JPS63251034A - Long line - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is suitable for longlining, that is, in the ocean, tuna, walleye cod,
Cotton-like materials (generally divided into main lines and branch lines) for fishing fish such as sea bream and fugu, and ropes and string ropes used in similar ways (hereinafter all of these will be simply abbreviated as long lines).
Regarding.

<Prior Art> Conventionally, long lines have been made by twisting together spun yarn using short fibers made of natural or synthetic fibers. This product is easy to handle due to its non-slip properties, and is easy to process the connecting parts (so-called satsuma processing, eye processing using metal fittings, etc.)
The longline has very good properties such as river alignment, bending fatigue resistance, and abrasion resistance, but the strength per unit weight (tensile strength and knot strength) is low, and if you try to use 1q of high strength longline, the entire longline will be heavy. It also has the problem of being thick and expensive.

In recent years, with the labor-saving and larger size of fishing boats, there has been a desire for stronger longlines, and in response to this demand, longlines made of synthetic fiber filament yarn have been commercialized, but these have improved strength per unit weight. However, the various performances mentioned above, such as handling properties, joint workability, texture, bending fatigue resistance, and abrasion resistance, are insufficient.

As a method of combining the advantages of both of the above, as shown in Fig. 5, a so-called wrap-twist method is adopted in which a core yarn made of synthetic fiber filament yarn is used as the core, and the core yarn is wrapped with side yarns made of spun yarn, as shown in Figure 5. Longline is also used, but although it has the same handling properties, joint workability, and texture as longline made only of spun yarn, it has sufficient bending fatigue resistance, abrasion resistance, and strength per unit weight. Not.

<Problems to be Solved by the Invention> As a result of intensive research in order to satisfy the various performances required of the above-mentioned longline, the present inventors have found that handling properties, joint workability,
We succeeded in obtaining a longline with extremely good river alignment, bending fatigue resistance, abrasion resistance, and strength per unit weight.

Means for Solving the Problems> The present invention provides a means for solving the problems of the above-mentioned long line made of spun yarn or filament yarn, and the wrapped long line using both filament yarn and spun yarn. The fiber bundle is characterized by the use of a so-called core yarn in which a high-strength fiber is used as a strong component, and a sheath of short fibers is formed around the fiber bundle.

The core yarn referred to here is composed of sheath fibers made of short fibers surrounding a core fiber bundle, and the single fibers that make up the sheath cover the other single fibers that make up the sheath without being substantially twisted. It is a core yarn, and the coverage rate (
%).

Coverage rate (%) ≧ Volume ratio of the sheath component in the core yarn × 1.2 (%) If the coverage rate does not satisfy the above formula, it is necessary to increase the volume ratio of the sheath fiber in order to obtain the same coverage rate. This results in a decrease in the strength of the core yarn.

As mentioned above, the core fiber bundle of the core yarn is a component that mainly shares strength, and high-strength fibers are used.
Among these, it is more preferable to use synthetic fiber filament yarn (thread made of long fibers).

The short fibers constituting the sheath of the core yarn are slivers or rovings with an average fiber length of 38 mm or more, which are used in ordinary spinning, but they can be made from so-called tow spinning (purlock system, converter one-way system) or worsted spinning. It is preferable to use a sliver or roving having an average fiber length of 70 to 300 m, and an average fiber length of 70 to 30 m.
It is more preferable to use short fibers of 0 mm as the sheath component because the sheath component is more difficult to handle than the core component, the processability in post-processing is greatly improved, and the fluff of the longline is extremely reduced.

If the volume ratio of the sheath component in the core yarn is less than 30%, the handleability, joint workability, texture, abrasion resistance, and bending fatigue resistance due to short fibers will not be sufficient, and the volume ratio will be 90% or less. % or more, the strength will be insufficient and this is not preferable. More preferably, the volume ratio is 45 to 80%.

The core fiber bundles that make up the core yarn include polyester fiber, nylon fiber, vinylon fiber, acrylic fiber,
Synthetic fibers such as polyolefin fibers, aramid fibers, and polyarylate fibers are used, and among them, polyester fibers, nylon fibers, and vinylon fibers are preferably used.

The short fibers constituting the sheath include synthetic fibers such as polyester fibers, vinylon fibers, nylon fibers, acrylic fibers, and polyolefin fibers, and natural fibers such as cotton and hemp, among which polyester fibers, vinylon fibers, and nylon fibers are preferred. used for.

The single fiber denier of the core fibers constituting the core yarn is 0.7 to 10 deniers, and the total denier of the fiber bundles constituting the core is 75 to 1000 deniers in terms of tensile stress dispersion and ease of manufacture. preferable. Further, the fibers used in the sheath portion preferably have a single fiber denier of 1 to 15 deniers.

In addition, in the core yarn used in the present invention, it is necessary that the single fibers constituting the sheath are not substantially twisted together with other single fibers constituting the sheath, and if the sheath fibers are heated, the single fibers will become integrated. When the sheath fibers become a yarn by themselves, they tend to separate from the core fibers, resulting in insufficient abrasion resistance. To explain this in detail,
Since the single fibers of the heated fiber bundle (yarn) are twisted, their movement is restricted (instead, they are immobile), so they intertwine with the core fibers and improve entanglement. Therefore, since the core fiber and the sheath fiber constitute yarns separately as the sheath fiber, the sheath fiber is easy to move. If the sheath fibers are not substantially twisted together, the single fibers constituting the sheath fibers will intertwine with the core fibers, resulting in improved entanglement and a yarn with less peeling. As a longline that is subjected to strong frictional forces, it is essential that there is little peeling. In other words, if the core component, which is a strong holding component, is exposed due to peeling, the core fiber is likely to be damaged, and it can be said that it is unsuitable for ropes.

A longline using the core yarn is manufactured by the following method.

i) Longline by wrapped-twisting method Figure 5 shows a cross-sectional view of the twisted yarn constituting the wrapped-twisted longline. The first longline according to the present invention uses the core yarn according to the present invention as the side yarn in place of the conventionally used spun yarn as shown in FIG. Created. The strength of wrapped-twisted longline using core yarn as the side yarn has been greatly improved compared to conventional wrapped-twisted longline using spun yarn, and the greatest advantage is that it fully satisfies recent demands for improved strength. It is a characteristic of Moreover, it is sufficient for abrasion resistance, bending fatigue resistance, handling property, joint workability, and texture if the sheath fiber volume ratio (%) of the core yarn used for the side yarn is 30% or more, and the volume ratio is 4.
It is more preferable that the core yarn is 5% or more.

Although the longline according to this method may use only the core yarn as the side yarn, it is also possible to use it in combination with other spun yarns or filament yarns. It is also possible to use one or more types of fibers in the core yarn, or to use a core yarn in combination.

ii) Non-wrapped longline The twisted yarn constituting the longline was composed of core yarn alone (
When the core yarn is used in the portion shown in FIG. 6 and FIG. 9), the strength is improved compared to the conventional wrap-twisted longline, but the bending fatigue resistance is greatly improved. The reason for this is that both wrapped and unwrapped longlines have large bundles of fibers (mainly filament yarns are used), which are the strength component, and when bent, the fibers are damaged due to abrasion between single fibers.・Strength decreases when using a wire, but in a longline that uses core yarn as a twisted yarn component, the core fiber bundles, which are the strength component, exist as small bundles uniformly dispersed throughout the rope, so interfiber wear is extremely reduced. It is thought that this is because of this.

Furthermore, the longline exhibits handling properties, joint workability, texture, and abrasion resistance equivalent to those of conventional wrapped and twisted longlines.

When making a non-wrapping type longline, the core yarn can be used alone, but it is also possible to use it in combination with a core yarn.

Further, even if the core yarn is used in the form of a braid, a longline having the above-mentioned properties can be obtained.

Next, the present invention will be explained with reference to the drawings.

Figure 1 shows the core yarn used in the present invention (coverage rate ~100
%) 1, 2 indicates a single fiber of the fibers constituting the core fiber bundle, and 3 indicates a single fiber of the fibers constituting the sheath.

Figure 2 shows the core yarn used in the present invention (coverage field 100
%) 1 always shows a state in which the surface of the core yarn 1 is covered with the sheath fibers 3.

FIG. 3 is a cross-sectional view of the longline 4, and FIG. 4 is a side view of the longline 4. In these figures, 5 indicates the strands constituting the longline 4.
6 indicates the twisted yarn constituting strand "5".

Figure 5 is a cross-sectional view of the twisted yarn of the wrapped longline, and 7 is the core yarn (
For example, polyester filament 1000d/192
f), 8 is side yarn (e.g. polyester spun yarn 5°5/
1) is shown.

FIG. 6 is a cross-sectional view of the unwrapped longline strands, with reference numeral 9 indicating the yarns constituting the strands (for example, polyester filament 1).
~1000d/192f, polyester spun yarn 5°S
/1 etc.).

The coverage of the core yarn is determined by the following method. Wrap the thread parallel to the panel, take a photo of the surface using a universal projector or microscope, place a piece of transparent paper on top of the photo, trace the outer circumference of the thread, and detail the exposed part of the core fiber. Fill in. Thereafter, a piece of paper is cut along the outer periphery of the yarn, its weight is measured, and the weight of the paper is measured. The coverage rate is: Coverage rate (%) = Wo Wl × 1o.

W.

It is determined by

However, the sample length of the core yarn to be traced is the length at which the twist of the yarn appears 100 times.

That is, Trial length (inch ＞= 100 Number of twists (t/in) It is necessary.

The volume ratio of the sheath fibers in the core yarn is the ratio of the volume of the sheath fibers to the volume of all the fibers constituting the core yarn of a certain length, and the volume can be calculated by dividing the weight by the density of each fiber. can get.

Example i) Preparation of Core Yarn A polyester tow with a single fiber denier of 4 dr (total denier 1 million dr) was cut using the Purlock method to obtain a sliver with an average short fiber length of 110#. After passing the sliver through a normal spinning process, it was fed to a ring spinning machine, and just before twisting, polyester filaments of 500d/96f to form a core fiber bundle were fed to form a core yarn with a sheath fiber volume ratio of 50% and a fineness of 1000dr. (Core yarn A). The core yarn had a coverage of 70%, a tenacity of 6.5 to 9, and an elongation of 14%.

Similarly, polyester filament 3 becomes the core fiber bundle.
Using 50d/48f, sheath fiber volume ratio 65%, fineness 1
000dr core yarn was created (core yarn B
). The core yarn has a coverage of 98% and a strength of 5.8K.
y, the elongation was 13%.

ii) Using the above core yarn A, core yarn B, polyester spun yarn, and polyester filament, the first
As shown in the table, longlines were made using the wrapping method and the non-wrapping method, and their performance was measured. The performance measurement results are shown in Table 1. The following margins are shown.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an example of the core yarn constituting the present invention, and FIG. 2 is a side view thereof. FIG. 3 is a sectional view of an example of the longline of the present invention, and FIG. 4 is a side view thereof. Figure 5 is a cross-sectional view of the twisted yarn of wrapped longline, Figure 6
The figure is a cross-sectional view of the unwrapped longline strands.

Claims (1)

[Claims] 1. A core fiber bundle is surrounded by sheath fibers made of short fibers,
A core yarn in which the single fibers constituting the sheath cover other single fibers constituting the sheath without being substantially twisted together, and the core yarn satisfies the coverage ratio (%) shown by the following formula. Longlines. Coverage rate (%) ≧ Volume ratio of sheath fibers in the core yarn (%) x 1.2 2. Claim 1, wherein the fibers constituting the core fiber bundle are synthetic fiber filament yarns (long fibers) longline. 3. Claim 1, wherein the fibers constituting the sheath are short fibers made of synthetic fibers having an average length of 70 to 300 mm.
The longline described in paragraph or paragraph 2. 4. The volume ratio of the sheath component to the core yarn is 30 to 9.
The longline according to any one of claims 1 to 3, which is 0%. 5. The volume ratio of the sheath component to the core yarn is 45 to 8.
The longline according to any one of claims 1 to 3, which is 0%.