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WO2016191500A1 - Dispositif d'essuyage avec indicateur d'utilisation - Google Patents

Dispositif d'essuyage avec indicateur d'utilisation Download PDF

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Publication number
WO2016191500A1
WO2016191500A1 PCT/US2016/034189 US2016034189W WO2016191500A1 WO 2016191500 A1 WO2016191500 A1 WO 2016191500A1 US 2016034189 W US2016034189 W US 2016034189W WO 2016191500 A1 WO2016191500 A1 WO 2016191500A1
Authority
WO
WIPO (PCT)
Prior art keywords
cleaning article
fibrous sheet
antimicrobial agent
fibers
cleaning
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.)
Ceased
Application number
PCT/US2016/034189
Other languages
English (en)
Inventor
John Gavin Macdonald
Kaiyuan Yang
Thiago B. CHAR
Jorge A. DURAN
Carl G. Rippl
Juliana RESTREPO
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.)
Kimberly Clark Worldwide Inc
Kimberly Clark Corp
Original Assignee
Kimberly Clark Worldwide Inc
Kimberly Clark Corp
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 Kimberly Clark Worldwide Inc, Kimberly Clark Corp filed Critical Kimberly Clark Worldwide Inc
Priority to US15/575,449 priority Critical patent/US20180184876A1/en
Publication of WO2016191500A1 publication Critical patent/WO2016191500A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L13/10—Scrubbing; Scouring; Cleaning; Polishing
    • A47L13/16—Cloths; Pads; Sponges
    • A47L13/17—Cloths; Pads; Sponges containing cleaning agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
    • B08B1/14—Wipes; Absorbent members, e.g. swabs or sponges
    • B08B1/143—Wipes
    • 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
    • D06M13/402—Amides imides, sulfamic acids
    • D06M13/432—Urea, thiourea or derivatives thereof, e.g. biurets; Urea-inclusion compounds; Dicyanamides; Carbodiimides; Guanidines, e.g. dicyandiamides
    • 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
    • D06M13/46—Compounds containing quaternary nitrogen atoms
    • D06M13/463—Compounds containing quaternary nitrogen atoms derived from monoamines
    • 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
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • D06M15/03—Polysaccharides or derivatives thereof
    • 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
    • D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/14—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using phthalocyanine dyes without vatting
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/30—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using sulfur dyes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/673—Inorganic compounds

Definitions

  • the present invention relates to disposable cleaning articles having a use indicator for use in home and industrial cleaning applications.
  • Disposable wipers have been used heretofore for various industrial and home cleaning applications.
  • disposable wipers have been used for cleaning hard surfaces including, for example, countertops, floors, windows, appliances, equipment, tools, and so forth.
  • Numerous different materials are known and used for such cleaning applications.
  • the wiper can be used for a limited number of times before needing to be disposed of.
  • the wiper may still be physically intact but require disposal due to the presence of microorganisms acquired in the prior cleaning tasks.
  • microorganism contamination is a significant problem.
  • raw food products are often prepared on hard surfaces such as counters, tables, and the like.
  • Microbes e.g., viruses, bacteria, fungi, and the like
  • a cleaning towel or wiper that is used to clean the surfaces. After transfer, the microbes can remain on the wipe and begin to grow in numbers.
  • wipers containing certain antimicrobial agents have been employed. For instance, many of these wipers are treated and/or impregnated with anti-microbial agents that help prevent or inhibit the growth of microorganisms within the sheet. Further, in certain instances the applied antimicrobial agents can be released from the wiper to provide the liquid released from the wiper with a certain degree of antimicrobial activity. Quaternary ammonium chlorides have heretofore been used in such applications.
  • life-span indicators In order to help users assess when a particular wiper may need to be discarded, life-span indicators have heretofore been developed. In this regard, various indicators have been applied to a cleaning fabrics in an effort to provide the user with an indication of when the wipe should be discarded.
  • the present invention provides a pre-treated wiper which employs a durable life-span indicator that is triggered in direct relation to the loss of antimicrobial activity within the fabric and that functions in the presence of a wide range of cleaning liquids, including highly caustic and oxidative cleaners.
  • a cleaning article comprising a fibrous sheet having (i) cellulosic fibers with a cationic antimicrobial agent releasably attached thereto and (ii) cellulosic fibers with a complex releasably attached thereto, the complex comprising a dye and an antimicrobial agent.
  • the fibrous sheet has opposed first and second outer surfaces and, on at least the first surface, the complex is present on less than about 45%, or less than about 30%, of the area of the first surface of the fibrous sheet. Desirably, the complex is present on the first surface of the sheet such that it forms a graphic.
  • the antimicrobial agent (separate from that contained within the complex) can be present on greater than about 55%, 75% or even 90% of the first surface of the fibrous sheet.
  • the complex is stable against oxidation and reduction having an ORP of between 0 and 1 .61 V.
  • the complex is water stable and can comprise an ionic bond between the dye and the antimicrobial agent.
  • the dye can be selected from the group consisting of metallophthalocyanines, ultramarines, iron oxides, and derivatives thereof.
  • the antimicrobial agent can be selected from the group consisting of quaternary ammonium, biguanide compounds, chitosan, and derivatives thereof. Still further, the antimicrobial agent can be ionically bonded to the cellulosic fibers.
  • a cleaning article comprising a fibrous sheet of cellulosic fibers having first and second regions wherein the first region includes a complex formed by (i) a colored compound selected from the group consisting of a phthalocyanine compound, an ultramarine compound, an iron oxide compound, and/or a derivative thereof, and (ii) a cationic agent, wherein said complex is releasably attached to said cellulosic fibers by ionic bonding.
  • the second region of the fibrous sheet has a cationic antimicrobial agent releasably attached to the cellulosic fiber by ionic bonding and is substantially free of colored compounds selected from the group consisting of a phthalocyanine compound, an ultramarine compound, an iron oxide compound, and/or a derivative thereof.
  • the first region can comprise less than about 45%, about 30% or even about 10% of the surface area of said fibrous sheet.
  • the second region can comprise at least about 55%, at least about 70%, or even at least about 90% of the surface area of said fibrous sheet.
  • the antimicrobial agent and colored compound can comprise one or more of the agents identified herein.
  • the colored compound can comprise a phthalocyanine compound such as, for example, a metallophthalocyanine.
  • the antimicrobial agent can comprise one or more cationic agents such as, for example, one or more quaternary ammonium, chitosan and/or biguanide compounds.
  • Figure 1 is a top perspective view of a wiper of the present invention.
  • cellulosic means those materials comprising or derived from cellulose including natural or synthetic cellulose as well as that derived from both woody and non- woody sources.
  • continuous fibers means fibers formed in a continuous, uninterrupted manner having indefinite length and having a high aspect ratio (length to diameter) in excess of 100:1 ; in use such fibers having a length substantially the same as the length or width dimension of the wiper itself.
  • staple fibers means natural fibers or continuous fibers cut to length, such fibers having a length between about 0.5 mm and about 200 mm.
  • a "phthalocyanine compound” includes molecules having a phthalocyanine ring.
  • wet wipe refers to a fibrous sheet having had a liquid applied thereto and which is retained therein.
  • a wiper 10 is provided having a first outer surface 12, an opposed second outer surface 14 and a side edge 16.
  • the wiper 10 comprise cellulosic fibers, an antimicrobial agent and an indicator complex.
  • the cellulosic fibers of the wiper 10 are treated with and contain an antimicrobial compound (not shown) attached to the fibers by ionic bonding.
  • the first outer surface 12 of the wiper 10 also includes graphic elements 18 formed by those areas of the first surface 10 that have been treated with and contain the indicator complex.
  • the indicator complex is likewise releasably attached, by ionic bonding, to cellulosic fibers of the wiper 10.
  • the indicator complex is released by the wiper 10 commensurate with the release of antimicrobial agent.
  • the release and loss of the indicator complex and the graphic elements 18 provide the user with an indication of when the antimicrobial agent within the wiper 10 is substantially depleted and the used wiper should be replaced.
  • the cleaning articles of the present invention include a fibrous layer or material.
  • the fibrous material comprises at least a portion of the cleaning substrate and has a porous structure including individual openings or interstitial spaces which, in certain embodiments, collectively form pathways through the thickness of the material via adjacent, inter-connecting spaces or openings.
  • the wiping substrate substantially retains its integrity when wet and, in certain aspects, remains resiliently compressible when wet.
  • the fibrous sheets may comprise continuous fibers, staple length fibers, or combinations of the same.
  • the fibrous sheets may comprise either woven, knit, or nonwoven fabrics and further the fibrous material or sheets may be used to form laminates with one or more additional materials.
  • Suitable fibrous sheets will typically have a dry basis weight of from about 20 g/m 2 to about 260 g/m 2 .
  • the dry basis weight of the fibrous sheet will be about 30 g/m 2 to about 190 g/m 2 and in still further embodiments may be between about 35 g/m 2 to about 120 g/m 2 .
  • the fibrous material includes cellulosic fibers.
  • the fibrous material includes greater than about 15% by weight cellulosic fibers and in certain embodiments at least about 30% cellulosic fibers and in still further embodiments at least about 50% cellulosic fibers.
  • the fibrous material may comprise between about 15% and 98% cellulosic fibers, or between about 30% and 95% cellulosic fibers or even between about 55% and 90% cellulosic fibers.
  • the cellulosic fibers may include traditional paper making fibers including woody fibers such as those obtained from deciduous and coniferous trees, including, but not limited to, softwood fibers, such as northern and southern softwood kraft fibers, and also hardwood fibers, such as eucalyptus, maple, birch, and aspen.
  • woody fibers such as those obtained from deciduous and coniferous trees
  • softwood fibers such as northern and southern softwood kraft fibers
  • hardwood fibers such as eucalyptus, maple, birch, and aspen.
  • Other papermaking fibers that can be used in the present disclosure include paper broke or recycled fibers and high yield fibers.
  • Various pulping processes believed suitable for the production of cellulosic fibers include bleached chemithermomechanical pulp (BCTMP),
  • the cellulosic fibers may comprise synthetic fibers derived from cellulosic materials such as, for example, viscose, Rayon, lyocell or other comparable fibers.
  • secondary fibers obtained from recycled materials may be used, such as fiber pulp reclaimed from sources such as, for example, newsprint, paperboard, office waste, etc.
  • the fibrous sheet material can comprise a single variety of cellulosic fibers or alternatively can comprise mixture of two or more different cellulosic fibers. As is known in the art, it is often desirable to employ mixtures of fibers especially when utilizing recycled or secondary fibers.
  • the fibrous material may also comprise non-cellulosic fibers such as synthetic polymer fibers including those formed form polyolefin, polyester, polyamide, polylactic acid, or other fiber forming polymers.
  • Preferred polymeric fibers include, but are not limited to, those comprising polyproplyene and/or polyethylene.
  • the non-cellulosic fibers may be formed according to one or more various processes including, but not limited to, those formed by melt-extrusion processes such as, for example, spunbonding, meltblowing, and so forth.
  • Hydroentangling is a process of forming a nonwoven web which generally includes the steps of (i) depositing lose fibers on a porous belt or patterned screen and (ii) subjecting the fibers to one or more rows of fine high-pressure jets of water so that the fibers become sufficiently entangled with one another to form a coherent nonwoven web.
  • hydroentangling readily allows for the combination of different fiber types, such as combining fibers of distinct composition (e.g. polymeric fibers and wood pulp fibers) or fibers of distinct size (e.g. continuous length and staple length fibers).
  • the fibrous sheet can comprise a mixture of pulp fibers and continuous polyolefin spunbond fibers.
  • the fibrous sheet of the present invention can comprise an air-laid nonwoven web.
  • fibers are entrained in an air stream, intermingled and then deposited onto a forming screen or wire, usually with the assistance of a vacuum supply.
  • the randomly deposited fibers are then bonded to one another autogenously, such as through the use of heat and/or pressure, or through the use of a binder, such as by the inclusion of binder fibers or the application of adhesive to the web.
  • Coformed materials are also particularly well suited for use in the present invention.
  • Coform nonwoven webs are formed by the comingling of polymeric fibers and absorbent fibers, such as polyolefin fibers and cellulosic fibers, as the fibers are entrained by a common airstream before they are deposited onto a forming surface. Examples of such coform sheets materials, and methods of making the same, are described US4100324 to Anderson et al., US5350624 to Georger et al., and US201 1/0151 196 to Schmidt et al. In certain embodiments such coform sheets can comprise air- formed matrix of thermoplastic polyolefin meltblown fibers and wood pulp fibers.
  • the nonwoven web may also be further treated by one or more techniques as is known in the art to improve the durability, strength, hand, aesthetics, texture, and/or other properties of the fibrous sheet material.
  • the nonwoven web may be pattern bonded or embossed by the use of heat, pressure and/or ultrasonic energy.
  • various suitable pattern embossing and/or bonding techniques are described in US3855046 to Hansen et al., US5620779 to Levy et al., US5962112 to Haynes et al., US7252870 to Anderson et al. and so forth.
  • the fibrous sheet materials may be embossed and/or bonded by continuous and/or discontinuous lines, by patterns of numerous discrete elements, or other patterns as may be desired.
  • the nonwoven web may be embossed and/or bonded uniformly across the surface or regionally such as along the periphery or edge of the sheet.
  • the fibrous sheets may also, if desired, be treated by various other known techniques such as, for example, stretching, needling, creping, and so forth.
  • the fibrous sheet includes one or more antimicrobial agents that are releasably bound to the cellulosic fiber through ionic bonding.
  • the antimicrobial agent(s) is an ionic antimicrobial agent and, in certain embodiments, can comprise a cationic antimicrobial agent.
  • Ionic antimicrobial agents believed suitable for use in the present invention include those in the following families: quaternary ammonium compounds, bis(biguanide)s, chitosans, and the like.
  • the cationic antimicrobial agent can be highly ionic (N+, X- ) with less than about 10% covalent content.
  • An antimicrobial agent well suited for use in the present invention includes one or more a quaternary ammonium compound having the following formula: wherein,
  • R1 , R2, R3, and R4 are independently selected from the group consisting of H, C1-C30 alkyl, C1-C30 alkenyl, C1-C30 alkylethoxy, C1-C30 alkylphenolethoxy, and the like; and A is selected from the group consisting of halogens (e.g., chlorine, bromine, fluorine, etc.), methosulfates, phosphates, and the like.
  • halogens e.g., chlorine, bromine, fluorine, etc.
  • methosulfates phosphates, and the like.
  • suitable quaternary ammonium compounds that may be used in present invention include, but are not limited to, benzalkonium chloride (BZK) or other benzalkonium halides, benzethonium chloride or other benzethonium halides, cetylpyridinium chloride, dequalinium chloride, N-myristyl-N-methyl-morpholinium methyl sulfate, poly-N-3-(dimethylammonio)propyl-N-3- (ethyleneoxyethelene dimethylammonio)propylurea dichloride, alpha-4-1 -tris(2- hydroxyethyl)ammonium chloride-2-butenyl-omega-tris(2-hydroxyethyl)ammonium chloride, polyoxyethylene (dimethyliminio)ethylene(dimethyliminio)-ethylene dichloride.
  • BZK benzalkonium chloride
  • Additional quaternary ammonium compounds believed suitable for use in the present invention include those described in US6712121 to Clark et al. and US7838447 to Clark et al., the contents of which are incorporated herein to the extent consistent herewith.
  • Various quaternary ammonium antimicrobial agents are commercially available from Lonza Group Ltd including BARDAC 208M (a blend of alkyl dimethyl benzyl ammonium chlorides), BARDAC 2080 (based on dialkyl(C 8-C 10)dimethyl ammonium chloride); BARDAC 2250 (didecyl dimethyl ammonium chloride); BARQUAT MB-50 and BARQUAT MB-80 (blends of alkyl dimethyl benzyl ammonium chlorides); and BARQUAT MS-100 (based on myristyl dimethyl benzyl ammonium chloride), and others.
  • An additional antimicrobial agent believed suitable for use with the present invention includes one or more agents from the bis(biguanide) family.
  • Biguanide antimicrobial actives including, but not limited to, polyhexamethylene biguanide hydrochloride,
  • Additional biguanide antimicrobial actives believed suitable for use in the present invention include those disclosed in US4655756 to Fawkes, US4615937 to Bouchette, US5141803 to Pregozen, and US5993840 to Fawkes et al..
  • chitosan is a partially or fully deacetylated form of chitin, a naturally occurring polysaccharide. Chitin occurs widely in nature, for example, in the cell walls of fungi such as mushrooms and the hard shell of insect and crustaceans such as shrimp.
  • chitosan compounds include, but are not limited to, the following: 417963 Chitosan from shrimp shells, practical grade; 448877 Chitosan medium molecular weight; 746134 Chitosan from white mushrooms, all from Sigma-Aldrich Chemical Company, Milwaukee, Wisconsin.
  • examples of chitosan derivatives suitable for use in the present invention includes chitosan glycolate and qauternized chitosan compounds.
  • the amount of the antimicrobial agent applied to the cellulosic fiber and contained within the cleaning article can vary in accordance with various factors including, the intended function of the antimicrobial agent, the intended end-use of the article, the desired longevity of the article, the relative amounts of the other components present within the formulation, the weight percent of cellulosic fiber in the sheet, etc.
  • a significant factor in determining suitable add-on levels for the antimicrobial agent is whether the antimicrobial agent is intended to sanitize hard surfaces wiped by the fibrous sheet or whether the antimicrobial is merely intended to limit or prevent the growth of microbes within the sheet itself.
  • the amount of antimicrobial agent applied to the cellulosic fibers can be between about 0.01 % and about 10% by weight (based upon the weight of the dried treated cellulosic fibers).
  • the antimicrobial agent is present in the sheet in amounts between about 0.1 % and about 8% by weight, or between about 0.5% and about 4% by weight (based upon weight of the dry wipe).
  • the antimicrobial agent is present in amounts between about 0.01 % and about 0.1 % by weight (based upon the weight of the dry wipe).
  • the antimicrobial agent is desirably present on between about 55% and 100% of the area of the fibrous sheet.
  • a first outer surface of the sheet can have the antimicrobial agent applied thereto and/or present on at least 55%, 70% or 90% of the surface area of said first surface or of the entire sheet surface area.
  • the antimicrobial treatment can be present upon 100% of the surface area of the first surface and/or all surfaces of the fibrous web. Further, as applied, the antimicrobial agent may also be present through the entire thickness of the sheet.
  • the antimicrobial agent can become releasably attached to the cellulosic fibrous material.
  • partially charged groups present on cellulosic fibers e.g., hydroxy moieties
  • the antimicrobial agent can become releasably attached to the cellulosic fibrous material.
  • partially charged groups present on cellulosic fibers e.g., hydroxy moieties
  • the antimicrobial agent when subjected to continuous agitation, such as occurs in a typical pulping operation, a greater likelihood exists that the antimicrobial agent will be brought into contact with any free partially charged groups on the cellulosic fibers.
  • substantially all of the antimicrobial agent present within the pulper can become associatively bonded to the fibrous material.
  • any liquid that is later removed during the papermaking process can be substantially free of the antimicrobial agent.
  • the antimicrobial agent is mixed with the fibrous material within the pulper, the resulting fibrous slurry can optionally be diluted and readied for formation into a layer of fibrous material or cellulosic web utilizing conventional wet-laying or papermaking techniques.
  • the cellulosic fibers may be treated with the various agents by means known in the art such as, for example, spraying, printing, etc.
  • the antimicrobial agents may be applied across the surface of the sheet in one or more patterns as desired such as through the use of rotogravure or gravure printing (direct or indirect), flexographic printing, screen printing, digital, spray, stencil application and so forth.
  • Indicator rotogravure or gravure printing (direct or indirect), flexographic printing, screen printing, digital, spray, stencil application and so forth.
  • Dyes suitable for use with the present invention are capable for preferentially forming a complex with the antimicrobial agent relative to the cellulosic material and further are highly resistant to oxidation and reduction.
  • the dye will be color stable resistant to oxidation and reduction and have an ORP of between 0 and 1.61 V.
  • the dye may have an ORP of between 0.5 and 1.6 V.
  • ORP values of agents are determined under standard conditions (e.g. 1 molar concentration, 25°C, 1 ATM).
  • Dyes suitable for use in the present invention include
  • metallophthalocyanines The phthalocyanine ring, as shown below, is an intensely blue-green-colored aromatic macrocyclic compound, however other colors can be achieved by the formation of coordination complexes with one or more elements, particularly metals.
  • metallophthalocyanines such as copper (II) phthalocyanine tetrasulfonic acid tetra sodium salt (Acid Blue 249, shown below), is intensity colored and chemical resistant.
  • Ultramarines comprise complex aluminum sulfosilicate lattices having a general formula of Na(AISiO)S, the proportions varying with color.
  • Ultramarine blue for example, has the following approximate formula: Na7Al6Si602 S3
  • Ultramarine blue can, in one aspect, be obtained by calcining a mixture of kaolin, sulfur, sodium carbonate, and carbon at temperatures above 700°C.
  • Various ultramarines include CAS nos. 1317- 97-1 ; 1345-00-2; 1 11 16-33-55; 12703-66-1 ; 12769-96-9; 57455-37-5 and so forth. These are available as violet, pink, green and orange colors.
  • Iron oxides include, for example, FeO; FeOOH; Fe 2 03; Fe30 4 and mixtures thereof.
  • Various iron oxides include CAS Nos. 1345-25-1 ; 1309-37-1 ; 1309-38-2; 1332-37-2; 12227-89-3; 20344-49-4; 51274-00-1 ; 64294-91 -3 and so forth.
  • the hydrated forms of iron oxides are also believed suitable for use herein.
  • the indicator agent is desirably applied to less than the entire cleaning sheet.
  • a first planar surface of the sheet can have the indicator agent applied thereto covering less than about 50% of the surface area of the entire fibrous sheet or less than about 50% of the surface area of the first surface of the sheet.
  • the indicator agent may be applied to and present on between about 1 % and about 45% of the surface area of the first surface, or between about 2% and 30% of the surface area of the first surface of the sheet or even between about 5% and about 20% of the surface area of the first surface of the sheet.
  • the indicator agent may be applied in such a manner to both the opposed first and second surfaces of the web and, in certain embodiments, also through the entire depth of the sheet.
  • the graphics When applied to both the first and second planar surfaces of the cleaning article, the graphics may be the same of different from one another.
  • the indicator agent can be applied as a single contiguous graphic or, alternatively, as a plurality of discrete graphics.
  • the indicator can be applied in any one of various graphics including, but not limited to, a pattern of contiguous or discrete lines, circles, dots, icons, images, characters, etc.
  • more than one indicator dye may be used to provide a graphic with a plurality of visually distinguishable colors.
  • indicator agent may be applied by depositing the same upon a preformed sheet or fabric containing the cellulosic material with the antimicrobial agent bonded thereto.
  • the indicator may be applied to present the desired graphic or visual by the use of rotogravure or gravure printing (direct or indirect), flexographic printing, screen printing, stencil application and so forth.
  • the method also includes a drying step.
  • the indicator agents as applied to the cellulosic fibers, together with the associated solvents, may be dried using one or more means known in the art such as, for example, heating by conveying the treated sheet material over heated cans or roller (e.g. a Yankee dryer), passing hot dry air through the treated sheet material (e.g. through air dryer), and other forms of heating (e.g. use of infrared heaters, UV lights, etc.).
  • the base sheet and fibers therein may optionally contain and/or be treated with one or more components to improve or modify certain attributes or functions of the cleaning sheet.
  • the base sheet may further contain one or more surfactants or detergents.
  • surfactants or detergents Such compounds are known to improve the wettability of fabrics, aid various aqueous cleaning actions and in certain instances can also aid in the effectiveness of the antimicrobial agent.
  • the fibrous sheet and/or fibers may optionally contain and/or be treated with other additives including, but not limited to sequestrants, solvents, pH modifiers, wet strength resins, binders, antistatic agents, fragrances, and so forth.
  • additives believed suitable for use in combination with the present invention are described in US7838447 to Clark et al ., the entire contents of which are incorporated herein to the extent consistent herewith.
  • Example 1 X-80 HYDROKNIT® wipes (Kimberly-Clark Professional, Roswell, Georgia) comprising wood pulp fibers and polypropylene spunbond fibers, were cut into 6 inch x 6 inch squares.
  • the wiper sheets were treated with a 0.5% wt/wt solution of water and Chitosan (Sigma-Aldrich Chemical Company, Milwaukee, Wisconsin).
  • the chitosan solution was applied to the wiper sheets drop-wise in discrete locations via a Pasteur pipette.
  • the wiper sheets were then dried in an oven at 85°C for 5 minutes.
  • the dried wiper sheets were then dipped into a solution of 5% wt/wt copper phthalocyanine tetrasulphonic acid, tetra sodium salt (Sigma-Aldrich Chemical Company, Milwaukee, Wisconsin) in water and placed onto a paper towel.
  • the treated wiper sheets were blue in color although they were darker blue in the areas treated with the chitosan solution.
  • the wiper sheets were then rinsed in room temperature water; the rinsed wiper sheets retained the blue color only in the areas treated with the chitosan solution evidencing that the coloring agent preferentially binds with the applied chitosan and not the wood pulp or polyolefin fibers.
  • the rinsed wiper sheets were dried and then placed for 5 hours into a container of undiluted household bleach (Clorox Concentrated Regular-Bleach, from Clorox Company of Oakland, CA). No discharge of the blue color or leaching of the blue color was observed evidencing the stability of both the coloring agent and chitosan-coloring agent complex.
  • Example 2 X-80 HYDROKNIT® wipes were also obtained for use in this example. Wiper sheets were set aside untreated ("control samples") and other wiper sheets were treated with an aqueous solution of CARBOQUAT® H (from Lonza of Allendale, New Jersy) to provide a wiper sheet having 0.5% by weight quaternary ammonium antimicrobial agent therein ("treated samples”). A O.1 % wt/wt water solution of ultramarine blue (from Hilton Davis, Cincinnati Ohio) was made and applied to both control samples and treated samples. The samples were then dried in a convection oven at 85°C for 10 minutes. The dried samples were then subjected to 3 minutes of hand washing in a cleaning solution followed by drying in a convection oven.
  • control samples untreated
  • CARBOQUAT® H from Lonza of Allendale, New Jersy
  • a O.1 % wt/wt water solution of ultramarine blue from Hilton Davis, Cincinnati Ohio
  • Example 2 The control and treated samples described in Example 2 were again made and used in this example. A O.1 % wt/wt solution of water and iron oxide (BF Goodrich, Cincinnati, Ohio) was made and applied to both the treated and control samples. These wipes were dried in a convection oven at 85°C for 10 minutes. The cleaning solution described in Example 2 was again prepared and used to subject the samples to 3 minutes of hand washing followed by drying in a convection oven. On visual inspection the control samples had lost all of the black color whereas the treated samples retained the black color of the iron oxide. The treated samples were subjected to multiple 3-minute hand wash cycles with drying after each washing. Upon visual inspection after each washing cycle, it could be seen that the black color slowly faded evidencing that the antimicrobial/dye complex was slowly washed out from the treated samples.
  • a O.1 % wt/wt solution of water and iron oxide BF Goodrich, Cincinnati, Ohio
  • Example 4 (Comparative) X-80 HYDROKNIT® wipers were also obtained for use in this example. Wiper sheets were treated with 0.5% wt/wt solution of water and Mackamine CO-SP (Lauramine oxide from Rhodia Group, St Louis, Missouri). The antimicrobial agent was applied to the wiper sheets drop-wise in discrete locations via a Pasteur pipette. The treated wiper sheets were then dried in the oven at 85° C for 10 minutes. The dry wipes were then dipped into a 0.1 % wt/wt solution of water and copper phthalocyaninetetrasulfonic acid tetrasodium salt (Sigma-Aldrich Chemical Company, Milwaukee, Wisconsin). The treated wiper sheets were then rinsed with water.
  • the cleaning articles can, optionally, include one or more additional elements or components as are known in the art.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microbiology (AREA)
  • Inorganic Chemistry (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)

Abstract

L'invention concerne des lingettes de nettoyage jetables ayant un indicateur d'utilisation, aptes à être utilisées dans des applications de nettoyage industrielles et domestiques. Les lingettes de nettoyage comprennent des fibres de cellulose, un agent antimicrobien et un complexe indicateur, le complexe indicateur comprenant (i) un composé coloré sélectionné dans le groupe constitué d'un composé de phtalocyanine, d'un composé ultramarin et d'un composé d'oxyde de fer et (ii) un agent cationique. Le complexe indicateur est fixé de manière détachable, par liaison ionique, à une région discrète de la feuille fibreuse. Le composé antimicrobien est également fixé, par liaison ionique, à la feuille fibreuse. Ainsi, en utilisation, le complexe indicateur est détaché par la feuille fibreuse de manière proportionnelle à la libération de l'agent antimicrobien. La libération et la perte du complexe indicateur fournit à l'utilisateur une indication du moment où l'agent antimicrobien dans la feuille fibreuse est sensiblement épuisé et où la lingette de nettoyage doit être remplacée.
PCT/US2016/034189 2015-05-26 2016-05-25 Dispositif d'essuyage avec indicateur d'utilisation Ceased WO2016191500A1 (fr)

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US15/575,449 US20180184876A1 (en) 2015-05-26 2016-05-25 Wiper with use indicator

Applications Claiming Priority (2)

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US201562166574P 2015-05-26 2015-05-26
US62/166,574 2015-05-26

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0047101A2 (fr) * 1980-09-02 1982-03-10 Vedale Limited Système indicateur pour la vie utile de produits libérant des agents actifs dans l'atmosphère
US4678704A (en) * 1985-07-24 1987-07-07 Fibre Treatments (Holding) Limited Impregnated substrate incorporating an indicator dye
US20050125926A1 (en) * 2003-07-24 2005-06-16 Rekum Mireille V. Cleaning article with indicator
US20050160543A1 (en) * 2004-01-26 2005-07-28 The Procter & Gamble Company Cleaning wipe with active graphic
US7008600B2 (en) * 2003-08-01 2006-03-07 The Clorox Company Disinfecting article and cleaning composition with extended stability

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0047101A2 (fr) * 1980-09-02 1982-03-10 Vedale Limited Système indicateur pour la vie utile de produits libérant des agents actifs dans l'atmosphère
US4678704A (en) * 1985-07-24 1987-07-07 Fibre Treatments (Holding) Limited Impregnated substrate incorporating an indicator dye
US20050125926A1 (en) * 2003-07-24 2005-06-16 Rekum Mireille V. Cleaning article with indicator
US7008600B2 (en) * 2003-08-01 2006-03-07 The Clorox Company Disinfecting article and cleaning composition with extended stability
US20050160543A1 (en) * 2004-01-26 2005-07-28 The Procter & Gamble Company Cleaning wipe with active graphic

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