WO1989006142A1 - PRODUIT ABSORBANT AVEC REGULATION DU pH ET PROCEDE DE PREPARATION D'UN TEL PRODUIT - Google Patents

PRODUIT ABSORBANT AVEC REGULATION DU pH ET PROCEDE DE PREPARATION D'UN TEL PRODUIT Download PDF

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Publication number
WO1989006142A1
WO1989006142A1 PCT/GB1989/000013 GB8900013W WO8906142A1 WO 1989006142 A1 WO1989006142 A1 WO 1989006142A1 GB 8900013 W GB8900013 W GB 8900013W WO 8906142 A1 WO8906142 A1 WO 8906142A1
Authority
WO
WIPO (PCT)
Prior art keywords
absorbent material
diaper
incontinent
bedding
urine
Prior art date
Application number
PCT/GB1989/000013
Other languages
English (en)
Inventor
Liam Patrick Forde
Original Assignee
Liam Patrick Forde
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
Priority claimed from GB888800093A external-priority patent/GB8800093D0/en
Priority claimed from GB888812632A external-priority patent/GB8812632D0/en
Application filed by Liam Patrick Forde filed Critical Liam Patrick Forde
Publication of WO1989006142A1 publication Critical patent/WO1989006142A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/84—Accessories, not otherwise provided for, for absorbent pads
    • A61F13/8405—Additives, e.g. for odour, disinfectant or pH control
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/40—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing ingredients of undetermined constitution or reaction products thereof, e.g. plant or animal extracts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/46—Deodorants or malodour counteractants, e.g. to inhibit the formation of ammonia or bacteria
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/84—Accessories, not otherwise provided for, for absorbent pads
    • A61F13/8405—Additives, e.g. for odour, disinfectant or pH control
    • A61F2013/8408—Additives, e.g. for odour, disinfectant or pH control with odour control
    • A61F2013/8411—Additives, e.g. for odour, disinfectant or pH control with odour control in controlling solution Ph
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
    • A61L2300/20—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices containing or releasing organic materials
    • A61L2300/21—Acids
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
    • A61L2300/40—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a specific therapeutic activity or mode of action
    • A61L2300/402—Anaestetics, analgesics, e.g. lidocaine

Definitions

  • This invention relates to diapers, incontinent pads or sheets, and other sanitary products which come in contact with urine or the like, in which undesirable bacteria can grow.
  • absorbent materials such as wood pulp, starches, towelling, absorbent powders and synthetic polymers are used at present to absorb babies' urine and urea of incontinent and incapacited persons in items such as diapers and bed sheets.
  • One-piece disposable diapers comprise, in order, a liquid-permeable or semi-permeable material adapted to be in contact with the skin, a relatively thick absorbent substrate, and an outer layer of an impermeable material, the whole suitably shaped and usually including means for fastening the nappy about the baby's waist.
  • Relatively "old-fashioned" towelling diapers provide an absorbent substrate, and are often used together with, on the inside, a separate layer of a liquid-permeable or semi-permeable material, a separate pair of impermeable pants, and separate fastening means such as a safety pin.
  • the general arrangement of materials is the same in both cases.
  • the absorbent material of which is capable of releasing hydrogen ions to maintain the at of urine in contact, therewith to between 2 and 5.5 for a practicable period
  • the absorbent material itself is now acidic rather than having for example an acidic powder on the surface thereof. Therefore H + ions can be released uniformly throughout the contacting urine mitigating the effect of pH variances. Furthermore final pH of the urine is more predictable and controllable.
  • the invention may further aid in the absorbancy quality of the acidic material.
  • the H + ions are carried by a hydroxyl base, and more preferably the absorbent material is a polymer of glucose.
  • the limits of the desired urine pH are defined by pH value below which the bacteria producing the ammonia cannot, survive (about 5.5 and below); and by the pH value where the acidic urine causes acid burns or otherwise substantially irrates the skin (below about pH2).
  • the invention works in the pH range of 2.5 to 3.
  • the absorbent material could be designed to give most desired urine pH values, such as for example, that required to capture the ammonia.
  • the acidic absorbent material can be admixed with other non-acidic absorbent materials, and naturally acidic or more preferably is substantially an absorbent material which has been protonated since it would not otherwise be suf f iciently acidic .
  • Naturally acidic materials preferably include suitably sterilised sphagnum moss or peat (dead sphagnum moss). Both of these materials are also highly absorbent and sphagnum moss contains phenolic acid which has antiseptic qualities and lanolin which has soothing qualities. It should be noted, however, that sphagnum moss can contain, for example, heavy metals and, the moss should therefore be treated and sterilised to render the moss suitable for use.
  • the natural material such as the sphagnum moss and peat are bleached, which steriles, makes the material more attractive and does not substantially affect its acidic character.
  • the sphagnum moss or peat can be mixed with a relatively neutral material such as wood pulp at, at least 10%, preferably 20% to 30% by weight of the moss or peat.
  • a high degree of pH control can be obtained if an insufficiently acidic absorbent material is protonated.
  • Most absorbent materials in use are polymers of glucose, such as cellulose or starch based materials, and the free hydroxyl groups can act as bases.
  • the degree of protonation and thus final urine pH will depend, for example, on the concentration and time of exposure of the H + ions, as well as the strength of the base.
  • the absorbent material is soaked in an aqueous solution of any suitable acid, of pH for example from 1.8 to 6.5 and preferably from 3.5 to 6.
  • any suitable acid of pH for example from 1.8 to 6.5 and preferably from 3.5 to 6.
  • sulphuric or hydrochloric acid is used.
  • the process of protonating an absorbent material forms a second aspect, of the invention.
  • a process of preparing an acidic absorbent material for a diaper, incontinant bedding or the like comprising protonating an absorbent material capable of taking up hydrogen ions and of maintaining the pH of urine in contact therewith to from 2 to 5.5 for a practicable period.
  • the acidic absorbent material as defined in the first aspect, and made in accordance with the second aspect of the invention forms the third aspect of the present, invention.
  • the invention will now be illustrates by way o f the following examples. Series 1
  • Samples of sphagnum moss and peat were bleacheo. Each of these, and a sample of non-acid wood pulp were then contacted with urine under simulated body conditions and incubated for some time. Two sets of tests were run (see tables I and II) and in each case the sample weight used was 5g and the weight of fresh urine was 27g. In the second run (table II) the results were taken over several days.
  • a typical commercial product i.e. a baby's diaper as sold by a supermarket, was taken and the absorbent infill was removed and. examined.
  • Sample No. 4 pH 6.50 The wood pulp infill was divided into eight equal parts and two parts were used with each of the sample acids.
  • the first of the two portions of wood pulp was completely submerged in the. dilute sulphuric acid f or a period of 30 seconds. It was found that during this 30 seconds the wood pulp soaked up dilute acid and became completely and totally saturated. The second of the two portions of wood pulp was allowed to remain i n the di lu te acid for a period of up to three hours, at which stage it was completely saturated. This was repeated f or each of the other three acid solutions.
  • the reason that the wood pulp became protonated was because starch and cellulose are polyers of glucose.
  • the glucose molecule has three free OH groups.
  • the hydrogen ions from the acid attach themselves to the oxygen if the hydroxyl group forming on ionic compound.
  • the concentration of hydrogen ions in the infill material can be varied by submerging it in different strengths of the dilute acid. By this means, a controlled neutralisation process can be achieved.
  • the last wash of the wood pulp at the wood pulp factory, prior to drying, can be carried out in a dilute acid solution, to suit a diaper manufacturer's requirements.
  • sphagnum is bleached, it can also be protonated if necessary.
  • Infill material from a diaper were protonated and tested as before, but in this instance using hydrochloric acid and using fresh urine 27g or 250ml excreted by a two year old child. A fresh sample of protonated wood pulp weighted 5g.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Public Health (AREA)
  • Epidemiology (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Hematology (AREA)
  • Materials Engineering (AREA)
  • Vascular Medicine (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Botany (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Zoology (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

Dans une couche, le matériau absorbant est acidifère et est capable de libérer des ions H+, afin d'abaisser le pH de l'urine se trouvant en contact avec la couche à un niveau inférieur à celui auquel les bactéries produisant de l'ammoniaque peuvent croître (autour de 5,5). Le matériau peut être naturellement acidifère, tel que de la tourbe ou de la mousse de sphaigne, mais c'est de préférence un matériau absorbant neutre qui est soumis à protonation.
PCT/GB1989/000013 1988-01-05 1989-01-03 PRODUIT ABSORBANT AVEC REGULATION DU pH ET PROCEDE DE PREPARATION D'UN TEL PRODUIT WO1989006142A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8800093 1988-01-05
GB888800093A GB8800093D0 (en) 1988-01-05 1988-01-05 Nappies
GB888812632A GB8812632D0 (en) 1988-05-27 1988-05-27 Sanitary products
GB8812632.1 1988-05-27

Publications (1)

Publication Number Publication Date
WO1989006142A1 true WO1989006142A1 (fr) 1989-07-13

Family

ID=26293264

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1989/000013 WO1989006142A1 (fr) 1988-01-05 1989-01-03 PRODUIT ABSORBANT AVEC REGULATION DU pH ET PROCEDE DE PREPARATION D'UN TEL PRODUIT

Country Status (1)

Country Link
WO (1) WO1989006142A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB140228A (en) * 1919-04-08 1920-03-25 Adam Forman An improved catamenial pad or towel
US3067745A (en) * 1959-08-12 1962-12-11 Johnson & Johnson Absorbent product
US3580253A (en) * 1968-12-09 1971-05-25 Kimberly Clark Co Sanitary napkin and flushable wrapper therefor
DE2448471A1 (de) * 1973-10-15 1975-04-24 Procter & Gamble Wegwerfbandage, insbesondere -windel
US4215692A (en) * 1978-02-21 1980-08-05 Johnson & Johnson Absorbent structure
EP0138178A2 (fr) * 1983-10-14 1985-04-24 Henkel Kommanditgesellschaft auf Aktien Utilisation de matériaux régulateurs de PH dans des articles hygieniques absorbants
EP0138179A2 (fr) * 1983-10-14 1985-04-24 Chemiefaser Lenzing Aktiengesellschaft Matériaux régulateurs de pH et leur préparation
US4685909A (en) * 1985-05-15 1987-08-11 The Procter & Gamble Company Disposable absorbent articles

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB140228A (en) * 1919-04-08 1920-03-25 Adam Forman An improved catamenial pad or towel
US3067745A (en) * 1959-08-12 1962-12-11 Johnson & Johnson Absorbent product
US3580253A (en) * 1968-12-09 1971-05-25 Kimberly Clark Co Sanitary napkin and flushable wrapper therefor
DE2448471A1 (de) * 1973-10-15 1975-04-24 Procter & Gamble Wegwerfbandage, insbesondere -windel
US4215692A (en) * 1978-02-21 1980-08-05 Johnson & Johnson Absorbent structure
EP0138178A2 (fr) * 1983-10-14 1985-04-24 Henkel Kommanditgesellschaft auf Aktien Utilisation de matériaux régulateurs de PH dans des articles hygieniques absorbants
EP0138179A2 (fr) * 1983-10-14 1985-04-24 Chemiefaser Lenzing Aktiengesellschaft Matériaux régulateurs de pH et leur préparation
US4685909A (en) * 1985-05-15 1987-08-11 The Procter & Gamble Company Disposable absorbent articles

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