Author Topic: Cheaper Sheet Plastic For Model Building‏  (Read 11606 times)

Offline kerick

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Re: Cheaper Sheet Plastic For Model Building‏
« Reply #15 on: January 17, 2019, 02:41:13 AM »
Some food packaging is polystyrene. You have to check the recycling marking to see for sure. PS is ok but PEP is not worth the trouble. Bonus is that itís usually very thin and clear. Save the PEP ones for storing parts.

Offline apophenia

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Re: Cheaper Sheet Plastic For Model Building‏
« Reply #16 on: January 17, 2019, 05:44:18 AM »
Good thinking Mog! And the case interior will yield some interesting shapes.

Although most rigid CD cases are polystyrene (regular and transparent), some, more flexible cases are polypropylene (contact cement, maybe?).
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Offline Robomog

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Re: Cheaper Sheet Plastic For Model Building‏
« Reply #17 on: January 17, 2019, 07:00:15 AM »
I still can't believe for years  I had a source of glueable plastic to hand and didn't realise it was there. 

If you carefully cut the hinge off the clear top it will give you a natty little base that you can glue things to.

Kerick: I have found most food packaging to be PEP, but it often provides useful shapes for scratch builds. They do need a lot of extra work however, like a vac form with attitude!  ;)

As you rightly pointed out they are normally thin and make good windows  :smiley:

Apophenia: Didn't think of the vinyl/poly ones,. But gel super glue  or gorilla glue ought to do the trick.

 I feel another spaceship coming on............ ;D ;D

Mog
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Mostly Harmless...............

Offline kerick

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Re: Cheaper Sheet Plastic For Model Building‏
« Reply #18 on: January 17, 2019, 08:27:55 AM »
I found some plastic salad plates at the discount store that were polystyrene. Two of them glued face to face made a great saucer shape. I've found a few plastic cups and things that were PS. Your right, PEP is far more common. If the object doesn't have the recycling markings I can usually tell the two plastics apart. PS is more rigid while PEP is more flexible and has that slick feel to it.

Offline Frank3k

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Re: Cheaper Sheet Plastic For Model Building‏
« Reply #19 on: January 17, 2019, 08:34:55 AM »
One of the meany reasons I like to print in ABS (or HIPS, which is styrene) is that the leftover parts (supports, base, etc.) can be used as a part or melted in acetone of Tamiya Extra Thin to make styrene putty.

If anyone in the US wants some, PM me your address and I'll send a small box. I have about half a pound of ABS waste sitting around. I can always make more...

Offline Robomog

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Re: Cheaper Sheet Plastic For Model Building‏
« Reply #20 on: January 17, 2019, 04:02:54 PM »
 Way too far away for me !, i use sprues for my styrene putty

Mog
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Mostly Harmless...............

Offline jcf

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Re: Cheaper Sheet Plastic For Model Building‏
« Reply #21 on: February 04, 2019, 07:39:27 AM »
The CD cases are straight polystyrene, which is why they are both clear and brittle.
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Must leave successors more corrupted still."
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Offline kerick

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Re: Cheaper Sheet Plastic For Model Building‏
« Reply #22 on: February 04, 2019, 07:46:05 AM »
I scrapped out an old printer the other day. It was full of ABS parts that could be useful. One particular piece was PS and very thick. Just what I was looking for to cut out some helicopter rotor blades.

Offline Robomog

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Re: Cheaper Sheet Plastic For Model Building‏
« Reply #23 on: February 07, 2019, 06:49:25 AM »
The CD cases are straight polystyrene, which is why they are both clear and brittle.

That's interesting, the pigments they add to colour the plastic must also act as a 'softener'

Mog
>^-.-^<
Mostly Harmless...............