Classifications

• • D—TEXTILES; PAPER
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  • 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
  • D06P1/64—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 using compositions containing low-molecular-weight organic compounds without sulfate or sulfonate groups
  • D06P1/642—Compounds containing nitrogen
  • D06P1/649—Compounds containing carbonamide, thiocarbonamide or guanyl groups
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
  • A01N25/34—Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
  • A01N37/18—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof
  • A01N37/22—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof the nitrogen atom being directly attached to an aromatic ring system, e.g. anilides
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N53/00—Biocides, pest repellants or attractants, or plant growth regulators containing cyclopropane carboxylic acids or derivatives thereof
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  • 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
  • D06M13/10—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 oxygen
  • D06M13/12—Aldehydes; Ketones
  • D06M13/13—Unsaturated aldehydes, e.g. acrolein; Unsaturated ketones; Ketenes ; Diketenes
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  • 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
  • D06M13/10—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 oxygen
  • D06M13/152—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 oxygen having a hydroxy group bound to a carbon atom of a six-membered aromatic ring
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  • 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
  • D06M13/10—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 oxygen
  • D06M13/165—Ethers
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  • 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
  • D06M13/10—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 oxygen
  • D06M13/165—Ethers
  • D06M13/175—Unsaturated ethers, e.g. vinylethers
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  • 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
  • D06M13/10—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 oxygen
  • D06M13/224—Esters of carboxylic acids; Esters of carbonic acid
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  • D06M13/10—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 oxygen
  • D06M13/224—Esters of carboxylic acids; Esters of carbonic acid
  • D06M13/236—Esters of carboxylic acids; Esters of carbonic acid containing halogen atoms
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  • 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
  • D06M13/41—Amides derived from unsaturated carboxylic acids, e.g. acrylamide
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  • 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
  • D06M13/415—Amides of aromatic carboxylic acids; Acylated aromatic amines
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  • 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
  • D06M13/418—Cyclic amides, e.g. lactams; Amides of oxalic acid
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  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
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  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/39—Aldehyde resins; Ketone resins; Polyacetals
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  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
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  • D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
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  • 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
  • D06P1/64—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 using compositions containing low-molecular-weight organic compounds without sulfate or sulfonate groups
  • D06P1/651—Compounds without nitrogen
  • D06P1/65106—Oxygen-containing compounds
  • D06P1/65112—Compounds containing aldehyde or ketone groups
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  • 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
  • D06P1/64—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 using compositions containing low-molecular-weight organic compounds without sulfate or sulfonate groups
  • D06P1/651—Compounds without nitrogen
  • D06P1/65106—Oxygen-containing compounds
  • D06P1/65131—Compounds containing ether or acetal groups
• • 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
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
  • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
  • Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

Definitions

• insects Many occupations (including, but not limited to, industrial (e.g., utility workers, petrochemical workers, etc.), military, rescue, firefighting, construction, and landscaping) require that time be spent in outdoor environments. In many instances, these environments are populated by a variety of insects. Many of these insects, such as mosquitoes and ticks, can bite, sting, or otherwise make undesirable contact with people. Although some insects are merely a nuisance, other insects can carry diseases, viruses, or other maladies that may be transmitted through biting or other contact with the person. For example, mosquitoes have been known to carry the West Nile virus, malaria, yellow fever, dengue fever, encephalitis, and other maladies. In addition, ticks can carry Lyme disease. Other insects can carry other serious diseases or maladies, and have been known to bite humans or otherwise transmit such diseases through biting or other types of contact.
• Insect bites can sometimes be avoided by staying indoors or avoiding certain geographical areas. These alternatives may not always be available, however, when the person is required by their job duties to spend extended periods of time outdoors. In these cases, a person can reduce the possibility or frequency of insect bites by applying a topical insect repellent to his or her skin. Although topical insect repellents can reduce the likelihood or frequency of insect bites, insects may still bite the person through a garment, such as a shirt or relatively thin jacket, that is being worn on the person's body.
• One embodiment comprises fabrics treated with at least one insect repellant, wherein the insect repellant is absorbed, imbibed, or otherwise taken into and locked in the fibers. Over time, the insect repellent molecules are slowly released to the surface of the fibers where they act as a repellent to insects. While these fabrics repel insects, they can be laundered without losing their insect repellant properties.
• the fabrics treated with at least one insect repellant further comprise at least some fibers having flame resistant properties. These fabrics repel insects while maintaining their flame resistant properties and can be laundered without losing their insect repellant or flame resistant properties.
• Another embodiment of the invention comprises a method for imparting insect repellant properties to fabrics such that the fabrics maintain their insect repellant properties after laundering.
• a garment can comprise a shirt that can be worn by a user in environments where the user may encounter one or more disease-bearing insects.
• the shirt is made of material that, as described below, is treated with at least one insect repellent.
• Such garments may include, but are not limited to, one or more of jackets, pants, coveralls, vests, and the like that are intended for use in various applications.
• the present disclosure is not limited to garments. More generally, the present disclosure pertains to any fabric where insect repellency is desirable. For example, insect repellency is desirable in fabrics used in curtains that hang over windows or doors, canopies that drape over beds or other sleeping accommodations, or fabrics used to make tents or other flexible shelters.
• the garment can be constructed from a fabric having flame resistant properties.
• Such fabric may comprise inherently flame resistant fibers, fibers that are not inherently flame resistant but that, as fibers or yarns, have been treated with flame retardant chemicals, or both types of fibers.
• inherently flame resistant fibers refers to fibers that do not burn because the chemical structure of the fiber is extremely stable. Examples of inherently flame resistant fibers include, but are not limited to, aramid (aromatic polyamide), polybenzoxazole (PBO), polybenzimidazole (PBI), melamine, polyamide, polyimide, polyimideamide, and modacrylic fibers.
• non-inherently flame resistant fibers that may be treated with flame retardant chemicals include, but are not limited to, cellulosic fibers such as rayon, acetate, triacetate, and lyocell. It is to be understood that these constructions are mere examples and are not intended to limit the scope of the present disclosure.
• the insect repellent be absorbed, imbibed or otherwise taken in by at least some of the fibers (rather than merely applied to the surface of the fibers), hi this way, the insect repellency properties of the fabric are better retained after repeated launderings.
• Insect repellency may be imparted to the fabric (which is preferably, but not necessarily, also flame resistant) in a variety of ways, hi one embodiment, the insect repellent is added to the fabric during a dyeing process or during a finishing process, hi one embodiment, the fabric can be treated with insect repellant in a dye-bath wherein several ingredients are mixed together in liquid form, and the fabric is immersed in the dye-bath.
• ingredients in the dye-bath could include any or all of: dye to color the fabric, a dye assistant (or "carrier"), an insect repellant, or a flame retardant additive (if applicable).
• Carriers aid in the absorption of dye into the fibers of the fabric, hi some cases, the carrier may act as a natural insect repellant, as discussed below.
• Example carriers include dibutylacetamide, dibutylformamide, aryl ether, isophorone, benzyl alcohol, N-cyclohexyl pyrrolidinone (CHP), and N-diethyl-m-toluamide (“DEET”).
• Example insect repellents include, but are not limited to, permethrin (such as Evercide 2778 available from McLaughlin Gormley King Co. or Permanone 40 available from Bayer Environmental Science) and DEET (available from Fisher Scientific and from Morflex, Inc.).
• the fabric is contacted with the dye-bath, typically by immersion, and the dye-bath is heated to fix the dye in the fibers.
• the insect repellent which can be in the form of the carrier or a separate chemical, is absorbed, imbibed or otherwise taken in by at least some of the fibers. Over time, the insect repellent molecules are slowly released to the surface of the fibers where they act as a repellent to insects. It will be obvious to one of ordinary skill in the art that dyeing need not occur during this process. Rather, the process may be carried out without a dye if it is desired to impart insect repellent properties to already-dyed or un-dyed fabrics.
• the fabric has been described as being treated with an insect repellant, a flame retardant, or a combination thereof when the fabric is wholly constructed, the treatment can be performed during earlier stages of the process such as on the fibers, yarn, or other fibrous textile before it is woven or spun into wholly constructed fabric. Additionally, a carrier can be imbibed into the fibers during fiber production prior to treating the fibers or the fabric constructed therefrom. This method may be advantageous in that additional carrier may not be needed in the bath.
• Equipment for dyeing textiles includes jig dyeing machines, pad dyeing machines, beck dyeing machines, and jet dyeing machines.
• One type of insect repellant is permethrin, which can be added to the dye-bath in a concentration that ranges from about 0.15% on weight of fabric ("owf) to about 2.80% owf.
• a carrier may be, but need not always be, used to solubilize the permethrin such that the permethrin may be absorbed into the fibers of the fabric more readily.
• the bath may be conducted at temperatures ranging from about IQO 0 F to about 300°F. When the bath is conducted below the boiling point, which is 212°F at atmospheric pressure, CHP or benzyl alcohol may be particularly effective in achieving insect repellant absorption. After the fabric has been treated in the bath, it is removed and heated to dry the fabric.
• Amounts of insect repellant on the fabric were determined using gas chromatography, such as the GLC Method of Analysis for Permethrin in Technical Material and Formulations available from the McLaughlin Gormley King Company.
• one possible test method for determining the amount of permethrin incorporated into the fabric uses a gas chromatograph equipped with a flame ionization detector.
• the column is 5% OV-I on Chromosorb W(HP) 80/100 mesh, 120 cm x 4 mm i.d., glass.
• the column temperature is 250 0 C, and the injection port and detector temperatures are each 300 0 C.
• Gas flows are N 2 at 50 mls/min, air at 240 mls/min, and H 2 at 60 mls/min.
• the flame ionization detector has a sensitivity of 5 x 10 "n AFS.
• the method is as follows: A sample of permethrin in acetone is prepared such that the amount of permethrin in the acetone is approximately 1.0 mg/ml. A standard solution comprising 1.0 mg/ml of permethrin in acetone is also prepared. The sample and standard solution each further comprise one equivalent of diethylhexyl phthalate as an internal standard. The sample and standard solutions are injected onto the column. Retention time is about 5 minutes for permethrin and about 3 minutes for diethylhexyl phthalate. This method does not separate the isomers of permethrin.
• the insect repellant such as permethrin
• the finishing process can occur alternatively or in addition to treating the fabric with an insect repellant in a dye-bath.
• One such finish formulation can contain 0.9%-6.0% on weight of bath (“owb"), 40% active permethrin.
• the finish can be applied by a finish applicator such as a Pad Roll, Kiss Roll, Knife-over roll, or foam finish applicator.
• the treated fabric can be dried in a drying oven (or tenter) at around 25O 0 F - 400°F for a time sufficient to dry the fabric. When the fabric dries, the fibers contract and lock the insect repellant in the fiber.
• binders such as melamine formaldehyde resins, dimethyloldihydroxyethyleneurea (DMDHEU) resins, acrylic polymers, polyurethane polymers, etc. may be added to the finishing formula to assist in maintaining laundering durability.
• DMDHEU dimethyloldihydroxyethyleneurea
• DEET N-diethyl-m- toluamide
• DEET N-diethyl-m- toluamide
• DEET can also serve as a carrier during the dyeing process.
• carriers are removed as much as possible from the dyed fabric because of the flammability of the carriers.
• DEET is used as an insect repellant and is incorporated in the fabric using the dye-bath method
• relatively large amounts of DEET can be used so that a relatively high residual amount of DEET remains in the fibers after the bath is completed.
• the DEET may be added to the dye-bath in a concentration that ranges from about 10 grams per liter (gpL) to about 60 gpL.
• DEET can be incorporated into the fibers during a finishing process in a manner similar to that described above in relation to permethrin. Li such a case, the finishing formula can include DEET in a concentration of about 0.9%-6.0% owb.
• a flame retardant compound can also be included in the dye-bath, applied as a finishing treatment, or otherwise incorporated into the fibers of the fabric to enhance flame resistance or to counteract any deleterious effects of the carrier contained within the fibers.
• other chemicals can be applied to the fibers (e.g., added to the mixture) including lubricants, wetting agents, leveling agents, and the like. Incorporating flame retardant compound in the fiber matrix may also enhance durability of the fibers and resulting products.
• Embodiments of this invention were tested by Insect Control & Research of Baltimore, Maryland in order to determine the insect repellent properties of the fabric.
• the test method used fabric samples treated with both permethrin and DEET, and further tested the samples both before and after laundering.
• the fabric was wrapped around a tube constructed of a screen of the type typically used as a window screen.
• Fabric that was not treated with any insect repellant was wrapped around another tube to serve as the control tube. Volunteers then placed their arms in the tubes, and placed their arms into cages containing 250 mosquitoes. The number of mosquitoes on the fabric was counted after three minutes. Thereafter, the number of mosquitoes was counted at thirty-minute intervals until the fabric no longer repelled mosquitoes.
• Table Di shows the test results for a 4.5 ounce per square yard (osy), 65/35 blend of Nomex T-462 ® and FR rayon (Fabric A) treated with 1.6% owf of permethrin.
• the fabric was tested both before and after laundering.
• markedly improved results were achieved with the unlaundered, treated fabric as compared to the unlaundered, untreated fabric, with an average repellency increase of about 75% over an eight-hour time period.
• improved results occurred for the laundered, treated fabric as compared to the laundered, untreated fabric, with an average repellency increase of about 38% over a period of approximately two hours.

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