KR840000970B1 - A method of manufacturing braided cord twine or twisted ropes and of manufacturing a netting of said materials in particular a net destined for fishing purposes - Google Patents

Abstract

Manufacture of braided twines or twisted ropes comprises (a) forming ropes of heat-contractable filaments around cores contg. thermoplastic materials; (b) extending them; and (c) treating ropes at such a temp. that thermoplastic core materials are melted and the heat-contractable filaments are not melted, where the melted thermoplastic materials pass into the openings of filaments and block them up.

Description

Method of manufacturing a sealing rope consisting of occlusal or twisted filaments

1 is a partial state diagram of the occlusal cord according to the present invention.

2 is a state in which the core fibers are arranged in the center of the twine or rope strands.

3 is a partial state diagram of the structure of a twine or rope of a plurality of filament bundles with core yarns.

3a is a cross-sectional view of FIG.

4 is a state diagram of some tissues in a manufactured fishing net.

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention generally relates to a method for producing an occlusal cord, a twine or a twisted rope comprising sealing a gap between the primary filaments of the main material, wherein the bite in the main material is respectively thermoplastic. It is done around the core of the material, and thus the finished product relates to a process for producing the bite cord, twist or twisted rope, which has been softened or melted, respectively, of the thermoplastic core material.

Processes for the preparation of occlusal cords, twists or ropes are generally known and sealing of such products is done by applying a coating on its outer surface. US Pat. No. 2,284,728 discloses an example of using a core of thermoplastic material. After softening, the material penetrates into the gaps between the filaments or yarns by the pressure applied to the outer surface of the cord, twist or rope.

The coating has a defect that is locally peeled off due to abrasion or cracking. This delamination is undesirable not only in terms of the appearance of the cord, the twine or the rope, but also in terms of its properties, which adversely affects flexibility, strength and structural stability, thereby degrading the properties of the materials. This is because a path is formed in which dust, sand and other undesirable substances can penetrate.

In the case of using a thermoplastic core, the softened core material cannot be guaranteed to be uniformly distributed by the pressure applied to the outer surface of the cord or the like, and the binding with the core may be disturbed.

SUMMARY OF THE INVENTION The object of the present invention is to solve the problems as described above, and this object is achieved by the present invention characterized in that these materials are interlocked with each other such that the main materials are contracted and remain in tension.

If the cord, twist or rope with a thermoplastic core is kept in tension, its diameter becomes smaller. At the same time, when the core is softened or melted by the addition of softener or by heat treatment, respectively, due to the tension given to the core material, the periphery of the core becomes tight and penetrates into the gap between the fibers from the core material or the inside thereof. The result is a sealed structure that is not affected by wear and tear from the outer surface. The pressure of the main material against the core occurs over its full length.

The present invention relates, more particularly, to a process for the manufacture of meshes of interlocking cords, twisted yarns or twisted ropes made of shrinkable materials such as thermoplastic fibers, in which the meshes interconnect the cords to form reticulated mesh noses. After interlacing, the mesh is heat treated in a tensioned state to seal the gap between the filaments of the main material. For example, it is generally known to make nets of fishing nets and the like in this manner. Therefore, as the main material, a yarn known to have high wear and crack strength and high resistance, such as polyamide yarn, especially nylon-6 yarn, is used. It is suitable to occlude the cord in the hollow phase, which hollow cord is elastic and easy to interlock. The mesh made in this way may then be conventionally heat treated, but at the same time it may or may not be kept in tension to fix the deadlock and stabilize the material, which means that the material shrinks. In this way, a net is made which has a mesh of the same size everywhere and a well-fixed fixation.

When using a net such as fishing nets, there may be a problem that foreign matter such as sand adheres to an empty space of a cord forming a net, and this phenomenon is realized particularly when the net is used as a towing net. The grains of sand do not necessarily penetrate and fall from the coating or structure of the cord, thus causing the cord portion to expand, resulting in a variation in the width of the mesh as the length changes.

Moreover, the grains of sand that have entered the cord cause rapid wear of the cord, because the nets continue to move and the fibers and grains of the net continue to rub against each other.

As a means to solve this drawback, the method of covering this net | network with the film | membrane which sealed the gap | gap between fibers from the outside after manufacturing a net | net is known. A coloring agent can also be added to this film. However, such a coating can be worn because sand can penetrate, and the above-described problems exist. Moreover, the coating wears more quickly at the deadlocks forming the thicker portion, which results in a different color if the coating contains a colorant, which has an unfavorable effect on the catch. Some fish, such as tuna, cannot identify colors, but because they identify differences in color, nets that were originally invisible are visible to these fish, causing them to flee.

It is also an object of the present invention to provide a method for producing a net that does not have the drawbacks described above.

This purpose is to bind and form a mesh, using an occlusal cord, a twist or a rope with a core of thermoplastic material to cross-link to form a mesh, followed by treatment in a tensioned state to soften the core and The mesh is heat-treated in a tensioned state on all sides, which is achieved by the present invention characterized by heat-treating so that the thermoplastic material of the core penetrates into the gap between the filament and the seal from inside when the main material of the cord shrinks. .

Cords, twists, or ropes, each occluded around the core and not yet processed so that the core material has not penetrated the exterior, still retain the flexibility needed to make deadlocks with reticular meshes. After forming the network structure by interlacing, the mesh is heat treated to shrink the fiber and at the same time melt the core and keep the mesh in tension from all sides, the contraction increases the tension and the mesh part between the interlocks Becomes smaller diameter and thus tightly surrounds the core, so that the core penetrates to the outside, for example, through a gap between the filament and the thread of the bite. This shrinkage stress at the same time tightens the deadlocks more strongly, so that the core material will also penetrate outwardly from the deadlocks. In the structure thus obtained, wear and cracking are much less likely, and sand penetration is also prevented. When the core contains a colorant, a colored net is produced by the method described above, which does not cause color difference due to wear at the deadlock.

Shrinkage of the material and softening and melting of the core occur at the same time for other poorly sealed areas as the core material may still be in close contact with the deadlock.

The core consists of fibers that can withstand the temperatures and forces that occur during the manufacturing process.

In forming the film, it is suitable to use a kind of fiber similar to the core composed of a support that can withstand the temperature and pressure (force) applied during the heat treatment. It is suitable to use polyamide yarn or polyester yarn coated with a thermoplastic material such as a polymer based on polyethylene. Subsequently, the material that can be melted during the shrinkage treatment and penetrate into the gaps of the cord is supplemented and supplied by the thermoplastic material, and the internal yarn of the polyamide or polyester is loosened in its supporting function. This support is desirable to ensure that the molten core material does not tip to one side resulting in uneven sealing results.

In manufacturing the net, it is known to fix the deadlocks by heat treatment. According to the present invention, such heat treatment is suitably performed at a temperature equal to or higher than the shrinkage temperature of the main material of the cord. By doing so, the deadlock can be fixed only when the material at the deadlock is well tightened around the molten core material during the shrinkage action.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Referring to FIG. 1, there is shown an articulation strap 1 consisting of a flat filament bundle 2, which is made of, for example, polyamide, covered with a layer of thermoplastic material 4. It is occluded around the core which consists of the yarns 3.

At the end of the treatment according to the present invention, the coating layer 4 penetrates between the gaps between the fibers and the occlusal string, and the occlusal string adheres to become hard and hard. Further, the state in which the coating 4 is completely colored when the colorant is used is detailed in the drawings. Not shown.

In FIG. 2, an example of producing a twine from the core yarns 3, 4 and filaments 2 is shown.

3 shows three filament bundles or strands 10, 11, and 12 having core yarns 3, 4 and interlocked to form one row.

In FIG. 4, a mesh of meshes consisting of interlaced cords 5, 6 and 7 is shown, where the dead ends are indicated by numerals 8 and 9, respectively.

The melting temperature of the coating 4 and the shrinkage temperature of the filament 2 should coincide with each other. When using a mesh of mesh made of nylon-3 yarn made of nylon-3 yarn and surrounded by a film of a low molecular weight thermoplastic material, even if it is slightly changed with respect to the indicated temperature depending on the treatment time and the tension applied at the time of treatment. Good suitable temperatures are from 50 ° to 90 ° C.

Suitable temperatures for fixing the deadlock are likewise between 125 and 135 ° C. depending on the treatment time and the tension.

Heat treatment can be performed by a well-known method by infrared radiation, steam, hot air, boiling liquid, or high frequency.

Claims (1)

Form a rope consisting of occlusal or twisted heat-shrinkable filaments around the core containing the thermoplastic material, bring the rope into tension, melt the thermoplastic core material under tension, and melt the rope into heat-shrinkable filaments. The rope is treated to maintain a temperature sufficient to shrink without causing the filament to shrink less of the cross section of the rope while the rope is in tension, and the molten thermoplastic material penetrates into the opening between the filaments of the rope and the filament of the rope And a sealing rope composed of occlusal or twisted filaments.

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