US20200216984A1 - Conductive composite fiber - Google Patents

Conductive composite fiber Download PDF

Info

Publication number
US20200216984A1
US20200216984A1 US16/647,257 US201816647257A US2020216984A1 US 20200216984 A1 US20200216984 A1 US 20200216984A1 US 201816647257 A US201816647257 A US 201816647257A US 2020216984 A1 US2020216984 A1 US 2020216984A1
Authority
US
United States
Prior art keywords
conductive
fiber
composite fiber
polymer
conductive composite
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US16/647,257
Other languages
English (en)
Inventor
Sumio Yamaguchi
Sho Murata
Yasunori Kanemori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toray Industries Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of US20200216984A1 publication Critical patent/US20200216984A1/en
Assigned to TORAY INDUSTRIES, INC. reassignment TORAY INDUSTRIES, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MURATA, Sho, YAMAGUCHI, SUMIO, KANEMORI, Yasunori
Abandoned legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/09—Addition of substances to the spinning solution or to the melt for making electroconductive or anti-static filaments
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/16—Physical properties antistatic; conductive

Definitions

  • This disclosure relates to a conductive composite fiber having excellent static elimination performance. More specifically, the disclosure relates to a conductive composite fiber in which the variation in the fiber surface specific resistance and the variation in areas of conductive layers in a fiber cross section is suppressed by exposure of the conductive layers at three or more locations on the fiber surface, crimping of the original yarn is suppressed by equal disposition, and antistatic performance for woven and knitted fabrics is improved.
  • metal fibers such as steel fibers are known to have excellent static elimination performance.
  • Metal fibers are, however, expensive and difficult to match with general organic materials so that metal fibers easily have poor spinning performance, cause problems in processes of weaving, and dyeing and finishing, cause breaking and falling due to washing when worn, and also cause problems of electric shock and sparking due to electrical conductivity, trouble in fabric melting and the like.
  • a fiber in which a conductive polymer layer containing conductive carbon and a nonconductive polymer layer containing the same polymer and no conductive carbon are laminated together in a multilayer shape is proposed for the purpose of improving durability, mainly for the purpose of improving static elimination performance and preventing exfoliation between the component layers. Also in the fiber, however, the layer containing a conductive carbon black is exposed too much on the surface so that improvement in chemical resistance and durability is not recognized.
  • JP '031 provides a conductive fiber having an excellent static elimination effect and static elimination durability obtained by exposure of conductive layers at four or more locations on the outside surface of the fiber in a fiber cross section and by substantially equal disposition of conductive layers.
  • a conductive composite fiber containing: a polymer as conductive layers, the polymer containing a polyamide resin containing a conductive carbon black; and a thermoplastic resin as a nonconductive layer, wherein the conductive layers are exposed at three or more locations on an outside surface of the conductive composite fiber in a fiber cross section, a coefficient of variation (CV %) of areas of the conductive layers in a fiber cross section is 10% or less, and the conductive composite fiber has an average value of a volume specific resistance of 4 log ( ⁇ cm) or less.
  • FIG. 1 is a front sectional view of a main part of the structure of an exemplary composite spinneret for illustrating a method of manufacturing the conductive composite fiber.
  • FIGS. 2( a )-2( c ) are exemplary schematic views showing a cross section of the conductive composite fiber.
  • the conductive composite fiber is a conductive composite fiber containing a polymer containing a polyamide resin containing a conductive carbon black as a conductive layer, and a thermoplastic resin as a nonconductive layer.
  • the polyamide resin used in the conductive layer is not particularly limited as long as it is a polymer including amide bonds produced by repeated polycondensation.
  • the polyamide resin may be nylon 6, nylon 66, nylon 12, nylon 610 or the like, or may be a polyamide containing a small amount of a third component.
  • the conductive carbon black may be furnace black, acetylene black, channel black, ketjen black or the like, and is preferably furnace black having excellent dispersibility.
  • the thermoplastic resin used in the nonconductive layer is not particularly limited as long as it is a fiber-forming thermoplastic polymer, and is preferably a polyamide or a polyester because a polymer having poor spinnability has poor process passability.
  • the polyamide is not particularly limited as long as it is a polymer including amide bonds produced by repeated polycondensation.
  • the polyamide may be nylon 6, nylon 66, nylon 12, nylon 610 or the like, or may be a polyamide containing a small amount of a third component. Furthermore, the polyamide may contain a small amount of additive, matting agent and the like.
  • the polyester is preferably polyethylene terephthalate in which 80 mol % or more of repeating units are ethylene terephthalate, polybutylene terephthalate in which 80 mol % or more of repeating units are butylene terephthalate, or polytrimethylene terephthalate in which 80 mol % or more of repeating units are trimethylene terephthalate.
  • the polyester may be copolymerized with aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, naphthalene 2,6-dicarboxylic acid, phthalic acid, and 5-sodium sulfoisophthalic acid, aliphatic dicarboxylic acids such as adipic acid and sebacic acid and the like to such an extent that the fiber-forming property inherently possessed by the polyester homopolymer is not impaired.
  • the polyester may contain a small amount of additive, matting agent and the like.
  • the conductive layers are exposed at three or more locations on the outside surface of the conductive composite fiber in a fiber cross section. By the exposure at three or more locations, the variation in the fiber surface specific resistance can be suppressed, and stable static elimination performance can be maintained. When the conductive layers are exposed at two or less locations, the variation in the fiber surface specific resistance increases, and it is difficult to obtain desired static elimination performance.
  • the CV % in area of the conductive layers in a fiber cross section is 10% or less.
  • the CV % in area of the conductive layers exceeds 10%, the variation in the conductivity between the conductive layers increases, missing occurs in the conductive layer portion when the conductive composite fiber is used continuously for a long period of time, and stable static elimination performance cannot be obtained.
  • the CV % is preferably 8% or less.
  • the conductive composite fiber has an average value of the volume specific resistance of 4 log ( ⁇ cm) or less.
  • the average value of the volume specific resistance is preferably 2 to 3.5 log ( ⁇ cm).
  • the means for setting the average value of the volume specific resistance to 4 log ( ⁇ cm) or less may be any of a method of adjusting the concentration of the conductive carbon black contained in the polyamide resin, adjusting the occupancy rate of the conductive layers in the surface area in a fiber cross section and the like.
  • the conductive carbon black preferably has a specific electrical resistance of 10 ⁇ 3 to 10 2 ( ⁇ cm).
  • ⁇ cm specific electrical resistance
  • the electric conduction mechanism of the conductive carbon black-containing composite a carbon black chain contact and a tunnel effect can be mentioned, and the former is mainly mentioned. Accordingly, the longer the carbon black chain is, and at the higher density the carbon black is present in the polymer, the higher the contact probability is, and the higher the conductivity is.
  • the conductive carbon black content is less than 15% by mass, there is almost no effect.
  • the content is 20% by mass, the conductivity is rapidly improved, and when the content exceeds 40% by mass, the effect is almost saturated.
  • the concentration of the conductive carbon black is preferably 30 to 40% by mass.
  • the occupancy rate of the conductive layers in the surface area in a fiber cross section is not particularly limited, but is preferably 3 to 10% from the viewpoints of spinnability, stretchability, and high-order passability.
  • the occupancy rate in such a range, the abrasion resistance with various guides in a yarn-making process and a high-order processing process can be suppressed, and stable spinnability, stretchability, and high-order passability can be obtained.
  • the CV % of the angle formed by neighboring line segments each connecting the middle point of the exposed portion of each of the conductive layers on the outside surface of the conductive composite fiber in a fiber cross section and the center point of the fiber cross section is preferably 5% or less.
  • Crimping is represented by the crimping rate calculated from the difference between the fiber length without a load and the fiber length with a load of 0.04 cN/dtex of the conductive composite fiber as described below in EXAMPLES. For example, when the fiber length without a load is 400 mm, and the fiber length with a load of 0.04 cN/dtex is 415 mm, the crimping rate is 3.8%.
  • the conductive layers be equally disposed in a fiber cross section to develop more excellent static elimination performance.
  • the conductive layer contains a conductive carbon black at a high concentration of 30 to 40% based on the polyamide resin depending on the static elimination performance, the polymer has reduced fluidity at the time of melting.
  • the conductive layer component containing such a polymer having the reduced fluidity is distributed, by using a composite spinneret having a structure in which distribution, merging, and measuring are repeated a plurality of times with a merging groove having a plurality of distribution holes, the conductive layers can be equally disposed, and the area CV % and the angle CV % can be controlled in such ranges.
  • the composite spinneret shown in FIG. 1 is incorporated into a spinning pack in a state where mainly three types of members, that is, a measuring plate 1 , a distribution plate 2 , and an ejecting plate 3 are stacked in this order from the top, and the pack is used for spinning.
  • the measuring plate 1 has a role of measuring the amount of the polymer per each ejecting hole 6 and flowing the polymer into the distribution plate 2 .
  • the distribution plate 2 has a role of controlling the composite cross section and the cross-sectional shape in the single fiber cross section, and the ejecting plate 3 has a role of compressing and ejecting the composite polymer flow formed with the distribution plate 2 .
  • a member having a channel is required to be used in accordance with the spinning machine and the spinning pack.
  • the measuring plate 1 By designing the measuring plate 1 in accordance with the existing channel member, the existing spinning pack and members of the spinning pack can be used as they are. Therefore, it is not necessary to dedicate the spinning machine especially to the spinneret.
  • a plurality of channel plates (not shown) is preferably stacked between the channel and the measuring plate or between the measuring plate 1 and the distribution plate 2 .
  • the purpose is to provide a structure with the channel through which the polymer is transferred and introduced into the distribution plate 2 efficiently in the cross-sectional direction of the spinneret and in the cross-sectional direction of the single fiber.
  • the composite polymer flow ejected from the ejecting plate 3 is formed into a composite fiber using a method in which the composite polymer flow is cooled and solidified, an oil agent is applied to the composite polymer flow, and an undrawn yarn is wound up once and then heated and drawn in accordance with a conventional melt spinning method, or a direct spinning drawing method in which an undrawn yarn is heated and drawn without being wound up once.
  • the oxygen concentration immediately below the composite spinneret (ejecting plate 3 ) is controlled to 1% or less.
  • the oxygen concentration (%) is measured using an oxygen concentration meter XP3180E manufactured by NEW COSMOS ELECTRIC CO., LTD. with the tip of a detection tube attached to the lower surface of the ejecting plate.
  • the oxygen concentration was measured at the following three points, that is, the center of the lower surface of the ejecting plate, the position of the ejecting hole in the outermost layer within an area formed by quadrisecting the lower surface of the ejecting plate, and the midpoint between the center of the lower surface of the ejecting plate and the ejecting hole in the outermost layer, and the number average value was determined.
  • the oxygen concentration in such a range, the effect of suppressing contamination of the spinneret is exhibited and, as a result, formation of the composite cross section is stabilized.
  • the effect is more remarkable.
  • the formation stability of the composite cross section over time can be dramatically improved, and the conductive layers can be accurately equally disposed.
  • the fineness was measured in accordance with JIS L1013 (2010) 8.3.1, Fineness based on Corrected Weight (Method A).
  • the official moisture regain of a polyamide was 4.5%, and the official moisture regain of a polyester was 0.4%.
  • the electrical resistance value ( ⁇ /cm) was measured under conditions of a temperature of 20° C. and a humidity of 30% RH using a super-insulation resistance meter (TERAOHMMETER R-503, manufactured by Kawaguchi Denki), and applying a voltage of 100 (V) to a fiber having a test length of 10 cm, and the volume specific resistance was calculated from the following formula:
  • the cross section of the conductive composite fiber was enlarged 100 to 300 times using a digital microscope (VHX-2000) manufactured by KEYENCE CORPORATION, the areas of conductive layer parts in a single yarn were measured, and the CV value was calculated.
  • VHX-2000 digital microscope manufactured by KEYENCE CORPORATION
  • the cross section of the conductive composite fiber was enlarged 100 to 300 times using a digital microscope (VHX-2000) manufactured by KEYENCE CORPORATION, angles formed by neighboring line segments each connecting a middle point of an exposed portion of each of the conductive layers on the outside surface of the fiber in the fiber cross section and the center point of the fiber cross section in a single yarn (two-dot chain lines in FIGS. 2( a )-2( c ) ) were measured, and the CV value was calculated.
  • VHX-2000 digital microscope manufactured by KEYENCE CORPORATION
  • a sample to be measured at medium temperature and medium humidity (25° C., relative humidity 60%) was kept in the atmosphere for at least 48 hours and then measured.
  • the resistance value for a length of 10 m was measured with a device in which the running yarn was applied to a probe including two rod terminals connected to an insulation resistance meter SM-8220 manufactured by HIOKI E.E.
  • the fiber length without a load and the fiber length with a load of 0.04 cN/dtex of the conductive composite fiber were measured, and the crimping rate was calculated from the formula below. The resulting value is rounded off to the first decimal place.
  • the conductive composite fiber was mixed with a nylon 6 crimped yarn having a total fineness of 2800 dtex with an air nozzle, the resulting crimped yarn containing the conductive composite fiber was mixed at a rate of 1 to 12, the mixture of the resulting crimped yarn and the nylon 6 crimped yarn was formed into a tuft having a fabric weight of 400 g/m 2 and a pile height of 4.0 m, the tuft was cut into a size of 30 cm ⁇ 30 cm in width, the charging potential was measured 5 times at each level in accordance with JIS A 1455 (floor rubbing type charging test), and the average charging potential of the resulting three charging potential values excluding the maximum and minimum values was determined and evaluated.
  • JIS A 1455 floor rubbing type charging test
  • a nylon-based chip (trade name “CARBOREX NYRON YT-01” manufactured by DIC Corporation) containing 35% by mass of a conductive carbon black was used as a conductive layer polymer, and a nylon 6 chip was used as a nonconductive layer polymer.
  • the chips were melted at a melting temperature of 280° C. in individual pressure melters at a ratio of 5% by mass of the conductive layer polymer to 95% by mass of the nonconductive layer polymer, the melted chips were merged into a spinning pack and a spinneret to form a composite, and the composite was ejected from the spinneret so that the conductive layer polymer was equally disposed and exposed at three locations on the fiber surface.
  • the spinneret used three types of members, that is, a measuring plate 1 , a distribution plate 2 , and an ejecting plate 3 were stacked in this order from the top, and a plurality of distribution plates were stacked to form a fine channel as shown in FIG. 1 . Then, with the oxygen concentration immediately below the spinneret controlled to 1.0% or less, the polymer ejected from the spinneret was cooled with cold air at 18° C. and fed with an emulsion oil agent, and then an undrawn yarn was obtained at a speed of 900 m/min. Subsequently, the undrawn yarn was aged for 24 hours in an environment of a temperature of 25° C.
  • the obtained conductive composite fiber had a volume specific resistance value of 3.3 log ( ⁇ cm), an area CV value of conductive layers of 3.0%, and an angle CV value of 2.0%.
  • the variation in the surface specific resistance was 0.306
  • the crimping rate was 2.3%
  • the charging potential was also suppressed to ⁇ 45 V in the conductive performance evaluation on a carpet.
  • the result of the overall evaluation was A and at an acceptable level.
  • a conductive composite fiber was obtained under the same conditions as in Example 1, except that the ratio of the conductive layer polymer was changed to 3% by mass, the ratio of the nonconductive layer polymer was changed to 97% by mass, and the number of locations of the exposed conductive layers was changed to six.
  • the obtained conductive composite fiber had a volume specific resistance value of 3.5 log ( ⁇ cm), an area CV value of conductive layers of 6.1%, and an angle CV value of 3.1%.
  • the variation in the surface specific resistance can be suppressed to 0.10 ⁇ because the number of locations of the exposed conductive layers was changed to six.
  • the crimping rate was at a level of 2.8%, and the charging potential was also suppressed to ⁇ 38 V in the conductive performance evaluation on a carpet.
  • the result of the overall evaluation was S and at an acceptable level.
  • a conductive composite fiber was obtained under the same conditions as in Example 1, except that the number of locations of the exposed conductive layers was changed to six.
  • the obtained conductive composite fiber had a volume specific resistance value of 3.2 log ( ⁇ cm), an area CV value of conductive layers of 6.0%, and an angle CV value of 3.0%.
  • the variation in the surface specific resistance can be suppressed to 0.10 ⁇ because the number of locations of the exposed conductive layers was changed to six.
  • the crimping rate was at a level of 2.9%, and the charging potential was suppressed to ⁇ 30 V in the conductive performance evaluation on a carpet.
  • the result of the overall evaluation was S and at an acceptable level.
  • a conductive composite fiber was obtained under the same conditions as in Example 1, except that a nylon-based chip containing 45% by mass of a conductive carbon black was used as a conductive layer polymer, and the number of locations of the exposed conductive layers was changed to six.
  • the obtained conductive composite fiber had a volume specific resistance value of 1.9 log ( ⁇ cm), an area CV value of conductive layers of 6.1%, and an angle CV value of 4.9%.
  • the variation in the surface specific resistance can be suppressed to 0.12 ⁇ because the number of locations of the exposed conductive layers was changed to six.
  • the crimping rate was at a level of 4.7% because the melt viscosity of the conductive layer polymer was high, however, the charging potential was ⁇ 45 V in the conductive performance evaluation on a carpet.
  • the result of the overall evaluation was A and at an acceptable level.
  • a conductive composite fiber was obtained under the same conditions as in Example 1, except that the ratio of the conductive layer polymer was changed to 7% by mass, the ratio of the nonconductive layer polymer was changed to 93% by mass, and the number of locations of the exposed conductive layers was changed to nine.
  • the obtained conductive composite fiber had a volume specific resistance value of 2.8 log ( ⁇ cm), an area CV value of conductive layers of 6.7%, and an angle CV value of 3.3%.
  • the variation in the surface specific resistance was a favorable result of 0.08 ⁇ because the number of locations of the exposed conductive layers was changed to nine.
  • the crimping rate was at a level of 3.3%, and the charging potential was suppressed to ⁇ 28 V in the conductive performance evaluation on a carpet.
  • the result of the overall evaluation was S and at an acceptable level.
  • a conductive composite fiber was obtained under the same conditions as in Example 1, except that the ratio of the conductive layer polymer was changed to 10% by mass, the ratio of the nonconductive layer polymer was changed to 90% by mass, and the number of locations of the exposed conductive layers was changed to 12.
  • the obtained conductive composite fiber had a volume specific resistance value of 2.5 log ( ⁇ cm), an area CV value of conductive layers of 8.2%, and an angle CV value of 3.5%.
  • the variation in the surface specific resistance was a favorable result of 0.06 ⁇ because the number of locations of the exposed conductive layers was changed to 12.
  • the crimping rate was at a level of 4.9%, and the charging potential was suppressed to ⁇ 46 V in the conductive performance evaluation on a carpet.
  • the result of the overall evaluation was A and at an acceptable level.
  • a nylon-based chip (trade name “CARBOREX NYRON YT-01” manufactured by DIC Corporation) containing 35% by mass of a conductive carbon black was used as a conductive layer polymer, and a polyester chip was used as a nonconductive layer polymer.
  • the chips were melted at a melting temperature of 285° C. in individual pressure melters at a ratio of 5% by mass of the conductive layer polymer to 95% by mass of the nonconductive layer polymer, the melted chips were merged into a spinning pack and a spinneret to form a composite, and the composite was ejected from the spinneret so that the conductive layer polymer was equally disposed and exposed at three locations on the fiber surface.
  • the spinneret used three types of members, that is, a measuring plate 1 , a distribution plate 2 , and an ejecting plate 3 were stacked in this order from the top, and a fine channel was formed as shown in FIG. 1 . Then, with the oxygen concentration immediately below the spinneret controlled to 1.0% or less, the polymer ejected from the spinneret was cooled with cold air at 18° C. and fed with an emulsion oil agent, and then an undrawn yarn was obtained at a speed of 900 m/min. Subsequently, the undrawn yarn was aged for 24 hours in an environment of a temperature of 25° C.
  • the obtained conductive composite fiber had a volume specific resistance value of 3.3 log ( ⁇ cm), an area CV value of conductive layers of 3.1%, and an angle CV value of 2.1%.
  • the variation in the surface specific resistance was 0.31 ⁇
  • the crimping rate was 2.4%
  • the charging potential was also suppressed to ⁇ 44 V in the conductive performance evaluation on a carpet.
  • the result of the overall evaluation was A and at an acceptable level.
  • a conductive composite fiber was obtained under the same conditions as in Example 7, except that the number of locations of the exposed conductive layers was changed to six.
  • the obtained conductive composite fiber had a volume specific resistance value of 3.2 log ( ⁇ cm), an area CV value of conductive layers of 6.1%, and an angle CV value of 3.1%.
  • the variation in the surface specific resistance can be suppressed to 0.11 ⁇ because the number of locations of the exposed conductive layers was changed to six.
  • the crimping rate was at a level of 2.9%, and the charging potential was suppressed to ⁇ 31 V in the conductive performance evaluation on a carpet.
  • the result of the overall evaluation was S and at an acceptable level.
  • a nylon-based chip (trade name “CARBOREX NYRON YT-01” manufactured by DIC Corporation) containing 35% by mass of a conductive carbon black was used as a conductive layer polymer, and a nylon 6 chip was used as a nonconductive layer polymer.
  • the chips were melted at a melting temperature of 280° C. in individual pressure melters at a ratio of 5% by mass of the conductive layer polymer to 95% by mass of the nonconductive layer polymer, the melted chips were merged into a spinning pack and a spinneret to form a composite, and the composite was ejected from the spinneret so that the conductive layer polymer was equally disposed and exposed at two locations on the fiber surface.
  • the spinneret used three types of members, that is, a measuring plate 1 , a distribution plate 2 , and an ejecting plate 3 were stacked in this order from the top, and a fine channel was formed as shown in FIG. 1 . Then, with the oxygen concentration immediately below the spinneret controlled to 1.0% or less, the polymer ejected from the spinneret was cooled with cold air at 18° C. and fed with an emulsion oil agent, and then an undrawn yarn was obtained at a speed of 900 m/min. Subsequently, the undrawn yarn was aged for 24 hours in an environment of a temperature of 25° C.
  • the obtained conductive composite fiber had a volume specific resistance value of 3.3 log ( ⁇ cm), an area CV value of conductive layers of 3.1%, and an angle CV value of 2.2%.
  • the variation in the surface specific resistance was 0.426
  • the crimping rate was 2.4%
  • the charging potential was as high as ⁇ 56 V in the conductive performance evaluation on a carpet.
  • the result of the overall evaluation was B and at an unacceptable level.
  • a conductive composite fiber was obtained under the same conditions as in Comparative Example 1, except that a nylon-based chip containing 20% by mass of a conductive carbon black was used as a conductive layer polymer, and the number of locations of the exposed conductive layers was changed to three.
  • the obtained conductive composite fiber had a volume specific resistance value of 4.5 log ( ⁇ cm), an area CV value of conductive layers of 2.8%, and an angle CV value of 2.0%.
  • the variation in the surface specific resistance was 0.29 ⁇ , and the crimping rate was 2.3%.
  • the charging potential was, however, as high as ⁇ 65 V in the conductive performance evaluation on a carpet because the volume specific resistance was high.
  • the result of the overall evaluation was B and at an unacceptable level.
  • a conductive composite fiber was obtained under the same conditions as in Comparative Example 1, except that the oxygen concentration immediately below the spinneret was changed to 2.0%, and the number of locations of the exposed conductive layers was changed to six.
  • the obtained conductive composite fiber had a volume specific resistance value of 3.2 log ( ⁇ cm), an area CV value of conductive layers of 11.0%, and an angle CV value of 6.0%.
  • the variation in the surface specific resistance was 0.306
  • the crimping rate was 5.8%
  • the charging potential was as high as ⁇ 57 V in the conductive performance evaluation on a carpet.
  • the result of the overall evaluation was B and at an unacceptable level.
  • a conductive composite fiber was obtained under the same conditions as in Comparative Example 1, except that in the spinneret used, three members, that is, a measuring plate, a distribution plate (no stacked distribution), and an ejecting plate were stacked, and the number of locations of the exposed conductive layers was changed to six.
  • the obtained conductive composite fiber had a volume specific resistance value of 3.2 log ( ⁇ cm), an area CV value of conductive layers of 13.0%, and an angle CV value of 7.0%.
  • the variation in the surface specific resistance was 0.41 ⁇
  • the crimping rate was 8.1%
  • the charging potential was as high as ⁇ 70 V in the conductive performance evaluation on a carpet.
  • the result of the overall evaluation was C and at an unacceptable level.
  • a nylon-based chip (trade name “CARBOREX NYRON YT-01” manufactured by DIC Corporation) containing 35% by mass of a conductive carbon black was used as a conductive layer polymer, and a polyester chip was used as a nonconductive layer polymer.
  • the chips were melted at a melting temperature of 285° C. in individual pressure melters at a ratio of 5% by mass of the conductive layer polymer to 95% by mass of the nonconductive layer polymer, the melted chips were merged into a spinning pack and a spinneret to form a composite, and the composite was ejected from the spinneret so that the conductive layer polymer was equally disposed and exposed at six locations on the fiber surface.
  • the spinneret used three members, that is, a measuring plate, a distribution plate (no stacked distribution), and an ejecting plate were stacked. Then, with the oxygen concentration immediately below the spinneret controlled to 1.0% or less, the polymer ejected from the spinneret was cooled with cold air at 18° C. and fed with an emulsion oil agent, and then an undrawn yarn was obtained at a speed of 900 m/min. Subsequently, the undrawn yarn was aged for 24 hours in an environment of a temperature of 25° C.
  • the obtained conductive composite fiber had a volume specific resistance value of 3.3 log ( ⁇ cm), an area CV value of conductive layers of 12.9%, and an angle CV value of 6.9%.
  • the variation in the surface specific resistance was 0.37 ⁇
  • the crimping rate was 7.9%
  • the charging potential was as high as ⁇ 66 V in the conductive performance evaluation on a carpet.
  • the result of the overall evaluation was C and at an unacceptable level.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Multicomponent Fibers (AREA)
US16/647,257 2017-09-28 2018-09-26 Conductive composite fiber Abandoned US20200216984A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2017188003 2017-09-28
JP2017-188003 2017-09-28
PCT/JP2018/035573 WO2019065681A1 (ja) 2017-09-28 2018-09-26 導電性複合繊維

Publications (1)

Publication Number Publication Date
US20200216984A1 true US20200216984A1 (en) 2020-07-09

Family

ID=65902302

Family Applications (1)

Application Number Title Priority Date Filing Date
US16/647,257 Abandoned US20200216984A1 (en) 2017-09-28 2018-09-26 Conductive composite fiber

Country Status (6)

Country Link
US (1) US20200216984A1 (ja)
EP (1) EP3690088A4 (ja)
JP (1) JP7107226B2 (ja)
KR (1) KR20200058378A (ja)
CN (1) CN110945167A (ja)
WO (1) WO2019065681A1 (ja)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN146424B (ja) 1976-04-29 1979-06-02 Dow Badische Co
JPH0819569B2 (ja) * 1985-05-20 1996-02-28 東レ・モノフィラメント株式会社 導電性ブラシ用毛材
JPH09268418A (ja) * 1996-03-26 1997-10-14 Toray Ind Inc 溶融紡糸用口金パック
JP2001049532A (ja) * 1999-08-03 2001-02-20 Kuraray Co Ltd 導電性複合繊維
ES2232367T3 (es) * 1999-10-06 2005-06-01 Kuraray Co., Ltd. Fibra de material compuesto electricamente conductora.
JP2003105634A (ja) * 2001-09-28 2003-04-09 Unitica Fibers Ltd 導電糸
JP2003278031A (ja) 2002-03-18 2003-10-02 Toray Ind Inc 高耐久性導電性繊維
JP2004036040A (ja) 2002-07-03 2004-02-05 Unitica Fibers Ltd 制電性織編物及び防塵衣
CN101331251B (zh) * 2005-10-21 2012-12-05 可乐丽股份有限公司 导电性复合纤维及其制备方法
JP2007113151A (ja) * 2005-10-21 2007-05-10 Toray Ind Inc スクリーン紗用ポリエステルモノフィラメントの溶融紡糸方法及びスクリーン紗用ポリエステルモノフィラメント
JP2007224447A (ja) * 2006-02-23 2007-09-06 Toray Ind Inc 導電性複合繊維およびその製造方法
CN201593077U (zh) * 2009-12-30 2010-09-29 北京中纺优丝特种纤维科技有限公司 一种高性能碳黑型导电纤维
JP5703785B2 (ja) * 2010-01-29 2015-04-22 東レ株式会社 複合口金
US8969224B2 (en) 2010-01-29 2015-03-03 Toray Industries, Inc. Sea-island composite fiber, ultrafine fiber, and composite spinneret

Also Published As

Publication number Publication date
JPWO2019065681A1 (ja) 2020-09-10
WO2019065681A1 (ja) 2019-04-04
JP7107226B2 (ja) 2022-07-27
KR20200058378A (ko) 2020-05-27
EP3690088A4 (en) 2021-06-30
EP3690088A1 (en) 2020-08-05
CN110945167A (zh) 2020-03-31

Similar Documents

Publication Publication Date Title
US4207376A (en) Antistatic filaments having an internal layer comprising carbon particles and process for preparation thereof
EP0399397B1 (en) Sheath-core spinning of multilobal conductive core filaments
US7767298B2 (en) Electrically conductive composite fiber and process for producing the same
EP2037015B1 (en) Conductive sheath-core conjugate fiber and process for producing the same
US6413634B1 (en) Electrically-conductive composite fiber
US5202185A (en) Sheath-core spinning of multilobal conductive core filaments
US5318845A (en) Conductive composite filament and process for producing the same
US7094467B2 (en) Antistatic polymer monofilament, method for making an antistatic polymer monofilament for the production of spiral fabrics and spiral fabrics formed with such monofilaments
US5260013A (en) Sheath-core spinning of multilobal conductive core filaments
US20090047516A1 (en) Conductive composite fiber and method for producing same
US20200216984A1 (en) Conductive composite fiber
EP0343496A2 (en) Conductive composite filament and process for producing the same
JPS6350446B2 (ja)
JP6118561B2 (ja) 導電性複合繊維
JP5254532B2 (ja) 導電性ポリエステル繊維
JP3958227B2 (ja) 混繊糸
JP7340183B1 (ja) 芯鞘型ポリエステル複合繊維、及びその製造方法
JPS61132623A (ja) 導電性の優れた複合繊維
JP6420141B2 (ja) 導電性糸条およびその製造方法
CA2276193C (en) Sheath-core spinning of multilobal conductive core filaments
JP2014091869A (ja) 導電性複合ポリエステルモノフィラメントおよび工業用織物
JP2007224447A (ja) 導電性複合繊維およびその製造方法
JP2007284847A (ja) 導電性ポリエステル繊維
JPS63190017A (ja) 制電性複合繊維

Legal Events

Date Code Title Description
STPP Information on status: patent application and granting procedure in general

Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION

AS Assignment

Owner name: TORAY INDUSTRIES, INC., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:YAMAGUCHI, SUMIO;MURATA, SHO;KANEMORI, YASUNORI;SIGNING DATES FROM 20200914 TO 20200918;REEL/FRAME:053867/0821

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: FINAL REJECTION MAILED

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION