JPH09262046A - Fishing line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fishing line hardly inducing a slack part from a tip of a fishing rod to a float and suitable for fishing of a sweetfish, etc., without losing a delicate strike of the fish, comprising a polyester filament having respectively prescribed tensile strength, knot strength and elastic recovery. SOLUTION: This fishing line is composed of a polyester filament such as polypropylene terephthalate or polybutylene terephthalate having >=6.0g/de tensile strength, >=4.0g/de knot strength and >=80% elastic recovery at 20% elongation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fishing line made of polyester filament, and more particularly to a fishing line having high strength and elastic recovery, which is suitable for fishing of sweetfish, hellebuna and the like.

[0002]

2. Description of the Related Art Generally, a fishing line for connecting a fishing line or a reel bobbin to a fishing hook is composed of a relatively thick running thread and Harris from the running thread to the fishing hook. The characteristics required for these yarns and Harris are (1) large tensile strength,
(2) Greater knot strength with doku and sashimi,
(3) Difficult to have curl, (4) Easy to adapt to reel, (5) Easy to sink, (6) Small underwater resistance, (7) Difficult to curl, (8) It is hard to wear due to rock slip, etc., (9) it can be sensed well, (10) it is transparent, and (11) in some cases it has good visibility on the contrary.

Conventionally, polyamide, polyethylene, and the like have been used according to the fishing conditions such as target fish, fishing ground, weather, and fishing time.
Monofilaments having different thicknesses such as polyethylene terephthalate are used as fishing lines, and polyamides have been mainly used as fishing lines from the viewpoint of strength.
However, the water absorbency of polyamide tends to lower the tensile strength and knot strength in water or in a wet condition. On the other hand, high-strength polyethylene monofilaments have higher tensile strength and lower elongation than polyamides, and are therefore frequently used for fishing lines. However, since the specific gravity of polyethylene itself is lower than that of other resins, the fishing line made of such high-strength polyethylene monofilament tends to float near the surface of the water, and when fish etc. hit the fishing hook, the area around There was a problem that it was delayed in transmission, and the fishhook moved unnaturally in the water, causing the fish to be wary. In addition, polyethylene terephthalate monofilament may be used as fishing line, but it is too hard and tends to have a winding tendency.
Does not fit into the cable, it is easy to cut when a large force is applied,
It has drawbacks such as insufficient impact resistance.

[0004]

DISCLOSURE OF THE INVENTION The present invention has a tensile strength and a knot strength satisfying as a fishing line, and a specific gravity of fresh water and that of fresh water as compared with the above-mentioned fishing line composed of polyamide, polyethylene and polyethylene terephthalate monofilament. An object of the present invention is to provide a fishing line that is higher than the specific gravity of seawater, is easy to operate with respect to the movement of fish and the like hooked on a fishing hook, and is not cut when a large force is applied.

[0005]

According to the present invention, the above-mentioned objects are as follows: Tensile strength of 6.0 g / denier or more, Knot strength of 4.0 g / denier or more, and elastic recovery rate at 20% elongation. It is achieved by providing a fishing line consisting of polyester filaments having a ratio of 80% or more. Examples of the polyester having the above properties include polypropylene terephthalate (hereinafter abbreviated as PPT) and polybutylene terephthalate (hereinafter abbreviated as PBT), which is a copolymer of PPT and PET. It may be. These may be copolymerized with a third component, specifically, ethylene glycol, 1,4-butanediol,
Pentamethylene glycol, hexamethylene glycol
Aliphatic diols such as polyethylene glycol and polyethylene glycol; isophthalic acid, 5-sodium sulfoisophthalic acid, 1,4
-Aromatic dicarboxylic acids such as naphthalenedicarboxylic acid and 1,5-naphthalenedicarboxylic acid; alicyclic diols such as 1,4-cyclohexanedimethanol and the like, which impair the mechanical properties described above. It can be a copolymerization component within the range not present.

The above polyester preferably has an intrinsic viscosity of 0.8 or more and 2.5 or less.
When the intrinsic viscosity is less than 0.8, the tensile strength and the knot strength are poor and it becomes difficult to obtain the target fishing line.
On the other hand, if the intrinsic viscosity exceeds 2.5, spinnability becomes difficult.

In the present invention, the "filament" may be not only a polyester monofilament but also a polyester multifilament, and a twisted yarn obtained by twisting the polyester multifilament or a braided product in which the polyester multifilament is assembled. The twisted yarn or the braid is a polyester multifilament 100.
%, Or it may be produced in combination with a polyamide fiber yarn or a polyolefin fiber yarn.

In order to impart flexural abrasion resistance to the above-mentioned polyester filament, it is preferable to apply a silicone-based or Teflon-based surface treatment agent. Specific examples include amino-modified silicone, fluorine-modified silicone, fluorine polymer emulsion, and Teflon emulsion.

The fishing line of the present invention has a tensile strength of 6.0 g / denier.
Or more, knot strength is 4.0 g / denier or more, and 20
It has excellent mechanical properties such that the elastic recovery rate at 80% elongation is 80% or more. In particular, it exhibits extremely excellent performance as a fishing line for ayu fishing and is easy to handle. As is well known for ayu fishing, there is a fishing method called friend fishing, in which a live ayu is tied with a nose ring and released into the water, and this is used as a decoy to draw and hook other ayu to catch fish.
In this case, it is necessary for the decoy ayu to be able to freely and lively swim for a long time in a natural state, and it is also necessary to have a property capable of withstanding a sudden turning of a fish.
For this purpose, not only lightness and strength as fishing line characteristics,
High elastic recovery is required. Since conventional fishing lines made of polyamide, polyolefin, and polyethylene terephthalate fibers have low elastic recovery, even if the decoy can swim freely in water, it can withstand the force applied to the fishing line due to a sudden turn. There was a problem I couldn't do. The fishing line of the present invention solves such a problem.

The fishing line of the present invention has a tensile strength of 6.0.
If it is less than g / denier, it is necessary to increase the fineness of the fishing line in order to obtain the required strength for the fishing line, and the length of the fishing line that can be wound around the reel is shortened, so that the fishing line reaches the desired depth. Cannot be extended. The knot strength is 4.0
If it is less than g / denier, it is easy to cut with a knot, and
% If the elastic recovery at extension is less than 80%, the decoy in the Ayu friend fishing method cannot freely and vividly swim for a long time in the natural state, and the fishing line cuts due to a sudden turning of the fish. Occurs.

Further, since the fishing line of the present invention is composed of polyester filaments, it has a larger specific gravity than fresh water or seawater, which makes it easier to detect when a fish or the like hits the hook, and the fishing line is underwater. There is no problem that the fishhooks that come out of the water move unnaturally in the water, causing the fish to be wary.

[0012]

EXAMPLES The present invention will be described below in detail with reference to examples, but the present invention is not limited to these examples. In addition, each measured value in an Example is a value measured by the following method. (1) Intrinsic viscosity (dl / g) of polyester It is a value measured at 30 ° C. in a mixed solvent of phenol / tetrachloroethane (equal weight ratio). (2) Tensile strength (g / denier) It is a value measured according to JIS L 1013. (3) Knot strength (g / denier) A value measured according to JIS L 1013. (4) Elastic recovery (%) Constant speed extension type tensile tester with automatic recorder (Instron 1
122, manufactured by Instron Co., Ltd.)
/ Attached to the gripping interval of 20 cm under the initial load of denier, stretched to 20% at a pulling speed of 10 cm / min, then immediately unload at the same speed, left for 2 minutes, and then again at the same speed And stretch it to a certain level. The residual elongation was measured from the recorded load-elongation curve and calculated by the following formula. Elastic recovery rate (%) = [(L ₁ −L ₂ ) / L ₁ ] × 100 where L ₁ is the elongation at 20% elongation and L ₂ is the residual strain elongation.

Example 1 PPT having an intrinsic viscosity [η] = 1.5 was spun at 275 ° C.,
It was wound at a speed of 1000 m / min. 30 in a hot bath
The first drawing was carried out at ℃, followed by the second drawing by dry heat at 160 ℃, and the drawing was carried out so that the total draw ratio was 3.8 times, and a denier of 500 denier / 50 filaments was obtained. A filament was obtained. The mechanical properties of this multifilament are shown in Table 1. Using the obtained multifilament, a twisting machine was used to carry out actual twisting with a twist number of 150 M / T, and a silicone oil solution was applied to complete a fishing line product. When this fishing line was used for ayu fishing, the decoy was able to swim freely and lively for a long time in its natural state, and the line was not cut even when the fish swiftly turned.

Example 2 A PPT-PBT copolymer having an intrinsic viscosity [η] = 2.0 (90 mol% 1,3-propanediol and 10 mol% 1,4-butanediol) was used. Spin at 280 ° C, then perform primary drawing at 30 ° C in a warm bath, then 160 ° C
The second drawing was carried out by dry heat of No. 1 to give a total draw ratio of 3.5 times, and a 100 denier monofilament was obtained. The mechanical properties of this monofilament are shown in Table 1.
Shown in This monofilament coated with silicone oil solution was used as fishing line, and when used for friendship of ayu, the decoy ayu can swim freely and lively for a long time in a natural state, and against sudden turning of the fish. However, the thread was not cut.

Example 3 A multifilament of 500 denier / 50 filaments made of PPT was obtained in the same manner as in Example 1 except that 0.5% by weight of the pigment was contained. The mechanical properties of this multifilament are shown in Table 1. The obtained multifilament was used to braid an eight-strand braid to produce a fishing line. When I performed ayu fishing using this fishing line, the decoy was able to swim freely and lively for a long time in the natural state, and the line did not break even when the fish swiftly turned.

Comparative Example 1 PET having an intrinsic viscosity [η] = 0.8 was spun at 295 ° C.,
It was wound at a speed of 1000 m / min. Further, it was drawn at a draw ratio of 4.0 times to obtain a multifilament of 500 denier / 50 filament. The mechanical properties of this multifilament are shown in Table 1. Using the obtained multifilament, a twisting machine was used to carry out actual twisting with a twist number of 150 M / T, and a silicone oil solution was applied to complete a fishing line product. Ayu fishing was carried out using this fishing line, but it was unsuitable as a fishing line because the elasticity recovery was poor and the fish could not withstand a sudden turn and a shock broke out.

Comparative Example 2 PBT having an intrinsic viscosity [η] = 1.6 was spun at 270 ° C.,
It was wound at a speed of 1000 m / min. 25 in a hot bath
The first drawing was carried out at ℃, followed by the second drawing by dry heat at 160 ℃, and the drawing was carried out so that the total draw ratio was 3.8 times, and a denier of 500 denier / 50 filaments was obtained. A filament was obtained. The mechanical properties of this multifilament are shown in Table 1. Using the obtained multifilament, a twisting machine was used to carry out actual twisting with a twist number of 150 M / T, and a silicone oil solution was applied to complete a fishing line product. Ayu fishing was carried out using this fishing line, but it was unsuitable as a fishing line because the elasticity recovery was poor and the fish could not withstand a sudden turn and a shock broke out. In addition, since the light fastness was poor, the fishing line was discolored.

Comparative Example 3 PPT having an intrinsic viscosity [η] = 0.7 was spun at 275 ° C.,
It was wound at a speed of 1000 m / min. 30 in a hot bath
The first drawing was performed at ℃, followed by the second drawing by dry heat at 160 ℃, so that the total draw ratio was 3.5 times, and a denier of 500 denier / 50 filaments was obtained. A filament was obtained. The mechanical properties of this multifilament are shown in Table 1. Using the obtained multifilament, a twisting machine was used to carry out actual twisting with a twist number of 150 M / T, and a silicone oil solution was applied to complete a fishing line product. Ayu fishing was carried out using this fishing line, but it was unsuitable as a fishing line because of its poor tensile strength and knot strength.

[0019]

[Table 1]

[0020]

INDUSTRIAL APPLICABILITY The fishing line of the present invention has sufficient tensile strength and knot strength as a fishing line, and has a specific gravity higher than that of fresh water and seawater. Since it is stretched, it does not miss the delicate part of the fish, and it is easy to operate with respect to the movement of the fish hooked on the fishing hook, and there is no cutting when a large force is applied.

[Brief description of drawings]

FIG. 1 is a diagram showing a load-elongation curve for calculating elastic recovery in the present invention.

Claims (1)

[Claims] 1. A fishing line comprising a polyester filament having a tensile strength of 6.0 g / denier or more, a knot strength of 4.0 g / denier or more, and an elastic recovery rate at 20% elongation of 80% or more.