JPH0585878U - Antistatic polyester sewing thread - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to provide a sewing thread that does not generate static electricity during sewing. [Structure] A staple (4) of a thermoplastic synthetic polymer containing a white metal compound as an original thread and having an electric resistance value of 1 × 10 ⁸ Ω or more and 1 × 10 ¹⁰ Ω or less per cm, and an electric resistance value Use a blended yarn composed of staples (3) of regular polyester of 10 ¹² Ω or more and 10 ¹⁴ Ω or less per 1 cm, and contain the thermoplastic synthetic polymer staple in an amount of 0.2 to 5% (weight ratio). Is characterized by.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an antistatic sewing thread that uses conductive fibers, and more particularly, to an antistatic polyester sewing thread that is made by mixing staple fibers of regular fibers with regular polyester staple.

[0002]

[Prior Art]

 Recently, as a material for sewing thread, conventional cotton fibers are being replaced with polyester staples because of their high tenacity, uniform quality, and excellent dyeing fastness. It is a problem that the sewing thread, which consists of ordinary polyester staples, generates static electricity due to friction between the sewing needle and the material during sewing. As a conventional method for 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, friction between the needle and the material causes it to become hot and dry, which promotes the generation of static electricity, so the needle itself is cooled. Etc. are adopted.

[0003]

[Problems to be solved by the device]

 However, the antistatic method has a drawback that the oil agent or silicone oil may ooze out from the seam, and the other method complicates the apparatus to be used and the effect obtained is unstable. In addition, as the tendency of synthetic materials to be woven into synthetic materials has become stronger, the problems of static electricity caused by friction between the sewing needle and the sewing machine and between the material and the sewing machine have become more and more problematic. The present invention aims to provide a new sewing thread that solves the above problems.

[0004]

[Means for Solving the Problems]

The present invention has the following configuration to solve the above problems. That is, a staple which is a thermoplastic synthetic polymer containing a white metal compound and having an electric resistance value of 1 × 10 ⁸ Ω to 1 × 10 ¹⁰ Ω per cm, and an electric resistance value of 1 × 10 ¹² Ω per cm. The above is a blended yarn composed of regular polyester staples of 1 × 10 ¹⁴ Ω or less, which is characterized in that the polymer staple is contained in an amount of 0.2 to 5% (weight ratio).

It contains a white metal compound and has an electric resistance value of 1 × 10 1 per cm.⁸Ω or more 1 × 10 ^Ten As the staple of the thermoplastic synthetic polymer having Ω or less, for example, the electroconductive conjugate fiber disclosed in Japanese Patent Publication No. 1-22365 by one of the present applicants can be used.

The electrically conductive composite fiber comprises a non-conductive layer made of a fiber-forming polymer, 50 to 15% by weight of a crystalline thermoplastic polymer having a melting point lower than that of the polymer by at least 30 ° C., and an electrically conductive coating. A titanium oxide particle having a content of 50 to 85% by weight, and the conductive coating film is 50% by weight or more of a metal oxide and 50% by weight or less of a metal and / or the metal oxide. It is formed from an oxide of a metal different from that of the material.

The electric resistance value of such a conductive composite fiber is 1 × 10 ⁸ Ω or more and 1 × 10 ¹⁰ Ω or less per 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.

Explaining the fineness and the fiber length, it is necessary to have a fine denier in order to secure the flexibility which is a characteristic of the sewing thread, and a fineness of 3 denier or less is preferable. On the other hand, the fiber length must be compatible with the regular polyester staple to be mixed-spun, and if the average fiber length of the staple of the conductive composite fiber and the regular polyester staple are extremely different, draft unevenness will occur in the spinning process and Can not do it. It is preferable to set the average fiber length of the staple of the conductive composite fiber within a range of plus 6 mm and minus 6 mm with respect to the average fiber length of the regular polyester staple.

After the staple of the conductive composite fiber and the staple of the regular polyester having the above-mentioned constitution are mixed and spun by blended cotton, they are successively continuous card, No. 1 for drawing, No. 2 for drawing, single spinning, spinning. A short-spinning method consisting of a spinning machine is used to make a finely spun yarn. After that, the two right-twisted single-spun yarns are aligned and right-twisted, and then three of these are twisted together and left-twisted and twisted to form a six-twist, or The three threads are combined and left-twisted to make a triple-twisted machine thread.

The mixing ratio of the staple of the conductive composite fiber and the regular staple is such that the electric resistance value of the conductive composite fiber, that is, the white metal compound is 1 × 10 ⁸ Ω or more per 1 cm with respect to the total weight. × 10 ¹⁰ Omega the following staple thermoplastic synthetic polymer from 0.2 to 5% (by weight) must be allowed to contain. If it is less than 0.2, the effect as an antistatic polyester sewing thread cannot be obtained, and if it exceeds 5%, the cost becomes high and it is not suitable as a sewing thread.

[0011]

[Action]

The antistatic polyester sewing thread of the present invention contains conductive composite fiber, that is, a white metal compound, and is made of a thermoplastic synthetic polymer having an electric resistance value of 1 × 10 ⁸ Ω or more and 1 × 10 ¹⁰ Ω or less per cm. Since it contains staples, it does not generate static electricity during sewing, and the sewing thread and sewing needle, and the sewing thread and fabric can be brought into contact smoothly. Further, in the present invention, since the white metal compound is used as the conductive particles mixed in the thermoplastic synthetic polymer, the cloth to be sewn is completely prevented from being soiled.

[0012]

【Example】

 The present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 is a perspective view showing a part of the machine thread (1) of the embodiment. As shown in the figure, the sewing thread (1) is composed of three right-twisted single threads (2) and left-twisted triple triple twist, and each single thread (2) is a regular polyester staple (3). (# 822, commercially available from Kanebo Corporation) 1 ^D × 42 mm 95%, containing a white metal compound, the electric resistance value is 1 × 10 per 1 cm⁸-10^TenA thermoplastic synthetic polymer staple (4) [White Bertron (trade name) marketed by Kanebo Co., Ltd.] 3^D× 38 mm 5% blended yarn. In this example, both of the above weight ratios were blended and spun into cotton and passed through a normal short fiber spinning system to produce 65^SThe spun yarn was manufactured, and as described above, three spun yarns were combined and twisted to obtain a sewing thread. As the staple of the above-mentioned White Bertron, the white metal compound (6) of the conductive particles is arranged at the end of nylon (5) as the matrix polymer shown in the transverse sectional view (a) of FIG. The white metal compound (6) is placed in the center of the nylon (5) shown in FIG. 2 (b), and two types are commercially available. In this embodiment, the former one is used. As a comparative example, staple of regular polyester (# 822 commercially available from Kanebo Co., Ltd.) 1^D× 42mm 100% 65^S/ 3 was given and both were subjected to sewing under the same conditions. The results are shown in Table 1.

[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 example itself, it is obtained by cylindrical knitting (27G × 3 1 / 2φ inch flat knitting) The voltage of the tubular knitted fabric was measured. The results are shown in Table 2 below. Sample Cylindrical knitted fabric A: A obtained in the above example B: A obtained in the comparative example Results

[Table 2] -Pretreatment: Washing 3 times-Measuring temperature and humidity: 25 ° C x 33% RH-Friction cloth: Wool JISL-1094-1988 According to the reference method (based on the friction electrification curve measurement method) As shown in Table 2, the sewing machine according to the present invention The antistatic effect of the yarn is extremely remarkable.

[0014]

[Effect of the device]

 As a thermoplastic synthetic polymer having conductivity, a composite fiber in which 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 is well known. Is. However, when these are used as a mixed fiber of sewing thread, the sewn product is stained. However, in the present invention, since the white metal compound is used as the conductive particles, it is possible to completely eliminate the problems described at the beginning without causing such pollution.

[Brief description of 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: Staple of regular polyester 4: Thermoplastic synthetic polymer 5: Nylon 6: White metal compound

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Claims (1)

[Scope of utility model registration request] 1. A staple (4), which is a thermoplastic synthetic polymer containing a white metal compound and having an electric resistance value of 1 × 10 ⁸ Ω or more and 1 × 10 ¹⁰ Ω or less per cm, and an electric resistance value of 1 cm. A blended yarn comprising staples (3) of regular polyester having a density of 1 × 10 ¹² Ω or more and 1 × 10 ¹⁴ Ω or less, wherein the staple of the thermoplastic synthetic polymer is 0.
2-5% (weight ratio) is contained, The antistatic polyester sewing thread.