Storage Binder Vinyl - ?

I am a vinyl chemist by trade.

I wouldn't worry much about the binder. I use them myself.


As for determining if it is PVC or not, you can test that if you want with just a cup of water and a lighter.

Easy vinyl / PVC test:
1. Cut a small sample of the material in question. Make sure it is all the same material, no glues or cardboard or other plastics stuck to it. It can't be a hollow part either.
2. Drop it in a cup of water. Make sure there isn't an air bubble floating it up. Make sure to break the surface tension of the water by submerging it and shaking it around to get any air off the part.
3. If it floats without a bubble or surface tension, it can not be vinyl / PVC. 100% certain.
4. If it sinks, it may be vinyl, we need to test it further.
5. Safety first.
6. Light that sample on fire.
7. Vinyl will give off hydrochloric acid, it is an offensive smell. It will also have a green tint to the flame from the chlorine. It will also char black, it will not drip like a candle. It will produce smoke too.


Fairly simple.

Here is a handy chart to determine what type of plastic you have in front of you good for most common plastics.

http://www.consultekusa.com/pdf/Tec...chart%20.pdf

Thanks Buckeye, really good information.

I looked at the plastic identification chart above and it does not show PLA (polylactic acid) which is used by many 3d printers. Is this type of plastic safe to use to make coin trays?

I plan on flocking the trays before using them with a product called Donjer suede-tex (www.flockit.com). The adhesive contains the following: alkalyd resin, lecithin,titanium dioxide,calcium carbonate and mineral spirits.

It does sound rather toxic, I will contact the company to see what they recommend or if they have an alternate adhesive.