EP4190968B1 - Verwendung eines trocknerblatts zur verminderung der luftfreisetzung von fasern aus einem trockner - Google Patents

Verwendung eines trocknerblatts zur verminderung der luftfreisetzung von fasern aus einem trockner Download PDF

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Publication number
EP4190968B1
EP4190968B1 EP21212492.9A EP21212492A EP4190968B1 EP 4190968 B1 EP4190968 B1 EP 4190968B1 EP 21212492 A EP21212492 A EP 21212492A EP 4190968 B1 EP4190968 B1 EP 4190968B1
Authority
EP
European Patent Office
Prior art keywords
dryer
fabric
dryer sheet
fibers
fiber
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.)
Active
Application number
EP21212492.9A
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English (en)
French (fr)
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EP4190968A1 (de
Inventor
Neil Joseph Lant
Margaux Marie Anna DEFAYE
Andrew John Smith
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.)
Procter and Gamble Co
Original Assignee
Procter and Gamble Co
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Publication date
Application filed by Procter and Gamble Co filed Critical Procter and Gamble Co
Priority to EP21212492.9A priority Critical patent/EP4190968B1/de
Publication of EP4190968A1 publication Critical patent/EP4190968A1/de
Application granted granted Critical
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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
    • D06M13/46—Compounds containing quaternary nitrogen atoms
    • D06M13/463—Compounds containing quaternary nitrogen atoms derived from monoamines
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/38—Cationic compounds
    • C11D1/62—Quaternary ammonium compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/04—Detergent materials or soaps characterised by their shape or physical properties combined with or containing other objects
    • C11D17/041—Compositions releasably affixed on a substrate or incorporated into a dispensing means
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/04—Detergent materials or soaps characterised by their shape or physical properties combined with or containing other objects
    • C11D17/041—Compositions releasably affixed on a substrate or incorporated into a dispensing means
    • C11D17/047—Arrangements specially adapted for dry cleaning or laundry dryer related applications
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/0005—Other compounding ingredients characterised by their effect
    • C11D3/001—Softening compositions
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2075—Carboxylic acids-salts thereof
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/50—Perfumes
    • 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
    • D06M13/10—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
    • D06M13/184—Carboxylic acids; Anhydrides, halides or salts 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
    • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
    • D06M23/02—Processes in which the treating agent is releasably affixed or incorporated into a dispensing means

Definitions

  • the present invention is in the field of fabric treatments.
  • the invention relates to the use of a dryer sheet to reduce airborne fibers release during the treatment of fabrics.
  • Vented tumble dryers release moist warm air from the fabric drying process to the external environment, usually through pipework linking the appliance to a vent in an exterior wall. Although such dryers have an integrated lint filter intended to remove fibers from this air stream, recent reports suggest that this process is incomplete, leading to microfibers being released in the ducted warm air and subsequently polluting the external environment.
  • Patent literature US 5470492 A provides examples of dryer-activated fabric softening articles comprising polyester substrates for use in an automatic clothes dryer.
  • the objective of the present invention is to reduce the release of airborne microfibers during the treatment of fabrics in a vented tumble dryer.
  • the present invention provides the use of a dryer sheet to reduce airborne fibers release during the treatment, preferably drying, of fabrics in a vented tumble dryer.
  • the dryer sheet comprises a non-woven substrate and more preferably the non-woven substrate comprises polyester.
  • the dyer sheet comprises a fabric treatment composition, more preferably a softening composition.
  • the use of a dryer sheet comprising a softening composition, preferably a softening composition comprising a quaternary ammonium softening compound provides improved reduction of the release of fibers during fabric treatment in a vented tumble dryer.
  • the present invention encompasses the use of a dryer sheet to reduce airborne fibers release during the treatment, preferably drying, of fabrics in a vented tumble dryer.
  • the yarns in fabrics are made up of filaments that are twisted together. During washing, with the effects of water, friction and abrasion those filaments shed. Filaments also shed during treatment in a tumble dryer. Different types of fabric shed more than others. A tightly woven fabric with tightly twisted yarn (one that feels flat and smooth) sheds less than a loosely woven fabric with loosely twisted yarn (one that feels fluffy or fuzzy).
  • Tumble dryer sheets are used in some markets to deliver softness, anti-static and freshness benefits to fabrics during treatment, preferably drying, in a tumble dryer.
  • a dryer sheet preferably comprising a fabric softening composition
  • a vented dryer reduced the amount of fibers released from the vent of the vented tumble dryer.
  • the sheets were found to collect fibers during the drying process.
  • the fabric to be treated in the dryer can be wet or humid or it can be dry. It can be treated wet after being washed. Alternatively, the fabric can be treated dry in order to refresh it.
  • component or composition levels are in reference to the active portion of that component or composition, and are exclusive of impurities, for example, residual solvents or by-products, which may be present in commercially available sources of such components or compositions.
  • airborne fiber means a fiber that can be transported by air.
  • fabric is intended to include any object, article or item made from or containing at least in part some woven or non-woven fabric portion that may be treated in an automatic dryer cycle.
  • dryer sheet means a sheet for use in the dryer, the sheet is dry and it is not part of the fabrics to be treated.
  • the “dryer sheet” is used to provide benefits to the treated fabrics.
  • the “dyer sheet” is sometimes herein referred as the “dryer sheet of the invention”.
  • the dryer sheet disclosed herein are conveniently employed to treat fabrics in the dryer, preferably during a drying process in a dryer.
  • the dryer sheet can be used to treat fabrics that have not been washed or after the fabrics have been washed with a laundry detergent.
  • the dryer sheet of the invention comprises a substrate and optionally a fabric treatment composition, preferably a fabric softener composition.
  • Dryer sheets can be prepared by soaking an absorbent flexible substrate with a liquid mixture of a fabric treatment composition, pressing the resultant soaked sheet to remove any excess liquid and then drying the sheet. Dryer sheets known in the art are preferably prepared by coating an absorbent flexible substrate with a molten mixture of the fabric treating composition and then solidifying the mixture.
  • the fabric treatment composition transfers to the fabric during a drying operation to impart the fabric conditioning properties to the fabric.
  • At an activation temperature that is achieved during a drying cycle in a dryer at least a portion of the fabric treatment composition transfers from the substrate to the fabric to impart fabric conditioning properties.
  • the activation temperature refers to the temperature at which the fabric treatment composition transfers to the fabrics.
  • the dryer sheet can be provided from components that are considered biodegradable or compostable.
  • biodegradable or compostable are meant to refer to the ability of the dryer sheet to undergo degradation via biodegradation or hydrolysis under conditions favorable to biodegradation or hydrolysis (e.g., composting environment at 95% relative humidity and 180° F.) so that at least 95% of the components are considered degraded within a time period of about 90 days.
  • the dryer sheet can be manufactured from only materials that are considered biodegradable or compostable, or the dryer sheet can be manufactured from a combination of materials that are considered biodegradable or compostable and materials that do not satisfy the biodegradable or compostable test.
  • the dryer sheet can be provided so that it is characterized as biodegradable under ASTM D 6868-03.
  • ASTM D 6868-03 refers to the definition of biodegradability for plastics used as coatings on paper, this definition can be used for determining the biodegradability of paper products.
  • the dryer sheet preferably comprises a fibrous substrate, it can be a woven or nonwoven substrate.
  • the substrate can be a single layer substrate or dual-layer substrate.
  • a dual-layer substrate comprises a fibrous first layer, the first layer having a first layer interior surface and a first layer exterior surface opposing the first layer interior surface, wherein the first layer exterior surface has a first layer exterior surface area; a nonwoven fibrous second layer joined to the first layer, the second layer having a second layer interior surface and a second layer exterior surface opposing the second layer interior surface, wherein the second layer exterior surface has a second layer exterior surface area, wherein the second layer interior surface is oriented towards the first layer interior surface.
  • the dryer sheet preferably comprises a fabric treatment composition.
  • a dual layer-substrate part of the fabric treatment composition is preferably on the first layer interior surface and partially penetrating into the first layer; wherein the first layer exterior surface is free from the fabric treatment composition over more than about 60% of the first layer exterior surface; wherein the second layer exterior surface is free from the fabric treatment composition over more than about 60% of the second layer exterior surface.
  • the fabric treatment composition is present at a weight ratio relative to the first layer and the second layer combined from about 10:1 to about 1000:1.
  • Nonwoven fibrous materials provide for adequate function as a carrier for the cleaning microorganism and fabric treatment composition.
  • the nonwoven fibrous material can be a polyester nonwoven fibrous material.
  • the nonwoven fibrous material can be polyester terephthalate.
  • the nonwoven fibrous material can be a spun bonded polyester terephthalate.
  • the nonwoven fibrous material can be continuous filament spun bonded polyester terephthalate.
  • Other nonwoven fibrous materials, such as rayon, can also be practical.
  • the nonwoven fibrous material can have a basis weight from about 10 g/m 2 to about 50 g/m 2 . Such fibrous materials have sufficient constitution to carry the desired quantity of a treatment composition.
  • the nonwoven fibrous material can have a permeability of from about 50 Darcys to about 150 Darcys, optionally about 90 Darcys to about 140 Darcys.
  • the fibers constituting the nonwoven fibrous material can have a denier from about 2 to about 6.
  • the nonwoven fibrous material can have a caliper from about 0.1 mm to about 0.5 mm, or optionally from about 0.1 mm to about 0.4 mm. The greater the caliper, the more space within the nonwoven fibrous material to hold a fabric treatment composition.
  • the nonwoven substrate can comprise natural fiber and regenerated cellulose fiber.
  • the substrate can include a sufficient amount of regenerated cellulose fiber to provide the nonwoven substrate with desired cloth or hand feel characteristics, and to provide the nonwoven substrate with desired porosity.
  • Natural fiber refers to fiber formed from plants or animals. Natural fibers are not fibers that are formed as a result of extrusion or spinning. The natural fibers can be obtained from a source of fiber using techniques such as chemical pulping, chemical mechanical pulping, semi chemical pulping, or mechanical pulping. Natural fibers from plants are often referred to as cellulosic fibers.
  • Exemplary natural fibers that can be used to form the nonwoven substrate include wood fibers and non-wood natural fibers such as vegetable fibers, cotton, various straws (e.g., wheat, rye, and others), various canes (e.g., bagasse and kenaf), silk, animal fiber (e.g., wool), grasses (e.g., bamboo, etc.), hemp, corn stalks, abaca, etc.
  • wood fibers and non-wood natural fibers such as vegetable fibers, cotton, various straws (e.g., wheat, rye, and others), various canes (e.g., bagasse and kenaf), silk, animal fiber (e.g., wool), grasses (e.g., bamboo, etc.), hemp, corn stalks, abaca, etc.
  • Wood fiber can be obtained from wood pulp.
  • the wood pulp can include hardwood fibers, softwood fibers, or a blend of hardwood fibers and softwood fibers.
  • the pulp can be provided as cellulose fiber from chemical pulped wood, and can include a blend from coniferous and deciduous trees.
  • wood fibers can be from northern hardwood, northern softwood, southern hardwood, or southern softwood.
  • Hardwood fibers tend to be more brittle but are generally more cost effective for use because the yield of pulp from hardwood is higher than the yield of pulp from softwood.
  • the pulp can contain about 0 to about 100% or about 0 to about 70% hardwood fibers based on the weight of the fibers.
  • Softwood fibers have desired paper making characteristics but are generally more expensive than hardwood fibers.
  • the pulp can contain about 0 to about 100% softwood fibers based on the weight of the fibers.
  • the pulp can contain a blend of hardwood and softwood fibers.
  • the natural fibers can be extracted with various pulping techniques.
  • mechanical or high yield pulping can be used for stone ground wood, pressurized ground wood, refiner mechanical pulp, and thermomechanical pulp.
  • Chemical pulping can be used incorporating kraft, sulfite, and soda processing.
  • Semi-chemical and chemi-mechanical pulping can also be used which includes combinations of mechanical and chemical processes to produce chemi-thermomechanical pulp.
  • the natural fibers can also be bleached or unbleached.
  • One of skill in the art will appreciate that the bleaching can be accomplished through many methods including the use of chlorine, hypochlorite, chlorine dioxide, oxygen, peroxide, ozone, or a caustic extraction.
  • the pulp can include a recycle source for reclaimed fiber.
  • recycle sources include post-consumer waste (PCW) fiber, office waste, and corrugated carton waste.
  • Post-consumer waste fiber refers to fiber recovered from paper that is recycled after consumer use.
  • Office waste refers to fiber obtained from office waste, and corrugated carton waste refers to fiber obtained from corrugated cartons.
  • Additional sources of reclaimed fiber include newsprint and magazines.
  • Reclaimed fiber can include both natural and synthetic fiber. Incorporation of reclaimed fiber in the nonwoven substrate can aid in efficient use of resources and increase satisfaction of the end user of the dryer sheet.
  • Refining is the treatment of pulp fibers to develop their papermaking properties. Refining increases the strength of fiber to fiber bonds by increasing the surface area of the fibers and making the fibers more pliable to conform around each other, which increases the bonding surface area and leads to a denser sheet, with fewer voids. Most strength properties of paper increase with pulp refining, since they rely on fiber to fiber bonding. The tear strength, which depends highly on the strength of the individual fibers, has a tendency to decrease with refining. Refining of pulp increases the fibers flexibility and leads to a denser substrate. This means bulk, opacity, and porosity decrease (densometer values increase) with refining. Fibrillation is a result of refining paper fibers. Fibrillation is the production of rough surfaces on fibers by mechanical and/or chemical action; refiners break the outer layer of fibers, e.g., the primary cell wall, causing the fibrils from the secondary cell wall to protrude from the fiber surfaces.
  • the fibers can be refined so that the resulting nonwoven substrate provides the desired Canadian Standard Freeness value. In general, less refined fiber can provide a nonwoven substrate having more holes and voids and thereby permitting greater penetration into the nonwoven substrate. It may be desirable to provide a desired level of refining to control the presence of holes or voids so that the nonwoven substrate can contain a desired amount or loading of the fabric conditioning agent.
  • the nonwoven substrate can comprise natural fiber and regenerated cellulose fiber.
  • the substrate can include a sufficient amount of regenerated cellulose fiber to provide the nonwoven substrate with desired cloth or hand feel characteristics, and to provide the nonwoven substrate with desired porosity.
  • Regenerated cellulose fiber can be considered a type of fiber prepared from cellulose and wherein the fiber is formed as a result of extrusion or spinning.
  • An exemplary regenerated cellulose fiber can be referred to as rayon or as viscose. It is understood that viscose is generally another term for rayon.
  • the nonwoven substrate can contain a sufficient amount of the regenerated cellulose fiber so that the dryer sheet exhibits desirable cloth and hand feel characteristics.
  • the cloth or hand feel characteristics of the dryer sheet can be provided so that they are similar to the cloth or hand feel characteristics of commercial dryer sheet products such as those available under the names Bounce ® and Downy ® from The Procter & Gamble Company.
  • the natural fiber can provide a nonwoven substrate for use as a dryer sheet that is relatively inexpensive but has a tendency to provide the dryer sheet with stiffness.
  • Regenerated cellulose fiber can be included in the nonwoven substrate in an amount sufficient to improve the cloth and hand feel characteristics of the nonwoven substrate.
  • the nonwoven substrate can contain a sufficient amount of the regenerated cellulose fiber so that the resulting nonwoven substrate has a desired level of porosity or air permeability.
  • providing the nonwoven substrate with a desired level of air permeability allows the nonwoven substrate to handle or contain a desired amount or loading of fabric conditioning agent.
  • the air permeability of the nonwoven substrate can be controlled to allow for sufficient loading of the fabric conditioning agent onto the nonwoven substrate. It can be desirable for the nonwoven substrate to have an air permeability of at least 1.83 m 3 per minute per m 2 ( 6 CFM (cubic feet per minute per ft2)) according to Tappi T 251CM-85.
  • the nonwoven substrate can be prepared from fibers containing natural fiber, regenerated cellulose fiber, or a mixture of natural fiber and regenerated cellulose fiber.
  • the nonwoven substrate can contain 0 wt. % to 100 wt. % natural fiber and can contain 0 wt. % to 100 wt. % regenerated cellulose fiber, based on the weight of the fiber of the nonwoven substrate.
  • the nonwoven substrate can be prepared from a mixture of natural fiber and regenerated cellulose fiber.
  • the nonwoven substrate can be prepared from a mixture containing about 10 wt. % to about 95 wt. % natural fiber, about 20 wt.
  • the nonwoven substrate can be prepared from a mixture containing about 0.5 wt. % to about 75 wt. % regenerated cellulose fiber, about 2 wt. % to about 60 wt. % regenerated cellulose fiber, about 10 wt. % to about 55 wt. % regenerated cellulose fiber, or about 20 wt. % to about 50 wt. % regenerated cellulose fiber.
  • the weight percent of fiber is based upon the fiber content of the nonwoven substrate.
  • regenerated cellulose fiber having a length that is as long as possible to form a nonwoven substrate on a paper making machine in order to obtain the maximum benefit of the presence of the regenerated cellulose fiber.
  • an exemplary regenerated cellulose fiber length that can be used on a paper making machine is about 3 mm to about 6 mm (about 1 ⁇ 8 inch to about 1 ⁇ 4 inch). It may be desirable to provide the regenerated cellulose fiber having a length of up to about 5.08 cm ( about 2 inches).
  • the regenerated cellulose fiber can have a denier selected to provide desired cloth or hand feel characteristics. In general, a small denier can be used to enhance the cloth or hand feel characteristics. Fibers having a larger denier tend to be more coarse. Accordingly, the regenerated cellulose fiber can have a denier of about 0.5 to about 20, a denier of about 0.5 to about 10, a denier of about 0.5 to about 5, or a denier of about 1.0 to about 2.
  • the nonwoven fibrous material can comprise bicomponent fibers.
  • the bicomponent fibers can be core-sheath constructions or lobed constructions.
  • the nonwoven fibrous material can comprise bicomponent fibers that are polyethylene/polyethylene terephthalate core-sheath constructions, with either constituent forming the core or sheath.
  • the bicomponent fibers can be polyethylene/polypropylene, with either constituent forming the core or sheath.
  • the nonwoven fibrous material can be the nonwoven fibrous material used presently or in the past or like that used presently or in the past in BOUNCE dryer sheets, available from The Procter & Gamble Company, Cincinnati, OH, United States of America, SNUGGLE dryer sheets, available from Henkel Corporation, Stamford, Connecticut, United States of America, and or SUAVITEL dryer sheets, available from Colgate-Palmolive Company, New York, New Yok, United States of America.
  • the nonwoven fibrous material can be cellulose.
  • the dryer sheet can be practically formed using a continuous web converting process.
  • a nonwoven fibrous web can be provided.
  • the nonwoven fibrous web can have a top surface and an opposing bottom surface and a pair of web transverse edges.
  • a fabric treatment composition preferably a fabric softener composition, can be applied to the top surface.
  • the nonwoven fibrous web can be folded toward the top surface about a fold line that divides the first layer and the second layer to bring the web transverse edges into alignment with one another so that the second layer is above the first layer.
  • the nonwoven fibrous web can be cut to form the dryer sheet.
  • the nonwoven fibrous web can practically be cut before it is folded or after it is folded but may be simpler to convert if the nonwoven fibrous web is cut after being folded.
  • the fabric treatment composition can be applied to the top surface by slot coating, spray coating, kiss rolling, printing, rotogravure, and other processes for applying the cleaning microorganisms as a liquid.
  • One practical approach for applying the fabric treatment composition to a nonwoven fibrous material, as the nonwoven fibrous layers are employed herein, is to slot coat the nonwoven fibrous material and use a scraper set at or just above the surface to which the composition is applied to scrape off the composition at some level at or above the surface of the nonwoven fibrous material so that excess composition is removed.
  • the fabric treatment composition may partially penetrate into the nonwoven fibrous web.
  • the fabric treatment composition may be applied to one of what becomes the first layer interior surface and or the second layer interior surface.
  • the step of folding can be conveniently accomplished with a folding rail. Other folding process may be employed if the nonwoven fibrous web is cut in the cross direction CD prior to folding or individual pieces of nonwoven fibrous web are provided and then each dryer sheet is folded individually.
  • the web transverse edges can be bonded to one another.
  • the step of bonding can be performed before or after the step of cutting in the cross direction CD.
  • the bonding can provide coherency to the dryer sheet as described previously.
  • the layers can be embossed to provide embossments to the layers and to squeeze the fabric treatment composition, if present, within the layers so that the fabric treatment composition fully penetrates the layers.
  • Embossing can be accomplished by an embossing roll such as a cylindrical roll having raised embossing features of the desired pattern that is in operative relationship with an anvil roll.
  • the first layer and the second layer can be provided integral with one another as a single nonwoven fibrous web moving in the machine direction MD.
  • the fabric treatment composition can be applied to the first layer interior surface and or the second layer interior surface, if the first layer and second layer are provided as individual lanes, or the nonwoven fibrous web can be cut in the machine direction MD after the fabric treatment composition is applied to form lanes of the material that ultimately becomes the first layer and second layer.
  • One of the first layer and the second layer can be flipped. Flipping can position the surface of the layers to which the treatment composition is applied to be oriented towards one another when the first layer is stacked onto the second layer. Flipping can be performed before or after the nonwoven fibrous web is cut in the cross direction CD.
  • the first layer and the second layer can be stacked so that the first layer interior surface is oriented towards the second layer interior surface.
  • the first layer can be bonded to the second layer, which provides the benefit of helping to maintain the form of the dryer sheet before, during, and after use.
  • the dryer sheet preferable comprises a fabric treatment composition
  • the fabric treatment composition can provide care, fragrance, antiwrinkle, color protection, antistatic, softening benefits and any other benefits that add to the longevity and good feeling of fabrics.
  • the fabric treatment composition can be a fabric softening composition such as any of the fabric softening compositions used presently or in the past or like that used presently or in the past in BOUNCE dryer sheets, available from The Procter & Gamble Company, Cincinnati, OH, United States of America, SNUGGLE dryer sheets, available from Henkel Corporation, Stamford, Connecticut, United States of America, and or SUAVITEL dryer sheets, available from Colgate-Palmolive Company, New York, New Yok, United States of America
  • the fabric treatment composition is preferably a fabric softening composition.
  • the fabric softening composition preferably comprises from about 10% to about 90% by weight of the composition of a softening agent, preferably a quaternary ammonium softening compound.
  • the quaternary ammonium softening compound may be ester and or amide linked.
  • the fabric softening composition may comprise a cationic nitrogen-containing compound such as a quaternary ammonium compound having one or two straight-chain organic groups of at least 8 carbon atoms; optionally one or two such groups of from 12 to 22 carbon atoms and, optionally be ester and or amide linked.
  • a cationic nitrogen-containing compound such as a quaternary ammonium compound having one or two straight-chain organic groups of at least 8 carbon atoms; optionally one or two such groups of from 12 to 22 carbon atoms and, optionally be ester and or amide linked.
  • the fabric softening composition may comprise ingredients such as a nonionic material.
  • Suitable nonionic materials may include polyoxyalkylene glycols, higher fatty alcohol esters of polyoxyalkylene glycols, higher fatty alcohol esters of polyoxyalkylene glycols, ethoxylates of long chained alcohols of from 8 to 30 carbon atoms such as the ethoxylates of coconut, palm, tallow alcohols or hydrogenated alcohols with 4 to 40 moles of ethylene oxide, and alkanolamides.
  • the fabric softening composition may further comprise, with or without a non-ionic material, fatty acids, ethoxylated fatty acids, and combinations thereof.
  • Suitable fatty acids include those wherein the long chain is unsubstituted or substituted alkyl or alkenyl group of from about 8 to 30 carbon atoms.
  • Examples of specific fatty acids are lauric, palmitic, stearic, oleic, and/or combinations thereof.
  • the fabric softening composition can contain less than about 5% by weight of fatty acid.
  • the fabric softening composition can be selected from the group consisting of polyglyceryl distearate, parrafin wax, branched parrafin wax, polyglyceryl ethers, and combinations thereof. Suitable fabric softening compositions include cationic, anionic, nonionic, or zwitterionic compounds.
  • the fabric softening composition can be a quaternary imidazolinium salt.
  • the fabric softening composition can be a polyoxyalkylene glycol, including higher fatty alcohol esters of polyoxyalkylene glycol and higher fatty alcohol ethers of polyoxyalkylene glycol.
  • the fabric softening composition can be a fatty acid ester of sorbitan and ethoxylates of such esters.
  • the fabric treatment composition can comprise a variety of ingredients.
  • the fabric treatment composition may comprise unencapsulated perfume, encapsulated perfume, and combinations thereof.
  • the encapsulated perfume if provided, can be selected from the group consisting of friable encapsulates, moisture activated encapsulates, heat activated encapsulates and combinations thereof.
  • the fabric softening composition can comprise ingredients selected from the group consisting of softening agents, soil release agents, anti-static agents, crisping agents, water/stain repellents, stain release agents, refreshing agents, disinfecting agents, wrinkle resistant agents, wrinkle release agents, odor resistance agents, malodor control agents, abrasion resistance and protection agents, solvents, insect/pet repellents, wetting agents, chlorine scavenging agents, optical brighteners, UV protection agents, skin/fabric conditioning agents, skin/fabric nurturing agents, skin/fabric hydrating agents, color protection agents, dye fixatives, dye transfer inhibiting agents, silicones, preservatives and anti-microbials, fungicides, fabric shrinkage-reducing agents, brighteners, hueing dyes, bleaches, chelants, antifoams, anti-scum agents, whitening agents, catalysts, cyclodextrin, zeolite, petrolatum, glycerin, triglycerides, vitamins, other skin care actives such as aloe
  • the dryer sheet can further comprise 0.1% to about 20% by weight perfume.
  • the perfume can be unencapsulated perfume, encapsulated perfume, perfume provided by a perfume delivery technology, or a perfume provided in some other manner. Perfumes are generally described in U.S. Patent No. 7,186,680 at column 10, line 56, to column 25, line 22.
  • the dryer sheet can comprise unencapsulated perfume and are essentially free of perfume carriers, such as a perfume microcapsules.
  • the dryer sheet can comprise perfume carrier materials (and perfume contained therein). Examples of perfume carrier materials are described in U.S. Patent No. 7,186,680 , column 25, line 23, to column 31, line 7. Specific examples of perfume carrier materials may include cyclodextrin and zeolites.
  • the dryer sheet can comprise about 0.1% to about 20%, alternatively about 1% to about 15%, alternatively 2% to about 10%, alternatively combinations thereof and any whole percentages within any of the aforementioned ranges, of perfume by weight of the dryer sheet.
  • the dryer sheet can comprise from about 0.1% by weight to about 6% by weight of the dryer sheet of perfume.
  • the perfume can be unencapsulated perfume and or encapsulated perfume.
  • the dryer sheet can be free or substantially free of a perfume carrier.
  • the dryer sheet may comprise about 0.1% to about 20%, alternatively about 1% to about 15%, alternatively 2% to about 10%, alternatively combinations thereof and any whole percentages within any dryer sheet.
  • the dryer sheet can comprise unencapsulated perfume and perfume microcapsules.
  • the dryer sheet may comprise about 0.1% to about 20%, alternatively about 1% to about 15%, alternatively from about 2% to about 10%, alternatively combinations thereof and any whole percentages or ranges of whole percentages within any of the aforementioned ranges, of the unencapsulated perfume by weight of the dryer sheet.
  • Such levels of unencapsulated perfume can be appropriate for any of the dryer sheet disclosed herein that have unencapsulated perfume.
  • the dryer sheet can comprise unencapsulated perfume and a perfume microcapsule but be free or essentially free of other perfume carriers.
  • the dryer sheet can comprise unencapsulated perfume and perfume microcapsules and be free of other perfume carriers.
  • the dryer sheet can comprise encapsulated perfume.
  • Encapsulated perfume can be provided as plurality of perfume microcapsules.
  • a perfume microcapsule is perfume oil enclosed within a shell.
  • the shell can have an average shell thickness less than the maximum dimension of the perfume core.
  • the perfume microcapsules can be friable perfume microcapsules.
  • the perfume microcapsules can be moisture activated perfume microcapsules.
  • the perfume microcapsules can comprise a melamine/formaldehyde shell.
  • Perfume microcapsules may be obtained from Appleton, Quest International, or International Flavor & Fragrances, or other suitable source.
  • the perfume microcapsule shell can be coated with polymer to enhance the ability of the perfume microcapsule to adhere to fabric. This can be desirable if the particles are designed to be a fabric treatment composition.
  • the perfume microcapsules can be those described in U.S. Patent Pub. 2008/0305982 .
  • the dryer sheet can comprise about 0.1% to about 20%, alternatively about 0.1% to about 10%, alternatively about 1% to about 15%, alternatively 2% to about 10%, alternatively combinations thereof and any whole percentages within any of the aforementioned ranges, of encapsulated perfume by weight of the dryer sheet.
  • the dryer sheet can comprise perfume microcapsules but be free of or essentially free of unencapsulated perfume.
  • the particles may comprise about 0.1% to about 20%, alternatively about 1% to about 15%, alternatively about 2% to about 10%, alternatively combinations thereof and any whole percentages within any of the aforementioned ranges, of encapsulated perfume by weight of the dryer sheet.
  • the following examples involve testing conducted to evaluate the impact of dryer sheets on airborne fiber release from vented tumble dryers. Each test involved four washing and drying cycles of a new unsoiled laundry load comprising 10 cotton T-shirts (Fruit of the Loom ® Original T-shirt, product code 61-082, size L, 100% cotton, density 145 g/m 2 ) and 10 polyester T-shirts (Fruit of the Loom ® Performance T-shirt, product code 61-390, size L, 100% polyester, density 140 g/m 2 ).
  • Treatments were rotated between the four washing machines and conducted in triplicate for four consecutive washing cycles. After each wash cycle, the wash loads were dried using Indesit ® vented tumble dryers (model IDV75) for one hour on the high heat setting. The detergent was added to the drum of the washing machine at the start of each cycle. In legs where they are present, dryer sheets are added to the damp laundry load at the start of each drying cycle.
  • released fibers were collected from the exhaust of the tumble dryer using a 20 ⁇ m CellMicroSieve ® (BioDesign Inc., Carmel, N.Y., U.S.A.), attached to the dryer exhaust using a 100 mm plastic pipe connector (model 414c, Manrose Manufacturing Ltd., U.K.).
  • the CellMicroSieve ® was connected to one side of the plastic pipe connector using 450 mm long, 10 mm wide cable ties (product 90526, Screwfix Direct Ltd., U.K.).
  • the built-in lint filter designed to safely collect fibers produced by the dryer for safe disposal in household waste was cleaned and its fiber contents suspended in around 1L of cold tap water.
  • the CellMicroSieve ® attached to collect fibers released from the dryer exhaust was washed thoroughly and its fiber contents suspended in around 3L of cold tap water.
  • the fibers collected at both the lint filter and dryer exhaust were quantified gravimetrically by filtration onto white filter paper using the protocol described in Lant NJ, Hayward AS, Peththawadu MMD, Sheridan KJ, Dean JR. Microfiber release from real soiled consumer laundry and the impact of fabric care products and washing conditions.
  • Results show that the use of tumble dryer sheets in accordance with the invention significantly reduced the level of airborne fibers released from the dryer exhaust by 14.1-34.9% relative to the comparative example which did not involve dryer sheet use.
  • the use of dryer sheets did not have any significant impact on airborne fiber collection on the dryer lint filter.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Claims (14)

  1. Verwendung eines Trocknertuchs, um eine Freisetzung von Fasern in der Luft während der Behandlung von Textilien in einem Ablufttrommeltrockner zu reduzieren.
  2. Verwendung eines Trocknertuchs nach Anspruch 1, wobei die Behandlung Trocknen ist.
  3. Verwendung eines Trocknertuchs nach einem der Ansprüche 1 oder 2, wobei das Tuch ein Vliessubstrat umfasst.
  4. Verwendung eines Trocknertuchs nach dem vorstehenden Anspruch, wobei das Vliessubstrat Polyester umfasst.
  5. Verwendung eines Trocknertuchs nach Anspruch 3, wobei das Vliessubstrat Naturfasern umfasst.
  6. Verwendung eines Trocknertuchs nach dem vorstehenden Anspruch, wobei die Naturfasern Cellulosefasern umfassen.
  7. Verwendung eines Trocknertuchs nach einem der vorstehenden Ansprüche, wobei das Tuch eine Textilbehandlungszusammensetzung umfasst.
  8. Verwendung eines Trocknertuchs nach dem vorstehenden Anspruch, wobei die Textilbehandlungszusammensetzung eine Weichmacherzusammensetzung umfasst.
  9. Verwendung eines Trocknertuchs nach dem vorstehenden Anspruch, wobei die Textilweichmacherzusammensetzung eine weichmachende quartäre Ammoniumverbindung umfasst.
  10. Verwendung eines Trocknertuchs nach einem der Ansprüche 8 oder 9, wobei die Textilweichmacherzusammensetzung eine Fettsäure umfasst.
  11. Verwendung eines Trocknertuchs nach einem der Ansprüche 7 bis 10, wobei die Textilbehandlungszusammensetzung einen Duftstoff umfasst.
  12. Verwendung eines Trocknertuchs nach einem der vorstehenden Ansprüche, wobei die Textilien einem ersten Textilbehandlungsverfahren unterzogen wurden, wobei das erste Behandlungsverfahren vor dem Trocknen eine Spülstufe in Gegenwart einer Textilweichmacherzusammensetzung umfasst.
  13. Verwendung nach einem der vorstehenden Ansprüche, wobei das erste Textilbehandlungsverfahren in einer Waschmaschine stattfindet.
  14. Verwendung nach einem der Ansprüche 12 oder 13, wobei die Textilweichmacherzusammensetzung in die letzte Spülstufe abgegeben wird.
EP21212492.9A 2021-12-06 2021-12-06 Verwendung eines trocknerblatts zur verminderung der luftfreisetzung von fasern aus einem trockner Active EP4190968B1 (de)

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Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5470492A (en) * 1993-09-10 1995-11-28 The Procter & Gamble Company Dryer-activated fabric conditioning articles with soft polyester substrate
ATE307185T1 (de) * 1999-10-05 2005-11-15 Ciba Sc Holding Ag Verwendung von wäscheweichmacherzusammensetzungen
US20030104969A1 (en) 2000-05-11 2003-06-05 Caswell Debra Sue Laundry system having unitized dosing
US20100251486A1 (en) * 2006-04-14 2010-10-07 The Dial Corporation Laundry article
US7947644B2 (en) * 2006-09-26 2011-05-24 Wausau Paper Mills, Llc Dryer sheet and methods for manufacturing and using a dryer sheet
CN101677956A (zh) 2007-06-11 2010-03-24 阿普尔顿纸张公司 包含有益剂的递送颗粒
AR084057A1 (es) * 2010-12-01 2013-04-17 Procter & Gamble Composiciones para el cuidado de telas

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