WO2009062998A1 - Matériau perforé et traité - Google Patents

Matériau perforé et traité Download PDF

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Publication number
WO2009062998A1
WO2009062998A1 PCT/EP2008/065455 EP2008065455W WO2009062998A1 WO 2009062998 A1 WO2009062998 A1 WO 2009062998A1 EP 2008065455 W EP2008065455 W EP 2008065455W WO 2009062998 A1 WO2009062998 A1 WO 2009062998A1
Authority
WO
WIPO (PCT)
Prior art keywords
holes
hydrophobic
substrate according
woven fabric
perforated substrate
Prior art date
Application number
PCT/EP2008/065455
Other languages
English (en)
Inventor
Fabio Di Berardino
Xavier Conillera Trillas
Robert Garcia Pano
Original Assignee
Tesalca-99, S.A.
Texol, S.R.L.
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 Tesalca-99, S.A., Texol, S.R.L. filed Critical Tesalca-99, S.A.
Publication of WO2009062998A1 publication Critical patent/WO2009062998A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/24—Perforating by needles or pins
    • 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
    • A61F13/51—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 outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/512—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations
    • A61F13/5123—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations the apertures being formed on a multilayer top sheet
    • 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
    • A61F13/51—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 outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/513—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability
    • A61F13/51305—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability having areas of different permeability
    • 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
    • A61F13/51—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 outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/512—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations

Definitions

  • the object of this invention is to develop perforated materials that can be incorporated in absorbent hygienic products (such as baby diapers, adult incontinence diapers and women's personal hygiene products) with improved properties with respect to existing perforated materials regarding their hygienic properties (dryness, transfer time, rewet and/or runoff) and softness.
  • absorbent hygienic products such as baby diapers, adult incontinence diapers and women's personal hygiene products
  • hygienic properties dryness, transfer time, rewet and/or runoff
  • the object of this patent is the method used to manufacture these perforated materials and for deep embossing.
  • Another object of the patent is the incorporation of these materials in hygienic absorbent products, such as baby diapers, adult incontinence diapers and women's personal hygiene products.
  • US Patent 4,886,632 describes a method for perforating a non-woven fabric web and the use of these webs as topsheet in feminine hygiene products. This invention foresees the incorporation of heated pins that penetrate the non-woven fabric web to make the corresponding holes, their heat melting the edges of the holes.
  • US Patent 6,849,319 relates to an absorbing item formed by a backsheet structure, an absorbent core and a topsheet in contact with the user's body, wherein the topsheet is multi-perforated, the topsheet being a simple non-woven fabric that separates the absorbent core from the user's body.
  • Patent EP 235,309 describes a perforated product that combines hydrophilic and hydrophobic properties to try to improve liquid transfer performance.
  • US Patent 7,005,558 describes a perforated fibrous material in which the edge of the holes is impermeable to liquids as the material in this area has been fused to create this impermeable barrier.
  • This type of solution can present softness problems when used as a topsheet, as the fused areas are hardened and represent a significant loss of softness.
  • Patent EP 214,608 describes a material perforated by hot pins, in which the fibres are densified in the areas of the holes, thereby avoiding the softness problems suffered by the previously cited patent.
  • the present invention consists of a perforated material in which the material adjacent to the holes and forming their walls is treated with a surfactant to create a surface tension gradient in the holes.
  • This material can be a non-woven fabric, a film or a laminate combining a film and a non-woven fabric.
  • the non-woven fabric can be a carding, a spunbond, a combination of spunbond and meltblown, airlaid or any other type of non-woven fabric.
  • the use of additives to convert a hydrophobic material into a hydrophilic one is known by the expert on the subject.
  • a known way of obtaining textiles that have hydrophilic properties instead of hydrophobic ones is by treatments with surfactants.
  • Suitable conventional additives include, ionic surfactants, cationic surfactants, amphoteric surfactants or mixtures of the same which are commercially available, for example: Cirrasol PP682 marketed by Uniqema, Stantex S 6327 marketed by Cognis, Silastol PST marketed by Schill & Seilacher, Silwet L-7608 marketed by Momentive Performance Materials.
  • melt additives commonly used for example in films.
  • the commercial melt additives used are for example 100410 AF PE MB marketed by Ampacet, lrgasuf HL560 marketed by Ciba Speciality Chemicals Inc., Hydrosorb 1001 marketed by Goulston Technologies Inc.
  • the invention relates to a material that can be a non-woven fabric, a film or the combination thereof (hereinafter referred to as a "laminate").
  • the non-woven fabric comprises a perforated substrate of fibres that can be continuous, such as for example (without being limited to) spunbond or SMS (spunbond-meltblown- spunbond), or discontinuous, such as carding or airlaid.
  • the fibres can have a circular cross-section or other shapes including multilobal, trilobal, delta, hollow, etc. In addition, they can be monocomponent
  • PLA e.g., bicomponent (e.g. combination of polypropylene and polyethylene) or multicomponent.
  • the film can be made of polypropylene, polyethylene, or a combination thereof, including other polymers such as polyester and biopolymers.
  • the present invention proposes the use of perforated hydrophobic materials in which the surface of the fibres forming the walls of the holes is selectively treated with surfactant.
  • the hydrophilic fibres may comprise (see Figure 1 ) the total wall of the holes, (from the top to the bottom) (a), or only a partial area, that means the bottom (b), a central area (c) or the top area (d).
  • the holes are not limited to circular, nearly circular or oval shape.
  • the object of the invention is also valid for any other hole shape.
  • Y The shortest distance, when this distance is a straight line passing through the centre of the hole in a perpendicular plane to the axis of the hole, which separates two points comprising hydrophilic fibres arranged around the same hole.
  • Z The greatest distance, when this distance is a straight line passing through the centre of the hole in a perpendicular plane to the axis of the hole, which separates two points comprising hydrophilic fibres arranged around the same hole.
  • the creation of the surface tension gradient in the holes proposed by this invention is particularly advantageous, as it aids the passage of liquid through the holes, preventing diffusion by capillary action towards the rest of the fabric as the latter is hydrophobic.
  • hydrophobic material will give a further advantage in terms of dryness compared to the hydrophilic ones.
  • This further advantage could be shown by measuring the Transepidermal Water loss (TEWL).
  • TEWL Transepidermal Water loss
  • the TEWL measurement is a common method used to determine skin hydratation in hygiene products as can be seen in patents such as US Patent 6,107,537 or US 7,037,1 12.
  • the object of the invention is a material such as those described above wherein instead of being perforated the material has a deep embossing and is manufactured according to any of the procedures described in the state of the art, with the characteristic that the deep areas simulating holes are treated with a surfactant to aid a selective passage of liquids.
  • the object of the invention as stated throughout the description is appropriate for manufacturing hygienic items such as baby diapers, adult incontinence diapers, feminine hygiene products such as pads or any similar absorbent product.
  • the material can be used as a liquid capture layer under a topsheet, as topsheet, or as a joint topsheet and liquid capture layer.
  • a preferred method for the production of the perforated materials of the invention comprising the following steps:
  • the perforated material sheet remains in contact with the pins of the drum roll up to a phase of separation from the pins due to the action of a vacuum roll (7); in addition said vacuum roll enables the removal of the excess amount of surfactant applied by the perforating pins.
  • the perforated material sheet (8) is then driven onto a cooling unit (9) which provides surfactant fixing onto the walls of the holes of the perforations; said cooling unit also provides the stabilization of the pattern of the holes so- obtained
  • the surfactant can be applied only to the bottom area of the walls of the holes of the perforated material, to the central area of the walls or to the top of the walls.
  • the absorption capacity of the absorbent core is a critical parameter in hygiene products.
  • Denier is a usual measure used in the non-woven fabric sector to size the diameter of fibres. It is defined as the weight in grams of 9.000 meters of fibre.
  • Example 1 Non-woven fabric spunbond of polypropylene with basis weight 20 gsm (gsm means "grams per square meter”), fibres with a circular cross section with diameter 1 ,9 denier, perforated with 1 1 holes/cm 2 , hole size 1 ,2 mm 2 , open surface of 13%, three-dimensional holes and 0,45 mm material thickness.
  • the holes were hydrophilised using the impregnated roller method explained in this invention.
  • the hydrophilising agent used was the surfactant Silastol- PST manufactured by Schill & Seilacher, in a concentration by weight of perforated product of 0,3%.
  • the following table shows the results of the hygienic tests (strike through time, rewet and run-off):
  • the table shows that the hydrophobic material presents a slightly lower rewet value but has higher run-off and strike through time values, which renders its use in a hygienic product inadvisable.
  • the material described in the present invention would allow the use of a hydrophobic material with a performance combining the strike through time and runoff value of a hydrophilic material with a satisfactory rewet value.
  • Example 2 Laminated material with total basis weight 40 gsm made by a layer of polyethylene film (20 gsm) and polypropylene spunbond (20 gsm), perforated with 1 1 holes/cm 2 , hole size 1 ,9 mm 2 , open surface of 21 %, with three-dimensional holes and 0,92 mm material thickness.
  • the polyethylene film has been extruded with a mixture of hydrophilic additive, (as is well known in the state of the art), while the spunbond is untreated and is thus hydrophobic.
  • the hydrophilic additive used was 100410 AF PE MB marketed by Ampacet at 2,5%.
  • Lamination was performed by the coextrusion process (extrusion of the film on the non-woven fabric) and no glue was used to join the materials.
  • Test method REWET (WSP 80.10(05))
  • Data unit Grams
  • the same material was treated according to the present invention, hydrophilising the holes with the impregnated roller method described in the present invention.
  • the hydrophilising agent used was the surfactant Silastol-PST manufactured by Schill & Seilacher in a concentration by weight of laminated product of 0,4%.
  • the following table shows the results, revealing a very significant improvement in terms of strike through and run-off while keeping low rewet values.
  • Test method REWET (WSP 80.10(05))
  • Data unit Grams
  • Example 3 Laminated material with total basis weight 25 gsm formed by a layer of polyethylene film (13 gsm) and polypropylene spunbond (12 gsm), perforated with 1 1 holes/cm 2 , hole size 1 ,6 mm 2 , open surface of 18%, three-dimensional holes and 0,63 mm material thickness. Both the polyethylene film and the polypropylene spunbond are hydrophobic, as they have not been treated. Lamination was performed by the coextrusion method (extrusion of the film on the non-woven fabric) without using glues to join the materials.
  • Test method REWET (WSP 80.10(05))
  • Data unit Grams
  • the same material was treated according to the present invention, hydrophilising the holes with the impregnated roller method described in the present invention.
  • the hydrophilising agent used was the surfactant Silastol-PST manufactured by Schill & Seilacher in a concentration by weight of laminated product of 0,26%.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

La présente invention porte sur un matériau perforé, et sur un procédé de fabrication de celui-ci, dans lequel le matériau adjacent aux trous et formant leurs parois est traité avec un tensioactif pour créer un gradient de tension de surface dans les trous. Ledit matériau perforé peut être incorporé dans des produits hygiéniques absorbants, tels que des couches pour bébés, des couches d'incontinence pour adultes et des produits d'hygiène personnelle pour femmes.
PCT/EP2008/065455 2007-11-13 2008-11-13 Matériau perforé et traité WO2009062998A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US98763507P 2007-11-13 2007-11-13
US60/987,635 2007-11-13

Publications (1)

Publication Number Publication Date
WO2009062998A1 true WO2009062998A1 (fr) 2009-05-22

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Family Applications (1)

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PCT/EP2008/065455 WO2009062998A1 (fr) 2007-11-13 2008-11-13 Matériau perforé et traité

Country Status (1)

Country Link
WO (1) WO2009062998A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013114231A1 (fr) * 2012-01-31 2013-08-08 Kimberly-Clark Worldwide, Inc. Ouvertures traitées
US9161868B2 (en) 2009-09-04 2015-10-20 Kimberly-Clark Worldwide, Inc. Removal of colored substances from aqueous liquids
US9161869B2 (en) 2012-03-30 2015-10-20 Kimberly-Clark Worldwide, Inc. Absorbent articles with decolorizing agents
US9237975B2 (en) 2013-09-27 2016-01-19 Kimberly-Clark Worldwide, Inc. Absorbent article with side barriers and decolorizing agents
WO2018048845A1 (fr) * 2016-09-09 2018-03-15 The Procter & Gamble Company Substrats perforés tridimensionnels
WO2018049108A1 (fr) * 2016-09-09 2018-03-15 The Procter & Gamble Company Systèmes et procédés d'application de compositions sur des bandes continues et bandes continues en résultant
US10973702B2 (en) 2015-08-26 2021-04-13 The Procter & Gamble Company Absorbent articles having three dimensional substrates and indicia
US11033440B2 (en) 2014-03-06 2021-06-15 The Procter & Gamble Company Three-dimensional substrates
US11202723B2 (en) 2016-07-01 2021-12-21 The Procter & Gamble Company Absorbent articles with improved topsheet dryness
US11730639B2 (en) 2018-08-03 2023-08-22 The Procter & Gamble Company Webs with compositions thereon
US11813148B2 (en) 2018-08-03 2023-11-14 The Procter And Gamble Company Webs with compositions applied thereto

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0214608A2 (fr) * 1985-09-09 1987-03-18 Kimberly-Clark Corporation Etoffe non-tissée comportant des ouvertures
WO1997040793A1 (fr) * 1996-05-02 1997-11-06 Sca Hygiene Products Ab Feuille de couverture ajouree pour article absorbant et procede de production de cette feuille
WO2000000231A1 (fr) * 1998-06-30 2000-01-06 Kimberly-Clark Worldwide, Inc. Film de couverture a mouillabilite localisee et son procede de fabrication
DE19846857C1 (de) * 1998-10-12 2000-03-02 Freudenberg Carl Fa Perforierter Vliesstoff und Verfahren zu dessen Herstellung
US20030124311A1 (en) * 2001-12-03 2003-07-03 Cree James W. Apertured nonwoven composites and method for making
US20030121380A1 (en) * 2001-11-30 2003-07-03 Cowell Christine M. System for aperturing and coaperturing webs and web assemblies
EP1911577A1 (fr) * 2006-10-13 2008-04-16 Tredegar Film Products Corporation Film formé à sec

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0214608A2 (fr) * 1985-09-09 1987-03-18 Kimberly-Clark Corporation Etoffe non-tissée comportant des ouvertures
WO1997040793A1 (fr) * 1996-05-02 1997-11-06 Sca Hygiene Products Ab Feuille de couverture ajouree pour article absorbant et procede de production de cette feuille
WO2000000231A1 (fr) * 1998-06-30 2000-01-06 Kimberly-Clark Worldwide, Inc. Film de couverture a mouillabilite localisee et son procede de fabrication
DE19846857C1 (de) * 1998-10-12 2000-03-02 Freudenberg Carl Fa Perforierter Vliesstoff und Verfahren zu dessen Herstellung
US20030121380A1 (en) * 2001-11-30 2003-07-03 Cowell Christine M. System for aperturing and coaperturing webs and web assemblies
US20030124311A1 (en) * 2001-12-03 2003-07-03 Cree James W. Apertured nonwoven composites and method for making
EP1911577A1 (fr) * 2006-10-13 2008-04-16 Tredegar Film Products Corporation Film formé à sec

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9161868B2 (en) 2009-09-04 2015-10-20 Kimberly-Clark Worldwide, Inc. Removal of colored substances from aqueous liquids
AU2013213905B2 (en) * 2012-01-31 2016-06-09 Kimberly-Clark Worldwide, Inc. Treated apertures
CN104080447A (zh) * 2012-01-31 2014-10-01 金伯利-克拉克环球有限公司 经处理的开孔
GB2513074A (en) * 2012-01-31 2014-10-15 Kimberly Clark Co Treated apertures
GB2513074B (en) * 2012-01-31 2020-05-06 Kimberly Clark Co Treated apertures
WO2013114231A1 (fr) * 2012-01-31 2013-08-08 Kimberly-Clark Worldwide, Inc. Ouvertures traitées
US9237973B2 (en) 2012-01-31 2016-01-19 Kimberly-Clark Worldwide, Inc. Treated apertures
US9220646B2 (en) 2012-03-30 2015-12-29 Kimberly-Clark Worldwide, Inc. Absorbent articles with improved stain decolorization
US9161869B2 (en) 2012-03-30 2015-10-20 Kimberly-Clark Worldwide, Inc. Absorbent articles with decolorizing agents
US9283127B2 (en) 2012-03-30 2016-03-15 Kimberly-Clark Worldwide, Inc. Absorbent articles with decolorizing structures
US9237975B2 (en) 2013-09-27 2016-01-19 Kimberly-Clark Worldwide, Inc. Absorbent article with side barriers and decolorizing agents
US11033440B2 (en) 2014-03-06 2021-06-15 The Procter & Gamble Company Three-dimensional substrates
US10973702B2 (en) 2015-08-26 2021-04-13 The Procter & Gamble Company Absorbent articles having three dimensional substrates and indicia
US11202723B2 (en) 2016-07-01 2021-12-21 The Procter & Gamble Company Absorbent articles with improved topsheet dryness
US20180071156A1 (en) * 2016-09-09 2018-03-15 The Procter & Gamble Company Three-Dimensional Apertured Substrates
CN109562005A (zh) * 2016-09-09 2019-04-02 宝洁公司 三维开孔基底
CN109562006A (zh) * 2016-09-09 2019-04-02 宝洁公司 将组合物施加于纤维网的系统和方法及其纤维网
WO2018049108A1 (fr) * 2016-09-09 2018-03-15 The Procter & Gamble Company Systèmes et procédés d'application de compositions sur des bandes continues et bandes continues en résultant
WO2018048845A1 (fr) * 2016-09-09 2018-03-15 The Procter & Gamble Company Substrats perforés tridimensionnels
CN114848301A (zh) * 2016-09-09 2022-08-05 宝洁公司 将组合物施加于纤维网的系统和方法及其纤维网
JP7136768B2 (ja) 2016-09-09 2022-09-13 ザ プロクター アンド ギャンブル カンパニー 三次元有孔基材
US11730639B2 (en) 2018-08-03 2023-08-22 The Procter & Gamble Company Webs with compositions thereon
US11813148B2 (en) 2018-08-03 2023-11-14 The Procter And Gamble Company Webs with compositions applied thereto

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