Dow Plastics - Calibre 303 10 TNT Polycarbonate
Polycarbonate is one of the toughest, most dimensionally stable thermoplastics over a wide temperature range. Polycarbonate has exceptionally high impact strength. Polycarbonate is unaffected by water below 140F and can be used in boiling water on a limited basis. Polycarbonate is unaffected by greases, oils detergents, aliphatic hydrocarbons, most mineral acids, and the higher alcohols. It is attacked by chlorinated hydrocarbons, and most aromatic solvents, esters, and ketones. Polycarbonate has a blue tinted transparency with a 89% light transmission.
Fasteners - Washers - Spacers - Lenses - Housings.
CALIBRE 300 series resins are general purpose, UL listed polycarbonate resins. CALIBRE 300 series resins exhibit an excellent physical property balance of heat resistance, and impact strength.
Physical Nominal Values (English) Test Method
Density - Specific Gravity (g/cc) 1.20 sp gr ASTM D792
Melt Flow Rate (300C/1.2 kg-O) 10 g/10 min ASTM D1238
Mold Shrink, Linear - Flow 0.0050 to 0.0070 in/in ASTM D955
Moisture Absorption @ Equil  (50%RH, 73F) 0.32 % ASTM D570
Water Absorption @ 24 hrs (73F) 0.15 % ASTM D570
Mechanical Nominal Values (English) Test Method
Tensile Modulus (2 in/min) 350,000 psi ASTM D638
Yield Stress 8,700 psi ASTM D638
Ultimate Tensile Strength 10,300 psi ASTM D638
Elongation @ Break 150 % ASTM D638
Flexural Modulus 350,000 psi ASTM D790
Flexural Strength 14,000 psi ASTM D790
Impact Nominal Values (English) Test Method
Notched izod Impact (73F, 0.125 in) 17.00 ft-lb/in ASTM D256
Unnotched Izod Impact (73F) No Break ft-lb/in ASTM D256
Instrumented Dart Impact @73F ( 0.125 in; 8,000 ipm) Total Energy: 770 in/lb ASTM D3763
Tensile Impact Strength (73F, Type S) 250 ft-lb/in ASTM D1822
Hardness Nominal Values (English) Test Method
Rockwell Hardness (R-Scale) 118 ASTM D785
Taber Abrasion Resistance (0.125 in, Haze) 45 % ASTM 1044
Thermal Nominal Values (English) Test Method
DTUL @264psi - Annealed (0.157 in) 286 F ASTM D648
DTUL @264psi - Unannealed (0.125 in) 262 F ASTM D648
DTUL @66psi - Annealed (0.157 in) 291 F ASTM D648
Vicat Sofeting Point 300 F ASTM D1525
CLTE, Flow (-40F to 180F) 38 x 10-6 ASTM D696
Electrical Nominal Values (English) Test Method
Volume Resistivity @ 73F Dry 2.0 x 1017 ohm-cm ASTM D257
Dielectric Strength 420 V/mil ASTM D149
Dielectric Constant (60 Hz) 3.0 ASTM D1507
Dielectric Constant (1, MHz) 3.0 ASTM D1507
Dissipation Factor (60 Hz) 0.001 ASTM D150
Dissipation Factor (1 MHz) 0.002 ASTM D150
Ignition Characteristics Nominal Values (English) Test Method
Flame Rating - UL (0.0625 in) HB UL 94
Flame Rating - UL (0.125 in) HB UL 94
Limiting Oxygen Index 26 % ASTM D2863
Average Extent of Burning 1 in ASTM D635
Optical Nominal Values (English) Test Method
Refractive Index 1.586 nD ASTM D542
Light Transmission 89.0 % ASTM D1003
Haze 1.0 % ASTM D1003
Rheological Nominal Values (English) Test Method
Melt Flow Rate 10 g/10min ASTM D1238