EP1085916A1 - Parties centrales absorbant l'eau pour articles absorbant l'eau - Google Patents

Parties centrales absorbant l'eau pour articles absorbant l'eau

Info

Publication number
EP1085916A1
EP1085916A1 EP99931042A EP99931042A EP1085916A1 EP 1085916 A1 EP1085916 A1 EP 1085916A1 EP 99931042 A EP99931042 A EP 99931042A EP 99931042 A EP99931042 A EP 99931042A EP 1085916 A1 EP1085916 A1 EP 1085916A1
Authority
EP
European Patent Office
Prior art keywords
water
pads
absorbent
powder
groups
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.)
Withdrawn
Application number
EP99931042A
Other languages
German (de)
English (en)
Inventor
Ian Cheyne
Mark Tetz
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.)
Camelot Technologies Ltd
Camelot Superabsorbents BV
Original Assignee
Camelot Technologies Ltd
Camelot Superabsorbents BV
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 Camelot Technologies Ltd, Camelot Superabsorbents BV filed Critical Camelot Technologies Ltd
Publication of EP1085916A1 publication Critical patent/EP1085916A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/24—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof
    • 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
    • A61L15/60—Liquid-swellable gel-forming materials, e.g. super-absorbents
    • 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
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • 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
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
    • A61F2013/530583—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the form
    • 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
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
    • A61F2013/530583—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the form
    • A61F2013/530613—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the form in fibres

Definitions

  • the present invention relates to absorbent articles.
  • it relates to absorbent articles such as disposable diapers, sanitary napkins, pads and incontinence garments.
  • the present invention relates to a water-absorbent core for an absorbent article.
  • water when used alone or in the phrases “water- absorbing”, “water-absorbent”, “water-swellable” and “water-management” is understood to mean not only water but also aqueous media such as, in particular, electrolyte solutions such as body fluids.
  • Absorbent articles such as sanitary napkins, pads, incontinence garments and disposable diapers have been known for many years and much effort has been made to improve the functional efficiency of such articles to make them more absorbent, more comfortable to wear and less obtrusive to the wearer.
  • such products have a core which includes a water- absorbent layer.
  • This water-absorbent layer may be formed from any suitable water-absorbent material including wood pulp, rayon and tissue. These water-absorbent materials commonly have an absorbency of about lOg per gram of water. It will be understood that the absorbency values are different for saline and other such solutions.
  • compositions may be in any suitable form including powders, particles and fibers.
  • the fibrous copolymers are rendered hydrophilic and water-swellable by reaction with ammonia or an alkali metal hydroxide.
  • US 3,980,663 which is incorporated herein by reference, describes water-swellable absorbent articles made from carboxylic polyelectrolytes via cross-linking with glycerine diglycidyl ether.
  • European Published Application No. 0 268 498 (incorporated herein by reference) describes a water-absorbent composition formed by causing a substantially linear polymer of water-soluble ethylenically unsaturated monomer blends comprising carboxylic and hydroxylic monomers to cross-link internally.
  • superabsorbent polymer compositions are those produced from a copolymer of an ⁇ , ⁇ unsaturated monomer having at least one pendant unit selected from a carboxylic acid group and derivatives thereof and a copolymerisable monomer. A proportion of the pendant units are present in the final copolymer as the free acid and a proportion as the salt of the acid.
  • These copolymers are capable of being cross-linked, either internally or with a variety of cross-linking agents, to form the water-swellable composition.
  • water-swellable compositions of this type can be found in US 4,616,063, 4,705,773, 4,731,067, 4,743,244, 4,788,237, 4,813,945, 4,880,868 and 4,892,533 and EP 0 272 074, 0 264 208 and 0436 514 which are incorporated herein by reference.
  • carboxylic acid groups include carboxylic acid salt groups, carboxylic acid amide groups, carboxylic acid imide groups, carboxylic acid anhydride groups and carboxylic acid ester groups.
  • water-absorbent polymers can be found in US 4,798,861, WO 93/17066, WO 93/255735, WO 93/24684, WO 93/12275, European Published Application Nos 0 401 044, 0 269 393, 0 326 382, 0 227 305, 0 101 253, 0 213 799, 0 232 121, 0 342 919, 0 233 014, 0 268 498 and 0 397 410, British Patent Application Nos 2 082 614, 2 022 505, 2 270 030, 2 269 602 and 2 126 591, U.S. Patent Nos 4,418,163, 4,418,163, 3,989,586, 4,332,917, 4,338,417, 4,420,588 and
  • Superabsorbent materials of the kinds referred to in the above-mentioned patents and applications may be in any suitable form including powder, particulate, granular and fibers; the fibers may be straight or may be curled and/or crimped. Details of such curly/crimped fibers may be found in US 4,822,453, 4,888,453 5,462,793 and 4,898,462 which are incorporated herein by reference.
  • water-absorbent materials may be included in the water-absorbent core. Suitable materials include naturally occurring water-absorbent materials. One such water-absorbent material is starchy material such as that proposed by the US
  • Peat moss may also be used a water- absorbent material.
  • Alginates have also been proposed as suitable water-absorbent material.
  • One example of the use of such alginates is that suggested by Beghin/Kayserberg.
  • Rewet is a measure of how dry the article comprising the water-absorbent core feels to the touch after water- absorption. This is generally measured under a load of approximately 3-5kPa. Rewet is of particular importance in the applications to which the absorbent articles of the present invention are directed as if the article feels damp, the user will feel damp and uncomfortable.
  • the problem of rewet is particularly acute where the water-absorbent layer is formed from or includes the superabsorbent polymers described above, in particular where it is formed from particularly fast absorbing superabsorbent polymers.
  • the superabsorbent polymers described above can absorb a large volume of water and absorption can take place in a short time period, in some circumstances the superabsorbent polymer may become locally saturated because of the fast absorbency of the superabsorbent material and may thereby feel damp to the touch.
  • the core comprises superabsorbent polymeric material in powder or particulate form and superabsorbent polymeric material in fibrous form.
  • fibrous form includes material in the form of fibres and material in the form of filaments.
  • a core for use in an absorbent article wherein the core comprises (a) superabsorbent polymeric material in powder, particulate or powder and particulate form and (b) superabsorbent polymeric material in fibrous form.
  • the superabsorbent polymeric material in powder, particulate or powder and particulate form and the superabsorbent polymer material in fibrous form may be formed from the same superabsorbent polymeric material or they may be formed from different superabsorbent polymeric material.
  • the superabsorbent material in fibrous form will have a higher rate of absorbency, commonly in the range of 50g to lOOg per gram or even higher, than the superabsorbent polymeric material in powder, particulate or powder and particulate form, whose rate of absorbency may be, for example, about lOg per gram.
  • the superabsorbent material in fibrous form which has the higher rate of absorbency, will absorb the greatest volume of the water and some of the superabsorbent material in powder, particulate or powder and particulate form will not absorb an appreciable amount of water due to its lower rate of absorbency.
  • the core is then put under pressure, for example by the movement of the user of the absorbent article, water may be expelled from the fibers.
  • the superabsorbent material in the core instead of the water being expelled from the core towards its upper surface it will be absorbed by the superabsorbent material in the core which did not become saturated during the initial insult of water, ie. the superabsorbent material in powder, particulate or powder and particulate form.
  • an absorbent article including the core of the above first aspect.
  • the water-absorbent core may be of non-uniform configuration.
  • the absorbent article is a feminine hygiene product or a diaper
  • the water-absorbent core may be shaped such that it is thicker in the crotch region.
  • the absorbent layer Whatever material is used for the absorbent layer, it is generally backed by a fluid- impervious backing sheet to protect clothing and the surrounding area from soiling and to prevent leakage of the body fluid which would cause embarrassment to the user. Any suitable water-impervious backing material may be used.
  • the article generally has a water-permeable non-woven type cover-sheet which defines the surface of the article which will, in use, be in contact with the user.
  • the cover sheet is intended to insulate the wearer from contact with water that has been absorbed into the core, thus the cover sheet should allow water to pass through it into the core but remain dry and soft to the touch.
  • Any suitable material may be used as the cover-sheet.
  • a suitable cover-sheet is described in US 5,257,982 which is incorporated herein by reference.
  • the core may additionally include a distribution layer which is generally located above the water-absorbent layer.
  • This distribution layer serves to wick the water away from the point of initial contact with the article and transport it to other parts of the water- absorbent layer.
  • the use of a distribution layer of this type is advantageous in addressing the problem of pooling if a substantial volume of water is discharged in a short time and thereby gives the user a feeling of dryness.
  • Examples of distribution layers include those described in EP 0 565 606, GB 2 266 465 and GB 2 278 371 which are incorporated herein by reference.
  • distribution layers are generally made of hydrophilic material.
  • the concept of speeding up the rate at which water is transported in the plane of the distribution layer is discussed in detail in EP 0 565 606 assigned to The Procter & Gamble Company in which the distribution layer forms part of the multiple layer absorbent core.
  • the article may additionally or alternatively include a water-management layer of the kind described in International Patent Application No. PCT/EP96/03530 which is incorporated herein by reference.
  • an absorbent article comprising a liquid pervious cover sheet, a liquid impervious backsheet and a core described in the above second aspect wherein the cover sheet is joined to the backsheet to enclose the core.
  • a water-absorbing article comprises a water-absorbent core.
  • the water-absorbent core may be of any suitable arrangement and will generally comprise, for example, bulking material such as wood fluff. Low level water-absorbent material such as wood pulp, rayon, tissue and the like may additionally be present.
  • the core will additionally include superabsorbent material. From 1 to 99 % (of total superabsorbent material) by weight of this superabsorbent material is in particulate and/or powder form and from 99 to 1 % by weight of the superabsorbent material is in fibrous form.
  • the superabsorbent material is in particulate and/or powder form and from 90 to 10 % by weight of the superabsorbent material is in fibrous form.
  • the total of superabsorbent material will comprise about one third material in powder, particulate or powder and particulate form and two thirds in fibrous form.
  • the particles of superabsorbent material are preferably in the size range 100-300 ⁇ m.
  • the fibrous superabsorbent is preferably sized to have a denier of approximately 10 to 30, a cross-sectional diameter of approximately 10 to lOO ⁇ m and a length of approximately 6mm to 150mm, more preferably about 50mm.
  • any suitable superabsorbent material may be used to form the superabsorbent material in powder, particulate or fibrous form. Examples of some suitable polymers are detailed above.
  • the superabsorbent material is preferably based on a copolymer having (a) repeating units derived from an , ⁇ - unsaturated monomer and containing pendant carboxylic groups and (b) repeating units of a monomer copolymerisable with the ⁇ ,j8-unsaturated monomer.
  • a proportion of the pendant carboxylic groups are free carboxylic acid (-COOH) groups and a proportion are carboxylic acid salt groups.
  • the ⁇ ,j3-unsaturated monomer from which the copolymer is formed may be a monomer containing pendant groups selected from carboxylic acid groups and derivatives thereof.
  • suitable derivatives of carboxylic acid groups include carboxylic acid salt groups, carboxylic acid amide groups, carboxylic acid imide groups, carboxylic acid anhydride groups and carboxylic acid ester groups.
  • Suitable ⁇ , ⁇ unsaturated monomers having at least one pendant unit selected from a carboxylic acid group and derivatives thereof include maleic anhydride; crotonic acid; fumaric acid; mesaconic acid; the sodium salt of maleic acid; the sodium salt of 2-methyl, 2-butene dicarboxylic acid; the sodium salt of itaconic acid; maleamic acid; maleamide; N-phenyl maleimide; maleimide; maleic anhydride; fumaric anhydride; itaconic anhydride; citraconic anhydride; mesaconic anhydride; methyl itaconic anhydride; ethyl maleic anhydride; diethylmaleate; methylmaleate and their mixtures.
  • Suitable copolymer izable comonomer can be employed.
  • Suitable copolymerizable comonomers include alkenes, eg. ethylene, propylene and isobutylene, C, to C 4 alkyl acrylates and methacrylates, vinyl esters such as vinyl acetate, vinyl ethers such as methyl vinyl ether and isobutyl vinyl ether, and styrenic compounds having the formula:
  • R represents hydrogen or an alkyl group having from 1 to 6 carbon atoms and wherein the benzene ring may be substituted.
  • Suitable substituents include low molecular weight alkyl groups or hydroxy groups.
  • Suitable C, to C 4 alkyl acrylates include methyl acrylate, ethyl acrylate, isopropyl aery late, n-propyl acrylate, n-butyl acrylate and the like and their mixtures.
  • Suitable to C 4 alkyl methacrylates include methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, n-propylmethacrylate, n-butyl methacrylate, and the like, and their mixtures.
  • Suitable styrenic compounds include styrene, ⁇ -methylstyrene, p-methylstyrene, t- butyl styrene and their mixtures.
  • Any suitable free radical polymerization catalyst can be used to catalyze the copolymerization reaction.
  • Suitable catalysts include benzoyl peroxide, such as that sold under the trade name PERKADOX and the VAZO azobisisobutyronitrile catalysts which are commercially available from E. I. DuPont de Nemours.
  • NAZO- 64 and NAZO-67 catalysts are suitable for use in this invention at amounts of from about 0.2 to about 2 mole percent or greater based on the amount of ⁇ , ⁇ unsaturated monomer such as maleic anhydride.
  • the pendant unit or units on the ⁇ ,/3-unsaturated monomer employed in the copolymerisation will determine what, if any, additional reactions must be carried out to obtain the desired copolymer in which a proportion of the pendant units are present as the free acid and a proportion are present as the salt of the acid.
  • the ⁇ ,/3-unsaturated monomer bears only carboxylic acid amide, carboxylic acid imide, carboxylic acid anhydride, carboxylic acid ester groups, or mixtures thereof, it is necessary to convert at least a portion of these carboxylic acid derivative groups to carboxylic acid groups by, for example, an hydrolysis reaction. If the ⁇ ,j(3-unsaturated monomer bears only carboxylic acid salt groups, partial acidification to form carboxylic acid groups will be necessary.
  • the copolymer after such treatment if any, preferably comprises from about 20 to about 80 wt% pendant carboxylic acid groups and from about 80 to about 20 wt% pendant carboxylate salts.
  • One copolymer that is particularly suitable for use in the production of the superabsorbent composition is a copolymer of maleic anhydride and isobutylene. Another suitable copolymer is that of maleic anhydride and styrene copolymer. Suitable copolymers will preferably have peak molecular weights of from about 5,000 to about 500,000 or more.
  • Suitable copolymers of maleic anhydride and isobutylene can be prepared using any suitable conventional method. Such copolymers are also commercially available from
  • ISOBAM ISOBAM copolymers are available in several grades which are differentiated by viscosity molecular weight: ISOBAM-10, 160,000 to 170,000; ISOBAM-06, 80,000 to 90,000; ISOBAM-04, 55,000 to 65,000; and ISOBAM-600, 6,000 to 10,000.
  • the copolymer of maleic anhydride and isobutylene may suitably be reacted with a controlled amount of alkali to convert the anhydride groups to a mixture of free carboxylic acid groups and carboxylic acid salt groups.
  • the copolymer containing pendant carboxylic acid groups and pendant carboxylic acid salt groups may be combined with a cross-linking agent having two or more groups, for example hydroxyl or heterocyclic carbonate groups, reactive with functional groups on the polymer chain.
  • the copolymer may crosslink intramolecularly in the absence of an external cross-linking agent by means of covalent or hydrogen bonds.
  • the copolymer (and crosslinking agent, if present) is provided in the form of a syrup.
  • the copolymer After the copolymer has been prepared, but typically before it is cured, but in some instances as it is curing, it is processed into any desired form using conventional methods of fabrication. For example, it can be subjected to casting; spray drying; air-assisted spray drying; air attenuation; or wet, dry or flash spinning.
  • the copolymer is provided in the form of a syrup from which fibre is obtained by spinning.
  • the syrup may include crosslinking agent where desired and crosslinking may occur during or after spirming to form superabsorbent fibre or filament.

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Hematology (AREA)
  • Public Health (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Materials For Medical Uses (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

L'invention concerne des parties centrales absorbant l'eau pour articles absorbant l'eau, et qui contiennent une matière polymère superabsorbante présentant un pouvoir accru d'absorption et des propriétés réduites de remouillage si la matière est prévue en partie sous forme de poudre, de particules ou de poudre et de particules, et en partie sous forme de fibres. L'invention concerne également des articles absorbant l'eau qui contiennent lesdites parties centrales.
EP99931042A 1998-06-09 1999-06-08 Parties centrales absorbant l'eau pour articles absorbant l'eau Withdrawn EP1085916A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9812427.4A GB9812427D0 (en) 1998-06-09 1998-06-09 Absorbent articles
GB9812427 1998-06-09
PCT/EP1999/003934 WO1999064084A1 (fr) 1998-06-09 1999-06-08 Parties centrales absorbant l'eau pour articles absorbant l'eau

Publications (1)

Publication Number Publication Date
EP1085916A1 true EP1085916A1 (fr) 2001-03-28

Family

ID=10833477

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99931042A Withdrawn EP1085916A1 (fr) 1998-06-09 1999-06-08 Parties centrales absorbant l'eau pour articles absorbant l'eau

Country Status (6)

Country Link
EP (1) EP1085916A1 (fr)
JP (1) JP2002517562A (fr)
AU (1) AU4770899A (fr)
CA (1) CA2334494A1 (fr)
GB (1) GB9812427D0 (fr)
WO (1) WO1999064084A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5496201B2 (ja) * 2008-08-06 2014-05-21 ビーエーエスエフ ソシエタス・ヨーロピア 流体吸収性物品

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4788237A (en) * 1986-12-15 1988-11-29 Arco Chemical Company Sugar-containing water-absorbing composition which facilitates fiber formation
GB2269602A (en) * 1992-08-13 1994-02-16 Courtaulds Plc Absorbent nonwoven fabric
WO1997015258A2 (fr) * 1995-10-24 1997-05-01 Camelot Superabsorbents Limited Articles absorbants
JP3383497B2 (ja) * 1995-11-30 2003-03-04 ユニ・チャーム株式会社 使い捨ての体液吸収性着用物品

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9964084A1 *

Also Published As

Publication number Publication date
AU4770899A (en) 1999-12-30
JP2002517562A (ja) 2002-06-18
CA2334494A1 (fr) 1999-12-16
GB9812427D0 (en) 1998-08-05
WO1999064084A1 (fr) 1999-12-16

Similar Documents

Publication Publication Date Title
US7183360B2 (en) Method for crosslinking hydrogels with morpholine-2,3-diones
KR100335554B1 (ko) 항균코팅된 하이드로겔 형성 흡수성 중합체
US5453323A (en) Superabsorbent polymer having improved absorbency properties
US7132479B2 (en) Polymer mixtures with improved odor control
US20020082575A1 (en) Absorbent articles
US4813945A (en) Ultrahigh water-absorbing fiber forming composition
JP2014014818A (ja) 吸水性樹脂を主成分とする粒子状吸水剤、その製造方法及び吸収性物品
US20210298962A1 (en) Feminine hygiene absorbent article
JP3466318B2 (ja) 吸水剤組成物およびその製法、並びにこれら吸水剤組成物を含有する吸収物品
JP2005334616A (ja) 吸収体およびそれが用いられた吸収性物品
AU2004277362C1 (en) Absorbent article comprising an absorbent structure
WO1999064084A1 (fr) Parties centrales absorbant l'eau pour articles absorbant l'eau
EP0956385A1 (fr) Procede servant a lier une bande de fibres
JP3145334B2 (ja) 吸液剤、吸収性物品およびそれらの製造方法
GB2315221A (en) Absorbent Articles
WO1997005839A1 (fr) Article absorbant contenant des fibres absorbantes et non absorbantes
WO1996033680A1 (fr) Article absorbant
GB2315220A (en) Absorbent Article
JPH10337305A (ja) 吸収体及び吸収性物品
JP2000083996A (ja) 吸収性物品
MXPA96004168A (en) Member of acquisition and distribution of absorbe nucleus fluids

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010105

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE CH DE DK FI FR GB IE IT LI NL SE

17Q First examination report despatched

Effective date: 20011015

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

RIC1 Information provided on ipc code assigned before grant

Free format text: 7A 61L 15/60 A, 7A 61L 15/24 B

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20030320