JPH06158473A - Fabric capable of magnetic recording - Google Patents

Abstract

PURPOSE:To provide new fabric processable similarly to the case for conventional fabrics, and capable of recording any pattern with a combination of magnetic N/S characteristics. CONSTITUTION:The objective fabric containing one kind of constituent yarns, magnetic filament yarns composed of synthetic fibers containing magnetic particles of ferrimagnetic material and ferromagnetic material >=50 oersted in coercive force, and characterized by capable of recording any pattern with a combination of magnetic N/S characteristics.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel cloth capable of recording an arbitrary magnetic pattern having a combination of magnetic N / S characteristics.

[0002]

2. Description of the Related Art Automatic recognition technology that uses identification marks such as bar codes, OCR, and magnetic recording allows the sales management in the distribution industry and the production management in various manufacturing industries by directly marking the marks on the product. It is widely used in various fields such as labor saving in the manufacturing process. In the manufacturing process of textile products such as cloth and clothing, forms with marks are sometimes used by integrated management with products, but the release of objects and information often occurs due to dissipation. Therefore, there is an increasing demand for directly recording the mark on the product. However, it is difficult to obtain a printing surface that is rich in smoothness on the fabric side compared to paper and film, and it is difficult to print symbols such as barcodes and OCR. Also, even if printing is possible, reading errors often occur due to expansion and contraction of the fabric. That the printing becomes unclear due to chemical treatment such as alkali, heat or mechanical treatment during the fabric processing process, and the magnetic recording medium such as a magnetic card is not peeled or damaged by the fabric processing process. At present, there is no established technique for giving an identification mark to a fabric, such as the difficulty of attaching it to the fabric.

[0003]

DISCLOSURE OF THE INVENTION The object of the present invention is to provide a novel fabric which can be processed in the same manner as a normal fabric and can record and read an arbitrary pattern in which magnetic N / S characteristics are combined. Especially.

[0004]

That is, according to the present invention, a magnetic synthetic pattern yarn containing magnetic particles is used as a component yarn of a fabric, and an arbitrary magnetic pattern is recorded by combining magnetic N / S characteristics. It is a magnetically recordable cloth characterized by being capable of

[0005]

In the cloth of the present invention, magnetic fibers containing magnetic particles are mixed as a magnetic recording medium, and the magnetic fibers are magnetically N
By recording a pattern in which the / S characteristic is combined, it is possible to identify the cloth. The magnetic fiber is a magnetic composite fiber composed of a fiber composed of a fiber-forming polymer in which magnetic particles are uniformly dispersed and a magnetic component composed of a thermoplastic polymer in which magnetic particles are uniformly dispersed and a protective component composed of a fiber-forming polymer. preferable.

As the magnetic particles to be mixed in the fiber, any magnetic particles having a coercive force of usually 50 Oersted or more, preferably 100 Oersted or more, and most preferably 200 Oersted or more can be used. Such magnetic particles include γ-iron oxide, cobalt-containing γ-iron oxide, chromium oxide, iron-cobalt-nickel alloy particles,
Particles conventionally used as magnetic recording materials such as barium ferrite, and other magnetic materials exhibiting ferrimagnetism and ferromagnetism, such as metal particles containing iron, cobalt and nickel as main components, and composite metal containing iron oxide as the main component. Oxide particles, intermetallic compounds of rare earth elements such as samarium and yttrium with 3d transition elements such as cobalt and nickel, and rare earth elements such as neodymium / iron / boron and praseodymium / iron / boron and intermetallics consisting of iron and boron There are compound particles and the like. When the coercive force is 50 oersted or less, the recorded magnetism may be demagnetized or lost, which is not preferable. The particle size of the particles is usually 1
0 μm or less, preferably 5 μm or less, most preferably 2
The optimum value is less than μm. When it is 10 μm or more, it is difficult to form fibers, which is not preferable.

In the present invention, the matrix polymer of the magnetic component of the magnetic composite fiber can be kneaded with magnetic particles such as polyamide, polyester, polyolefin, polyvinyl, polyether, polyacrylonitrile, polyurethane and polycarbonate, and can be composite-spun. Any polymer can then be used. The mixing ratio of the magnetic particles in the magnetic component varies depending on the particle size and magnetic characteristics of the magnetic particles used and the properties of the matrix polymer, but is usually 10 to 95% by weight, particularly preferably 20 to 90% by weight.

In the present invention, as the fiber-forming polymer, polyamide, polyester, polyolefin, polyvinyl-based, polyether, polyacrylonitrile-based,
And, any known spinning materials such as modified polymers thereof can be used. Further, the polymer includes titanium oxide,
It is also possible to add known additives such as matting agents such as zinc oxide, heat stabilizers, ultraviolet absorbers, flow improvers and colorants. The mixing ratio of the magnetic particles in the magnetic fiber in which the magnetic particles are uniformly mixed is usually 10 to 90% by weight, particularly 20 to 90% by weight, though it varies depending on the particle size and magnetic characteristics of the magnetic particles used and the properties of the fiber-forming polymer to be mixed. A range of 80% by weight is preferred.

The cross-sectional shape (outline) of the magnetic fiber may be circular or non-circular and is not particularly limited. Also, the composite structure of the magnetic composite fiber is not particularly limited. 1 and 2 are examples of suitable composite structures. FIG. 1 shows a core-sheath type in which a magnetic component is a core portion and a fiber-forming protective component is a sheath portion, and FIG. 2 shows a magnetic component exposed on the fiber surface. It is a type. In addition, it can be arbitrarily selected from known composite structures. The ratio of the magnetic component in the fiber cross section is
Although it depends on the mixing ratio of the magnetic particles in the magnetic component, it is usually 5 to 80%, particularly 10 to 50% is suitable.

The magnetic fiber which is the magnetic recording medium in the present invention is a mixed fiber, a mixed yarn, a twisted yarn, a mixed spun yarn of the fiber or the fiber and another (non-magnetic) fiber, or a warp of a fabric or / And mixed by the method of knitting and weaving in the weft direction. In this way, by using the recording medium as one constituent yarn of the cloth, a magnetically recordable cloth that can be processed in the same manner as an ordinary cloth can be obtained.

The magnetic fiber can be mixed in every part of the cloth, but since the cloth may be bent due to shrinkage, expansion, and distortion of the cloth during processing, it becomes difficult to read the recorded information. Therefore, as shown in FIG. Usually, it is preferable that the width of 3 mm or more, preferably 5 mm or more, and most preferably 1 cm or more is in close contact with a part of the fabric and is mixed in parallel. In addition, as a warp yarn in the selvage, a weft yarn in a portion corresponding to an unnecessary portion as a product,
It can be mixed in such a manner as to occupy one region in the fabric as shown in FIG. In order to maintain the aesthetics of the fabric, it is preferable to mix magnetic fibers, which are easily colored with magnetic particle colors (brown, black, etc.), into unused parts such as ears as product. If a magnetic fiber is made hard to be seen on the surface of the fabric by mixing the back yarn with a woven structure such as a woven structure, the mixing position is arbitrary. The magnetically recordable cloth thus obtained can be magnetically recorded by magnetizing the magnetic N / S pattern in the longitudinal direction or the vertical direction.

[0012]

EXAMPLES The present invention will be specifically described below with reference to examples.

Example 1 Surface-treated with 5% by weight of stearic acid Average particle size 0.05
MP1 is a polymer in which 70 μm of barium ferrite particles of μm are uniformly mixed with nylon 6 (melting point 215 ° C.) having a molecular weight of 16000. HP1 is polyethylene terephthalate having an intrinsic viscosity of 0.63 in which 0.5% by weight of titanium oxide particles is dispersed as a matting agent. MP1 is the core component,
HP1 is used as a sheath component with a core / sheath volume ratio of 1/5 to form a core-sheath type composite as shown in FIG. 1, and the temperature is 290 ° C. and the diameter is 0.25 mm.
Spinning from the orifice, cooling and oiling 1
It was wound up at a speed of 000 m / min, further drawn at a draw ratio of 3.2 at 80 ° C., and subjected to a tension heat treatment on a plate heater at 150 ° C. to obtain a drawn yarn Y1 of 480 denier / 20 filament.

Yarn Y1 is drawn on the ears of the 16th count single yarn woolen fabric.
Was closely mixed in parallel in a weft direction with a width of 2 cm, and an N / S alternating pattern of 3 mm pitch as shown in FIG. 5 was recorded in the direction perpendicular to the fabric surface before the finishing step. Next, when this fabric was subjected to finishing processing in a general manufacturing process of woolen fabric such as washing, boiling, steaming, dyeing, etc., no adverse effects were observed on the production machine base and other parts of the product. Also, by examining the magnetic recording information of the finished woolen fabric, the initially recorded magnetic pattern could be read normally.

[0015]

As described above, according to the present invention, a cloth capable of magnetic recording can be easily obtained, which allows unattended operation of the finishing process of the cloth using the automatic recognition technology, production history information management, and length measurement. Labor saving in fabric manufacturing, such as automation of
Unmanned can be achieved. In addition, by sewn a fabric made only of magnetic fibers to textile products such as clothing and bedding, production history information and customer information of the product can be recorded, which is effective in the production, manufacturing, and sales management of textile products. Can be expected to be used.

[Brief description of drawings]

FIG. 1 is a specific example of a composite structure of magnetic composite fibers constituting the cloth of the present invention. In the figure, 1 indicates a magnetic component and 2 indicates a protective component (non-magnetic component).

FIG. 2 is a specific example of a composite structure of magnetic composite fibers constituting the cloth of the present invention.

FIG. 3 is a specific example of the magnetically recordable cloth of the present invention.
In the figure, 3 indicates the cloth of the present invention, and 4 indicates a magnetic fiber mixed portion.

FIG. 4 is a specific example of the magnetically recordable fabric of the present invention.

FIG. 5 is a specific example of a magnetic N / S pattern of a magnetic fiber mixed portion of a magnetically recorded fabric. In the figure, N is an N pole and S is an S pole.

Claims (3)

[Claims] 1. A magnetic recording method characterized in that a magnetic fiber yarn made of synthetic fiber containing magnetic particles is used as a component yarn of a fabric and an arbitrary magnetic pattern combining magnetic N / S characteristics can be recorded. Fabric. 2. The cloth according to claim 1, wherein the magnetic fiber is a composite fiber of a magnetic layer made of a thermoplastic polymer containing magnetic particles and a protective layer made of a fiber-forming polymer. 3. The cloth according to claim 1, wherein the magnetic fiber is made of a fiber-forming polymer in which magnetic particles are uniformly mixed.