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Trivex vs. Polycarbonate

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Windy	12/08/2011 11:55:59
910 forum posts 197 photos	I was at my opticians today for a regular eye test and he showed me a material called Trivex that has uses for safety glasses. He gave me a disc that had a spiral cut in it to weaken it and said try to break it. It was tough yet flexable and according to one web site. Younger Optics guarantees its Trivex products (Trilogy) for life, against stress fractures and drill mount cracking. Depending on the cost and availability. it might be of use to some of our experimental model engineers Windy.
Michael Gilligan	12/08/2011 17:23:52
23121 forum posts 1360 photos	Thanks, both, for this useful info. David has aleady warned about Polycarbonate's poor chemical resistance. I would just add the, perhaps surprising, note that this includes Loctite ... which causes embrittlement. MichaelG.
Jeff Dayman	12/08/2011 19:21:55
2356 forum posts 47 photos	Bear in mind when experimenting with Trivex that it is a modified two part polyurethane resin. As such it is quite flammable. It should not be used in pressure vessels or at temps exceeding 100 deg C. It is a viable alterate to polycarbonate for some applications and is lighter than PC and other transparent resins, but has many of the same operating limitations. Primary industrial uses for it are eyeglass lenses and aircraft windscreens.

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