New! View global litigation for patent families

WO1995021596A1 - Absorbent materials and preparation thereof - Google Patents

Absorbent materials and preparation thereof

Info

Publication number
WO1995021596A1
WO1995021596A1 PCT/US1995/001567 US9501567W WO1995021596A1 WO 1995021596 A1 WO1995021596 A1 WO 1995021596A1 US 9501567 W US9501567 W US 9501567W WO 1995021596 A1 WO1995021596 A1 WO 1995021596A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
article
absorbent
permanent
material
welds
Prior art date
Application number
PCT/US1995/001567
Other languages
French (fr)
Inventor
James Fewtrell
Original Assignee
Minnesota Mining And Manufacturing Company
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

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53Absorbent 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
    • A61F13/531Absorbent 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 a homogeneous composition through the thickness of the pad
    • A61F13/532Absorbent 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 a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
    • A61F13/5323Absorbent 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 a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad having absorbent material located in discrete regions, e.g. pockets

Abstract

An absorbent article formed of two fibrous webs with absorbent particles between the webs. The two webs are laminated together in a combination of permanent and semipermanent bonds. The semipermanent bonds define spaces containing absorbent particles. Upon absorption of liquid, the semipermanent bonds release as the absorbent particles expand. This ensures dimensional stability of the product after absorption of liquid.

Description

ABSORBENTMATERIALSAND PREPARATION THEREOF

Background and Field of the Invention

This invention relates to absorbent materials and to their manufacture. In particular the invention relates to absorbent materials comprising a laminate of two or more layers of fibres having absorbent material between the layers of fibres. In one aspect, the invention relates to materials suitable for use in diaper manufacture.

Diapers manufacturers have been looking for ways of using super absorbent polymers (SAP) in diaper products based on their performance to cost ratio and the reduction, in thickness of the products. The problem has been how to get the SAP powder/granules into a stable product so that liquid is absorbed effectively.

Some systems have had SAP distributed with a web of fibres. However, the web in these tend to be destroyed as the SAP swells on absorbing liquid and hence becomes very weak so requires additional supporting webs to be effective. Also the SAP is not kept away from the surface of the sorbent core and so feels wet unless other webs are used to cover the surface. U.S. Patents Nos. 4,994,053 and 5,149,335 disclose absorbent articles comprising two webs bonded together by bond lines which define a series of pockets for containing absorbent material, such as SAP. Laminated products comprising two webs bonded together with SAP therebetween can allow expansion if there are spaces between points of lamination but in these cases the SAP is free to migrate during processing or before getting wet giving uneven loading and reduced performance i.e. the SAP moves to places that do not get wet or it collects in lumps which are less effective at absorbing than when in thin layers due to a reduction in surface area in contact with the liquid. Our co-pending British Patent Application No. 9318971.0 discloses a liquid sorbent article comprising at least one layer of sorbent fibrous material and at least one hinge about which the article may be preferentially folded, the hinge being formed by permanently bonding the fibres of the layer under pressure along a line.

By providing sorbent sheet material with hinges formed by bonding fibres under pressure the strength characteristics of the article is improved and the use of the article in a variety of formats is facilitated. For example, suitable positioning of the hinges allows the article to be fan-folded for packaging and in use the article can be used in the form of a sheet, mini- pillow or boom by simple folding to increase the thickness of the article. The hinges enable the sheet material to adopt and maintain a folded configuration without the need for intermittent releasable bonds.

Preferably the hinges are formed by welding the fibres under pressure, more preferably by pressure welding without application of heat. The article is preferably constructed of at least two contiguous layers of sorbent material which are bonded together by a plurality of hinges and optionally at one or more edges. Such a two layer product has improved strength over a single layer article of the same basis weight.

The hinges are generally formed as a straight line extending across or along the length of the article. The hinges may be continuous or discontinuous, providing the article may be preferentially folded along the line. The hinge may be formed with perforations along the line to facilitate tearing the sheet into desired sizes. Preferably the articles comprise a plurality of parallel hinges.

However, welds need not be formed in a straight line and may adopt other configurations, e.g., sinusoidal or zig-zag paths. Such configurations are particularly suitable for use with multilayered articles since it allows contiguous layers to be bonded in a similar manner to quilting. Furthermore, by suitable positioning of the welds it is possible to form a series of pockets between two contiguous layers which can be filled with particles, e.g., absorbents, indicators, neutralizers, etc. The pockets prevent the particles from moving freely about the material. Such particles may be dropped onto the lower web prior to application of the upper web and pressure welding. The blunt slitters used for pressure welding may have working edges adopting the desired sinusoidal or zig-zag configuration and are conveniently arranged such that the re-entrant portions of adjacent welds are adjacent thereby dividing the web into substantially discrete islands.

EP 0146190 discloses an absorbent article comprising a layered absorbent structure having an upper surface and a lower surface, and comprising: (a) n webs of fibrous materials, n being an integer of two or more, said webs being layered such that there is an uppermost web, a lowermost web, n-2 intermediate webs, and n-1 interfaces of two opposed adjacent contacting surfaces of adjacent webs, each of the interfaces having a surface area; and (b) absorbent particles forming a discontinuous layer at one or more of the interfaces; the opposed adjacent contacting surfaces at each of the interfaces where the particles are present being substantially entirely frangibly bonded by fibre entanglement between the contacting surfaces, the particles being immobilized at the interface(s) substantially entirely by fibre entrapment. There is sufficient spacing between the particles to allow them to swell to maximum size before touching neighbouring particles. The particles are immobilized but free to absorb fluid as if they were unconstrained since the bonds between the contacting webs near a swelling particle will be easily broken allowing the particle to freely swell.

It has now been found that particularly useful absorbent products may be obtained by incorporating absorbents in spaces between layers of fibre webs which are laminated together with a combination of permanent and semi-permanent bonds. Description of the Invention

According to the present invention there is provided an absorbent- article comprising two contiguous layers of fibre webs having therebetween particles of absorbent material, the layers being laminated together by a combination of permanent bonds and semi-permanent bonds which are positioned to define spaces which contain particles of the absorbent material, the semi-permanent bonds being releasable upon expansion of the absorbent material as it absorbs liquid, the permanent bonds ensuring dimensional stability of the article before and after absorption of liquid. The absorbent articles of the invention provide a simple, effective arrangement for incorporation of particles of absorbent material within a laminated structure. A series of spaces or pockets is defined by the laminating bonds in which the particles are contained thereby restricting undue movement of the particles without having to immobilize individual particles. A portion of the laminating bonds are semi-permanent or releasable which break or release as the particles of absorbent swell thereby allowing the particles to retain maximum absorbing capacity. The invention does not require fibre entanglement to form the releasable bonds. Preferably the permanent bonds are positioned at least at the sides and/or ends of the article, more preferably completely around the periphery. The article may comprise other permanent bonds spaced across the layers, e.g., one or more lines of bonds. The permanent bonds may conveniently be formed by welding the layers, e.g., by heat, pressure, ultrasonics or any combination thereof. The result of the welding is that the fibres are completely fused together at the bond, the identity of individual fibres not being discernible in the bond. Adhesives may be used to form the permanent bonds although they are not preferred as more complex manufacturing equipment is required. The semi-permanent welds prevent unwanted migration of the particles of absorbent material and are preferably arranged to form a series of pockets in a similar manner to quilting. However, other arrangements are also possible, e.g., parallel lines of semi-permanent welds will restrict particle movement providing the lines are sufficiently close. The semi-permanent welds are preferably formed by cold pressure welding under conditions which are sufficient to cause fusing of the contacting surfaces of fibres thereby retaining identity of the fibres at the bond. During expansion of the SAP the pressure will be sufficient to break the bond between overlapping fibres without breakage of many of the fibres so that the article retains its structural integrity. Adhesives such as those which lose adhesion on wetting may be used, although these are not preferred as they require more complex manufacturing equipment.

In a preferred embodiment both the permanent and semi-permanent welds are formed by cold pressure welding using blunt slitters, the blunt slitters having working edges having a sinusoidal or zig-zag configuration. The articles of the present invention can be formed from a wide range of sorbent sheet materials which can be laminated. Such sheet material include, for example nonwoven, fibre webs such as microfibrous sheet material, and wood pulp based webs which are well known to those skilled in the art. The article generally has a basis weight of from 20 to 500g/m2.

The articles of the present invention are preferably formed from at least one layer of sorbent microfibrous sheet materials, particularly melt blown microfibrous materials. Such materials are described, for example, in van Wente "Superfine Thermoplastic Fibres", Industrial Engineering Chemistry, vol. 48, pp. 1342 et seq. (1956), or in Report No. 4364, Naval Research Laboratories, May 25, 1954, "Manufacture of Superfine Organic Fibres" by van Wente, A. Boone, CD., and Fluharty, E.L.

More preferably, the articles of the present invention are formed from at least one layer of melt blown microfibrous materials containing a surfactant topically applied or incorporated by direct addition of the surfactant to the molten polymer stream. Sorbent articles based on these __ , _,___ 95/21596

materials are suitable for use on either oil or water based spills. Such materials having surfactant incorporated in the fibre are described in U.S. Patent No. 4,933,229 (Insley et al.).

Most preferably, the articles of the invention are formed from melt

5 blown microfibre webs which contain microfibre microwebs and crimped bulking staple fibres as described in U.S. Patent No. 4,813,948 (Insley).

Polymeric materials suitable for use in preparing the microfibrous sheet or web material include, but are not limited to polyolefins such as polyethylene and polypropylene, polyesters such as poly(ethylene 0 terephthalate) and polyamides such as nylons, blends or copolymers. The microfibrous sheet materials are preferably based on polyethylene, polypropylene, or blends of the two resins.

Other materials such as UV stabilizers, dyes, pigments, etc., can also be incorporated directly into the melt blown microfibrous sheet 5 materials during the melt blowing process by blending the additive with the polymer prior to extrusion.

Articles of the present invention which are formed from melt blown microfibrous materials typically have sufficient strength, even when saturated with liquid, that an outer facing is not required to maintain 0 integrity. An optional outer facing may, however, be provided by applying a scrim material, for example, to the microfibrous sheet materials prior to lamination to improve the appearance of the article and coincidentally produce a more durable article. This can be accomplished by collecting the melt blown microfibrous web material directly on the facing or 5 alternatively bonding the facing to the microfibrous material by using an intermittent adhesive pattern or pin laminating the materials together. Facing material can also be applied to the microfibrous sheet material as a coating, for example, latex, at a level which does not substantially affect the sorbency of the microfibrous sheet material. 0 Scrim materials suitable for use in the preparation of the articles of the present invention preferably have a relatively open structure, such as obtainable with nonwoven fabrics or open weave woven fabrics, so that they can be readily penetrated by both oil and aqueous based fluids. Additionally, suitable scrim materials are preferably chemically inert. Particularly preferred scrim materials include spunbond non-woven polypropylene fabrics such as 0.5 oz/yd2 CELESTRA, available from Fiberweb North America, Inc.

The particles of absorbent material are preferably SAP materials, e.g., cross-linked acrylate polymers of the type commercially available from Dow under the trade designation X2 95889.01 , polyacrylamide polymers of the type commercially available from Allied Colloids under the trade mark VERSICOL W25 and sodium acrylates of the type commercially available from Atochem under the trade mark AQUAKEEP D50-65. Such materials are designed for absorption of water based fluids. Other SAP materials may also be employed, e.g., copolymers of aromatic alkenes and dialkenes that are designed to absorb oils, acids and alkalis. Other absorbent materials which may be employed include sorbent fibres, microfibres and microwebs, e.g., scrap blown microfibres from edge trims and other waste from the production of sorbent articles.

Other solid materials may also be incorporated between the layers, e.g., neutralizers for acids or bases, such as, sodium carbonate for products dealing with acid spills. Indicators, e.g., of the litmus type, disinfectants, etc., may also be employed.

The articles of the invention are particularly suitable as absorbent laminates for incorporation into a diaper or other personal hygiene product to act as the absorbent core.

Typically two layers of blown microfibre absorbent webs (50 to 150gsm each) are welded together at the edge and with a centre line to form two tubes. (Typical size of diaper = 14 x 44cm). These permanent welds can be achieved by heat, pressure, ultrasonics or combination of these. Super absorbent polymer (SAP) is spread evenly between the layers but not in areas of the permanent welds, prior to the welding process. (Typically maximum 14g per 14 x 44cm). Further semi¬ permanent welds are made over the SAP-bmf using pressure. These welds keep the SAP in place by both the pocketing design and closeness of the welds. The top layer of bmf (blown microfibre) is hydrophilic and absorbs the liquid, the bottom layer is hydrophobic and prevents the passage of liquid through the article (this latter layer could be a spunbond web on a film, rather than a bmf web). Both layers encase the SAP to act as a carrier. The top layer promotes the absorption and spread of liquid over a large surface area and allows a large surface area of SAP to quickly contact the liquid.

Once wet the SAP swells. The semi-permanent welds break allowing expansion without damage to the webs. The webs now act as a case encapsulating the absorbed liquid with sufficient strength not to break open. The SAP when wet is sticky and so does not migrate once the welds have opened.

The semi-permanent welds allow both expansion of the SAP without destruction of the web and also good anchoring of the SAP in places where it is needed. Therefore the SAP is used efficiently. The weld lines also help promote wicking throughout the product. Therefore the absorbent does not absorb in one place but is maximized over the full surface of the product. The SAP absorbs quite slowly and blown microfibre web quickly, so to pick up liquid quickly it is ideal to absorb liquid first into the blown microfibre web and then SAP begins to absorb the liquid out of the blown microfibre. This means that liquid can be quickly adsorbed by the web and also that the web tends to dry out after wetting which is a desirable feature in this type of application.

The product can be incorporated directly into standard wood pulp filled diaper lines without large redesign of the lines because it is strong enough to be unwound and pulled through the lines without breaking. The ,..,... tn, 95/21596

product may be supplied in long lengths, with the diaper manufacturer cutting the product to length (typically 44cm) and making the end welds.

The use of a hydrophobic bottom web gives soft feel, bulk and strength to the product, whilst preventing the penetration of liquid through 5 to the outside of the diaper.

Brief Description of the Drawings

The invention will now be described with reference to the accompanying drawings in which: 0 Figure 1 is a perspective view of an absorbent article in accordance with the invention,

Figure 2 is a cross-section through the article of Figure 1 , and Figure 3 is a cross-section through the article of Figure 1 after absorption of liquid. 5

Detailed Description of the Drawings and Preferred Modes

Figures 1 to 3 illustrate a sorbent article in accordance with the invention comprising two layers (2, 4) of fibre webs. At least one, preferably both layers, comprise blown microfibre web. Blown microfibre 0 web is formed by extruding fibres through a dye onto a collector. The side of the web that contacts the collector has a smooth relatively lint-free surface finish and the other side is usually more ragged. Preferably the blown microfibre webs are arranged with the rough surfaces in contact so that the outer surfaces of the article are smooth thereby providing a 5 satisfactory look and feel to the article. In the case of material for use in a diaper one layer (2) is preferably a hydrophilic sorbent layer and one layer

(4) is preferably hydrophobic.

The layers (2, 4) are permanently bonded to each other by permanent welds (6) positioned at the edges of the web and a permanent 0 weld (8) which is centrally positioned. These welds are conveniently formed by passing the composite layers through blunt slitter rolls such that the layers are welded together under pressure without being slit.

Alternatively, heat or ultrasonic welding may be employed or combinations of these methods.

The article additionally comprises a series of parallel semi- permanent welds (10) and sinusoidal semipermanent welds (12). These semi-permanent welds may be formed by cold pressure welding using blunt slitter rolls. It has been found that cold welding pressures of 200 to- 1000N/mm2 provides good semi-permanent welds with many commercially available polyolefin non-wovens. In real terms, this is about 100 to 1000N force applied to a slitter wheel having a flattened face of from 0.5 to 2mm width. It is important that the flat face of the slitter wheel does not have sharp edges which would result in cutting of the webs.

The welds between the layers (2, 4) provide a series of pockets (14) which contain particulate material (16). The particulate material comprises an absorbent, preferably SAP material. The particulate material is deposited on the lower layer (4) prior to application of the upper layer (2) before the composite is passed through the slitter rolls to form the permanent and semipermanent welds. The arrangement of welds prevents the particulate material from readily moving through the article during transportation, handling and use thereby ensuring the article retains uniform properties throughout its length.

The pocket dimensions should be small enough to prevent unwanted movement of powder, but minimized in number so as to reduce the manufacturing difficulties and reduce the area of compressed web. Conveniently the pockets have length and width dimensions in the range 1.5 to 4cm. However, it is possible to control movement of powder by using straight parallel welds to form tubes preferably having a width of 1 to 2cm.

Figure 3 shows a cross-section through the sorbent article after it has been saturated with liquid. The absorbent (16) swells as it absorbs liquid bursting the 5 semi-permeable welds (10, 12). Dimensional stability of the article is maintained by the permanent welds (6, 8).

Claims

1. An absorbent article comprising two contiguous layers of fibre webs having therebetween particles of absorbent material, the layers being laminated together by a combination of permanent bonds and semi¬ permanent bonds which are positioned to define spaces which contain particles of the absorbent material, the semi-permanent bonds being releasable upon expansion of the absorbent material as it absorbs liquid, the permanent bonds ensuring dimensional stability of the article before and after absorption of liquid.
2. An absorbent article as claimed in Claim 1 having permanent welds along its major edges.
3. An absorbent article as claimed in Claim 1 or Claim 2 having a permanent weld substantially around its periphery.
4. An absorbent article as claimed in any preceding claim comprising a plurality of semi-permanent welds extending along the length thereof.
5. An absorbent article as claimed in any preceding claim comprising a plurality of sinusoidal or zig-zag semi-permanent welds extending along the length thereof.
6. An absorbent article as claimed in any preceding Claim in which at least one of the layers comprises blown microbfibres.
7. An absorbent article as claimed in claim 6 in which the fibre webs are of polypropylene.
8. An absorbent article as claimed in any preceding claim in which the permanent bonds are formed by heat, pressure and/or ultrasonic welding.
9. An absorbent article as claimed in any preceding Claim in which the semi-permanent bonds are formed by pressure welding.
10. An absorbent article as claimed in any preceding Claim in which the particles of absorbent material comprise super absorbent polymer.
11. An absorbent article as claimed in any preceding Claim in which one layer of fibres is hydrophilic and the other layer of fibres is hydrophobic.
12. An absorbent article as claimed in Claim 1 substantially as herein described with reference to the accompanying drawings.
13. A method of making an article as defined in Claim 1 which comprises: providing a first layer of fibre web, applying particles of absorbent material to a surface of said first layer, providing a second layer of fibre web over said particles of absorbent material, and bonding said first and second layer together by a combination of permanent and semi¬ permanent bonds.
14. A method of making an article as claimed in Claim 13 in which the permanent bonds are formed by heat, pressure, and/or ultrasonic welding.
15. A method of making an article as claimed in Claim 13 or claim 14 in which the semi-permanent bonds are formed by pressure welding.
16. A method of making an article as claimed in any one of
Claims 13 to 15 in which the semi-permanent welds are formed by passing the two layers between a blunt slitter roll and a solid support to effect a semi-permanent weld.
17. A method of making an article as claimed in Claim 16 in which the slitter roll exerts a pressure of from 200 to 1000 N/mm2.
18. A method of making an article as claimed in Claim 16 or Claim 17 in which the two layers are passed through a slitter apparatus comprising two cutting slitter rolls spaced apart and at least one blunt slitter roll positioned therebetween.
19. A method of making an article as claimed in Claim 18 in which the slitter apparatus comprises a plurality of blunt slitter rolls spaced equidistant between the cutting slitter rolls.
20. A method of making -an article as claimed in any one of Claims 16 to 19 in which the blunt slitter roll(s) has a sinusoidal or zig-zag working edge.
21. A method of making an article as claimed in any one of Claims 13 to 20 in which at least one of the layers comprises blown microbfibres.
22. A method of making an article as claimed in Claim 21 in which the fibre webs are of polypropylene.
23. A method of making an article as claimed in any one of Claims 13 to 22 in which the particles of absorbent material comprise, super absorbent polymer.
24. A method of making an article as claimed in any one of Claims 13 to 23 in which one layer of fibres is hydrophilic and the other layer of fibres is hydrophobic.
25. A method of making an article as claimed in Claim 13 substantially as herein described with reference to the accompanying drawings.
PCT/US1995/001567 1994-02-11 1995-02-07 Absorbent materials and preparation thereof WO1995021596A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9402706.7 1994-02-11
GB9402706A GB9402706D0 (en) 1994-02-11 1994-02-11 Absorbent materials and preparation thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19950912547 EP0743844A1 (en) 1994-02-11 1995-02-07 Absorbent materials and preparation thereof

Publications (1)

Publication Number Publication Date
WO1995021596A1 true true WO1995021596A1 (en) 1995-08-17

Family

ID=10750280

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/001567 WO1995021596A1 (en) 1994-02-11 1995-02-07 Absorbent materials and preparation thereof

Country Status (3)

Country Link
EP (1) EP0743844A1 (en)
GB (1) GB9402706D0 (en)
WO (1) WO1995021596A1 (en)

Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0829245A2 (en) * 1996-09-12 1998-03-18 Uni-Charm Corporation Absorbent article
WO1998037846A1 (en) * 1997-02-27 1998-09-03 Kimberly-Clark Worldwide, Inc. Stretchable absorbent structure for personal care products
US5830202A (en) * 1994-08-01 1998-11-03 The Procter & Gamble Company Absorbent comprising upper and lower gel layers
US5855572A (en) * 1996-03-22 1999-01-05 The Procter & Gamble Company Absorbent components having a fluid acquisition zone
US5895379A (en) * 1996-03-22 1999-04-20 The Procter & Gamble Company Absorbent cores having improved acquisition capability, and absorbent articles containing them
US6372952B1 (en) 1996-03-22 2002-04-16 The Procter & Gamble Company Absorbent components having a sustained acquisition rate capability upon absorbing multiple discharges of aqueous body fluids
WO2005102235A1 (en) * 2004-04-22 2005-11-03 Saueressig Gmbh + Co. Process for producing an absorbing fibre product
EP2441417A1 (en) * 2010-10-13 2012-04-18 Romanova bvba starter Absorbent structure
EP2441418A1 (en) * 2010-10-13 2012-04-18 Romanova bvba starter Absorbent structure
WO2012048878A1 (en) * 2010-10-13 2012-04-19 Romanova Bvba Starter Method and apparatus for producing composite structure
EP2444046A1 (en) * 2010-10-20 2012-04-25 Vynka Bvba Environmentally friendly absorbent structure
EP2444044A1 (en) * 2010-10-13 2012-04-25 Romanova bvba starter Method and apparatus for producing absorbent structures
EP2444043A1 (en) * 2010-10-13 2012-04-25 Romanova bvba starter Improved absorbent structure
EP2444045A1 (en) * 2010-10-20 2012-04-25 Vynka Bvba Method and apparatus for producing an environmentally friendly absorbent structure
EP2450012A1 (en) * 2010-10-13 2012-05-09 Romanova bvba starter Improved absorbent structure
EP2586409A1 (en) * 2011-10-24 2013-05-01 Bostik SA New absorbent article and process for making it
WO2013060733A1 (en) * 2011-10-24 2013-05-02 Bostik Sa New absorbent article and process for making it
EP2740449A1 (en) * 2012-12-10 2014-06-11 The Procter and Gamble Company Absorbent article with high absorbent material content
EP2813200A1 (en) * 2013-06-14 2014-12-17 Rkw Se Absorbent composites
US8979815B2 (en) 2012-12-10 2015-03-17 The Procter & Gamble Company Absorbent articles with channels
US9060904B2 (en) 2007-06-18 2015-06-23 The Procter & Gamble Company Disposable absorbent article with sealed absorbent core with substantially continuously distributed absorbent particulate polymer material
US9066838B2 (en) 2011-06-10 2015-06-30 The Procter & Gamble Company Disposable diaper having reduced absorbent core to backsheet gluing
US9072634B2 (en) 2007-06-18 2015-07-07 The Procter & Gamble Company Disposable absorbent article with substantially continuously distributed absorbent particulate polymer material and method
US9216116B2 (en) 2012-12-10 2015-12-22 The Procter & Gamble Company Absorbent articles with channels
US9216118B2 (en) 2012-12-10 2015-12-22 The Procter & Gamble Company Absorbent articles with channels and/or pockets
EP2667833B1 (en) 2011-01-27 2016-03-30 Unicharm Corporation Absorbent article
US9326896B2 (en) 2008-04-29 2016-05-03 The Procter & Gamble Company Process for making an absorbent core with strain resistant core cover
US9333120B2 (en) 2005-05-20 2016-05-10 The Procter & Gamble Company Disposable absorbent article having breathable side flaps
US9340363B2 (en) 2009-12-02 2016-05-17 The Procter & Gamble Company Apparatus and method for transferring particulate material
US9468566B2 (en) 2011-06-10 2016-10-18 The Procter & Gamble Company Absorbent structure for absorbent articles
US9492328B2 (en) 2011-06-10 2016-11-15 The Procter & Gamble Company Method and apparatus for making absorbent structures with absorbent material
US9532910B2 (en) 2012-11-13 2017-01-03 The Procter & Gamble Company Absorbent articles with channels and signals
DE102015009334A1 (en) * 2015-07-23 2017-01-26 Rkw Se Absorbent liner for food
US9561139B2 (en) 2006-02-22 2017-02-07 Dsg Technology Holdings Ltd. Method of making an absorbent composite and absorbent articles employing the same
WO2017022655A1 (en) * 2015-07-31 2017-02-09 大王製紙株式会社 Absorbent article
US9566198B2 (en) 2013-03-15 2017-02-14 Dsg Technology Holdings Ltd. Method of making an absorbent composite and absorbent articles employing the same
US9585798B2 (en) 2009-05-20 2017-03-07 Basf Se Water absorbent storage layers
US9649229B2 (en) 2011-10-24 2017-05-16 Basf Se Process for preparing an absorbent article
US9668926B2 (en) 2011-06-10 2017-06-06 The Procter & Gamble Company Method and apparatus for making absorbent structures with absorbent material
US9713557B2 (en) 2012-12-10 2017-07-25 The Procter & Gamble Company Absorbent article with high absorbent material content
US9763835B2 (en) 2003-02-12 2017-09-19 The Procter & Gamble Company Comfortable diaper
JP2017176497A (en) * 2016-03-30 2017-10-05 大王製紙株式会社 The absorbent article
JP2017176507A (en) * 2016-03-30 2017-10-05 大王製紙株式会社 The absorbent article
JP2017176508A (en) * 2016-03-30 2017-10-05 大王製紙株式会社 The absorbent article
US9789014B2 (en) 2013-03-15 2017-10-17 Dsg Technology Holdings Ltd. Method of making an absorbent composite and absorbent articles employing the same
US9789011B2 (en) 2013-08-27 2017-10-17 The Procter & Gamble Company Absorbent articles with channels
US9789009B2 (en) 2013-12-19 2017-10-17 The Procter & Gamble Company Absorbent articles having channel-forming areas and wetness indicator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980001455A1 (en) * 1979-01-12 1980-07-24 Beghin Say Sa Insertion process of super absorbing product in a fiber structure
EP0146190A2 (en) * 1983-12-20 1985-06-26 THE PROCTER & GAMBLE COMPANY Absorbent laminate structure and process of manufacture thereof
FR2656794A1 (en) * 1990-01-05 1991-07-12 Peaudouce Sa Diaper with an improved absorbent pad
US5149335A (en) * 1990-02-23 1992-09-22 Kimberly-Clark Corporation Absorbent structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980001455A1 (en) * 1979-01-12 1980-07-24 Beghin Say Sa Insertion process of super absorbing product in a fiber structure
EP0146190A2 (en) * 1983-12-20 1985-06-26 THE PROCTER & GAMBLE COMPANY Absorbent laminate structure and process of manufacture thereof
FR2656794A1 (en) * 1990-01-05 1991-07-12 Peaudouce Sa Diaper with an improved absorbent pad
US5149335A (en) * 1990-02-23 1992-09-22 Kimberly-Clark Corporation Absorbent structure

Cited By (78)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5830202A (en) * 1994-08-01 1998-11-03 The Procter & Gamble Company Absorbent comprising upper and lower gel layers
US6372952B1 (en) 1996-03-22 2002-04-16 The Procter & Gamble Company Absorbent components having a sustained acquisition rate capability upon absorbing multiple discharges of aqueous body fluids
US5855572A (en) * 1996-03-22 1999-01-05 The Procter & Gamble Company Absorbent components having a fluid acquisition zone
US5895379A (en) * 1996-03-22 1999-04-20 The Procter & Gamble Company Absorbent cores having improved acquisition capability, and absorbent articles containing them
US5994614A (en) * 1996-09-12 1999-11-30 Uni-Charm Corporation Absorbent article
EP0829245A3 (en) * 1996-09-12 1998-04-01 Uni-Charm Corporation Absorbent article
EP0829245A2 (en) * 1996-09-12 1998-03-18 Uni-Charm Corporation Absorbent article
GB2337024A (en) * 1997-02-27 1999-11-10 Kimberly Clark Co Stretchable absorbent structure for personal care products
US5964743A (en) * 1997-02-27 1999-10-12 Kimberly-Clark Worldwide, Inc. Elastic absorbent material for personal care products
WO1998037846A1 (en) * 1997-02-27 1998-09-03 Kimberly-Clark Worldwide, Inc. Stretchable absorbent structure for personal care products
GB2337024B (en) * 1997-02-27 2000-10-04 Kimberly Clark Co Stretchable absorbent structure for personal care products
US9763835B2 (en) 2003-02-12 2017-09-19 The Procter & Gamble Company Comfortable diaper
WO2005102235A1 (en) * 2004-04-22 2005-11-03 Saueressig Gmbh + Co. Process for producing an absorbing fibre product
US9333120B2 (en) 2005-05-20 2016-05-10 The Procter & Gamble Company Disposable absorbent article having breathable side flaps
US9561139B2 (en) 2006-02-22 2017-02-07 Dsg Technology Holdings Ltd. Method of making an absorbent composite and absorbent articles employing the same
US9757284B2 (en) 2006-02-22 2017-09-12 Dsg Technology Holdings Ltd. Method of making an absorbent composite and absorbent articles employing the same
US9241845B2 (en) 2007-06-18 2016-01-26 The Procter & Gamble Company Disposable absorbent article with sealed absorbent core with substantially continuously distributed absorbent particulate polymer material
US9060904B2 (en) 2007-06-18 2015-06-23 The Procter & Gamble Company Disposable absorbent article with sealed absorbent core with substantially continuously distributed absorbent particulate polymer material
US9072634B2 (en) 2007-06-18 2015-07-07 The Procter & Gamble Company Disposable absorbent article with substantially continuously distributed absorbent particulate polymer material and method
US9326896B2 (en) 2008-04-29 2016-05-03 The Procter & Gamble Company Process for making an absorbent core with strain resistant core cover
US9585798B2 (en) 2009-05-20 2017-03-07 Basf Se Water absorbent storage layers
US9340363B2 (en) 2009-12-02 2016-05-17 The Procter & Gamble Company Apparatus and method for transferring particulate material
EP2810630A1 (en) * 2010-10-13 2014-12-10 Romanova bvba starter Absorbent structure
EP2450012A1 (en) * 2010-10-13 2012-05-09 Romanova bvba starter Improved absorbent structure
EP2444044A1 (en) * 2010-10-13 2012-04-25 Romanova bvba starter Method and apparatus for producing absorbent structures
CN103313683A (en) * 2010-10-13 2013-09-18 罗曼诺瓦启动器有限公司 Absorbent structure
EP2441417A1 (en) * 2010-10-13 2012-04-18 Romanova bvba starter Absorbent structure
WO2012048879A1 (en) * 2010-10-13 2012-04-19 Romanova Bvba Starter Absorbent structure
US9603750B2 (en) 2010-10-13 2017-03-28 Romanova Bvba Starter Method and apparatus for producing composite structure
EP2444043A1 (en) * 2010-10-13 2012-04-25 Romanova bvba starter Improved absorbent structure
WO2012048878A1 (en) * 2010-10-13 2012-04-19 Romanova Bvba Starter Method and apparatus for producing composite structure
EP2441418A1 (en) * 2010-10-13 2012-04-18 Romanova bvba starter Absorbent structure
US9295593B2 (en) 2010-10-20 2016-03-29 Vynka Bvba Environmentally friendly absorbent structure
RU2613159C2 (en) * 2010-10-20 2017-03-15 Драйлок Текнолоджиз НВ Method and device for production of environmentally safe absorbing structure
EP2444046A1 (en) * 2010-10-20 2012-04-25 Vynka Bvba Environmentally friendly absorbent structure
JP2014500736A (en) * 2010-10-20 2014-01-16 フィンカ ベーフェーベーアーVynka bvba Environment-friendly absorbent structure
WO2012052173A1 (en) * 2010-10-20 2012-04-26 Vynka Bvba Method and apparatus for producing an environmentally friendly absorbent structure
WO2012052172A1 (en) * 2010-10-20 2012-04-26 Vynka Bvba Environmentally friendly absorbent structure
JP2017124209A (en) * 2010-10-20 2017-07-20 ドライロック テクノロジーズ エンフェー Absorbent structure friendly to environment
EP2444045A1 (en) * 2010-10-20 2012-04-25 Vynka Bvba Method and apparatus for producing an environmentally friendly absorbent structure
RU2614088C2 (en) * 2010-10-20 2017-03-22 Драйлок Текнолоджиз НВ Environmentally safe absorbent structure
EP2667833B1 (en) 2011-01-27 2016-03-30 Unicharm Corporation Absorbent article
US9066838B2 (en) 2011-06-10 2015-06-30 The Procter & Gamble Company Disposable diaper having reduced absorbent core to backsheet gluing
US9649232B2 (en) 2011-06-10 2017-05-16 The Procter & Gamble Company Disposable diaper having reduced absorbent core to backsheet gluing
US9668926B2 (en) 2011-06-10 2017-06-06 The Procter & Gamble Company Method and apparatus for making absorbent structures with absorbent material
US9492328B2 (en) 2011-06-10 2016-11-15 The Procter & Gamble Company Method and apparatus for making absorbent structures with absorbent material
US9173784B2 (en) 2011-06-10 2015-11-03 The Procter & Gamble Company Disposable diaper having reduced absorbent core to backsheet gluing
US9468566B2 (en) 2011-06-10 2016-10-18 The Procter & Gamble Company Absorbent structure for absorbent articles
US9789007B2 (en) 2011-10-24 2017-10-17 Basf Se Process for preparing an absorbent article
WO2013060733A1 (en) * 2011-10-24 2013-05-02 Bostik Sa New absorbent article and process for making it
US9532906B2 (en) 2011-10-24 2017-01-03 Basf Se Absorbent article and process for making it
EP2586409A1 (en) * 2011-10-24 2013-05-01 Bostik SA New absorbent article and process for making it
US9649229B2 (en) 2011-10-24 2017-05-16 Basf Se Process for preparing an absorbent article
CN104053422A (en) * 2011-10-24 2014-09-17 波士胶公司 New absorbent article and process for making it
US9532910B2 (en) 2012-11-13 2017-01-03 The Procter & Gamble Company Absorbent articles with channels and signals
US9216118B2 (en) 2012-12-10 2015-12-22 The Procter & Gamble Company Absorbent articles with channels and/or pockets
EP2740449A1 (en) * 2012-12-10 2014-06-11 The Procter and Gamble Company Absorbent article with high absorbent material content
GB2522595A (en) * 2012-12-10 2015-07-29 Procter & Gamble Absorbent article with high aborsorbent material content
US8979815B2 (en) 2012-12-10 2015-03-17 The Procter & Gamble Company Absorbent articles with channels
US9713557B2 (en) 2012-12-10 2017-07-25 The Procter & Gamble Company Absorbent article with high absorbent material content
WO2014093310A1 (en) * 2012-12-10 2014-06-19 The Procter & Gamble Company Absorbent article with high aborsorbent material content
US9375358B2 (en) 2012-12-10 2016-06-28 The Procter & Gamble Company Absorbent article with high absorbent material content
US9216116B2 (en) 2012-12-10 2015-12-22 The Procter & Gamble Company Absorbent articles with channels
US9566198B2 (en) 2013-03-15 2017-02-14 Dsg Technology Holdings Ltd. Method of making an absorbent composite and absorbent articles employing the same
US9789014B2 (en) 2013-03-15 2017-10-17 Dsg Technology Holdings Ltd. Method of making an absorbent composite and absorbent articles employing the same
EP2813200A1 (en) * 2013-06-14 2014-12-17 Rkw Se Absorbent composites
WO2014198391A1 (en) * 2013-06-14 2014-12-18 Rkw Se Absorbent composites
US9789011B2 (en) 2013-08-27 2017-10-17 The Procter & Gamble Company Absorbent articles with channels
US9789009B2 (en) 2013-12-19 2017-10-17 The Procter & Gamble Company Absorbent articles having channel-forming areas and wetness indicator
DE102015009334A1 (en) * 2015-07-23 2017-01-26 Rkw Se Absorbent liner for food
JP2017029353A (en) * 2015-07-31 2017-02-09 大王製紙株式会社 The absorbent article
WO2017022655A1 (en) * 2015-07-31 2017-02-09 大王製紙株式会社 Absorbent article
WO2017169344A1 (en) * 2016-03-30 2017-10-05 大王製紙株式会社 Absorbent article
WO2017169343A1 (en) * 2016-03-30 2017-10-05 大王製紙株式会社 Absorbent article
WO2017169379A1 (en) * 2016-03-30 2017-10-05 大王製紙株式会社 Absorbent article
JP2017176507A (en) * 2016-03-30 2017-10-05 大王製紙株式会社 The absorbent article
JP2017176497A (en) * 2016-03-30 2017-10-05 大王製紙株式会社 The absorbent article
JP2017176508A (en) * 2016-03-30 2017-10-05 大王製紙株式会社 The absorbent article

Also Published As

Publication number Publication date Type
GB9402706D0 (en) 1994-04-06 grant
EP0743844A1 (en) 1996-11-27 application

Similar Documents

Publication Publication Date Title
US3416524A (en) Surgical dressing
US3169899A (en) Nonwoven fiberous sheet of continuous strand material and the method of making same
US4282874A (en) Disposable absorbent article of manufacture
US5283106A (en) Nonwoven material of two or more layers, in particular with long-term filter properties and manufacture thereof
US4734324A (en) Heat sealable microporous polypropylene films
US4606964A (en) Bulked web composite and method of making the same
US5013309A (en) Incontinent pad with high absorbent packet
US5820645A (en) Pleatable nonwoven composite article for gas filter media
US4595629A (en) Water impervious materials
US4882213A (en) Absorbent article with tear line guide
US5601716A (en) Filter material
US3530023A (en) Laminated sheet material and methods of making such material
US5482761A (en) Layered, absorbent structure
US6293935B1 (en) Absorbent article with liquid shrinkable elements
US6916969B1 (en) Material laminate for use as a covering sheet in an absorbent article
US5080951A (en) Nonwoven fabric
US5244703A (en) Vacuum cleaner bag
US6193773B1 (en) Dust filter bag
US4381783A (en) Absorbent article
US4892769A (en) Fire resistant thermoplastic material containing absorbent article
US20020016122A1 (en) Elastic laminate web
US4103058A (en) Pillowed web of blown microfibers
USRE32957E (en) Absorbent article
US4154883A (en) Emboss laminated fibrous material
US5246474A (en) Process for manufacturing a self-supporting filter unit

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AM AT AU BB BG BR BY CA CH CN CZ DE DK EE ES FI GB GE HU JP KE KG KP KR KZ LK LR LT LU LV MD MG MN MW MX NL NO NZ PL PT RO RU SD SE SI SK TJ TT UA US UZ VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): KE MW SD SZ AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1995912547

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1995912547

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase in:

Ref country code: CA

WWW Wipo information: withdrawn in national office

Ref document number: 1995912547

Country of ref document: EP