PS-Chi Mei POLYREX PG-33
Le PS-Chi Mei POLYREX PG-33 est une nuance de polystyrène à usage général (GPPS) fabriquée par Chi Mei Corporation, réputée pour sa luminosité optique élevée, son indice de fluidité standard (MFI 8,0 g/10 min) et sa densité légère de 1,04 g/cm³. Spécialement formulée pour le moulage par injection standard, cette nuance est la référence mondiale pour les abat-jour à haut indice de réfraction, les contenants alimentaires transparents et les boîtiers de CD. Chez Jucheng Precision, un façonnier certifié ISO 9001 et IATF 16949, nous utilisons nos plus de 25 machines CNC 5 axes internes pour usiner des moules en acier inoxydable S136 polis miroir. Cela prévient les défauts de lignes de soudure et élimine les contraintes résiduelles de moulage, offrant des composants optiques impeccables et sans contrainte, vérifiés par inspection CMM Zeiss.
POLYREX PG-33 Optical Brightness & Toughness Profile
POLYREX® PG-33 is a standard general-purpose polystyrene (GPPS) resin engineered by Chi Mei Corporation, valued for its high refractive index, low density, and high-gloss aesthetics:
| Propriété physique et optique | POLYREX PG-33 Spec Values | Avantage technique pour les pièces moulées |
|---|---|---|
| Optical Refraction | High Refractive High-Brightness Index | Maximizes light transmission and dispersion, preventing internal light loss in complex lampshades and clear display frames. |
| Melt Stability | MFR 8,0 g/10 min (200°C x 5 kg) | Provides a stable, predictable flow during continuous production cycles, minimizing gate blush and surface swirl defects. |
| Hardness Stiffness | Ball Indentation Hardness 149 MPa | Ensures a highly rigid structural frame, preventing flexing or dimensional bending in large clear organizer boxes. |
Structural Application & Molding Process Suitability for PG-33
With stable molecular polymerization, Chi Mei POLYREX PG-33 flows uniformly to yield pristine aesthetic finishes:
| Technologie de moulage | Adéquation du processus et détails opérationnels |
|---|---|
| Lampshades & Diffusers | Excellent. Highly suitable for molding geometrically complex transparent lampshades, light guides, and diffusing cover lenses. |
| Transparent Food Containers | Excellent. Fully optimized for high-volume transparent refrigerator crisper drawers, storage canisters, and transparent plastic cups. |
| Cosmetic & Media Enclosures | Excellent. Ideal for crystal-clear cosmetic jar display bases, cassette tape cases, and luxury retail organizers. |
PS-Chi Mei POLYREX PG-33 Tooling & Optical Refraction Guide
Molding an amorphous standard GPPS like POLYREX PG-33 requires careful gating and slow ejection to prevent stress-induced cloudiness and brittle cracking:
- Weld Line & Haze Management: GPPS is highly amorphous, meaning it has low mold shrinkage (0.3% to 0.6%). However, knit lines (weld lines) will block light transmission and degrade optical cosmetics. Jucheng’s tooling division conducts Moldflow analysis to place gates strategically, eliminating visible weld lines in functional view areas.
- Tool Steel Selection & Polishing: To fully leverage PG-33’s high-brightness properties, we use premium S136 stainless steel mold inserts, mirror-polished with high-grade diamond paste. This ensures that the molded components emerge with flawless, glass-like clarity.
- Molding Process Parameters: Process temperatures are managed at 180°C–240°C (356°F–464°F). Mold temperatures are kept at 30°C to 50°C (86°F–122°F). Slower injection speeds and low packing pressures are implemented to prevent residual molding stresses, which would cause birefringence or rainbow effects.
- Precise & Gentle Ejection: Because GPPS is highly rigid and brittle (tensile elongation 2%), sharp ejector pins can crack parts during release. We machine draft angles of at least 1.5° to 2° and utilize wide stripper plates or air-assisted ejection to distribute demolding force evenly.
Key Application Fields for PS-Chi Mei POLYREX PG-33
- Aesthetic Lighting & Optical: High-end geometric ceiling lampshades, transparent LED diffuser covers, and light-guide panels.
- Transparent Food Packing: Refrigerator crisper drawers, stackable plastic food boxes, spice jars, and transparent water tumblers.
- Biens de consommation et emballage : Clear cassette tape cases, thick-walled cosmetic jar outer display covers, and luxury stationery organizers.
Propriétés
| Densité | 1.04 - 1.05 g/cm³ |
| Indice de fluidité à chaud (MFR) (200°C/5,0 kg) | 8,0 g/10 min |
| Résistance à la traction au seuil d'écoulement | 41.0 MPa |
| Résistance à la traction à la rupture | 37.0 MPa |
| Allongement à la rupture en traction | 2.0 - 5.0 % |
| Résistance à la flexion | 62.0 MPa |
| Module de flexion | 2 400 MPa |
| Résistance au choc Izod (entaillé, 23°C) | 2.0 kJ/m² |
| Ball Indentation Hardness | 149 MPa |
| Vicat Softening Point (5.0kg, 50°C/hr) | 89,0 °C |
| Deflection Temperature Under Load (1.8 MPa) | 76.0 °C |
| Indice d'inflammabilité (1,6 mm) | UL 94 HB - |
| Taille maximale de pièce | 800 x 600 mm |
| Taille minimale de pièce | 1 x 1 mm |