WO2012026008A1

WO2012026008A1 - Stretch yarn having resistance to cutting, and textile products using stretch yarn

Info

Publication number: WO2012026008A1
Application number: PCT/JP2010/064408
Authority: WO
Inventors: 茂梅田
Original assignee: 株式会社梅信; 株式会社ヤギ
Priority date: 2010-08-25
Filing date: 2010-08-25
Publication date: 2012-03-01

Abstract

Provided is a stretch yarn containing glass fibers which has have excellent resistance to cutting and great elasticity, and is therefore suitable for manufacturing extremely flexible fabrics. Also provided are clothes and other textile products that are manufactured using such a stretch yarn. Also provided is a stretch yarn in which a cover layer having resistance to cutting is formed around an elastic core yarn by a cover yarn, said cover yarn, which is obtained by winding low elongation fibers around a core yarn that uses elastic fibers and a core yarn that uses glass fibers for the elastic fibers, is wrapped in the same direction as the direction in which the low elongation fibers are wound with respect to the glass fiber yarn. Polyurethane fibers make an ideal elastic core yarn. It is desirable for a low elongation fiber yarn to have less stretch than a glass fiber yarn, to have low elongation, and high strength, such as a high-density polyethylene fiber yarn.

Description

Stretch yarn with cut resistance and textile products using the yarn

TECHNICAL FIELD The present invention relates to a thread having cut resistance (property to be torn with a blade or the like) and stretchability, and a fiber product using the thread, and in particular, an elastic fiber such as glass fiber and polyurethane fiber. And a glove knitted with the yarn and other textiles.

For example, at work sites that use blades such as meat processing sites or disaster sites where glass fragments are scattered, textile products such as gloves, work clothes, and shin pads worn by workers are accidentally applied to the hands and body. In order to prevent cutting when hit, cutting resistance is required. In order to obtain a woven fabric or a knitted fabric having such cut resistance, a thread including a metal wire or glass fiber is used.

As a yarn including a metal wire, for example, Patent Document 1 discloses an insertion yarn formed by twisting another twisted yarn made of a plurality of stainless steel multifilament yarns around a twisted yarn made of a stainless steel multifilament yarn. Russell knitted fabrics including chain knitting yarns made of multifilament yarns of synthetic fibers or metal fibers are described.

In Patent Document 2, an aramid fiber yarn of about 200 denier is wound in one direction on a core yarn obtained by spinning a single yarn of about 133 to 531.6 denier on a 30 to 100 μ stainless single wire. A knitting yarn in which a first coating is formed, and a synthetic fiber yarn of about 80 to 120 denier is wound around the first coating in the reverse direction to form a second coating, and then a knitting yarn in which a resin coating is applied to the strong fiber, and the knitting yarn Work gloves knitted in are listed.

Patent Document 3 discloses that a polyurethane fiber is used as a core yarn, and a yarn excellent in stretchability and cut resistance manufactured by twisting or covering a yarn containing a stainless wire to the core yarn, and such a yarn. Gloves using yarn have been proposed.

On the other hand, as a yarn containing glass fiber, Patent Document 4 discloses a yarn obtained by wrapping a liquid crystal polymer fiber around a core yarn containing glass fiber, and a metal wire or glass fiber as a core made of synthetic fiber. Threads wound 2 to 12 times per inch (2.54 centimeters) (80 to 480 T / M in metric conversion) and gloves with cut resistance knitted with such yarns are shown Yes.

Patent Document 5 discloses a cutting resistance such as a hard composite yarn using a multifilament yarn of a hard fiber such as glass fiber as a core yarn and a multifilament yarn of a thermoplastic synthetic fiber as a wound yarn, or a high density polyethylene fiber. It has been shown that there is already a cutting-resistant yarn in which low-strength fiber filaments and glass fiber filaments having the same properties are made into a core yarn, and the low-stretch fiber filament is wound around the core yarn twice. Yes.

Further, in Patent Document 6, a first wire strand formed of stainless steel is wound around a glass fiber core strand in a first direction, and a non-metallic non-performance fiber cover strand is first wound around the first wire strand. Composite cut resistant yarns having glass fibers and wire components wound in a direction opposite to the direction have been proposed.

Japanese Patent Publication No. 2003-129360 Japanese Patent Publication No. 2000-192308 International Publication No. 2010/064647 Pamphlet Japanese Patent Publication No. Hei 6-1992928 Japanese Patent Publication No. 2001-164411 Japanese Patent Publication No. 2002-54042

As described above, as a yarn having cut resistance, a yarn containing a metal wire and a yarn containing glass fiber have been proposed. When a metal wire is used, a very thin wire is required for the use of clothing such as gloves. However, at present, such thin metal wires, particularly stainless steel wires, are scarcely supplied and are difficult to obtain in the market. On the other hand, glass fiber is easily available on the market and can be obtained at a lower cost than stainless wire. Glass fiber has a specific gravity that is about one-fourth that of metal wire, and has electrical insulation, making it more suitable for the production of protective clothing.

On the other hand, the conventionally proposed yarn with cut resistance containing glass fiber was not sufficiently flexible, particularly stretchable. For example, in order to produce a woven or knitted fabric having a flexible flexibility that can follow a delicate movement of a fingertip, such as a finger part of a glove, the elasticity as a thread has not been sufficient.

In view of the above problems, the present invention is a yarn that has been provided with cut resistance by glass fiber, and has a large stretchability, and therefore can produce a fabric (woven fabric and knitted fabric) that is extremely flexible. It is another object of the present invention to provide clothing and other textile products that are knitted with such yarn and have excellent cut resistance.

In the present invention, an elastic fiber yarn having a large elongation rate (elongation) is used as a core yarn U, and a primary processed yarn 2 in which a yarn H of a low elongation fiber is wound around a core yarn G of glass fiber around the core yarn U. By providing a stretchable yarn (secondary processed yarn) 1 (1a to 1e) wound in the same direction as the winding direction of the yarn H of the low elongation fiber in the primary processed yarn (2a, 2b) The above-mentioned problems are solved.

The elastic core yarn U is most suitably a monofilament or multifilament of polyurethane fiber having an elongation of 1.5 to 5 (150 to 500%), more preferably 1.5 to 4, but natural rubber or synthetic rubber. The rubber thread can be used. Moreover, in order to restrict | limit elongation, the fiber with another small elongation can be included in parallel. The yarn H of the low elongation fiber wound around the primary processed yarn 2 is a yarn having at least a smaller elongation than the core yarn G of glass fiber, and is preferably a yarn of low elongation and high strength fiber. Examples of such fibers include high-density polyethylene fibers such as Dyneema and Tonouga (both are registered trademarks) manufactured by Toyobo. It should be noted that the general standard for synthetic fibers is that the high strength yarn has a tensile strength of 7 g / denier or more. The low elongation yarn is a yarn having an elongation of 10% or less.

It is important that the yarn H wound around the glass fiber core yarn G in the primary processing has a lower elongation than a high strength. Whether the elongation is low should be evaluated by comparison with the core glass fiber, and if the elongation is larger than the glass fiber, when the tension is applied, the tension acts on the glass fiber and the glass fiber breaks Will occur. That is, the low-stretch fiber yarn H covers the glass fiber to prevent the glass fiber from breaking when a sharp bend acts on the primary processed yarn 2, and the primary processed yarn 2 is tensioned. Sometimes, the low-stretch fiber yarn H is stretched to the limit and takes tension, and the glass fiber yarn G protects the glass fiber by the action that the remaining force for elongation remains.

For reasons described later, the number of turns of the low-stretch fiber yarn H with respect to the glass fiber core yarn G during primary processing is 100 to 500 T / M, and the primary core with respect to the elastic core yarn U covered in the stretched state during secondary processing. The number of turns of the processed yarn 2 is suitably 100 to 500 T / M. Moreover, the winding direction of the yarn H of the low elongation fiber around the core yarn and the winding direction of the primary processed yarn 2 are the same direction. That is, if the winding direction of the low-elongation fiber yarn H with respect to the core yarn G of the glass fiber during primary processing is S, the winding direction of the primary processing yarn 2 with respect to the elastic core yarn U during secondary processing is also S. Similarly, if the winding direction of the yarn H of the low elongation fiber at the time of primary processing is Z, the winding direction of the primary processing yarn 2 at the time of secondary processing is also set to Z.

When a cover yarn containing glass fiber is wound (covering) using an elastic yarn as a core yarn, the elongation is very small as a characteristic of the glass fiber, so it cannot follow the elongation of the elastic yarn that becomes the core yarn. There is a problem that the glass fiber breaks due to slight expansion and contraction. In order to eliminate this, it is necessary to increase the number of windings of the cover yarn when the cover yarn 2 containing glass fiber in the elastic core yarn U is covered. Thereby, the elongation rate transmitted to the cover yarn 2 when the elastic core yarn U is extended becomes small, and the cover yarn 2 can follow the elongation of the elastic core yarn U with a margin.

However, the inventors of the present invention have found that the following problems occur when the number of turns of the low-elongation fiber yarn H is increased with respect to the glass fiber core yarn G.

That is, regarding the winding direction, if the winding direction of the yarn H of the low elongation fiber during the primary processing is opposite to the winding direction of the primary processing yarn 2 during the secondary processing, the cover yarn H of the primary processing yarn 2 is two. The glass fiber is unwound at the time of the next processing to expose the core glass fiber, causing a problem in protection of the glass fiber, and the glass fiber is easily cut. For this reason, the winding direction of the cover yarn must be the same during the primary processing and the secondary processing.

On the other hand, in the primary processing, in order to better coat the core fiber G of glass fiber, the number of windings of the low-stretch fiber yarn H must be increased. In the secondary processing, the number of turns of the primary processing yarn 2 with respect to the elastic core yarn U must be increased so that the glass fiber can follow the elongation of the elastic core yarn U. If the winding direction of the cover yarn is the same during the primary processing and the secondary processing, the yarn H of the low elongation fiber is additionally twisted during the secondary processing, and the number of turns of the yarn H of the low elongation fiber relative to the elastic core yarn U is When it becomes excessive, a large torque remains in the obtained stretchable yarn 1, and weaving and knitting become impossible.

The present invention overcomes the above-mentioned conflicting conditions, which have not been recognized in the past, and is practical and high in glass fiber-containing yarn with cut resistance and elasticity for producing woven fabrics and knitted products. Was completed.

General purpose fibers can be added to the primary processed yarn 2 and the cover yarn of the secondary processed yarn 1 that is a product to impart a dyeing property, a texture or a touch when used as a woven fabric or a knitted fabric. Here, general-purpose fibers are general synthetic fibers, man-made fibers, and natural fibers. However, if you want to give special characteristics to the yarns or fiber products that you produce, uncommon fibers with such characteristics. Is also included in the general-purpose fiber mentioned here.

The stretch yarn of the present invention can be used for fabrics of all textile products that require cut resistance, and is particularly suitable as a yarn for manufacturing work gloves that require great flexibility at the finger portion.

By using a monofilament or a multifilament of polyurethane fiber as the core yarn U and winding the primary processed

yarns

2a and 2b covering the core yarn G of the glass fiber with the yarn H of the low elongation fiber, the core yarn U is extremely stretchable. And the thread | yarn provided with the high cut resistance by the glass fiber around a core thread | yarn can be obtained.

According to this invention, it is possible to obtain a yarn having a large stretchability that cannot be achieved by a conventional glass fiber-containing yarn. Therefore, by using the yarn of the present invention as the yarn of the fabric, it is possible to obtain a fabric that is very flexible and has little bending resistance and has cut resistance by containing glass fiber. Therefore, the stretch yarn of the present invention is used for clothing and other safety / safety items such as gloves, socks, underwear, waistcoat, knee pads and elbow pads worn at metal processing sites, food processing sites, construction sites, etc. It is most suitable as a yarn used to manufacture textile products.

The schematic diagram which shows the elastic yarn of 1st Example in the state which unfolded the cover yarn partially (rewinded) The same figure as FIG. 1 of the elastic yarn of 2nd Example The same figure as FIG. 1 of the elastic yarn of 3rd Example The same figure as FIG. 1 of the elastic yarn of 4th Example The same figure as FIG. 1 of the elastic yarn of 5th Example Top view showing working gloves

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 to FIG. 5 are schematic views showing the first to fifth embodiments of the stretchable yarn according to the present invention, with its cover yarn (covered yarn, wound yarn) partially rewound. 1 to 5, 1 (1a to 1e) is a stretchable yarn having cut resistance according to the present invention, 2 (2a to 2c) is a primary processed yarn, U is an elastic yarn, G is a glass fiber yarn, H is a yarn of low elongation fiber, and E is a yarn of general-purpose fiber.

In the stretchable yarn 1a of the first embodiment shown in FIG. 1, a primary processed yarn 2a is wound around a core yarn U made of an elastic yarn. The wound primary processed yarn 2a forms a coating layer having cut resistance around the elastic core yarn U. The primary processed yarn 2a is formed by winding a low elongation fiber yarn H around a glass fiber core yarn G to form a first covering layer (lower sheath), and a general-purpose fiber around the first covering layer. The yarn E is formed by winding the yarn E to form a second covering layer (upper sheath). The low-elongation fiber yarn H and the general-purpose fiber yarn E of the primary processed yarn 2a are wound around the glass fiber core yarn G in opposite directions.

The stretchable yarn 1a of the first embodiment is a layer in which the outer layer of the coating layer is wound with a yarn E of general-purpose fibers while imparting cut resistance with a coating layer containing glass fibers and low elongation fibers. Therefore, as the yarn E of the general-purpose fiber, by using a yarn having dyeability, texture, touch, etc. according to the use of the stretch yarn 1a, the fiber product woven or knitted with the stretch yarn 1a. A yarn having surface characteristics (characteristics such as dyeability, texture, and touch) according to the application can be obtained.

The stretchable yarn 1b of the second embodiment shown in FIG. 2 has a structure in which a second covering layer is formed by winding a general-purpose fiber yarn E2 around the stretchable yarn 1a of the first embodiment. The general-purpose fiber thread E2 and the primary processed thread 2a are wound around the elastic fiber core thread U in opposite directions.

That is, in the elastic yarn 1b of the second embodiment, the primary processed yarn 2a is wound around the elastic core yarn U to form a covering layer having cut resistance, and further, a general-purpose fiber yarn E2 is wound around the outer layer. This is a yarn formed by turning to form a second coating layer. In the same manner as in the first embodiment, the primary processed yarn 2a is formed by winding a low-stretch fiber yarn H around a glass fiber core yarn G to form a first coating layer, and the outside of the first coating layer. A yarn in which a second covering layer is formed by winding a yarn E of a general-purpose fiber around.

In the stretchable yarn 1b of the second embodiment, the yarn E2 of the general-purpose fiber is further wound around the stretchable yarn 1a of the first embodiment, so that the stretchable yarn 1b is stretched with the yarn E wound around the outermost of the primary processed yarn. By selecting the yarn E2 wound around the outermost side of the yarn 1b from among many known yarns, the obtained stretchable yarn 1b has more preferable surface characteristics than the stretchable yarn 1a of the first embodiment. Can do.

The elastic yarn 1c of the third embodiment shown in FIG. 3 is wound around the glass fiber yarn G before winding the primary processed yarn 2a used in the first embodiment and the second embodiment around the elastic core yarn U. The other primary processed yarn 2b around which the yarn H of low elongation fiber is wound is wound in a direction opposite to the winding direction of the primary processed yarn 2a around the elastic core yarn U. Accordingly, in the primary processed

yarns

2a and 2b, the winding directions of the low elongation fiber yarn H with respect to the glass fiber core yarn G are opposite to each other.

That is, in the stretchable yarn 1b of the third embodiment, the other primary processed yarn 2b is wound around the elastic core yarn U, and the primary processed yarn 2a similar to that used in the first and second embodiments is wound further outside. This is a yarn in which a coating layer having two layers of cut resistance is formed by turning. Similar to the first embodiment, the primary processed yarn 2a is a yarn obtained by winding a low-stretch fiber yarn H and a general-purpose fiber yarn E in opposite directions around a glass fiber core yarn G. The other primary processed yarn 2b is a yarn in which a single-layer coating layer is formed by winding a yarn H of low elongation fiber around a core yarn G of glass fiber.

In the stretchable yarn 1c of the third embodiment, the processed

yarns

2b and 2a obtained by winding the yarn H of the low elongation fiber around the core yarn G of the glass fiber are wound in two layers. Compared to the stretch yarn of the second embodiment, it has higher cut resistance and has the same surface characteristics as the stretch yarn 1a of the first embodiment.

4 is a yarn having the simplest structure of the stretchable yarn according to the present invention. The elastic yarn 1d of the fourth embodiment has a structure in which only the other primary processed yarn 2b described in the third embodiment is wound around the elastic core yarn U. That is, the elastic yarn 1d of the fourth embodiment is formed by winding a yarn 2b obtained by winding a low-elongation fiber yarn H around a glass fiber core yarn G around an elastic core yarn U to form a coating layer. It is a formed thread.

The elastic yarn 1d of the fourth embodiment has flexibility and cut resistance, but the surface characteristics depend on that of the low elongation fiber yarn H used for the production of the primary processed yarn 1b. May have incompatible or insufficient surface properties.

The stretchable yarn 1e of the fifth embodiment shown in FIG. 5 is a yarn that has solved the above-mentioned problems of the stretchable yarn 1d of the fourth embodiment. A general-purpose fiber yarn E2 is provided around the stretchable yarn 1d of the fourth embodiment. A coating layer for improving the surface properties of the resulting stretchable yarn is formed by winding the elastic core yarn U in a direction opposite to the winding direction of the other primary processed yarn 2b.

The elastic core yarn U in the first to fifth embodiments is a polyurethane monofilament or multifilament. As described above, the elastic core yarn U can include, in addition to the elastic fiber yarn, a fiber that does not have elasticity for limiting elongation. The yarns H of low elongation fibers in the first to fifth embodiments are high density polyethylene fiber yarns.

The preferable range of the thickness of the yarn and the number of windings of the cover yarn are the primary processed

yarns

2a and 2b, the core yarn G of the glass fiber is 50 to 400 denier, more preferably 200 to 400 denier, and the low elongation to be wound around this. The yarn H of the fiber is 100 to 800 denier and the number of windings is 100 to 500 T / M (the number of windings per 1 m of the core yarn). The cover yarn E of the general-purpose fiber is, for example, 50 to 400 denier of the yarn of polyester fiber, the number of windings Is 100 to 500 T / M.

As the yarn for producing the stretchable yarns 1a to 1e, the yarn U of polyurethane fiber used as the elastic core yarn is suitably 40 to 280 denier and 1.5 to 4 in elongation. The number of turns of the primary processed yarn wound around the elastic core yarn U is 100 to 500 T / M, and the yarn E of the general-purpose fiber is, for example, 50 to 400 denier in the case of polyester, and the number of turns is 100 to 500 T / M. The elastic core yarn U winds the cover yarn in the maximum extended state. The number of turns of the cover yarn is the number of turns per 1 m of the elastic core yarn in the maximum extension state.

The elastic yarns 1a to 1e of the embodiment are manufactured in two steps: a first step of manufacturing the primary processed yarns 2a to 2c and a second step of winding the obtained primary processed yarn around the elastic core yarn U. . That is, in the first step, a low-stretch fiber yarn H or a low-stretch fiber yarn H and a general-purpose fiber yarn E are wound around a glass fiber core yarn G using a known covering machine. First, the

yarn

2b or 2a is manufactured, and in the second step, the primary processed yarns 2a to 2c or the primary processed yarns 2a to 2c and the general-purpose fiber yarn E are formed around the elastic fiber core yarn U using a known covering machine. Manufactured by winding.

The stretch yarns 1a to 1e of the present invention obtained as described above are made into knitted products for woven fabrics or clothing by a loom or knitting machine. FIG. 6 shows a glove as an example of a knitted product, which is knitted by a glove knitting machine using any one of the stretch yarns 1a to 1e.

A glove knitted with the stretch yarn of the present invention in which elastic fiber is used as a core yarn and a cover yarn containing glass fiber is wound around the elastic yarn to provide cut resistance is a conventional metal wire-containing yarn or a conventional glass fiber-containing yarn. Compared to gloves knitted with, it has the same cut resistance and much better flexibility, can follow the movement of fine fingers, and can greatly improve workability and wearing feeling .

1 (1a to 1e) Stretch yarn of this invention 2 (2a to 2c) Primary processed yarn E General-purpose fiber yarn G Glass fiber core yarn H Low-elongation fiber yarn U Elastic fiber core yarn

Claims

An elastic fiber having an elongation of 150 to 500% is used as a core yarn, and a glass fiber is used as the core yarn in the elastic core yarn, and a low-elongation fiber is surrounded by 100 to 500 times per 1 m of the glass fiber core yarn. Per 1 m of the elastic core yarn in a state where a tensile force is applied to the elastic core yarn in the same direction as the winding direction of the low elongation fiber yarn with respect to the glass fiber yarn. Stretching with cut resistance, characterized in that a cover layer having cut resistance is formed around the elastic core yarn by the cover yarn being wound at a winding number of 100 to 500. yarn.
The cover yarn has a glass fiber monofilament or multifilament as a core yarn, and two types of yarns of first and second are wound around the core yarn with the winding directions opposite to each other, The stretchable yarn according to claim 1, wherein one of the two types of yarn is a yarn of the low elongation fiber.
The two cover yarns are wound around the elastic core yarn with their winding directions opposite to each other to form a two-layer covering layer having cut resistance. Item 1. The stretchable yarn according to item 1.
A textile product woven or knitted using the stretch yarn according to claim 1, 2 or 3.