EP0717772A1 - Articles pour le traitement de linge, actives dans le seche-linge et comprenant un substrat en polyester doux au toucher - Google Patents

Articles pour le traitement de linge, actives dans le seche-linge et comprenant un substrat en polyester doux au toucher

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Publication number
EP0717772A1
EP0717772A1 EP94927998A EP94927998A EP0717772A1 EP 0717772 A1 EP0717772 A1 EP 0717772A1 EP 94927998 A EP94927998 A EP 94927998A EP 94927998 A EP94927998 A EP 94927998A EP 0717772 A1 EP0717772 A1 EP 0717772A1
Authority
EP
European Patent Office
Prior art keywords
fabric conditioning
substrate
dryer
article
fabric
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
EP94927998A
Other languages
German (de)
English (en)
Inventor
Stephen Lee Childs
Alvin Michael Robertson
Alessandro Corona, Iii
Karl Joseph Russ
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
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 Procter and Gamble Co filed Critical Procter and Gamble Co
Publication of EP0717772A1 publication Critical patent/EP0717772A1/fr
Ceased legal-status Critical Current

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Classifications

    • 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
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving

Definitions

  • the present invention relates to an improvement in dryer activated, e.g., dryer-added, softening products. These products are prepared by attaching compositions to a substrate.
  • the present invention relates to dryer-activated fabric softening articles comprising improved polyester substrates for use in an automatic clothes dryer. These articles comprise:
  • (A) at least about 5%, preferably from about 10% to about 90%, more preferably from about 10% to about 75%, and even more preferably from about 15% to about 55%, of fabric conditioning composition comprising fabric conditioning active and
  • the present invention relates to dryer-added fabric softening articles comprising substrates with improved feel after use, for use in an automatic clothes dryer. It has surprisingly been found that consumers who have used dryer-added fabric softener articles prepared with rayon non-woven substrates find that similar articles prepared with spun-bonded polyester substrates are not as soft after use, when the substrate is removed from the clothes.
  • the improved articles herein comprise:
  • (A) at least about 5%, preferably from about 10% to about 90%, more preferably from about 10% to about 75%, and even more preferably from about 15% to about 55%, of fabric conditioning composition comprising fabric conditioning active;
  • polyester having improved feel character- istics as compared to conventional substrates of this type, after said article is used in said automatic clothes dryer and after said fabric conditioning com ⁇ position has been substantially completely removed from said substrate.
  • the "feel" problem associated with the spun-bonded polyester substrates was not known heretofore so no one knew to look for any solution to the problem.
  • the feel can also be improved by increased plasticizer usage and/or applying a softener to the surface of the substrate, e .3cially in combination with, or after, application of a soil release polymer.
  • the invention comprises articles comprising spun-bonded polyester substrates having improved feel after use, regardless of the approach taken.
  • the active components can contain unsaturation for additional antist ic benefits.
  • the components are selected so that the result ⁇ fabric treatment composition has a melting point above about C and is flowable at dryer operating temperatures.
  • the fabric conditioni composition can be any of those known in the art and/or previou , disclosed by others in patent appli ⁇ cations.
  • Compositions that are suitable are disclosed in U.S. Pat. Nos.: 3,944,694, McQueary; 4,073,996, Bedenk et al . ; 4,237,155, ardouche; 4,711,730, Gosselink et al . ; 4,749,596, Evans et al . ; 4,808,086, Evans et al . ; 4,818,569, Trinh et al . ; 4,877,896, Maldonado et al . ; 4,976,879, Maldonado et al .
  • compositions of the present invention can contain from 0% to about 90%, preferably from 0% to about 80%, more preferably from
  • quaternary ammonium compound preferably ester, and/or amide linked.
  • the quaternary ammonium compounds are typically of the Formulas I, II, and mixtures thereof.
  • Formula I comprises:
  • each R is a short chain C]-C6, preferably C1-C3, alkyl or hydroxy alkyl group, e.g., methyl (most preferred), ethyl, hydroxyethyl , propyl, and the like, benzyl and mixtures thereof; each R 2 is a long chain, saturated and/or unsaturated (Iodine Value - "IV" of from about 3 to about 60), C8-C30 hydrocarbyl, or substituted hydrocarbyl substituent and mixtures thereof; R 3 is R or H; and the counterion, X-, can be
  • the preferred ester linked compounds can be considered to be diester variations of ditallow dimethyl ammonium chloride (DTDMAC), which is a widely used fabric softener.
  • DTDMAC ditallow dimethyl ammonium chloride
  • at least 80% of the DEQA is in the diester form, and from 0% to about 20%, preferably less than about 10%, more preferably less than about 5%, can be DEQA monoester (e.g., only one -Y-R2 group).
  • monoester e.g., only one -Y-R2 group.
  • monoester should be low, preferably less than about 2.5%.
  • the level of monoester can be controlled in the manufacturing of the DEQA.
  • The- quaternary softening compounds with at least partially unsaturated alkyl or acyl groups have advantages (i.e., antistatic benefits) and are highly acceptable for consumer products when certain conditions are met. Antistatic effects are especially important where the fabrics are dried in a tumble dryer, and/or where synthetic materials which generate static are used.
  • Any reference to IV values hereinafter refers to IV of fatty alkyl or acyl groups and not to the resulting quaternary, e.g., DEQA compound. As the IV is raised, there is a potential for odor problems.
  • the optimum storage tem ⁇ perature for stability and fluidity depends on the specific IV of, e.g., the fatty acid used to make DEQA and/or the level/type of solvent selected. Exposure to oxygen should be minimized to keep the unsaturated groups from oxidizing.. It can therefore be important to store the material under a reduced oxygen atmosphere such as a nitrogen blanket. It is important to provide good molten storage stability to provide a commercially feasible raw material that will not degrade noticeably in the normal trans ⁇ portation/storage/handling of the material in manufacturing operations.
  • DEQA Formula I (wherein all long-chain alkyl substituents are straight-chain): Saturated
  • compositions and articles- of the present invention comprise DEQA compounds of Formula II:
  • the straight or branched alkyl or alkenyl chains, Ti and T 2 have from about 8 to about 30 carbon atoms, preferably from about 14 to about 18 carbon atoms, more preferably straight chains having from about 14 to about 18 carbon atoms.
  • the composition can also contain a ethoxylated and/or pro- poxylated sugar derivative contains a "sugar” moiety, e.g., a moiety derived from, e.g., a polyhydroxy sugar, or sugar alcohol, that contains from about 4 to about 12 hydroxy groups.
  • This sugar moiety is substituted by at least one long hydrophobic group, containing from about 8 to about 30 carbon atoms, preferably from about 16 to about 18 carbon atoms.
  • the hydrophobic group can contain more carbon atoms, e.g., 20-22, and/or there can be more than one hydrophobic group, preferably two or, less preferably, three.
  • the hydrophobic group is supplied by esterifying one of the hydroxy groups with a fatty acid.
  • the hydrophobic group can be supplied by este ⁇ - fying the hydroxy group to connect the hydrophobic group to the sugar moiety by an ether linkage, and/or a moiety containing a carboxy group esterified with a fatty alcohol can be attached to the sugar moiety to provide the desired hydrophobic group.
  • Sugar moieties include sucrose, galactose, mannose, glucose, fructose, sorbitan, sorbitol, mannitol, inositol, etc.,. and/or their derivatives such as glucosides, galactosides, etc.
  • Other "sugar” types of moieties containing multiple hydroxy groups can also be used including starch fractions and polymers such as polyglycerols.
  • the sugar moiety is any polyhydroxy group that provides the requisite number of hydroxy groups.
  • the hydrophobic group can be provided by attachment with an ester, ether, or other linkage that provides a stable compound.
  • the hydrophobic group is preferably primarily straight chain, and preferably contains some unsaturation to provide additional antistatic benefits.
  • Such hydrophobic groups and their sources are well known, and are described hereinafter with respect to the more conventional types of softening agents.
  • the polyalkoxy chain can be all ethoxy groups, and/or can contain other groups such as propoxy, glyceryl ether, etc., groups.
  • polyethoxy groups are preferred, but for improved properties such as biodegradability, glyceryl ether groups can be inserted.
  • R is a hydrophobic group containing from about 8 to about 30, preferably from about 12 to about 22, more preferably from about 16 to about 18 carbon atoms;
  • “sugar” refers to a polyhydroxy group, preferably derived from a sugar, sugar alcohol, or similar polyhydroxy compound;
  • Rl is an alkylene group, preferably ethylene or propylene, more preferably ethylene;
  • m is a number from 1 to about 4, preferably 2; and
  • n is a number from about 5 to about 100, preferably from about 10 to about 40.
  • a preferred compound of this type is polyethoxy!ated sorbitan monostearate, e.g., Glycosperse S-20 from Lonza, which contains about 20 ethoxy!ate moieties per molecule.
  • The- level of the polyethoxy sugar derivative is typically at least about 5%, preferably at least about 10%, more preferably at least about 15%.
  • the maximum level is no more than about 90%, more preferably no more than about 75%.
  • the polyethoxy sugar derivative provides improved antistatic properties to the compositions and can provide equivalent anti- static properties to conventional dryer added compositions, and/or articles, even with less, or no, quaternary ammonium softener materials present. It is possible to prepare a dryer-added composition, or article, that is entirely nonionic.
  • Fabric softening compositions employed herein can also contain, as a preferred component, at a level of from about 0% to about 95%, preferably from about 10% to about 75%, more preferably from about 20% to about 60%, carboxylic acid salt of a tertiary amine which has the formula:
  • R9 is alkyl and alkenyl of from about 1 to about 30 carbon atoms and hydrogen, n is 2 or 3, and m is from about 1 to about 30, and wherein R ⁇ is selected from the group consisting of unsubstituted alkyl, alkenyl, aryl, alkaryl and aralkyl of about 1 to about 30 carbon atoms, and substituted alkyl, alkenyl, aryl, alkaryl, and aralkyl of from about 1 to about 30 carbon atoms wherein the substituents are selected from the group consisting of halogen, carboxyl, and hydroxyl, said composition having a melting point of from about 35'C to about lOO'C.
  • This component can provide the following benefits: superior odor, a decrease in paint softening of the dryer drum, and/or improved fabric softening performance, compared to similar articles without this component.
  • Either R5, R6, R7, and/or R 8 chains can contain unsaturation for improved antistatic benefits.
  • Tertiary amine salts of carboxylic acids have superior chemical stability, compared to primary and secondary amine carboxylate salts.
  • primary and secondary amine carboxylates tend to form amides when heated, e.g., during pro ⁇ cessing or use in the dryer. Also, they absorb carbon dioxide, thereby forming high melting carba ates which build up as an undesirable residue on treated fabrics.
  • R 5 is an aliphatic chain containing from about 12 to about 30 carbon atoms
  • R 6 is an aliphatic chain of from about 1 to about 30 carbon atoms
  • R 7 is an aliphatic chain of from about 1 to about 30 carbon atoms.
  • Particularly preferred tertiary amines for static control performance are those containing unsatu- ration; e.g., oleyldimethylamine and/or soft tallowdimethylamine.
  • Examples of preferred tertiary amines as starting material for the reaction between the amine and carboxylic acid to for the tertiary ami ⁇ e salts are: lauryldi ethylamine, myristyldimethyl- amine, stearyldimethylamine, tallowdimethylamine, coconutdimethyl- amine, .
  • dilaurylmethylamine distearylmethyla ine, ditallowmethyl- amine, oleyldimethylamine, dioleyl methylamine, lauryldi(3-hy- droxypropyl)amine, stearyldi(2-hydroxyethyl)amine, trilauryla ine, laurylethylmethylamine, and Ci8H37N[(OC 2 H4) ⁇ oOH] 2 .
  • Preferred fatty acids are those wherein R8 is a long chain, unsubstituted alkyl or alkenyl group of from about 8 to about 30 carbon atoms, more preferably from about 11 to about 17 carbon atoms.
  • Examples of specific carboxylic acids as a starting material are: formic acid, acetic acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, oxalic acid, adipic acid, 12-hydroxy stearic acid, benzoic acid, 4-hydroxy benzoic acid, 3-chloro benzoic acid, 4-nitro benzoic acid, 4-ethyl benzoic acid, 4-(2-chloroethyl)benzoic acid, phenylacetic acid, (4-chloro- phenyl)acetic acid, (4-hydroxyphenyl)acetic acid, and. phthalic acid.
  • Preferred carboxylic acids are stearic, oleic, lauric, myristic, palmitic, and mixtures thereof.
  • the amine salt can be formed by a simple addition reaction, well known in the art, disclosed in U.S. Pat. No. 4,237,155, Kardouche, issued Dec. 2, 1980. Excessive levels of free, amines may result in odor problems, and generally free amines provide poorer softening performance than the amine salts.
  • Preferred amine salts for use herein are those wherein the amine moiety is a C8-C30 alkyl or alkenyl dimethyl amine or a di-C8- 30 alkyl or alkenyl methyl amine, and the acid moiety is a C8-C30 alkyl or alkenyl monocarboxylic acid.
  • the amine and the acid, respectively, used to form the amine salt will often be of mixed chain lengths rather than single chain lengths, since these materials are normally derived from natural fats and oils, or synthetic processed which produce a mixture of chain lengths. Also, it is often desirable to utilize mixtures of different chain lengths in order to modify the physical or performance character ⁇ istics of the softening composition.
  • Specific preferred amine salts for use in the present inven ⁇ tion are oleyldimethylamine stearate, stearyldi ethylamine stear ⁇ ate, stearyldimethylamine yristate, stearyldimethylamine palmi- tate, distearylmethylamine palmitate, distearylmethylamine laur- ate, and mixtures thereof.
  • a particularly preferred mixture is oleyldimethylamine stearate and distearylmethylamine myristate, in a ratio of 1:10 to 10:1, preferably about 1:1.
  • Optional Nonionic Softener A highly preferred optional ingredient is a nonionic fabric softening agent/material. Typically, such nonionic fabric softener materials have an HLB of from about 2 to about 9, more typically from about 3 to about 7. In general, the materials selected should be relatively crystalline, higher melting, (e.g., >25'C).
  • the level of optional nonionic softener in the solid compo ⁇ sition is typically from about 10% to about 50%, preferably from about 15% to about 40%.
  • Preferred nonionic softeners are fatty acid partial esters of polyhydric alcohols, or anhydrides thereof, wherein the alcohol, or anhydride, contains from about 2 to about 18, preferably from about 2 to about 8, carbon atoms, and each fatty acid moiety contains from about 8 to about 30, preferably from about 16 to about 20, carbon atoms.
  • such softeners contain from about one to about 3, preferably about 2 fatty acid groups per molecule.
  • the polyhydric alcohol portion of the ester can be ethylene glycol, glycerol, poly (e.g., di-, tri-, tetra, penta-, and/or hexa-) glycerol, xylitol, sucrose, erythritol, pentaerythritol, sorbitol or sorbitan.
  • These nonionic fabric softening materials do not include the ethoxylated sugar derivatives disclosed here ⁇ inbefore. They typically contain no more than about 4 ethoxy groups per molecule.
  • the fatty acid portion of the ester is normally derived from fatty acids having from about 8 to about 30, preferably from about 16 to about 20, carbon atoms. Typical examples of said fatty acids being lauric acid, myristic acid, palmitic acid, . stearic acid, oleic acid, and behenic acid.
  • Highly preferred optional nonionic softening agents for use in the present invention are C ⁇ o-C 2 6 acyl sorbitan esters and polyglycerol monostearate.
  • Sorbitan esters are esterified dehy ⁇ dration products of sorbitol.
  • the preferred sorbitan ester comprises a member selected from the group consisting of C ⁇ o-C 2 6 acyl sorbitan monoesters and C ⁇ o-C 6 acyl sorbitan diesters and ethoxylates of said esters wherein one or more of the unesterified hydroxyl groups in said esters contain from 1 to about 4 oxyethyl- ene units, and mixtures thereof.
  • sorbitan esters containing unsaturation e.g., sorbitan monooleate
  • Sorbitol which is typically prepared by the catalytic hydrogenation of glucose, can be dehydrated in well known fashion to form mixtures of 1,4- and 1,5-sorbitol anhydrides and small amounts of isosorbides. (See U.S. Pat. No. 2,322,821, Brown, issued June 29, 1943, incorporated herein by reference.)
  • sorbitan complex mixtures of anhydrides of sorbitol are collectively referred to herein as "sorbitan.” It will be recognized that this "sorbitan" mixture will also contain some free, uncyclized sorbitol.
  • the preferred sorbitan softening agents of the type employed herein can be prepared by esterifying the "sorbitan" mixture with a fatty acyl group in standard fashion, e.g., by reaction with a fatty acid halide, fatty acid ester, and/or fatty acid.
  • the esterification reaction can occur at any of the available hydroxyl groups, and various mono-, di-, etc., esters can be prepared. In fact, mixtures of mono-, di-, tri-, etc., esters almost always result from such reactions, and the stoichiometric ratios of the reactants can be simply adjusted to favor the desired reaction product.
  • etherification and esterification are generally accomplished in the same processing step by reacting sorbitol directly with fatty acids.
  • Such a method of sorbitan ester preparation is described more fully in MacDonald; "Emulsifiers:” Processing and Quality Control:, Journal of the American Oil Chemists 7 Society. Vol. 45, October 1968.
  • ester mixtures having from 20-50% mono-ester, 25-50% di-ester and 10-35% of tri- and tetra-esters are preferred.
  • sorbitan mono ⁇ ester e.g., monostearate
  • a typical analysis of commercial sorbitan monostearate indicates that it comprises about 27% mono-, 32% di- and 30% tri- and tetra-esters.
  • Commercial sorbitan monostearate therefore is a preferred material.
  • Mixtures of sorbitan stearate and sorbitan palmitate having stearate/palmitate weight ratios varying between 10:1 and 1:10, and 1,5-sorbitan esters are useful. Both the 1,4- and 1,5-sorbitan esters are useful herein.
  • alkyl sorbitan esters for use in the softening compositions herein include sorbitan monolaurate, sorbitan mono- myristate, sorbitan monopalmitate, sorbitan monobehenate, sorbitan monooleate, sorbitan dilaurate, sorbitan dimyristate, sorbitan dipalmitate, sorbitan distearate, sorbitan dibehenate, sorbitan dioleate, and mixtures thereof, and mixed tallowalkyl sorbitan mono- and di-esters.
  • Such mixtures are readily prepared by reacting the foregoing hydroxy-substituted sorbitans, particularly the 1,4- and 1,5-sorbitans, .
  • the preferred sorbitan esters employed herein can contain up to about 15% by weight of esters of the C20 _ 6» an ⁇ : - higher, fatty acids, as well as minor amounts of ZQ , and lower, fatty esters.
  • Glycerol and polyglycerol esters are also preferred herein (e.g., polyglycerol monostearate with a trade name of Radiasurf 7248).
  • Glycerol esters can be prepared from naturally occurring triglycerides by normal extraction, purification and/or interesterification pro ⁇ Des or by esterification processes of the type set forth hereinbefore for sorbitan esters. Partial esters of glycerin can also be ethoxylated with no more than about 4 ethoxy groups per molecule to form usable derivatives that are included within the term "glycerol esters.”
  • Useful glycerol and polyglycerol esters include mono-esters with stearic, oleic, palmitic, lauric, isostearic, myristic, and/or behenic acids and the diesters of stearic, oleic, palmitic, lauric, isostearic, behenic, and/or myristic acids. It is under ⁇ stood that the typical mono-ester contains some di- and tri-ester, etc.
  • The- "glycerol esters” also include the polyglycerol, e.g., diglycerol through octaglycerol esters.
  • the polyglycerol polyols are formed by condensing glycerin or epichlorohydrin together to link the glycerol moieties via ether linkages.
  • the mono- and/or diesters of the polyglycerol polyols are preferred, the fatty acyl groups typically being those described hereinbefore for the sorbitan and glycerol esters.
  • the compositions herein contain from 0% to about 10%, preferably from about 0.1% to about 5%, more preferably from about 0.1% to about 2%, of a soil release agent.
  • such a soil release agent is a polymer.
  • Polymeric soil release agents useful in the present invention include copolymeric blocks of terephthalate and polyethylene oxide or polypropylene oxide, and the like.
  • a preferred soil release agent is a copolymer having blocks of terephthalate and polyethylene oxide. More specifically, these polymers are comprised of repeating units of ethylene and/or propylene terephthalate and polyethylene oxide terephthalate at a molar ratio of ethylene terephthalate units to polyethylene oxide terephthalate units of from about 25:75 to about 35:65, said polyethylene oxide terephthalate containing polyethylene oxide blocks having molecular weights of from about 300 to about 2000. The molecular weight of this polymeric soil release agent is in the range of from about 5,000 to about 55,000.
  • Another preferred polymeric soil release agent is a crystal - lizable polyester with repeat units of ethylene terephthalate units containing from about 10% to about 15% by weight of ethylene terephthalate units together with from about 10% to about 50% by weight of polyoxyethylene terephthalate units, derived from a polyoxyethylene glycol of average molecular weight of from about 300 to about 6,000, and the molar ratio of ethylene terephthalate units to polyoxyethylene terephthalate units in the crystallizable polymeric compound is between 2:1 and* 6:1.
  • this polymer include the commercially available materials Zelcon ® 4780 (from DuPont) and Milease ® T (from ICI).
  • the products herein can also contain from about 0.5% to about 60%, preferably from about 1% to about 50%, cyclodextrin/perfume inclusion complexes, as disclosed in U.S. Pat. Nos. 5,139,687, Borcher et al . , issued Aug. 18, 1992; and 5,234,610, Gardlik et al., to issue Aug. 10, 1993, which are incorporated herein by reference.
  • Perfumes are highly desirable, cart usually benefit from protection, and can be complexed with cyclodextrin.
  • Fabric softening products typically contain perfume to provide an olfac- tory aesthetic benefit and/or to serve as a signal that the product is effective.
  • perfume ingredients and compositions of this invention are the conventional ones known in the art. Selection of any perfume component, or amount of perfume, is based solely on aesthetic considerations. Suitable perfume compounds and compo ⁇ sitions can be found in the art including U.S. Pat. Nos.: 4,145,184, Brain and Cummins, issued Mar. 20, 1979; 4,209,417, Whyte, issued June 24, 1980; 4,515,705, Moeddel , issued May 7, 1985; and 4,152,272, Young, issued May 1, 1979, all of said patents being incorporated herein by reference. Many of the art recognized perfume compositions are relatively substantive, as described hereinafter, to maximize their odor effect on sub ⁇ strates.
  • Solid, dryer-activated fabric conditioning compositions are a uniquely desirable way to apply the cyclodextrins, since they are applied at the very end of a fabric treatment regimen when the fabric is clean and when there are almost no additional treatments that can remove the cyclodextrin.
  • Stabilizers can be present in the compositions of the present invention.
  • the term "stabilizer,” as. used herein, includes antioxidants and reductive agents. These agents are present at a level of from 0% to about 2%, preferably from about 0.01% to about 0.2%, more preferably from about 0.05% to about 0.1% for antioxi ⁇ dants and more preferably from about 0.01% to about 0.2% for reductive agents. These assure good odor stability under long term storage conditions for the compositions. Use of antioxidants and reductive agent stabilizers is especially critical for unscented or low scent products (no or low perfume)..
  • antioxidants that can be added to the compo- sitions of this invention include ascorbic acid, ascorbic pal ⁇ mitate, propyl gallate, available from Eastman Chemical Products, Inc., under the trade names Tenox® PG and Tenox S-l; a mixture of BHT, BHA, propyl gallate, and citric acid, available from Eastman Chemical Products, Inc., under the trade name Tenox-6; butylated hydroxytoluene, available from UOP Process Division under the trade name Sustane ® BHT; tertiary butylhydroquinone, Eastman Chemical Products, Inc., as Tenox TBHQ; natural tocopherols, Eastman Chemical Products, Inc., as Tenox GT-l/GT-2; and butylated hydroxyanisole, Eastman Chemical Products, Inc., as BHA.
  • reductive agents include sodium borohydride, hypophosphorous acid, and mixtures thereof.
  • hydrophobic groups such as fatty acids from, e.g., tallow, possess odors that remain with the compound, e.g., DEQA despite the chemical and mechanical processing steps which convert the raw tallow to finished DEQA.
  • sources must be deodorized. e.g., by absorption, distillation (including stripping such as steam stripping), etc., as is well known in the art.
  • the present invention can include other optional components (minor components) conventionally used in textile treatment compositions, for example, colorants, preservatives, optical brighteners, opacifiers, physical stabilizers such as guar gum and polyethylene glycol, anti-shrinkage agents, anti-wrinkle agents, fabric crisping agents, spotting agents, germicides, fungicides, anti-corrosion agents, antifoam agents, and the like.
  • dyes for example, colorants, preservatives, optical brighteners, opacifiers, physical stabilizers such as guar gum and polyethylene glycol, anti-shrinkage agents, anti-wrinkle agents, fabric crisping agents, spotting agents, germicides, fungicides, anti-corrosion agents, antifoam agents, and the like.
  • the present invention relates to articles of manufacture comprising a substrate that has been modified to provide superior feel and acceptability after use.
  • Representative articles and their components are those that are adapted to soften fabrics in an automatic laundry dryer, including the ones disclosed in U.S. Pat. Nos.: 3,989,631 Marsan, issued Nov. 2, 1976; 4,055,248, Marsan, issued Oct. 25, 1977; 4,073,996, Bedenk et al . , issued Feb. 14, 1978; 4,022,938, Zaki et al., issued May 10, 1977; 4,764,289, Trinh, issued Aug. 16, 1988; 4,808,086, Evans et al . , issued Feb. 28,1989; 4,103,047, Zaki et al . , issued July 25, 1978; 3,736,668, Dillarstone, issued June 5, 1973; 3,7C 202, Compa et al .
  • the fabric treatment compositions are provided as an article of manufacture in combination with the flexible substrate as described hereinafter.
  • the substrates herein effectively release the composition (A) in an automatic laundry (clothes) dryer.
  • the substrate dispensing means will normally carry an effec- tive amount of fabric treatment composition.
  • Such effective amount typically provides sufficient fabric conditioning/anti ⁇ static agent and/or anionic polymeric soil release agent for at least one treatment of a minimum load in an automatic laundry dryer.
  • Amounts of fabric treatment composition for multiple uses, e.g., up to about 30, can be used.
  • Typical amounts for a single article can vary from about 0.25 g to about 100 g, preferably from about 0.5 g to about 20 g, most preferably from about 1 g to about 10 g.
  • the substrates useful herein are polyester non-woven fabrics having basis weights of from about 0.52 oz/yd 2 to about 0.58 oz/yd 2 , preferably from about 0.53 oz/yd 2 to about 0.57 oz/yd 2 , more preferably from about 0.54 oz/yd 2 to about 0.56 oz/yd 2 .
  • These substrates are prepared using polyester fibers having deniers of from about 2 to about 6, preferably from about 3 to about 5, and more preferably about 4.
  • the fiber is a continuous filament that is laid down, in a pattern that results in a multiplicity of layers and intersections between overlayed portions of the filament, on a belt, preferably foraminous, and then the fiber intersections are fused into fiber-to-fiber bonds by a combination of heat and pressure, typically a temperature of about 237 ⁇ C and a roll pressure of about 40 lbs/sq-in.
  • the conditions can be varied, but are adjusted to provide at least a 14% ncrease in thickness, more preferably at least a 29% increase in thickness, from about 0.14 mm for the standard con ⁇ ditions, to at least about 0.16 mm, more preferably at least about 0.18 mm.
  • the fuzziness as rated by a panel on a scale of from 1 to 5, where 1 is high fuzz, improves from about 4 to about 2.9 on the outside (non-belt or "jet" side where the air jets are located) and from about 4.4 to about 1.9 on the belt side of the substrate.
  • the typical polyester substrate used heretofore is significantly less soft after use than a rayon substrate whereas the polyester substrates herein, especially those formed with lower temperature and lower pressure are not significantly less soft than a commercial rayon substrate.
  • the breaking strengths remain at least about 3 lbs/sq-in in each direction. I.e., from about 3 to about 14, preferably from about 6 to about 12, more preferably from about 7 to about 9, lbs/sq-in.
  • These substrates are fabricated from polyester fibers having a denier from about 2 to about 6, prefer- ably from about 3 to about 5, more preferably about 4.
  • the fabrics are typically prepared by laying a thin layer of fiber on a moving fora inous belt and then applying heat to melt at least a portion of the surfaces of the fibers and applying heat to fuse the adjacent fibers to each other at their intersections. The amount of heat and pressure is adjusted to provide the desired bonding.
  • the articles of this invention can be used for imparting the fabric treatment composition to fabric (clothes) to provide softening and/or antistatic effects to fabric in an automatic laundry dryer.
  • the method of using the articles of the present invention comprises: commingling pieces of damp fabric by tumbling said fabric under heat in an automatic clothes dryer with an article comprising an effective amount of composition.(A) .
  • the composition should have a melting point greater than about 35 ⁇ C be flowable at dryer operating temperature.
  • the present invention relates to improved solid dryer-acti ⁇ vated fabric softener articles which have improved acceptability to the consumer. All percentages, ratios, and parts herein, in the Specifi ⁇ cation, Examples, and Claims, are by weight and are approximations unless otherwise stated.
  • the substrate was prepared in a conventional manner with the only changes being in the bonding temperature (from about 237 ⁇ C to about 235 ⁇ C) and the consolidating pressures (from about 40 psig to about 0 psig for the nip roll and from about 10 psig to about 4.5 psig for the consolidation roll steam pressure).
  • the sub ⁇ strate prepared by the conventional process compares to the improved substrate as follows: Fuzz rating (1 to 5 grade with 1 being most preferred) Jet Fuzz 4.0 vs. 2.9 and Belt side Fuzz 4.4 vs. 1.9; Tearing tensile strength (lbs/in) cross direction 3.3 vs. 5.7 and machine direction 3.7 vs. 4.5; Softness vs.
  • the coating mixture is applied to the said improved substrate sheets (22.86 cm. by 22.86 cm., about 523 sq.cm. having a weight of about 1 gm)
  • the substrate sheets are comprised of about 4-denier spun bonded polyester.
  • the molten fabric conditioning composition is applied with an impregnation head and drawn between two heated rollers to impregnate the substrate and remove excess composition.
  • the softener composition is applied in an amount of about 2.38 gm per sheet. When the sheets (articles) are used by consumers, they are preferred for softness as compared to sheets prepared with existing substrates and are not significantly different from prior art rayon substrate articles.

Abstract

L'invention concerne des articles pour le traitement du linge, activés dans le sèche-linge et comprenant un substrat en polyester filé-lié plus doux au toucher que les substrats traditionnels en polyester et/ou pratiquement aussi doux au toucher que les substrats traditionnels en rayonne, après utilisation dans un sèche-linge automatique. Ces articles sont constitués par: (A) au moins 5 % environ de composition de traitement pour le linge comprenant une matière active pour le traitement du linge; et (B) un substrat en non-tissé de polyester préparé à partir d'une fibre de polyester ayant un denier de 2 environ à 6 environ, ledit substrat ayant un poids dans la plage de 0,52 once/yard2 environ à 0,58 once/yard2 environ, une épaisseur de 0,16 mm environ à 0,22 mm environ et, de préférence, une résistance à la déchirure d'au moins 3 livres/pouce2 aussi bien dans la direction transversale que dans la direction machine ou encore mieux de 4 livres/pouce2 environ à 7 livres/pouce2 environ dans la direction transversale et de 3,1 pouces/livre2 environ à 6 livres/pouce2 environ dans la direction machine, ledit polyester étant aussi doux ou plus doux au toucher que les substrats traditionnels de ce type, après que ledit article ait été utilisé dans ledit sèche-linge automatique et après que la composition pour le traitement du linge ait été enlevée pratiquement en totalité dudit substrat.
EP94927998A 1993-09-10 1994-09-01 Articles pour le traitement de linge, actives dans le seche-linge et comprenant un substrat en polyester doux au toucher Ceased EP0717772A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US12014593A 1993-09-10 1993-09-10
US120145 1993-09-10
PCT/US1994/009939 WO1995007342A1 (fr) 1993-09-10 1994-09-01 Articles pour le traitement de linge, actives dans le seche-linge et comprenant un substrat en polyester doux au toucher

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EP0717772A1 true EP0717772A1 (fr) 1996-06-26

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EP (1) EP0717772A1 (fr)
JP (1) JPH09502369A (fr)
CA (1) CA2171287A1 (fr)
WO (1) WO1995007342A1 (fr)

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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
US5883069A (en) * 1996-05-02 1999-03-16 The Procter & Gamble Company Dryer-activated fabric conditioning articles with improved substrate
US20040092192A1 (en) * 2002-11-07 2004-05-13 Reemay, Inc. Hollow fiber nonwoven sheet for fabric softener substrate
US7977303B2 (en) * 2004-02-27 2011-07-12 The Procter & Gamble Company Multiple use fabric conditioning block with indentations
KR101426635B1 (ko) * 2010-04-01 2014-08-05 에보니크 데구사 게엠베하 섬유 유연제 활성 조성물
WO2013103629A1 (fr) * 2012-01-04 2013-07-11 The Procter & Gamble Company Structures fibreuses contenant des principes actifs et présentant de multiples zones
CN104039945B (zh) * 2012-01-04 2017-03-15 宝洁公司 具有不同密度的多个区域的含活性物质纤维结构

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US4139477A (en) * 1978-03-16 1979-02-13 E. I. Du Pont De Nemours And Company Fabric conditioning compositions
EP0007135B1 (fr) * 1978-07-17 1983-04-13 THE PROCTER & GAMBLE COMPANY Articles et méthodes pour le traitement de tissus
DE3003249A1 (de) * 1980-01-30 1981-08-06 Henkel KGaA, 4000 Düsseldorf Mittel zum nachbehandeln gewaschener waesche in einem waeschetrockner
US4733774A (en) * 1987-01-16 1988-03-29 The Procter & Gamble Company Glue patterned substrate for pouched particulate fabric softener laundry product
US4830904A (en) * 1987-11-06 1989-05-16 James River Corporation Porous thermoformable heat sealable nonwoven fabric
DE3818013A1 (de) * 1988-05-27 1989-11-30 Henkel Kgaa Gewebeweichmachungsmittel

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JPH09502369A (ja) 1997-03-11
WO1995007342A1 (fr) 1995-03-16
CA2171287A1 (fr) 1995-03-16

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