Polystyrene (PS)

1. Product Overview

Polystyrene (PS) is a versatile, amorphous thermoplastic polymer widely used in rigid packaging, consumer goods, and industrial components. Its primary value lies in delivering exceptional clarity, ease of processing, and cost efficiency for high-volume production. Strategically critical as a substitute for more expensive engineering plastics, PS enables manufacturers to lower unit costs without sacrificing structural performance in non-load-bearing applications.

2. Key Specifications & Technical Characteristics

• Chemical composition: Solid polystyrene homopolymer (C₈H₈)ₙ

• Purity / grade: >99.8% virgin resin; available in GPPS (general purpose) and HIPS (high impact)

• Physical characteristics:

  • Form: Translucent, spherical or cylindrical pellets

  • Color: Natural (water-clear) or custom colorable

  • Melt flow index (MFI): 7–15 g/10 min (ASTM D1238)

  • Density: 1.04–1.06 g/cm³

• Packaging options: 25 kg multi-ply paper bags, 750 kg super sacks, or 20 MT bulk truck/trailer

• Shelf life: 24 months in dry, ventilated storage below 40°C, away from UV exposure

3. Core Industrial Applications

• Packaging industry: Disposable cups, food containers, lids, and trays – outperforms paper or PLA in moisture barrier and rigidity at lower cost.

• Consumer electronics: TV housings, remote controls, and internal mounting components – offers superior dimensional stability for snap-fit assemblies compared to recycled ABS.

• Medical & laboratory: Petri dishes, test tubes, diagnostic cassettes – clarity and gamma sterilization compatibility exceed PVC.

• Construction & insulation: Foam PS (XPS/EPS) core boards – delivers higher compressive strength per unit weight than polyurethane alternatives.

Performance advantage: Faster cycle times (15–20% shorter than polypropylene) and lower energy input during molding directly reduce per-part OPEX.

4. Competitive Advantages

• Quality consistency: Lot-to-lot MFI variance < ±3%; full traceability from cracker to pellet.

• Supply reliability: Dedicated buffer stock in three regional hubs (Asia, EU, NA) – 98.5% on-time dispatch rate over 24 months.

• Logistics capability: Containerized with desiccant lining and real-time tracking; expedited LTL available for trial orders.

• Price competitiveness: Index-linked pricing with volume-based quarterly rebates – lower than EU spot market average by 6–8%.

• Sustainability: Mass-balance ISCC PLUS certified recycled content available (30% PCR PS).

• Technical support: Free mold-flow simulation reports and on-site processing audits for contracts >50 MT/month.

5. Commercial & Supply Information

• MOQ (Minimum Order Quantity): 20 MT (BULK) per product grade

• Loading capacity: 24–26 MT per 20-ft dry container (palletized) | 26–28 MT per 40-ft HC container