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WO1997018783A9 - Corps repartitif et/ou absorbant - Google Patents

Corps repartitif et/ou absorbant

Info

Publication number
WO1997018783A9
WO1997018783A9 PCT/SE1996/001523 SE9601523W WO9718783A9 WO 1997018783 A9 WO1997018783 A9 WO 1997018783A9 SE 9601523 W SE9601523 W SE 9601523W WO 9718783 A9 WO9718783 A9 WO 9718783A9
Authority
WO
WIPO (PCT)
Prior art keywords
web
channels
fluid distribution
fibre
roll
Prior art date
Application number
PCT/SE1996/001523
Other languages
English (en)
Other versions
WO1997018783A1 (fr
Filing date
Publication date
Priority claimed from SE9504164A external-priority patent/SE9504164L/xx
Application filed filed Critical
Priority to EP96940216A priority Critical patent/EP0957866A1/fr
Publication of WO1997018783A1 publication Critical patent/WO1997018783A1/fr
Publication of WO1997018783A9 publication Critical patent/WO1997018783A9/fr

Links

Definitions

  • the present invention relates to a web with a material composition having properties permitting fluid di ⁇ tri- bution and/or absorption, and is intended for use in articles for personal hygiene, e.g. thin sanitary towels, underwear protectors, diapers, incontinence protectors etc., for clinical applications, e.g. mats for instruments used in surgical operations, and in general applications where the mentioned properties are desirable, e.g. absorbents for fish trays, packaged foods etc., the web also being provided with a plura ⁇ lity of channels for enabling directed liquid distribu ⁇ tion.
  • Absorption products used today in such as sanitary towels, are made up so that they prevent, as far as possible, the leakage of body liquids from the side edges of the article in question.
  • the absorption bodies in the products are provided with longitudinal channels for spreading out the liquid.
  • the materials used here up to now are usually dry-formed, absorbing fibres, which may also include synthetic fibres, and are usually embossed at high temperature and pressure to provide longitudinal channels for directed longitudinal distribution of the liquid deposited on the products.
  • the object of the present invention is to achieve a web of the kind mentioned in the introduction and which is made up from a wet-formed fibre material, e.g. tissue, paper or non-woven, comprising a mixture of cellulose and synthetic fibres, the web being provided with channels embossed on it under low pressure, with the intention of acquisition, absorption and fluid distri- bution properties for dealing with liquids deposited on the web.
  • a wet-formed fibre material e.g. tissue, paper or non-woven
  • the web being provided with channels embossed on it under low pressure
  • a conventional tissue based on cellulose fibres alone has limitations, primarily in its dimensional stability, but also in its ability to facilitate fluid distribution. This low stability results in that the tissue material collapses when it becomes wet, becoming elongated in length and width, particularly in length. Liquid distribution in this kind of tissue is greater transversally than longitudi ⁇ nally, due to the creping it is given during manufac ⁇ ture. These limiting characteristics of conventional tissue make it unsuitable for the rapid absorption and directed fluid distribution, where these material properties have high priority, even though the tissue be provided with channels.
  • One condition for obtaining the desired properties is dimensional stability of the paper structure in a wet state, and this can be obtain ⁇ ed by an mixture of synthetic fibres.
  • the negative effect of creping, which limits absorption and fluid distribution properties, can be counteracted by em ⁇ bossing channels into the web.
  • channels and a synthetic fibre mixture With channels and a synthetic fibre mixture a ratio of 5:1 can be obtained between longitudinal and transverse fluid distribution in the tissue.
  • capillary action in it can be amplified even more by adding so-called microfibres in the wet process.
  • the invention thus relates to a web having properties enabling fluid distribution and/or absorption, in which the above-mentioned limitations have been eliminated.
  • the distinguishing features of the invention are dis- closed in the accompanying claims. Due to the invention, there has now been achieved a fluid distribution and/or absorbent web, which excell ⁇ ently fulfils its purpose, while being both cheap and easy to manufacture.
  • the web made up from wet-formed fibre material in accordance with the invention has, as previously mentioned, very good properties with respect to directed fluid distribution along the fibre mate ⁇ rial, a ratio of 5:1 being obtainable for longitudinal contra transverse fluid distribution. In addition, good, i.e.
  • the inventive fibre material provides rapid fluid distribution along the channels and since channel depth is sufficient to enable rapid acceptance of liquid.
  • the wet-formed fibre material With the special fibre furnish of the web it is poss- ible, in accordance with the invention, to emboss, under heat and low pressure, the wet-formed fibre material so that longitudinal channels are formed and these keep stable in shape in a wet state also. This is a necessity for the above-mentioned fluid distribution along the channels to take place.
  • the bottoms of the channels comprise compressed fibre material of lower porosity, while the crests between the channels com ⁇ prise non-compressed fibre material of higher porosity.
  • the density and substance of the fibre material are adjusted to suit the kind of liquid that is going to distribute and/or be absorbed by the web.
  • Acquisition in an absorbent product, as well as its capacity for fluid distribution, are properties that are improved in the newly developed, inventive fibre material by using the mentioned heat-embossing process. Acquisition, which is measured inwards from the surface of a body, is the absorption rate measured as the quantity per time unit the product will accept. This means that all flow directions coact to provide acqui ⁇ sition accordinging to the invention, above all in the longitudinal (X) and inward (Z) directions in relation to the material in question.
  • Fig. 1 is a schematic, perspective view of a fluid distribution and/or absorbent web made up in accordance with the invention from tissue, paper or non-woven,
  • Fig. 2 is a fragmentary cross-section through a roll nip formed by embossing and rolls used for embossing channels into the web,
  • Fig. 3 is a schematic, perspective view of a thin, sanitary towel that includes a web in accordance with the invention
  • Fig. 4 is a partial, schematic, perspective view of a fluid distribution and/or absorbent web in an alterna ⁇ tive embodiment, where super absorbent material (SAP) is applied in strings between at least two layers of tissue material,
  • SAP super absorbent material
  • Fig. 5 is a partial, schematic, perspective view of a further alternative embodiment of the inventive web, where there are strings of SAP between at least two fibre material layers situated between single, longi- tudinal channels,
  • Fig. 6 illustrates the embodiment as in Fig. 5, but supplemented by so-called “progressive" fluid distribu ⁇ tion material
  • Fig. 7 schematically illustrates how four webs in accordance with an embodiment of the inventive web are built up according to the invention to form part of a diaper
  • Fig. 8 schematically illustrates another embodiment of the invention, where the web is formed with crests and channels at a relatively small pitch.
  • Fig. 9 illustrates an alternative embodiment of the invention similar to the one in Fig. 8, but where the crests are porous, and
  • Fig. 10 illustrates a further alternative embodiment of the invention similar to the one in Fig. 8, but where the web is supplemented by a progressive fluid distri- bution material.
  • the present inven ⁇ tion comprises a fluid distribution and/or absorbent web 1, for use in a great variety of applications, as recited in the introduction.
  • the web has a plurality of longitudinal channels 2 for directed fluid distribution and absorption of liquid deposited on it.
  • the web 1 is made up from a wet-formed tissue of cellulose fibres that are blended with a proportion of synthetic fibres. Longitudinal channels are made in the wet- formed tissue material constituting the web 1 by heat- embossing under low pressure.
  • the inventive material is manufactured according to a wet-forming process where staple fibres based on synthetic material are mixed in a percentage of between 5 and 70% to the cellulose fibres.
  • FIG. 3 An example is illustrated in Fig. 3 of a product that includes a fluid distribution and/or absorbent web in accordance with the invention.
  • the web 1 is in this case included in a thin, sanitary towel 4, which com- prises a bottom, an impermeable layer 5 and a permeable top covering layer 6, between which an inventive web 1 and a normally used absorption member 10 are arranged.
  • the former In order to eliminate sharp transitions at the web 1 and member 10 situated between layers 5 and 6 the former have flattened outer portions 3, which also taper off outwardly. This reduces discernibility of the towel in the knickers or other underwear, in which it is usually situated when in use.
  • the web 1 is made up from a wet-formed tissue of cellulose fibres, to which has been added a proportion of synthetic fibres.
  • a plurality of longitudinal channels 2 has been heat- embossed into the web, as previously mentioned, in combination or not with strings of SAP.
  • Fig. 2 there is illustrated a fragmentary cross- section through a roll nip 8, used in accordance with the invention in the production of the web 1 for heat- embossing it, which is performed with the aid of at least one roll nip 8.
  • the latter includes at least one steel roll 7 and at least one rubber roll 9.
  • Consecu ⁇ tively arranged roll nips 8 may also be arranged if required.
  • the roll or rolls 7 may have a temperature of between 110 and 200°C, and the roll or rolls 9 a tempe ⁇ rature of between 60 and 120°c
  • the nip 8 may include at least two steel rolls, i.e. the rubber roll 9 is replaced by a steel roll.
  • the web mate ⁇ rial can have a temperature of between 100 and 160°C, and its feed rate is decisive for the selection of other parameters, which together determine what desired temperature the web material has, or is given in the nip 8.
  • this tempe ⁇ rature is between 100 and 200°C, preferably 140-170°C, depending on what types of fibre are used.
  • the nip or nips 8 it is advantageous to have a linear pressure of between 2 and 50 N/mm, preferably 10-20 N/mm.
  • An ⁇ other parameter is the hardness of the rubber roll or rolls 9, and in the present example this may be between 40 and 80 Shore A.
  • em ⁇ bossing may be performed in accordance with the in- vention without supplying heat, i.e. so-called cold- embossing.
  • illu ⁇ strated in Figs. 1-3 of the web 1 in accordance with the invention has been implemented with longitudi ⁇ nal channels 2 in a zig-zag configuraton, which may of course vary considerably, e.g. a sinusoid form or rectilinear form.
  • the web 1 may also be used to advan ⁇ tage as a fluid distribution layer for absorption bodies known per se.
  • the inventive web may be provided with strings 11 of SAP for enhancing its ability to cater for distribution and absorption of the liquid in question.
  • the strings li are then suitably arranged at given spacing, and in the longitudinal direction of the channels 2.
  • the strings 11 may have a width of 2-8 mm, preferably 5 mm, and a mutual spacing of 10 mm, for example, with a tolerance of ⁇ 5 mm, and are disposed longitudinally between at least two layers 12 and 13 included in the web 1.
  • the channels are then embossed into the web at low pressure, this opera ⁇ tion resulting in that the SAP material is pressed into the interstices of the tissue material fibres.
  • the directed distribution in the web is thus amplified, while the super absorbent is better utilized.
  • the inventive web 1 Depending on the field of use and desired effect of the inventive web 1, it is possible to vary the parameters relating to type and amount of SAP in the strings 11, their pitch, and the tissue material quality and properties so that the web 1 will be adjusted to the liquid in question. To increase its acquisition the web may, of course, be perforated.
  • the web 1 includes two layers of tissue material 12, 13, which are embossed with channels 2 after strings of SAP have been put in place. It will be seen from Fig. 4 that the web 1 is provided with SAP material 11 dis ⁇ posed beneath a crest formed in the tissue material and the crest may be either porous or impermeable. The crests 2* have channels 2 on either side, each channel 2 being juxtaposed to the position occupied by SAP material, alternate crests 2* being formed without SAP material. The distance A between the SAP strings 11 is about 10 mm and their width B is between 2 and 8 mm, preferably 5 mm. In the embodiment of Fig. 5, the web 1 has the longitudinal string 11 disposed between layers 12 and 13 of tissue material, with a channel 2 on either side, but with no intermediate crest 2 1 as in Fig. 4.
  • the strings of SAP may also be implemented as cut strips of SAP film and as narrow bands or filaments they may be utilized in the web in bundles forming the strings.
  • Fig. 6 there is illustrated an alternative embodi ⁇ ment of the inventive web 1, where it may have a thick ⁇ ness outside the SAP strings of about 0,5 mm, and where it is supplemented by a so-called progressive distribu- tion material, which is made up from fibres that are coarser uppermost and finer bottommost for amplifying fluid distribution, absorbency and softness.
  • a material is intended here that may have a total thickness of about 1-2 mm, with its surface layer including fibres that are more open, due to their coarseness and interrelationship, than fibres that are finer and situated lower down in the material, as well as having closer interrelationship.
  • Fig. 7 there is illustrated an application of the inventive web when used for the core of a diaper.
  • the web is of the type illustrated in Fig. 5 and four complete layers of it are used.
  • the layers 12 and 13 of each individual web in accordance with the invention envelop between them the SAP strings 11 extending longitudinally in the web 1 with channels 2 on either side.
  • the embodiment of the inventive web 1 illustrated in Fig. 8 has relatively closely arranged channels 2 and crests 2• .
  • the widths C and D of channel and crest, respectively, are equally as great and preferably about 5 mm.
  • the embodiment of the inventive web 1 illustrated in Fig. 9 has the same appearance as the one in Fig. 8. The difference here is, however, that the channels 2 are impermeable while the crests 2' are porous. In this way there is achieved, as required for certain applica- tions, better acquisition through several layers and the channelling effect of the channels 2 for acquisi ⁇ tion through the web 1 by the liquid desposited on it.
  • fig. 10 there is illustrated an embodiment of the inventive web 1, where it is supplemented by the pro ⁇ gressive fluid distribution material 14.
  • the channels 2 are placed at relatively small mutual spacing in this case, to encourage distribution of the liquid deposited on the web 1 in the longitudinal direction of it and the channels.
  • the progressive material is provided to increase acquisition and distribution ability with the aid of the increased capillary effect.

Abstract

L'invention concerne une nappe destinée à répartir et/ou absorber des fluides et pourvue d'une pluralité de canaux assurant une répartition dirigée du liquide. Cette nappe (1) se compose d'une ou de plusieurs couches d'un matériau formé par voie humide, tel qu'un tissu, un papier ou un non tissé, et constitué de fibres de cellulose mélangées à des fibres synthétiques, les canaux longitudinaux (2) étant formés par gaufrage sous basse pression du matériau à base de fibres, formé par voie humide et constituant la nappe.
PCT/SE1996/001523 1995-11-22 1996-11-22 Corps repartitif et/ou absorbant WO1997018783A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP96940216A EP0957866A1 (fr) 1995-11-22 1996-11-22 Corps repartitif et/ou absorbant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9504164A SE9504164L (sv) 1995-11-22 1995-11-22 Anordning vid en spridarkropp
SE9504164-6 1995-11-22

Publications (2)

Publication Number Publication Date
WO1997018783A1 WO1997018783A1 (fr) 1997-05-29
WO1997018783A9 true WO1997018783A9 (fr) 1997-07-10

Family

ID=20400313

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1996/001523 WO1997018783A1 (fr) 1995-11-22 1996-11-22 Corps repartitif et/ou absorbant

Country Status (3)

Country Link
EP (1) EP0957866A1 (fr)
SE (1) SE9504164L (fr)
WO (1) WO1997018783A1 (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19732039C2 (de) * 1997-07-25 1999-09-16 Sandler C H Gmbh Flüssigkeitsverteilvlies
US6630054B1 (en) 1998-03-19 2003-10-07 Weyerhaeuser Company Methods for forming a fluted composite
AU3100999A (en) * 1998-03-19 1999-10-11 Weyerhaeuser Company Fluted composite and related absorbent articles
EP0976373A1 (fr) 1998-07-29 2000-02-02 The Procter & Gamble Company Article absorbant jetable comportant un élément pour retenir des matières fécales
EP0976375A1 (fr) 1998-07-29 2000-02-02 The Procter & Gamble Company Article absorbant à usage unique pourvu d'une couche de gestion de matières fécales
EP0976374A1 (fr) 1998-07-29 2000-02-02 The Procter & Gamble Company Article absorbant jetable comportant un élément pour retenir des matières fécales
US6749593B1 (en) 1998-08-07 2004-06-15 The Procter & Gamble Company Disposable absorbent article comprising fecal management member having fibers oriented in the z-direction
US6534149B1 (en) 1999-04-03 2003-03-18 Kimberly-Clark Worldwide, Inc. Intake/distribution material for personal care products
US6348253B1 (en) 1999-04-03 2002-02-19 Kimberly-Clark Worldwide, Inc. Sanitary pad for variable flow management
US6867346B1 (en) 1999-09-21 2005-03-15 Weyerhaeuser Company Absorbent composite having fibrous bands
GB2372231B (en) * 1999-10-01 2004-02-25 Kimberly Clark Co Fibrous creased fabrics
US6783837B1 (en) * 1999-10-01 2004-08-31 Kimberly-Clark Worldwide, Inc. Fibrous creased fabrics
JP4416431B2 (ja) * 2003-05-09 2010-02-17 株式会社リブドゥコーポレーション 使い捨て吸収性物品
DE602006010351D1 (de) * 2006-06-26 2009-12-24 Marco Maranghi Mehrschichtiges und multikomponentes Vliesmaterial mit unterschiedlicher Faserdichte und Verfahren zu dessen Herstellung
WO2010064967A1 (fr) 2008-12-04 2010-06-10 Sca Hygiene Products Ab Procédé pour former un noyau absorbant
EP3266430B1 (fr) * 2011-06-10 2020-07-01 The Procter & Gamble Company Couche coulotte jetable
EP3023084B1 (fr) 2014-11-18 2020-06-17 The Procter and Gamble Company Article absorbant et matière de distribution
US20160136013A1 (en) * 2014-11-18 2016-05-19 The Procter & Gamble Company Absorbent articles having distribution materials
US10765570B2 (en) * 2014-11-18 2020-09-08 The Procter & Gamble Company Absorbent articles having distribution materials
US10517775B2 (en) 2014-11-18 2019-12-31 The Procter & Gamble Company Absorbent articles having distribution materials
US11000428B2 (en) 2016-03-11 2021-05-11 The Procter & Gamble Company Three-dimensional substrate comprising a tissue layer

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4079739A (en) * 1976-12-27 1978-03-21 Kimberly-Clark Corporation Die-cut contoured catamenial napkin of multi-layered construction
KR830002836B1 (ko) * 1979-10-22 1983-12-27 킴버리-크라아크 코오포레이션 분비물 흡수체
US4795455A (en) * 1987-08-31 1989-01-03 Personal Products Company Sanitary napkin pad liner
US5383869A (en) * 1988-03-31 1995-01-24 The Procter & Gamble Company Thin, flexible sanitary napkin
EP0373974A3 (fr) * 1988-12-15 1990-09-05 Fiberweb North America, Inc. Procédé de préparation d'une étoffe non tissée fortement absorbante

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