Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1999-10-21
2000-10-17
Edwards, Newton
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
478394, 43 4498, D01F 610
Patent
active
061328693
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a monofilament formed of a vinylidene fluoride resin and to a fishing line formed of the monofilamnent, particularly a fishing line for fishing with a lure (hereinafter referred to as "lure fishing"). More particularly, the present invention relates to a monofilament formed of a vinylidene fluoride resin having an elastic modulus falling within a specific range. The monofilament of the present invention has a feature that undesirable curling--e.g., a phenomenon that curling of a monofilament occurs when the monofilament is released after being wound around a reel for a specific time--is difficult to occur and, even when curling occurs, it can readily be relieved so that the monofilament returns to the initial state, and is suitably used as a fishing line.
BACKGROUND ART
A monofilament formed of a vinylidene fluoride resin is used as a raw material for a fishing line or a fishing net, because the monofilament has excellent physical and chemical properties, inter alia, excellent mechanical strength and durability, and exhibits least deterioration in strength while immersed in water, due to substantially no swelling with water. Recently, fishing with a lure or with a casting net has become a popular sport, as part of the trend towards more and more people enjoying outdoor life. In such fishing, a spinning-type reel is predominantly employed. Therefore, desirable properties of a fishing line employed in such fishing are (1) excellent transmission of a strike; (2) flexibility and curling that is easy to relieve during use: and (3) excellent strength characteristics, particularly high tensile strength when tied.
There exists demand for a fishing line that completely satisfies all the above properties or a fishing line that satisfies all the above properties to a considerable degree, one of the properties predominating so as to suit a specific method of fishing.
In view of the foregoing, an object of the present invention is to provide a monofilament formed of a vinylidene fluoride resin having a feature that undesirable curling is difficult to occur and, even when curling occurs, it can readily be relieved so that the monofilament returns to the initial state. Another object of the invention is to provide a fishing line formed of the monofilament. Still another object of the invention is to provide a fishing line formed of the monofilament for lure fishing.
The present inventors have conducted earnest studies, and have found that a monofilament formed of a vinylidene fluoride resin having a ratio of the elastic modulus at a certain elongation to that at another elongation that falls within a specific range and an elastic modulus at a specific elongation that falls within a specific range exhibits a feature that undesirable curling is difficult to occur and, even when curling occurs, it can readily be relieved so that the monofilament returns to the initial state. The present invention has been accomplished based on this finding.
DISCLOSURE OF THE INVENTION
Accordingly, the present invention provides a monofilament formed of a vinylidene fluoride resin, which satisfies a relationship between the elastic modulus at a tensile elongation of 15% (Y15) and the initial elastic modulus (Y0) of 0.85.ltoreq.(Y15/Y0).ltoreq.1.3, with a Y15 value ranging from 200 to 350 kg/mm.sup.2. Preferably, the monofilament has a tensile elongation of 30-50%. The present invention also provides a fishing line formed of the monofilament. Further, the present invention also provides a fishing line formed of the monofilament for lure fishing. The monofilament according to the present invention is transparent, and has appropriate mechanical strength and a feature that undesirable curling is difficult to occur and, even when curling occurs, it can readily be relieved so that the monofilament returns to the initial state. Therefore, the monofilament is suitable for a fishing line, particularly a fishing line for lure fishing.
BEST MADE FOR CARRYING OUT THE INVENTION
The vinylidene flu
REFERENCES:
patent: 4667001 (1987-05-01), Mizuno
Mizuno Fumiya
Munakata Kazuyuki
Ohira Seiichi
Sato Suguru
Edwards Newton
Kureha Chemical Industry Co. Ltd.
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