WO2013167179A1 - Ensemble couverture extérieure et article absorbant jetable - Google Patents

Ensemble couverture extérieure et article absorbant jetable Download PDF

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Publication number
WO2013167179A1
WO2013167179A1 PCT/EP2012/058526 EP2012058526W WO2013167179A1 WO 2013167179 A1 WO2013167179 A1 WO 2013167179A1 EP 2012058526 W EP2012058526 W EP 2012058526W WO 2013167179 A1 WO2013167179 A1 WO 2013167179A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
graphic
outer cover
cover assembly
opening
Prior art date
Application number
PCT/EP2012/058526
Other languages
English (en)
Inventor
Rodrigo PASQUALE
Fernando SPINELLI
Original Assignee
Sca Hygiene Products Ab
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 Sca Hygiene Products Ab filed Critical Sca Hygiene Products Ab
Priority to JP2015510656A priority Critical patent/JP6092370B2/ja
Priority to IN9700DEN2014 priority patent/IN2014DN09700A/en
Priority to MX2014013027A priority patent/MX341238B/es
Priority to CN201280073040.8A priority patent/CN104271098B/zh
Priority to PCT/EP2012/058526 priority patent/WO2013167179A1/fr
Publication of WO2013167179A1 publication Critical patent/WO2013167179A1/fr

Links

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
    • A61F13/51—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
    • A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from the skin
    • A61F13/51456—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its properties
    • A61F13/51458—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its properties being air-pervious or breathable
    • A61F13/5146—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its properties being air-pervious or breathable having apertures of perforations
    • 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
    • A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from the skin
    • A61F13/51474—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its structure
    • A61F13/51478—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its structure being a laminate, e.g. multi-layered or with several layers
    • A61F13/5148—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its structure being a laminate, e.g. multi-layered or with several layers having an impervious inner layer and a cloth-like outer 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
    • A61F13/51—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
    • A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from the skin
    • A61F13/51474—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its structure
    • A61F13/51484—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its structure being inhomogeneous in the plane of the sheet, i.e. having zones of different properties or structures
    • 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
    • A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from the skin
    • A61F13/51496—Backsheet, i.e. the impermeable cover or layer furthest from the skin having visual effects
    • 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
    • A61F13/84—Accessories, not otherwise provided for, for absorbent pads
    • A61F2013/8497—Accessories, not otherwise provided for, for absorbent pads having decorations or indicia means

Definitions

  • the present invention pertains to an outer cover assembly for a disposable absorbent article which is provided with a graphic. Additionally, the present invention pertains to a disposable absorbent article, such as a diaper, incontinence pants or sanitary napkin, having an outer cover assembly which is provided with a graphic .
  • Such disposable absorbent articles are articles which are worn adjacent the body, and used for the containment and absorption of bodily exudates, such as urine, blood, faeces and sweat.
  • a typical disposable absorbent article comprises an absorbent core disposed between an inner topsheet , adapted to face and typically to contact the user's skin, and an outer cover layer for inhibiting liquid waste absorbed by the absorbent core from leaking out of the article
  • the inner topsheet of the absorbent article is typically liquid permeable to permit body waste to pass through for absorption by the absorbent core .
  • Multi- component outer covers are also commonly termed backsheets or outer cover assemblies .
  • an outer cover assembly can be provided that is highly functional with respect to softness, textile -likeness , liquid- impermeability and breathability etc. Accordingly, disposable absorbent articles of this kind are nowadays highly complex products and are made up of a large number of components that have to be handled and assembled at high speeds in a production process.
  • multi -component outer covers it has often been an aim to include printed graphics, such as letters, character images, and/or numbers or the like, which are visible from outside the article.
  • printed graphics such as letters, character images, and/or numbers or the like
  • the diapers become more aesthetically pleasing for the user and also more underwear -like
  • the graphics may also provide visual assistance to the user or to a caregiver securing the article on the user.
  • the presence of various materials and layers in multi - component outer covers makes it difficult to display printed graphics in a clear and vibrant manner, so that they may be easily visually discerned.
  • a backsheet having a film layer and an outer layer.
  • the film layer is provided with a different colour frem the outer layer of the backsheet , and the outer layer is further rendered transparent in certain areas. This allows the colour of the film to be visible through the transparent areas of the outer layer.
  • the transparent areas of the outer layer are obtained by subjecting corresponding areas of an opaque nonwoven layer to heat and pressure so that the fibres in these areas melt and form a film- like structure.
  • EP 1 738 729 discloses an outer cover laminate having a first film layer with indicia, a second layer, preferably being a non-woven layer, and a third layer, preferably also being a non- oven layer.
  • the third layer acts as a landing zone and is smaller than the second layer.
  • both nonwoven layers are adapted to enhance the visibility of the indicia on the film material by being sufficiently translucent in combination.
  • EP 1 078 620 and US 7 214 849 disclose alternative solutions on how to enhance the visibility of the graphics. These documents disclose absorbent articles which have an additional printed sheet sandwiched between two layers. The additional printed sheet is preferably smaller than the outer layer, which makes it possible to form the printed sheet at low cost .
  • JP-A- 2002-272783 discloses a diaper having an outer assembly with two nonwoven layers and elastic members disposed therebetween. Further, a pattern or graphic can be provided on a backsheet arranged on the inner side of the outer assembly and this graphic is intended to be seen through the two nonwoven layers . However, in such arrangements the visibility of the graphic tends to be impaired.
  • US 2005/0131366 Al discloses an absorbent article having a decorative element or graphic.
  • a liquid barrier sheet provided on its outer surface with a decorative element and an outer sheet covering the liquid barrier- sheet .
  • the outer sheet is provided with an optical transmittance that permits the decorati e element to be seen through the outer sheet .
  • two outer sheets can be provided , and the liquid barrier sheet is provided either beneath both or between the two outer sheets .
  • the entire outer sheet must be formed to have the appropriat e optical transmittance, which may materially impact on other required properties of the layers .
  • EP 1 179 330 A2 discloses a laminate for a disposable diaper comprising two outer sheets and elastic membe s provided therebetween .
  • a graphical design can be provided, possibly on a label or the 1 ike , and the area on which the combined, laminated web is provided with the graphical design can be made non- elastic to avoid wrinkling in that area .
  • EP 1 452 157 Al discloses an exterior laminate that forms the outer surface of an absorbent article.
  • the exterior laminate comprises an outer sheet, an inner sheet and a plurality of elastic members arranged between these two sheets, A portion of the elastic members is made inelastic and a pattern sheet with a pattern or graphic is inserted between the outer sheet and the inner sheet to cover the region of the elastic members which has been made inelastic.
  • the outer sheet is such that the pattern sheet can be seen through it from the outside, or alternatively the backsheet of the absorbent body is omitted and the pattern sheet is made liquid impermeable and extends along the entire longitudinal axis of the diaper to act as a backsheet.
  • the pattern sheet must be on the outside, or the entire outer sheet must be sufficiently translucent to permit the graphic to be visible. In either case, a compromise must be made with visibility of the graphic and the other required properties of the backsheet .
  • the present invention relates to an outer cover assembly for a disposable absorbent article.
  • the outer cover assembly extends in a longitudinal direction Y, a transverse direction X and a thickness direction Z extending perpendicular to the longitudinal direction Y and the transverse direction .
  • the outer cover assembly comprises at least a first r.onwoven layer, a second intermediate layer and an inner liquid- impermeable film layer layered in this order in the thickness direction.
  • the inner liquid- impermeable film layer will be located closer to the user in the thickness direction Z than the at least first nonwoven layer and second intermediate layer.
  • the inner liquid- impermeable film layer is provided on its side facing the second intermediate layer with a graphic, and the graphic has an extension in the longitudinal direction Y and the transverse direction X, Furthermore , either the first nonwoven layer or second intermediate layer is provided with an opening in the area of the graphic, the opening extending in the longitudinal direction Y and the transverse direction Xand over at least a part of the graphic, i.e. such that the at least part of the graphic is not covered at that location by the layer provided with the opening .
  • the other layer of the first nonwoven layer and the second intermediate layer without the opening has an optical transmi1.1ance at least in the area covering the at least part of the graphic such that the at least part of the graphic is visible through the other layer.
  • opening refers to an open area circumscribed by ei ther the first nonwoven layer or the second intermediate layer.
  • the extension of the opening is essentially in the longitudinal direction Y and the transverse direction X.
  • the thickness of the layer can therefore be ignored in terms of the extension of the opening area, since inevitably all materials have a thickness, which is ultimately dependent on the material itself .
  • the shape of the opening may be in any suitable form. Pr ferably, the shape takes the form of a square, rectangular, circle or triangle.
  • layer or "web” as used herein is a generally two- dimensional structure that may comprise one or more plies and may be in the form of a laminate made from plies of the same material or different materials.
  • a nonwoven web or nonwoven layer or nonwoven laminate layer may comprise a multitude of plies or nonwo en plies.
  • the outer sheet 21 For securing clear see -through visibility of the pattern from the outside and user- attractive appearance, it is preferred for the outer sheet 21 to have an optical transmittance of 55% or higher, more preferably 65% or higher, most preferably 75% or higher. The see -through visibility of the pattern reduces with a decrease in optical transmittance .
  • optical transmittance is defined to be the total luminous transmittance as measured according to ASTM Standard D 1003, Procedure A ("Hazemeter" ⁇ , employing C1E Standard Illuminant A in the measurement, which standard is well-known to those skilled in the art. Measurement is made on arbitrarily selected 10 points of a sample sheet to obtain an average.
  • the total transmittance of nonwove fabric hardly varies depending on the process of fabrication and is rather governed by the basis weight.
  • a preferred basis weight for obtaining high total transmittance is
  • a preferred basis weight of nonwoven fabric used as an outer sheet is
  • graphics may refer, but is not limited, to an image, a design, a pattern, symbology, indicia, or the like.
  • Graphic also includes one or more single coloured patterns and/or multicoloured patterns which occupy a certain area of the outer cover assembly.
  • coloured may refer to a status of non-white.
  • That part of the graphic is consequently covered by fewer material layers than, for instance, other parts of the film material, and the graphic becomes more vivid and vibrant .
  • the opening allows the graphic to be exposed such that the graphic becomes more visible from the outside of the outer cover assembly.
  • the outer cover assembly can be provided with more accurately defined graphics, whose qualities are less dependent on the complex product structure.
  • Embodiments of the present invention therefore provide a less expensive and more, environmentally responsible technical solution as compared with prior art solutions using an additional printed sheet, since embodiments of the invention make use of the existing layers of the outer cover assembly rather than requiring a supplementary sheet.
  • any of the layers which do not form the opening covers at least a part of the graphic.
  • the graphic is provided with a protective layer and is less exposed to physical impacts, such as dust, unintentional contact with other articles when the articles are packaged face to face, contact with underwear during use, or other physical tearing that may destroy the quality of the graphic.
  • the vivid and vibrant aspects of the graphic are maintained for a longer time.
  • any of the layers which does not form the opening covers at least a part of the opening.
  • the edges defining the opening are covered by an additional layer so as to ensure that the edges are not damaged or do not come apart .
  • the second intermediate layer may comprise a nonwoven material.
  • a nonwoven material layer By means of using a nonwoven material layer, the outer cover assembly becomes even softer . In addition, the cloth-like feel of the article is enhanced .
  • the first nonwoven layer or the second intermediate layer when it is the other layer without the opening, may have a basis weight of 5 to 40 g/m 2 , preferably 8 to 30 g/nf .
  • a high degree of nonwoven layer opacity indicates a high degree of obscuring a graphic behind it.
  • other properties of the material may affect the opacity, such as material density, thickness and the degree and type of pigmentation used ⁇ e.g. titanium dioxide, Ti02).
  • a nonwoven layer with a basis weight in the range of 5 to 40 g/m 2 will have a satisfactory opacity in terms of providing visibility of the graphic and good layer strength.
  • the advantage of selecting a nonwoven layer having a basis weight within the above preferred range of 8 to 30 g/m 2 is that an even better balance is kept between the opacity and the strength of the material.
  • An acceptable degree of strength is critical since a thin material has a tendency to tear apart if it is used in an outer cover assembly. This is due to the fact that the outer cover assembly may be subjected to pulling forces when the user is putting the article on. This is particularly relevant if the outer cover assembly is used in a pull-on diaper or a pant -type disposable absorbent article.
  • the opening extends in the longitudinal direction Y and the transverse direction X over the entirety of the graphic. This allows the complete graphic to be as vivid and vibrant as possible. This aspect of the invention may be important when the graphic (s) should be harmonized, e.g. when the assembly is provided with a large graphic or several minor graphics that together communicate a message to the user or the caregiver.
  • the outer cover assembly may further comprise body elastic.
  • the body elastic is applied between the first nonwoven layer and the second intermediate layer, such that the outer cover assembly is elasticated.
  • the body elastic may be configured in the region of the opening so as not to cause the region of the inner layer provided with the graphic to become wrinkled
  • the inner liquid-impermeable film layer may comprise an elastic film material, such that the outer cover assembly is elasticated.
  • the first and second layers are continuous layers.
  • Continuous layers here, are layers which are formed as a continuous web.
  • the opening is obtained by a removal of an opening material portion of any of the first and second continuous layers.
  • the outer cover assembly can be manufactured in an efficient manner. Further, by removal of a material portion from a continuous layer, it is possible to make the inventive outer cover assembly only by minor adaptations to an existing manufacturing process. Manuf cturers can therefore utilize their existing processes without making extensive technical changes to the process sequence or sequences . The only additional requirement is the implementation of a manufacturing step which allows a portion of the layer to be removed. Hence, it is possible to avoid costly and/or complicated manufacturing solutions, and the outer cover assembly, as well as the article itself, can continue to be handled and assembled at high speeds .
  • the opening material portion of any of the layers may be removed by cutting.
  • the first nonwoven layer or the second intermediate layer when provided with the opening, may comprise at least a first piece of material and a second piece of material.
  • the first piece of material may be arranged relative to the second piece of material such as to define at least a portion of the opening therebetween.
  • This aspect of the invention is particularly beneficial when the opening is shaped as a square or a rectangle. The square- or rectangle- shaped opening is simply formed by arranging two rectangular shaped pieces of material with a distance therebetween.
  • the second intermediate layer is arranged closer to the inner liquid- impermeable film layer than the first nonwoven layer, in the thickness direction Z.
  • the opening may be formed in the second intermediate layer.
  • the technical advantage of the above is that the opening and the graphic is covered by the first nonwoven layer. Moreover, when laminating the outer cover assembly, it makes it possible to more accurately synchronize the position of the opening with the graphic as the film layer and the layer with the opening are close to each other.
  • the first nonwoven layer is arranged externally of the second intermediate layer, in the thickness direction Z. In an alternative aspect of the invention, the opening may be formed in the first exterior nonwoven layer.
  • the overall outer surface of the outer cover assembly is provided with different surface structures that may itself enhance the attractiveness of the outer cover assembly or the article.
  • the opening may define a window around the graphic which can have a positive impact on the communication of the graphic to the user, e.g. it may be easier for the user to find the graphic since it is surrounded by a distinct window, i.e. the edges of the opening.
  • the present inventions also relates to a disposable absorbent article, such as a diaper, incontinence pant or sanitary napkin.
  • the disposable absorbent article comprises an outer cover assembly according to any one of the aspects as mentioned above.
  • the article may have an inner surface facing the user during use and an outer surface facing away from the user during use. Further, the article may comprise a topsheet , which may form the inner surface , the outer cover assembly forming the outer surface, and optionally an absorbent core disposed between the topsheet and the outer cover assembly .
  • the inner liquid-impermeable film layer of the outer cover assembly is arranged closer to t e absorbent core in the thickness direction Z than the at least first nonwoven layer and the second intermediate layer .
  • the disposable absorbent article may fu ther comprise , as seen in the longitudinal direction ⁇ , a front portion, a rear portion and an intermediate crotch portion provided with two leg openings.
  • the crotch portion extends between the front portion and the rear portion in the longitudinal direction Y of the article and is joined to the front and rear portions.
  • the outer longitudinal edge portions of the front portion may be connected by longitudinal side seams to the outer longitudinal edge portions of the rear portion .
  • either the first, nonwoven layer or the second, intermediate layer is further provided with a further graphic and a further opening extending in the area of the further graphic in the longitudinal direction ⁇ Y) and the transverse direction (X) and over at least a part of the further graphic and that the other layer of the first, nonwoven layer and the second, intermediate layer without the further opening has an optical transmittance at least in the area covering the at least part of the further graphic such that the at least part of the further graphic is visible through the other layer .
  • the further graphic and the further opening are positioned so as to be on the same one of a front surface or a rear surface of the article, when worn.
  • the further graphic and the further opening are positioned so as to be on different ones of a front surface or a rear surface of the article, when worn.
  • a further nonwoven layer is positioned between the second, intermediate layer and the first, nonwoven layer to cover the at least part of the graphic; and at least one of the first, nonwoven layer and the further nonwoven layer does not extend to cover the intermediate crotch portion of the article.
  • Figures la and lb show a disposable absorbent article being an embodiment of the present invention ;
  • Figures 2a, 2b, 2c and 2d show a sequence of laminated layers building up an outer cover assembly being an embodiment of the present invention ;
  • Figures 3a, 3b and 3c show a sequence of laminated layers building up an outer cover assembly being another embodiment of the present invention ;
  • Figures 4a, 4b and 4c show a sequence of laminated layers building up an outer cover assembly being a further embodiment of the present invention ;
  • Figure 5 shows a continuous manufacturing process suitable for the production of embodiments of the present invention .
  • the present invention may as well be implemented in an open diaper, i.e. a diaper to be closed by means of a fastening means.
  • the present invention may as well be incorporated in incontinence guards and sanitary napkins.
  • "absorbent article” therefore means any article that can absorb body fluids and is suitable to be placed in close proximity to the genitals and/or anus of the user.
  • Figure la of the drawings shows an embodiment of a disposable absorbent article in the form of a diaper for an infant or an incontinent adult.
  • the diaper is intended to be worn around the waist of the wearer like a pair of pants.
  • the absorbent article 10 comprises an outer cover assembly 20 having a front portion 150 which in the embodiment shown in the drawings in use is intended to extend over the stomach of the wearer.
  • the outer cover assembly also comprises a rear portion 160, which in the shown embodiment is the part of the outer cover assembly that in use is intended to extend over the back of the wearer.
  • the article has a longitudinal direction y and a lateral transverse direction x.
  • the absorbent article as shown in Figure la may further be symmetric about a longitudinal center axis L .
  • the article may be formed by the folding of a laminar structure, for example as shown in Figures lb and lc.
  • Longitudinal side seams 180 and 180 f are formed along the laterally outermost margins of the front and rear portions 150 and 160 to thereby create a closed pants -type diaper, i.e. a unitary article having a waist opening and a pair of leg openings.
  • the side seams can be formed in a variety of ways known in the art, such as ultrasonic welding, adhesive or a combination thereof.
  • One or both side seams may further be openable and refastenable , wherein they are formed by mechanical fasteners or adhesive tape.
  • the front and rear portions may be joined via a pair of elastic side panels.
  • An intermediate crotch portion 170 which is normally a part of the other cover assembly, is the part of the article that in use is intended to extend through the wearer's crotch area between the legs.
  • An absorbent core is optionally disposed in the crotch portion 170 and extends into the front and rear portions 150 and 160.
  • the article 10 further comprises an inner topsheet (not shown in Figure la) and an outer cover assembly 20.
  • the outer cover assembly 20 and the topsheet 30 will be further expl ained below.
  • the topsheet is that sheet which in use of the diaper is in contact with the skin of the wearer or at least facing the skin.
  • the article may also be provided with a waist containment pocket and elasticised leg openings, i.e. leg opening 220, leg opening 230 , leg elastics 240 and leg elastic 250. Since such constructional features are, however, well known in the art, they will not be described in further detail.
  • the article may also be provided by a so-called raised barrier cuffs ⁇ not shown) in order to provide an improved security against leakage.
  • These rai sed barrier cuffs may in some instance replace leg elastics.
  • the absorbent article is a so-called open diaper, which has no side seams between the front and rear portions 150 and 160.
  • Fastening means in the form of mechanical fasteners or adhesive tape are provided at the side edges of the rear portions and are intended to be fastened along the external surface of the front portion.
  • side panels may join the front and rear portions to form a continuous waist opening.
  • Each side panel is made up of a first side panel portion adjacent the front portion and a second side panel port ion adjacent the rear portion .
  • Each side panel may have a fastening means, for example a mechanical fastening means, in the form of a hook or loop member, intended to cooperate with a complementary mechanical fastening means on the outside of the front portion, the so-called landing zone.
  • the entire external surface of the outer cover assembly of the front panel may comprise a non-woven material, which functions as a loop material or a separate strip of loop material may be attached to the external surface of the front panel forming the landing zone.
  • buttons can either be fastened to the side panels or to the absorbent article.
  • adhesive fastening means may be used such as a tape tab, wherein at least part of the external surface of the outer cover assembly of the front portion is of a material to which the tape can adhere.
  • the absorbent article is a so-called belted diaper or incontinence garment comprising a pair of opposed laterally extending belt members usually attached to the rear portion at the waist portion thereof.
  • belt portions are adapted to be wrapped around the waist of the wearer of the garment and fastened together by means of first fastening means, such as an adhesive tape or mechanical fastening means, for example a hook- and- loop fastener.
  • first fastening means such as an adhesive tape or mechanical fastening means, for example a hook- and- loop fastener.
  • the front portion may then be passed between the legs of the wearer and fastened to the outside of the belt members by means of second fastening means provided at the waist portion of the front portion.
  • the materials making up the diaper 10 may be selected from any of the materials commonly used for such products and may include environmentally friendly materials from renewable sources and/or biodegradable material .
  • the topsheet i.e. the liquid permeable layer may suitably be made of a non-woven material.
  • a non-woven material is perforated plastic.
  • the material of the top sheet is preferably selected from a material that exhibits characteristics such as dryness and softness when the diaper is being worn. It is also desirable for the top sheet to be no -irritating to the skin and to have a soft and textile- like surface which remains dry even in the event of repeated wetting.
  • the topsheet could consist of a non-woven material, and could also consist of a perforated, hydrophobic nonwoven material in order to keep the surface which is closest to the user' s body dry, the holes of said nonwoven material being able to impart a textile- like and comfortable feel to the topsheet.
  • Such topsheet s are conventionally known in the art, and those which are known to the skilled person may b e used without particular limitation, as circumstances dictate.
  • the absorbent core 40 is normally enclosed between the liquid permeable topsheet and a liquid impermeable outer cover assembly.
  • the absorbent core 40 may extend between the front portion 150 and the rear portion 160 in the longitudinal direction X of the disposable absorbent article 10 and be joined to the front and rear portions 150, 160, as illustrated in Figure lc, which shows the laminar structure of the absorbent article along line II in Figure lb.
  • the absorbent core 40 may only be joined to one of the front and rear portions 150, 160, or solely to the crotch portion 170, as desired.
  • at least the crotch portion 170 extends between the front portion 150 and the rear portion 160. However, if no crotch portion 170 is present, the absorbent core must extend between the front portion 150 and the rear portion 160 and be joined thereto .
  • the absorbent core 40 can be of any conventional kind. Examples of commonly occurring absorbent materials are cellulosic fluff pulp, tissue layers, highly absorbent polymers ( so -called superabsorbent polymers , or SAP) , absorbent foam materials , absorbent nonwoven materials or the like , and mixtures and/or laminates thereof , compressed or uncompressed, as requirements dictate . It is within the capacity of the skilled person to select an appropriate core for any particular application.
  • the size and absorbent capacity of the absorbent core may be varied to be suited for different uses such as for infants or for incontinent adults .
  • the absorbent core material could comprise an uppe absorbent core and a lower absorbent core .
  • the term "upper” as used herein relates to the portion of the product intended to be positioned closer to the user when in use, whereas the term “lower” as used herein relates to the portion of the product closer to the garment - facing surface thereof.
  • SAP in the lower absorbent core has the main function of increasing the liquid storing capacity of this layer whereas the main function of SAP in the upper absorbent core is to prevent rewetting of liquid absorbed in this layer if the article is compressed by external forces during use.
  • the SAP in the upper absorbent core could be of a different type than the SAP used in the lower absorbent core or be present in a lower percentage than in the lower absorbent core.
  • the SAP may be applied in localised areas of an absorbent core, e.g. in intake regions, liquid distribution regions and/or liquid retention regions.
  • concentration of SAP in an absorbent core may be adjusted depending on the absorbent properties and the type of absorbent article which is to be produced, e.g. a high amount of SAP may be used in order to achieve a thin absorbent article, while lower amounts may be used in some hygiene articles intended for light incontinence products.
  • a suitable material for the absorbent core is pulp mixed with approximately 30 % of SAP from BASF, Ludwigshafen, Germany available under the trade name Hysorb M7125.
  • the mixture of cellulose fluff and SAP has preferably a density of 0.08 - 0.13 g/cm3.
  • the absorbent core may also be made from a chlorine - free fluff pulp such as Totally Chlorine Free fluff pulp which is commercially available from Stora Enso .
  • the diaper may also comprise other layers such as a fluid acquisition layer for a quick transport of body fluids.
  • the fluid acquisition layer has an open porous structure and should be able to quickly receive and temporarily store a certain amount of fluid and transfer it further to the underlying absorbent core. This is important, especially for the thin, compressed absorbent articles of today, which often have a high content of SAP. Absorbent articles of today certainly have high absorption capacity, but on the other hand they sometimes have a receiving speed which is too low to instantaneously cope with receiving large amounts of liquid which could be released upon urination within a few seconds time interval.
  • the fluid acquisition layer is usually a so-called high loft material produced by carding and through -air bonding or needling synthetic fibres, such as polyester, polypropylene or mixtures thereof.
  • a suitable material for the acquisition layer is a hydrophobic wadding of through air nonwoven available from LIBELTEX, having the trade name DRY WEB T 23W.
  • the outer cover assembly 20 as shown in Figure lc extends in the longitudinal direction Y and the transverse direction X, and has a thickness direction Z extending perpendicular to the longitudinal direction X and the transverse direction Y.
  • the outer cover assembly 20 comprises at least a first nonwoven layer 50, a second intermediate layer 60, and an inner liquid- impermeable film layer 80.
  • the second intermediate layer 60 is superposed on the inner liquid- impermeable film layer 80, and the first nonwoven layer 50 is superposed on the second intermediate layer 60 as an outer surface of the outer cover assembly and/or the absorbent article .
  • the outer cover assembly 20 may al so be referred to as a multi- component outer cover, chassis or backshee .
  • the outer cover assembly in use, covers the absorbent core 40 on the garment -facing side thereof.
  • the topsheet 30 and outer cover assembly 20 generally have a similar extension in the plane, while the absorbent core 40 has an extension which is somewhat smaller.
  • the topsheet 30 and outer cover assembly 20 are joined to one another around the periphery of the absorbent core, so that the absorbent core is enclosed within the envelope formed by the topsheet 30 and cuter cover assembly 20.
  • the topsheet 30 and outer cover assembly 20 may be joined to one another by any means common in the art, e.g. ultrasonic welding, thermal welding or gluing.
  • the outer cover assembly material may be breathable so as to allow vapour to escape from the absorbent core while still preventing liquids from passing therethrough.
  • breathable materials are microporous polymeric films, nonwoven laminates from spunbond and meltblown layers, laminates from microporous polymeric films and nonwoven materials.
  • the areas of the outer cover assembly 20 outside of the absorbent core 40 may be formed of the opshee and the outer cover assembly joined together to form a laminate structure. Alternatively at least part of the outer cover assembly outside the absorbent core area is made of another web material, which provides comfort and breathabil ity .
  • the outer cover assembly 20 comprises a liquid impervious film layer 80, such as a thin plastic film, e.g. a polyethylene or polypropylene film.
  • the liquid impervious film layer should at least cover the absorbent core on the garment -facing side thereof .
  • the liquid impervious film layer may also be breathable. This allows a higher degree of comfort for the wearer, as moisture/humidity build-up is reduced or completely avoided.
  • the breathability of the liquid impervious film layer may be obtained by incorporating calcium carbonate (CaCC ⁇ ) filler material into a microporous polyethylene film..
  • the breathability of the liquid impervious film layer may be quantified by the Water Vapour Transmission Rate (WVTR) according to ASTM E.96 - 00 Procedure D.
  • the liquid impervious film layer has a Water Vapour Transmission Rate of at least. 500 g/m 2 24h, preferably at least 1500 g/m 2 24h, or most preferably at least 3000 g/m 2 24h as measured by the above ASTM procedure .
  • the outer cover assembly 20 further comprises a first nonwoven layer 50.
  • the first nonwoven layer 50 preferably has a textile or textile-like outer surface in order to avoid the stickiness that may be felt in contact with a plastic film surface.
  • a textile or textile -like outer surface is also preferred for the reason that it enhances the likeness of the pant diaper or other pant garments to regular underwear.
  • the first nonwoven layer 50 is preferably a spunbond, meltblown, spunlaced, hydroentagled, wetlaid or carded bonded nonwoven .
  • the fibres of the nonwoven material may be natural (e.g. rayon or cellulose fibres) or artificial (e.g. polymeric fibres such as polyolefin fibres, e.g. polyethylene or polypropylene fibres).
  • the first nonwoven layer 50 may be elastic or inelastic and will preferably comprise or consist of at least one nonwoven ply.
  • the first nonwoven layer 50 may even comprise a laminate of two or more nonwoven plies, such as a SMS (Spunbond-Meltblown- Spunbond) - composite material.
  • the first nonwoven layer 50 will form part of a chassis for a disposable pant-type garment.
  • the first nonwoven layer 50 has a basis weight of between 5-40 g/m 2 , preferably 8-30 g/m 2 .
  • the first nonwoven layer 50 should suitably be air-permeable.
  • the outer cover assembly 20 also comprises a second intermediate layer 60.
  • the second intermediate layer 60 can consist of any flexible web material as commonly used in the art, such as a layer of nonwoven material, a plastic film or a laminate of two or more sheets of the same or different materials.
  • the second intermediate layer 60 is preferably a spunbond, meltblown, spunlaced, hydroentagled, wetlaid or carded bonded nonwoven.
  • the fibres of the nonwoven material may be natural (e.g. rayon or cellulose fibres) or artificial (e.g. polymeric fibres such as polyolefin fibres, e.g. polyethylene or polypropylene fibres).
  • the second intermediate layer 60 may be elastic or inelastic and will preferably comprise or consist of at least one nonwoven ply .
  • the second intermediate layer 60 may even comprise a laminate of two or more nonwoven plies, such as a SMS (Spunbond-Me11b1own-Spunbond) composite material.
  • the second intermediate layer 60 will form part of a chassis for a disposable pant-type garment.
  • the second intermediate layer 60 has a basis weight of between 5-40 g/m 2 , preferably 8-30 g/trf .
  • the second intermediate layer 60 should suitably be air-permeable.
  • the second intermediate layer 60 may alternatively comprise a plastic film, e.g. a polyolefin film such as polyethylene or polypropylene.
  • the second intermediate layer 60 may even comprise a laminate of one or more nonwoven layers with one or more plastic films .
  • the nonwoven layer 50 and the intermediate layer 60 may be of the same material, or may be different.
  • the dimensions of the intermediate layer 60 are essentially independent of the dimensions of he nonwoven layer 50.
  • the intermediate layer 60 may have the same dimensions as the nonwoven layer 50, as shown in Figure lb . However, it may be possible that the intermediate layer 60 has an extension in the longitudinal and transverse direction which is greater than or less than that of the nonwoven layer 50. The amount with which the intermediate layer 60 overlaps the nonwoven layer 50 may be selected appropriately by the skilled person.
  • the dimensions of the intermediate layer 60, and the amount of overlap between the nonwoven layer 50 and the intermediate layer 60 are such that the intermediate layer 60 overlaps the nonwoven layer 50 in the entire region of the nonwoven layer 50 in which the body elastic threads 190 are located.
  • the nonwoven layer 50 and the intermediate layer 60 may be fixed together by any suitable means, e.g. thermal welding, ultrasonic welding or adhesion . Adhesion is most preferred.
  • the nonwoven layer 50 and the intermediate layer 60 are suitably fixed to one another across substantially their entire area of overlap.
  • the nonwoven layer 50 and the intermediate layer 60 are laminated with the liquid impervious film layer 80.
  • Lamination may take place in a number of ways, such as e.g. thermal welding, ultrasonic welding or adhesion.
  • the inner liquid- impermeable film layer 80 is further provided with at least one graphic 90.
  • the graphic 90 has an extension in the longitudinal direction Y and the transverse direction X.
  • the graphic 90 can either be located on the rear portion 160, the front portion 150, the intermediate crotch portion 170, or on a combination of any of the portions 150, 160 and 170. In one aspect of the invention, the graphic may extend from one of the portions to another portion.
  • the graphic 90 may coomprise any desirable design, and can combine one or more representations such as letters, figures, symbols or combinations thereof.
  • the graphic is provided, and preferably printed, on the exterior side of the inner liquid- impermeable film layer 80 on which the second intermediate layer 60 is to be superposed.
  • Presently contemplated embodiments include those involving the use of a pre -printed polyethylene film, a pre-printed non oven fabric.
  • the graphic may be provided by means of a label or patch, presently preferred to be made of polyethylene, a nonwoven fabric, or a tissue material , on which the graphic is pre-printed.
  • the graphic may be provided on the layer, the label or the patch with any image -forming process which might occur to the skilled person in this art, and should be taken to include graphics which are, for example, embossed or embroidered, as well as printed .
  • a portion of a film layer 80 of a 1 iquid impermeable material, e.g. polyethylene, is schematically disclosed.
  • a set of printed areas 90 or pictures is printed on this layer by suitable printing technique.
  • Multicolour printing on the liquid-impermeable film layer 80 can be carried out by, for example, flexographic printing or gravure printing. Any other printing techniques, if appropriate, can be utilized.
  • Flexographic printing is a technique in which an object to be printed is clinging to an impression drum while running on a plate cylinder and therefore undergoes little stretching. Therefore, it is suited for multicolour printing on a thin and stretchy material like the liquid-impermeable film layer 80.
  • the graphic 90 is represented as a grid of dots, but as mentioned above, other objects or figures can of course be used instead of dots, without limitation. Configuration of the film, layer, n on woven layer and intermediate layer
  • one of the nonwoven layer 50 and the intermediate layer 60 is provided with an opening in the area of the graphic 90.
  • Figures 2a, 2b, 2c and 2d show a first exemplary layer configuration relating to the present invention.
  • the film layer 80 is shown with two graphics 90, one on a portion which will form the front of the garment when worn, the other on a portion which will form the back of the garment when worn.
  • the number and arrangement of the graphics 90 is purely exemplary; only a single graphic may be provided, on the front, on the back or elsewhere.
  • two or more than two graphics may be provided, for example, two graphics on the front, one on the back, or two on the back, two on the front, depending on the information to be conveyed.
  • an intermediate layer 60 is shown, with openings 70 which correspond to the positions of the graphics 90 on the film layer 80.
  • the graphics may be larger or smaller than the openings; here, each opening 70 is sized so as to expose the entire respective graphic 90 when the layers 60 and 80 are overlaid.
  • the opening may be exactly sized to expose the graphic; or the opening may be slightly larger than or slightly smaller than the graphic, depending on whether the edges of the graphic are intended to be clearly visible, and on the positional accuracy of the lamination processes available.
  • intermediate layer 60 is of approximately the same height as the film layer 80 but has an hourglass shape, defining two wider regions, suitable for forming a waistband, and a narrower region, of approximately the same width as the film layer 80, between the wider region, being suitable for forming a portion to fit between the legs of the user.
  • the narrower portion and the two wider regions when folded about a horizontal axis to form a diaper or similar article, define holes for legs.
  • the layers 60 and 80 are overlaid, so as to expose the graphics 90 through the respective openings 70.
  • a nonwoven layer 50 is positioned over the intermediate layer 60, the nonwoven layer 50 having optical transmittance sufficiently high so that the graphic may be discerned through the layer when observed from the outside, i.e. looking through nonwoven layer 50 through the opening in intermediate layer 60 towards film layer 80.
  • opening 70 is approximately square, but this is considered exemplary only.
  • the opening may be made of any shape, dependent on the shape of the graphic and the structural requirements of the produced article.
  • the opening or openings may be formed by arrangement of discrete pieces of material, as exemplified in Figures 3a, 3b, and 3 c .
  • a film layer 80 is shown similar to that of Figure 2a.
  • two pieces of material 110 and 120 are positioned overlapping with the film layer 80 so as to define an opening 70 through which the graphic 90 is exposed.
  • a further two pieces of material are positioned similarly with respect to the other, optional, graphic visible in Figure 3b.
  • the four pieces of material constitute an intermediate layer 60.
  • the pieces are square, but rectangular shapes, or other irregular shapes, may also be contemplated depending on design requirements.
  • a piece of material 100 is overlaid on pieces of material 110 and 120, and a similar piece is overlaid on the other two pieces of material which constitute, together with pieces of material 110 and 120, the intermediate layer 60.
  • the pieces of material cover the opening 70 and the graphic 90.
  • the pieces of material 110 and 120 are approximately square and do not extend the full length of film layer 80, while the piece of material 100 is rectangular, of height comparable to that of pieces of material 110 and 120 and of width sufficient to cover both pieces of material 110 and 120,
  • This configuration allows, when folded along a horizontal axis, leg holes easily to be defined without the cutting the vertical edge curve seen in Figure 2d, This is advantageous in terms of material use, and in terms of producing articles of larger sizes.
  • other shapes are contemplated, and indeed a curved edge to the leg holes may be provided by appropriately shaping the pieces prior to or during assembly 100, 110 and 120.
  • nonwoven layer 50 can also be a single piece of material partly overlapping, or completely covering, the graphic or graphics and the pieces of material making up intermediate layer 60.
  • the opening 70 is defined in the intermediate layer 60 , whether by forming in a continuous layer or by arrangement of pieces of material 110, 120.
  • the arrangement wherein the opening is equivalently formed in the nonwoven layer 50; the intermediate layer 60 then being a continuous layer in the region of the graphic, having optical transmittance sufficiently high so that the graphic may be discerned through the layer when observed from the outside.
  • Presently preferred is to form the opening or openings in the intermediate layer 60, since then the edges of the opening or openings are protected from handling damage by the nonwoven layer 50.
  • Figure 4a shows film layer 80, similar to that shown in Figure 3a, although having (in this example) only one graphic .90 provided to it, here, for example, to be provided on a front portion of the article .
  • Figure 4b shows an intermediate layer 60 laminated with the film layer 80, the intermediate layer 90 having similar width and length dimensions as the film layer 80, and having an opening 70 to correspond in position and dimensions to the graphic 90 when the layers 80 and 60 are overlaid.
  • Figure 4c shows the structure of Figure 4b further provided with a nonwoven layer 55 formed in two pieces of material, each rectangular in form and of similar dimensions , one provided to cover the opening 70, the other provided at a symmetrical position with respect to a horizontal axis, with space between.
  • the pieces of material forming layer 55 are wider than film layer 80, such that by folding the arrangement of Figure 4c about the horizontal axis, similar to Figures 3a to 3c, and bringing the vertical edges of the pieces of material forming layer 55 together, a waistband and leg holes are defined.
  • Figure 4c also shows a further nonwoven layer 50, made of pieces of material of similar dimensions and arrangement as the pieces constituting layer 55 and overlaid thereon.
  • the furthe nonwoven layer 50 forms the backsheet of the garment and is able to isolate any elastics and/or glue used in the construction from the surface of the garment.
  • a reduced amount of nonwoven material is needed to produce the garment since is no particular need to cut out sections for forming holes for the user's legs. Tooling costs can thus also be reduced in this embodiment.
  • the combination of layer 50 with layer 55 should preferably have a comparable light transmittance to layer 50 of the embodiments of Figures 2a to 2d and 3a to 3c, to enable the graphic to be most clearly displayed.
  • layer 55 of Figure 4c can be formed in the same manner as e.g layer 50 of Figure 2d.
  • the opening or openings may be formed wholly within the borders of the layer defining the opening or openings; in other arrangements, the opening or openings are provided at an edge portion of the layer.
  • the former is preferable in terms of structural integrity; the latter, in terms of simplicity of manufacturing .
  • a light transmittance is represented by a ratio of the intensity of light incident on an object to that of transmitted light.
  • the transmittance of the layers 50 and 60 can be increased by decreasing their basis weight, but too small a basis weight tends to fail to provide the outer cover assembly 20 with a satisfactory texture or feel.
  • the layer (s) superposed on the inner liquid - impervious film layer 80 it is preferred for the layer (s) superposed on the inner liquid - impervious film layer 80 to have a total basis weight of 5 to 40 g/m 2 , preferably 8 to 30 g/m 2 .
  • advantageous opt ical transmi ttances of 55% or higher, more preferably 65% or higher, most preferably 75% or higher may be achieved, in practice, without compromising texture or feel.
  • each or both layers may be colored as long as the clearness of the graphic 90 or the appearance of the disposable absorbent article 10 is not impaired.
  • the absorbent articles are preferably designed to closely fit the body of the user in such a way that the absorbent articles do not become loose or slip off the body of the user .
  • the outer cover assembly 20 can for instance be provided with a number of elastic threads 195 arranged parallel from the waist opening.
  • the elastic threads are preferably also arranged towards the leg openings 240 and 250, as previously explained .
  • the absorbent article is provided with a more comfortable fit allowing good leakage security. Accordingly, in the outer cover assembly 20, the first nonwo en layer 50 and the second intermediate layer 60 can extend outward from the front and rear edges of the inner liquid- impermeable film layer 80, and the extended parts can be folded back on the topsheet 30 side.
  • the folded parts of the layers 50 and 60 in the front and rear waist opening portions can overlap, partially or wholly, the absorbent core 4.
  • a plurality of elastic members 195 together forming the so-called waist elastic, are fixedly disposed between the folded parts of the layers 50 and 60 over the width of the outer cover assembly 20 in their tensioned state such that they can contract and thus gather the nonwoven material in the waist band when they are allowed to relax.
  • the elastic members 195 are disposed such that their ends may meet with an overlap when the side ends of the front portion 150 and the side ends of the rear portion 160 are respectively joined together. In this manner there is formed substantially a continuous loop of gathers encircling near the waist opening of the diaper 10.
  • the waist elastic 195 may be in the form of a waist band formed from plies of substantially non-elastic nonwoven material that is elasticized by one or more elongated elastic members, such as elastic threads or bands that are arranged between the plies.
  • the plies can be formed from a single layer of material such as an edge portion of the first nonwoven layer 50 that is folded over onto itself or can be made from separate materials such as a portion of the first nonwoven layer 50 and a layer of another material.
  • An embodiment of a disposable pant diaper according to the invention need not have waist elastic with the configuration shown in Figure la.
  • the waist elastic may be entirely absent or may be arranged on only one of the front portion 150 and the rear portion 160.
  • the waist elastic may extend along only a part of the waist opening such as along a central section of the front waist edge and/or the rear waist edge.
  • the outer cover assembly 20 is preferably inelastic in the crotch area .
  • the outer cover assembly may further comprise body elastic 190.
  • the body elastic is applied between the first nonwoven layer 50 and the second intermediate layer 60, or integrated with one of the first, nonwoven layer and the second, intermediate layer, for example as elastic elements extending through the layer, such that the outer cover assembly 20 is elasticated.
  • the body elastic 190 is shown as multiple elongated elastic members extending between the side edges 180 and 180' across the front portion 150 and the rear portion 160.
  • the elastic members may be elastic strings or bands that may be uniformly or non-uniformly spaced over the portions 150 and 160 and that may have been applied with the same or different tensioning.
  • body elastic is not essential, however, and may be omitted or designed in other ways as found suitable for a specific purpose, Accordingly, body elastic may be applied to only one of the front and rear body portion 150 and 160 and may include or consist of curved elastic elements.
  • the body elastic may extend over part of the absorbent core.
  • the elastic threads, or the elastic material it is common to allow the elastic threads, or the elastic material, to extend only over the upper portions of the absorbent article.
  • the elastic threads typically only extend from the waist opening to the absorbent core, but not over the absorbent core .
  • the action of body elastic on an underlying layer will be to compress the layer laterally, which in turn tends to cause the layer to become deformed, for example by wrinkling.
  • the region of liquid- impermeable film layer 80 on which graphic 90 is printed becomes wrinkled, the graphic will itself become wrinkled, and the visibility and clarity of the graphic 90 will become decreased. Therefore, in embodiments having body elastic, it is preferable that the body elastic is configured, in a region of the opening 70 at least, so as not to cause at least that region of the liquid- impermeable film layer 80, visible through the opening and on which graphic 90 is printed, to become wrinkled.
  • This may be achieved by simply cutting the material of the elastic, for example the elastic threads, in order to provide an area of the laminate that is no longer elastic so that it does not become wrinkled in use, using one of several techniques known in the art. For example, it is possible to use a technique similar to that disclosed in JP -A -2002 -253605. Alternatively, the elasticity of the elastic material may be deactivated, for example by decreasing the tension in the elastic threads in the region of the opening to similar effect.
  • an elastic material such as elastane threads (obtainable under the trade name Lycra) , which is sufficiently thin and transparent in use as not to obscure the graphic, at least in the region of the opening
  • the outer cover assembly 20 is provided with an elastic film material (not shown) such that the outer cover assembly is elasticated.
  • the outer cover assembly 20 comprises an elastic film material layer 80, a first nonwoven material 50 and a second nonwoven material 60.
  • the elastic film material is liquid- impermeable , and is arranged closer to the absorbent core 40 in the thickness direction Z than the at least first and second nonwoven layers 50, 60.
  • the inner liquid- impermeable elastic film layer 80 is then further provided with a graphic 90.
  • the graphic 90 has an extension in the longitudinal direction Y and the transverse direction X. Any of the nonwoven layers 50, 60 forms an opening 70 in the longitudinal direction Y and the transverse direction X such that said opening 70 extends over at least a part of the graphic 90.
  • At least part of the outer cover assembly outside the absorbent core area is made of another web material, which provides comfort and breathabi 1 ity.
  • a pant absorbent article of this type is shown in WO2005/ 122984 , in which a part of the outer cover assembly covering the front and back portions comprises an elastic web material in the form of an elastic laminate.
  • front and back portions 150 and 160 may alternatively be made of an inelastic material and elasticized side panels may be provided in the sides of the absorbent article in the area bridging the front and back portions.
  • the body elastic and one or more elastic layers as disclosed above may be provided together .
  • the elastic layer will tend to wrinkle as the tension is further released from the body elastic.
  • the body elastic should preferably be deactivated in the manner described above in the region of the graphic , in order to avoid the wrinkling degrading the clarity of the graphic.
  • Figure 5 shows an exemplary mode of manufacture of an embodiment of the present invention.
  • a web of film 80 having graphics 90 previously provided to it travels from left to right.
  • a web of intermediate material 60 is directed from above the web of film 80, via a cutter C which forms openings 70 by cutting out blanks 75, to overlay web of film 80 such that the graphics 90 are aligned with openings 70.
  • Webs of film 80 and intermediate material 60 then travel in synchrony further to the right, where a further web of nonwoven material 50 is directed from above the laminated layers 80 and 60 to overlay the laminate.
  • the three webs, respectively of film 80, intermediate material 60 and nonwoven material 50 then travel in synchrony further to the right, where portions 220 and 230 of the laminate are removed to define waistband and crotch regions, and thereby eventually leg holes.

Abstract

La présente invention concerne un ensemble couverture extérieure (20) pour un article absorbant jetable. L'ensemble couverture extérieure (20) s'étend dans une direction longitudinale (Y) et dans une direction transversale (X) et a une direction d'épaisseur (Z) s'étendant perpendiculairement à la direction longitudinale (X) et à la direction transversale (Y). L'ensemble couverture extérieure (20) comprend au moins une première couche non tissée (50), une deuxième couche intermédiaire (60) et une couche intérieure de film imperméable aux liquides (80) stratifiées dans cet ordre dans la direction d'épaisseur (Z), la couche intérieure imperméable aux liquides (80) étant dotée, sur son côté faisant face à la deuxième couche intermédiaire (60), d'au moins un graphique (90), qui possède une extension dans la direction longitudinale (Y) et la direction transversale (X). La première couche non tissée (50) ou la seconde couche intermédiaire (60) est dotée d'au moins une ouverture (70) s'étendant dans la zone du graphique (90) dans la direction longitudinale (Y) et la direction transversale (X) et sur au moins une partie du graphique (90). La couche qui n'a pas d'ouverture de la première couche non tissée et de la deuxième couche intermédiaire a un facteur de transmission optique au moins dans la zone couvrant la ou les parties du graphique de telle sorte qu'au moins une partie du graphique est visible à travers l'autre couche. La présente application concerne également un article absorbant jetable (10), par exemple une couche, une protection contre l'incontinence ou une serviette hygiénique, comprenant un ensemble couverture extérieure (20) tel que décrit.
PCT/EP2012/058526 2012-05-09 2012-05-09 Ensemble couverture extérieure et article absorbant jetable WO2013167179A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2015510656A JP6092370B2 (ja) 2012-05-09 2012-05-09 外側カバーアセンブリおよび使い捨て吸収性物品
IN9700DEN2014 IN2014DN09700A (fr) 2012-05-09 2012-05-09
MX2014013027A MX341238B (es) 2012-05-09 2012-05-09 Montaje de cubierta externa y articulo absorbente desechable.
CN201280073040.8A CN104271098B (zh) 2012-05-09 2012-05-09 外罩组件和一次性吸收性物品
PCT/EP2012/058526 WO2013167179A1 (fr) 2012-05-09 2012-05-09 Ensemble couverture extérieure et article absorbant jetable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/058526 WO2013167179A1 (fr) 2012-05-09 2012-05-09 Ensemble couverture extérieure et article absorbant jetable

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WO2013167179A1 true WO2013167179A1 (fr) 2013-11-14

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JP (1) JP6092370B2 (fr)
CN (1) CN104271098B (fr)
IN (1) IN2014DN09700A (fr)
MX (1) MX341238B (fr)
WO (1) WO2013167179A1 (fr)

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JP2017148363A (ja) * 2016-02-26 2017-08-31 大王製紙株式会社 使い捨ておむつ
WO2017194093A1 (fr) * 2016-05-10 2017-11-16 Sca Hygiene Products Ab Article absorbant jetable amovible
EP3470032A4 (fr) * 2016-06-09 2020-01-22 Daio Paper Corporation Couche jetable de type culotte
EP3470033A4 (fr) * 2016-06-09 2020-01-22 Daio Paper Corporation Couche jetable de type culotte

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JP2015515890A (ja) 2015-06-04
CN104271098B (zh) 2016-09-14
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JP6092370B2 (ja) 2017-03-08
MX2014013027A (es) 2015-02-04
MX341238B (es) 2016-08-12

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