Light Diffusion Polycarbonate Pellets For Marine & Humid Zone Lighting
Corrosion-Resistant Light Diffusion Polycarbonate for Marine & Humid Zone Lighting
Light Diffusion PC product models in the LED lighting field
| Physical properties | Silver value unit system | Test Method | |||
| density | 1.20 g/cm³ | ISO 1183 | |||
| Melt volume flow rate ( MVR ) (300ºC/1.2 kg ) | 11.0 am³/10min | ISO 1133 | |||
| Shrinkage Transverse flow: 4.00 mm Flow rate: 4.00 mm | 0.50 to 0.70 % 0.50 to 0.70 % | Internal methods | |||
| Water absorption rate (23C.24 hr ) | 0.20 % | ISO 62 | |||
| Mechanical properties | Rating unit system | Test Method | |||
| Tensile modulus | 2400 MPa | ISO 527-2/1 | |||
| Tensile stress (yield) | 62.0 MPa | ISO 527-2/50 | |||
| Tensile strain (yield) | 6.0 % | ISO 527-2/50 | |||
| Nominal tensile strain at break | >50 % | ISO 527-2/50 | |||
| Flexural modulus 2 | 2350 MPa | ISO 178 | |||
| Bending stress 2 | 92.0 MPa | ISO 178 | |||
| Impact performance | The fixed value unit system | Test Method | |||
| Simple supported beam notched impact strength | 71 kJ/m² | ISO 179 | |||
| Simply supported beam unnotched impact strength | No break | ISO 179 | |||
| Thermal properties | Silver value unit system | Test Method | |||
| Heat deformation temperature (0.45 MPa , unannealed) | 141 ºC | ISO 75-2/B | |||
| Heat deformation temperature (1.8 MPa , unannealed) | 128 ºC | ISO 75-2/A | |||
| Vicat softening temperature | 148 ºC | ISO 306/B50 | |||
| Coefficient of Linear Thermal Expansion - Flow | 7.0E-5 am/cm/ºC | ISO 11359-2 | |||
| Coefficient of linear thermal expansion - transverse | 7.0E-5 am/cm/ºC | ISO 11359-2 | |||
Production Description:
As a carbonate-containing polymer family, PC's molecular architecture enables unique combinations of toughness and transparency. While multiple structural variants exist (alicyclic, aromatic-aliphatic hybrids), commercial grades predominantly utilize bisphenol A monomers, yielding materials with tensile strengths ~70 MPa and notched Izod impact resistance exceeding 800 J/m.
Key Advantages Over Standard PC:
Tailored Performance: Balances transparency, strength, and processability for niche uses.
Cost Reduction: Blends like PC/ABS lower material costs while maintaining core properties.
Durability: Enhanced UV, chemical, and thermal stability for harsh environments.
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.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.