What is the material of the thread with anchor?

the wire with anchor is made of polyethylene. Because the suture of the belt anchor nail is made of ultra-high molecular weight polyethylene material which meets the requirements of type 1 in GB/T1971.1 standard, there is no coating, and the suture needle is made of stainless steel material 63 which meets the requirements of YY/T726 standard. Therefore, the thread with anchor is made of polyethylene material.