JP2001098424A - Covering yarn body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a covering yarn body capable of being utilized as a body to be detected, formed so that the presence may hardly be recognized, and especially effectively utilized for attaching a tag for clothing or the like. SOLUTION: This covering yarn body is obtained by coiling a meltable fiber on a metallic fiber, covering the coiled fiber with a synthetic yarn on the meltable fiber, and subjecting the resultant yarn to a heating treatment to melt the meltable fiber and to weld the metallic fiber to the synthetic yarn. Preferably, the metallic fiber consists essentially of at least one kind selected from a group of iron, cobalt, nickel, molybdenum, vanadium, chromium and copper, and the diameter of the metallic fiber is 10-200 μmϕ.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a covering thread usable as an object to be detected, and more particularly to a covering thread formed by melting a molten fiber and welding a metal fiber and a synthetic fiber. It is.

[0002]

2. Description of the Related Art Conventionally, in a supermarket, a rental video store, a music CD store, etc., in order to prevent shoplifting, a security label using an amorphous metal as an object to be detected is directly attached to a product or a security label is attached. The product was inserted into a transparent bag, and the theft of the product was monitored near a store exit by a magnetic system that detects a change in the magnetic field.

[0003] However, since this security label is generally affixed to the outside of a product, its existence can be easily known, and particularly in the case of clothing, the security label can be easily peeled off from the product. Since the clothing and the like can be easily taken out of the transparent bag to which the security label is attached, the effect has not been improved, and the fact is that it is not used much.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and has as its object to provide a covering yarn which can be used as an object to be detected and whose presence is hardly noticed. The present invention relates to a strip, and can be effectively used particularly for attaching a tag to clothing or the like.

[0005]

That is, the present invention relates to a method for winding a molten fiber around a metal fiber, further covering the molten fiber with a synthetic fiber, and then melting the molten fiber by a heat treatment to form a composite fiber with the metal fiber. It is characterized by being fused with fibers. The metal fibers are iron, cobalt,
It is characterized in that at least one selected from the group consisting of nickel, molybdenum, vanadium, chromium, and copper has a main composition, and the wire diameter of the metal fiber is 10 to 200 μmφ.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the above construction, the covering thread of the present invention has the metal fiber and the synthetic fiber welded by melting the molten fiber, so that the covering synthetic fiber moves. It does not peel or peel off, and when cut, it is possible to prevent the metal fibers from jumping out of the cut end.

The molten fibers are not particularly limited, but preferably include low-melting type nylons and polyesters, and the melting point is preferably from 80 to 120 ° C. Heat treatment for melting the molten fiber may be performed by any means, and the heating temperature is preferably 90 to 140 ° C., although it depends on the melting point of the molten fiber used. Needless to say, a heating temperature higher than the melting point of the molten fiber used is required.

Next, in the above structure, the metal fiber is preferably a ferromagnetic alloy having at least one selected from the group consisting of iron, cobalt, nickel, molybdenum, vanadium, chromium, and copper as a main composition. Is preferred.
The composition may contain silicon (Si) or boron (B). The wire diameter of the metal fiber is 10 to
200 μmφ is preferable, and if it is smaller than 10 μmφ, the effect as a magnetic material is diminished, and there is a possibility that cutting is further facilitated. On the other hand, if it is larger than 200 μmφ, it may be difficult to handle as a filament.

[0009] As the synthetic fiber to be wound around the metal fiber and covered from above the molten fiber, those which do not hinder the magnetic properties of the metal fiber are preferable.
Fibers such as polyester, polyamide, and polyurethane are exemplified. Examples of the covering include ordinary single covering and double covering. In the case of double covering, two covers may be combined and then covered in the same direction at the same time. Further, the synthetic fibers to be covered may be colored by yarn dyeing, and can be appropriately selected according to the color of the product to which the present invention is attached.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings and embodiments. The following embodiment is an embodiment of the present invention and does not limit the present invention.

FIG. 1 is a view showing a covering thread 1 of the present invention, and FIG. 2 is a view showing a sectional view taken along line XX of FIG. The covering thread 1 of the present invention is obtained by covering the metal fibers 4 with the synthetic fibers 2 and 3 via the welded portions 5, and for example, as shown in FIG.
Is a double covering in which two yarns are combined and then covered in the same direction at the same time. In the present invention, as shown in FIG. 3, the molten fiber 6 is wound around the metal fiber 4 in advance, the synthetic fibers 2 and 3 are covered from above the molten fiber 6, and then the molten fiber 6 is heated. Is melted, and the metal fiber 4 and the synthetic fibers 2 and 3 are welded.

(Example 1) As metal fibers, cobalt (Co), iron (Fe), silicon (Si), boron (B)
And a low melting point nylon yarn (200d, melting point 120
° C) was wound around the metal fiber with 450 twists. Further, two pieces of nylon 66 (1260d, 300 T / m lower twist) colored by yarn dyeing were combined as a synthetic fiber from above the low melting point nylon yarn, and double covered simultaneously in the same direction. 130 to 140 ° C.
To melt the low-melting nylon yarn, and weld the metal fiber and nylon 66 to obtain a covering yarn of the present invention.

[0013]

As described above, according to the present invention,
In particular, it is possible to provide a covering thread, which is a detection object, which can be effectively used for attaching a tag to clothing or the like and whose presence is hardly noticed.

[Brief description of the drawings]

FIG. 1 is a view showing a covering thread of the present invention.

FIG. 2 is a view showing a cross-sectional view taken along line XX of FIG. 1;

FIG. 3 is a diagram showing a state in which a molten fiber is wound around a metal fiber.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Covering thread 2 Synthetic fiber 3 Synthetic fiber 4 Metal fiber 5 Welding part 6 Molten fiber

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) G08B 13/24 G08B 13/24

Claims (3)

[Claims] After winding a molten fiber around a metal fiber and further covering the molten fiber with a synthetic fiber,
A covering thread formed by melting a molten fiber by a heat treatment and welding a metal fiber and a synthetic fiber. 2. The metal fiber according to claim 1, wherein the metal fiber has at least one selected from the group consisting of iron, cobalt, nickel, molybdenum, vanadium, chromium, and copper as a main composition. Covering thread. 3. The metal fiber has a wire diameter of 10 to 200 μm.
The covering thread according to claim 1, wherein the diameter is mφ.