JP2530540Y2 - Antistatic polyester sewing thread - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing thread having an antistatic property using conductive fibers, and more specifically, an antistatic polyester obtained by blending staples of conductive fibers with regular polyester staples. Related to sewing thread.

[0002]

2. Description of the Related Art Recently, cotton staples are being replaced with polyester staples because of high strength, uniform quality and excellent dyeing fastness as a material for sewing threads. However, it is difficult for a sewing thread made of ordinary polyester staples to generate static electricity due to friction with a sewing needle and a cloth during sewing. As a conventional method of preventing the generation of such static electricity, an antistatic oil agent or silicone oil for reducing frictional resistance is applied to the thread during the processing of the sewing thread. During sewing, high temperature due to friction with sewing needle and fabric,
In addition, the sewing needle itself is cooled because it becomes a dry state and promotes generation of static electricity. And so on.

[0003]

However, in the above-mentioned method for preventing static electricity, oil or silicone oil may ooze out of the seam, and in the other method, the apparatus to be used becomes complicated and the obtained effect is unstable. Has disadvantages. In addition, as the tendency of synthetic fabrics to be woven increases, the problem of static electricity caused by friction between the sewing needle and the sewing machine and the friction between the fabric and the sewing machine increases, and this is becoming a problem. The purpose of the present invention is to provide a new sewing thread which solves such a problem.

[0004]

Means for Solving the Problems The present invention has the following arrangement to solve the above-mentioned problems. That is, a staple, which is a thermoplastic synthetic polymer containing a white metal compound and having an electric resistance of 1 × 10 ⁸ Ω to 1 × 10 ¹⁰ Ω / cm, and an electric resistance of 1 × 10 ¹² Ω / cm to 1 × 10 ¹² Ω. × 1
A blended yarn comprising regular polyester staples of 0 ¹⁴ Ω or less, wherein the staples of the polymer are from 0.2 to 0.2
The composition is characterized by containing 5% (weight ratio).

It contains a white metal compound and has an electric resistance of 1
As the staple of the thermoplastic synthetic polymer having a density of 1 × 10 ⁸ Ω or more and 1 × 10 ¹⁰ Ω or less per cm, for example, a conductive composite fiber disclosed by one of the present applicants in Japanese Patent Publication No. 1-2365 is disclosed. Can be used.

[0006] The conductive conjugate fiber comprises a non-conductive layer made of a fiber-forming polymer and at least 30 ° C lower than the polymer.
50 to 15% by weight of a crystalline thermoplastic polymer having a low melting point and a conductive layer composed of 50 to 85% by weight of titanium oxide particles having a conductive film, and the conductive film is 50% by weight. % Of a metal oxide and 50% by weight or less of a metal and / or an oxide of a metal different from the metal oxide.

[0007] Using those such as the electrical resistance of the conductive composite fiber 1 × 1 × less 10 ¹⁰ Omega least 10 ⁸ Omega per 1 cm. If it is 1 × 10 ¹⁰ Ω / cm or more, it is difficult to prevent charging, and if it is 1 × 10 ⁸ Ω / cm or less, there is a risk of electric shock.

In terms of the fineness and the fiber length, fine denier is required from the viewpoint of securing the flexibility which is the characteristic of the sewing thread, and the fineness of 3 denier or less is preferable. On the other hand, the fiber length must be matched with the regular polyester staple to be blended.If the average fiber length of the staple of the conductive conjugate fiber and the regular polyester staple is extremely different, draft spots may occur during the spinning process and use. Can not. The average fiber length of the staples of the conductive composite fiber is added to the average fiber length of the regular polyester staples by 6 m.
m, preferably set in the range of minus 6 mm.

The staples of the conductive conjugate fiber and the staples of the regular polyester having the above constitution are blended with a blended cotton, and then successively carded.
Spinning is performed through a short fiber spinning system consisting of a number, single spinning, and spinning machines. After that, two right-twisted spun single yarns are aligned and subjected to right priming, and the three are combined and left-twisted to give a 6-twist or a right-twisted single yarn. The three threads are combined and left-twisted to form a three-ply twisted sewing thread.

The mixing ratio of the staples and the regular staples of the conductive conjugate fiber is such that the electric resistance value containing the conductive conjugate fiber, that is, the white metal compound, is 1 × 10 ⁸ Ω or more, 1 × 0.2 to 5% (weight ratio) of staples of thermoplastic synthetic polymer of 10 ¹⁰ Ω or less
It must be included. If it is less than 0.2, the effect as an antistatic polyester sewing thread cannot be obtained, and 5%
Exceeding the cost increases the cost and is unsuitable as a sewing thread.

[0011]

The antistatic polyester sewing thread according to the present invention contains a conductive composite fiber, that is, a white metal compound, and has an electric resistance value of 1 × 10 ⁸ Ω or more and 1 × 10 ¹⁰ Ω or less per cm. Since the combined staples are included, static electricity is not generated at the time of sewing, and the sewing thread and the sewing needle, and the sewing thread and the fabric are smoothly contacted. Further, in the present invention, since the white metal compound is used as the conductive particles mixed into the thermoplastic synthetic polymer, the cloth to be sewn is completely prevented from being stained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the drawings. FIG. 1 is a perspective view showing a part of the sewing thread (1) of the embodiment. As shown in the figure, the sewing thread (1)
Consists of three right-twisted single yarns (2) and left-twisted three-core twisting. Each single yarn (2) is a regular polyester staple (3) (# 822, commercially available from Kanebo Co., Ltd.) 1 ^D ×
Staple (4) of a thermoplastic synthetic polymer containing 42 mm 95% of a white metal compound and having an electric resistance of 1 × 10 ⁸ to ¹⁰ 10 per cm (4) [White Beltron (trade name) commercially available from Kanebo Co., Ltd.] 3 is made from ^D × ^38mm5% of blended yarn. In the present embodiment, both the weight ratio and blend blow room installation cotton, which produce a spun yarns of 65 ^S through the ordinary short fibers紡方expression, as described above, folded and twisted yarn three this spun yarns Then, a sewing thread was obtained. As the staples of the white beltron described above, a white metal compound (6) of conductive particles is disposed at an end of nylon (5) as a matrix polymer shown in a cross-sectional view (a) of FIG. Two types are available on the market, in which the white metal compound (6) is arranged in the center of the nylon (5) shown in b). In the present embodiment, the former is used. It mentioned regular polyester staple (aforementioned Kanebo Ltd. commercial # 822) 1 ^D × 42mm100% of 65 ^S / 3 as a comparative example were subjected both to the sewing of the same conditions. Table 1 shows the results.

[Table 1] As shown in Table 1, it is understood that the sewing thread of the example has excellent sewing ability.

Since it is difficult to measure the antistatic effect of the sewing thread obtained in the embodiment itself,
(7G × 3 1 / 2φ inch flat knitting), and the charged voltage of the obtained tubular knitted fabric was measured. The results are shown in Table 2 below.

[Table 2] As shown in Table 2 according to the JISL-1094-1988 reference method (based on the triboelectric charging curve measurement method), the antistatic effect of the sewing thread according to the present invention is extremely remarkable.

[0014]

As the thermoplastic synthetic polymer having conductivity, a conductive layer made of a polymer in which conductive particles such as metal particles and carbon black are mixed and a non-conductive layer made of a fiber-forming polymer are joined. Bicomponent fibers are well known. However, if these are used as a blended fiber of a sewing thread, the sewn product will be stained. However, in the present invention, since the white metal compound is used as the conductive particles, the problem described at the outset can be completely solved without causing such contamination.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a sewing thread of an embodiment.

FIG. 2 is a cross section of a thermoplastic synthetic polymer.

[Explanation of symbols]

 1: sewing thread 2: single thread 3: regular polyester staple 4: thermoplastic synthetic polymer 5: nylon 6: white metal compound

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location D02G 3/04 D02G 3/04

Claims (1)

(57) [Scope of request for utility model registration] 1. A staple (4), which is a thermoplastic synthetic polymer containing a white metal compound and having an electric resistance of 1 × 10 ⁸ Ω or more and 1 × 10 ¹⁰ Ω or less per cm, and an electric resistance of 1 cm A blended yarn comprising regular polyester staples (3) having a staple ratio of 1 × 10 ¹² Ω or more and 1 × 10 ¹⁴ Ω or less per staple.
An antistatic polyester sewing thread comprising 2 to 5% (weight ratio).