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PETG protective film for vac-forming...really?

 
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DarthVader1
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Joined: 04 Nov 2007
Posts: 193
Location: Phenix City, AL
PostPosted: Sat Jul 02, 2011 4:52 pm    Post subject: PETG protective film for vac-forming...really? Reply with quote
Curious question... I've seen some vac-formed pieces before, that still have a protective film on them, I know since I have one for the past 5 years and still have the film attached. How that happened... I don't know.

I'm curious to know... can you heat up a .060" film of PETG plastic that has a protective film with no effect to the end result? I just feel that the film will be permanently stuck to the clear plastic once you do the vac-forming work. Should I remove it first before heating and do the whole process?
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Robert
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RRK4
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Joined: 17 May 2011
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PostPosted: Sat Jul 02, 2011 7:22 pm    Post subject: Reply with quote
Maybe just an underside oven?
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kayaker43
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Joined: 13 Jun 2007
Posts: 175
PostPosted: Sun Jul 03, 2011 11:47 am    Post subject: Reply with quote
You can sometimes leave the film on the side opposite the oven. It depends a lot on the quality of the film and depth of draw.
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Doug Walsh
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Hobby-Vac and Proto-Form machine plans

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DarthVader1
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Joined: 04 Nov 2007
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Location: Phenix City, AL
PostPosted: Mon Jul 04, 2011 11:31 am    Post subject: Reply with quote
I'm using a T.J. flip design table. The PETG is to make the face shield for the OCP POLICE HELMET replicas i'm working on.
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Robert
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