processing & Storage Guidelines
Processing: When processing Dushanzi GPPS-500NT into finished products, common methods such as injection molding and sheet extrusion are recommended. The processing temperature should be controlled within the melting temperature range of 190 - 230 °C. Dry raw material at 70-80℃ for 2-4 hours before processing to prevent silver lines and bubbles in the final product; avoid temperature exceeding 240℃ to prevent yellowing.
Storage: Store the product in a dry, well-ventilated area away from direct sunlight and heat sources. Keep it away from sharp objects to avoid damage to the packaging. The storage temperature should be between 0 - 40 °C, and the relative humidity should be below 80%. Seal unused pellets tightly to avoid moisture absorption.
Quality Assurance & Supply Service
We guarantee the quality of Dushanzi GPPS-500NT through a strict quality control system. Each batch of products undergoes multiple tests including MFR, transmittance and Vicat softening point to ensure that it meets international and industry plastic standards. We also offer a stable supply service, with sufficient inventory to meet your large-scale and long-term production needs. Our professional after-sales team is ready to provide you with technical support and processing parameter solutions at any time.
Frequently Asked Questions
Q1: What is the MFR range of Dushanzi GPPS-500NT?A: The melt flow rate is 7.0–9.0 g/10min under test condition 200℃/5kg. Our technical team can provide specific processing parameters based on your product mold requirements.
Q2: Can Dushanzi GPPS-500NT be used for food contact packaging?A: Yes, it meets the relevant food-contact safety standards and can be safely used for disposable food containers and transparent packaging.
Q3: How long is the service life of products made from Dushanzi GPPS-500NT under indoor use?A: Under normal indoor use and processing conditions, the transparent appearance can keep stable for more than 3 years without obvious yellowing.
Q4: What molding processes are compatible with Dushanzi GPPS-500NT?A: We support injection molding and transparent sheet extrusion to produce various transparent plastic products. You can contact us for specific mold matching suggestions.
Q5: Is special drying equipment required for Dushanzi GPPS-500NT pellets before molding?A: Standard hot air drying oven is sufficient, special equipment is generally not required. Our processing guide can provide detailed drying time and temperature instructions.
Product Summary
Dushanzi GPPS-500NT is a high-quality general purpose polystyrene resin that combines multiple excellent properties such as high rigidity, daily chemical resistance, good moldability, high light transmittance and high surface gloss. It is suitable for a wide range of transparent plastic applications in various industries, offering long-term stable transparency and cost-effectiveness. With strict quality control and a stable supply service, it is the ideal choice for your transparent product manufacturing projects. Whether you are producing large-scale food packaging sheets or small-scale transparent stationery parts, Dushanzi GPPS-500NT can meet your needs. If you need to learn more about the product or obtain a quote, please contact us.
