design wrote:
Thanks for replies. Actually, I was now told by factory that it is Polyurethane.
Question is what are the possible reasons for this ease of scratching and scraping. Is it necessarily the quality of PU or other factor.
There are ASTM and ISO standards for poly. I'd suggest you ask your supplier to provide evidence of compliance to one or more of the applicable standards. Note that Chinese companies are not obligated to abide by US or International standards for anything, although some do if they are exporting.
There have been many problems with this aspect of Chinese exports on a variety of products as I'm sure you are aware - occasionally one will make the news. There was a huge problem with their plywood a few years back, and I'm not sure if it has been resolved yet.
This organization may be able to assist you, and they have info regarding the various product standards that apply in the US.
http://www.polyurethane.org/s_api/sec.a ... 4&DID=4059
Good luck.
PS: Getting to the bottom of this may be very time consuming and frustrating, and may not be worth the effort. I dealt with these kinds of issues in the aerospace industry for quite a few years. It is not an easy task, and often leads to somebody getting lawyered up.