Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
  • D02G3/441—Yarns or threads with antistatic, conductive or radiation-shielding properties
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
  • D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
  • D03D15/533—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads antistatic; electrically conductive
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
  • D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
  • D06M11/74—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
  • D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
  • D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
  • D06N7/0005—Floor covering on textile basis comprising a fibrous substrate being coated with at least one layer of a polymer on the top surface
  • D06N7/0039—Floor covering on textile basis comprising a fibrous substrate being coated with at least one layer of a polymer on the top surface characterised by the physical or chemical aspects of the layers
  • D06N7/0042—Conductive or insulating layers; Antistatic layers; Flame-proof layers
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06Q—DECORATING TEXTILES
  • D06Q1/00—Decorating textiles
  • D06Q1/04—Decorating textiles by metallising
• • 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
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S428/00—Stock material or miscellaneous articles
  • Y10S428/922—Static electricity metal bleed-off metallic stock
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S57/00—Textiles: spinning, twisting, and twining
  • Y10S57/901—Antistatic
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
  • Y10T442/3049—Including strand precoated with other than free metal or alloy
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
  • Y10T442/3382—Including a free metal or alloy constituent
  • Y10T442/339—Metal or metal-coated strand
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/40—Knit fabric [i.e., knit strand or strip material]
  • Y10T442/419—Including strand precoated with other than free metal or alloy
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/40—Knit fabric [i.e., knit strand or strip material]
  • Y10T442/475—Including a free metal or alloy constituent

Definitions

• This invention relates to cloth having durable antistatic properties for use in garments and underwear.
• the organic textile fibers have generally the drawback of becoming charged with static electricity upon being subjected to friction, especially when they are used at low humidity. This tendency is especially marked in the case of hydrophobic fibers, for example, synthetic fibers such as polyamide, polyester, acrylic and polyolefinic fibers and semi-synthetic fibers such as acetate and triacetate fibers.
• This electrification phenomenon causes troubles such as the occurrence of sound of electrostatic discharge, clinging of garments to a human body and electric shock.
• a knitted or woven cloth having durable antistatic properties for use in garments and underwear, said cloth containing about 0.005 to about 10% by weight of an electrically conductive fiber, characterized in that said electrically conductive fiber comprises a substrate of chemical fiber and an electrically conductive coating formed thereon, said coating consisting of a binder polymer matrix having dispersed therein finely divided powder of an electrically conductive material sufficient to adjust the electrical resistance of the electrically-conductive fiber so as not to exceed about 10 SZ/cm., and said electrically conductive fiber having the functional properties of textile fibers.
• fiber used in the specification and appended claims includes both staple fibers and continuous filaments.
• the electrically conductive fiber to be incorporated into a knitted or woven cloth according to the invention comprises a substrate of chemical fiber and an electrically conductive coating formed thereon, and has the functional properties of textile fibers.
• textile fibers By the term functional properties of textile fibers, as here used, is meant, in general, the possession of mechanical properties by which a fiber can be subjected to the usual spinning, twisting, crimp-imparting, weaving and knitting operation and can stand such conditions which a fiber usually encounters during these processing steps as well as during its used, i.e. such conditions as abrasion, tensile stress, bending stress, repetitive fiexure, repetitive elongation and relaxation, and repetitive compression and relaxation; and the possession of compatibility and coprocessability With the usual organic textile fibers.
• the electrically conductive fiber to be used in the knitted and woven cloths according to the present invention should possess mechanical properties which are about comparable to those of the substrate of the chemical fiber.
• the electrically conductive fiber used should preferably possess not only the foregoing mechanical properties along the longitudinal direction but also its mechanical properties along the lateral direction such as flexibility and also its chemical properties such as its property to withstand the usual scouring, dyeing and washing operations.
• the electrically conductive fiber to be used in the present invention should generally possess a low density of less than 2.5 g./cc., and preferably a low density of less than 2.0 g./cc.
• fibers of linear synthetic polyamides such as nylon 6 and nylon 66 are preferably from the standpoint of mechanical properties and adhesiveness to the eltctrically-conductive coating.
• fibers of polyesters such as polyethylene terephthalate are preferable.
• fibers of other synthetic polymers are also usable such as those of polyolefinic polymers, acrylic polymers, polyvinyl acetal, polyurea, polyimide and blends thereof and cellulosic fibers composed of cellulose acetate or regenerated cellulose.
• the fineness of fibers is usually about to 50 denier, preferably about 10 to denier.
• the chemical fiber used as the substrate may be either in the form of monofilament or multifilament.
• the electrically conductive coating can be formed on the substrate fiber in the following manner.
• a solution or an emulsion of a binder polymer which contains dispersed therein finely divided metals, for example, silver, gold, platinum, copper, brass, nickel, aluminum, tungsten, as well as other finely divided electrically conductive materials such as copper oxide and carbon black is applied to the surface of the substrate fiber, following which the coating is dried and, as desired, the binder polymer is cured.
• the electrically-conductive finely divided powder finely divided powder of silver and carbon black are especially preferable in view of resistance to scouring, dyeing, Washing, and chemicals and in view of electrical conductivity.
• binder polymer Usable as the binder polymer are various synthetic resins such as acrylic, epoxy, phenolic, urethane, melamine, urea, polyester, vinyl and silicone resins, natural and synthetic rubbers, and mixtures of these. However, in each individual case, choice should be suitably made, taking into consideration the characteristics of binders such as their adhesiveness to the substrate fiber, the abrasion resistance and chemical resistance of the coating, and flexibility of the coated substrate fiber. Further, this liquid composition can be incorporated with a thickening agent, an anti-aging agent, a modifier for imparting flexibility to the coating, a curing agent for the binder polymer as well as other additives.
• suitable binder polymers included are the combinations of the oil-soluble phenolic resins with chloroprene polymer, styrene/butadiene copolymer, acrylonitrile/butadiene copolymer and other synthetic rubbers; the combinations of a bisphenol/epichlorohydrin type epoxy resin having an epoxy equivalent of about 170 to 250 with a polyamide resin, an epoxidized vegetable oil or liquid polyalkylene sulfide; a relatively low molecular weight polyurethane urea having terminal N,N-disubstituted ureylene groups; the combination of a partially saponified vinyl chloride/ vinyl acetate copolymer and a melamine resin modified by n-butanol; and the combination of ethyl acrylate/ styrene/hydroxyethyl acrylate copolymer with a melamine resin modified by n-butanol.
• the electrically-conductive fibers used in the invention should have an electrical resistance not in excess of about 10 Q/cm., because if the electrical resistance exceeds this limit, the woven or knitted cloth having antistatic properties as contemplated by the invention cannot be obtained.
• To manufacture electrically-conductive fibers having an electrical resistance not in excess of about 10 Q/cm. it is necessary to adjust the amount of finely divided powder of an electrically-conductive material present in the electrically-conductive coating, and the thickness of the coating.
• the content of metal in the coating must generally be at least by weight, preferably at least 75% by weight when the finely divided electrically conductive material is a metal such as silver, whereas the carbon content must be at least 5% by weight, preferably 10% by weight when it is carbon. Further, it is preferred, from the standpoint of stable conductivity, that the thickness of the coating should be at least about 0.3 micron in the case of finely divided metals, and at least about 0.5
• the upper limit of the thickness of the electrically conductive coating and the upper limit of the amount contained in the coating of the finely divided particles of the electricallyconductive material are restricted in actual use in view of the above-mentioned properties as the textile fiber, i.e., the functional properties as the textile fiber such as mechanical properties of the fiber and flexibility.
• a coating of excessive thickness is not only unnecessary from the standpoint of conductivity but also undesirable especially from the standpoint of fiexibiliy.
• a coating containing finely divided metals as its electrically-conductive material preferably should have an average thickness not exceding about 10 microns, preferably not exceeding about 5 microns.
• a coating containing carbon should have an average thickness not exceeding about 15 microns, preferably not exceeding 10 microns.
• coatings containing the finely divided metals in an amount exceeding about by weight or the carbon in an amount exceeding about 60% by weight are in general poor in their tenacity and their adhesiveness to the substrate and hence easily tend to become separated from the substrate during the procesing steps and in use.
• the knitted or woven cloth for use in garments and underwear according to the invention consists of organic textile fibers and a minor amount of said electrically-conductive fibers.
• the electrically-conductive fiber must be present in the knitted or woven cloth in an amount of at least 0.005% by Weight. Although it is possible at times to achieve the antistatic effects even with smaller amounts than indicated above, the effects are frequently not stable.
• the electrically-conductive fiber is incorporated at the ratio of about 2% to about 10% by weight, the degree of improvement in the antistatic effects corresponding to the increase of the electrically conductive fiber gradually decreases as the ratio approaches the latter value. Hence, the use of the electrically-conductive fiber in an amount in excess of about 10% by weight is unnecessary for practical purposes. Therefore, from a practical standpoint, the electrically-conductive fiber should be incorporated in the knitted or woven cloth at the ratio of about 0.005% to about 10% by weight, and preferably about 0.01% to about 2% by weight.
• the electrically-conductive fiber can be incorporated in a knitted or woven cloth for garments and underwears by mix spinning, doubling, mix twisting, mix weaving, mix knitting and other optional means.
• an electrically-conductive yarn containing an electrically-conductive fiber is prepared from the electrically-conductive fiber and an ordinary organic textile fiber. It is convenient to prepare a knitted or woven cloth by using only the electrically-conductive yarn or to prepare it from the electrically-conductive yarn and an ordinary non-electricallyconductive weaving or knitting yarn by an ordinary mix weaving or mix knitting.
• the intended woven or knitted cloth by mix weaving or mix knitting of an electrically-conductive spun or filamentary yarn consisting only of electrically-conductive fibers with an ordinary non-electrically-conductive weaving or knitting yarn. It has been found that it is advantageous and preferable to incorporate the electrically-conductive fiber in the form of continuous filaments. For instance, when the knitting or weaving yarns are spun yarns, the incorporation of electrically-conductive fibers can also be efiected by using spun yarns containing electrically-conductive fibers as part of these knitting or weaving yarns.
• One advantageous method of producing a knitted or woven cloth according to the invention includes conducting weaving or knitting while paralleling continuous electrically-conductive filaments, advantageously paralleling one electrically-conductive monofilament, with part or whole of non-electricallyconductive weaving or knitting yarns to be made into the knitted or woven cloth. It has been confirmed that a more excellent and more stable antistatic effect can be obtained by incorporating the electrically-conductive fibers in the form of continuous filaments than by doing it in the form of staple fibers. As a matter of course, the form of continuous filament is more advantageous for producing such an antistatic cloth.
• an electrically-conductive filament in the form of at least one, advantageously one, monofilament with an ordinary organic textile filament bundle, subjecting them to a mechanical crimping, and to use them as a part or whole of the weaving or knitting yarns.
• the weaving and knitting yarns should contain an electricallyconductive filament. So long as the content of the electrically-conductive fiber in the knitted or woven cloth is at least about 0.005% by weight, a remarkable antistatic effect can be achieved, even if the distance between an electrically-conductive yarn and an adjacent electricallyconductive yarn is considerably large.
• the distance between electrically-conductive yarns should be chosen according to the purpose of using the knitted or woven cloth and the desired antistatic effect. Like the content of the electrically conductive fiber as mentioned above, this distance is an important factor for giving an antistatic effect to a knitted or woven cloth for garments and underwear.
• the distance between electrically-conductive yarns in a knitted or woven cloth is less than cm., preferably less than 10 em, all of the garments sewn from this cloth are almost free from a phenomenon of the bottom flaring or sound of static discharge when putting off the garments. In the case of slips or skirts, clinging to the human body during wearing is hardly seen if this distance is less than 10 cm., preferably less than 5 cm.
• a cloth having electrically-conductive yarns incorporated therein at shorter intervals gives an increased antistatic effect. If a person wearing a working garment made from this cloth, the charged voltage of the garment and the wearer during wearing and at the time of putting off is restrained very low without worry about discharge or shock.
• the obtained cloth possesses not only an excellent antistatic effect but also a shielding effect of electro-static flux lines. Thus, it can be made into working wears for persons dealing with electronics and with high voltage live lines.
• the electrically-conductive fibers used in the present invention include not only those in which an electric resistance is in the region of an ordinary conductor, but also those in which an electric resistance is very high such as 10 .Q/cm. It is surprising that a marked antistatic effect is exhibited even when a small amount of a fiber having such high electric resistance is incorporated. It is not easy to explain the mechanism of prevention of electrification with simplicity. Generally, a high voltage above 1000 volts poses a problem in an unfavorable electrification of ordinary organic textile fibers, and a quantity of electrostaticity generated at this time is very small.
• the electrically-conductive fibers used in the present invention retain the functional properties of textile fibers and have durability against various conditions that are usually encountered during the manufacture of woven or knitted cloths for use in garments and undewear and during their use, such as abrasion, repetitive flexure, repetitive elongation and relaxation, scouring, dyeing and Washing.
• the electrically-conductive fibers of this invention can be incorporated in the knitted or woven cloth very readily during their manufacture.
• the cloths according to the present invention which contain a small amount of the electrically-conductive fibers have durable antistatic properties, and their appearance and hand are also highly satisfactory. Further, these electrically-conductive fibers are compatible with the other fibers that make up the cloths, and therefore, their tendency to separate from the surface during the use of the cloth is slight.
• the knitted or woven cloths for garments and underwear according to the invention may be either weave cloth such as plain weave cloth, twill cloth, satin cloth and other fancy weave cloth, or knitted cloth such as weft knitted cloth and warp knitted cloth.
• weave cloth such as plain weave cloth, twill cloth, satin cloth and other fancy weave cloth
• knitted cloth such as weft knitted cloth and warp knitted cloth.
• the resistance of the electricallyconductive fiber shown in the eamples was determined by using an FM tester, Model L-19-B and an automatic insulation-ohmmeter, Model L-68, manufactured by Yokogawa Electric Works, Japan, and breakage tenacity, breakage elongation and initial Youngs modulus were measured using a sample of 5 cm. of gauge length with a stretching speed of 5 cm./min.
• the value of the electrification voltage was measured by means of a collecting type potentiometer, Model K-325, manufactured by Kasuga Electric Company, Japan.
• the content of the electrically-conductive fiber is presented in percentage by weight of the electrically-conductive fiber based on the organic textile fiber which constitutes the knitted or woven cloth.
• EXAMPLE 1 A IS-denier nylon-6 monofilament was passed through a paste consisting of a mixture of finely divided flasky silver having an average particle size of 1.5 microns and a nitrile rubber-phenol type adhesive (solid content 24%) in the ratio respectively as indicated in Table A, at a feed rate of 25 m./min., and then passed through a slit to adjust its coating thickness. Thereafter, the monofilament was passed through a hot air oven at 70 C. for 6 seconds, and then through an air bath at C. for 6 seconds. An electrically-conductive monofilament having an electrical resistance indicated in Table A was obtained respectively.
• a IS-denier nylon-6 monofilament was passed through a paste consisting of a mixture of acetylene black and a nitrile rubber-phenol type adhesive (solid content 24%) in the ratio respectively as indicated in Table B, at a feed rate of 25 m./min., and then passed through a slit to adjust its coating thickness. Thereafter, the monofilament was passed through a hot air oven at 70 C. for 6 seconds, and then through an air bath at 190 C. for 6 seconds. An electrically-conductive monofilament having an electrical resistance indicated in Table B was obtained respectively.
• each of the said electrically-conductive monofilamtnts was doubled with 75 denier/36 filament polyethylene tercphthalatc multifilamcnts, and the resulting filament bundles were woven in so that they were arranged at intervals of 2 cm. in the warp and weft directions.
• the ratio of the electricallyconductive filament incorporated into the plain weave emulsion type; solid content 42% 3.5 parts of an aqueous solution of melamine resin (solid content 50%) and a small amount of a catalyst was prepared.
• the above-mentioned electrically-conductive monofilament was doubled with a 50 denier/24 filament polyethylene tcrephthalate multifilamcnt to form an electricallyconductive yarn.
• a tricot fabric for shirts was knitted from the resulting electrically-conductive yarn and the said polyethylene terephthalate multifilamcnt yarn so that the electrically-conductive yarn was arranged in the warps at intervals of 5 cm.
• Mcns shirts were sown by using the resulting fabric.
• the content of the electricallyconductive filament incorporated was 0.06% for (A) and 0.05% for (B).
• EXAMPLE 3 A -denier polyethylene terephthalate filament was passed through a well mixed paste consisting of 10 parts of finely divided copper having an average particle size of about 10 microns and parts of an acrylic resin type adhesive (solvent type; solid content 10%), and passed through a slit to adjust its coating thickness, followed by hardened by heating it in hot air. There was obtained an electrically-conductive filament having an average electrical resistance of 1000 MQ/cm. and an average coating thickness of 1.4 microns.
• the obtained electrically-conductive filament had a breakage tenacity of 3.6 g./den. (4.9 g./den. calculated on the basis of the denier of the substrate filament), a breakage elongation of and an initial Youngs modplus of 1100 kg./mm. It had tenacity, pliability and flexibility which are little different from those of the substrate filament, and was light in weight as demonstrated by a specific gravity of 1.6.
• a cloth having incorporated herein this electricallyconductive filament and a cloth containing no electricallyconductive filament were each scoured, and their electrification voltage was measured in the same manner as in Example 1 by rubbing them with a cloth of an acrylic fiber.
• the cloth having no electrically-conductive filament exhibited an electrification voltage of +7,300 volts, whereas the cloth containing the electrically-conductive filament showed only +350 volts, exhibiting a very excellent antistatic effect.
• a skirt sewn by using the cloth obtained in this example did not cling to legs nor flare at all, and beautiful proportions could be retained.
• a skirt sewn by using the plain weave cloth containing no electrically-conductive filament violently clung to legs or creep up legs, so that it was very uncomfortable to the wearer.
• EXAMPLE 4 An electrically-conductive monofilament (specimen A 2 obtained in Example 1) was laid together with two polyethylene terephthalate/cotton blend yarns (blend ratio being 65/35) of count and subjected to a final twist to form a ply yarn having electrically-conductivity. Using this yarn and an ordinary 30-count ply yarn having no electrically-conductivity, a polyethylene terephthalate/cotton twill cloth was woven by arranging the electrically-conductive yarn in the warp direction at various intervals indicated in the following table. Working wears were sewn by using the resulting twill cloths.
• Each of these working wears was Washed for 20 minutes in a warm water at 60 C. containing 1 g. per liter of a nonionic detergent, and dried after removing the de- 10 tergent thoroughly.
• a person wearing insulated shoes put off each of these wears, and an undressing test was conducted at 24 C. and RH.
• chloroprenephenol type adhesive polychloroprene/p-t-butylphenol-formaldehyde resin: 100/ solvent toluene; solid content 24%) were thoroughly mixed to prepare a paste.
• a plurality of S-denier nylon 6 monofilaments were paralleled as slightly spaced from each other, and simultaneously immersed in the paste while retained in the paralleled state. Then the filaments were passed through a slit to adjust the coating thickness, and cured by heating while retained at the small intervals to prevent their mutual adhesion. Thus they were covered with electrically-conductive coating.
• the filaments were bundled into one strand and taken up onto a winder, to provide an electrically conductive multi-filament yarn having an average electrically-conductive coating thickness of 1.2 microns, and an average resistance of l0MQ/cm. per single yarn.
• This electrically-conductive filament had a breakage tenacity of 4.5 g./den. (5.4 g./den. on the basis of the denier fineness of the substrate filament), a breakage elongation of 40%, an initial Youngs of 250 kg./mm. and a density of 1.2 g./cc.
• This electrically conductive multifilament yarn was mixed with an acrylic tow in advance of preparing therefrom acrylic staple fiber for making a plain weave cloth, andsubsequently the tow and the yarn were together subjected to a crimper to be crimped, followed by cutting to the length of 76 mm., to obtain a stable fiber incorporated with the electrically conductive fiber of the invention.
• the so incorporated electrically-conductive fiber showed crimpability similarly to acrylic fiber, but still retained suflicient electrically-conductivity.
• acrylic staple fibers (5 d. x 76 mm.) containing about 10% of the electrically-conductive staple fiber were obtained.
• 30-count spun yarns were prepared.
• This electrically-conductive spun yarn and 30-count ordinary spun yarn were woven to make a plain weave acrylic cloth was arranged in the warp and weft directions at intervals of 5 cm.
• the content of the electrically conductive fiber in the cloth was 0.08%.
• a test piece with a size of 10 cm. x 10 cm. was prepared from the obtained cloth. When this test piece was scoured, and then rubbed vigorously with a cloth of polyvinyl chloride fiber at 24 C.
• a knitted or woven cloth having durable antistatic properties for use in garments and underwear said cloth consisting of a yarn of elecrtrically non-conductive fiber and a yarn comprising said non-conductive fiber and an electrically conductive filament, said electrically conductive filament comprising a substrate of an organic synthetic filament of -50 denier and an electrically conductive coating formed thereon in a thickness of 0.3 to microns, said coating consisting of a resinous matrix and a material selected from the group consisting of finely divided silver, finely divided electrically conductive carbon black and mixtures thereof dispersed in said matrix in an amount suflicient to render the electrical resistance of said electrically conductive filament less than about 10 ohms/cm., said electrically conductive filament being present in an amount of about 0.0052% by weight of the entire knitted or woven cloth in the form of at least one continuous filament incorporated with said non-conductive yarn.
• said electrically conductive coating has an average thickness of 12 about 0.5 to 10 microns and contains dispersed therein about to by weight of finely divided powder of silver.
• said electrically conductive coating has an average thickness of about 0.7 to 10 microns, and contains dispersed therein about 5 to 60% by weight of finely divided powder of electrically conductive carbon.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Mechanical Engineering (AREA)
• Woven Fabrics (AREA)
• Artificial Filaments (AREA)
• Undergarments, Swaddling Clothes, Handkerchiefs Or Underwear Materials (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=27283874

Family Applications (1)

Country Status (7)

Cited By (41)

Families Citing this family (11)

• 1968
  • 1968-11-18 US US3586597D patent/US3586597A/en not_active Expired - Lifetime
  • 1968-11-20 GB GB5515568A patent/GB1253979A/en not_active Expired
  • 1968-11-20 FR FR1599850D patent/FR1599850A/fr not_active Expired
  • 1968-11-20 BE BE724170D patent/BE724170A/xx unknown
  • 1968-11-20 NL NL6816539A patent/NL6816539A/xx unknown
  • 1968-11-20 CH CH1729868D patent/CH1729868A4/xx unknown
  • 1968-11-20 CH CH1729868A patent/CH557438A/xx not_active IP Right Cessation
  • 1968-11-20 DE DE19681810060 patent/DE1810060A1/de active Pending

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