Polypropylene or polypropylene fabric
it should be polypropylene, a kind of plastic. . .
it depends on the type of the carpet, now there are a lot of plastic carpets on the market , chemical materials will be more in carpets with worse quanlity,so suggest to buy carpet with a better quality, at least it guarantees the quality, in addition to the polypropylene mentioned above (also have PVC, PVC, plastic and rubber)
