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Polycarbonate is a transparent high molecular weight, linear, low-crystalline plastic. It is generally sought out for its very high impact resistance which approaches 30 times that of safety glass. Light transmittance is 90 percent. In addition to being a very hard plastic, it has a very high modulus of elasticity making it resistant to creep; it has excellent electrical resistivity, and an operating temperature range of -275 F to 250 F. It is generally unaffected by greases, oils and acids. Hardness is 112-125 Rockwell R (73-78 M Scale). Heat deflection temperature is 275-285 Degrees F at 264 PSI. Easily fabricated by machining, drilling, and sawing with a low likelihood of cracking or chipping. Solvent resistance is poor but polycarbonate is easily bonded. Prolonged exposure to solvents with the material under stress will result in crazing and cracking.
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