Patent ID: 7582353

Claim:
A monofilament comprising a vinylidene fluoride-based resin, said monofilament including 1.5% to 3.8% by mass of a comonomer component, and having an intrinsic viscosity of 1.3 dl/g to 2.0 dl/g and a melting point of 167° C. to 174° C., wherein the monofilament comprises a longitudinally extending core and a sheath disposed about said core part, wherein the core and the sheath include vinylidene fluoride-based resin, wherein a complex ratio of core material-to-sheath material is between 75:25 and 82:18, wherein the difference between a melting point of the core material and a melting point of the sheath material is less than 5° C., and wherein the inherent viscosity of the core is higher than the inherent viscosity of the sheath.