Resin compositions, monofilaments, process for producing the same and fishing lines
AssigneeKureha Corporation
InventorsSatoshi Hashimoto, Shingo Taniguchi, Yasuhiro Tada, Masayuki Hino, Masaru Satou, Takeo Takahashi
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Abstract
Monofilaments comprising resin compositions which contain 1% by mass or more of a comonomer component (for example, hexafluoropropylene), have an intrinsic viscosity of 1.3 dl/g or more and a melting point of 165° C. or higher and contain a PVDF-based resin. Owing to the above composition and physical properties, the crystallinity and elastic modulus of the PVDF-based resin are altered. As a result, an appropriate flexibility can be imparted to the monofilaments while preventing deterioration in the mechanical properties.
Claims19
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.
A method of making a monofilament comprising a vinylidene fluoride-based resin, said method comprising:
- a preparing step of preparing a resin composition including a vinylidene fluoride-based resin comprising a comonomer component such that said comonomer component has a content of 1.5% to 3.8% by mass in said monofilament, and said monofilament has an intrinsic viscosity of 1.3 dl/g to 2.0 dl/g and a melting point of 167° C. to 174° C.;
- and a drawing step of spinning said resin composition at a predetermined extrusion temperature and then drawing thus spun resin composition to a ratio within the range of 5.9 to 6.2, 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.
Dependencies are inferred from the claim text.