WO2003073971A2 - Procede de production d'une structure composite absorbante destinee a fabriquer des couches, des serviettes hygieniques et analogues, et structures produits par ce procede - Google Patents

Procede de production d'une structure composite absorbante destinee a fabriquer des couches, des serviettes hygieniques et analogues, et structures produits par ce procede Download PDF

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Publication number
WO2003073971A2
WO2003073971A2 PCT/IT2003/000083 IT0300083W WO03073971A2 WO 2003073971 A2 WO2003073971 A2 WO 2003073971A2 IT 0300083 W IT0300083 W IT 0300083W WO 03073971 A2 WO03073971 A2 WO 03073971A2
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WO
WIPO (PCT)
Prior art keywords
layer
fibers
absorbent
approximately
acquisition
Prior art date
Application number
PCT/IT2003/000083
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English (en)
Other versions
WO2003073971A3 (fr
Inventor
Claudio Giacometti
Original Assignee
Claudio Giacometti
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 Claudio Giacometti filed Critical Claudio Giacometti
Priority to AU2003214639A priority Critical patent/AU2003214639A1/en
Publication of WO2003073971A2 publication Critical patent/WO2003073971A2/fr
Publication of WO2003073971A3 publication Critical patent/WO2003073971A3/fr

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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
    • A61F13/53—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
    • A61F13/534—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 an inhomogeneous composition through the thickness of the pad
    • A61F13/537—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • 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
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
    • A61F13/15658—Forming continuous, e.g. composite, fibrous webs, e.g. involving the application of pulverulent material on parts thereof
    • 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
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15699—Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs
    • 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
    • A61F13/15203—Properties of the article, e.g. stiffness or absorbency
    • A61F2013/15284—Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties
    • A61F2013/15365—Dimensions

Definitions

  • the present invention relates to a composite absorbent structure for producing sanitary articles such as sanitary napkins, diapers for infants, incontinence pads and similar products.
  • the invention also relates to a method for producing a structure of the aforesaid type.
  • a sanitary napkin or a diaper comprises a top sheet which is perforated or at least permeable by fluids in some way, and is designed to come into contact with the body of the wearer.
  • the body fluids (blood, urine) to be absorbed by the product pass through the top sheet and reach the interior of the product.
  • the top sheet typically consists of a perforated plastic film and/or a layer of non-woven fabric, or possibly composite multilayer structures, for example one or more plastic films joined to one or more strips or webs of textile fibers.
  • ADL acquisition and distribution layer
  • the acquisition and distribution layer causes the body fluids to pass rapidly into the interior of the structure of the absorbent, and distributes them in such a way that they are distributed uniformly throughout the thickness of the underlying storage layer or core, instead of being absorbed in a localized way only in the areas underlying the arrival points of the fluid, or predominantly in these areas.
  • a further problem which arises in the manufacture of absorbent products of the aforementioned type consists in the overall dimensions of the products themselves.
  • composite materials which consist of two or more assembled layers, producing a structure forming an initial intermediate product to be used for making the finished product.
  • US-A-4287251 describes a disposable absorbent structure formed by a plurality of layers of non-woven fabric, of the entangled type for example. These layers are joined together by a bonding agent, applied in particular along the edges, or by spot welding, using thermoplastic fibers.
  • WO-A-9963922 describes an absorbent structure comprising a composite acquisition and distribution layer for the body fluids and one or more absorbent layers.
  • the various layers are formed by the air-laid method, in other words by depositing a web of short fibers on a cloth through which passes a flow of air sucked from the side of the cloth opposite that on which the fibers are deposited.
  • the absorbent layer consists of cellulose fibers, super-absorbent polymer particles and a bonding agent for consolidating the web.
  • the super-absorbent polymer particles are mixed with the fibers before deposition on the forming cloth.
  • the bonding agent is sprayed on to the web of fibers formed on the forming cloth and is then polymerized by passing the intermediate product through one or more kilns.
  • the webs forming the acquisition and distribution layer are also formed by the air-laid method and are consolidated by the addition of a bonding agent which is thermally polymerized.
  • the webs are consolidated by fusion of thermoplastic fibers present in the mixtures used for forming the webs.
  • the different layers are joined together in a similar way, by means of hot-cross-linked bonding agents or by the partial fusion of the thermoplastic fibers.
  • US-A-5,695,486 describes a composite absorbent structure formed by air-laid methods, in which the webs are consolidated by the addition of bonding agents.
  • the formation of non-woven layers by air-laid methods has the advantage of enabling particles of a super-absorbent polymer (SAP) to be introduced and mixed intimately with the fibers before the formation of the web.
  • SAP super-absorbent polymer
  • Super-absorbent polymers enable the fluid absorption capacity of the absorbent layer to be increased considerably.
  • this method also has some drawbacks, including the complexity of the plant required for this type of production and the necessity of using bonding agents for consolidating and joining the fibers to form a layer having sufficient mechanical consistency.
  • the methods of consolidating the fibers are a critical aspect, particularly in view of the fact that the fibers used for forming the webs by the air-laid method are very short.
  • the finished product has a relatively low mechanical strength which is a disadvantage in the subsequent stages of conversion of the intermediate product for the manufacture of the finished product.
  • the use of randomly oriented short fibers gives rise to another problem, in the form of the non-optimal distribution of the fluids in the absorbent layer. This is because the body fluids are released in a rather limited area on the top sheet of the absorbent product. From here they pass into the underlying absorbent layer of a product whose longitudinal dimension is greater than the transverse dimension.
  • EP-B-0168196 describes a different method of distributing particles or powders of a super-absorbent polymer in a web product for the production of sanitary napkins.
  • the particles are deposited on the top sheet of a web and a second web is applied on top of them.
  • the two webs are joined by embossing, so that the particles remain trapped between the two webs.
  • the resulting structure has a low mechanical strength, which is a disadvantage at the stage of using the multilayer absorbent structure in sanitary napkin or diaper production lines.
  • the object of the present invention is to provide a continuous sheet material which at least partially overcomes one or more of the drawbacks of the conventional products.
  • the object of the present invention is to provide a method which makes it possible to obtain, with low production costs, absorbent structures having high mechanical strength and high absorption, which can be advantageously used as intermediate products in the manufacture of sanitary napkins, diapers for infants, incontinence pads, and the like.
  • Another object of the present invention is to provide a composite multilayer structure of high strength for the aforesaid applications.
  • a method or process for producing a composite absorbent strip material, comprising at least a first layer for acquisition and distribution of a fluid and a second absorbent layer for absorbing and storing said fluid, in which at least a first card web, consisting at least partially of absorbent fibers, is combined with a supporting non-woven fabric and with said acquisition and distribution layer, particles of at least one super-absorbent polymer being inserted into said composite strip material.
  • the combination of the acquisition and distribution layer with the absorbent core and with the supporting non-woven fabric makes it possible to obtain an intermediate product with a high absorption capacity, having reduced thickness and high strength, which drastically simplifies the converting operations by which this intermediate product is formed into the finished product.
  • the process of manufacturing the intermediate product is also simple, and can be carried out by machinery which is not complicated and which is therefore inexpensive and easy to maintain.
  • the method can comprise the following steps: placing particles of at least one super-absorbent polymer between a first card web and a second card web formed at least partially from absorbent fibers, and forming an absorbent core comprising said first and second card web and the polymer particles interposed between them; combining a supporting non-woven fabric with a first side of said core; combining the acquisition and distribution layer with a second side of said core; joining together: the acquisition and distribution layer; the first and second webs which, with the super-absorbent polymer particles, form said core; and the supporting non-woven fabric.
  • the absorbent core has an even higher absorption capacity and the super-absorbent polymer particles are retained in a reliable way within the structure, so that a uniform distribution is maintained.
  • the mechanical strength of the material is increased by the use of two carded fiber webs, which, when consolidated, impart mechanical strength to the product.
  • the type of materials used also makes it possible to obtain high fluid absorption capacities with very thin products, with consequent advantages in production, packaging and transport, but above all with advantages of greater comfort for the user.
  • the fibers forming the card web or webs can be what are known as staple fibers, in other words fibers with a length in the range from 15 to 60 mm and preferably from 30 to 60 mm, both for the webs forming the core and for the web forming the acquisition and distribution layer.
  • the super-absorbent polymer particles can be powders, flocks, granules, or other types.
  • the super-absorbent polymer that is used can be any polymer specified for the manufacture of absorbent products, for example one of the polymers listed in EP-A-0168196.
  • this web can also be a multiple web, in other words one produced by superimposition of a plurality of layers of carded fibers which may also originate from a plurality of carding machines in series. These layers form a structure of adequate thickness and will be subsequently consolidated to form a single non-woven layer.
  • the first card web can be placed, in other words superimposed, on the supporting non-woven fabric, while the following are then placed in sequence on the free surface of the first card web: the super-absorbent polymer particles, the second card web, and the acquisition and distribution layer.
  • the acquisition and distribution layer, the card web or webs with the super-absorbent polymer particles (interposed between the above or between the card web and one of the adjacent non-woven and acquisition and distribution layers), and the supporting non-woven fabric can be joined together in various ways.
  • this joining is achieved by a hot working process, for example by calendering, in other words by passing the composite structure resulting from the superimposition of the various components through a nip between two rolls, at least one of which is heated and at least one of which can be provided with protuberances.
  • the temperature of the roll or rolls and the speed of advance of the material between the rolls are advantageously kept at levels such as to cause at least a partial melting of at least one of the components of the fiber mixture, for example of the part with a lower melting point of any bi-component fibers used in the mixtures, or of any suitable heat- sensitive component.
  • heat-sensitive denotes in a general way a component, particularly a fiber, which melts at the temperature at which the various layers forming the structure are consolidated, to impart cohesion.
  • the partial and spot melting at the positions of the protuberances of the roll results in spot welding between the different layers forming the structure.
  • the low-melting or heat-sensitive components of the different layers can be melted by blowing hot air on to the material.
  • the different webs or layers are welded together in another way, by an ultrasonic welding process.
  • the shape and distribution of the welding areas can be selected appropriately in order to retain the super-absorbent polymer particles so that they will retain the most uniform distribution possible within the absorbent core.
  • a heat-sensitive component When the different component layers of the absorbent layer are joined together by a thermal method (by calendering, by hot air, by ultrasound, or by another method), a heat-sensitive component must be provided in the mixture of fibers used to form at least the card web or webs forming part of the absorbent core.
  • the heat that melts the component consolidates the card web or webs and also produces a mutual adhesion between them and the supporting non-woven fabric and the acquisition and distribution layer.
  • the acquisition and distribution layer is made from an initial card web produced in line and placed directly on top of the web or webs forming the absorbent core, the layer must contain a heat-sensitive component in order to achieve the consolidation of its component fibers.
  • the acquisition and distribution layer is essentially non- absorbent, it consists predominantly of heat-sensitive fibers.
  • the supporting non-woven fabric can be made without heat-sensitive components; for example, it can consist entirely of natural fibers.
  • the adhesion to the card web adjacent to it is brought about by the melting of the heat-sensitive fibers present in the card web itself.
  • the supporting non-woven fabric will be a non-woven fabric which is consolidated, for example, by a mechanical method (needling). It is, however, preferable for the supporting non-woven fabric to consist wholly or partially of heat-sensitive fibers and to be consolidated by a thermal method, being, for example, what is called a thermobonded textile.
  • the various component layers and webs of the composite structure can be joined by an entangling or needling process.
  • the acquisition and distribution layer can consist of a card web which is produced in line and is directly placed on the card web or webs forming the absorbent core, and is therefore consolidated during the stage at which the various layers forming the absorbent structure are joined together (by needling, by a thermal method or in another way).
  • it consists, in turn, of a non-woven fabric produced previously and suitably consolidated.
  • it can be a non-woven fabric consisting of one or more card webs which have been needled or consolidated by other known methods, by heat for example (thermobonded).
  • the acquisition and distribution layer can consist of a single web of consolidated fibers, a plurality of identical webs of consolidated fibers, or two or more layers or webs joined together and formed from fibers of different kinds and/or with different physical characteristics, to facilitate the acquisition and distribution functions respectively.
  • the acquisition and distribution layer preferably consists for the most part of essentially non-absorbent fibers.
  • non- absorbent fibers made from one or more of the following materials: polyester; polyethylene; polypropylene; bi-component polyethylene and polypropylene fibers; bi-component polyamide and polyester fibers; and bi-component polyester and polyethylene fibers.
  • Fibers of absorbent material such as viscose, cellulose and cotton, can be used in combination with the preceding fibers, preferably in smaller quantities.
  • the non-absorbent fibers can be hydrophilic or hydrophobic.
  • the fibers of this layer have, for example, a count in the range from 1 to 15 dtex, and preferably from 3 to 10 dtex.
  • the card webs forming the absorbent core consist predominantly of absorbent fibers.
  • the webs forming the core also comprise fibers of heat-sensitive materials, in other words thermoplastic fibers.
  • These webs can generally comprise fibers formed from one or more of the following materials: viscose, cellulose, cotton as absorbent materials; polypropylene, bi- component polyethylene and polypropylene fibers; bi-component polyethylene and polyester fibers; and bi-component polyamide and polyester fibers.
  • the fibers of these webs have, for example, a count in the range from 1 to 15 dtex, and preferably from 1 to 2 dtex.
  • these can consist of mixtures of fibers which are different from each other.
  • the acquisition and distribution layer is advantageously formed from fibers oriented with a preferential distribution parallel to the direction of the longitudinal extension of said strip material.
  • one or both of the webs forming the absorbent core consist of fibers oriented in the longitudinal direction of the material. Since the final absorbent product has an elongated structure, and since a portion of the strip material cut parallel to the direction of the machine, in other words parallel to the longitudinal direction of the material, is inserted into it, the orientation of the fibers in this direction provides an optimal exploitation of the whole absorbent structure.
  • the acquisition and distribution layer advantageously has a thickness in the range from 0.15 to 3 mm and a weight per unit of surface area approximately in the range from 10 to 80 g/m 2 .
  • the absorbent core advantageously has a thickness in the range from 0.2 to 3 mm for example, and a weight per unit of surface area in the range from 20 to 200 g/m 2 , excluding the weight of the super-absorbent polymer.
  • the percentage of the latter can be in the range from approximately 5% to approximately 70% of the weight of fiber forming the absorbent core.
  • Fig. 1 shows a diagram of an installation for applying the method of the present invention in a first embodiment
  • Fig. 2 shows a diagram of an installation for applying the method of the present invention in a second embodiment
  • Fig. 3 shows an enlarged and highly schematic local cross section of the structure according to the invention in a possible embodiment. Detailed description of the preferred embodiments of the invention
  • Fig. 1 shows schematically a first embodiment of an installation for the application of the method according to the invention.
  • the installation comprises a first carding machine 1 and a second carding machine 3, which produce corresponding card webs indicated as V1 and V3.
  • the card web V1 which is not consolidated, in other words not made cohesive, is deposited so that its lower surface lies on a first layer of non-woven fabric NT1 , supplied from a first reel R1 which is gradually unwound.
  • NT1 can consist of a layer of non-woven fabric produced by the consolidation of a card web or a different type of non-woven fabric, for example one made cohesive by the use of adhesives or by partial melting of thermoplastic fibers contained in the mixture of fibers forming the non-woven fabric.
  • a suitable quantity of particles P of one or more super-absorbent polymers supplied from a hopper 5 is deposited on the upper surface of the web V1 , opposite the surface in contact with the layer of non-woven fabric NT1.
  • a quantity of particles forming a proportion by weight of 5- 70% of the total weight of the webs V1 and V2 can be distributed.
  • the web V3 produced by the carding machine 3 is deposited on the web V1 down line from the area of application of the super-absorbent polymer particles P, in such a way that these particles remain contained between the two webs V1 and V3.
  • the two webs V1 and V3 and the layer of super- absorbent polymer particles P are designed to form the absorbent core of the structure.
  • a non-woven fabric NT2 unwound from a second reei R2 forms the layer for acquisition and distribution of the fluids, and is deposited on the upper surface of the web V3.
  • the non-woven fabric NT2 can consist of a consolidated card web or another non-woven fabric having suitable characteristics.
  • the assembly of the webs V1 , V3, the particles P retained between them and the non-woven fabrics NT1 , NT2 is then passed through a calender 9, which in the illustrated example comprises a plain roll 11 and a roll 13 provided with protuberances.
  • the two rolls are pressed against each other and one or both of the rolls are heated to a sufficient temperature to melt at least one of the thermoplastic fibers forming the various superimposed layers, to achieve the mutual welding.
  • the composite material obtained in this way is wound onto a reel R3 for subsequent use in a production line for absorbent articles or products.
  • the composite material will form the inner part of the sanitary napkin or diaper. A portion of this material, suitably shaped, will be enclosed between two shells forming the fluid-permeable top sheet and the impermeable back sheet.
  • Other layers or components can then be added to complete the structure of the final product, as required by the producer.
  • NT1 , NT2, V1 and V3 can also be joined together by a different joining method.
  • they can be spot welded, possibly by an ultrasonic system of a known type.
  • a needling system can be used, with a needling plate in place of the calender 9.
  • a solution using a joining system of this type is shown in Fig. 2.
  • a third card web V4 supplied from a third carding machine 4 is provided in place of the non-woven fabric NT2 and forms the acquisition and distribution layer.
  • the assembly formed by the non-woven fabric NT1 and the three unconsolidated card webs V1 , V3 and V4 with the super-absorbent polymer particles P enclosed between the webs V1 and V3 is passed through a needling station 15, with a needling plate 17.
  • the needling consolidates the card webs and joins together the various layers making up the multilayer structure, which is then wound to form a reel R3.
  • Fig. 3 shows schematically an enlarged local cross section through the end product.
  • the absorbent core or layer consists of the components NT1 , V1 , V3 and P, while the acquisition and distribution layer consists of the non- woven fabric NT2 in the example of Fig. 1 and consists of the web V4 in the example of Fig. 2.
  • the super-absorbent polymer particles P could be deposited directly on the supporting non-woven fabric NT1 before the web V1 is deposited on the latter.
  • the particles could be deposited on the web V3 and could then be placed between the latter and the acquisition and distribution layer NT2, although this would not be particularly advantageous, since it is preferable to interpose a layer of absorbent fibers between the super-absorbent polymer particles and the acquisition and distribution layer.
  • the flow of the body fluid towards the super-absorbent particles can be promoted by making the web V3 from predominantly non-absorbent and hydrophilic fibers, while the web V1 is made with a predominance of absorbent fibers.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Vascular Medicine (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Manufacturing & Machinery (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

L'invention concerne un procédé dans lequel au moins une première bande continue cardée (VI), comprenant au moins partiellement des fibres absorbantes, est associée à un nontissé support (NT1) et à une couche d'acquisition et de diffusion (NT2). Des particules (P) d'au moins un polymère super-absorbant sont insérées dans le matériau en bande composite formé selon le procédé de l'invention.
PCT/IT2003/000083 2002-03-01 2003-02-17 Procede de production d'une structure composite absorbante destinee a fabriquer des couches, des serviettes hygieniques et analogues, et structures produits par ce procede WO2003073971A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003214639A AU2003214639A1 (en) 2002-03-01 2003-02-17 Method for producing a composite absorbent structure for absorbent article, and structure formed in this way

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP02425114 2002-03-01
EP02425114.2 2002-03-01

Publications (2)

Publication Number Publication Date
WO2003073971A2 true WO2003073971A2 (fr) 2003-09-12
WO2003073971A3 WO2003073971A3 (fr) 2004-03-18

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008136583A (ja) * 2006-11-30 2008-06-19 Japan Absorbent Technology Institute 高吸水性複合シートおよび吸収体物品
CN105992575A (zh) * 2014-01-10 2016-10-05 尤妮佳股份有限公司 吸收性物品的片状部件的超声波熔敷装置以及超声波熔敷方法
US9662246B2 (en) 2012-08-01 2017-05-30 Smith & Nephew Plc Wound dressing and method of treatment
JP2017099855A (ja) * 2015-10-06 2017-06-08 ファメッカニカ．データ エス．ピー．エー． 吸収性構造を製造するための方法及び装置
US9877872B2 (en) 2011-07-14 2018-01-30 Smith & Nephew Plc Wound dressing and method of treatment
US10076449B2 (en) 2012-08-01 2018-09-18 Smith & Nephew Plc Wound dressing and method of treatment
US10201644B2 (en) 2005-09-07 2019-02-12 Smith & Nephew, Inc. Self contained wound dressing with micropump
CN110179593A (zh) * 2019-07-08 2019-08-30 广东佳丝维新材料科技有限公司 超柔吸液芯体及其制备系统和工艺
US10507141B2 (en) 2012-05-23 2019-12-17 Smith & Nephew Plc Apparatuses and methods for negative pressure wound therapy
US10610414B2 (en) 2014-06-18 2020-04-07 Smith & Nephew Plc Wound dressing and method of treatment
CN111529214A (zh) * 2020-04-17 2020-08-14 东华大学 一种具有导流扩散和防止颗粒滑动作用的芯体及制备方法
WO2022034468A1 (fr) * 2020-08-11 2022-02-17 Fameccanica.Data S.P.A. Procédé et appareil pour la production de noyaux absorbants sans peluches
US11559437B2 (en) 2016-10-28 2023-01-24 Smith & Nephew Plc Multi-layered wound dressing and method of manufacture

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5728083A (en) * 1994-06-30 1998-03-17 Mcneil-Ppc, Inc. Multilayered absorbent structures
US5752945A (en) * 1997-04-25 1998-05-19 Fibertech Group, Inc. Absorbent article with liquid transfer layer
WO1998028478A1 (fr) * 1996-12-20 1998-07-02 The Procter & Gamble Company Structure obtenue a sec comprenant des moyens neutralisant les mauvaises odeurs
WO1999048454A1 (fr) * 1998-03-25 1999-09-30 Kimberly-Clark Worldwide, Inc. Structure reduisant les fuites pour articles absorbants
US5964743A (en) * 1997-02-27 1999-10-12 Kimberly-Clark Worldwide, Inc. Elastic absorbent material for personal care products
DE10008746A1 (de) * 2000-02-24 2001-08-30 Fleissner Maschf Gmbh Co Verfahren und Vorrichtung zur Herstellung von Verbundvliesstoffen mittels hydrodynamischer Vernadelung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5728083A (en) * 1994-06-30 1998-03-17 Mcneil-Ppc, Inc. Multilayered absorbent structures
WO1998028478A1 (fr) * 1996-12-20 1998-07-02 The Procter & Gamble Company Structure obtenue a sec comprenant des moyens neutralisant les mauvaises odeurs
US5964743A (en) * 1997-02-27 1999-10-12 Kimberly-Clark Worldwide, Inc. Elastic absorbent material for personal care products
US5752945A (en) * 1997-04-25 1998-05-19 Fibertech Group, Inc. Absorbent article with liquid transfer layer
WO1999048454A1 (fr) * 1998-03-25 1999-09-30 Kimberly-Clark Worldwide, Inc. Structure reduisant les fuites pour articles absorbants
DE10008746A1 (de) * 2000-02-24 2001-08-30 Fleissner Maschf Gmbh Co Verfahren und Vorrichtung zur Herstellung von Verbundvliesstoffen mittels hydrodynamischer Vernadelung

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* Cited by examiner, † Cited by third party
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US10201644B2 (en) 2005-09-07 2019-02-12 Smith & Nephew, Inc. Self contained wound dressing with micropump
US11737925B2 (en) 2005-09-07 2023-08-29 Smith & Nephew, Inc. Self contained wound dressing with micropump
US11278658B2 (en) 2005-09-07 2022-03-22 Smith & Nephew, Inc. Self contained wound dressing with micropump
JP2008136583A (ja) * 2006-11-30 2008-06-19 Japan Absorbent Technology Institute 高吸水性複合シートおよび吸収体物品
US10231874B2 (en) 2010-11-08 2019-03-19 Smith & Nephew Plc Wound dressing and method of treatment
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US10507141B2 (en) 2012-05-23 2019-12-17 Smith & Nephew Plc Apparatuses and methods for negative pressure wound therapy
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US9662246B2 (en) 2012-08-01 2017-05-30 Smith & Nephew Plc Wound dressing and method of treatment
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US11864981B2 (en) 2012-08-01 2024-01-09 Smith & Nephew Plc Wound dressing and method of treatment
USD914887S1 (en) 2012-08-01 2021-03-30 Smith & Nephew Plc Wound dressing
US10076449B2 (en) 2012-08-01 2018-09-18 Smith & Nephew Plc Wound dressing and method of treatment
CN105992575A (zh) * 2014-01-10 2016-10-05 尤妮佳股份有限公司 吸收性物品的片状部件的超声波熔敷装置以及超声波熔敷方法
US10610414B2 (en) 2014-06-18 2020-04-07 Smith & Nephew Plc Wound dressing and method of treatment
US11596552B2 (en) 2014-06-18 2023-03-07 Smith & Nephew Plc Wound dressing and method of treatment
US11116677B2 (en) 2015-10-06 2021-09-14 Fameccanica, Data S.P A. Method and apparatus for producing an absorbent structure
US10682267B2 (en) 2015-10-06 2020-06-16 Fameccanica, Data S.P.A. Method and apparatus for producing an absorbent structure
JP2017099855A (ja) * 2015-10-06 2017-06-08 ファメッカニカ．データ エス．ピー．エー． 吸収性構造を製造するための方法及び装置
US11559437B2 (en) 2016-10-28 2023-01-24 Smith & Nephew Plc Multi-layered wound dressing and method of manufacture
CN110179593A (zh) * 2019-07-08 2019-08-30 广东佳丝维新材料科技有限公司 超柔吸液芯体及其制备系统和工艺
CN111529214A (zh) * 2020-04-17 2020-08-14 东华大学 一种具有导流扩散和防止颗粒滑动作用的芯体及制备方法
WO2022034468A1 (fr) * 2020-08-11 2022-02-17 Fameccanica.Data S.P.A. Procédé et appareil pour la production de noyaux absorbants sans peluches

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