Patent ID: 7597957

Claim:
A polyvinylidenefluoride resin monofilament, comprising: a polyvinylidenefluoride resin (a); and a copolymer of vinylidenefluoride and fluoroalkene (b), wherein the polyvinylidenefluoride resin monofilament is formed by a polyvinylidenefluoride resin composition (A) including (a) and (b) as composition ingredients, wherein the fluoroalkene content in the polyvinylidenefluoride resin monofilament is 1 mass % or more and less than 6 mass %, and the polyvinylidenefluoride resin monofilament has a monofilament diameter of 0.5 mm or more, and wherein the monofilament diameter is 0.5 to 3 mm, there is no spread of cavity with a rough diameter of 0.5 mm or more in the fiber axis direction of the oriented monofilament resulting from a cavity generated in unoriented monofilament, that the tensile strength at break is 600 MPa or more and the tensile elongation at break is 15 to 35%.