JP2007191843A - Polyester fiber and fiber product using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polyester fiber having high electroconductivity and very superior stability of the electroconductivity when humidity is changed, and to provide a fiber product such as a fiber brush, obtained by using the polyester fiber and having excellent properties. <P>SOLUTION: The polyester fiber includes a polyester resin composition containing carbon black and composed of trimethylene terephthalate as a main repeating structural unit, and has 1.0×10<SP>12</SP>[Ω/cm] average resistivity P. The polyester fiber product is obtained by using the polyester fiber at least as a part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a polyester fiber excellent in conductivity and a fiber product using the same. More specifically, the present invention relates to a polyester fiber having conductivity excellent in stability when humidity changes, a woven fabric or a knitted fabric using the fiber, and a polyester fiber product such as a brush using the fiber.

  In general, a fiber composed of “polytrimethylene terephthalate (hereinafter sometimes referred to as PTT)”, which is a polyester whose main repeating structural unit is trimethylene terephthalate, has recently been a polyamide (nylon) fiber, a conventional polyester, For example, it has been attracting attention as a fiber that combines the characteristics of both fibers made of polyethylene terephthalate (hereinafter sometimes referred to as PET) and polytetramethylene terephthalate (hereinafter sometimes referred to as PBT). In particular, development is progressing as having low elastic modulus, high elastic recovery, and excellent low-temperature dyeability.

  By the way, “conductivity” is one of important functions in imparting functionality to conventional and future fibers. Conductive fibers are used for the purpose of removing static electricity or as a fiber used for clothing for clean rooms, fiber for carpets, or used for parts incorporated in equipment. By using it for the purpose of imparting, etc., great demand is expected in a wide range of fields such as clothing and various industries. In recent years, with the spread of electronic information devices, especially wireless terminals such as mobile phones, the exposure of electromagnetic waves has increased even in everyday environments, and there are concerns about the impact on health, so it has conductivity In addition to using the conductivity itself as a form of use of the fiber, there are an increasing number of cases where it is used as an electromagnetic shielding material.

For example, techniques relating to antistatic fibers obtained by adding or copolymerizing a hydrophilic compound to PTT have been proposed (see Patent Document 1 and Patent Document 2). In this proposed technique, a fiber having excellent antistatic properties can be obtained, but its conductivity level is at most about 10 ⁸ Ω · cm and does not exhibit high conductivity. Moreover, the electrical conductivity of the fiber obtained by this technique has a strong tendency to depend on the environment used, particularly the moisture content (humidity), and stable electrical conductivity has not been ensured.

In addition, several techniques related to black original polyester fibers obtained by adding carbon black as a pigment to PTT have been proposed (see Patent Document 3, Patent Document 4, and Patent Document 5). However, the technique described in Patent Document 3 is such that carbon black is added to copolymerized PET and blended with PTT, and carbon black is not contained by directly touching PTT. . Therefore, it cannot be expected that carbon black is uniformly kneaded with PTT. In addition, the technique described in Patent Document 4 merely adds a small amount of carbon black, and the technique described in Patent Document 5 contains carbon black at a relatively high concentration. The adsorbed special carbon black is contained, and all are described in the description of general carbon black-added fibers using carbon black as a pigment. Therefore, none of these Patent Documents 3 to 5 pay attention to the conductivity of carbon black, and the prediction and problems to be solved regarding the conductivity when carbon black is added at a high concentration, There is no mention or suggestion about the effect.
JP-A-11-181626 (Claims) JP-A-10-141400 (Claims) JP 2003-89926 A (claims, paragraph [0031]) JP 2003-73534 A (Claims, Examples) JP 2003-138115 A (Claims, paragraphs [0015] and [0016])

  Therefore, the object of the present invention is to pay attention to the fact that the above-described prior art did not substantially consider conductivity, and has high conductivity and excellent conductivity when humidity changes. An object of the present invention is to provide a polyester fiber and a textile product such as a woven fabric or a knitted fabric using the fiber or a brush using the fiber.

In order to solve the above problems, the polyester fiber according to the present invention includes a polyester resin composition containing carbon black, the main repeating structural unit of which is trimethylene terephthalate, and an average resistivity P of 1.0 × 10 ^12. [Ω / cm] or less. That is, it is formed using a polyester resin composition in which carbon black is directly contained and the main repeating structural unit is trimethylene terephthalate, and the average resistivity P as an index indicating conductivity is 1.0 × 10 ^12. It is a polyester fiber having a resistance of [Ω / cm] or less (that is, configured to exhibit extremely high conductivity).

  Preferably, the polyester resin composition forms at least part of the fiber surface, whereby the polyester fiber itself can exhibit high conductivity with respect to the surrounding charges.

  The ratio R (R = Q / P) between the average resistivity P and the standard deviation Q of the resistivity is preferably 0.5 or less, whereby excellent conductivity can be uniformly exhibited.

  Further, the ratio Z (Z = Y / X) of the average resistivity X [Ω / cm] at a temperature of 23 ° C. and a humidity of 55% and the average resistivity Y [Ω / cm] at a temperature of 10 ° C. and a humidity of 15% is given. It is preferable to be in the range of 1 to 5, which makes it possible to exhibit stable conductivity against humidity or changes in humidity and temperature.

  In order to obtain such excellent conductivity, it is preferable to add various devices as described below in the production of polyester fibers, and among them, the content of carbon black in the polyester resin composition is preferably 15% by weight or more. It is preferable to adjust to 50% by weight or less.

  The polyester fiber product according to the present invention is obtained by using the polyester fiber as described above at least partially. For example, it can be configured as a fiber brush using the polyester fiber as described above, and in particular, can be configured as a brush for an electrophotographic apparatus whose demand is increasing in recent years.

  In the polyester fiber according to the present invention, the polyester resin composition used for forming the fiber is obtained by adding carbon black to a polyester whose main repeating structural unit is trimethylene terephthalate, so that a conventional polyester such as ethylene terephthalate is used. It is very different from PET-based polyesters mainly composed of repeating structural units and PBT-based polyesters mainly composed of tetramethylene terephthalate, and even a resin composition containing conductive carbon black at a high concentration can be easily used. It can be used to form fibers. As a result, it has become possible to obtain a fiber having high conductivity, which has been difficult in the past, and the polyester fiber according to the present invention can be used for clothing such as dustproof clothing, vehicle interior materials, building wall materials, etc. It can be used for non-clothing applications such as rugs such as interior materials, carpets and flooring, and can be imparted with desired high conductivity. In addition, since the resin is polyester, there is almost no water absorption or hygroscopicity, and as a result, the conductivity is very less dependent on humidity, and therefore the conductivity is very stable. From these facts, the polyester fiber according to the present invention is used as a material that needs to release static electricity in clothing applications such as dust-proof clothing and in non-clothing applications such as building wall materials, indoor and outdoor carpets, and vehicle interior materials. In addition to being suitably used, various fibers used in applications requiring high conductivity and conductivity stability with respect to environmental changes, for example, wiring objects that are applied with a voltage applied constantly or frequently, electrophotographic devices, etc. It can be suitably used for brushes and the like.

  In addition, the polyester fiber according to the present invention has a standard deviation of the resistivity of the fiber by adopting a configuration in which the carbon black-containing PTT is exposed on at least a part of the fiber surface as one of particularly preferable fiber forms. That is, the conductive spots can be made very small, and the conductive characteristics can be uniformly exhibited. In addition, it is possible to make the ratio of the average resistivity under the temperature and humidity conditions of medium temperature and medium humidity of 23 ° C. and 55% humidity and low temperature and low humidity of 10 ° C. and 15% humidity very low. It becomes possible to further improve the stability of the conductivity with respect to the change.

  Furthermore, as described above, the polyester resin composition according to the present invention is formed as a layer that is responsible for the conductivity of the conductive fiber. As a result, a polyester fiber excellent in conductivity can be obtained. It is possible to develop other than forms. For example, it can be used as a material for various molded products such as films, sheets, or injection molded products, and even in that case, it has higher conductivity than polyester resin compositions such as conventional carbon black-containing PET and PBT. In addition, the brittleness of the resin composition itself due to the inclusion of carbon black is improved while maintaining the stability of electrical conductivity, and the incidence of defects such as cracking and scraping is greatly reduced. Can be obtained. Therefore, the polyester resin composition in the present invention can also be suitably used for applications that require electrical conductivity or antistatic properties.

  Hereinafter, the present invention will be described in detail together with preferred embodiments.

  The fiber in the present invention refers to a thin and long shape, and the length may be a long fiber (filament) or a short fiber (staple). In the case of a short fiber, it may be a desired length depending on the use, but it is preferably 0.05 to 150 mm in length considering that it is used in a spinning process or an electric flocking process as described later, More preferably, it is 0.1-120 mm. Moreover, when using especially for electric flocking, it is more preferable that it is 0.1-10 mm in length, and it is especially preferable that it is 0.2-5 mm.

  Further, the thickness of the fiber of the present invention, that is, the single fiber diameter is not particularly limited, but the single fiber diameter is 1000 μm or less in that it can be used for various applications as described later. It is preferable, it is more preferable that it is 0.1-200 micrometers, and it is especially preferable that it is 0.5-50 micrometers. In particular, when used for a fiber brush and used for a cleaning device or a charging device in an electrophotographic apparatus, the fiber diameter is 0.5 to 30 μm in terms of excellent cleaning performance or charging performance. It is particularly preferred. When used for lining of clothes, dust-proof garments, and other various garments, it is particularly preferably 0.5 to 25 μm. When used for non-clothing applications such as interior materials such as vehicle interior materials, building wall materials, carpets, flooring materials, etc., other than clothing applications, the thickness is particularly preferably 0.5 to 150 μm. Here, the diameter of the single fiber is determined by the method of the M term in the examples described later.

  Here, the diameter of the single fiber is determined by measuring with the optical microscope focused on the outer diameter of the fiber using transmitted light in a range of about 100 to 1000 times. At this time, the single fiber diameter is defined as an average value obtained by observing and measuring at least five points at an interval of 3 cm or more in the same fiber. The single fiber diameter of the irregular cross-section fiber is the length of the straight line when the longest straight line can be drawn from the outer side of one fiber to the outer side of the other fiber, ignoring the hollow part in the cross section of the fiber perpendicular to the fiber axis. This is the single fiber diameter.

  Also, the cross-sectional shape of the fiber is not particularly limited. If the cross-sectional shape of the fiber is round, it is preferable because it has uniform fiber properties and isotropic conductivity within the fiber cross-section. When the fibers are used for brush rollers, they are incorporated in the form of short fibers, woven fabrics, knitted fabrics or non-woven fabrics. For example, in the electrophotographic apparatus described later, the rigidity is increased by giving anisotropy in the bending direction of the fibers. In order to obtain good contact with the toner and to exhibit better cleaning performance, the cross-sectional shape is preferably a flat, polygonal, multileaf, hollow, or indeterminate fiber.

  The fiber of the present invention contains a polyester resin composition (hereinafter referred to as “CB-containing PTT”) in which the main repeating structural unit is composed of trimethylene terephthalate, containing carbon black (hereinafter sometimes referred to as CB) in the fiber. As a part of a structural unit. This CB-containing PTT bears the main conductivity in the fiber of the present invention. Since the CB-containing PTT is present in at least a part of the fiber, the electrical conductivity of the fiber itself can be controlled by the properties of the CB-containing PTT, so that the desired conductive performance can be imparted and very excellent conductivity. It becomes the fiber which has.

  One of the methods for including CB-containing PTT as at least a part of the structural unit in the fiber includes (1) a polymer component having fiber forming ability other than CB-containing PTT, and (2) CB. This can be achieved by blend-spinning at least one selected from CB-containing PTTs having different concentrations and / or polyester compositions whose main repeating structural units are composed of trimethylene terephthalate to form fibers. Here, for blend spinning, CB-containing PTT and at least one of (1) and / or (2) are melted separately and then slipped through the pipe at any stage before discharging. Preferably, it may be blended using a static kneader, or after pre-blending the CB-containing PTT and at least one of the aforementioned (1) and / or (2) at any stage prior to melting. , May be melted together. After melting, it is a slip deformation that passes through the pipe, and it is preferable to blend using a static kneader.

  Since the fiber of the present invention contains CB-containing PTT as at least a part of the structural unit in the fiber, the fiber is formed by composite spinning in which the CB-containing PTT is arranged in at least a part of the fiber. it can. From the viewpoint that stable conductivity with small conductive spots can be expressed in the longitudinal direction of the fiber, a fiber obtained by blend spinning is excellent, but a composite fiber is more preferable because it is more excellent.

  Regarding the configuration of the composite fiber, the CB-containing PTT may be exposed on at least a part of the fiber surface, or the CB-containing PTT may not be exposed on the fiber surface. When the CB-containing PTT is exposed on at least a part of the fiber surface, the CB-containing PTT can be directly brought into contact with the CB-containing PTT so as to exhibit high conductivity, which is very preferable. And as the exposed part and / or the exposed area of the CB-containing PTT increases on the fiber surface, the higher the conductivity, the CB-containing PTT exists on the fiber surface not only at one place but also at two or more places (exposed). It is preferable that the CB-containing PTT is exposed in an area of more than half of the fiber surface. In particular, the fiber surface is entirely covered with the CB-containing PTT in that the larger the area of the CB-containing PTT on the fiber surface, the higher the uniformity of the electrical conductivity on the fiber surface and the entire fiber surface layer. Most preferred. In addition, although the ratio of the CB-containing PTT in the fiber cross section perpendicular to the fiber axis direction (in other words, in the fiber) may be appropriately set according to the intended use, the fiber obtained by the present invention is particularly excellent. The ratio of the CB-containing PTT in the fiber is 7% by volume or more in that the desired fiber properties (for example, strength, residual elongation, initial tensile elastic modulus, etc.) can be achieved while maintaining the conductive performance. In view of the fact that it can be produced more stably, it is particularly preferably 10% by volume or more. In addition, the higher the ratio of the CB-containing PTT, the better the above-mentioned conductive performance is. However, the upper limit of the ratio is preferably 95% by volume or less in view of high temperature heat resistance, and 90 volume. % Is more preferable, and 80% by volume or less is particularly preferable in consideration of the fact that it can be produced more stably. The ratio of the CB-containing PTT in the fiber can be determined from the area ratio of the CB-containing PTT portion in the single fiber cross section to the single fiber cross-sectional area, and measured by the method of the N term in the examples described later. adopt.

  As described above, when the fiber surface layer of the polyester fiber of the present invention is entirely covered with CB-containing PTT, the structure of the fiber is as follows: (3) The inner layer portion of the fiber is the same component as the fiber surface layer. When it consists only of CB-containing PTT, or (4) When the inner layer part is made of a polymer having a fiber forming ability other than CB-containing PTT as used in the present invention, that is, a composite component of CB-containing PTT and components other than CB-containing PTT When the composite fiber is made of In the case of (3), there is no conductive spot in the fiber cross section of the fiber itself, and it is preferable because it has a uniform conductive performance. In the case of (4), for example, components other than the CB-containing PTT may not be included in the CB-containing PTT, so that they may be arranged as components responsible for the fiber properties of the fiber of the present invention, such as strength and elongation, or It may be a layer having another function containing a conductive agent other than CB or the like within a range not impairing the gist of the invention, or may contain another functional component. In the composite fiber in the case of (4), the shape of the core or island in the fiber cross section perpendicular to the fiber axis direction of components other than the CB-containing PTT may be a circle or an ellipse, and may be a triangle or a quadrangle. A wide variety of shapes such as a polygon more than that may be used. In a polygon having a triangular shape or more, usually, the polymer itself has a rounded shape due to the melting behavior of the polymer itself. If the core or island is a circle, it has isotropic strength (rigidity) with respect to bending in the above-mentioned fiber cross section, but in the shape other than a circle, such as an ellipse or a triangle, the bending rigidity is the bending direction. May show different behavior. Especially when used for, for example, a fiber brush, as will be described later, the core or island can be shaped like a triangle or a rectangle other than a circle, or a polygon more than that, so that the rigidity of the fiber itself can be controlled to be high. It can be a very high performance brush.

  On the other hand, the fiber of this invention can also employ | adopt the structure in which CB containing PTT is not exposed to the fiber surface in a fiber. For example, if the CB-containing PTT layer is exposed on the fiber surface, it may be exposed to excessive rubbing depending on the application used, and may be scraped, but it is not exposed to the fiber surface. By doing so, the shaving due to such abrasion does not occur. In addition, by placing the CB-containing PTT in the fiber with a certain thickness from the fiber surface, stable conductive performance can be expressed. When the CB-containing PTT is not exposed on the fiber surface, the CB-containing PTT in the fiber forms a composite fiber with a polymer having fiber forming ability. The CB-containing PTT may be arranged at one place in the cross section of the composite fiber, or may be arranged at two or more places. When it is arranged at a plurality of two or more places, it is preferably arranged at most 100 places. Moreover, when arrange | positioning at two or more places, it is preferable that this CB containing PTT is arrange | positioned so that the distance from the fiber surface may become equal respectively at the point that an electroconductive spot becomes small.

  The fiber of the present invention is made of a polyester whose main repeating structural unit is trimethylene terephthalate (hereinafter sometimes abbreviated as PTT polyester). In the case of other commonly used polyesters such as PET polyester and PBT polyester, usually, when CB is contained at a high concentration (10% by weight or more), yarn breakage frequently occurs during melt spinning. I can't pick it up. However, the PTT polyester component does not change greatly in the melt viscosity even when a large amount of CB is contained, and only a normal PTT polyester is used in a process for forming a fiber, for example, melt spinning. The present inventors have found that melt spinning can be performed in the same manner as melt spinning. As a result, the production of conductive fibers having high conductivity, which was conventionally possible with a polyamide polymer, contains a high concentration of CB even in the case of a polyester polymer, and has high conductivity. It became possible to form fibers.

  The polyester whose main repeating structural unit is trimethylene terephthalate is a polymer formed by esterification of terephthalic acid, which is a carboxylic acid, and trimethylene glycol, which is an alcohol, whose main repeating structural unit is made of trimethylene terephthalate. . The main repeating structural unit means that the trimethylene terephthalate unit is 50 mol% or more. And it is preferable that the component comprised from a trimethylene terephthalate is 80 mol% or more, and it is more preferable that it is 90 mol% or more.

  The polyester in which the main repeating structural unit is trimethylene terephthalate may be copolymerized with other components within the scope of the present invention, that is, within a range not impairing the high melt spinnability when CB is contained at a high concentration. For example, a dicarboxylic acid compound can be copolymerized. Examples of the dicarboxylic acid compound include isophthalic acid, naphthalene dicarboxylic acid, diphenyl dicarboxylic acid, anthracene dicarboxylic acid, phenanthrene dicarboxylic acid, diphenyl ether dicarboxylic acid, diphenoxyethanedicarboxylic acid, diphenylethanedicarboxylic acid, adipic acid, sebacic acid, 1,4 -Aromatic, aliphatic and alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid, 5-sodium sulfoisophthalic acid, 5-tetrabutylphosphonium isophthalic acid, azelaic acid, dodecanedioic acid, hexahydroterephthalic acid, and their alkyl, alkoxy And derivatives such as allyl, aryl, amino, imino, halide, adducts, structural isomers and optical isomers. These dicarboxylic acid compounds may be used alone or in a combination of two or more without departing from the spirit of the invention. Also, a diol compound can be copolymerized. Examples of the diol compound include ethylene glycol, tetramethylene glycol, pentanediol, hexanediol, 1,4-cyclohexanedimethanol, neopentyl glycol, hydroquinone, resorcin, dihydroxybiphenyl, Aromatic, aliphatic, alicyclic diol compounds such as naphthalenediol, anthracenediol, phenanthrenediol, 2,2-bis (4-hydroxyphenyl) propane, 4,4′-dihydroxydiphenyl ether, bisphenol S, and alkyls thereof, Derivatives, adducts, structural isomers and optical isomers such as alkoxy, allyl, aryl, amino, imino, halide and the like can be mentioned. About these diol compounds, you may use individually by 1 type, and may be used in combination of 2 or more type in the range which does not impair the meaning of this invention. Moreover, as a copolymerization component, the compound which has a hydroxyl group and carboxylic acid in one compound, ie, hydroxycarboxylic acid, can be mentioned. Examples of the hydroxycarboxylic acid include lactic acid, 3-hydroxypropionate, 3-hydroxybutyrate, 3-hydroxybutyrate valerate, hydroxybenzoic acid, hydroxynaphthoic acid, hydroxyanthracenecarboxylic acid, hydroxyphenanthrenecarboxylic acid, ( Aromatic, aliphatic and cycloaliphatic hydroxycarboxylic acid compounds such as hydroxyphenyl) vinylcarboxylic acid and their alkyl, alkoxy, allyl, aryl, amino, imino, halide and other derivatives, adducts, structural isomers and optical isomerism The body can be mentioned. These hydroxycarboxylic acids may also be used alone or in combination of two or more without departing from the spirit of the present invention.

  Moreover, in the fiber of this invention, except the case where a fiber consists only of CB containing PTT, when layers other than this CB containing PTT are arrange | positioned, layers other than this CB containing PTT are fiber forming ability as a main component. It is made of a polymer having Examples of the polymer having the fiber forming ability include a polyester polymer, a polyamide polymer, a polyimide polymer, a polyolefin polymer, and other vinyl polymers synthesized by addition polymerization of a vinyl group (for example, a polyacrylonitrile polymer). Fluorine polymers, cellulose polymers, silicone polymers, aromatic or aliphatic ketone polymers, elastomers such as natural rubber and synthetic rubber, and various other engineering plastics. More specifically, for example, as a polyolefin polymer synthesized by a mechanism in which a monomer having a vinyl group is formed by an addition polymerization reaction such as radical polymerization, anionic polymerization, or cationic polymerization, or other vinyl polymers Examples include polyethylene, polypropylene, polybutylene, polymethylpentene, polystyrene, polyacrylic acid, polymethacrylic acid, polymethyl methacrylate, polyacrylonitrile, polytetrafluoroethylene, polyvinylidene fluoride, polyvinylidene chloride, and vinylidene polycyanide. It is done. These may be, for example, a polymer by homopolymerization such as polyethylene alone or polypropylene alone, or may be a copolymer polymer formed by carrying out a polymerization reaction in the presence of a plurality of monomers. When polymerization is performed in the presence of methyl methacrylate, a copolymerized polymer called poly (styrene-methacrylate) is produced. However, such a copolymer may be used as long as the gist of the present invention is not impaired. .

  Examples of the polymer having fiber forming ability include polyamide polymers formed by the reaction of carboxylic acid or carboxylic acid chloride and amine. Specifically, nylon 6, nylon 7, nylon 9, nylon 11, nylon 12, nylon 6,6, nylon 4,6, nylon 6,9, nylon 6,12, nylon 5,7 and nylon 5,6 etc. Can be mentioned. In addition, a polyamide polymer composed of other aromatic, aliphatic, and alicyclic dicarboxylic acids and aromatic, aliphatic, and alicyclic diamine components may be used as long as the spirit of the present invention is not impaired. One compound such as an aliphatic group or an alicyclic group may have an aminocarboxylic acid compound having both a carboxylic acid and an amino group, or the third and fourth copolymerization components may be copolymerized. It may be a polyamide polymer.

  Moreover, as a polymer which has the said fiber formation ability, the polyester-type polymer formed by esterification reaction of carboxylic acid and alcohol can be mentioned, for example. Specifically, examples of the polyester polymer used in the present invention include a polymer formed from an ester bond of a dicarboxylic acid compound and a diol compound. As such a polymer, a polyester whose main repeating structural unit is ethylene terephthalate, trimethylene terephthalate, tetramethylene terephthalate, ethylene naphthalate, propylene naphthalate, tetramethylene naphthalate or cyclohexanedimethanol terephthalate, or an aromatic hydroxycarboxylic acid And a liquid crystal polyester having a melt liquid crystallinity mainly composed of.

  Although not particularly limited, the polyester polymer formed from the ester bond of the dicarboxylic acid compound and the diol compound may be copolymerized with other components as long as the gist of the present invention is not impaired. For example, a dicarboxylic acid compound can be copolymerized. Examples of the dicarboxylic acid compound include terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, diphenyldicarboxylic acid, anthracene dicarboxylic acid, phenanthrene dicarboxylic acid, diphenyl ether dicarboxylic acid, diphenoxyethanedicarboxylic acid, diphenylethanedicarboxylic acid, adipic acid, sebacic acid, 1,4-cyclohexanedicarboxylic acid, 5-sodium sulfoisophthalic acid, 5-tetrabutylphosphonium isophthalic acid, azelaic acid, dodecanedioic acid, hexahydroterephthalic acid, aromatic, aliphatic, alicyclic dicarboxylic acids and their Mention may be made of derivatives, adducts, structural isomers and optical isomers such as alkyl, alkoxy, allyl, aryl, amino, imino, halide and the like. One of these dicarboxylic acid compounds may be used alone, or two or more thereof may be used in combination as long as the spirit of the present invention is not impaired.

  A diol compound can be copolymerized as the copolymer component of the polyester polymer. Examples of the diol compound include ethylene glycol, propylene glycol, tetramethylene glycol, pentanediol, hexanediol, 1,4-cyclohexanedimethanol, neopentyl glycol, hydroquinone, resorcin, dihydroxybiphenyl, naphthalenediol, anthracenediol, phenanthrenediol, Aromatic, aliphatic and alicyclic diol compounds such as 2,2-bis (4-hydroxyphenyl) propane, 4,4'-dihydroxydiphenyl ether, bisphenol S and their alkyl, alkoxy, allyl, aryl, amino, imino And derivatives such as halides, adducts, structural isomers and optical isomers. One of these diol compounds may be used alone, or two or more thereof may be used in combination as long as the gist of the present invention is not impaired.

  Moreover, as a copolymerization component of a polyester-type polymer, the compound which has a hydroxyl group and carboxylic acid in one compound, ie, hydroxycarboxylic acid, can be mentioned. Examples of the hydroxycarboxylic acid include lactic acid, 3-hydroxypropionate, 3-hydroxybutyrate, 3-hydroxybutyrate valerate, hydroxybenzoic acid, hydroxynaphthoic acid, hydroxyanthracenecarboxylic acid, hydroxyphenanthrenecarboxylic acid, Aromatic, aliphatic, and alicyclic hydroxycarboxylic acid compounds such as (hydroxyphenyl) vinylcarboxylic acid and their derivatives, adducts, structural isomers and optics, such as alkyl, alkoxy, allyl, aryl, amino, imino, and halides An isomer can be mentioned. These hydroxycarboxylic acids may be used alone or in a combination of two or more without departing from the spirit of the present invention.

  In addition, the polyester polymer may be a polymer in which one compound such as aromatic, aliphatic, and alicyclic is mainly composed of a hydroxycarboxylic acid compound having both a carboxylic acid and a hydroxyl group. Examples of the polymer composed of hydroxycarboxylic acid include polyesters having hydroxycarboxylic acid as a main repeating structural unit such as lactic acid, 3-hydroxypropionate, 3-hydroxybutyrate, and 3-hydroxybutyrate valerate. Can do. In addition, as these hydroxycarboxylic acids, aromatic, aliphatic, and alicyclic dicarboxylic acids, or aromatic, aliphatic, and alicyclic diol components may be used as long as the gist of the present invention is not impaired. Alternatively, a plurality of kinds of hydroxycarboxylic acids may be copolymerized.

  In addition, the polymer having the fiber-forming ability includes a polycarbonate polymer formed by transesterification of alcohol and a carbonic acid derivative, a polyimide polymer formed by cyclization polycondensation of carboxylic acid anhydride and diamine, and dicarboxylic acid. Examples thereof include polybenzimidazole polymers formed by the reaction of esters and diamines. In addition to polymers such as polysulfone polymers, polyether polymers, polyphenylene sulfide polymers, polyether ether ketone polymers, polyether ketone ketone polymers, aliphatic polyketones, cellulose polymers, chitin, chitosan and Examples thereof include polymers derived from natural polymers such as derivatives thereof.

  As the polymer having fiber forming ability, a polyester-based polymer is preferable in that the interfacial adhesiveness with the CB-containing PTT is good and peeling does not easily occur. The main repeating structural unit is, for example, ethylene terephthalate, trimethylene terephthalate, tetra Examples include methylene terephthalate, ethylene naphthalate, trimethylene naphthalate, tetramethylene naphthalate, polycyclohexanedimethanol terephthalate, and lactic acid. Polytrimethylene terephthalate, the main repeating structural unit of which is composed of the same trimethylene terephthalate as the CB-containing PTT, is particularly preferred because of its particularly good interfacial adhesion. In addition, polyesters having ethylene terephthalate, ethylene naphthalate, trimethylene naphthalate, and tetramethylene naphthalate as the main repeating structural unit are used in that the resulting fiber has a high elastic modulus or strength and can be used in various applications. Particularly preferred.

  And in the fiber of this invention, the polymer which has the fiber formation ability chosen from the above may be used individually by 1 type, and multiple types may be used together in the range which does not impair the meaning of this invention.

The carbon black contained in the polyester in which the main repeating structural unit in the present invention is composed of trimethylene terephthalate is preferable, for example, carbon black obtained by the furnace method (hereinafter referred to as furnace black), by the Ketjen method. The resulting carbon black (hereinafter referred to as ketjen black), carbon black made from acetylene gas (hereinafter referred to as acetylene black), graphite, carbon fiber, etc. are preferably used. Chain black and acetylene black are preferred. These carbon blacks need to have conductivity, and it is important that the conductivity of the carbon black is 5000 [Ω · cm] or less as a specific resistance value. A particularly preferable specific resistance range is 1.0 × 10 ^{−6 to} 500 [Ω · cm]. Here, the specific resistance value is obtained by measurement by the method of the E term in the examples described later. Further, since it is preferable not to impair the physical properties of the fiber when it is contained in the fiber of the present invention, and it is preferable not to aggregate, the size of the conductive carbon black particles is in the range of 1 to 500 nm in terms of average particle size. The thing of the range of 5-400 nm is more preferable. Here, the average particle diameter is determined by the method of item J in the examples described later. And the content of CB in the polyester in which the main repeating structural unit is composed of trimethylene terephthalate is high as a fiber even when CB is contained at a higher concentration than conventional PET polyester or PBT polyester. And the physical properties such as strength and elongation of the fiber when it has conductivity are preferably 15% by weight or more and 50% by weight or less, and preferably 16% by weight or more and 40% by weight. % Or less, more preferably 16% by weight or more and 35% by weight or less. Here, as the content of CB, one measured by the method of the L term in the examples described later is adopted.

  In the present invention, as a method for adding CB to a polyester whose main repeating structural unit is composed of trimethylene terephthalate, an arbitrary addition of an additive to a polyester (PTT polyester) whose main repeating structural unit is composed of trimethylene terephthalate This method can be adopted. Specifically, (A) a method in which PTT polyester is melted in an inert gas atmosphere, CB is added, and the mixture is kneaded under normal pressure or reduced pressure by a kneader such as an extruder or a static kneader, B) In an inert gas atmosphere, PTT polyester and CB are dry blended at a predetermined ratio in advance. Preferably, PTT polyester powder or granules are dry blended with CB and then melted. A method of kneading under normal pressure or reduced pressure using a kneader such as an extruder or a stationary kneader, and (C) conductive carbon at an arbitrary stage before the polymerization reaction is stopped in a normal PTT polyester polymerization reaction. And a method of kneading with black. The method (A) or (B) is preferably employed because kneading can be easily achieved and the conductive carbon black and the PTT polyester component are kneaded more finely. In particular, regarding the extruder, although a uniaxial or biaxial or more multiaxial extruder can be suitably used, the conductive carbon black is kneaded finely when the PTT polyester component and CB are kneaded. It is preferable to employ the above multi-axis extruder. The ratio l / w between the length (l) of the extruder shaft and the thickness (w) of the shaft is preferably 10 or more and preferably 20 or more in terms of improving kneadability. More preferably, it is still more preferably 30 or more. The larger the value of l / w, the longer the time required for kneading and the better the kneadability. However, if l / w is excessively large, the residence time becomes too long and the PTT polyester deteriorates. Therefore, the l / w is preferably 100 or less. In addition, as described above, CB may be added by dry blending before being supplied to the extruder, or may be mixed with the molten PTT polyester and the extruder using a side feeder provided in the extruder. . In particular, with respect to the static kneading element, for example, the operation of dividing the flow path of the melted PTT polyester into two or more and reuniting (one operation from this division to unity is one step. The stationary kneading element is not particularly limited as long as it is a stationary kneading element, but the number of stages of the stationary kneading element is preferably 5 or more in that the kneadability is more excellent. It is more preferable that Further, although it depends on the required length of the flow path, if it is excessively long, it may not be incorporated into the process, so the upper limit is preferably 50 stages or less.

  As the polyester having a main repeating structural unit, which is preferable for the fiber of the present invention, composed of trimethylene terephthalate, or a polymer having the above-mentioned fiber-forming ability, a polymer having a viscosity used for a synthetic fiber can be usually used. For example, for a polyester polymer, if it is a PET polyester, the intrinsic viscosity (IV) is preferably 0.4 to 1.5, and more preferably 0.5 to 1.3. Moreover, if the main repeating structural unit is polyester (PTT polyester) composed of trimethylene terephthalate, the intrinsic viscosity (IV) is preferably 0.7 to 2.0, and 0.8 to 1.8. It is more preferable that Or if it is PBT-type polyester, it is preferable that intrinsic viscosity (IV) is 0.6-1.5, and it is more preferable that it is 0.7-1.4. For example, if the polyamide polymer is nylon 6, the intrinsic viscosity [η] is preferably 1.9 to 3.0, and more preferably 2.1 to 2.8. These intrinsic viscosities (IV) or intrinsic viscosities [η] can be obtained by the method of item K in the examples described later.

  In addition, the melt viscosity of the polyester in which the main repeating structural unit of the present invention is composed of trimethylene terephthalate may be appropriately set depending on the amount of CB to be added and the structure of the fiber, but the polyester in a state containing CB. As for the melt viscosity, a polymer having a shear viscosity of 12.16 [1 / sec] and a shear viscosity of 10 to 100,000 [Pa · sec] is usually used at the melt spinning temperature, preferably 50 to 10 000 [Pa · sec]. Here, as the melt viscosity, one measured by the method of item F in the examples described later is adopted.

  Since the fiber of the present invention may be exposed to high temperatures depending on the environment during use, it has excellent heat resistance, so that the shrinkage rate when held in the atmosphere at 160 ° C. for 15 minutes (dry heat shrinkage rate). Is preferably 20% or less, and particularly preferably 10% or less. The shrinkage rate is preferably as low as possible, and those up to 0% are suitably used. Here, as the shrinkage rate, a value measured by the method of item G in the examples described later is adopted.

  The fiber of the present invention preferably has a residual elongation of 5 to 100%, and preferably 30 to 50% in terms of small deformation during use in various uses such as apparel and brush rollers described later. It is particularly preferred. Here, as the residual elongation, one measured by the method of item B in the examples described later is adopted.

  The fiber of the present invention may have an initial tensile elastic modulus of 15 to 80 cN / dtex in terms of being widely applicable to various uses, although the physical properties of the fiber may be appropriately controlled according to various uses. In addition, it can be stably produced in this range. In addition, there is an initial tensile elastic modulus which is considered to be more preferable depending on a specific application. For example, it is used for scraping off a colorant such as a toner as a member of a cleaning device incorporated in an electrophotographic apparatus as described later. In such a case, fibers having high rigidity (highly correlated with the initial tensile elastic modulus) are generally preferred, and the initial tensile elastic modulus is 45 to 80 cN / dtex in terms of good scraping property. Is more preferable, and 50 to 80 cN / dtex is particularly preferable. In order for the initial tensile elastic modulus to be 45 cN / dtex or more, which is preferable for use as a member of a cleaning device incorporated in an electrophotographic apparatus, the main repeating structural unit containing CB is tricyclic. A fiber-forming ability other than CB-containing PTT in that a higher initial tensile elastic modulus can be achieved when it is constituted as a fiber comprising polyester (CB-containing PTT) composed of methylene terephthalate as at least a part of the structural unit. It is preferable to form a fiber using, for example, a PET polyester having ethylene terephthalate as a main repeating structural unit or a PEN polyester having ethylene naphthalate as a main repeating structural unit. In addition, when a charging device member incorporated in an electrophotographic apparatus, which will be described later, is used as a member for applying a charge to the photosensitive member, a toner is electrostatically applied by applying a voltage to the cleaning device member. In general, fibers having low rigidity (highly correlated with the initial tensile elastic modulus) are preferred, and the initial tensile elastic modulus is 15 to 45 cN / dtex. It is preferably 15 to 40 cN / dtex, more preferably 15 to 35 cN / dtex. In this case, the lower the initial tensile elastic modulus, the better. Here, in order to reduce the initial tensile elastic modulus to 45 cN / dtex or less, the CB-containing PTT itself can be designed as it is because the initial tensile elastic modulus is low, and a lower initial tensile elastic modulus can be achieved. In view of this, it is preferable to form a fiber using a PTT polyester having trimethylene terephthalate as a main repeating structural unit or a PBT polyester having tetramethylene terephthalate as a main repeating structural unit. Here, as the initial tensile elastic modulus, one measured by the method of item B in the examples described later is adopted.

  The fiber of the present invention preferably has a breaking strength of 1.0 cN / dtex or more in order to stably satisfy the shape or characteristics for various uses such as clothing and brush roller described later. It is more preferably dtex or more, and further preferably 2.0 cN / dtex or more. Normally, fibers made of only polyester resins containing CB at a high concentration in order to produce highly conductive fibers are essentially stable when using conventional PET polyesters or PBT polyesters. It was difficult to obtain fibers, and even if fibers could be formed, the breaking strength was very low (less than 1.0 cN / dtex), and the breaking strength was increased no matter what means was used. Was difficult. However, when using a polyester component in which the main repeating unit is trimethylene terephthalate as the polyester, the present inventors can obtain a fiber having a particularly high breaking strength even if CB is contained in a high concentration. I found out that The higher the breaking strength, the better. However, in consideration of productivity, a material having a breaking strength of 10.0 cN / dtex or less is preferably produced. Here, as the breaking strength, the one measured by the method of item B in the examples described later is adopted.

In the polyester fiber of the present invention, the average resistivity is 1.0 × 10 ¹² [Ω / cm] or less. In the range of the average resistivity, various fiber products as described later, for example, clothing, wiring objects such as actuators and heating elements, fiber brushes or fiber brush rollers made of them, or various products incorporating them. Desired conductivity is imparted. The smaller the average resistivity is, the higher the conductivity is, that is, the easier it is to conduct electricity. Therefore, it is necessary to have a low average resistivity depending on the application, but the conductive agent that can be contained in the CB-containing PTT to the maximum. In view of this amount, the lower limit of the average resistivity is 1.0 × 10 ⁰ [Ω / cm]. In particular, when the fibers of the present invention are used in a brush roller incorporated in an electrophotographic apparatus as described later, the average resistivity is in the range of 1.0 × 10 ^{3 to} 1.0 × 10 ¹² [Ω / cm]. Preferably, conductive fibers having an average resistivity in a range as described later are employed according to the characteristics of the member and apparatus used for the brush roller. In addition, a wiring object such as a heating element is formed into a desired shape after becoming a woven fabric or a knitted fabric, but may be appropriately set according to a target applied voltage or current value, but 1.0 × 10 ^1. It is preferable that the average resistivity is in a range of ˜1.0 × 10 ⁷ [Ω / cm]. Here, as the average resistivity P, one measured by the method of item C in the examples described later is adopted.

Further, since the fibers of the present invention preferably have stable conductivity for various uses as described later, the ratio R (R = Q / R) of the average resistivity P and the standard deviation Q of the resistivity. P) is preferably 0.5 or less, more preferably 0.4 or less, and particularly preferably 0.3 or less. The smaller the ratio R, the smaller the conductive spots in the longitudinal direction of the fiber, meaning that it has a stable and excellent conductivity. When the above-mentioned average resistivity of the conductive fiber is less than 1.0 × 10 ⁸ [Ω / cm], the ratio R is particularly preferably 0.2 or less. Further, the ratio R is preferably as small as possible as described above, and can usually take a value up to 0.001, or can take a value of 0.001 or less when there is no conductive patch in the longitudinal direction of the fiber. Here, as the ratio R, one measured by the method of item C in the examples described later is adopted.

  Furthermore, the fiber of the present invention has a temperature and humidity change, specifically, the performance of the conductive fiber is good even in a wet climate such as the rainy season or in a dry climate such as winter. It is preferable that nothing changes. Therefore, the average resistivity X [Ω / cm] of the conductive fiber at medium temperature and medium humidity (23 ° C. humidity 55%) and the average resistivity Y [Ω / cm] at low temperature and low humidity (10 ° C. humidity 15%). ] Z (Z = Y / X) is preferably in the range of 1-5, more preferably in the range of 1-4, and particularly preferably in the range of 1-2. The closer Y / X is to 1, the smaller the difference between medium and intermediate humidity and low temperature and low humidity, that is, an excellent fiber with less temperature and humidity dependency. It should be noted that the stability of the conductivity in the temperature and humidity change that could not be obtained by the conventional CB content in the polyamide fiber, and the high concentration carbon black content that was impossible with conventional polyesters such as PET and PBT. This is possible for the first time by using a PTT polyester as in the present invention. Here, as the ratio of the average resistivity, the ratio measured by the method of D term in the examples described later is adopted.

The fiber of the present invention preferably has a specific resistance value of 10 ⁶ to 10 ⁹ [Ω · cm] in that the fiber can be processed more efficiently when it is made into a short fiber and electroflocking. More preferably, it is 10 ⁷ to 10 ⁸ [Ω · cm]. And in order to make these short fibers which have the value of the specific resistance value considered preferable, it is preferable to process with a conductive preparation agent etc. Examples of the conductive preparation agent include an aqueous solvent or an organic solvent in which silica-based particles are mixed. As the particle size of the silica-based particles, particles having a size of usually 1 nm to 200 μm are used. A particle size of 3 nm to 100 μm is preferable. Here, as the specific resistance value, one measured by the method of the E term in the examples described later is adopted.

  The fiber of the present invention is a matting agent, a flame retardant, a lubricant, an antioxidant, an ultraviolet absorber, an infrared absorber, a crystal nucleating agent, a fluorescent whitening agent, and a terminal group sealing agent as long as the gist of the present invention is not impaired. A small amount of such additives may be retained. Moreover, when the fiber of this invention is a composite fiber as above-mentioned, these additives may be hold | maintained in either the polymer which has fiber formation ability other than this CB containing PTT and / or this CB containing PTT. .

  Further, in the present invention, the polymer having fiber forming ability may contain CB and / or other conductive agent within the range not impairing the gist of the present invention. Here, in order not to impair the purpose, since the polymer having fiber forming ability does not function as a component mainly responsible for conductivity while containing CB and / or other conductive agent, the polymer having fiber forming ability is not included. It is important that the specific resistance value of only the portion is larger than the specific resistance value of the CB-containing PTT portion of the present invention.

  Hereafter, the preferable manufacturing method of the fiber of this invention is illustrated.

  The fiber of the present invention can be produced by employing various synthetic fiber spinning methods such as melt spinning, dry spinning, wet spinning, or solution spinning such as dry and wet spinning. However, it is easy and possible to contain CB at a high concentration in a polyester composed of trimethylene terephthalate whose main repeating structural unit arranged in the fiber, and the fiber shape can be precisely controlled. It is preferably produced by melt spinning. Then, the CB-containing PTT is blended with the above-mentioned polymer having fiber-forming ability and melt-spun, or the CB-containing PTT and polymer having fiber-forming ability are compound-spun, or the CB-containing PTT is melt-spun alone. To get the fiber.

  The melt-discharged fiber is cooled to a temperature equal to or lower than the lower glass transition temperature (Tg) of the polymer component (CB-containing PTT or polymer having fiber-forming ability) to form the fiber, or the treatment agent is not attached to the fiber. After the treatment agent is adhered, the sample is taken up at a take-up speed of 100 to 10,000 m / min, preferably 4000 m / min or less, more preferably 3000 m / min or less, and even more preferably 2500 m / min or less. Further, taking productivity into consideration, the take-up speed is 100 m / min or more, preferably 500 m / min or more. Since the polyester in which the main repeating structural unit used in the present invention is composed of trimethylene terephthalate may be inferior in process stability when taken at an excessively high take-up speed, the most preferred take-up speed is 500 to 2500 m / The range of minutes.

  Here, the number of bundles of fibers discharged from the cap hole (the number of fibers of the yarn) may be appropriately selected according to the intended usage or application, even in the state of one monofilament, A multifilament composed of a plurality of 3,000 or less yarns may be used. However, 2 to 500 fibers are preferable, and 3 to 400 fibers are particularly preferable in that fibers with stable physical properties can be obtained and suitably used for various applications. Further, the treatment agent to be adhered can be appropriately used depending on the use of the fiber, and although a water-containing or non-water-containing treatment agent can be adopted here, the photosensitive agent of the electrophotographic apparatus using the fiber of the present invention. In order to prevent the body from being deteriorated, it is preferable that no compound which causes deterioration of the photoreceptor is contained.

  As described above, after the fiber is taken up without being wound or once wound, the lower glass transition temperature (Tg) of the polymer components (CB-containing PTT or polymer having fiber forming ability) constituting the fiber. Heat to a temperature of + 100 ° C. or lower, preferably the glass transition temperature Tg −20 ° C. of the lower glass transition temperature to Tg + 80 ° C. of the higher glass transition temperature, and the residual elongation of the drawn yarn Is a magnification at which the residual elongation of the drawn yarn is 30 to 50%, that is, a draw ratio in the range of 1.1 to 3.0 times. Apply. Here, after stretching once (that is, after finishing the first stage stretching), the second stage stretching may be performed at a magnification of 1 to 2 times.

  After stretching, the fiber is preferably heat-treated at a temperature not lower than the final stretching temperature and not higher than the melting point (Tm). By performing heat treatment at a high temperature after stretching, the heat resistance is higher, and the ratio R (R = Q / P) between the above-described average resistivity P and resistivity standard deviation Q is low, and the electrical conductivity in the longitudinal direction of the fiber It is possible to make excellent fibers with small sexual spots. Here, as Tg and Tm, those measured by the method of the H term in Examples described later are adopted.

  Furthermore, before or after the heat treatment, it is preferable to perform a relaxation treatment by contracting the fiber very slightly at a magnification of 0.9 times or more and less than 1.0 times. This also makes it possible to obtain an excellent fiber having a low ratio R (R = Q / P) between the above-described average resistivity P and the standard deviation Q of the resistivity, and a small conductive spot in the longitudinal direction of the fiber.

  Examples of the stretching method or the heat treatment method after stretching include a contact heater such as a heated pin-like object, a roller-like object, and a plate-like object, a contact bath using a heated liquid, or a heated gas, heated steam, and electromagnetic wave. It is possible to employ a non-contact type heating medium using the like. Among these, contact type heaters such as heated pin-like objects, roller-like objects, and plate-like objects, and contact-type baths using heated liquids are preferred because the apparatus is simple and the heating efficiency is high, and are heated. A roller-like material is particularly preferable.

  The fiber of the present invention can be used as a woven fabric or a knitted fabric, and may be subjected to false twisting when used for various clothing applications. In the false twisting process, the fiber is heated without heating the drawn yarn or undrawn yarn or with a heated pin-like product, roller-like product, plate-like product, non-contact type heater, etc. It is false twisted with a belt-like material. The drawn false twisted fiber is preferably wound as it is or after being heat set, although not particularly limited. The fiber of the present invention may be twisted instead of the false twisting.

  The polyester fiber of the present invention can be used as a normal fiber product such as woven fabric, knitted fabric, and non-woven fabric, as well as fiber brushes, clothing, rugs, flocked bodies using short fibers, or electricity flow. It can be made into the polyester fiber product used for at least one part in a simple wiring thing. Specifically, it will be described in detail below.

  The polyester fiber of the present invention can be made into a woven fabric that is used at least in part or in whole according to the use or shape that can be used. Here, for example, single woven fabrics include plain weaves such as broad, voile, lawn, gingham, tropical, taffeta, shantung and desin, twills such as denim, surge and gabardine, satin weaves such as satin and doskin, baskets, panama and mats. , Nanako weaves such as Hopsack, Oxford, woven fabrics such as Grosgrain, Ottoman, Hair Cord, steep slashes such as French Aya, Herringbone, Broken Twill, sloppy, Yamagata slash, tear slash, flying slash Examples include curving, ornamental, irregular vermilion, layered vermilion, vermilion vermilion, vermilion vermilion, day / night vermilion, honeycomb, hack weaving, pear weaving, and Niagara. In addition, double woven fabrics such as picket and puffer weaves, double weft fabrics such as Bedford cord, double weft fabrics such as air-weaving fabrics and bag weaves. Examples include weaving. In addition, examples of pile fabrics include weft pile weaves such as benji and corten, and warp pile weaves such as towels, velvet and velvet. In addition, woven fabrics such as woven fabrics and woven fabrics, and crested fabrics such as dobby and jacquard fabrics can be used. In particular, a pile fabric made of warp pile weave is preferable for use in a fabric for a fiber brush described later. The form of the polyester fiber of the present invention used for producing the woven fabric can be any form such as raw yarn, twisted yarn, false twisted yarn, long fiber (filament), or short fiber (staple). There is no particular limitation.

  In addition, the polyester fiber of the present invention can be made into a knitted fabric that is used at least in part or in whole in accordance with the use or shape that can be used. The knitting here includes plain knitting such as tengu and single, rib knitting such as rubber knitting and milling, pearl knitting such as lynx, kanoko, pear fabric, accordion knitting, small pattern, lace knitting, fleece knitting, one-sided knitting Knitting, weft knitting, ripples, Milan ribs, double pickets, etc., and warp knittings such as tricot, russell, miranese, etc. A knitted fabric or a knitted fabric which has been subjected to raising treatment for protruding pile-like fibers on the surface of the knitted fabric is preferable. The form of the polyester fiber of the present invention used for producing the knitted fabric can be any form such as raw yarn, twisted yarn, false twisted yarn, long fiber (filament), or short fiber (staple). There are no particular restrictions.

  Further, the polyester fiber of the present invention can be made into a non-woven fabric that is used at least in part or in whole, in accordance with the intended use or shape. Here, examples of the nonwoven fabric include those formed by a bonding or adhesion method such as a chemical bond method, a thermal bond method, a needle punch method, a water jet punch (spun lace) method, a stitch bond method, and a felt method. The form of the polyester fiber of the present invention used for producing the nonwoven fabric can be any form such as raw yarn, twisted yarn, false twisted yarn, long fiber (filament), or short fiber (staple). There is no particular limitation.

  The aforementioned woven fabric or knitted fabric in which the polyester fiber of the present invention is used at least in part may be subjected to processing such as scouring, dyeing, and heat setting according to a conventional method. Or if it is the above-mentioned nonwoven fabric, in addition to the above-mentioned scouring, dyeing, heat setting, etc., physical processing such as glazing press, embossing press, compact processing, flexible processing, heat setting, bonding processing, laminating processing, coating Chemical treatment processing such as processing, antifouling processing, water repellent processing, antistatic processing, flameproof processing, insect repellent processing, sanitary processing, foam resin processing, and other applications such as microwave application, ultrasonic application, far infrared application, Application processing such as ultraviolet ray application and low temperature plasma application may be performed.

  Moreover, as the above-mentioned woven fabric, knitted fabric, or non-woven fabric in which the polyester fiber of the present invention is used at least in part, the polyester fiber of the present invention, synthetic fibers different from the present invention, semi-synthetic fibers, natural fibers, For example, it may be one using at least one kind of fiber selected from cellulose fiber, wool, silk, stretch fiber, and acetate fiber. Specifically, examples of the cellulose fiber include natural fibers such as cotton and hemp, or copper ammonia rayon, rayon, polynosic and the like. Regarding the content of the polyester fiber of the present invention mixed with these cellulose fibers, Although there is no particular limitation, 0.1 to 50% by weight is preferable in order to make use of the texture, hygroscopicity, water absorption, antistatic property and the like of the cellulose fiber and to make use of the conductivity of the fiber of the present invention. In addition, existing wool and silk used for the blending can be used as they are, and the content of the polyester fiber of the present invention mixed with the wool or silk is determined by the texture, warmth, bulkiness of the wool, silk In order to make use of the texture and squeak noise and to make use of the conductivity of the polyester fiber of the present invention, 0.1 to 50% by weight is preferable. The stretch fiber used for mixing is not particularly limited, and is a dry-spun or melt-spun polyurethane fiber, as well as polytrimethylene terephthalate fiber, polytetramethylene terephthalate fiber, or polytetramethylene glycol copolymer. Examples thereof include polyester-based stretch fibers represented by polytetramethylene terephthalate fiber. In the mixed fabric using these stretch fibers, the content of the polyester fiber of the present invention is preferably about 0.1 to 50% by weight. The acetate fiber used for mixing is not particularly limited, and may be diacetate fiber or triacetate fiber. The content of the fiber of the present invention mixed with these acetate fibers is the texture, sharpness, and gloss of the acetate fibers. In order to make the best use of the conductivity of the polyester fiber of the present invention, 0.1 to 50% by weight is preferable.

  For these various woven fabrics, knitted fabrics, and nonwoven fabrics, the form of the polyester fiber of the present invention and the mixing method are not particularly limited, and known methods can be used. For example, mixed methods include woven fabrics such as union woven fabrics and reversible fabrics used for warp or weft yarns, knitted fabrics such as tricot and russell, and other knitting, doubling, and entanglement may be performed.

  The woven fabric, knitted fabric or non-woven fabric using the polyester fiber of the present invention at least partly or entirely may be dyed, including those mixed as described above. In particular, in the case of knitting, weaving, or non-woven fabric, it is preferable to take a scouring, presetting, dyeing, and final setting process by a conventional method after forming a web and forming by the above-described joining or adhesion method. Further, when the polyester fiber of the present invention is not only the above-mentioned CB-containing PTT, but also a polymer having a fiber forming ability other than the CB-containing PTT is a polyester polymer and forms a part of the fiber surface, it is necessary. Accordingly, alkali reduction may be performed by a conventional method after scouring and before dyeing. The scouring is preferably performed in a temperature range of 40 to 98 ° C. In particular, in the case of mixed use with stretch fibers, it is more preferable to scour the fabric while relaxing because it improves elasticity. One or both of the heat sets before and after dyeing can be omitted, but it is preferable to carry out both in order to improve the form stability and dyeability of the woven fabric, knitted fabric or nonwoven fabric. The heat setting temperature is 120 to 190 ° C., preferably 140 to 180 ° C., and the heat setting time is 10 seconds to 5 minutes, preferably 20 seconds to 3 minutes.

  Since the polyester fiber of the present invention is excellent in conductivity, it is very useful as a fiber itself. As one form of the fiber, it is used as a short fiber having a length of 0.05 to 150 mm as described above. The short fiber is formed by cutting the filament into a single yarn or a tow in which a plurality of yarns are bundled. Particularly, the short fiber having a length of 0.1 to 10 mm is, for example, By various methods such as electric flocking and spraying, a flocked body planted on the base can be obtained. In the electric flocking body, 50% or more of the fibers planted by the flocking process are planted in a generally upright state from 10 degrees to perpendicular (that is, 90 degrees) to the base. Here, within the range which does not impair the meaning of this invention, the short fiber used when it becomes this flocked body consists of other fibers which are not the polyester fiber of this invention other than the short fiber which consists of the polyester fiber of this invention. Short fibers may be mixed and planted. The flocked body may be planted by bonding short fibers to the base. In the case of bonding, it is preferable that the flocked body is bonded using, for example, an acrylic, urethane, or ester adhesive. Here, the thickness of the adhesive layer is preferably 1 to 500 μm, and a single layer or, if necessary, a plurality of types of adhesives may be mixed or divided into a plurality of layers. Further, the base to be planted is not particularly limited, and may be appropriately selected according to the device for incorporating the flocked body and the adhesive used, but synthetic resin, natural resin, synthetic fiber, natural fiber, wood, Films, sheets, paper, plates, fabrics, etc. made of minerals or metals can be suitably used, or even if directly implanted on the base of a metal processed body, synthetic or natural resin processed body or molded body which is a member for various applications itself Good. In particular, in order to increase the affinity with the adhesive, a sheet made of a synthetic or natural resin or metal subjected to a hydrophilic treatment is preferable. And if this base | substrate is the raw material which forms the front and back, such as the said film, sheet | seat, paper, board, cloth, according to a use or the objective, it can plant on both surfaces of the surface and a back surface. The flocked body may be used by sticking to another base as a method of use or application, or may be used as a conductive fiber brush roller because it has the following conductivity, for example.

Specifically, a flocked body using at least a part of the short fibers made of the polyester fiber of the present invention can be formed and used as a fiber brush using at least a part. In particular, a fiber brush roller directly planted on a rod-like object is preferable. The short fiber used here may be sprayed with a short fiber by gas when implanted in a rod-like object, or may be subjected to electric flocking, but the one that is generally upright on the surface of the rod-like object is efficient. Since it is obtained, it is preferable to be obtained by electric flocking. At this time, 50% or more of the short fibers are bonded in a generally upright state from 10 degrees to the vertical (that is, 90 degrees) on the surface of the rod-like object. Here, within the range which does not impair the meaning of the present invention, the short fibers used are mixed with the short fibers made of the polyester fibers of the present invention and the short fibers made of other fibers which are not the polyester fibers of the present invention. May be. In addition, the adhesive for planting by adhesion is not particularly limited, and for example, an acrylic, urethane, or ester adhesive is selected and used depending on the application or purpose. The thickness of the agent layer is preferably 1 to 500 μm, and a single layer or, if necessary, a plurality of types of adhesives may be mixed or divided into a plurality of layers. Moreover, the specific resistance value of the fiber brush roller itself of the polyester fiber brush roller formed by using at least a part of the short fiber made of the polyester fiber of the present invention and being implanted in a rod-like object is 10 ² to 10 ¹¹ Ω · cm. It is preferable.

  The main material used for the core of the rod-shaped object described above may be any material suitable for the intended use or purpose, and may be selected from metals, synthetic resins, natural resins, wood, minerals, etc., alone or in combination. However, when used as a member to be incorporated in an electrophotographic apparatus described later, it is preferably made mainly of metal. Further, when the rod-shaped object is a metal, an intermediate layer covers the entire surface of at least a part of the metal or a necessary part, and the woven fabric and / or knitted fabric and / or the nonwoven fabric is adhered thereon, Or it is preferable that a short fiber adheres and is planted. The material used as the intermediate layer mainly provides cushioning properties to the rod-like object, or bears auxiliary elasticity / rigidity when it cannot be achieved only by the elasticity / rigidity of the brush-like fibers, which will be described later. For example, the toner removal performance in the cleaning device or the toner application performance in the developing device is significantly improved. Although not particularly limited, for example, a urethane material, an elastomer material, a rubber material, or an ethylene-vinyl alcohol material is preferably used for the intermediate layer. And it is preferable that the thickness of this intermediate | middle layer is 0.05-10 mm, Furthermore, the above-mentioned electroconductivity control agent or a magnetic control agent may be added as needed.

  The above-mentioned woven fabric, knitted fabric or non-woven fabric using at least a part of the polyester fiber of the present invention can be bonded to a base to form a fabric composite. In this case, if the woven fabric is pile weave or yarn ends due to pile weaving or treatment, and if it is a knitted fabric, there are pile-like fibers raised or raised and the pile or yarn ends are on the knitted surface In the polyester fiber brush roller described later, the function may be further enhanced, which is preferable. When bonding and forming at the time of joining, it is preferred to adhere using, for example, an acrylic, urethane, or ester adhesive. Here, the thickness of the adhesive layer is preferably 1 to 500 μm, and a single layer or, if necessary, a plurality of types of adhesives may be mixed or divided into a plurality of layers.

  Further, the substrate to be bonded is not particularly limited, and may be appropriately selected according to the apparatus incorporating the fabric composite and the adhesive used. However, synthetic resin, natural resin, synthetic fiber, natural fiber, wood Films, sheets, paper, boards, or other fabrics made of minerals or metals can be suitably used, or directly on the base of metal processed bodies, synthetic or natural resin processed bodies or molded bodies that are members for various uses. It may be glued. In particular, in order to increase the affinity with the adhesive, a sheet made of a synthetic or natural resin or metal subjected to a hydrophilic treatment is preferable. If the substrate is a material forming the front and back surfaces, such as the film, sheet, paper, board, or fabric, the fabric is formed by adhering the woven fabric, knitted fabric, or nonwoven fabric to both the front and back surfaces according to the purpose or purpose. Can be a composite. The fabric composite may be used by being attached to another substrate as its usage or application, or may be used as a conductive polyester fiber brush because it has the following conductivity, for example.

  The woven fabric and / or knitted fabric and / or non-woven fabric made of the polyester fiber of the present invention can be used at least in part or in all to form a polyester fiber brush. In particular, it is preferable to use a woven fabric in terms of stable form. The woven fabric and / or knitted fabric and / or non-woven fabric used here is the functionally required length (i.e., winding width) of the rod-shaped object when bonded to the rod-shaped object to form a polyester fiber brush roller. The cut material may be wound and joined in one round, or the material cut into a slit with a width that is a fraction of one-tenth of the length of the rod-like object is wound around the rod-like object in a spiral shape May be joined. When joining, it may fit by attaching unevenness to the rod-shaped substance in advance, but it is preferable to bond using an adhesive in terms of reliable joining.

The adhesive used here may be appropriately employed depending on the application or purpose, and various adhesives such as acrylic, ester or urethane may be employed, and conductive control agents such as CB and metal as required. Alternatively, a magnetic control agent such as a metal such as iron, nickel, cobalt, and molybdenum, an oxide of these metals, or a mixture thereof may be added. Here, the thickness of the adhesive layer is preferably 1 to 500 μm, and a single layer or, if necessary, a plurality of types of adhesives may be mixed or divided into a plurality of layers. Furthermore, the woven fabric and / or the knitted fabric and / or the non-woven fabric are made of a material such as a conductive treatment agent or a conductive sheet or a conductive film having a specific resistance of 10 ² to 10 ¹⁰ Ω · cm on the bonding surface before bonding. You may stick together.

  Since the polyester fiber of the present invention has stable conductivity and can be controlled to have a desired resistivity, a weak current can flow when a constant voltage is applied. Can be formed. By utilizing this, for example, an actuator that is controlled and driven by sending a signal with a weak current can be formed. At this time, the length of the fiber may be long fiber (filament) or short fiber as described above. Specifically, the actuator can transmit and drive a weak current, for example, the same as a human muscle as a signal, so that the fiber of the present invention can be used in an electric signal circuit of the actuator.

  Moreover, as an example of a wiring object, it can also be used and used as a heat generating body which uses the polyester fiber of this invention for at least one part or all. At this time, the length of the fiber may be long fiber (filament) or short fiber as described above. When it becomes a heating element, the fiber of the present invention is excellent in conductivity and can be designed to have the required average resistivity [Ω / cm], so that the applied voltage, target temperature, etc. A suitable heating element can be used. By applying a certain voltage, the polyester fiber of the present invention functions as a resistor and generates heat. When designing the heating element, it is preferable to use the polyester fibers of the present invention as warp yarns and / or weft yarns for every several yarns, for example, when a very small temperature increase is sufficient. Alternatively, when the area to be heated needs to be planar, when the polyester fiber of the present invention is used for warp or weft, increasing the number of the fibers tends to increase the surface and temperature, and in the extreme, warp and weft What is necessary is just to form a textile fabric using the fiber of this invention for all of these. A knitted fabric may be used instead of the woven fabric. As the heating element, when a voltage of 100 V is applied to both ends of the fiber or both ends of the fabric, a heating element that is heated at a temperature rising rate of at least 0.1 ° C./min can be used as a good heating element.

  The polyester fiber of the present invention can be used as a garment that is used at least in part or in whole. At this time, the length of the fiber may be long fiber (filament) or short fiber as described above. For example, when it is made into clothing, it is more comfortable to wear, such as being able to suppress the generation of static electricity in winter or when dry due to its excellent conductivity, or it is difficult to get dust close to it, so when manufacturing surgical clothing or semiconductors It can form dust-proof clothing such as work clothes. In that case, it is preferable to use the fiber of the present invention every several warp yarns and / or weft yarns. Further, as a secondary effect, the polyester fiber of the present invention contains a large amount of CB, so that the thermal conductivity of the fiber is improved, and a contact cold feeling material that takes heat instantly when wearing, or a cold exterior in winter It can be used as a warm material that warms your body as soon as you enter a warm room.

  The polyester fiber of the present invention can be used as a rug which is used at least in part or in whole. Examples of the rug include carpets, mats, flooring, and the like that are laid indoors and outdoors, and inside a vehicle. At this time, the length of the fiber may be long fiber (filament) or short fiber as described above. When it becomes a rug, it is more comfortable, for example, it can suppress the generation of static electricity during walking by being excellent in electrical conductivity, or it is difficult to attract dust, so it is also excellent in dust resistance and difficult to get dirty. When forming a rug, it is preferable to use several fibers of the present invention as warp yarns and / or weft yarns. As a secondary effect, the polyester fiber of the present invention is excellent in conductivity, and can be used as a heating material in winter or in a cold region in combination with the above-described embodiment as a heating element.

A woven fabric and / or a knitted fabric and / or a non-woven fabric using at least a part of the polyester fiber of the present invention, or a flocked body using at least a part of the short fiber. The polyester fiber brush roller used for at least a part is suitably used as a member of a cleaning device incorporated in an electrophotographic apparatus, for example, due to the conductivity of the polyester fiber of the present invention used. Here, the average resistivity P of the conductive fibers of the brush roller used in the cleaning device is 1.0 × 10 ⁵ [Ω / cm] or more and 1.0 × 10 ¹² [Ω / cm] or less, particularly 1.0. Those in the range of 10 ⁹ [Ω / cm] or more and 1.0 × 10 ¹² [Ω / cm] or less are preferably used according to the mechanism of the cleaning device. While the brush roller rotates in the cleaning device, while applying electricity if necessary, it captures unnecessary matter (for example, residual colorant (toner) that has not been transferred in the electrophotographic device). However, when the polyester fiber of the present invention is used, as described above, it is a fiber having a stable conductive performance even when there is a change in temperature and humidity. Therefore, this removal performance is remarkably excellent. It is. In addition, as described above, the polyester fiber brush roller is used in a cleaning device, as described above, in addition to the polyester fiber brush roller coming into direct contact with the photoreceptor for cleaning, the member for cleaning the photoreceptor (as described above, polyester In some cases, it is a fiber brush roller, or in the case of the prior art, as a brush roller for cleaning a blade-like member), that is, for cleaning the cleaning device itself, or for collecting the collected unnecessary colorant (toner). It is also used as a polyester fiber brush roller for transfer to a place. Further, the above-described cleaning apparatus may use one polyester fiber brush roller of the present invention, or two or more plural, depending on the purpose, effect, and cleaning mechanism.

A woven fabric and / or a knitted fabric and / or a non-woven fabric using at least a part of the polyester fiber of the present invention, or a flocked body using at least a part of the short fiber. The polyester fiber brush roller used for at least a part is derived from the conductivity of the polyester fiber of the present invention used, and is suitably incorporated and used in a charging device that can be used in an electrophotographic apparatus described later. The average resistivity P of the conductive fibers of the brush roller incorporated in the charging device is preferably in the range of 1.0 × 10 ⁶ [Ω / cm] to 1.0 × 10 ¹¹ [Ω / cm]. Used. The performance of the charging device using the brush roller depends on the conductive performance of the brush roller, i.e., the performance of the conductive fiber, but the environment within the electrophotographic apparatus as well as being able to uniformly charge the photosensitive body, which is the original purpose. It is required that the conductivity of the brush roller does not change at all with respect to changes, that is, changes in temperature and humidity that gradually change during operation of the electrophotographic apparatus, or changes in temperature and humidity due to the season. On the other hand, since the conductivity of the polyester fiber of the present invention does not change at all with respect to the above-mentioned environmental change, charging spots on the photoreceptor are less likely to occur, resulting in a very excellent charging device. In addition, even when there is residual toner on the surface of the photoreceptor of the electrophotographic apparatus due to insufficient cleaning, the brush roller is in a brush shape and can also serve as a cleaning roller. It is also excellent in that there is no or almost no contamination during printing. Furthermore, when the electrophotographic apparatus is downsized, it is possible to save space as a cleaning apparatus and a charging apparatus without separately installing the cleaning apparatus and the charging apparatus. Are better. In the charging device described above, one or a plurality of brush rollers may be used depending on the purpose and mechanism.

  A woven fabric and / or a knitted fabric and / or a non-woven fabric using at least a part of the polyester fiber of the present invention, or a flocked body using at least a part of the short fiber. The polyester fiber brush roller used for at least a part is derived from the conductivity of the polyester fiber of the present invention used, and is suitably incorporated in a developing device. In the later-described electrophotographic apparatus, the developing apparatus visualizes a latent image drawn by a laser on the surface of the photosensitive member uniformly charged by the charging apparatus. Since there is no change in the resistivity of the brush roller even when the environment changes, the toner to be visualized is uniformly supplied to the photoreceptor and visualized. It is much better because it is very beautiful with little or no.

A woven fabric and / or a knitted fabric and / or a non-woven fabric using at least a part of the polyester fiber of the present invention, or a flocked body using at least a part of the short fiber. The polyester fiber brush roller used for at least a part is derived from the conductivity of the polyester fiber of the present invention used, and is suitably incorporated and used in a static eliminator that can be used in an electrophotographic apparatus described later. The average resistivity P of the conductive fibers of the polyester fiber brush roller incorporated in the static eliminator is preferably in the range of 1.0 × 10 ³ [Ω / cm] to 1.0 × 10 ¹² [Ω / cm]. Used for. In particular, when used in an electrophotographic apparatus described later, the conductive fibers of the brush roller exhibit a stable and free surface neutralizing effect, and the cleaning effect of the cleaning device usually disposed after the static eliminating device is more effective. In addition to being able to be increased, when the electrophotographic apparatus is downsized, it can be incorporated as a static eliminator and a cleaning apparatus by using the brush roller, which is remarkably excellent.

  Specifically, as an electrophotographic apparatus using the cleaning device and / or charging device and / or developing device and / or static eliminator in which a fiber product using at least a part of the polyester fiber of the present invention is incorporated, A laser beam monochrome printer, a laser beam color printer, a monochrome or color printer monochrome copying machine using a light emitting diode, a color copying machine, a monochrome or color facsimile, a multifunctional multifunction machine, a word processor, and the like can be given. An apparatus that develops or prints a latent image with a laser and / or a light emitting diode on a charged photoreceptor and develops the image using toner, as described above, uses the polyester fiber of the present invention. It has stable cleaning, charging, developing, and static elimination performance regardless of environmental changes in the electrophotographic apparatus, especially temperature and humidity, and the obtained prints or developed products contain multiple types of toners as well as monochrome. In the case of a color used in a large amount, it becomes particularly beautiful, and it is possible to further increase the driving speed of the electrophotographic apparatus, that is, increase the printing or developing speed (number of sheets) per unit time. Further, as described above, the electrophotographic apparatus of the present invention using the fiber of the present invention can achieve further miniaturization, space saving, and power saving, which is very preferable.

As described above, the polyester resin composition according to the present invention has a specific resistance of 1.0 × at least as a constituent component comprising a polyester component whose main repeating unit is composed of trimethylene terephthalate and CB. It is a polyester resin composition having conductivity of 10 ⁴ [Ω · cm] or less. Even if the main repeating unit is a polyester component composed of trimethylene terephthalate, even if it contains CB at a high concentration, as described above, it forms fibers and is made of the resin composition such as a film or sheet. Also, in the case of various molded products such as injection molded products, unlike conventional polyesters such as PET polyester and PBT polyester, it is processed at a high shear rate of flow characteristics, particularly 500 [1 / second] or more. In this case, the processing stability is extremely excellent. Since the fluidity is excellent, a molded product having a stable shape can be obtained from the polyester resin composition of the present invention. Furthermore, for the obtained fibers, films, or other molded products, the brittleness of the resin itself is greatly improved while maintaining high conductivity and conductivity stability, and the incidence of defects such as cracking and scraping is extremely small. It has excellent mechanical properties as a molded article, and is suitably used for applications that require electrical conductivity or antistatic properties. Incidentally, although preferably used for a range of the ratio resistors are excellent in electrical conductivity as long as ^{1.0 × 10 4 [Ω · cm} ] or less, preferably a lower specific resistance, 1.0 × 10 ³ [Ω · cm] or less is more preferable, and 5.0 × 10 ² [Ω · cm] or less is particularly preferable. The lower the specific resistance value, the better the conductivity because it is excellent, but the polyester resin composition containing CB takes a value of 1.0 × 10 ⁻³ [Ω · cm] or more.

  The content of CB in the polyester resin composition is preferably 15% by weight or more and 50% by weight or less from the viewpoint of obtaining excellent conductivity, and more preferably 16% by weight or more and 40% by weight because of better conductivity and flow characteristics. It is more preferably 16% by weight or more and 35% by weight or less because it is very excellent in conductivity and various molded articles can be suitably produced. Here, as the content of the CB, one measured by the method of the L term in Examples described later is adopted.

  And as above-mentioned, this polyester resin composition is very excellent in a flow characteristic. In order to evaluate the flow characteristics, the melt viscosity may be measured at a high shear rate of 1216 [1 / second] by the method for measuring the F term in the examples described later. When measured at a measurement temperature of 1216 [1 / sec], the polymer does not contain CB at all (η0% 1 k [Pa · sec]) and CB-containing polymer (for example, X wt%) If the addition amount of conductive carbon black is (ηX% 1k [Pa · sec]), the ratio of each melt viscosity (ηX% 1k / η0% 1k) is calculated, and the ratio of melt viscosity is 1 ≦ ηX The conductive polyester resin composition is preferably% 1k / η0% 1k ≦ 1.5, more preferably 1 ≦ ηX% 1k / η0% 1k ≦ 1.3, and 1 ≦ ηX% 1k It is particularly preferable that /η0%1k≦1.2.

  EXAMPLES Hereinafter, the present invention will be described specifically and in detail with reference to examples, but the present invention is not limited only to these examples. In addition, the physical-property value in an Example was measured with the following method.

A. Measurement of Fineness [dtex] and Single Yarn Fineness [dtex] The fiber (multifilament) is crushed by 100 m in length, and the weight (g) of the crushed fiber is measured and multiplied by 100. The average value of three measurements obtained in the same manner was defined as the fineness of the fiber. Regarding the single yarn fineness, a value obtained by dividing the fineness by the number of single fibers constituting the filament was defined as a single yarn fineness [dtex].

B. Measurement of initial tensile elastic modulus, residual elongation, and breaking strength of fiber Tensilon tensile tester (TENSIRON UCT-100) manufactured by Orientec Co., Ltd., if it is an undrawn yarn, the initial sample length is 50 mm, and the tensile speed is 400 mm / min. In the case of a drawn yarn, the initial tensile elastic modulus (drawn yarn only), strength and residual elongation were measured at an initial sample length of 200 mm and a tensile speed of 200 mm / min, and the average value measured five times was used as each measured value. The initial tensile elastic modulus was recorded on chart paper as a chart speed of 100 cm / min and a stress full range of 500 g, and was determined from the slope of the initial tensile curve.

C. Measurement of the average resistivity P [Ω / cm] and the ratio R (R = Q / P) of the average resistivity P and the standard deviation Q of the resistivity. The measurement was carried out after maintaining at least one hour in the atmosphere. When running a yarn with a pair of mirror rollers consisting of a yarn feeding roller and a take-up roller, the running yarn is applied to a probe consisting of two rod terminals connected to an insulation resistance meter SM-8220 made by Toa DKK between the rollers. Is installed in such a manner that the rod thickness is 2 mm, the distance of the yarn contacting the rod terminal is 2.0 cm, the applied voltage is 100 V, the yarn feeding speed is 60 cm / min, and the yarn tension between the rollers is 0.05-0. The resistance value was measured by measuring the length of 120 cm at a sampling rate of 0.2 seconds with an insulation resistance meter so as to be in the range of 1 cN / dtex (in this range, there is no difference in the measured value). The average resistivity P [Ω / cm] was obtained by dividing the average [Ω] of the obtained values by the distance (2.0 cm) of the yarn contacting between the bar terminals. Further, after calculating the standard deviation Q of all the resistance values obtained at the same time, the ratio R (R = Q / P) of P and Q was calculated.

D. Ratio Z (Z = Y / X) of average resistivity between average resistivity X at medium temperature and medium humidity (23 ° C. humidity 55%) and average resistivity Y at low temperature and low humidity (10 ° C. humidity 15%) (temperature Humidity change Z)
For medium temperature and humidity, C.I. The measurement method of the item is adopted, and C.I. The average resistivity was obtained by measurement in the same manner as in the item, and the ratio Z (Z = Y / X) of the obtained average resistivity X and Y was obtained.

E. Measuring method of specific resistance value The measurement was carried out after holding the sample to be measured at the medium temperature and humidity for at least 1 hour in the atmosphere. When the object to be measured is a fiber having a length of 100 mm or more, the fiber bundle is made into a bundle of 1000 dtex and cut to a length of 50 mm (at this time, the fiber end face is cut obliquely), and the end face is electrically conductive. After applying the paste, an electrode was attached and measurement was performed at 500V. When the object to be measured is a fibrous or powdery material having a length of less than 100 mm, it is applied to an insulating box-shaped container having electrodes 10 cm long, 2 cm wide and 1 cm deep and having electrodes on both end faces. It was measured after filling and sealing with a pressure of 5 to obtain a specific resistance value [Ω · cm] per unit volume. For the gut-shaped one, two terminals of the tester are arbitrarily selected using a tester for a gut having a diameter D (with a diameter in the range of 0.2 to 0.3 cm) and a length of 12 cm in one measurement. Then, the resistance value R [Ω] was measured at an interval of 10 cm, and the specific resistance value of the gut was obtained from the equation of (specific resistance value) = R × (D / 2) ² × π / 10. . The specific resistance value was measured once for each of five different guts, and the average value of the five times was taken as the specific resistance value of the gut.

F. Measurement of Melt Viscosity Using Capillograph 1B manufactured by Toyo Seiki Co., Ltd., under a nitrogen atmosphere, with a barrel diameter of 9.55 mm, a nozzle length of 10 mm, and a nozzle inner diameter of 1 mm, a polymer extrusion piston speed of 1 mm / min (shear speed of 12.16 [1 / Second]) or 100 mm / minute (shear rate 1216 [1 / second]), and measurement was performed after 10 minutes passed immediately after sample filling. The average value of the values measured five times was taken as the melt viscosity at each shear rate.

G. Calculation of shrinkage rate (dry heat shrinkage) for 15 minutes in the atmosphere at 160 ° C. One clip is attached to a bundle obtained by scooping five rings of 1 m drawn yarn, and the length L1 of the bundle is measured (at this time, about 500 mm). Length). Next, it is slowly lowered into the atmosphere at 160 ° C. and left to stand for 15 minutes. After 15 minutes, it is taken out and air-dried for 1 hour or more. After air drying, the length L2 of the bundle is measured again. The shrinkage rate (%) is calculated by the following formula.
Dry heat shrinkage (%) = {(L1-L2) ÷ L1} × 100
H. Measurement of glass transition point (Tg) and melting point (Tm) Using a differential scanning calorimeter (DSC-2) manufactured by PerkinElmer, Inc., the sample was measured with 10 mg at a heating rate of 16 ° C./min. Tm and Tg are defined as follows: after observing the endothermic peak temperature (Tm1) observed once at a rate of temperature increase of 16 ° C / min, hold at a temperature of about (Tm1 + 20) ° C for 5 minutes and then rapidly cool to room temperature (The quenching time and the room temperature holding time are kept for 5 minutes), and when the measurement is again performed at a temperature rise condition of 16 ° C./min, the endothermic peak temperature observed as a stepwise baseline shift is defined as Tg, The endothermic peak temperature observed as the melting temperature of Tm was defined as Tm.

I. Measurement of fiber length of short fibers Short fibers having a length of 20 mm or more are subjected to a load of 0.1 g / dtex using a vernier caliper, and short fibers having a length of less than 20 mm are measured using NIPPON KOGAKU K. The length of 50 short fibers was measured 20 times using K SHADOW GRAPH Model 6 and the average value was defined as the fiber length.

J. et al. Confirmation of the average particle size of carbon black (CB) Dyeing a block in which fibers or resin are embedded in an epoxy resin using a ruthenium oxide solution, cutting with an ultramicrotome, and ultra-thin with a thickness of 60 to 100 nm A section is prepared, and observed with a transmission electron microscope (TEM) observation device (H-7100FA type, manufactured by Hitachi, Ltd.) at an acceleration voltage of 75 kV and an arbitrary magnification of 20,000 to 100,000. The photograph was digitized in black and white. The average particle size of the photograph was confirmed by analyzing the image of CB that appeared black in the computer software WinROOF (version 2.3) manufactured by Mitani Corporation. The average particle diameter was calculated from the average value of the diameters of CB calculated by calculating the area of all the CBs present on the photograph and judging that the area value was substantially circular from the area value.

K. Measurement of Intrinsic Viscosity (IV) and Intrinsic Viscosity [η] In the case of a polyester polymer, the sample was dissolved in an orthochlorophenol solution and measured at 25 ° C. using an Ostwald viscometer. In the case of polyamide polymer, the sample was dissolved in formic acid and measured by the same method as for polyester polymer.

L. Content of the conductive agent in the polyester When the content of the conductive agent is determined with a fiber composed only of the resin composition containing the conductive agent, a spectrophotometer U-3010 manufactured by Hitachi High-Technologies Corporation is used in advance. 5 types of solutions of different concentrations (solvents for dissolving polyester; for example, chloroform for polylactic acid, PET polyester, PTT polyester, and PBT polyester for hexafluoroisopropanol) with known concentrations of the conductive agent After creating a calibration curve by using, the content of the conductive agent in the resin composition containing the conductive agent was determined. In the case of a composite fiber, N. The content of the conductive agent was calculated from the ratio of the resin composition containing the conductive agent obtained in the section. In the case of a polyester that is insoluble or difficult to dissolve in a solvent, the mixture was stirred for 24 hours at 30 ° C. with a 1N aqueous sodium hydroxide solution, centrifuged, and then the amount of the conductive agent was measured.

M.M. Measurement of single fiber diameter After performing a platinum-palladium vapor deposition (deposition film pressure: 25 to 50 angstrom) at an acceleration voltage of 2 kV using a scanning electron microscope (SEM) STRATA DB235 manufactured by FEI Company, the outer diameter of the fiber Are within the field of view (5,000 times if the single fiber diameter is 25-50 μm, 10,000 times if the fiber diameter is 15-25 μm, 20,000 times if it is 5-15 μm). At this time, the single fiber diameter is defined as an average value obtained by observing and measuring at least five points at an interval of 3 cm or more in the same fiber.

N. Calculation of the ratio of polyester (CB-containing PTT) in which the main repeating structural unit containing carbon black is composed of trimethylene terephthalate in the fiber A block in which the filament of the fiber for calculating the ratio is embedded in an epoxy resin, A microtome cut in the cross-sectional direction of the fiber perpendicular to the fiber axis direction to make a thin slice, and observed and photographed with transmitted light with an optical microscope 200 times. In the manufactured WinROOF, the area of the CB-containing PTT portion and other components was obtained by image analysis, and the ratio was calculated.

Comparative Example 1 (Production method of polyethylene terephthalate, preparation of polyethylene terephthalate component added with CB, production of fiber)
To a low polymer obtained by ordinary esterification reaction from 166 parts by weight of terephthalic acid and 75 parts by weight of ethylene glycol, 0.03 part by weight of 85% phosphoric acid aqueous solution as a coloring inhibitor and antimony trioxide as a polycondensation catalyst 0.06 parts by weight, 0.06 parts by weight of cobalt acetate tetrahydrate as a toning agent was added to carry out a polycondensation reaction, and the commonly used IV 0.67, melt viscosity 181 [Pa · s] (measuring temperature 290 ° C. , 12.16 [1 / second]), and a polyethylene terephthalate (hereinafter referred to as PET) pellet having a melting point (Tm) of 256 ° C. was obtained.

The PET pellets are vacuum dried at 150 ° C. for 10 hours, and then are granulated in a nitrogen atmosphere. Before being melt-kneaded using a biaxial extruder (axial length L / axial diameter D = 45), In CB, furnace black (type VULCAN XC72, specific resistance 0.45 [Ω · cm], average particle size 31 nm, hereinafter referred to as FCB) manufactured by Cabot Specialty Chemicals, Inc. is mixed together and melted. And kneaded with the biaxial extruder. Here, FCB was prepared so that the FCB would be 16 wt% in the resin composition of PET and FCB obtained after completion of kneading, and kneaded at 280 ° C. After kneading, the discharged gut-like resin composition is cooled with tap water at 15 ° C. and then cut with a cutter, and melt viscosity is 1341 [Pa · sec] (measurement temperature is 290 ° C., 12.16 [1 / sec]. ) Pellets of a resin composition of PET and FCB (hereinafter referred to as PET-FCB). The (average) specific resistance value of the gut of the resin composition not formed into pellets was 10 ^2.31 [Ω · cm].

  This extruder-type melt spinning machine equipped with a biaxial extruder (axial length L / axial diameter D = 35) using this PET-FCB is a round shape with a spinning temperature of 290 ° C. and a pore diameter of 0.3 mm and 24 holes. A spinneret and a filter with a fine mesh of 20 μm are installed to perform melt spinning, and an aqueous treatment agent (effective component 20 wt. % Concentration) was applied, and melt spinning was attempted at a take-up speed of 1000 m / min. However, at a take-up speed of 1000 m / min, the yarn was severely broken and could not be taken up at all. Therefore, the take-up speed was set at 200 m / min. However, the yarn was still severely cut. As a result, the spinnability was very poor and no take-up yarn was obtained. It was.

Example 1 (Preparation of polytrimethylene terephthalate and preparation of polytrimethylene terephthalate component added with CB, production of fiber)
Dimethyl terephthalate 130 parts (6.7 mole parts), 1,3-propanediol 114 parts (15 mole parts), calcium acetate monohydrate 0.24 parts (0.014 mole parts), lithium acetate dihydrate To a low polymer obtained by transesterifying 0.1 parts (0.01 mole parts) of salt and distilling off methanol, 0.065 parts of trimethyl phosphate and 0.134 parts of titanium tetrabutoxide were added. The polycondensation reaction was performed while distilling off 1,3-propanediol, and a chip-shaped prepolymer was obtained. The obtained prepolymer was further subjected to solid phase polymerization at 220 ° C. under a nitrogen stream, IV 1.15, melt viscosity 493 [Pa · sec] (measurement temperature 260 ° C., 12.16 [1 / sec]), melting point (Tm) Polytrimethylene terephthalate (hereinafter PTT) pellets at 229 ° C. were obtained.

The PTT pellets were vacuum-dried at 150 ° C. for 10 hours and then the same FCB type and the same FCB addition amount (16% by weight) were used in the same apparatus except for kneading at 250 ° C. in the same kneading as in Comparative Example 1. Thus, pellets of a resin composition of PTT and FCB (hereinafter referred to as PTT-FCB) having a melt viscosity of 1238 [Pa · sec] (measurement temperature 260 ° C., 12.16 [1 / sec]) were obtained. When the (average) specific resistance value of the gut of the resin composition not formed into pellets was measured, it was 10 ^2.21 [Ω · cm].

  Using the same extruder type melt spinning machine used in Comparative Example 1 using this PTT-FCB, a spinning experiment was conducted under the same conditions except that the spinning temperature was 260 ° C., and there was no problem at a take-up speed of 1000 m / min. An undrawn yarn having a total fineness of 350 dtex and 24 filaments was wound up. There was no problem in spinnability, and no breakage was observed even during continuous spinning for 5 hours.

  When the obtained multifilament is stretched, the yarn feeding speed of the yarn feeding roller is 320 m / min, the first roller is 60 ° C. and the yarn feeding speed is 320 m / min, and the second roller is 110 ° C. and the yarn feeding speed is 800 m / min. The third roller was drawn at a room temperature of 792 m / min (1% relaxed) at room temperature, subjected to stretching, relaxation, and heat treatment, and then wound with a cold roller after cooling the yarn to below Tg of the polyester. There was no problem such as winding of a single yarn around the roller during drawing, and the drawability was excellent. Table 1 shows the yarn physical properties.

Examples 2 to 7 and Comparative Examples 2 and 3
In Example 1, as shown in Table 1, the amount of carbon black (Examples 2 to 5, Comparative Examples 2 and 3), carbon black species (Example 7, Ketjen Black EC manufactured by Ketjen Black International, specific resistance value) Spinning was carried out under the same spinning conditions as in Example 1, except that 0.2 [Ω · cm], average particle diameter of 31 nm, hereinafter KCB), and fiber thickness (fiber diameter; Example 6, 14 μm) were changed. In the process, the same discharge amount (the same volume amount per unit time [cc / min]) was used, and with respect to the stretching conditions, the first roller temperature was set to 80 ° C. for Examples 3 to 5. Was obtained in the same manner as in Example 1. Even if the type of CB and the fiber diameter were changed, there was no problem with the yarn production (Examples 6 and 7). Further, as the content of CB increases, the physical properties of the resulting fiber are improved in conductivity, but other physical properties tend to decrease, and at an excessively high concentration (Comparative Example 2), the resin before melt spinning. The specific resistance value of the composition was very low, and although it had high electrical conductivity, it could not be taken up by melt spinning. Table 1 shows the yarn physical properties.

<Production of isophthalic acid copolymerized polyethylene terephthalate (hereinafter referred to as PET / I)>
In Comparative Example 1, in place of 166 parts by weight of terephthalic acid, 150 parts by weight of terephthalic acid and 16 parts by weight of isophthalic acid were used in the same manner as in Comparative Example 1, with an IV of 0.65 and a melt viscosity of 119 [Pa · sec]. PET / I pellets (measurement temperature 290 ° C., melting point (Tm) 222 ° C., 12.16 [1 / second]) were obtained. When this PET / I pellet was used for melt spinning, it was vacuum-dried at 130 ° C. for 24 hours.

Examples 8-10
This is an extruder-type composite melt spinning machine equipped with two twin-screw extruders (shaft length L / shaft diameter D = 35), and the sheath component contains 18% by weight of FCB used in Example 2 (hereinafter referred to as PTT-FCB2). (Examples 8 and 10) or PTT containing 25% by weight of FCB used in Example 3 (hereinafter referred to as PTT-FCB3), and the core component having various fiber-forming ability shown in Table 2 (Examples 8 and 9: PET / I, Example 10: A core-sheath type composite fiber made of polytetramethylene terephthalate (type 1100S, melting point (Tm) 225 ° C., hereinafter referred to as PBT) manufactured by Toray Industries, Inc.) is obtained. The composite spinning was performed by winding the fiber obtained by melt spinning in the same manner as in Example 1 except that the spinning temperature was 260 ° C. in Example 10 and 275 ° C. in Examples 8 and 9 respectively. When the obtained fibers were further stretched, Examples 8 and 9 were carried out under the same stretching conditions as in Example 1 except that the first roller was 85 ° C. and the second roller was 130 ° C. About Example 10, it extended | stretched on the same conditions as Example 1, and obtained the fiber shown in Table 2. Like Example 1-6, the fiber excellent in electroconductivity and a thread | yarn physical property was obtained.

Examples 11-13
When performing melt spinning with an extruder type composite melt spinning machine equipped with two biaxial extruders (axial length L / axial diameter D = 35) as in Examples 8 to 10, the core component was PTT used in Example 3 Using FCB3 (Example 11), using PTT containing 25% by weight of KCB used in Example 7 (hereinafter PTT-KCB2) (Example 12), or using FCB used in Example 5 Using PTT containing 50% by weight (hereinafter referred to as PTT-FCB4) (Example 13), and the sheath component having various fiber forming ability shown in Table 2 (Example 11: PTT, Examples 12, 13: PET / I) A composite spinning to obtain a core-sheath type composite fiber is the same as Example 1 except that the spinning temperature is 260 ° C. in Example 11 and 275 ° C. in Examples 12 and 13 respectively. The melt spinning method Obtained by winding the obtained have fiber. When the obtained fiber was further stretched, Example 11 was stretched under the same conditions as in Example 1, and for Examples 12 and 13, the first roller was 85 ° C and the second roller was 130 ° C. The fibers shown in Table 2 were obtained under the same stretching conditions as in Example 1 except that. In Example 12, fibers having a single fiber diameter similar to that of Example 6 were obtained, and in Example 13, fibers having a large single fiber diameter were obtained. Similar to Examples 1 to 10, even when the fiber surface layer is covered with a polymer having fiber-forming ability, the obtained fiber has high conductivity and excellent yarn physical properties due to PTT containing CB at a high concentration. A fiber having was obtained.

Example 14
When composite spinning similar to that in Example 8 is performed, PTT-FCB2 shown in FIG. 1 is arranged so as to have four locations on the fiber surface layer, and composite is used at a spinning temperature of 285 ° C. using PET as a polymer having fiber-forming ability. Except for spinning, melt spinning was performed in the same manner as in Example 8, and was stretched under the same stretching conditions as in Example 9 to obtain fibers having the physical properties described in Table 2. Although the conductive spots (standard deviation) of the obtained fibers were slightly larger than those of Examples 8 to 10, fibers having good conductivity were obtained.

Example 15
When melt spinning similar to that in Example 1, 275 was used with an extruder type melt spinning machine using PTT-FCB3: PET / I = 30: 70, which had been dry blended in the form of pellets in advance. Except for melt spinning conditions at 0 ° C., melt spinning was performed under the same conditions as in Example 1 to obtain undrawn yarns. The undrawn yarn obtained fibers having the physical properties shown in Table 2 under the same drawing conditions as in Example 9. The obtained fiber had good electrical conductivity.

Example 16
After the fibers obtained in Examples 1, 3, 7, 9, 12, 14, and 15 were cut into short fibers having average fiber lengths of 0.5, 1.0, and 2.0 mm, respectively. After being treated with colloidal silica “Snowtex OS (registered trademark)” manufactured by Nissan Chemical Industries, Ltd., Dainippon Ink Chemical Industries, Ltd. was applied to a polyester film “Lumirror (registered trademark) QT33 (thickness: 100 μm)” manufactured by Toray Industries, Inc. Acrylic ester adhesive DICNAL K-1500 (2% by weight of DICNAL VS-20 is used as a thickener with respect to 100% by weight of K-1500; hereinafter referred to as “adhesive A”) is approximately The film was applied to one side of the film with a thickness of 100 μm, and electric flocking was applied to one side of the film to which the adhesive was applied to produce a flocked body. About flocking property (degree of success of flocking), it is almost upright (double circle), some sleeping fibers are seen (○), about half of the fibers are sleeping (△), upright As a result of visually judging that there were few things (x) and evaluating them, both were excellent as double circles.

  Moreover, after giving twist processing using each of the fibers obtained in Examples 2, 6, 8, 10, 11, and 13, respectively, a pile woven fabric and a single tricot knitted fabric were created, and then each of the raised treatments were created, In the same manner as described above, adhesive fabric A was used to adhere to the above-described polyester film to prepare fabric composites. As described above, the raising properties were all excellent.

Example 17
Fabrics were produced at a weaving density of 150 yarns / inch using the fibers produced in Examples 3, 4, 5, 9, and 13 for warp and weft, and electrodes were provided at both ends so that the length was 20 cm and the width was 5 cm. When a fabric object having a length of 20 cm is regarded as a wiring object and a voltage of 100 V is applied to both electrodes, 1.2 ° C./min, 3.8 ° C./min, 4.9 ° C./min, and 0.8 ° C., respectively. The heating element increased in temperature at a heating rate of 3.2 ° C./min.

Example 18
Using the fibers obtained in Examples 1, 2, 3, 6, 7, 8, 9, 10, 11, 12, 13, and 15, short fibers having an average fiber length of 2 mm were prepared. Using adhesive A, an intermediate layer made of urethane to which 5% of conductive carbon black made of SUS304 and metal rod-like object A made of SUS304 was added (thickness 1.5 mm and covered with the end of the metal rod 2 cm) Each of the metal rod-like objects B provided with an electric flocking process (the metal rod-like object B is applied only to the intermediate layer portion), and after each unbonded short fiber was swept away from the rod-like object, a brush roller was obtained. (A1, A2, A3, A6, A7, A8, A9, A10, A11, A12, A13, A15, B1, B2, B3, B6, B7, B8, B9, B10, B11, B12, B13, B15). Further, a pile woven fabric was produced using the yarns twisted in the same manner as in Example 16 using Examples 1, 2, 3, 6, 7, 8, 9, 10, 11, 12, 13, and 15. Is wound, and the raised pile fabric in the form of a slit having a width of 1 cm is wound around the metal rod-like object A and brush rollers (C1, C2, C3, C6, C7, C8, C9, C10, C11, C12, C13, C15) were obtained.

Example 19
Among the brush rollers obtained in Example 18, C1, C2, C6, C7, C8, C10, C11, C12, and C13 are printed continuously for a long time (for 1 minute) with a monochrome laser printer installed and installed in a cleaning device. When printing was confirmed along with changes in humidity in the printer, the humidity in the printer dropped from the initial 65% to 31%, and about 10,000 sheets were printed. However, even when the number of printed sheets exceeded 20000, the sharpness of printing and the toner cleaning performance were excellent. Further, C3, C9, and C15 of the brush rollers were incorporated in the charging device and examined in the same manner. As a result, the sharpness of printing was excellent even when the number of printed sheets exceeded 30,000.

Example 20
Using each of the fibers obtained in Examples 1 to 15, Y-shirts were produced from a plain woven material using only wefts (clothing A1 to A15). The other produced Y-shirts using all the warp and weft fibers obtained in Examples 1 to 15 (clothing B1 to B15). When we conducted a monitor clothing test on 10 randomly selected men, all of the garments A1 to A15 and garments B1 to B15 all responded that they felt cold when touched (there was a cold feeling of contact), and garments A3 All six respondents answered A5 and apparel B3 to B5, "I feel very cold when I wear them (I feel a sense of cool contact)."

Example 21
Using the fibers obtained in Comparative Example 3 and Examples 1, 3, 9, 13, 14, and 15, carpets (size 1 m × 1 m) mainly formed from nylon 6 containing 10% by weight of these fibers are produced. On top of that, wear leather shoes made of synthetic leather that is not subjected to conductive processing, etc., and step on it 100 times in an atmosphere of 23 ° C. and 55% humidity, then touch the metal door knob while riding on the carpet. When an experiment was conducted, only the comparative example 3 caused discharge due to the generation of static electricity, but the fibers obtained in Examples 1, 3, 9, 13, 14, and 15 did not discharge static electricity.

  As described above, the woven fabric using at least a part of the polyester fiber of the present invention uses a fiber having very excellent conductivity as described above. Even if this fiber is used as a part of the fabric, it becomes a woven fabric having excellent conductive performance or performance capable of escaping electricity (in other words, electrostatic performance). It can be used for seats of vehicles such as automobiles, railways, and airplanes, wall materials and rugs, futons, blankets, mattresses, etc. that are prone to generate static electricity in the human body, and can exhibit excellent performance.

  Further, the knitted fabric using at least a part of the polyester fiber of the present invention becomes a knitted fabric having conductive performance or electrostatic performance similar to the above-mentioned woven fabric, and therefore is used for various materials, for example, rugs such as building wall materials and carpets. It can be used for vehicle seats such as automobiles and railroad aircraft, wall materials, rug vehicle seats, or bedding such as futons, blankets, mattresses, etc., and can exhibit excellent performance.

  In addition, since the nonwoven fabric using the polyester fiber of the present invention at least in part is a nonwoven fabric having electrical conductivity or electrostatic performance similar to the above-described woven fabric or knitted fabric, the same material as that for the above-described woven fabric or knitted fabric is used. In addition, it can be widely used as a material that requires a thickness, for example, a partition material, a package, a cushion, or a device that does not like the generation of static electricity, or a peripheral member of a room, and can exhibit excellent performance.

  Further, as still another application of the short fiber made of the polyester fiber of the present invention, woven fabric, particularly pile woven fabric, knitted fabric or non-woven fabric, these are used and planted on a base to form a flocked body or a fabric composite. be able to. Since these flocks or fabric composites are excellent in electrical conductivity or antistatic properties, they can be used as various interior materials with excellent touch.

  In addition, the polyester fiber of the present invention or the short fiber made of the conductive fiber is excellent in conductivity, so that it is possible to form a wiring object, such as an artificial muscle that reacts with weak electricity, for example, various operations. It can be used as part of the actuator circuit. Alternatively, a heating element can be formed from a wiring object, and since this uses the polyester fiber of the present invention having excellent conductivity and small conductive spots, it is only necessary to use one that is controlled to have a desired conductivity performance. A heating element with good heat generation efficiency is obtained and is excellent. In addition, the heat generation element that is likely to be used is a low temperature and low humidity mainly in winter, but the polyester fiber of the present invention is not dependent on temperature or humidity or is very small, so that stable conductive performance even in winter It becomes a very excellent heating element.

  Moreover, since the apparel which uses the polyester fiber of this invention for at least one part uses the fiber excellent in electroconductivity, generation | occurrence | production of the static electricity at the time of clothes can be suppressed and it can escape to a body. Therefore, it is particularly useful when it is used as a dust-proof garment for work clothes in the semiconductor industry, which does not like the generation of static electricity, or because it does not easily generate static electricity. In addition, since CB is excellent in thermal conductivity, it is useful as a contact cold sensation clothing that can dissipate heat outside the body, or a contact temperature sensation clothing that can immediately take in heat from outside the body to a cold body. is there. For example, sports clothing (such as golf wear, gateball, baseball, tennis, soccer table tennis, volleyball, basketball, rugby, American football, hockey, athletics, triathlon, speed skating, ice hockey) It can be suitably used for clothing for infants, women, elderly people, and other outdoor clothing (shoes, bags, supporters, socks, climbing clothes).

  Moreover, the polyester fiber brush roller formed by bonding the woven fabric and / or the knitted fabric and / or the non-woven fabric using at least a portion of the polyester fiber of the present invention as at least a portion thereof is a conductive fiber. Since it is used for at least a part, it has a function of efficiently removing unnecessary substances or imparting a necessary substance by utilizing an electrical action, and thus can exhibit excellent performance.

  Moreover, since the polyester fiber brush roller using the short fiber which consists of the polyester fiber of this invention uses the fiber which has electroconductivity for at least one part, it is efficient by utilizing an electrical effect similarly to the above. It is excellent in that it has a function of removing unnecessary substances or adding necessary substances. It is also excellent in that the fiber planting density of the brush roller or the removal performance or application performance of the fiber brush roller can be easily controlled according to the purpose by controlling the fiber length of the short fibers. In particular, when the rod-shaped object to be implanted is mainly made of metal, the conductivity (specific resistance value) of the fiber brush roller itself can be controlled by controlling the conductivity of the polyester fiber of the present invention. When the object is composed of a metal and an intermediate layer covering at least a part of the metal, cushioning properties can be imparted by controlling the material and thickness of the intermediate layer. Therefore, the removal performance or imparting performance of the fiber brush roller itself can be remarkably improved, and excellent performance can be exhibited.

  In addition, the cleaning device using the polyester fiber brush roller of the present invention is very excellent in removal performance when the brush roller itself rotates to remove unnecessary substances and clean them. For example, in the electrophotographic apparatus described later, the conductive performance of the brush roller does not fluctuate even when there is a change in the environment in the electrophotographic apparatus, particularly a change in humidity when the toner can be electrically removed. It always has stable removal performance and is excellent. Further, the brush roller of the present invention is not necessary for the cleaning material itself, for example, in the electrophotographic apparatus described later, in addition to cleaning by directly contacting the photosensitive member, the cleaning roller itself is unnecessary. It is also useful as a member for removing an object and cleaning the cleaning device itself, resulting in a high-performance cleaning device.

  Further, the charging device using the polyester fiber brush roller of the present invention is used by controlling the conductivity (specific resistance value) of the brush roller itself. When used as a brush roller for charging like this, the photosensitive member can be charged uniformly, which is excellent. In addition, the specific resistance value of the brush roller itself does not change or changes very little even when the environment in the electrophotographic apparatus changes, for example, during operation of the electrophotographic apparatus or humidity changes due to seasonal changes. Is also excellent in that it is difficult to express. Further, when there is a remaining colorant (toner) due to insufficient cleaning on the photoconductor of the electrophotographic apparatus, the brush roller can also function as a cleaning roller, so that it can be used during development or printing. It is excellent with little or no contamination. In addition, in the case of downsizing the electrophotographic apparatus, the cleaning apparatus and the charging apparatus are not separately installed, but can be applied only with the brush roller as a combined use, that is, as a cleaning apparatus and charging apparatus. Performance.

  Further, the developing device using the polyester fiber brush roller of the present invention is used by making full use of the conductivity of the brush roller itself as in the effect of the charging device described above. When the toner is attached to the electrostatic latent image drawn on the body, there is little or no unevenness of the specific resistance value of the brush roller itself when the environment changes such as humidity change as described above. Accordingly, the toner is uniformly supplied to the photosensitive member to be visualized, and the obtained developed or printed matter is very beautiful with little or no contamination, and can exhibit excellent performance.

  Further, the static eliminator using the polyester fiber brush roller of the present invention controls the content of conductive carbon black contained in the fiber to reduce the conductivity (specific resistance value) of the brush roller. Therefore, it is useful because it becomes a brush roller having very excellent static elimination performance. Particularly when used in an electrophotographic apparatus, a brush roller made of countless hairs (fibers) has a stable and uniform neutralizing effect, so that the cleaning effect is provided by the cleaning device disposed after the neutralizing device. Can be further increased. Further, when the electrophotographic apparatus is downsized, it can be incorporated as a static eliminator and a cleaning apparatus by using the brush roller, which is excellent.

  Furthermore, the cleaning device and / or the charging device and / or the developing device and / or the static eliminator using at least a part of the polyester fiber of the present invention, specifically a laser beam printer, copying. As described above, a device that develops or prints a latent image with a laser on a charged photoreceptor such as a machine, facsimile, multifunctional multifunction device, or word processor, and visualizes it with toner is included in the electrophotographic apparatus as described above. The printed or developed product obtained is very beautiful because it has stable cleaning, charging, developing, and charge removal performance regardless of environmental changes. In addition, by optimizing the fiber length of the fiber brush roller or the content of conductive carbon black contained in the fiber brush roller, it has more stable cleaning, electric resistance, development, and static elimination performance. It is possible to increase, that is, increase the printing or developing speed (number of sheets) per unit time, which is very preferable.

  As described above, the polyester fiber according to the present invention and the fiber product using the polyester fiber are used in various applications that require excellent conductivity, various uses that require stable conductivity against humidity changes, and the like. Can be suitably used for various applications that require other performance such as charge removal performance and charging performance.

It is explanatory drawing which shows schematic structure of the cross section of the fiber obtained in Example 15. FIG.

Explanation of symbols

1: Polyester resin composition in which the main repeating structural unit containing carbon black is composed of trimethylene terephthalate 2: Polymer having fiber-forming ability (polyethylene terephthalate in Example 15)

Claims (11)

A polyester fiber comprising a polyester resin composition containing carbon black, wherein the main repeating structural unit is trimethylene terephthalate, and having an average resistivity P of 1.0 × 10 ¹² [Ω / cm] or less.   The polyester fiber according to claim 1, wherein the polyester resin composition forms at least a part of a fiber surface.   3. The polyester fiber according to claim 1, wherein a ratio R (R = Q / P) between the average resistivity P and the standard deviation Q of the resistivity is 0.5 or less.   A ratio Z (Z = Y / X) of an average resistivity X [Ω / cm] at a temperature of 23 ° C. and a humidity of 55% and an average resistivity Y [Ω / cm] at a temperature of 10 ° C. and a humidity of 15% is 1 to 1. The polyester fiber according to claim 1, wherein the polyester fiber is in the range of 5. 5.   5. The polyester fiber according to claim 1, wherein an initial tensile elastic modulus is 15 to 80 cN / dtex.   The polyester fiber according to any one of claims 1 to 5, wherein the content of carbon black in the polyester resin composition is 15 wt% or more and 50 wt% or less.   The polyester fiber according to any one of claims 1 to 6, wherein the fiber is a short fiber having a fiber length of 0.05 to 150 mm. The polyester fiber according to claim 1, wherein a specific resistance of the polyester resin composition is 1.0 × 10 ⁴ [Ω · cm] or less.   A polyester fiber product comprising at least a part of the polyester fiber according to claim 1.   The polyester fiber product according to claim 9, which is a fiber brush.   The polyester fiber product according to claim 10, wherein the fiber brush is a brush for an electrophotographic apparatus.

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