JPH082228B2 - Long line - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a longline, that is, a rope for fishing for fish such as tuna, swordfish, sea bream, and swine in the ocean (generally divided into trunk ropes and branch ropes). And ropes and strings used by similar usage (hereinafter, abbreviated as "long line" including all of these).

<Prior Art> A long rope has conventionally been formed by twisting spun yarns using short fibers made of natural or synthetic fibers. This product is extremely good in handling property due to its non-slip property, workability of the connecting part (so-called "Satsuma process", "eye process using metal fittings" etc.) texture, bending fatigue resistance, wear resistance, etc., but per unit weight Had a problem that the strength (tensile strength and knot strength) was low, and if an attempt was made to obtain high strength, the entire longline would be heavy and thick, resulting in a high price.

With the recent labor saving and larger size of fishing boats, it has been desired to improve the strength of long lines, and in response, long lines made of synthetic fiber filament yarn have been commercialized, but this has improved strength per unit weight. However, the above-mentioned various properties such as handling property, workability of connecting portion, texture, bending fatigue resistance, wear resistance and the like are insufficient.

As a method for providing the advantages of both of the above, as shown in FIG. 5, a so-called twisted long rope in which a twisted yarn structure is used in which a core yarn made of synthetic fiber filament yarn is used in a core portion and the surrounding is wrapped with side yarns made of spun yarn. Although it is also used, this one has the same handleability as a long line consisting of spun yarn only,
Although it shows workability and texture of the connecting part, flex fatigue resistance, wear resistance, and strength per unit weight are not sufficient.

<Problems to be Solved by the Invention> As a result of earnest research to satisfy various performances required for the above long rope, the present inventors have found that handling property, workability of connecting part, texture, bending fatigue resistance, and abrasion resistance. And, it has succeeded in obtaining a long line having a very good strength per unit weight.

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

The core yarn mentioned here is a core yarn in which a core fiber bundle is composed of sheath fibers composed of short fibers, and a single fiber constituting the sheath covers the other single fibers constituting the sheath without being substantially twisted with each other. And satisfies the coverage (%) shown by the following formula.

Coverage (%) ≧ occupied in core yarn × 1.2 Volume ratio of sheath component (%) If the coverage 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. It becomes here as strength decreases.

As described above, the core fiber bundle of the core yarn is a component that mainly contributes to strength, and high-strength fibers are used. Among them, it is more preferable to use synthetic fiber filament yarns (threads made of long fibers).

The sliver or roving having an average fiber length of 38 mm or more, which is used in ordinary spinning, is used as the short fibers constituting the sheath of the core yarn, but the so-called tow spinning (Perlock method,
It is preferable to use a sliver or roving having an average fiber length of 70 to 300 mm composed of a converter system) or worsted fiber, and if short fibers having an average fiber length of 70 to 300 mm are used as the sheath component, the sheath component is the core. It becomes harder to come off than the components, and the process passability in post-processing is greatly improved,
Furthermore, it is more preferable because the fuzz of the long line is extremely reduced.

If the volume ratio of the sheath component in the core yarn is 30% or less, the handling property due to the short fibers, the processability of the connecting portion, the texture, the wear resistance, the bending fatigue resistance are not sufficient, and the volume ratio is 90%. % Is not preferable because the strength is insufficient. More preferably, the volume ratio is 45 to 80%.

As the core fiber bundle constituting the core yarn, synthetic fibers such as polyester fiber, nylon fiber, vinylon fiber, acrylic fiber, polyolefin fiber, aramid fiber, polyarylate fiber are used, among which polyester fiber, nylon fiber, vinylon fiber are preferable. Used for.

As the short fibers constituting the sheath, polyester fibers, vinylon fibers, nylon fibers, synthetic fibers such as acrylic fibers and polyolefin fibers, and natural fibers such as cotton and hemp are used. Among them, polyester fibers, vinylon fibers and nylon fibers are preferable. Used for.

The monofilament denier of the core fiber constituting the core yarn is preferably 0.7 to 10 denier, and the total denier of the fiber bundle constituting the core is preferably 75 to 1000 denier in terms of tensile stress dispersibility and ease of production. The fibers used for the sheath preferably have a single fiber denier of 1 to 15 denier.

In the core yarn used in the present invention, it is necessary that the monofilaments constituting the sheath are not substantially twisted with other monofilaments constituting the sheath, and if the sheath fibers are twisted, the monofilaments are In the case where the sheath fibers are integrally formed into a yarn, the yarn is easily separated from the core fiber, resulting in insufficient abrasion resistance. To explain this in detail, the twisted fiber bundles (such as yarns) are restricted in movement by twisting (they are rather immovable), and thus intertwine with the core fibers. Therefore, since the entanglement property is not improved, the core fiber is the core fiber, and the sheath fiber is the sheath fiber separately. Therefore, the sheath fiber is easy to move. If the sheath fibers are not substantially twisted together, the single fibers constituting the sheath fibers are intermingled with the core fibers to improve the entanglement and can be a yarn with less peeling. It is indispensable that the long line that receives the frictional force is less peeled. That is, it can be said that if the core component, which is a strong holding component, is exposed by peeling, the core fiber is easily damaged and is not suitable for ropes.

A long line using the core yarn is manufactured by the following method.

i) Stranding by the wrapping method Fig. 5 shows a cross-sectional view of the twisted yarn constituting the wrapping and twisting rope.
The first long line according to the present invention uses the core yarn according to the present invention in place of the spun yarn conventionally used as the side yarn shown in FIG. 5 and the core yarn uses the same material as that conventionally used. Created. The twisted yarn using the core yarn as the side yarn is significantly improved in strength as compared with the conventional twisted yarn using the spun yarn, and it is the most satisfying requirement for strength improvement in recent years. Is a feature of. Moreover, abrasion resistance, bending fatigue resistance, handling property, workability of connecting portion, and texture are sufficient if the sheath fiber volume ratio (%) of the core yarn used for the side yarn is 30% or more, and the volume ratio is 45%.
More preferably, the core yarn is not less than%.

The long line according to this method may use only the core yarn as the side yarn, but may also be used in combination with other spun yarn or filament yarn. It is also possible to use one or more kinds of fibers for the core yarn and to use a core yarn in combination.

ii) Long line by non-wrapping method When the twisted yarn forming the long line is composed of the core yarn alone (the core yarn is used in the portion shown in FIG. 6),
The strength is improved as compared with the conventional wrapping and twisting rope, but the bending fatigue resistance is greatly improved. The reason for this is that both the twisted and untwisted long ropes have a large bundle of fibers (mainly filament yarns) that are the strength component, and when they are bent, the fibers are damaged by abrasion between the single fibers. However, it is thought that inter-fiber wear is extremely reduced because the core fiber bundle, which is the strength component, is evenly distributed throughout the whole in the longline that uses the core yarn as the twisting yarn component. To be Further, the longline shows the same performance as that of the conventional wrapping longline in handling property, workability of connecting part, texture and abrasion resistance.

In the case of a non-wrapping type long line, the core yarn can be used alone, but can also be mixed with fibers of other forms.

Further, even when the core yarn is used in the form of a braid, a long line having the above-mentioned various properties can be obtained.

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

FIG. 1 shows the core yarn used in the present invention (coverage ≈ 100
%) 1 is a model representation of a cross section, 2 is a monofilament of fibers constituting a core fiber bundle, and 3 is a monofilament of fibers constituting a sheath.

FIG. 2 shows the core yarn used in the present invention (coverage ≈ 100
%) 1 is a side view showing the state in which the surface of the core yarn 1 is covered with the sheath fiber 3.

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

FIG. 5 is a diagram of strands of Tsutsumiyo longline, 7 core yarn (e.g. polyester filament 1000d / 192f), 8 denotes a side yarn (e.g. polyester yarn 5 ^'S / 1).

Figure 6 is a sectional view of the strands of Hitsutsumiyo longline, 9 denotes a yarn (e.g. polyester filament 1000d / 192f, polyester spun yarn 5 ^'S / 1, etc.) that make up the yarn.

The coverage of the core yarn is obtained by the following method. Wrap the thread parallel to the panel, take a surface photograph with a universal projector or microscope, put transparent paper on the photograph and trace the outer circumference of the thread, and the exposed part of the core fiber in detail Fill in. After that, cut the paper along the outer circumference of the yarn and measure its weight to be Wo, and then cut out the part where the core fiber is exposed and measure its weight to be W1. The coverage is Required by.

However, the trial of the core yarn to be traced is that the twist of the yarn
The length that appears 100 times.

That is Is.

The volume ratio of the sheath fiber in the core yarn is
It is the ratio of the volume of the sheath fiber to the volume of all the fibers constituting the core yarn of a fixed length, and the volume is obtained by dividing the weight by the respective densities.

Example i) Preparation of Core Yarn Polyester tow having a monofilament denier of 4 dr (total denier of 1 million dr) was cut by a Parlock method,
A sliver having an average fiber length of short fibers of 110 mm was obtained. After passing the sliver through a normal spinning process, the sliver is supplied to a ring spinning machine, and polyester filaments 500d / 96f to be a core fiber bundle are supplied immediately before twisting, and a sheath fiber volume ratio of 50.
%, A core yarn having a fineness of 1000 dr was produced (core yarn A). The core yarn has a coverage of 70% and a strength of 6.5K.
g, elongation was 14%.

Similarly, a polyester filament that becomes a core fiber bundle
A core yarn having a sheath fiber volume ratio of 65% and a fineness of 1000 dr was prepared using 350d / 48f (core yarn B). The core yarn had a coverage of 98%, a tenacity of 5.6 kg, and an elongation of 13%.

ii) Using the above core yarn A, core yarn B, polyester spun yarn, and polyester filament, the first
As shown in the table, a long line was prepared by a twisting method and a non-twisting method, and its performance was measured. The performance measurement results are shown in Table 1.

[Brief description of drawings]

FIG. 1 is a sectional view of an example of a 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 long line of the present invention, and FIG. 4 is a side view thereof. FIG. 5 is a sectional view of a twisted yarn of a wrapping and twisting rope, and FIG. 6 is a sectional view of a twisted yarn of a non-wrapping and twisting rope.

Claims (5)

[Claims] 1. A core yarn in which a core fiber bundle is composed of sheath fibers composed of short fibers, and a single fiber constituting the sheath covers the other single fibers constituting the sheath without being substantially twisted together. Therefore, a longline made of a core yarn satisfying the coverage (%) represented by the following formula. Coverage (%) ≧ occupied in core yarn × 1.2 Volume ratio of sheath fiber (%) 2. The longline according to claim 1, wherein the fibers constituting the core fiber bundle are synthetic fiber filament yarns (long fibers). 3. The long line according to claim 1 or 2, wherein the fiber constituting the sheath is a short fiber made of synthetic fiber having an average length of 70 to 300 mm. 4. The volume ratio of the sheath component in the core yarn is
The longline according to any one of claims 1 to 3, which is 30 to 90%. 5. The volume ratio of the sheath component in the core yarn is
The longline according to any one of claims 1 to 3, which is 45 to 80%.