Classifications

• • 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
• • 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
  • Y10S260/00—Chemistry of carbon compounds
  • Y10S260/15—Antistatic agents not otherwise provided for
• • 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
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/23907—Pile or nap type surface or component
  • Y10T428/23979—Particular backing structure or composition

Definitions

• This invention relates to manufacture of carpet having very low static charging, and, more particularly, to an improved method of antistatic processing of the carpet.
• Known type of carpet is mostly manufactured from woven cloth of hemp or cotton yarn as the base, into which other fibrous material such as wool, polyester, nylon, etc. are enmeshed so as to be flocked thereinto. Also, in most cases, a rubbery material is coated on or impregnated in the base cloth as a binder with a view to securing adhesion between the base cloth and the flocking.
• the characteristic point of the present invention is to mix carbon fibers with rubbery or plastic material as a binder, outer appearance of the flocked fibers is not impaired, because the carbon fiber does not appear on the flocked surface. Hence, it is possible to manufacture carpet in exactly same manner as in the ordinary carpet production.
• Carbon fibers to be used in the present invention designate generally carbonaceous or graphitic fiber of electroconductive property. Diameter of a carbon monofilament usually ranges from about 3 microns to about 30 microns, and its length ranges in average between 0.5 mm. and 10 mm. Over 10 mm. of the fiber length, it becomes difficult to uniformly disperse the carbon fiber in the binder by kneading, and to cause the carbon-fiber-containing binder to be uniformly coated on or impregnated in the base cloth. Less than 0.5 mm. of the fiber length, electroconductive effect in the product becomes low.
• Adding quantity of carbon fiber to the binder should preferably be from 0.1 to 10.0% by weight with respect to parts by weight of the solid content of the binding material. Quantity of less than 0.1% by weight of the carbon fiber would not produce the electroconductivity in the binder to a suflicient degree. Excessive quantity over 10.0% by weight results in diificulty in coating or impregnating operation.
• the adding quantity is in any way determined in relation to the fiber length.
• the carbon fiber has its specific gravity of about 1.5 to 1.9, and is smaller than that of stainless steel fiber by a few fractions, its volume becomes several times as large as that of stainless steel fiber for the same weight, hence the desired effect of electroconductivity can be easily exhibited.
• Material for the binder may be those available in the market such as natural rubber, butadiene-styrene rubber (SBR), butadiene-acrylonitrile rubber (NBR), polyvinyl chloride (PVC), polyethylene, polyurethane, and so on.
• SBR butadiene-styrene rubber
• NBR butadiene-acrylonitrile rubber
• PVC polyvinyl chloride
• polyethylene polyurethane, and so on.
• the antistatic effect may be suificiently exhibited by adding a predetermined quantity of electroconductive carbon fiber to the binding material alone, so that any complicated process such as mixing or interweaving the carbon fiber with the flocking fiber or the base cloth is no longer necessary.
• the carbon fiber, once mixed with the binding material is no longer required to be subjected to bending action due to external force, against which the carbon fiber is most fragile, hence the resultant article of manufacture is durable enough against external force and has wide varieties of use.
• Carbon fibers of an average length of about 3 mm. and a diameter of about 7 microns was mixed with the liquid rubber component at the mixing ratios of 0.5% by Weight and 2.0% by weight, respectively, with respect to the solid rubber content.
• the quantity of the rubber component applied to the base cloth was 150 g./m. and 3,600 g./m. for the respective test pieces of diiferent carbon fiber contents.
• test pieces of 3 cm. x 4 cm. were cut out.
• the specimens were subjected to test for measuring the charged value of static electricity by means of a rotary static tester (produced by Koa Shokai Co., Japan).
• the test results are shown in Table 1 below, from which remarkable antistatic effect is recognized with the binder containing the carbon fiber.
• EXAMPLE 4 Carbon fiber of about 12 microns in diameter and about 3 mm. in average length was added to liquid SBR No. Y-460 (product of Yokohama Rubber (30., Japan) at a ratio of 0.3% by Weight with respect to the solid rubber content to prepare a binder. This binder was applied onto carpet made of base hemp cloth and woolen pile having fiber length of 6 mm. in a quantity of 500 g./m. and then the carpet was dried.
• liquid SBR No. Y-460 product of Yokohama Rubber (30., Japan
• EXAMPLE 2 300 g./m. of SBR binder was coated on carpet produced from woven base cloth of cotton yarn and woolen pile of 6 mm. fiber length.
• binder For comparisons sake, following three kinds of the binder were prepared: (1) SBR alone; (2) SBR 5 Wt. percent of stainless steel fiber of about 7 microns in diameter and about 5 mm. in average length; and (3) SBR 5 wt. percent of carbon fiber of about 7 microns in diameter and 5 mm. in average length.
• the binder was impregnated in carpets made of a base hemp cloth and nylon piles having fiber length of 3 mm. and 6 mm., respectively, so that the final quantity of the binder as applied to the respective carpets may be 500 g./m. and then the carpet was dried.
• Another carpet for comparison purpose was also manufactured in the same manner, except that no carbon fiber was added to the binder. Test pieces were taken from each of these caryarn, and woolen pile, in which the same metallic filament is enmeshed in the same amount as the base cloth. It was found that the static charging in the carpet according to the present invention was very small.
• a method for preventing static charge in a pile carpet pets and tested for the static voltage after 60 seconds which comprises binding the base cloth for the carpet and pile with a binder selected from the group consisting of natural rubber, butadiene-styrene rubber, butadieneacrylonitrile rubber, polyvinyl chloride, polyethylene and polyurethane, containing therein a uniform dispersion of 0.1-10% by weight of carbon fibers having a single fiber length of 05-10 mm. and a diameter of 3-30 microns, based on the weight of the solid content of the binder, and drying the treated carpet.
• a binder selected from the group consisting of natural rubber, butadiene-styrene rubber, butadieneacrylonitrile rubber, polyvinyl chloride, polyethylene and polyurethane

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Elimination Of Static Electricity (AREA)
• Laminated Bodies (AREA)
• Carpets (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)
• Nonwoven Fabrics (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Woven Fabrics (AREA)
• Adhesives Or Adhesive Processes (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=12027358

Family Applications (1)

Country Status (5)

Cited By (9)

Families Citing this family (2)

• 1970
  • 1970-03-12 JP JP2044970A patent/JPS50985B1/ja active Pending
• 1971
  • 1971-03-10 US US3746573D patent/US3746573A/en not_active Expired - Lifetime
  • 1971-03-11 DE DE19712111663 patent/DE2111663A1/de active Granted
  • 1971-03-12 SU SU1632476A patent/SU507212A3/ru active
  • 1971-04-19 GB GB2387771A patent/GB1330564A/en not_active Expired

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