JPH10310944A - Antistatic sewing yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an antistatic sewing yarn which inhibits static electricity arising from friction between the sewing needle and the cloth at the time of sewing without requiring modification of the device to thereby improve productivity, give rise to comfortable wear and enhance occupational safety and hygiene by the use of a given amount of a specific electroconductive composite fiber in the yarn. SOLUTION: This yarn contains electroconductive powder 7 such as zinc oxide, silver oxide and copper oxide and 16 to 30 wt.% of a conductive composite fiber 4 having an electric resistance of 1×10<6> to 1×10<11> Ω/cm. This antistatic yarn is preferably comprised of a staple or filament of the conductive composite fiber 4 and a regular polyester.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing thread containing a conductive fiber and having an antistatic function.

[0002]

2. Description of the Related Art Recently, polyester staples or filaments have been used as sewing thread materials instead of conventional cotton fibers because of their high strength, uniform quality, and excellent dyeing fastness. However, a sewing thread made of ordinary polyester staples or filaments has a problem that static electricity is generated due to friction between a sewing needle and a fabric during sewing.

As a conventional method for preventing the generation of such static electricity, (A) an antistatic oil agent or a silicone oil for reducing frictional resistance is applied to a sewing thread during the processing of the thread. (B) At the time of sewing, a high temperature and a dry state occur due to friction between the sewing needle and the cloth, and the generation of static electricity is promoted. Therefore, a method of cooling the sewing needle itself and its surroundings is adopted.

[0004]

However, in the above method (A) for preventing static electricity, oil or silicone oil may ooze out of the seam, and in the method (B), the apparatus to be used becomes complicated and the method is difficult. The effect obtained is also disadvantageous in that it is unstable. In addition, as the tendency of sewn fabrics to increase in fiber size has increased, the problem of static electricity caused by friction between the needles and the sewing thread and between the fabric and the sewing thread has increased, and has become a problem.

Further, according to the Occupational Safety and Health Act enacted in April 1996, when performing work in a place where there is a danger of ignition, explosion, and dust explosion of combustible materials, workers who work are charged with static electricity. It is obligatory to take measures to remove static electricity on workers' bodies, work clothes, etc., such as wearing anti-static work clothes and anti-static work shoes, and there is a strong demand for anti-static measures for clothing. In order to meet such demands, sewing threads for sewing clothing materials having antistatic performance, which have been variously developed, are required to have even higher antistatic performance. An object of the present invention is to provide a sewing thread that solves such a problem.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to provide a method for manufacturing a semiconductor device which contains conductive fine particles and has an electric resistance of 1 × 10 ⁶ to 1 × 10 ¹¹ Ω /
cm, the conductive conjugate fiber is contained in an amount of 16 to 30% by weight.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The sewing thread of the present invention
Contains conductive fine particles and has an electric resistance of 1 × 10 ⁶~ 1 × 1
0¹¹Ω / cm of the conductive composite fiber is 16 to 30 weight
% Is included.

In the conductive composite fiber contained in the sewing thread, when the electric resistance value exceeds 1 × 10 ¹¹ Ω / cm, the antistatic effect is insufficient, and when the electric resistance value is less than 1 × 10 ⁶ Ω / cm, the conductive effect is reduced. Is too strong to cause various troubles such as electric shock.

As the conductive fine particles, a white metal compound is preferable. The conductive fine particles contain the white metal compound and have an electric resistance of 1 × 10 ⁶ Ω / cm or more and 1 × 1 Ω / cm or more.
Examples of the conductive composite fiber having a resistance of 0 ¹¹ Ω / cm or less include those disclosed in Japanese Patent Publication No. 1-2365 by one of the present applicants.

The conductive conjugate fiber disclosed in Japanese Patent Publication No. 1-2365 has a non-conductive layer made of a fiber-forming polymer and a crystalline thermoplastic polymer having a melting point at least 30 ° C. lower than that of the polymer. A conductive layer comprising 50 to 15% by weight of the coalesced particles and 50 to 85% by weight of conductive particles of titanium oxide having a conductive film is bonded to each other, and the conductive film is made of a metal oxide of 50% by weight or more. It is formed of a metal of 50% by weight or less and / or an oxide of a metal different from the metal oxide.

Here, examples of the metal oxide used for the conductive film include copper oxide, silver oxide, zinc oxide, cadmium oxide, tin oxide, lead oxide, and manganese oxide. % Or more, preferably 75% or more, to which 50% or less of a second component such as an oxide of a different metal and / or the same or different metal is added.

Examples of the polymer forming the conductive layer include polyamides such as nylon 6, nylon 66, nylon 12, and nylon 610; polyesters such as polyethylene terephthalate, polyethylene oxybenzene zeate, and polybutylene terephthalate;
Known thermoplastic polymers, such as polyolefins such as polyethylene, polyethers, polycarbonates, and the like, having a crystallinity of 40% or more can be used.

Further, as the polymer forming the non-conductive layer, polyamides such as nylon 6, nylon 66, nylon 12, and nylon 610; polyesters such as polyethylene terephthalate, polyethylene oxybenzene zeate and polybutylene terephthalate; polypropylene;
Polyolefins such as polyethylene, polyvinyl polymers such as polyvinyl chloride and polyvinylidene chloride, and copolymers and modified products thereof are used.

The sewing thread of the present invention comprises such conductive conjugate fibers and staples or filaments of regular polyester.

Next, the form of the sewing thread according to the present invention will be described. One of the simplest forms is a method in which a plurality of regular polyester multifilaments are twisted into a yarn to form the conductive conjugate fiber. Is used and twisted.

Further, as the deformation of the sewing thread using the multifilament, a yarn obtained by intertwisting both a normal spinning yarn made of staples of regular polyester and a multifilament of conductive conjugate fibers is exemplified. You.

Further, as another embodiment using the multifilament of the conductive conjugate fiber, a core yarn having the multifilament as a core and a roving made of regular polyester staple as a sheath, that is, a draft region of a spinning machine is used. While supplying a roving comprising regular polyester staples, a multifilament of the conductive conjugate fiber is supplied to a front roller of a spinning machine, and a yarn coated with regular polyester staples around the multifilament is included. .

Alternatively, a multifilament of conductive conjugate fiber is supplied in front of the front roller at a predetermined distance from the drafted short fiber bundle, and the two filaments are twisted at a twisting portion after the front roller to form a single yarn. A so-called spun twisted yarn composed of multifilaments and rovings of conductive conjugate fibers spun by the spinning twisting method is exemplified.

Normally, the sewing thread is prepared by twisting two single-handed right-twisted spun yarns to give a right-hand twist, and combining these three yarns to give a left-hand twist and a six-ply twist. Or three right-twisted single yarns are twisted to the left to form a three-ply twist, or two right-twisted spun single yarns are twisted to the left to form a two-ply twist. ing.

The sewing thread according to the present invention is also obtained by the above-mentioned conventional method, and the spun yarn composed of regular polyester staple fibers and the yarn composed of polyester multifilaments are treated as a single spun yarn. Multifilament of conductive composite fiber,
Core yarn with conductive multifilament multifilament as core, spinning and twisting of conductive multifilament multifilament with regular polyester staple roving, and sheath with polyester multifilament as core and polyester staple roving as sheath The constituted core yarn is also handled as a single yarn. The count (fineness) of each raw yarn is appropriately selected according to the yarn count of the obtained sewing thread.

The content of the conductive conjugate fiber is 16 to 30% by weight based on the total amount of the sewing thread. When the content is less than 16% by weight, the effect as an antistatic sewing thread cannot be obtained, and when the content is 30% by weight, the antistatic property reaches a saturated state, and no further effect can be obtained even if it is further mixed. Alternatively, the cost becomes high and the sewing thread becomes unsuitable. In addition, if the content of the conductive conjugate fiber with respect to the entire sewing thread is 16 to 30% by weight, any of the single yarns constituting the sewing thread may not include the conductive conjugate fiber. .

As described above, the sewing thread of the present invention contains 16 to 30% by weight of the conductive conjugate fiber, so that static electricity is not generated at the time of sewing, and the sewing thread and the sewing needle, the sewing thread and the cloth are not included. Contact is smooth.

Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to these examples.

Example 1 As shown in FIG. 1, a roving (2) made of regular polyester staple passed through a draft part (1) of a spinning machine, and an upstream of a front roller (3) in the draft part (1). Electric resistance 1 × 10 supplied from the side
^The multifilament 20d / 3f of the conductive conjugate fiber (white beltron (trade name) commercially available from Kanebo Synthetic Fiber Co., Ltd.) of ⁸ Ω / cm (4) is applied to both the twisted portion (5) on the downstream side of the front roller (3). ) S twist at to obtain a single yarn (6) of交撚to 56 ^S at 23 times / inch. FIG. 2 shows a cross section of the obtained single yarn.

The regular polyester staple has a fineness of 1.0 d and a fiber length of 42 mm.
The conductive conjugate fiber (4) is composed of titanium oxide having an average particle diameter of 0.05 μm coated with zinc oxide as a conductive coating, conductive fine particles (7), and aluminum oxide fine particles as a second component having a weight of 4 wt. %, A molecular weight of about 16,000, a melting point of 215 ° C., and a crystallinity of 45%.
Conductive layer (8) obtained by kneading 75% of nylon 6
And a non-conductive layer (9) made of polyethylene terephthalate having a molecular weight of 18,000.

Thereafter, the English cotton count 5 obtained as described above is used.
6 ^S Align two pulling single yarn, Z-twist and twisted at 24 turns / inch to give 56 Antistatic sewing thread ^S / 2 (10). At this time, the content of the conductive conjugate fiber (4) relative to the total amount of the sewing thread (10) was 21.0% by weight.

Example 2 Regular polyester, S twist, 19.5 turns / inch,
Two 70d / 24f multifilaments and a multifilament S of the same conductive conjugate fiber as in Example 1 above
Twist, 19.5 turns / inch, 20d / 3f in total, twisted with a twisting machine at Z twist, 15.6 turns / inch, 160d
Filament sewing thread was obtained. At this time, the content of the conductive conjugate fiber with respect to the total amount of the sewing thread was 21.0% by weight.

Comparative Example 1 A staple using regular polyester 2
The roving yarn is supplied at an appropriate distance in the draft part of the spinning machine, and is sent to the twisting part on the downstream side of the draft part.
Twisted, resulting 22.2 times / twisted 56 seminal紡単yarns of ^S in inches two pull aligned, further twist Z, to twisted at 23.8 turns / inch, 56 ^S / 2 of the sewing yarns Was. That is, in Comparative Example 1, the content of the conductive conjugate fiber with respect to the total amount of the sewing thread is 0% by weight.

The sewing threads thus obtained in Examples 1 and 2 and Comparative Example 1 were combined with 65% by weight of polyester and 35% of cotton.
% By weight and sewn the fabric at 40 mm intervals at 20 ° C. × 40% RH.
Based on the method, the triboelectric charge amount when 650 cm ² was rubbed with an acrylic cloth was measured. As a result, in the sample of Comparative Example 1 in which the sewing thread not including the conductive composite fiber was sewn, the charge amount was 15.0 × 10 ⁻⁶ C / m ² , but the sample did not include the conductive composite fiber. In the sample to which the sewing thread of Example 1 was sewn, the charge amount was 4.2 × 10 ⁻⁶ C /
m ² , and in the sample sewn with the sewing thread of Example 2 also containing a conductive conjugate fiber, the charge amount was 5.
The charge amount was 1 × 10 ⁻⁶ C / m ² , which was extremely lower than that of Comparative Example 1 in which a sewing thread containing no conductive composite fiber was sewn.

The sewing thread obtained in Example 1 and Comparative Example 1 was used to sew a skirt and wear it. In comparison with the above, no clinging due to static electricity or discomfort due to discharge was felt, and the adsorption of dust was reduced.

[0031]

Since the sewing thread of the present invention contains 16 to 30% by weight of the conductive conjugate fiber, the static electricity generated by the friction between the sewing needle and the cloth at the time of sewing can be suppressed without requiring modification of the device. In addition to improving productivity, it also suppresses the generation of static electricity during use of a product sewn using this sewing thread, so that not only a comfortable wearing feeling can be obtained, but also it is extremely useful in occupational safety and health.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a main part of an apparatus for manufacturing a single thread of a sewing thread according to one embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a cross section of a single yarn containing a conductive conjugate fiber used for a sewing thread according to an example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Draft part 2 Polyester staple roving 3 Front roller 4 Conductive conjugate fiber 5 Twisted part 6 Single thread 7 Conductive particle 8 Conductive layer 9 Non-conductive layer

Claims (1)

[Claims] Claims: 1. An electric resistance value of 1.times.
The conductive composite fiber of 10 ⁶ to 1 × 10 ¹¹ Ω / cm is
An antistatic sewing thread comprising 16 to 30% by weight.