JPH0775472A - Longline - Google Patents

Abstract

PURPOSE:To solve difficult points of longline such as bulkiness of rope shown when rope is used in a former method because of several ten km length of a longline and remarkable adhesion of dirty things in sea because of unevenness which rope has on the surface. CONSTITUTION:This longline consists of a synthetic resin monofilament having thick diameter to which carbon black is added. An amount of carbon black added is 0.05-2.0wt.% and the synthetic resin monofilament is made of nylon or polyester and the monofilament has at least 2.87 mmphi fineness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long line made of synthetic resin monofilament.

[0002]

2. Description of the Related Art In a longline, a large number of fishing hooks are attached to a trunk rope at approximately equal intervals with threads called branches, and the trunk rope is supported at a certain depth in water by floating balls floating on the sea surface. The present invention mainly relates to the trunk rope, but the trunk rope is conventionally surface-treated with vinylon or ester rope (about 7 to 8 mmφ) with black resin (paint resin in which carbon black is mixed with synthetic resin). Is used. This black resin processing is intended to improve ultraviolet resistance and abrasion resistance.

[0003]

[Problems to be Solved by the Invention] Since a long rope has a length of several kilometers to several tens of kilometers, a rope becomes enormously bulky as in the past. Also, since the rope has a mountain shape on the surface, there is a significant difficulty in attaching dirt to the sea. The present invention is intended to solve such a difficulty in long lines.

[0004]

The present invention is a long line composed of a large diameter synthetic resin monofilament to which carbon black is added. The amount of carbon black added is 0.05 to 2.0
% Is preferable. If the addition amount is 0.05% or less, the desired effect cannot be obtained, and if it exceeds 2.0%, the properties such as strength and flexibility of the monofilament are deteriorated. The synthetic resin monofilament is nylon, polyester or the like, and is a thick filament having a thickness of at least 2.87 mmφ (No. 300). 25 for long line
Numbers 0 to 600 are practical thicknesses. As the nylon, a copolymer of 6 nylon and 6,6 nylon is preferable. The polyester is preferably polyethylene terephthalate.
Stretching and other additions to enhance strength are done as in conventional Harris.

[0005]

By using a monofilament for such a long rope, for example, in the case of nylon No. 400 (3.3 mmφ), the bulk becomes 1/2 or less as compared with the rope. In this way, the bulk is reduced.

When the drum is wound, the resistance is small and the drum can be wound up smoothly. Therefore, the number of workers can be reduced by half. Furthermore, since it does not absorb water like rope, the total weight is about 1/4.

Since the monofilament cannot be processed with black resin, it is likely that the strength of the monofilament will be reduced by ultraviolet rays. However, the absorption of ultraviolet rays by the addition of carbon black hinders the breaking of intermolecular bonds and does not reduce the strength.

Further, since the monofilament has a satin finish on the yarn surface, the friction strength is also improved.

[0009]

[Examples] 6-66 nylon copolymer (85:15) resin was blended with carbon black so as to have the composition shown in Table 1 and spin-dried.
Stretching was performed approximately 5 times so as to obtain 3.5 mmφ.

[0010]

[Table 1]

An outdoor exposure test was conducted on the monofilaments obtained from the above No. 1 to 7 compositions to find out their residual strength.
I checked (%). The results are shown in Fig. 1. As is clear from this figure, it is preferable that the amount of carbon black added in the long line is in the range of 0.05 to 2.0% by weight. When the amount of carbon black added is less than 0.05% by weight, the residual strength is significantly reduced. In addition, it is not preferable to add it in excess of 2.0% by weight because it is excessively added.

Carbon black was added to a polyester resin (polyethylene terephthalate) so as to have the composition shown in Table 2, and spun-spun. This was stretched approximately 5 times to obtain a No. 300 (8.5 mmφ) polyester monofilament long line.

[0013]

[Table 2]

Also in this polyester monofilament, as shown in FIG. 2, the residual strength is similar to that in the case of nylon, and the addition amount of carbon black is in the range of 0.05 to 2.0% by weight. Is suitable for long lines.

[0015]

As described above, the monofilament long line of the present invention has a small overall volume, and has a low resistance and can be wound up quickly when the drum is wound up, and has good workability. There is no dirt attached like a rope. Furthermore,
Since it does not absorb water like rope, the total weight is extremely light.

The strength does not decrease even after long-term use, and the wear resistance during operation is better than that of ropes.

[Brief description of drawings]

FIG. 1 is a graph showing the results of a nylon monofilament outdoor exposure test.

FIG. 2 is a graph showing the results of a polyester monofilament outdoor exposure test.

Claims (3)

[Claims] 1. A long line comprising a large diameter synthetic resin monofilament to which carbon black is added. 2. The amount of carbon black added is 0.05 to 2.0.
The longline according to claim 1, which is in weight%. 3. The longline according to claim 1, wherein the synthetic resin monofilament is nylon or polyester monofilament, and the thickness thereof is at least 2.87 mmφ.