Classifications

• • 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
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
  • D06M13/372—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen containing etherified or esterified hydroxy groups ; Polyethers of low molecular weight
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
• • 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
  • Y10T428/23986—With coating, impregnation, or bond
• • 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
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31725—Of polyamide
  • Y10T428/31739—Nylon type

Definitions

• naertenomo ORV-THE INVENTION misinvention relates to a. shockrproof carpet system based onnylon...More.- particularly -it relates to an improved. carpet; system based on nylon made shock-proof by oi certain additives. And, still moreparticularly -it relates tma-carpetfsystem. based on'nylon made shockproofby use-of-radditives that actually improve its shock proofness as the carpet systernwears.
• Carpet systems are well'ldiotiv n'to generate considerable chargesof:-statie elect:ricity: when ,a person in contact therewith traversestheearpetsystems fibrous layer.
• Such charges are-quite naturally-iransfer'r'ed to the person trayersingsaid carpetsystem and. upon. grounding, the charges are discharged causing momentary. shockand a source of pensionable irritation.-,And,;although several carpet systems have been devisedirt an effort to improve this system, all tend to becoriie 'less and'l'e ss viable with use.
• One sdhf' static-dis'chargingzfloor covering. system is disclosed in-UaS.
• a prime objectof this invention is to provide a permanent shock-proof carpet system.
• Another object of this invention is to provide a permanent shock-proof nylon carpet system.
• a further object of this invention is to provide a permanent shock-proof nylon carpet system ,wherein the additives utilized in making such carpet system are maintained and utilizable in the carpet system throughout the life of the carpet system.
• a still further object of this invention is to provide a permanent shock-proof nylon carpet system wherein the static electricity buildup is lower than the threshold of sensitivity to humans.
• a still further object of this invention is to provide a permanent shockproof nylon carpet system wherein the static electricity buildup gets actually lower or improves its shock-proof elfectiveness with normal use.
• R is a difunctional radical from a hydrocarbon containing 1 to 13 carbon atoms, and at least one compound selected from the group consisting of diepoxidesand compounds which yield the following divalent radicals:
• R is a difunctional radical derived from aromatic, heterocyclic, cycloaliphatic or aliphatic hydrocarbons or combinations of them having said fibrous pile secured to a primary backing, a. fine gauge metallic screen or mat of metal fibers, and an adhesive conductive latex backing added thereto.
• The. adhesive" conductive latex is made conductive by containing up to ten weight percent of said latex from a compound selected from the group consisting of the reaction product of a compound represented by the formula:
• the antistatic fiber of this invention can contain certain conventional additives without any adverse effects upon the overall shock-proof carpet system of this invention. That is, the carpet system of this invention is compatible in all instances with other additives, naturally either necessary or desirable, such as, dyeing assists and colorants, stabilizers, antioxidants and delustrants among others.
• the fine gauge metallic screen can be prepared from any ductile conductive material, such as various steel alloys, copper, etc.
• such improved shock-proof carpet system of this invention not only provides a shock-proof carpet system initially below the threshold of sensitivity to humans, but actually improves its shock-proof effectiveness with use.
• Such threshold of sensitivity to humans has been established at between approximately about 2,500 to about 4,000 volts. See Modern Textiles, April 1971 publication, article A Shock-Free Carpet System at 10% Relative Humidity and papers of the American Association For Textile Technology, Inc. by D. H. Martin, R. D. Radford and K. R. Lea.
• Another static test procedures for textiles is described in technical bulletin No. 2-015, dated Mar. 1, 1970 by Brunswick Corporation, Technical Products Div., 69 W. Washington, St., Chicago, Ill. 60602.
• Polycaproamide polymer is used having a moisture content of 0.05% to 0.10%, total constituents extractable by hot water of 1% to 2%, and formic acid relative viscosity of 62.
• the polymer contains about 0.2% titanium dioxide dulling agent, antioxidant, and 6% of an antistatic agent consisting of a polyether of dimethylterephthalate and Tetronic 1504 supplied by Wyandotte and covered under US. Pat. 2,979,528 by Lunsted.
• the Tetronic 1504 is one of many tetrol compounds commercially available as tetronic series block copolymers having molecular weights between 1,650 and 26,000. This series varies in length of poly(oxyethylene) chain and poly(oxypropylene) chain.
• a 3 and 4 digit code numbed indicates the molecular composition. When four digits are employed, the first two explain the average molecular weight of the hydrophobe (poly(oxypropylene) branches on the alkylenediamine). When three digits are used only the first number serves this purpose. The last digit of each code number represents the weight percentage of hydrophilic (poly(oxyethylene) units to the nearest 10%
• the antistatic material is metered at the hopper with the polycaproamide polymer and both are fed into a screw extruder having an exit temperature of 260 C. The polymer is forwarded at a pressure of 1,900 p.s.i.g.
• the freshly extruded filaments descend a spinning tower into which air conditioned at 70 F. and 65% relative humidity is admitted.
• the yarn emerging from the spinning tower contacts a ceramic roll applies a lubricant finish, and the yarn then is wound onto a package at 1,850 feet per minute.
• the yarn thus obtained has a denier of 3,150, is drawn over a /3; inch diameter draw pin at a delivery rate of 1,536 feet per minute which is 3.01 times the feed rate in order to obtain a drawn yarn denier of 1,050 denier.
• Each of the 70 filament has a denier of 15.
• the yarn is passed 5 wraps over a shoe-type heater maintained at 175 C.
• the yarn is then subjected to a continuous stutter box crimping operation and two ends of 1,050 denier are combined and 4 twisted together to produce a 2,250 denier, filament With a 8" type twist yarn.
• the yarn is then employed in making a level loop pile tufted carpet having twenty ounces of fiber per square yard of carpet and employing a spun-bonded polypropylene backing scoured, dyed at 212 F, rinsed and dried.
• the carpet is then double backed with a latex consisting of styrene butadiene rubber having five weight percent of low molecular weight polyethylene oxide antistatic material.
• the antistatic properties of this carpet as determined by the Walk Test method wherein the temperature is controlled at 71 F. and the relative humidity is controlled at 20% are compared in Table I with control carpets.
• EXAMPLE 2 2,200-l40 denier textured nylon 6 yarn containing 6% of a polyether of DMT and Tetronic 1504 and 0.2% of anti-oxidant was tufted on Typar primary backing into 20 oz./yd. level loop carpet. The carpet was subsequently piece dyed in a dye bath and dried. A fine gauge steel screen was then added to the backing of the carpet while this was simultaneously back-coated with Uniroyal Latex GX-2179, a styrenebutadiene base latex containing an electrically conductive material. After Locktuft secondary backing was added and the carpet cured, the. carpet was tested for static generation according to the Walk Test Method. Results of the test showed that the static voltage generated at 21 C. and 20% RH. was below 3,000 volts.
• EXAMPLE 3 As in Example 1, with the exception that the metal screen was replaced with metal fibers uniformly dispersed in the Uniroyal conductive latex prior to carpet coating, the metal fibers having a diameter of 0.01-0.05 inch and a length of 1 inch retained fiber to fiber contact in the cured latex sandwiched between the two carpet backings.
• EXAMPLE 4 As in Example 2, with the exception that metal filaments having a diameter of 0.01-0.5 inch were woven into primary and secondary backings prior to the application of the conductive latex. Metal to metal contact was maintained in the carpet backing structures.
• EXAMPLE 5 As in Example 2, with the exception that nylon 2.0/1 to 4.0 2" yarn spun from staple was used to produce 32 oz./yd. plush carpet.
• the maximum voltage generated in kv. in the Walk Test is 2.4 intially. It shows 2.2 after 20M treads and 2.0 after 40M treads.
• EXAMPLE 8 As in Example 1, except that 400 ends of undrawn yarn are combined into a tow. The tow is drawn, crimped and cut into 6.5 inch long staple, all in a continuous operation. The staple is then spun into a 2.25 with 3.5 Z twist and converted into 40 oZ./yd. cut pile plus type carpets. The maximum voltage generated in kv. in the Walk Test is 2.3. After 20M treads it dropped to 2.2 and after 40M treads it dropped to 2.01.
• EXAMPLE 9 As in Example 1, except that nylon 6,6 polymer is used. Continuous and staple yarns are prepared and the results in the carpets were as follows: initial kv. is 2.9; after 20M treads, 2.1 kv.; and after 40M treads the kv. is 1.5.
• EXAMPLE 10 As in Example 1, except the yarn internal antistatic additive is added in an amount of 10 weight percent of the polymer. The resulting maximum voltage in the carpet is equivalent to results in Table 1.
• EXAMPLE 11 As in Example 1, except the yarn internal antistatic additive is also used in the conductive latex. The resulting maximum voltage in the carpet is equivalent to results in Table I.
• the products of this invention are useful for many purposes, for example, for more or less routine type carpeting areas having about 35% RH. (relative humidity).
• This invention can be used wherein just the fiber has the antistat additive therein and the carpet system yields a system having a static level less than about 3 kilovolts or 3,000 volts, that is, a shock level undetectable by most people.
• this invention can be used wherein the fiber and the conductive latex having the antistat additive therein yields a carpet system having a static level less than about 3 kilovolts or 3,000 volts, that is, a shock level undetectable by most people.
• this invention can be used wherein the fiber, the conductive primary and secondary backing has the antistat additive therein of this invention as well as a fine gauge metallic screen, film or mat of metal fibers between said backings.
• said coating also containing an additive to reduce buildup of static electricity
• the improvement consisting essentially of using for said adidtive to reduce buildup of static electricity in said face fiber between about 1 percent and about 12 percent by weight of a predominantly branched chain-extended compound represented by the formula where a, b, c, d, w, x, y, and z are each a whole number and R is a difunctional radical from a hydrocarbon containing 1 to 13 carbon atoms, and at least one compound selected from the group consisting of diepoxides and compounds which yield the following divalent radicals:
• R is a difunctional radical derived from aromatic, heterocyclic, cycloaliphatic or aliphatic hydrocarbons or combinations of them, whereby said textile article will generate less than 3 kilovolts of static electricity by the walk test and the static electricity buildup gets lower with normal use of said textile article.
• polyamide is selected from the group consisting of polycaproamide and polyhexamethylene adipamide.
• said metallic conductors are a metallic mat made of conductive metal fibers uniformly dispersed in the conductive latex.
• said metallic material is made of filaments having a diameter of from about 0.01 to 0.5 inch.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Carpets (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Artificial Filaments (AREA)

Priority Applications (10)

Applications Claiming Priority (1)

Publications (1)

Family

ID=23042388

Family Applications (1)

Country Status (9)

Cited By (4)

• 1972
  • 1972-07-19 US US00273064A patent/US3827931A/en not_active Expired - Lifetime
• 1973
  • 1973-07-11 DE DE19732335149 patent/DE2335149A1/de active Pending
  • 1973-07-17 CH CH1043973D patent/CH1043973A4/xx unknown
  • 1973-07-17 IT IT26680/73A patent/IT991236B/it active
  • 1973-07-17 AT AT628173A patent/AT335968B/de not_active IP Right Cessation
  • 1973-07-17 CH CH1043973A patent/CH585039B5/xx unknown
  • 1973-07-19 FR FR7326554A patent/FR2192912B1/fr not_active Expired
  • 1973-07-19 NL NL7310075A patent/NL7310075A/xx unknown
  • 1973-07-19 BE BE133649A patent/BE802549A/xx unknown
  • 1973-07-19 LU LU68053A patent/LU68053A1/xx unknown

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