WO2005067886A1 - Matieres absorbantes d'odeurs - Google Patents

Matieres absorbantes d'odeurs Download PDF

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Publication number
WO2005067886A1
WO2005067886A1 PCT/EP2004/000347 EP2004000347W WO2005067886A1 WO 2005067886 A1 WO2005067886 A1 WO 2005067886A1 EP 2004000347 W EP2004000347 W EP 2004000347W WO 2005067886 A1 WO2005067886 A1 WO 2005067886A1
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Prior art keywords
odour
materials
weight
absorbent material
odour absorbent
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PCT/EP2004/000347
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English (en)
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WO2005067886A8 (fr
Inventor
Joachim Haselbach
Georg Bernhard Werner
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Ekotec Industrietechnik Gmbh
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Priority to DE112004002657T priority Critical patent/DE112004002657T5/de
Priority to PCT/EP2004/000347 priority patent/WO2005067886A1/fr
Publication of WO2005067886A1 publication Critical patent/WO2005067886A1/fr
Publication of WO2005067886A8 publication Critical patent/WO2005067886A8/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/49—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds
    • A61K8/494—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with more than one nitrogen as the only hetero atom
    • A61K8/4953—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with more than one nitrogen as the only hetero atom containing pyrimidine ring derivatives, e.g. minoxidil
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/49—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds
    • A61K8/4973—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with oxygen as the only hetero atom
    • A61K8/498—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with oxygen as the only hetero atom having 6-membered rings or their condensed derivatives, e.g. coumarin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/96—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution
    • A61K8/97—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution from algae, fungi, lichens or plants; from derivatives thereof
    • A61K8/9783—Angiosperms [Magnoliophyta]
    • A61K8/9789—Magnoliopsida [dicotyledons]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q15/00—Anti-perspirants or body deodorants

Definitions

  • the present invention relates to odour absorbing materials, i.e. materials that can reduce malodorous smells, in particular for use with hygienic articles and materials used therein, such as absorbent and/or superabsorbent materials or other web materials.
  • Malodour is a long lasting problem for centuries, and refers generally to non- dangerous substances (or substances which are at least at a non- dangerous concentration), which, however, are considered to be unpleasant, embarrassing, or objectionable.
  • "odour control” can be used. This refers generally to odour absorption, i.e. the removal of (mal-)odorous components, and/or to the prevention of creation or origination thereof. Odour control may also include addition of smelling agents, such as masking perfumes or perfumes as such.
  • odour is a subjective human perception
  • odour control is mostly relevant in the human environment. Whilst industrial applications (so with regard to emissions or exhausts) are well known, odour control is mostly performed and reported in or for the human environment, such as household cleaning, personal hygiene, or relating to animal created odours like pet litter, manure treatment and the like.
  • odour absorption materials As odour is often transmitted by gaseous molecules, removal of such molecules from the air has frequently been addressed by odour absorption materials. This can be achieved by solid materials exhibiting a large surface area, such as by having internal pores and the tendency to adsorb the odorous components on the surface. Examples for such materials are charcoal, zeolites, bentonites, cationic polysaccharides (Chitosan), and the like, such as described in EP-A-0510619 [Majors], US Pat. 5306487 [Karapasha], WO 91/11977 [Furio], WO 81/01643 [Dodwell], or WO 96/06589 [Schoene]. Odorous components can also be removed by liquids, as used in scrubbing, or by applying bromo-chemicals in a liquid form, or cyclodextrines, such as described in US Pat. 5429628 [Trinh].
  • Odour absorption can also be achieved by chemical reaction with the odorous components so as to chemically bind these or to degrade these into components having a more acceptable smell.
  • Such approaches include chelating agents, such as amino carboxylates (see US Pat. 4356190 [Kraskin]) or buffer systems such as using citric acid and sodium bicarbonate (see e.g. WO 94/25077 [Guarracino]).
  • Odour reducing materials may well be combines with masking agents or perfumes are, such as described for zeolites in WO 94/22500 [Trinh].
  • odour absorbent ingredients with materials designed to have a different functionality, such as liquid absorbing ingredients, such as in the context of a cleaning agent for surgeries in combination with superabsorbent material with certain herbal extracts containing relatively low molecular weight chemicals so as to absorb e.g. blood (see US Pat. 5595731 [Valuers].
  • extract of e.g. green tea is disclosed as an additive to foamed shoe insoles.
  • superabsorbent materials with additives intended for odour reduction in absorbent articles are on the market such as from ATOFINA, France, (using bromides as additives), Nippon Shokubai, Japan, (using camellia sinensis [i.e.
  • a first object of the present invention is to provide a particularly effective odour absorbent material, which is versatile, in particular by being able to absorb various odorous components and by being applicable in a hydrophilic form.
  • the material should further be efficient, in particular by providing high concentration of highly effective compounds and by being readily commercially available.
  • the material should further prevent or reduce the generation of malodour by micro organisms. Even further, the material should preferably be safe when being used in the human environment by being non-toxic and by having no pharmacological effect.
  • This object is achieved by providing a material, which comprises hydrophilic parts of plants or hydrophilic extracts thereof, whereby the plant is selected from the group of olive, vine, or pine plants.
  • a hydrophilic odour absorbent material which comprises polyphenolic compounds selected from the group consisting of (A) flavonoids, preferably (A1) flavanoles, and more preferably (A1a) catechin, (A1b) epicatechin, (A1c) epigallocatechin, (Aid) epicatechingallate, (A1e) epigallocatechingallate, (A2) flavonoles, preferably (A2a) Anthocyanidin, (A2b) Proanthocyanidin, and (B) oleuropeins, wherein the content of the polyphenolic compounds (A) is at least 60 weight-%, preferably at least 70 weight-%, more preferably at least 80 weight-% of the odour control material, of the polyphenolic compound (B) is preferably at least about 15 weight-%, or which comprises less than about 4 weight-%, preferably less than about 1 weight-% of pharmacologically active ingredients, such as caffeine, all percentage
  • a second object of the present invention is to combine suitable odour absorbent materials with other materials which are designed to perform a function different from odour absorbency, such as liquid handling materials - in particular absorbent or superabsorbent materials - or web materials, such as for sealing, cover or for performing another mechanical functions.
  • suitable odour absorbent materials such as liquid handling materials - in particular absorbent or superabsorbent materials - or web materials, such as for sealing, cover or for performing another mechanical functions.
  • liquid handling materials in particular absorbent or superabsorbent materials - or web materials, such as for sealing, cover or for performing another mechanical functions.
  • odour absorbent materials are hydrophilic rather than being hydrophobic, such as being oily or in an oily phase.
  • the odour absorbent material is combined with superabsorbent material.
  • a third object of the present invention is to provide hygienic articles such as baby diapers, adult incontinence articles, feminine hygiene articles and the like comprising materials of the first or second object.
  • hygienic articles such as baby diapers, adult incontinence articles, feminine hygiene articles and the like comprising materials of the first or second object.
  • such articles exhibit "breathability", or may further comprise perfume.
  • odour absorption which is often synonymously used with odour reduction, refers to mechanisms to reduce the impact of malodorous smells, which are generally perceived by human beings to be unpleasant, embarrassing, objectionable, or obnoxious. As such, it includes adsorption of gaseous molecules on the external or internal surface of solids, or the adsorption into liquids.
  • odour control is meant to include the mechanisms of odour absorption but also the prevention of generation of odorous smells and further other mechanisms, such as the chemical reaction such as decomposition so as to create non- or less odorous compounds, or the masking of malodours by more consciously perceived smells, such as by applying perfumes.
  • Odorous components which are transmitted to the nose through the air as carrier can be removed from the air either at the source where they are generated or emitted from, or in the proximity of the nose of the wearer (e.g. face masks). These components can be removed by physical or chemical treatment. If these components are in the gas phase, these can be "caught” by solid surfaces (adsorption) or in liquids (scrubbing). If the odorous components are contained in solid particles or liquid droplets, their level can be reduced by trapping, or filtering and the like of the particles or droplet. A second factor in odour control relates to minimizing the generation of malodorous components.
  • perfume refers to additives, which release a particular, generally agreeably scent.
  • scent can be released only upon certain conditions, such as temperature, pressure, liquid contact, and the like.
  • Odour absorbent materials Odour absorbent materials should satisfy a number of requirements and properties. As an important aspect, the material should be effective in adsorbing odour of various components. The effectiveness thus relates to the breadth of functionality across various odorous components. Henceforth, an effective material should be able to reduce odours such as emanating from urine, faeces, sweat, menses and so on.
  • TMA Trimethylamine
  • odour absorbent agents on the basis of cyclodextrin rely on the mechanism of capturing the odorous molecules in the centre of the cyclodextrin molecule, thereby being quite specific as to the size of the odorous molecules. If the molecules are smaller or bigger than the space in the cyclodextrin molecule, these are much less effective.
  • the effectiveness of odour absorbent materials can also be increased, if the materials function by several mechanisms of odour reduction, such as by combining clathration with covalent or ionic chemical bonding.
  • the odour absorption materials should also be efficient, which within the context of the present invention is intended to reflect good odour absorbency properties relative to the amount of material employed. This is partly linked to the effectiveness as discussed hereinabove, as for example a material like cyclodextrin being predominantly effective for a particular molecular size will retain odorous components of a different size either not at all or to a much lesser extent by secondary effects, such as weak bonding to the outer parts of the cyclodextrin molecule. But this aspect of efficiency depends strongly on the concentration of particularly effective compounds in a carrier material if the odour absorbent material is not a pure compound. This aspect is particularly important for the group of natural based materials, as these are generally not chemically "pure” compounds. For example, it is known, that green tea leaves contain quite effective compounds, namely polyphenols such as epigallocatechingallates, typically around 50 weight-% (dry matter basis of leaves), and generally less than 60 weight-%.
  • odour absorbent materials In addition to the odour absorbing properties, it is often preferred, that odour absorbent materials have other odour controlling functionality, especially the prevention of generation of malodorous substances. As such substances often emanate from the activity of micro-organisms, it can be preferred, that odour absorbency materials also exhibit anti-microbial activity. Antimicrobial activity can be assessed by many tools and methods, in the context of the present invention it refers to the commonly known methods as published in the "Pharmacopoeiae European" (Ph.Eur.), 4 th Edition, with a loading ratio of 1 :100.
  • the respective tests should be carried out with micro-organisms like Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and should have bacteria level lower than the threshold level both after 48 hrs and 7 days.
  • micro-organisms like Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and should have bacteria level lower than the threshold level both after 48 hrs and 7 days.
  • fungicidal effects can be evaluated using the same method, using Candida albican, or Asperigillus niger. Further antimicrobial effects can also aim at inactivation, binding, or denaturising of proteins or enzymes.
  • odour absorbent materials are generally used in the human environment, they should be safe for humans as well as the environment. It is generally accepted, that for certain materials there exist "unsafe" concentration levels (i.e. a degree of exposure to humans, which is generally acknowledged to be unacceptable), but that below such levels there can be a "less is better” concentration region (i.e. a region where there may be impacts to human beings, albeit to an acceptable degree), or a "no effect” region. Of course, the distinction between the individual regions and in particular between the latter two is often disputable. Whilst this applies in general to various toxic effects, it is also relevant for pharmacological effects or physiological effects of compounds when these are administered to humans such as orally, respiratory, or cutaneously.
  • pharmacological effects may be desired, such as in the case of medicinal compounds, but often it is preferred that no pharmacological effects are induced.
  • a component which can have a pharmacological effect is caffeine, as contained in coffee or tea plants as well as in extracts produced there form, and impacting the human cardiac system upon oral but also upon cutaneous application.
  • odour absorption materials are often used in combination with other materials, a further requirement relates to their impact on the functionality of these other materials.
  • a particular class of such functional materials can be liquid absorbent materials, designed to pick up and often to retain liquids. Often, such liquids are on an aqueous basis, such as most human exudates like urine, sweat, or menses.
  • the odour absorbent materials are hydrophilic.
  • suitable compounds can be prepared by aqueous extractions, optionally including extraction aids like ethanol.
  • the extracts can be left in the liquid form, optionally being concentrated by removal of water such as by evaporation, preferably under gentle conditions, reverse osmosis and the like.
  • organic materials such as leaves, can be used "as is” which means generally in dried and ground form.
  • dry refers to materials having a dry touch and not more than 20 weight-% water or moisture, preferably less than 10 weight-% or even being "essentially dry” with less than about 1 weight-% moisture.
  • composition is generally expressed "on a dry basis", referring to a waterless basis, such as can be determined by using a desiccator, or gentle heating, such as oven drying at 110° C for 3 hours. For natural derived materials, drying at even lower temperatures may be preferable.
  • odour absorbent materials these should preferably be available in sufficient quantities. If such materials are based on naturally occurring ingredients - such as plants - the functional odour absorbing compounds are generally not in a pure form. However for economic reasons, it may often be desirable to use the most effective compounds of natural based materials in a pure form. "Pure” refers in this context to a mixture, wherein more than 50 weight-% , preferably more than 80 weight-%, more preferably more than 90 weight-% represent functional odour absorbent compounds. These functional compounds can be one type of chemical molecule, or can be more than one, if all of these are functional as odour absorbent material.
  • the term pure includes also "essentially free of other substances" such as when a chemical compound has only traces of “impurities”, such as when the "other substances” represent not more than about 5 weight-%, preferably not more than 1 weight-%), often even not more than 1 part per million (ppm), all percentages on a dry basis.
  • Materials or compounds, which are useful in the context of the present invention may also have other functionalities making them suitable for other applications not being considered in the present context, such as pharmaceutical applications, uses in foodstuff or drinks for oral administration, or topical applications, such as in cosmetics.
  • Specific odour absorbent materials Whilst a number of materials may satisfy one or some of the requirements described hereinabove, there has now been identified a particular group of materials which satisfy most if not all thereof. In particular, there have been identified certain plants having particularly high concentrations of suitable chemical compounds, in particular olives (Oleae folia - Oleo europaea), vine (esp. vitis vinfera), or pine trees (esp.
  • the present invention relates to hydrophilic parts or hydrophilic extracts from parts of these plants as odour absorbent materials.
  • These plants, respectively the parts thereof, have in common, that they have a relatively high concentration of certain compounds which function particularly effective as odour absorbent material, and which belong to the group of polyphenols.
  • such compounds are also referred to as tannins, but more specifically, the particularly useful compounds belong to the chemicals respectively families of chemicals of flavonoids, especially flavanoles (Flavan-3-ol), such as catechin, epicatechin, epigallocatechin, epicatechingallate, epigallocatechingallate, or flavonoles (Flavon-3-ol) such as (pro-)Anthocyanidin; or Oleuropeins.
  • flavon-3-ol such as catechin, epicatechin, epigallocatechin, epicatechingallate, epigallocatechingallate, or flavonoles
  • flavon-3-ol flavonoles
  • such compounds exhibit molecular weights in excess of about 200 Dalton, often more than about 400 Dalton.
  • odour absorbent materials comprising high amounts of the mentioned characteristic chemical compounds, namely at least 60 weight-%, on a dry basis, for the flavonoids, or preferably at least 15% for the oleuropeins.
  • the odour absorbing material may be a pure material, consisting of at least 80 weight-%, more preferably at least 90 weight-% of one or more of the flavonoids or oleuropeins.
  • the odour absorbent material can be "essentially free of other substances".
  • Suitable materials are commercially available as food additive from Frutarom AG, Wadenswil, Switzerland, under the designation Vitis vinif. fol. extra.a.siccum, article no. 0085945 (Vine leaves extract) having a polyphenol content of up to 60 weight-% or Oleae europ. fol. extr.s.siccum, art no. 0085947 (olive leave extract), having a oleuropein content of at least 18%.
  • a method to gain suitable extracts from grapes having a high polyphenol content by employing solid chromatographic extraction is disclosed in US Pat. 6238673 [Howard], which is incorporated herein by reference.
  • a preferred form of these materials is a fine powder, having an average particle diameter of between 50 ⁇ m and 200 ⁇ m, as can be determined by conventional methods such as gentle sieving. When added as a dry powder, it is preferred, that the content of particles having less than about 45 ⁇ m be minimized to avoid undesirable dusting, preferably having less than 5 weight-% thereof.
  • these flavonoids or oleuropeins exhibit particular beneficial as well as synergistic functionality in the context of odour absorbency.
  • the particular chemical structure of carbon-ring systems allows interaction with similar systems, in particular hydrophobic bonding, such as with skatol (3- methylindol), generally known as being present in faecal smells.
  • cyclodextrin a cyclodextrin molecule includes one odour molecule of a specific size.
  • the compounds deactivate respectively denaturise proteins and enzymes, and cell membranes, and thus exhibit good anti-microbial activity.
  • the above mentioned materials according to the present invention and in particular the plant materials respectively the extracts thereof are preferably essentially free of pharmacologically active compounds, in contrast, for example, to green tea extracts containing significant amounts of caffeine, which is known to exhibit cardiologic effects.
  • green tea extracts containing significant amounts of caffeine which is known to exhibit cardiologic effects.
  • caffeine which is known to exhibit cardiologic effects.
  • An particular approach to modify conventional green tea extracts for pharmaceutical, nutritional, or cosmetic applications has been disclosed in US Pat. 6210679 [Bailey], incorporated herein by reference, wherein the caffeine content of the green tea is reduced, and the catechin content increased.
  • the present invention relates to hygienic applications, like the materials useful for cleaning surgeries (as referred to in the background section hereinbefore), but also to hygienic packaging such as of foodstuff, such as generally described in WO 98/01299 [Jonas], which is incorporated herein by reference.
  • This aspect relates particularly to hygienic articles.
  • "hygienic article” refers to articles which are placed against, or in the proximity of the body of the wearer, preferably be in direct contact with the skin of a wearer, often but not necessarily a human.
  • Hygienic articles can be fluid absorbent, so that body fluids, or exudates are picked up by the hygienic article itself.
  • body fluids or “body exudates” includes, but is not limited to, urine, blood, vaginal discharges, sweat and faecal matters.
  • absorbent hygienic articles may include diapers, training pants, adult incontinence undergarments, feminine hygiene products, breast pads, shoe insoles, underarm sweat pads, stoma bags, bandages, dressings, wipes, bibs, surgical drapes, surgical gowns, and the like.
  • Hygienic articles can also be non-absorbent, for example when an absorbent pad is hold in place on the wearer by a hygienic pant, for example a stretch net pant.
  • Hygienic articles can be "disposable", i.e. not intended to be laundered or otherwise reused or restored as an hygienic article, i.e., after use, it is intended that they are discarded or recycled, composted or otherwise disposed of in an environmentally compatible manner.
  • Modern hygienic articles can have quite complex designs; see for example the abundance of art relating to the production of baby diapers.
  • Preferred diaper configurations are described generally in U.S. Pat. No. 3860003; U.S. Pat. No. 5151092, U.S. Pat. No. 5221274; and U.S. Pat. No. 5554145; U.S. Pat. No. 5569234, each of which is incorporated herein by reference.
  • Hygienic applications and odour absorbing materials are described generally in U.S. Pat. No. 3860003; U.S. Pat. No. 5151092, U.S. Pat. No. 5221274; and U.S. Pat. No. 5554145
  • odour absorbing materials according to the present invention in hygienic area is particularly beneficial when the materials are not only capable of absorbing odours of various sources, such as urine, faeces, blood, or sweat, but also have a anti-microbial activity in reducing or even preventing the decomposition of the compounds of the exudates to mal-odorous components.
  • the odour absorbent materials can be distributed throughout the article, or they may be applied only to specific regions thereof. In a specific design, the "loading region", i.e.
  • the region of the article whereupon the exudates are deposited is essentially free of odour absorbent material, as such materials may be reduced in their odour absorbency if they are overloaded by the discharged liquids.
  • the odour absorbent materials may be located within the regions of high airflow out of the article.
  • the odour absorbent materials may be located in the region of the so-called back-sheets, which are supposed to prevent wetting of the outer garments of the wearer, or top- or coversheets, which represent generally the user oriented surface of the article, or regions in the proximity of the waist- and leg openings of the article during use.
  • odour absorbency becomes particularly beneficial for so-called breathable articles, i.e. hygiene articles which allow aeration of the skin of the wearer covered by the article.
  • breathable articles i.e. hygiene articles which allow aeration of the skin of the wearer covered by the article.
  • the consequence of this aeration in or of such articles is often, that also odorous components can be transferred to the environment.
  • odour absorbent materials are applied to or in such breathable hygienic articles.
  • breathability is achieved by materials, which allow air to permeate through, or by allowing convective air flow through the article itself or through the gap between the article and the wearer.
  • the materials according to the present invention are particularly suitable when having essentially no pharmacological effect, as tampons are often used for prolonged periods in direct contact with sensitive body tissue.
  • pharmacologically active compounds such as caffeine as being present for example in green tea extracts, could transfer to the tissue of the wearer.
  • Odour absorbent materials according to the present invention can also advantageously be applied in the context of other uses with presence of blood, such as wound dressings as described in US Appl. 2001/0026810 [McGhee], or compounds used for cleaning surgeries as described in US Pat.
  • Odour absorbent materials may advantageously be combined with other materials designed for a different functionality than odour absorbency.
  • the odour absorbent material preferably does not deteriorate the performance of the other material beyond the "dilution effect".
  • Such other functionality can be a sealing or cover function, or another mechanical function, as can be achieved by materials generally referred to as "webs".
  • Web materials can be film like webs, such as a plastic film, optionally with apertures and/or openings, nets, or scrims or textile webs, such as nonwoven materials, or woven or knitted webs, or the like.
  • a nonwoven web has a structure of individual fibres, which are interlaid into a matrix not having an identifiable repeating pattern, and may be formed by a variety of processes known to those skilled in the art, for example, meltblowing, spunbonding, wet-laying, air-laying, and various bonding-carding processes.
  • meltblowing spunbonding
  • wet-laying wet-laying
  • air-laying various bonding-carding processes.
  • paper-like materials i.e. generally wet-laid fibrous structure or dry-laid structures are considered to fall within this description, as long as these include a certain form of bonding so as to exhibit sufficient strength to hold together within the normal use.
  • a preferred embodiment relates to combining odour absorbing materials with materials for acquisition, distribution and preferably retention of fluids, generally aqueous liquids.
  • the liquid can be hold within the materials themselves, such as when liquid is absorbed into cellulosic fibres, or into superabsorbent material, or it can be hold within or flow through the interstices, such as pores within a fibrous batt or a foam.
  • Suitable absorbent fibrous materials include cellulose fibres, in the form of fluff, tissues or paper. Modified cellulose fibres (e.g., stiffened, chemically treated, crosslinked) may also be used.
  • Synthetic fibres may also be used, such as being made of cellulose acetate, acrylics, polyethylene, polypropylene, polyamides, polyesters. Also mixtures of fibres can be used, or bi- or multi-component fibres. Preferably, the fibre surfaces are hydrophilic as such or are treated to be hydrophilic.
  • liquid handling materials can be designed to perform as well acquisition and distribution and retention of the liquids, many modern materials are optimized towards a specific fluid handling functionality, and combined with suitable other materials so as to better cover the complete spectrum of requirements for fluid handling. For example, materials having a more open structure tend to be used for liquid acquisition, which can well be combined with materials having an intermediately open structure, which can be better optimized for liquid distribution.
  • particular liquid retention materials can be used, such as more densely compressed cellulosic structures.
  • a particularly preferred form of liquid retention or liquid absorbent material are superabsorbent materials, which are often referred to as "hydrogels", “absorbent gelling material", “superabsorber”, or “hydrocolloid materials”.
  • Such materials imbibe upon contact with aqueous fluids, such as bodily fluids, such fluids or the water contained therein and form hydrogels.
  • aqueous fluids such as bodily fluids, such fluids or the water contained therein and form hydrogels.
  • These superabsorbent materials are typically capable of absorbing large quantities of aqueous fluids, and further capable of retaining such absorbed fluids under moderate pressures.
  • These superabsorbent materials are typically in the form of discrete, nonfibrous particles. Other forms, such are fibres, foams, sheets, strips, or other macrostructures as being formed from particles, are also suitable for use herein.
  • Suitable superabsorbents in the form of open cell foams may include those disclosed in U.S. Pat. No. 3563243 [Lindquist], U.S. Pat. No. 4554297 [Dabi], U.S.
  • the superabsorbent materials suitable for use herein may comprise a substantially water-insoluble, slightly crosslinked, partially neutralized, polymeric gelling material. This material forms a hydrogel upon contact with water.
  • Suitable superabsorbents include those disclosed in U.S. Pat. No. RE32649 [Brandt] , U.S. Pat. No. 5562646 [Goldman], U.S. Pat. No. 5599335 [Goldman], U.S. Pat. No. 5669894 [Goldman], each of which is incorporated herein by reference.
  • Superabsorbent materials are particularly suited to be used in hygienic articles at high concentrations of superabsorbent within the liquid retaining absorbent core, if they exhibit high Saline Flow Conductivity performance (SFC), preferably of more than 30*10 ⁇ 7 cm 3 sec/g, when evaluated according to the disclosure of U.S. Pat. No. 5599335, and if they are arranged in a homogeneous blend with conventional fluff pulp, at a concentration of more than 50 weight-% superabsorbent, preferably more than 80 weight-% and even more preferably more than 90 weight-% concentration based on the weight of the superabsorbent / cellulose fluff mixture.
  • SFC Saline Flow Conductivity performance
  • Suitable mixtures can further exhibit densities of between 0.1 g/cm 3 and 0.3 g/cm 3 , preferably between 0.15 g/cm 3 and 0.2 g/ cm 3 , all measured under a gentle load of about 1 kPa.
  • the total liquid absorbent capacity of the liquid absorbent materials of a hygienic article should be compatible with the design loading and the intended use of the article, and may be varied in a broad range to accommodate the uses implying low liquid loads up to high loadings.
  • the odour absorbent material may be combined with the other functional materials in any suitable manner and method, which does not significantly deteriorate the properties of the materials, like, for example, excessive heating, or washing with water, or prolonged exposure to moisture.
  • Hydrophilic or aqueous extracts of suitable plants may be spray applied as such, or dried and ground parts of plants may be mixed in conventional dry mixer with bulk materials, such as superabsorbents, or loose fibres. Alternatively, such parts may be dispersed in a slurry, which may be added to the functional material, such as a textile web, or a paper tissue.
  • the amount of odour absorbent material used depends of course on the specific material as well as on the distribution of the material throughout the other material.
  • a particulate odour absorbent material which is distributed homogeneously throughout a bulk material, such as a superabsorbent material, at a level of 0,1 weight-% of dry basis , can provide distinct odour absorbency functionality.
  • the material may be spray applied to a web, such as a non-woven material, followed by gentle drying, at a level of 0.1 weight-%.
  • it may be desirable to apply these at a higher local concentration level of 1 weight-% or more, whereby local concentration level refers to an average concentration in the area or volume to which the odour absorbent material is added.
  • a further preferred embodiment relates to the combination of the odour absorbent materials according to the present invention with perfumes.
  • the odour control materials are preferably positioned closer to the malodour source than the perfume material, wherein closer relates to the following of a path of a odour carrier, such as an air flow.

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Birds (AREA)
  • Engineering & Computer Science (AREA)
  • Biotechnology (AREA)
  • Botany (AREA)
  • Microbiology (AREA)
  • Mycology (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

L'invention concerne une matière absorbante d'odeurs, telle des parties hydrophiles ou des extraits d'olive, de vigne, ou de conifères. Une matière absorbante d'odeurs appropriée peut contenir des composés polyphénoliques, par exemple des flavonoïdes ou des oleuropéines. Ces matières peuvent être combinées avec d'autres, destinées à utiliser en particulier dans des articles d'hygiène.
PCT/EP2004/000347 2004-01-19 2004-01-19 Matieres absorbantes d'odeurs WO2005067886A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE112004002657T DE112004002657T5 (de) 2004-01-19 2004-01-19 Geruchsaabsorbierende Materialien
PCT/EP2004/000347 WO2005067886A1 (fr) 2004-01-19 2004-01-19 Matieres absorbantes d'odeurs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2004/000347 WO2005067886A1 (fr) 2004-01-19 2004-01-19 Matieres absorbantes d'odeurs

Publications (2)

Publication Number Publication Date
WO2005067886A1 true WO2005067886A1 (fr) 2005-07-28
WO2005067886A8 WO2005067886A8 (fr) 2006-01-26

Family

ID=34778253

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PCT/EP2004/000347 WO2005067886A1 (fr) 2004-01-19 2004-01-19 Matieres absorbantes d'odeurs

Country Status (2)

Country Link
DE (1) DE112004002657T5 (fr)
WO (1) WO2005067886A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007045724B4 (de) * 2007-09-24 2012-01-26 Evonik Stockhausen Gmbh Superabsorbierende Zusammensetzung mit Tanninen zur Geruchskontrolle, Verfahren zu deren Herstellung und Verwendung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5107000A (en) * 1990-05-09 1992-04-21 Nestec S. A. Process for obtaining catechin complexes
WO1999044574A1 (fr) * 1998-03-06 1999-09-10 Life Plus International Compositions de pate dentifrice et d'eau dentifrice
EP1013261A1 (fr) * 1998-12-18 2000-06-28 Mitsui & Co., Ltd. Composition pulvérisable pour bain de bouche
US6605296B1 (en) * 1998-03-24 2003-08-12 Numico Research B.V. Natural substances based agent
US20030152656A1 (en) * 2002-02-13 2003-08-14 Pinnell Sheldon R. Olive leaf extraction method and formulations containing olive leaf extract

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5107000A (en) * 1990-05-09 1992-04-21 Nestec S. A. Process for obtaining catechin complexes
WO1999044574A1 (fr) * 1998-03-06 1999-09-10 Life Plus International Compositions de pate dentifrice et d'eau dentifrice
US6605296B1 (en) * 1998-03-24 2003-08-12 Numico Research B.V. Natural substances based agent
EP1013261A1 (fr) * 1998-12-18 2000-06-28 Mitsui & Co., Ltd. Composition pulvérisable pour bain de bouche
US20030152656A1 (en) * 2002-02-13 2003-08-14 Pinnell Sheldon R. Olive leaf extraction method and formulations containing olive leaf extract

Also Published As

Publication number Publication date
DE112004002657T5 (de) 2007-09-27
WO2005067886A8 (fr) 2006-01-26

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