JP2000314045A - Woven fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a woven fabric that can be processed in the same manner as in the usual cloth and is magnetically bar code-readable and recordable with exactness and is useful as an indication mark, etc., for fiber products by recording the magnetic in formation through an arrangement of the magnetic fibers. SOLUTION: This woven fabric contains a magnetic fiber 32 of a monofilament or the like having the sheath-core conjugated structure comprising the core of a thermoplastic polymer containing preferably 20-80 wt.% of a magnetic particle such as γ-iron oxide (an average particle diameter is preferably <=2 μm) and the sheath of polyester or a polyamide in a warp or a weft, and magnetic information is recorded by an arrangement of the magnetic fiber 32. Preferably, the woven fabric is a mesh woven fabric having <=300 meshes, the fiber constituting the woven fabric is a sheath-core type monofilament and the sheath component is a fiber having heat-fusibility.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fabric on which bar code information is magnetically recorded.

[0002]

2. Description of the Related Art Automatic recognition technology using identification marks such as barcodes, OCRs, and magnetic recordings is a method of directly writing marks on products so that sales management in the distribution industry, production management in various manufacturing industries, It is widely used in all fields such as labor saving of manufacturing process.

[0003] In the manufacturing process of textiles such as fabrics and clothing, the form with the mark can be utilized by integrally managing it with the product, but information of the object is often released due to dissipation. For this reason, there is an increasing demand for recording marks directly on products.

[0004] However, it is difficult to obtain a printed surface having a higher smoothness than that of paper or film on the fabric surface of a fiber product, and it is difficult to obtain a bar code or an OC.
Symbols such as R are difficult to print, and even if printing is possible, reading errors often occur due to expansion and contraction of the fabric, printing by chemical treatment such as alkali during the processing process of the fabric, heat or mechanical treatment At present, there is no established technique for providing identification marks to fabrics, for example, that the magnetic recording medium such as a magnetic card is not peeled or damaged during processing and is difficult to attach to a fabric.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a process which can be processed in the same manner as a normal fabric, and that bar code information can be magnetically recorded and read reliably, and can be used as an identification mark for textile products. To provide textiles.

[0006]

That is, the present invention provides a core-sheath magnetic composite monofilament having a thermoplastic polymer containing magnetic particles as a core component and a polyester or polyamide as a sheath component, and a predetermined mixing pattern as a weft or warp of a woven fabric. Is a magnetic polyester mesh fabric of 300 mesh or less capable of magnetically recording barcode information interwoven with the above.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The mesh fabric of the present invention is a fabric in which magnetic fibers are mixed as a weft or warp of a fabric in a predetermined pattern using a magnetic recording medium, and bar code information is obtained by magnetizing the magnetic fibers. Can be magnetically recorded.

The magnetic fibers mixed into the woven fabric are made of a thermoplastic polymer in which magnetic particles are uniformly dispersed. As the thermoplastic resin, polyamide (for example, 6 nylon, 6.6 nylon, 12 nylon, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, etc.), polyolefin (polyethylene, polypropylene, etc.), polyvinyl, polyether, polyurethane, polycarbonate Any polymer can be used as long as it can be spun.

As the magnetic fiber suitably used in the present invention, a monofilament composited in a core-sheath type using a core component made of a thermoplastic polymer containing magnetic particles and a protective component made of polyester or polyamide as a sheath component is exemplified.

In this case, the magnetic particles mixed with the core component of the monofilament have a coercive force of 50 Oe or more.
Preferably at least 100 Oersted, most preferably 2
Those having a value of 00 Oersted or more are preferred. Coercive force is 50
Oersted or more is preferable because there is no possibility that the recorded magnetism will be demagnetized or lost.

The magnetic particles preferably have a Curie point of 150 ° C. or higher. When the Curie point is 150 ° C. or higher, magnetic recording is not likely to be lost even by high heat at the time of washing and ironing for cleaning, which is preferable.

Examples of such magnetic particles include particles conventionally used as magnetic recording materials, such as γ-iron oxide, cobalt-containing γ-iron oxide, chromium oxide, iron-cobalt-nickel alloy particles, and barium ferrite. Other ferrimagnetic materials exhibiting ferromagnetism, such as iron, cobalt, metal particles mainly composed of nickel, composite metal oxide particles mainly composed of iron oxide, samarium, rare earth elements such as yttrium, cobalt and nickel Intermetallic compound particles with 3d transition elements such as neodymium, iron, boron,
There are rare earth elements such as praseodymium, iron and boron, and intermetallic compound particles composed of iron and boron.

The optimal particle size of the particles is usually at most 10 μm, preferably at most 5 μm, most preferably at most 2 μm. A particle size of 10 μm or less is preferable because fiberization is easy.

The mixing ratio of the magnetic particles in the magnetic component varies depending on the particle size and magnetic properties of the magnetic particles used, and the properties of the matox polymer, but is usually in the range of 10 to 90% by weight, particularly 20 to 80% by weight. preferable.

A more preferred example of the fiber used in the present invention is a core-sheath composite monofilament having a sheath component having heat-fusibility. In this case, it is preferable that the sheath component of both the magnetic fiber and the non-magnetic fiber be a heat-sealing component. When the sheath component has heat-fusibility, advantages such as improvement of the morphological stability of the woven fabric and easy attachment of a display label or the like obtained from the woven fabric of the present invention to a fiber product can be obtained.

The components having such heat-fusing properties include the following. That is, terephthalic acid and ethylene glycol as main components, dicarboxylic acid components such as isophthalic acid, adipic acid and azelaic acid and polyalkylene glycols such as diethylene glycol, 1,4-butanediol, propylene glycol, tetramethylene glycol and polyethylene glycol. Low melting point (240 ° C) obtained by copolymerizing a diol component such as
Or less).

When a low melting point copolyester is used for the sheath component, the melting point or softening temperature of the core component matrix polymer is preferably at least 20 ° C. higher than that of the sheath component. An example of such a core / sheath polymer combination is polyethylene terephthalate (melting point 255 ° C.)
/ Isophthalic acid 12 mol% copolymerized polyethylene terephthalate (melting point 227 ° C).

Additives such as a matting agent such as titanium oxide and zinc oxide, a heat stabilizer, an ultraviolet absorber, a flow improver, and a coloring agent can be added to the raw material thermoplastic resin of the fiber used in the present invention. . When a core-sheath composite fiber is used, these additives are preferably added to the sheath portion.

Examples of the composite structure of the magnetic composite monofilament used in the present invention include a core-sheath composite structure having a magnetic component as a core and a protective component, polyester or polyamide as a sheath. 1 and 2 show examples of a composite structure suitable for the present invention. FIG. 1 shows an example of a single-core type, and FIG. 2 shows an example of a multi-core type. In addition, it can be arbitrarily selected from known core-sheath type composite structures. The proportion of the magnetic component in the cross section of the fiber also varies depending on the mixing ratio of the magnetic particles in the magnetic component, but is usually from 5 to 80%, preferably from 10 to 50%.

In the present invention, the magnetic monofilament as the magnetic recording medium is interwoven in a desired pattern as a warp or a weft of a mesh fabric. This weaving pattern becomes barcode-like information, which is potential information at the time of weaving, and the information is recorded by magnetization. That is, since the barcode information is recorded on the woven fabric by the pattern of the magnetic fiber interwoven spacing, it is important that the interwoven interval of the magnetic fiber does not fluctuate due to the environmental temperature and humidity during use in order to accurately read the record.

From the viewpoint of ensuring the accuracy of magnetic information, it is preferable to use a (core-sheath type) monofilament. The magnetic composite monofilament usually has a fiber diameter of 100 μm or less, and the thinner the fiber, the higher the recording density can be. However, if the diameter is too small, it may be difficult to produce a yarn, and preferably 30 to 80 μm.

The weaving density of the present invention is preferably 300 mesh or less. Magnetic composite monofilaments obtained by mixing magnetic particles at a high concentration to form composite fibers are inferior in mechanical properties as compared with ordinary polyester monofilaments, so that it is difficult to produce fine filament monofilaments for high density weaves exceeding 300 mesh.

The woven fabric of the present invention has an advantage that a large number of woven fabric pieces on which the same information is recorded can be manufactured by cutting. In addition, since it can be handled in the same manner as a normal woven fabric, it is highly adaptable in a normal fiber processing step, and a record is not lost by the processing.

The woven fabric thus produced can be magnetized by any known method as long as the position of the magnetic composite monofilament can be accurately measured in the woven fabric. For example, magnetization can be performed by using a general magnetic recording magnetic head, but according to a single-pole or multi-pole magnetization method using a magnetization yoke like a plastic magnet sheet, a large yoke can be used. It is preferable to use it because magnetization in a large area becomes possible.

[0025]

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

Example 1 Average particle size of 0.0 surface treated with 5% by weight of stearic acid
5 μm barium ferrite particles (referred to as P1) were added to nylon 6 having a molecular weight of 16,000 (melting point: 215 ° C.) to form particles P.
1 is a polymer in which 50% by weight is uniformly mixed (MP1)
I got A polymer (MP2) was obtained by uniformly mixing 40% by weight of particles P1 with polyethylene terephthalate having an intrinsic viscosity of 0.60 (melting point: 255 ° C). Intrinsic viscosity 0.70
Of polyethylene terephthalate (melting point 255 ° C)
Let it be 1. Particles P1 were added to polyethylene terephthalate (melting point: 227 ° C.) obtained by copolymerizing 12% by mole of isophthalic acid.
0% by weight was uniformly mixed to obtain a polymer (referred to as HP2).

Using MP1 as a core component and HP1 as a sheath component at a core / sheath volume ratio of 1/10 to form a core-sheath composite as shown in FIG.
It is spun from an orifice having a temperature of 295 ° C. and a diameter of 0.25 mm, wound up at a speed of 1000 m / min while cooling and oiling, and further stretched at 80 ° C. to a draw ratio of 3.2.
Tensile heat treatment was performed on a plate heater at 150 ° C. to obtain a 15-denier monofilament Y1.

A core / sheath composite with a monofilament Y1 at a core / sheath volume ratio of 1/4 using MP2 as a core component and HP2 as a sheath component was spun from an orifice having a temperature of 295 ° C. and a diameter of 0.25 mm, and cooled and oiled. 1000m / m
The film was wound at an in speed, stretched at 80 ° C. to a draw ratio of 3.5, and subjected to a tension heat treatment at 150 ° C. on a plate heater to obtain a 15-denier monofilament Y2.

On the other hand, a temperature of 295.degree.
It is spun from a 25 mm orifice, rolled up at a speed of 1000 m / min while cooling and oiling.
The film was stretched at 3.6 ° C. to a draw ratio of 3.6 and subjected to a tension heat treatment on a plate heater at 150 ° C. to obtain a 15-denier monofilament BY1.

Y1 was used as warp yarns, and BY1 and Y1 were used as weft yarns. Y1 was interwoven at a fixed pattern cycle and finished to fabricate a 200-mesh woven fabric C1. Similarly, Y2 was interwoven at the same pattern cycle as the woven fabric C1, and a woven fabric C2 of 200 mesh was woven. Furthermore, the fabric C2 is at 200 ° C.
And the intersection of Y2 and BY1 was heat-sealed to obtain a woven fabric CK2.

The insertion interval of the magnetic monofilaments in the fabrics C1 and CK2 is 1 to 5 mm. Textile C1, CK
2 was cut into a 30 cm square, and the multi-pole magnetization was performed in a yoke with a pitch of 4 mm (distance between electric wires) using an oil condenser as a power source and a magnetization current of 3000 A, and the magnetized fabrics CM1, C
KM2 was obtained. When a Gauss meter probe was run in the warp direction on the surfaces of the fabrics CM1 and CKM2, the presence or absence of magnetism was confirmed in both fabrics at the same pattern cycle as the insertion pattern cycle of the magnetic monofilament.

The magnetized woven fabrics CM1 and CKM2 were subjected to finishing in a general fiber manufacturing process such as dry cleaning, ironing and high-pressure dyeing, and the magnetic recording pattern was inspected in the same manner as described above. No change was observed in the magnetic recording pattern.

[0033]

As described above, according to the present invention, a mesh fabric capable of recording magnetic barcode information can be easily obtained, and the mesh fabric can be sewn to textiles such as clothing and bedding. Accordingly, the production history information and customer information of the product can be recorded, and it can be expected that the product can be effectively used in the production, manufacture, and sales management of textile products.

[Brief description of the drawings]

FIG. 1 is a specific example of a composite structure of a magnetic composite monofilament used in the present invention.

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

FIG. 3 is a specific example of the mesh fabric of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic component 2 Protective component (non-magnetic component) 31 Non-magnetic fiber 32 Magnetic fiber

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4L035 BB32 BB83 BB89 BB91 DD14 DD20 JJ04 KK01 KK05 4L041 AA07 AA19 AA20 AA25 BA02 BA05 BA21 BA46 BC07 BD03 BD14 BD20 CA06 CA12 CA21 CB05 CB24 CB25 CB28 ADD21 DD05 AA28 AA42 AA56 AB10 AC00 BA01 BA02 CA00 DA08 EB00

Claims (4)

[Claims] 1. A woven fabric containing a magnetic fiber in a warp or a weft, wherein magnetic information is recorded by an arrangement of the magnetic fibers. 2. The woven fabric according to claim 1, wherein said magnetic fiber is a monofilament having a thermoplastic polymer containing magnetic particles as a core component and polyester or polyamide as a sheath component. 3. The woven fabric according to claim 1, wherein the woven fabric is a mesh woven fabric of 300 mesh or less. 4. The woven fabric according to claim 1, wherein the fibers constituting the woven fabric are core-sheath type monofilaments, and the sheath component is a fiber having heat-fusibility.