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Moldable Plastic Sheeting

12/02/2013 7:24 PM

Hi all...

I am looking for clear plastic sheeting no more than a half millimeter thick (think objects like plastic drink bottles) that I can apply heat from a hair dryer or similar to mold over objects. I realize that commercially they achieve this by heat and vacuum, but is there something similar on the market for my requirements?

I have an emblem (5cm square) that has a raised surface about 2mm thick. I need to drill/route some holes on the raised area but would like to cover the whole emblem afterwards to avoid water entering the holes and yet look professional finish.

I have been googling with no success. I seem to get only pellets or such that when heated become mailable but not sheets. Anyone used or know of such sheets? OR alternate ideas welcome.

Thanks

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#1

Re: Moldable Plastic Sheeting

12/02/2013 7:41 PM

Butyrate sheet has a very low softening temperature.

Cellulose Acetate Butyrate - Emco Industrial Plastics


You really need to "pull" a vacuum to get a good fit.

In its simplest form, Mattel Vacuform: Toys & Hobbies | eBay was a toy that demonstrated the concept.

You will fail without vacuum, even if its just the wife's vacuum cleaner.

Look on Youtube, there must be lots there.

Go to a hobby store.

Vacuum forming is the key word.

Vacuum Forming Home Style - YouTube

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#2

Re: Moldable Plastic Sheeting

12/03/2013 12:38 AM

Never tried this stuff, but it looks like it might work....

"StyroCoat® Plastic is a sprayable polyurethane plastic formulated to economically coat a variety of surfaces. Dispensed through Smooth-On's EZ~Spray®, Jr. cartridge system, the plastic cures in about 2 seconds and can be applied to vertical surfaces without running off. An advantage of the system is that large areas can be covered in a short period of time. Cured plastic is lightweight, impact resistant, and water resistant.It can be sanded for priming and painting. Plastic can also be sprayed into a rubber mold to make fast, impact resistant castings (application of a release agent may be necessary before spraying into the mold)."

https://www.smooth-on.com/index.php?cPath=1287

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#4
In reply to #2

Re: Moldable Plastic Sheeting

12/03/2013 5:48 AM

Unless I've missed something: I don't think it's clear/transparent.

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#5
In reply to #4

Re: Moldable Plastic Sheeting

12/03/2013 10:38 AM
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#3

Re: Moldable Plastic Sheeting

12/03/2013 5:46 AM

clear plastic coating spray

re-do the google search from where you are.

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#6

Re: Moldable Plastic Sheeting

12/03/2013 2:32 PM

PETG sheets are available. Haven't molded it around anything. I have bend and shaped it to form guards with a heat gun.

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#7

Re: Moldable Plastic Sheeting

12/03/2013 10:33 PM

I have used actual plastic bottles to vacuum form into Pendants and stuff.

A vacuum form is easy to make, providing you are looking for something small.

Larger ones become more difficult, but not much.

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#8

Re: Moldable Plastic Sheeting

12/03/2013 11:11 PM

If the emblem is metal then vacuum forming a semi rigid plastic such as PET, PETG, CAB or PS will not likely obtain the result you wish as the plastic will shrink on cooling and then not fit back on the emblem. I would suggest you search out a clear MacTac. It comes with an adhesive back which will adhere to the emblem, be thin enough not to deform the appearance of the substrate and is formable however i would strongly suggest using a vacuum cleaner. In this order… 1. Heat the emblem slightly with a heat gun. 2. Peel the carrier film from the back of the MacTac and lay over the emblem. 3. Heat gently until it starts to sag. 4. Place both quickly in a clear plastic bag and close the end of the bag over a vacuum nozzle. 5. Have someone turn on the vacuum, and watch it form to the contours of the emblem. 6. Trim excess off. Alternatively, you could seek out a clear plastisol but this would mean placing the emblem in an oven (Toaster oven will do) getting it up over 250 then dipping it in the plastisol and then back in the over to fuse. The dipping works best if you have a small hose into the bottom of the plastisol container and blow gently to aerate the powder. Have Fun!

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#9

Re: Moldable Plastic Sheeting

12/04/2013 11:17 AM

Just my tuppence worth....

Why not use some laminate film pouches, just pop the emblem into a pouch heat and seal, then perhaps trim?

If the emblem is only 2 mm thick you might get it to go through a laminating machine?

John.

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#10

Re: Moldable Plastic Sheeting

12/04/2013 12:53 PM

Hi daffy

You can easily make a small scale vac former see pic. The air is pulled out through the tiny holes using a household vacuum cleaner and the plastic is clamped with a suitable plate using screws or clamps. The base would have to be hollow so a base plate would be glued over it. I have done this before for simple shapes. Use heat gun as stated. Good luck.

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#11

Re: Moldable Plastic Sheeting

12/04/2013 11:38 PM

Thanks for all the leads...I will be trying some of these suggestions.

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#12

Re: Moldable Plastic Sheeting

12/05/2013 3:04 PM

Have you looked at MinWax clear acrylic spray? or paint it on. You can keep going, layer after layer after you practice making each layer smooth. You can build up a significant thickness this way. My wife did this on some counter tops she faux painted to look like stone, and it works like gang-busters.

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