Excellent Scratch-Resistant Materials?

If you need the material to be transparent, I would suggest sapphire.

Thank you all the same!

But i think it is too expensive and too fragile to be used as a children game tablet.

There is a plastic I believe called "Makrolon"
(trade name) which is extremely immune to damage.
i.e. scratching etc. In fact so much so, one can hit
it with a hammer and leave no mark or breakage.
(I have used it for security windows, etc.)

A bit pricey, but excellent for anti-damage uses.

If you only need small pieces, offcuts may be obtainable
cheaper, and even slight rejects. Whatever material you
use, please always remember small children will invariably
try to eat and possibly choke on it!

Trusting this is of help.

jt.

I had to leave home when I was three; I couldn't
get on with my mother.

Thank you for your suggestion! You are circumspective!

You mean the plastic PC with trademark "Makrolon" ?It is real extremely immune to damage,absolutely,it can meet the impact test requirement of our production.

However ,In my memory, PC can be easily scratched,but i have no practical case study,so i am perplexed now.

Whether PC is scratch resistant or not?

The best material for scratch resistance is countertop laminate. The Maklon plastic product that you can not smash with a hammer scatches real easy, it doesn't break but you get a surface mar.

Thank you!

Someone suggested me to choose PMMA(common name :acrylic glass)

What do you think about PMMA?

Is surface coating viable? You can save money on using a more affordable substrate and then make sure the surface coating has your scratch resistance.

What base material are you going to use plastic, metal or ceramic?

Thank you very much!it is a good idea.

I am going to use plastic as the basic material,but i am not sure what kind of plastic is the best choice for basic material and which kind of surface coating is available, in other words, i am worried about the associativity between the basic material and the surface coating,i don't know what kinds of basic material and surface coating can match each other very well.

Can you give me some suggestion?

You would need something with a Rockwell R Hardness above ~100, so you're looking at a highly entangled PS, high density nylons, Ultem, phenolics or acrylics. If you have freedom in your processing route an "easy" way to surface coat with something like Ultem would be to take your host thermoplastic matrix above its Tg and then cold press the two together. Of course, if you are worried about CTE issues from a sandwich composition (like your customers are playing with the toy in Alaska or Antarctica) then this wouldn't be a very good idea. Form, fit and function, right?

You are so wise that your suggestion made all problems clear.

Thank you for your friendly help and best wish for you!

Look at www.kinlochusa.com

They work very well for scratch resistant properties on concrete. Probably will work on other things as well

Thank you for your information!

safety glass, a glass plastic laminate could give you the hard surface you desire at a ???reasonable??? price.