PC-SABIC Lexan 940A
Securing reliable structural flammability safety and premium dielectric isolation in complex electronic housings without compromising mechanical drop-toughness requires an elite material, which SABIC’s LEXAN™ 940A delivers through its unreinforced, medium-viscosity flame-retardant polycarbonate matrix. Featuring a density of 1.21 g/cm³ and a glass transition temperature (Tg) of 150°C, this amorphous grade achieves an outstanding UL 94 V-0 flammability rating down to 1.0mm and a 5VA rating at 3.0mm. Jucheng Precision, operating under strict IATF 16949 and ISO 9001 frameworks, specializes in precision injection molding of Lexan 940A. Backed by 35+ advanced presses and in-house five-axis CNC-machined tooling, we control its low isotropic shrinkage (0.5%-0.7%), delivering flawless electrical enclosures verified by Zeiss CMM.
SABIC Lexan 940A Flammability & Toughness Profile
LEXAN™ Resin 940A is an unreinforced, standard-flow amorphous Polycarbonate (PC) resin, certified to deliver outstanding strength, impact stiffness, and continuous thermal resistance under ISO/ASTM standards:
| Norme d'inflammabilité et de performance | SABIC Lexan 940A Metric Value | Avantage en matière de moulage et de sécurité électrique |
|---|---|---|
| UL 94 V-0 Flame Rating | V-0 Rated at 1.0 mm Wall Thickness | Provides exceptional self-extinguishing safety in thin-walled housings, preventing dynamic heat buildup and flame propagation. |
| UL 94 5VA Flame Rating | 5VA Rated at 3.0 mm Wall Thickness | Résiste aux flammes de barre ouvertes intenses sans perforation structurelle. Essentiel pour les boîtes de distribution haute tension. |
| Résistance aux chocs | ASTM Notched Izod Impact 640 J/m | Unreinforced amorphous matrix provides exceptional mechanical drop-test and impact resilience compared to standard rigid PC. |
Structural Component Process Configurations for Flame-Retardant Lexan 940A
With its high-flow melt performance and low mold shrinkage, Lexan 940A processes consistently inside complex mold geometries:
| Catégorie de processus de moulage | Compatibilité des processus et détails opérationnels |
|---|---|
| Moulage de composants électroniques à parois minces | Excellent. Highly optimized for high-transparency microelectronic housings, smart-meter accessories, and intricate connector frames. |
| Heavy-Duty Electrical Brackets | Excellent. High tensile modulus and exceptional flame retardancy prevent structural distortion or deformation in smart grids. |
| Power Supply Housings | Excellent. Outstanding dimensional stability, low outgassing, and excellent high-temperature creep resistance prevent structural distortion. |
Amorphous Self-Extinguishing Molding Matrix
Molding an amorphous high-performance resin like Lexan 940A requires strict thermal boundaries and low-stress mold setups to prevent stress-cracking:
Contrôle du retrait isotrope amorphe
Being an amorphous copolymer, Lexan 940A exhibits low and highly uniform shrinkage (0.50% to 0.70%). We use our 5-axis CNC machines to cut precise mold cavities and balance cooling paths, ensuring zero warping and zero dimension defects on Zeiss CMM verification.
Profilage de température de fusion élevée
Melting requires specialized machines with ceramic heater bands. Processing barrel temperatures are strictly managed between 280°C and 310°C (536°F to 590°F) to ensure homogeneous flow. Exceeding 320°C can result in chemical chain fracturing and polymer degradation.
Contrôle de température de moule à huile sous pression
Nous maintenons les températures de moule à 80°C–120°C (176°F à 248°F) à l'aide de chauffages à eau sous pression. Des températures de moule élevées maximisent la brillance de surface, réduisent les lignes de soudure et empêchent les fibres de carbone en surface de flotter, assurant une finition lisse et non fibreuse.
Desiccant Drying & Volatiles Exhaust (Hydrolysis Prevention)
PC is highly sensitive to moisture at high melt temperatures. Wet molding results in rapid hydrolytic chain cleavage, causing severe splay, gas bubbles, and a major drop in impact strength. We desiccant dry Lexan 940A resin at 120°C (248°F) for 3–4 hours, keeping moisture below 0.02%.
Key Application Fields for PC-SABIC Lexan 940A
- Réseaux intelligents et infrastructure électrique : Disjoncteurs haute tension, compteurs électriques intelligents, borniers, boîtiers de relais électriques, cadres d'interrupteurs muraux et bobines.
- EV Charging & Automotive Systems (IATF 16949): Boîtiers de pistolets de charge pour véhicules électriques, couvercles de boîtes de jonction haute tension, boîtiers de fusibles intérieurs et boîtiers de capteurs de véhicule.
- Consumer Electronics & Telecommunications: Wi-Fi router enclosures, charger adapter bodies, power tool housings, and set-top boxes.
Propriétés
| Densité | 1.21 - 1.22 g/cm³ |
| Indice de fluidité à chaud (MVR) (300°C/1,2 kg) | 9.5 cm³/10min |
| Melt Mass-Flow Rate (MFR) (300°C/1.2kgf) | 10 g/10 min |
| Résistance à la traction au seuil d'écoulement | 62 MPa |
| Résistance à la traction à la rupture | 55 MPa |
| Allongement à la rupture en traction (DAM) | 90 % |
| Résistance à la flexion | 91 MPa |
| Module de flexion | 2,240 MPa |
| Izod Notched Impact Strength (1/8, 23°C) | 640 J/m |
| Dureté Rockwell (échelle R) | 118 - |
| Point de ramollissement Vicat | 151 °C |
| Température de déflexion sous charge (HDT @ 1,82 MPa) | 132 °C |
| Retrait au moulage linéaire | 0.50 - 0.70 % |
| Flammability Rating (1.00mm) | Classe UL 94 V-0 |
| Flammability Rating (3.00mm) | Classe UL 94 5VA |
| Taille maximale de pièce | 1000 x 800 mm |
| Taille minimale de pièce | 1 x 1 mm |