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Old Jun 16, 2014, 10:41 PM
Crash Test Dummy
Brunei, Brunei-Muara, Masin
Joined Nov 2013
130 Posts
It is a pain and it does shrink. I sandwich it between two metal baking trays and bring the whole thing across to the vacuum bagger - which holds the heat in long enough to get it in the bag and the pump working, but it is hit and miss. I would have to reheat 50% of the sheets on a good day.

But without access to the kinds of plastics you have, needs must and necessity is the mother of invention.

My most successful is with 'Just Juice' bottles - I haven't measured them, but they are at least 5x thicker than the water bottle PET, but more difficult to cut out and lay flat. Saying that, they do give you a lot of real estate to work with. And at $7 a bottle, we don't often buy it.

I have one clean JJ bottle left, I will try and make some up this week and take pics and accurate times/temps.

I have found the worse shrinkage with my oven set to 'fan' - the hot air blowing over the sheets to get them in a 'ready to sandwich' form makes them crinkle at the edges and shrink a lot more than when the oven is on conventional heat.

EDIT: one thing that may be in my favour - my kitchen is ungodly hot - ambient is around 35C, plus the heat from the oven. At least I'm not fighting off the mossies, like I do in my wood shop. No AC, 5 feet from the jungle and I have to leave the door open or expire. It means woodworking is done at high speed
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Old Jun 18, 2014, 08:03 AM
I don't like your altitude
Stupot46's Avatar
Joined Sep 2011
3,352 Posts
I've made a couple of canopies by connecting the bottle to a household vac and heating at the same time.Cut the bottom off the bottle,wedge the plug in place,retape the base and form.
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Old Jun 24, 2014, 05:16 PM
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TLHover's Avatar
Australia, NSW, Wauchope
Joined Jan 2012
330 Posts
Since this thread is alive again, I have a question.
I've successfully molded a canopy for my guppy glider yesterday but was wondering what adhesive s stick to this type of plastic.
Any advice? Sikaflex maybe?
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