Hydrolysis-Immune Polycarbonate Optical Material for Tropical Climate LED Applications
Light Diffusion PC product models in the LED lighting field
| Properties | Test Method | Test Condition | Unit | Typical Values |
| Physical properties |
| Specific Gravity | ISO 1183 | 23ºC | g/cm3 | 1.2 |
| MI | ISO 1183 | | g/10min | 10 |
| Ash | ISO 3451 | 800ºC,30min | % | 0 |
| Mechanical properties |
| Tensile Strength | ISO 527 | 50mm/min | MPa | 62 |
| (yield) elongation | ISO 527 | 50mm/min | % | 90 |
| Flexural Modulus | ISO 178 | 2mm/min | MPa | 2280 |
(3.18 mm)
Cantilever beam notched impact strength | ASTM D256 | 23ºC | J/m | 800 |
(3.18 mm)
Non-notched impact strength of cantilever beam | ASTM D256 | 23ºC | J/m | - |
| Thermal properties |
| Heat deflection temperature | ISO 75 | 1.80MPa | °C | 129 |
| Melting Point | DSC | - | C | |
| Other properties |
| Flammability | UL94 | 3.2 | | V2 |
Production Description:
PC - the transparent engineering polymer - features interconnected carbonate groups enabling unique ductility. With melt flow indices (MFI) ranging 5-25 g/10min (300°C/1.2kg), bisphenol-A-based variants (MW 30k-100k) dominate markets for safety glazing and electronic housings requiring 140°C continuous service temperatures.
Key Advantages Over Standard PC:
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Tailored Performance: Balances transparency, strength, and processability for niche uses.
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Cost Reduction: Blends like PC/ABS lower material costs while maintaining core properties.
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Durability: Enhanced UV, chemical, and thermal stability for harsh environments.
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Regulatory Compliance: Meets flame safety (UL94), food contact (FDA), and medical standards.
A: Bulb Lamp Cover Series (Light Transmittance 90% - 98%, Beam Angle 150° - 230°)
B: T-Bulb Lamp Cover Series (Light Transmittance 86% - 96%, Beam Angle 150° - 200°)
C. BR Lamp/PAR Lamp/Spotlight Cover Series (Light Transmittance 88% - 94%)
D. Taper/Candle Bulb Cover Series (Light Transmittance 85% - 95%)
E. Ceiling Lights and Various Lamps Series (Light Transmittance 80% - 92%)
F. Tube Light Series (T8 Tubes, Dual-Color Tubes) (Light Transmittance 80% - 96%)
Company Profile
HMT International is a leading global manufacturer and exporter specializing in modified plastics, operating under the brand Chongyuan. Established with a commitment to innovation and sustainability, we engineer high-performance thermoplastic compounds tailored to meet the evolving demands of industries worldwide.
Certified to ISO 9001, ISO 14001, and compliant with RoHS/REACH standards, we align our operations with global sustainability goals while delivering exceptional technical support and supply chain reliability.
3,000+ customized formulations.
500,000+ MT annual production capacity.
25+ years of polymer expertise.
ISO 9001 & ISO 14001 certified facilities.
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