15-11-2006, 10:09 PM | #11 |
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Wow, Dan I hounestly thought it was a glass, yes perspex is an acrylic / plastic sheet material and is quite expensive, it is very brittle to cut.
But I always thought this also filtered out the UV too. Ade
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Ade ----------------------------------------------- Y.O.B 1971 (40 years young! ) My Tortoises :- Dug (Testudo Graeca Ibera Terrestris (Syrian), Penny, JJ (JennyJack), Buttons and Gem (Testudo Graeca Ibera) |
15-11-2006, 10:10 PM | #12 |
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Sorry Kelly!!!!!
Ade xx
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Ade ----------------------------------------------- Y.O.B 1971 (40 years young! ) My Tortoises :- Dug (Testudo Graeca Ibera Terrestris (Syrian), Penny, JJ (JennyJack), Buttons and Gem (Testudo Graeca Ibera) |
15-11-2006, 10:11 PM | #13 |
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Someone laugh at my joke
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15-11-2006, 10:14 PM | #14 |
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sorry pete i was laughing
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15-11-2006, 10:17 PM | #15 |
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How thick is it Ade? It doesn't sound like the same thing. Plexiglass isn't brittle and is pretty easy to cut. You can get it pretty thick here and it doesn't yellow in the sun. It only filters out about 2% of the UV light. Where glass does like 95%. It sounds like perplex might do the same as glass in filtering out the UV. I'll have to look into it
Dan and yes Pete your joke was very funny
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15-11-2006, 10:22 PM | #16 |
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Dan it can be got in various thicknesses, from 3mm upwards.
This stuff is clear like glass, doesnt discolour much definately not yellowing, tends to go opaque, (less see through) as it ages almost white looking. It is flexible in position but cutting it to size it is fragile as it can split / crack like glass and before you know it the split is across the front of it. Ade
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15-11-2006, 10:23 PM | #17 |
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Polymethyl methacrylate (PMMA) or poly(methyl 2-methylpropenoate) is the synthetic polymer of methyl methacrylate. This thermoplastic and transparent plastic is sold by the tradenames Plexiglas, Perspex, Plazcryl, Acrylite, Acrylplast, Altuglas, and Lucite and is commonly called acrylic glass or simply acrylic.
PMMA is lighter: its density (1190 kg/m3) is less than half the density of glass which is 2400 to 2800 kg/m3 . PMMA does not shatter PMMA is softer and more easily scratched than glass. This can be overcome with scratch-resistant coatings. PMMA can be easily formed, by heating it to 100 degrees Celsius. PMMA transmits more light (92% of visible light) than glass. Unlike glass, PMMA does not filter UV (ultraviolet) light. PMMA transmits UV light, at best intensity, down to 300 nm. Some manufacturers coat their PMMA with UV films to add this property. On the other hand, PMMA molecules have great UV stability compared to polycarbonate. PMMA allows infrared light of up to 2800 nm wavelength to pass. IR of longer wavelengths, up to 25,000 nm, are essentially blocked. Special formulations of colored PMMA exist to allow specific IR wavelengths to pass while blocking visible light (for remote control or heat sensor applications, for example). Dan
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15-11-2006, 10:29 PM | #18 |
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my hubby has just used some Perspex, and when you buy it ,it comes in a protected seal and he said it has written on the pastic seal Plexiglas now i even didnt know that
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15-11-2006, 10:40 PM | #19 |
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Thats great info Dan,
Perpex is fine then, brilliant. Thanks. Ade
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16-11-2006, 03:31 AM | #20 |
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Everybody is very welcome
Dan
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