1. specific gravity: 1.2g/cm3 2. light transmission: 88% 3. impact strength:850J/m 4. flexural strength:100N/mm2 5. tensile strength:.>=60N/mm2 6. modulus of elasticity:2400Mpa 7. tensile stress at break:>=65Mpa 8. elongation at break:>100% 9. specific heat:1.17KJ/Kg·K 10. heat conductivity:0.2W/m2·K 11. heat deflection temperature:1400C 12. coefficient of thermal expansion:0.067mm/m·0C 13. range of temperature:-40 +1200C 14. effect of soundproof: 10mm thickness, 33 dB less