Patent ID: 7378148

Claim:
A stretched monofilament comprising a continuous stretched and heat-set first layer consisting of at least one plastic selected from the group consisting of polyethylene terephthalate, polyamide, and polyamide copolymer, a continuous stretched and heat-set plastic second layer at least partially enclosing, bonded to, and extending a full length of the first portion, and a continuous stretched and heat-set third layer at least partially enclosing, bonded to, and extending a full length of the second layer and having a composition different from that of the first layer and selected from the group consisting of polyethylene, polyoxymethylene, polyphenylene sulfide, polymethylmethcrylate, polybutylene terephthalate, polyether etherketone and polyethylene naphthalate, the second layer being sandwiched between the first layer and third layer.