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What types of plastic glass do not go white when bent, and what is the best cement to join it to itself, please? Answered

When I am mid-way through a project I start thinking about the next one! I want to build a small-ish fish tank with a curved front. I envisage building a former of wood and 'wrapping' the plexi-glass round it to meet in the middle at the back. I will heat the plexi-glass gently so it can be bent but hopefully retain most of its thickness. What kinds of plexi-glass can withstand being bent and not turn colour? Also, what would be the strongest kind of cement to secure that join? I intend to reinforce that join by 'sandwiching' it with an additional piece of plexi-glass to give a greater surface area for the join, as water is incredibly heavy! FWIW I will also have much thicker plexi-glass at the bottom and top (top with access holes) with plenty of silicone around all edges. Many thanks for stopping by; I appreciate any thoughts you have. I will be posting this project as an 'ible to say thanks for the help.

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rickharris

Best Answer 9 years ago

It won't go white if you heat it. there is little dange in heating acrylic except - Depending on how it has been stored it may have absorbed some water ( Oh yes it does for those disbelievers) When you heat it excessively the acrylic will bubble internally - This may or may not be a problem for you - try to keep the heat evenly spread and only just enough to bend it. We bend acrylic all the time at school for projects.

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rickharris

9 years ago

Most plastics will go white when bent cold - HOWEVER heat them up a little - around 130 deg C and then bend to keep the clear plastic clear. Simple when you know how. Acrylic - Plexi glass will bend when hot. use an electric heat gun with care or an oven.

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kevinhannanrickharris

Answer 9 years ago

Many thanks for your further reply,Rick. It was very re-assuring. Thanks!

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kevinhannanrickharris

Answer 9 years ago

Thanks Rick, I wasn't aware of the temp making a difference to the colour. I was going to heat the plexi-glass with a heat gun and let it bend under its own weight. Hopefully this will mean it will bend at the lowest temp; whether it will go white or not I'm not sure, but I have no way to measure the temp. Thanks again for your time,Rick!