What is the material of artificial grass?

What is the material of artificial grass?

The materials of artificial grass for sports field are generally PE (polyethylene), PP (polypropylene), PA (nylon)
①Polyethylene (PE): good performance, widely accepted by the public; often used to make artificial grass for football field
②Polypropylene (PP): grass fiber is harder, often used to make artificial grass for tennis courts, artificial grass for basketball courts, etc.;
③Nylon (Nylon): the price is relatively expensive, mainly used for high-end venues such as golf.