JP2010285707A - Woven fabric for uniform, and garment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a woven fabric for a uniform which has sufficient conductivity even when interposing a sewn part therein, protects a device, an electrical material, or the like from static electricity, and has a stable value of surface leakage resistance even after being washed. <P>SOLUTION: The woven fabric for the uniform is such that warp and weft yarns thereof respectively contain double covering yarns having conductive fibers in a sheath part. The value of surface leakage resistance where the sewn part is held in the fabric is 1×10<SP>9</SP>Ω or less, and the value of surface leakage resistance after 100 times of washing in conformity with JIS L0217 103 is 1×10<SP>9</SP>Ω or less. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a fabric suitable for uniform clothing. Specifically, the present invention relates to a fabric that can be preferably used for uniform clothing worn when manufacturing electronic devices, electronic components, electronic materials, chemicals, and the like.

  Fibers made of hydrophobic polymers such as polyester, polyamide, and polyolefin have many advantages such as mechanical properties, chemical resistance, and weather resistance, and are widely used not only for clothing but also for industrial materials. However, since these fibers generate significant static electricity due to friction, etc., they attract air dust to lower the aesthetics, give an electric shock to the human body, and cause discomfort. Problems such as obstacles and flammable explosions on flammable substances can be caused, and therefore many studies have been conducted to impart conductive performance.

  Patent Document 1 describes a core-sheath type composite fiber in which a conductive component containing conductive particles such as conductive carbon black and metal powder is wrapped with a nonconductive polymer. In such a core-sheath type composite fiber, the conductive particles are present only inside the fiber, so that trouble during operation is unlikely to occur and production with good operability is possible. However, since the conductive particles are present only inside the fiber, it is difficult to give sufficient conductive performance to the fabric.

  Patent Document 2 describes a core-sheath type conductive composite fiber in which a conductive component containing conductive particles is arranged in a sheath part. If such a conductive conjugate fiber is used, sufficient conductive performance can be imparted to the fabric, but on the other hand, smooth operation may be hindered.

  Usually, since the conductive fiber contains conductive carbon black, it tends to be poor in stretchability. Moreover, the textile fabric which has electroconductivity is not comprised only with an electroconductive fiber, and the other fiber is often used together. For this reason, when such a woven fabric is applied to uniform clothing, although it depends on the expansion and contraction of the entire woven fabric, some of the conductive fibers with poor stretchability pop out on the surface of the fabric, and the conductive fibers are cut by friction and wear. There is a problem of being. At the same time, the conductive fibers are poor in stretchability, so that the elongation of the entire woven fabric is hindered, and as a result, the strength and elongation characteristics of the woven fabric tend to deteriorate.

  Patent Document 3 discloses a double covering elastic yarn in which an elastic fiber is used as a core yarn and a synthetic fiber filament is wound twice around the elastic yarn. In this yarn, a conductive yarn containing conductive inorganic powder is used as the lower winding yarn for covering, and a crimped yarn is used as the upper winding yarn for covering.

  However, the covering elastic yarn is intended to remove static electricity and is used for stockings and the like. For this reason, the conductive performance is insufficient to be applied to uniform clothing. Another problem remains in that it cannot be sufficiently prevented from jumping out onto the fabric surface.

  Therefore, in Patent Document 4, a synthetic composite long fiber yarn is used as a core yarn and a conductive composite spun yarn is double-covered around the synthetic yarn. There is disclosed a woven fabric in which the yarn is arranged on the other side of the warp.

  However, in this woven fabric, depending on the difference in fineness between the conductive composite spun yarn and the other constituent fibers and the constituent ratio of the conductive composite spun yarn, when the surface leakage resistance value is measured across the sewing part, a stable resistance can be obtained. There is a problem that it is difficult to obtain a value. In particular, when applied to uniform clothing, there is a problem that the surface leakage resistance value in a state in which the sewing portion is sandwiched is significantly lower than the measured value of the fabric.

  Furthermore, in Patent Document 5, in order to solve this problem, when sewing a fabric, a conductive tricot knitted fabric made of conductive fibers is used as a sewing portion, and thus the conductive performance after sewing is maintained. ing. According to this proposal, a good surface leakage resistance value can be obtained across the sewing portion. However, this is limited to immediately after sewing, and when washing is repeated, the surface leakage resistance value of the sewn portion becomes unstable due to the shrinkage of the tricot knitted fabric. In addition, in this proposal, since a conductive tricot knitted fabric is used, there is a problem that costs are increased, and there is a problem that sewing is troublesome.

JP 09-143821 A WO2002 / 075030 JP-A-11-279881 Japanese Patent No. 3880743 Japanese Patent Laid-Open No. 2008-1996

  The present invention solves the above-mentioned problems, has sufficient conductive performance even when the sewing part is sandwiched, protects devices and electronic materials from static electricity, and has stable surface leakage resistance even after washing It is a technical problem to provide a uniform fabric having a value.

  The inventors of the present invention have arrived at the present invention as a result of studies to solve the above problems. That is, the present invention is summarized as follows.

1. It is a woven fabric containing a double covering yarn with conductive fibers arranged in the sheath part in the warp and weft, and the surface leakage resistance value with the sewing part sandwiched is about 100 times before and after washing based on JIS L0217 103 method. Uniform fabrics, both of which are 1 × 10 ⁹ Ω or less.
2. A woven fabric containing a double covering yarn having a conductive fiber in the sheath and other yarns in the weft, the total fineness A of the double covering yarn and the total fineness B of the other yarns The ratio (A / B) is 1.1 to 5.0, and the surface leakage resistance value in the state where the sewing part is sandwiched is 1 × 10 both before and after washing 100 times according to the JIS L0217 103 method. ^A woven fabric for a uniform characterized by being ⁹ Ω or less.
3. The conductive fiber is a fiber comprising a conductive component, and the conductive component is polybutylene terephthalate whose main repeating unit is butylene terephthalate, and at least one of isophthalic acid (A) and adipic acid (B) is as follows: 3. The uniform woven fabric according to 1 or 2 above, which is a copolymerized polybutylene terephthalate copolymerized in an amount satisfying the formula range and containing conductive particles.
(A copolymerization amount) + (B copolymerization amount) = 5 to 55 mol%
However, (A copolymerization amount) ≦ 45 mol%
4). 4. A garment using the woven fabric for uniform according to any one of 1 to 3, wherein three or more woven fabrics overlap to form a sewing part.

  In the woven fabric for a uniform according to the present invention, a double covering yarn in which conductive fibers are arranged in a sheath portion is used. For this reason, good conductive performance can be maintained even when the sewing portion is sandwiched. Moreover, if the specific fineness difference is provided between the yarns constituting the woven fabric, the conductive performance of the woven fabric can be further enhanced.

  Moreover, the fabric for uniform of this invention can maintain the outstanding electroconductivity after washing. Therefore, it is suitable for clothing worn when manufacturing an electronic device, an electronic component, an electronic material, a medicine, or the like.

It is one embodiment which shows the cross-sectional shape which cut | disconnected the electroconductive fiber in this invention perpendicularly | vertically with respect to the longitudinal direction of a fiber. It is another embodiment which shows the cross-sectional shape which cut | disconnected the electroconductive fiber in this invention perpendicularly | vertically with respect to the longitudinal direction of the fiber. It is one embodiment which shows the cross-sectional shape which cut | disconnected the electroconductive fiber perpendicularly | vertically with respect to the longitudinal direction of the fiber. It is a schematic diagram which shows one embodiment of the double covering yarn which distribute | arranged the electroconductive fiber to the sheath part. It is an example of the schematic diagram of the sewing part preferably employ | adopted for this invention.

  Hereinafter, the present invention will be described in detail.

  In the woven fabric for a uniform according to the present invention, a double covering yarn in which conductive fibers are arranged in a sheath portion is used.

  As the conductive fiber constituting the double covering yarn, even a fiber composed of only a conductive component can be used, but preferably a non-conductive component and a conductive component containing conductive particles. Use composite fiber. In this case, the former is generally composed of a fiber-forming polymer, and examples of the fiber-forming polymer include synthetic resins such as polyester resins and nylon resins, and polyester resins are particularly preferable. On the other hand, a fiber-forming polymer is used for the latter as well, but since the conductive performance cannot be exhibited only by this, it is generally used by adding conductive particles to be described later.

  The shape of the conductive fiber is generally preferably a filament (long fiber). In actual use, it is preferably used in the form of a so-called multifilament in which a plurality of filaments are bundled.

  When the conductive fiber is a composite fiber, any combination of the two components can be adopted as long as the conductive performance can be kept good, but preferably the longitudinal direction of the fiber. A mode in which a part of the conductive component is exposed on the fiber surface in a cross section cut vertically is adopted. For example, if the cross-sectional shape of the fiber is as shown in FIG. 3, the conductivity of the woven or knitted fabric may not reach a desired level even if the conductivity of the fiber itself is good. .

  In the case of the present invention, the cross-sectional shape of the conductive fiber is particularly preferably an embodiment in which the conductive component communicates near the center of the fiber and a plurality of conductive components are exposed on the fiber surface. As a result, there are conductive contacts on the surface of the fiber, and the electrical flow between the contacts through the central part enables multi-directional flow. it can. However, when the number of exposed portions of the conductive component increases, the exposed area of the conductive component on the fiber surface increases, and as a result, cracks and omissions tend to occur after sterilization. For this reason, the exposed portion is particularly preferably 3 to 8, and the ratio of the exposed area of the conductive component on the fiber surface is preferably 3/4 or less, more preferably 1/2 or less of the circumference, more preferably Is 1/3 to 1/10.

  Specifically, the cross-sectional shape of the conductive fiber preferably employed in the present invention is illustrated in FIGS. In this case, as described above, it has already been described that it is preferable that there are a plurality of portions where the conductive component is exposed on the fiber surface and that the conductive component communicates with the vicinity of the fiber center. An example thereof is shown in FIGS. In FIG. 2A, the conductive component portions are arranged in a straight line passing through the vicinity of the center of the fiber, and there are two portions exposed on the fiber surface. In (b), the conductive component portion is arranged in a cross shape through the vicinity of the center of the fiber, and there are four portions exposed on the fiber surface. In (c), the conductive component portion is arranged in three shapes passing through the vicinity of the center portion of the fiber, and there are three portions exposed on the fiber surface.

  And as a composite ratio of the nonelectroconductive component and electroconductive component in the said composite fiber, it is preferable that a nonelectroconductive component shall be 60-90 mass%, and an electroconductive component shall be 40-10 mass%, More preferably, The non-conductive component is 70 to 85% by mass, and the conductive component is 30 to 15% by mass. When the composite ratio of the conductive component is less than 10% by mass, the conductive performance may not be sufficient. On the other hand, when the composite ratio of the conductive component exceeds 40% by mass, the yarn quality performance such as the strong elongation property is inferior. Or troubles during operation and cracks after sterilization.

  Moreover, in this invention, the electroconductive performance of an electroconductive fiber is evaluated by an electrical resistance value. The electrical resistance value is measured as follows according to the AATCC76 method. That is, the conductive fiber (the number of filaments is not limited) is cut to about 15 cm in the length direction, and 10 samples are collected. Apply keratin cream to the surface of both ends of this sample, connect this surface part to a metal terminal, apply a 50V direct current with a sample measurement length of 10 cm, and measure the current value. Is calculated. The arithmetic average value of the calculated electric resistance values of 10 samples is used.

Electric resistance value = E / (I × L)
However, E: Voltage (V) I: Measurement current (A) L: Measurement length (cm)

  Next, the conductive component to be included in the conductive fiber will be described. Polyester resins that are preferably employed as the resin constituting the conductive component include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and the like. Of course, these are used alone or blended or copolymerized. Things can also be used.

  Among them, it is preferable to use PBT. Since PBT is a resin with very high crystallinity, it reduces the alignment defects of the conductive particles, and can maximize the performance of the conductive particles. Furthermore, by containing a specific copolymerization component in PBT, the content of the conductive particles can be increased, and the conductive performance can be further improved.

  As such a copolymerization component, isophthalic acid and adipic acid are preferable, and it is preferable to copolymerize either one or both as a copolymerization component. Thereby, the compatibility (surface wettability) between the conductive component and the conductive particles can be improved, the mixing amount of the conductive particles can be increased, and excellent conductive performance can be exhibited. Furthermore, the flexibility of the polymer is improved, the spinning and drawing process can be performed smoothly, and the conductive performance can be uniform in the length direction.

  Regarding the copolymerization amount of these copolymer components in PBT, when isophthalic acid and adipic acid are used in combination, the total copolymerization amount should be 5 to 55 mol%, especially 10 to 50 mol%. Is preferred.

  If the copolymerization amount of both is less than 5 mol%, the improvement in compatibility (surface wettability) with the conductive particles cannot be expected so much, and the increase in the amount of conductive particles mixed in and the flexibility of the polymer are improved. The effect of improving the arrangement of the conductive particles cannot be achieved. On the other hand, if it exceeds 55 mol%, the polymer itself becomes completely non-crystalline, and it becomes difficult to disperse the conductive particles in the polymer.

  In addition, it is preferable that the copolymerization amount of isophthalic acid shall be 45 mol% or less. If the copolymerization amount of isophthalic acid is outside this range, the effect of improving the arrangement of the conductive particles cannot be obtained as described above, or dispersion of the conductive particles in the polymer becomes difficult.

  Examples of the conductive particles contained in the conductive component include conductive carbon black, metal powder (silver, nickel, copper, iron, tin, or alloys thereof), copper sulfide, copper iodide, zinc sulfide, sulfide. Examples thereof include metal compounds such as cadmium. In addition, a small amount of antimony oxide is added to tin oxide, or a small amount of aluminum oxide is added to zinc oxide to form conductive particles.

  Furthermore, it is also possible to use a conductive particle obtained by coating the surface of titanium oxide with tin oxide and mixing and baking antimony oxide. Among them, preferred is conductive carbon black (acetylene black, ketjen black, etc.) that is generally used for improving the performance of conductive fibers and does not hinder polymer fluidity compared to other metal particles.

  The particle diameter of the conductive particles is not particularly limited, but the average particle diameter is preferably 1 μm or less. When it exceeds 1 μm, the dispersibility of the conductive particles in the polymer tends to be deteriorated, and the fiber tends to have a deteriorated conductive performance and high elongation property.

  The content of the conductive particles in the conductive component may be appropriately selected depending on the type of conductive particles, conductive performance, particle diameter, particle chain-forming ability, and characteristics of the polymer used. It is preferable to set it as -50 mass%, More preferably, it is 10-40 mass%. If the content is less than 5% by mass, the conductive performance may be insufficient. If the content exceeds 50% by mass, it is difficult to disperse the conductive particles in the polymer.

  As described above, when the above-described composite fiber is employed as the conductive fiber, it is preferable that the non-conductive component is also formed of a polyester resin. In this case, as in the case of the conductive component, any polyester polymer that can be melt-spun can be used for the non-conductive component, and among them, PET, polyethyleneoxybenzoate, PBT, and the like can be used. Of course, it is possible to use a resin having the same component as the conductive component, and it may be a copolymer or a mixture depending on the purpose. In addition, it is also preferable to consider the compatibility with the conductive component from the viewpoint of preventing peeling between the non-conductive component and the conductive component.

  In the polyester resin in the conductive component and the non-conductive component, a dispersing agent such as waxes, polyalkylene oxides, various surfactants, organic electrolytes, etc., as long as the effect is not impaired. Stabilizers such as antioxidants and ultraviolet absorbers, colorants, pigments, fluidity improvers, and other additives can also be added.

  Next, the double covering yarn used for the uniform fabric of the present invention will be described.

  Double-covering yarn is a yarn that is formed in such a manner that the yarn (sheath yarn) that constitutes the sheath portion is wound twice in different twist directions around the core yarn (core yarn). In the invention, by providing the conductive fiber in the sheath, it is possible to obtain an excellent conductive effect as compared with the case of obtaining a woven fabric with the conductive fiber alone.

  This is because when conductive fibers are used alone in uniform garments, conductive fibers are generally poor in stretchability, depending on how the fabric is stretched. This is because the fibers jump out on the surface of the fabric. In addition, since conductive fibers are often inferior in strength and elongation characteristics as compared with general fibers, if the conductive fibers jump out on the surface of the fabric, they are easily cut and the intended conductive performance cannot be obtained. Therefore, when using conductive fibers, it is preferable to fix them to other fibers, and from this point, double covering yarn is employed in the present invention.

  FIG. 4 is a schematic diagram showing an example of a double covering yarn that can be used in the present invention. In the double covering yarn, the sheath yarn 2 is wound around the core yarn 1 so as to intersect with each other as shown in this figure. In the present invention, conductive fibers are used as the sheath yarn. By adopting such a double covering yarn, it is possible to expose many conductive fibers as sheath yarns on the surface of the yarn, and as a result, a stable surface leakage resistance value can be obtained in the woven fabric.

  The number of twisted yarns in covering is preferably 200 to 1000 T / M. If it is less than 200 T / M, the exposed ratio of the conductive fibers when the covering yarn is formed may be low, which is not preferable. On the other hand, if it exceeds 1000 T / M, the conductive performance is sufficiently exhibited, but the cost increases, which is not preferable.

  The woven fabric of the present invention includes such a double covering yarn in both warp and weft. Therefore, in this invention, the aspect which comprises a textile fabric only with the said double covering thread | yarn is included. However, the use of only the double covering yarn is not very preferable in terms of fabric strength, production cost, and the like. Therefore, in the present invention, preferably, other yarns are included in the warp and weft yarns together with the double covering yarn.

  In this case, as an arrangement mode of the double covering yarn in the woven fabric, any mode can be adopted. However, if the double covering yarn is unevenly arranged at a specific location in the fabric, the conductive performance of the fabric is likely to be uneven. Therefore, the double covering yarn is arranged at equal intervals in the fabric. preferable. Specifically, it is preferable to arrange the double covering yarns at intervals of 10 mm or less, more preferably 5 mm or less.

  In addition, the double covering yarn is preferably thicker than other yarns from the viewpoint of enhancing the conductive performance of the fabric. Specifically, the ratio (A / B) of the total fineness A of the double covering yarn and the total fineness B of the other yarns is preferably 1.1 to 5.0. When the fineness ratio is less than 1.1, the number of conductive fibers exposed on the surface of the fabric decreases, and it is difficult to obtain stable conductive performance, which is not preferable. On the other hand, if the fineness ratio exceeds 5.0, the conductive fibers may be broken just by being slightly rubbed and worn when it becomes clothing, and it is difficult to maintain stable conductive performance, which is not preferable.

  Here, the area ratio of the conductive fibers exposed on the surface of the fabric is preferably 1 to 30% with respect to the total surface area of the fabric. If the area ratio of the conductive fibers is less than 1%, stable conductive performance cannot be obtained. On the other hand, if it exceeds 30%, stable conductive performance can be obtained, but the cost increases and the woven / knitted fabric obtained. Are unfavorable because they tend to have poor performance such as pilling and snacking.

  As the yarn other than the double covering yarn, basically any yarn can be used. Specific examples include natural fibers such as cotton and wool, regenerated fibers such as rayon, and synthetic fibers such as esters and nylon, which can be appropriately selected according to the purpose. However, since the fabric of the present invention is often applied to uniform clothing or the like worn in a clean room or the like, a synthetic fiber yarn is preferably employed from the viewpoint of dust generation.

  In this case, as a polymer for forming the synthetic fiber yarn, for example, polyethylene terephthalate, polybutylene terephthalate, polyoxyethoxybenzoate, polyethylene naphthalate, cyclohexanedimethylene terephthalate, and these polyesters as an additional portion, isophthalic acid, sulfo In addition to polyester copolymerized with diol components such as isophthalic acid component, propylene glycol, butylene glycol, cyclohexanedimethanol, diethylene glycol, polyamides such as nylon-6, nylon-6.6, aromatic nylon, polypropylene, acrylic, or A compound such as polycapololactone or polybutylene succinate that, when left in soil or water for a long time, is separated into carbon dioxide and water by the action of microorganisms. Aliphatic polyester compounds, and the like to be. In the present invention, among these, polyester is preferably employed from the viewpoint of dimensional stability.

  In addition, as the form of the yarn, an arbitrary one such as a raw yarn, false twisted yarn, interlaced mixed yarn or the like can be adopted. Further, the yarn is preferably composed of a filament, and the cross-sectional shape of the filament is also round, triangular, square, pentagonal, flat, wedge-shaped, wedge-shaped, C-shaped, and H-shaped , I type cross section, W type cross section and the like.

  The woven fabric of the present invention is constituted by using the yarns as described above, and the woven structure is not particularly limited, and plain weave, twill weave, satin weave, entangled weave and the like can be adopted.

Moreover, the conductive woven or knitted fabric of the present invention exhibits excellent conductive performance as described above. Specifically, before washing, the surface leakage resistance value in a state where the sewing part is sandwiched needs to be 1 × 10 ⁹ Ω or less. The surface leakage resistance value is measured according to JIS L 1094 “Reference Surface Leakage Resistance Measurement Method / Kringing Measurement Method”.

If the surface leakage resistance value is reduced, the fabric can be prevented from being charged. Therefore, the fabric becomes more suitable for clothing used in clean rooms for manufacturing semiconductors, various IT-related devices and precision parts. In the case of the present invention, when the surface leakage resistance value exceeds 1 × 10 ⁹ Ω, the conductive performance of the fabric becomes insufficient. The lower limit of the surface leakage resistance value is not particularly limited, but if it is less than 1 × 10 ⁴ Ω, the conductive fiber must contain a large amount of conductive particles. Not only does it adversely affect the properties, but it may also hinder spinning and stretching, which is not preferable. Therefore, after all, the surface leakage resistance value is preferably 1 × 10 ⁴ to 1 × 10 ⁹ Ω.

Furthermore, since the fabric of the present invention is applied to uniform clothing, it is necessary to maintain conductive performance even after repeated washing. However, it is necessary to satisfy the surface leakage resistance value of 1 × 10 ⁹ Ω or less for the woven fabric after 100 times of washing based on the JIS L0217 103 method.

  Next, a method for sewing a fabric will be described.

  As the sewing, basically, a means for preparing two woven fabrics and sewing the end portions can be employed. However, when the fabric of the present invention is applied to uniform clothing, it is preferable that the conductive performance can be stably maintained after sewing and after washing. For this reason, it is preferable that the conductive fibers are positively brought into contact with each other at the sewing portion. From this point, it is preferable that three or more woven fabrics are overlapped and sewn. In this case, more conductive fibers can be brought into contact with each other, particularly when the fabric is sewn in a folded state. In addition, this sewing means is also advantageous in that wrinkles in the sewing portion are efficiently removed.

  Specifically, a structure as shown in FIG. 5 is preferable. That is, it is preferable to fold and sew two woven fabrics alternately and overlap them. In addition, although not shown, it is possible to adopt a mode in which only one fabric is folded and sewn, and a mode in which two fabrics are folded and overlapped and sewn.

  A sewing machine is generally used for sewing, and the sewing stitches of the sewing portion are not particularly limited, but it is preferable to use two instead of one in terms of bringing conductive fibers into close contact with each other. To preferred.

  The number of stitches of the sewing machine is preferably 6 needles / 3 cm or more and 30/3 cm or less, and more preferably 12 needles / 3 cm or more and 20 needles / 3 cm or less. If the number of moving needles is less than 6 stitches / 3 cm, the strength of the sewn portion tends to decrease, and the strength required for the uniform may not be maintained, which is not preferable. On the other hand, if it exceeds 30 stitches / 3 cm, the sewing thread is likely to break during sewing, which is not preferable.

  Further, the sewing method at the time of sewing is not particularly limited, but, for example, main sewing, annular sewing, interlock sewing, and the like are preferably employed from the viewpoint of sewing strength.

  Next, the present invention will be specifically described with reference to examples.

Example 1
Conductive carbon black having an average particle size of 0.2 μm is melt-kneaded at the same time with 75% by weight of copolymerized PBT copolymerized with 8% by mole of isophthalic acid as a conductive component polymer. The component polymer was obtained. Further, copolymerized PET in which 8 mol% of isophthalic acid was copolymerized was melt-kneaded in the same manner as described above, and formed into a chip by a conventional method to obtain a polymer of a nonconductive component. Next, using a spinneret designed so that the cross-sectional shape of the single yarn is as shown in FIG. 1C, the spinning temperature is 260 ° C. and the composite ratio of the conductive component is 20% by mass from an ordinary composite spinning device. Were spun in the manner described above, cooled, and wound up at a speed of 3000 m / min while oiling to obtain an undrawn yarn of 45 dtex 2f. Then, this undrawn yarn is drawn 1.6 times through a 90 ° C. heat roller, and further wound up after being heat-treated with a 190 ° C. heat plate, and has 28 dtex2f exhibiting the cross-sectional shape of FIG. Of conductive fibers were obtained.

  Next, a polyester yarn 56dtex24f (strength 4.2 cN / dtex) manufactured by Unitika Fiber Co., Ltd. is prepared, and a covering machine (PS-D) manufactured by Kataoka Engineering Co., Ltd. is used to wind the conductive fiber around the yarn. -230), and double covering was performed at a twisting frequency of 600 T / M.

  Subsequently, the polyester yarn 56dtex24f and the obtained double covering yarn were warped in an arrangement of 29: 1, and the obtained loom beam was placed in a water jet loom. Then, the above-mentioned two yarns were prepared as wefts, and these were driven by constant exchange to obtain a plain fabric. The raw fabric density of the obtained plain fabric was 100 warps / 2.54 cm and 80 / 2.54 cm, and the mass ratio of the polyester yarn and the double covering yarn was 19: 1.

  The obtained raw machine was successively scoured, pre-set, dyed, and finished by a known method to obtain a woven fabric having double covering yarns arranged at intervals of about 5 mm along the weft direction.

  After obtaining the woven fabric, the two woven fabrics were stitched together so that the sewing part had a structure as shown in FIG. 5, and washing was performed 100 times based on the JIS L0217 103 method. Then, fabrics before and after washing are prepared, the former (before washing) shows the surface leakage resistance value in the state where the sewing part is not caught and the sandwiched state, and the latter (after 100 washing) shows the surface leakage resistance in the state where the sewing part is held. The value was measured. The results are shown in Table 2 below.

(Examples 2 and 3, Comparative Example 1)
A woven fabric was obtained in the same manner as in Example 1 except that the cross-sectional shapes of the copolymer component, the conductive particles, and the conductive fibers contained in the conductive fibers were changed to those shown in Table 1 below. For these woven fabrics, the surface leakage resistance value was measured by the same means as in Example 1.

  As is clear from Table 2, the fabric according to the example exhibited excellent conductive performance before and after washing. However, it can be understood that it is suitable for uniform clothing.

  On the other hand, for the comparative example, although the conductive performance of the conductive fiber itself is good, since the conductive fiber having a shape in which the conductive component is not exposed on the surface is used, the surface leakage resistance when the fabric is used is large. It has become.

1 Core thread 2 Sheath thread

Claims (4)

It is a woven fabric containing a double covering yarn with conductive fibers arranged in the sheath part in the warp and weft, and the surface leakage resistance value with the sewing part sandwiched is about 100 times before and after washing based on JIS L0217 103 method. Uniform fabrics, both of which are 1 × 10 ⁹ Ω or less. A woven fabric containing a double covering yarn having a conductive fiber in the sheath and other yarns in the weft, the total fineness A of the double covering yarn and the total fineness B of the other yarns The ratio (A / B) is 1.1 to 5.0, and the surface leakage resistance value in the state where the sewing part is sandwiched is 1 × 10 both before and after washing 100 times according to the JIS L0217 103 method. ^A woven fabric for a uniform characterized by being ⁹ Ω or less. The conductive fiber is a fiber comprising a conductive component, and the conductive component is polybutylene terephthalate whose main repeating unit is butylene terephthalate, and at least one of isophthalic acid (A) and adipic acid (B) is as follows: The woven fabric for a uniform according to claim 1 or 2, which is a copolymerized polybutylene terephthalate copolymerized in an amount satisfying the formula range and containing conductive particles.
(A copolymerization amount) + (B copolymerization amount) = 5 to 55 mol%
However, (A copolymerization amount) ≦ 45 mol% A garment using the woven fabric for uniform according to any one of claims 1 to 3, wherein three or more woven fabrics overlap to form a sewing part.