Will Mylar burn or can it with stand high heat?

FilthyFletch

Mr I Can Do That For Half
Ok for you science guys out there fdd Mz mogie Video or whoever. Heres my question and thinking of why I would like to know.Ok so I decided not to buy exspensive hydrofarm light reflectors when I can make them for half the price in an hour or so at home.I used my 1 I had bought took the measurements and made my template from cardboard transfered it some steel sheets and cut it out.I have the option to weld the corners or just jb weld them with corner plates similar to how the origianl corner plates are made.I did the whole thing in a good high heat metal engine primer then a good 4 coats of high temp engine flate white but now heres the mylar question. I was curious.In the original they have like a half circle sheet in the reflector that kinda concentrates the light downward. Theres is white but I was thinking I could built the same arc piece but instead of painting it white I could use ultra high temp resistant adhesive and basically glue the mylar to this piece and install it into the reflector.Now this mylar covered piece would be inside the reflector hood at about 3 inches from the bulb.Is mylar heat resistant enough to handle the heat this close or will it burn? Im not sure if mylar is actual metal or if its a synthetic material that will burn.Any ideas or should I just touch some to an extra light I have laying around? Would hate to do it if anyone already knows. Lets get some thoughts on it..Thanks Im waiting as I wann get these new reflectors done soon.
 

bigbudeddie

Well-Known Member
Mylar temperature range (–70 to 150°C [–94 to 302°F]), and it is also used at temperatures from –250 to 200°C (–418 to 392°F) when the physical requirements are not as demanding. Im not sure what a HID lamp running temp is but im pretty sure it wouldnt be more than 200°C. Peace
 

7xstall

Well-Known Member
before i even say this - i know, i know - the great taboo.

aluminum foil can take some serious heat. :)

check the manufacturer's specs on the melting point of your particular brand of mylar. most likely it will shrivel up and deform with the temps you'll be getting that close to the light. there are many different types of mylar, but most civilian products are not very good with high heat.




:)

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mogie

Well-Known Member
Mylar is a chemical resistant, polyester film that is mostly tear resistant depending on mil. The reinforced Mylar is almost impossible to tear. It can withstand temperatures of up to 200 degrees Celsius, Mylar is also electrical resistant and fire retardant.
 

7xstall

Well-Known Member
just saying......i think there's a good reason you don't see mylar reflector hoods anywhere online..... :)



and again, as we KNOW from fdd's test (and extensive documents online), so no one gets confused, mylar is conductive.








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7xstall

Well-Known Member
to really make sure this gets through, mylar with any metal inside it is conductive (mylar that is reflective has metal in it). the plastic by itself is a fairly good insulator.






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FilthyFletch

Mr I Can Do That For Half
Ok I think I have my answer.First (looking at 7x...dont mention the forbidden "F" word again lol). I know there is no mylar reflectors out and now I will patent this idea actual will do it rigfht now online.Id rather paint my reflector the flate white it is right now then use foil as foil reflectivity is not very good anyways and I like my projects to look professional. When I finish Ill post some pics.Think I may cut the vent holes so this can be vented with a simple inline fan setup.Thanks guys
 

Jonny 5

New Member
Hi all. Well here is my 2 cents. I had a plant outside last summer and it was sitting in front of a mirror. The plant went apechit, I'm building my new box w mirrors. I hope it works, and good luck
 
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