Denka GPPS MW-1-321 Polystyrene Plastic Raw Material Resin

In the field of transparent plastic applications, Denka GPPS MW-1-321 (General Purpose Polystyrene) is a high-quality resin material that combines excellent transparency with outstanding processing performance. As a premium GPPS (General Purpose Polystyrene) product, it is widely used in packaging, electronics, and consumer goods industries.

ZiJun Plastics, as a professional plastic raw material supplier, provides long-term and stable supply of Denka series resins, ensuring consistent product quality and batch stability to meet global industrial application needs.

Key Selling Points

• High transparency and excellent optical performance — ideal for products with high appearance requirements
• Good flowability — suitable for thin-wall injection molding and high-efficiency production
• Stable supply and quality assurance — supported by ZiJun Plastics’ professional sourcing channels

Technical Data Sheet (TDS)

The following are typical properties of Denka GPPS MW-1-321 (for reference only; actual values are subject to COA):

Key Applications

Denka GPPS MW-1-321 is widely used in the following industries due to its high transparency and excellent processing performance:

Packaging

• Transparent food containers
• Disposable tableware (cups, trays)
  Advantages: High gloss and excellent visual appearance

Electronics

• Display covers
• Lighting housings and light guide components
  Advantages: Good insulation and high molding precision

Automotive

• Instrument panel transparent parts
• Interior decorative components
  Advantages: Cost-effective and easy to process

Consumer Goods

• Cosmetic packaging
• Storage boxes and transparent housings
  Advantages: Premium appearance and easy coloration

Product Comparison

GPPS vs HIPS (High Impact Polystyrene)

Conclusion:
If high transparency is required (such as packaging and display parts), GPPS MW-1-321 is recommended; if impact resistance is more important (such as housings), HIPS is a better choice.

GPPS vs ABS

Conclusion:
Choose GPPS for cost-sensitive applications requiring transparency; choose ABS when higher mechanical strength is needed.

Processing Guidelines

To achieve optimal performance of Denka GPPS MW-1-321, the following processing parameters are recommended:

Injection Molding Parameters

• Drying Temperature: 70–80°C (2–3 hours)
• Barrel Temperature: 180–220°C
• Mold Temperature: 30–50°C
• Injection Pressure: 60–100 MPa

Processing Notes

• Use a dehumidifying dryer to avoid moisture affecting transparency
• Avoid excessive temperature to prevent material degradation or yellowing
• Use a highly polished mold surface to ensure product gloss

FAQ

1. Is Denka GPPS MW-1-321 suitable for food contact applications?

Generally, GPPS can be used for food packaging, but compliance with specific regulations (such as FDA) should be confirmed. It is recommended to request certification documents from the supplier.

2. Why is the transparency of my product insufficient?

Possible reasons include:

• Insufficient drying of raw materials
• Rough mold surface
• Unstable injection molding temperature

3. Can GPPS MW-1-321 be used outdoors?

It is not recommended for long-term outdoor use, as GPPS has poor weather resistance and may yellow over time.

4. Can it be used for secondary processing (such as printing or plating)?

Yes, GPPS has good surface properties and is suitable for printing and coating.

5. Why is GPPS more brittle than HIPS?

GPPS is pure polystyrene, while HIPS is rubber-modified, giving it better impact resistance.