JPH0594284U - Sewing thread containing conductive filament - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to provide a sewing thread that does not generate static electricity during sewing. [Structure] As a material, a filament of a thermoplastic 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
Use regular polyester staples or filaments of 1 × 10 ¹² Ω or more and 1 × 10 ¹⁴ Ω or less per cm, and mix 4 to 15% (weight ratio) of the thermoplastic polymer filaments with respect to the total amount. Is characterized by.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sewing thread containing an electrically conductive filament and having an antistatic function.

[0002]

[Prior Art]

 Recently, as a material for sewing threads, polyester fibers or filaments have been replacing conventional cotton fibers because of their high tenacity, uniform quality, and excellent dyeing fastness. However, it has been a problem that the sewing thread made of ordinary polyester staples or filaments generates static electricity due to friction with the sewing needle and the cloth at the time of 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, friction between the needle and the material causes it to become hot and dry, which promotes the generation of static electricity. Therefore, cool the needle itself and its surroundings. 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 sewn fabrics to be made into synthetic fibers has increased, static electricity damage caused by friction between the needle and the sewing thread and between the material and the sewing thread has 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]

In order to solve the above problems, the present invention has the following configuration. That is, as a material, a filament of a thermoplastic polymer containing a white metal compound and having an electrical resistance value of 1 × 10 ⁸ Ω or more and 1 × ^{10 10} Ω or less per 1 cm, and an electrical resistance value of 1 × 10 ⁸ per 1 cm. ^Use composite yarn with staple or filament of regular polyester of ¹² Ω or more and 1 × 10 ¹⁴ Ω or less, and mix 4 to 15% (weight ratio) of the filament of the thermoplastic polymer with respect to the total amount. The configuration is characterized by.

The filament of the 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 1 cm is, for example, 1 of the applicant. The filament of the conductive composite fiber disclosed by a person in Japanese Patent Publication No. 1-22365 can be used.

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

The electric resistance of the filament made of such conductive composite fiber is 1 × 10 ⁸ Ω or more and 1 × 10 ¹⁰ Ω or less per cm. If it exceeds 1 × 10 ¹⁰ Ω, the antistatic function is insufficient, and if it is less than 1 × 10 ⁸ Ω, the conductive action is too strong, causing various troubles such as electric shock.

Explaining the constitutional state of the sewing thread according to the present invention, the simplest form is to use one multifilament of the conductive composite fiber in a yarn formed by twisting a plurality of polyester multifilaments. This is a twist.

Further, as a modification of the sewing thread using the multifilament, there is a composite thread obtained by intertwisting both a normal spun yarn made from staples of regular polyester and a multifilament of conductive composite fiber. Can be used.

Further, as another form of the raw yarn using the multifilament of the conductive composite fiber, a yarn of core yarn having the multifilament as a core and staple fibers as a sheath can be used. That is, while supplying the roving consisting of staples of regular polyester to the draft area of the spinning machine, the multifilament of the conductive composite fiber is supplied to the front roller of the spinning machine, and the regular polyester staple is provided around it. It is in the form of coated yarn.

[0012] Usually, as for the sewing machine thread, two right-handed fine-spun single threads are aligned and subjected to right under-twisting. Three right-twisted single yarns are combined and left-twisted to make a triple twist, or two right-twisted fine-spun single yarns are combined and left-twisted to make two. .

The sewing thread according to the present invention is also obtained by the above-mentioned conventional method, and it is a matter of course that a spun yarn made of ordinary polyester staple fiber and a yarn made of polyester multifilament are treated as a spun single yarn. The above-mentioned conductive composite fiber multifilaments, conductive composite fiber multifilaments as cores, and ordinary polyester multifilament cores as core yarns are also handled as single spinning yarns. The count (fineness) of each raw yarn is appropriately selected according to the yarn count of the obtained sewing thread.

The ratio of the filaments of the electroconductive composite fiber to be mixed needs to be 4 to 15% (weight ratio) with respect to the total amount of the sewing thread. If it is less than 4%, the effect as an antistatic sewing thread cannot be obtained, and if it exceeds 15%, the cost becomes high and it is unsuitable as a sewing thread.

[0014]

[Action]

The sewing thread according to the present invention includes conductive composite fibers, that is, filaments of 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. As a result, static electricity is not generated during sewing, and the contact between the sewing thread and the sewing needle and between the sewing thread and the material is smooth. 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 not contaminated unlike the case where carbon is used as the conductive particles. . The present invention will be described in detail with reference to the embodiments shown in the drawings.

[0015]

【Example】

 Example 1 FIG. 1 is a perspective view showing a part of the sewing thread (1) of Example 1. The sewing thread (1) has the following structure. That is, it contains a white metal compound and has an electric resistance value of 1 × 10 1 per cm 2.⁸Ω ~ 1 x 10^TenMultifilament 20d / 6f [White Bertron (trade name) commercially available from Kanebo Co., Ltd.], which is a thermoplastic synthetic polymer having Ω, is provided with a right twist of 19.5 times per inch, and A thread (2) And the normal polyester multifilament 70d / 24f with right-twisting 19.5 times per inch, and aligned 3 yarns of B yarn (3) and C yarn (4). Also, 15 per inch. It is formed by applying left twist 6 times. The English thread count of the obtained sewing thread is 100 ^S That is, the mixing ratio of the multifilament of the conductive thermoplastic synthetic polymer, that is, the A yarn (2) is 12.5% with respect to the total amount. When the sewing thread (1) obtained in this example was subjected to sewing, static electricity did not occur and very good stitches were obtained. As the filament of the above-mentioned White Bertron, a white metal compound (6) was placed in the center of nylon (5) as a matrix polymer shown in the cross-sectional view of FIG.

Example 2 Instead of the B yarn (3) and the C yarn (4) used in Example 1, regular polyester staple (# 822 commercially available from Kanebo Ltd.) 1 ^D × 42 m 100% was used. Using the 68th count (English count) (right twist 28.9 ^T / in) spun yarn as the raw material, the three yarns of the A yarn (2) used in Example 1 were aligned. , 2.32 left twists were applied per inch to obtain the sewing thread of Example 2. The English thread count of the obtained sewing thread is 90 ^S / 3, and the mixing ratio of the multifilament of the conductive thermoplastic synthetic polymer, that is, the A yarn (2), is 11.3% with respect to the total amount. When the sewing thread obtained in this example was subjected to sewing, the same effect as in Example 1 was obtained.

Example 3 The sewing machine thread of Example 3 has a multi-filament 30d / 5f of White Beltron as a core instead of the A thread (2) of Example 1 and a regular polyester staple 1d × 42 mm as a sheath. The core yarn is 65-number (English-style number) (right twist 28.9 ^T / in). Draw a total of 3 yarns, including the core yarn 65 count (English count) and the regular polyester staple 1d × 42 mm fine spinning yarn 65 count (English count) (right twist 28.9 ^T / in) After being aligned, a left-hand twist was applied 20.7 times per inch to obtain the sewing thread of Example 3. The English thread number of the obtained sewing thread is 60 ^S / 3, and the mixing ratio of the multifilament of the conductive thermoplastic synthetic polymer, that is, the multifilament of White Bertron is 11.3% with respect to the total amount. When the sewing thread obtained in this example was subjected to sewing, the same effect as in Example 1 was obtained.

Example 4 The sewing thread of Example 4 has a core yarn of 65 count used in Example 3, a regular polyester filament 30d / 24f as a core, and a regular polyester staple 1d × 42 mm as a sheath of 65 count ( It is made by aligning three yarns, two finely spun yarns of English count, right twist 28.9 ^T / in), and imparting left twist 20.7 times per inch. The English thread number of the obtained sewing thread is 60 ^S / 3, and the mixing ratio of the multifilament of the conductive thermoplastic synthetic polymer, that is, the multifilament of White Bertron is 11.3% with respect to the total amount. When the sewing thread obtained in this example was subjected to sewing, the same effect as in Example 1 was obtained.

[0019]

[Effect of the device]

 As a thermoplastic synthetic polymer having conductivity, there is 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. , These are well known. However, if these filaments are used as the constituent fibers of the sewing thread, the sewn product will be soiled. However, in the present invention, since the white metal compound is used as the conductive particles, such contamination is not caused and the problem described at the beginning is completely solved.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional view of a thermoplastic synthetic polymer filament.

[Explanation of symbols]

 1 Sewing thread 2 A thread 3 B thread 4 C thread 5 Nylon 6 White metal compound

Claims (1)

[Scope of utility model registration request] 1. A material containing a white metal compound and having an electric resistance value of 1 × 10 ⁸ Ω or more per cm, and 1 × 10 ¹⁰
A thermoplastic polymer filament of Ω or less and a regular polyester staple or filament having an electric resistance value of 1 × 10 ¹² Ω or more and 1 × 10 ¹⁴ Ω or less per cm are used, and the thermoplastic polymer is used for the whole amount. A sewing thread containing a conductive filament, wherein a combined filament is used in an amount of 4 to 15% (weight ratio).