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WO2016168997A1 - Article absorbant doté de panneaux taille et de coutures latérales améliorés - Google Patents

Article absorbant doté de panneaux taille et de coutures latérales améliorés Download PDF

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Publication number
WO2016168997A1
WO2016168997A1 PCT/CN2015/077143 CN2015077143W WO2016168997A1 WO 2016168997 A1 WO2016168997 A1 WO 2016168997A1 CN 2015077143 W CN2015077143 W CN 2015077143W WO 2016168997 A1 WO2016168997 A1 WO 2016168997A1
Authority
WO
WIPO (PCT)
Prior art keywords
waist panel
protective layer
layer
rear waist
front waist
Prior art date
Application number
PCT/CN2015/077143
Other languages
English (en)
Inventor
Qingchun LU
Original Assignee
Kimberly-Clark (China) Co., Ltd.
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 Kimberly-Clark (China) Co., Ltd. filed Critical Kimberly-Clark (China) Co., Ltd.
Priority to AU2015392253A priority Critical patent/AU2015392253B2/en
Priority to PCT/CN2015/077143 priority patent/WO2016168997A1/fr
Priority to CN201580078722.1A priority patent/CN107405218B/zh
Publication of WO2016168997A1 publication Critical patent/WO2016168997A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—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 shape
    • A61F13/49—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 shape specially adapted to be worn around the waist, e.g. diapers, nappies
    • A61F13/496—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 shape specially adapted to be worn around the waist, e.g. diapers, nappies in the form of pants or briefs
    • A61F13/4963—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 shape specially adapted to be worn around the waist, e.g. diapers, nappies in the form of pants or briefs characterized by the seam

Definitions

  • the side seams are routinely made using thermal fusion in lieu of adhesive seams. Thermal seams are more desirable as they can form stronger bonds due to the melting and fusion of the fibers and/or other materials of the respective front and rear waist panels.
  • thermal seams are more desirable as they can form stronger bonds due to the melting and fusion of the fibers and/or other materials of the respective front and rear waist panels.
  • To form such bonded side seams several techniques are employed. One is ultrasonic bonding and the other is conventional heated bonding rolls which typically use a male patterned roll and a corresponding smooth anvil roll or mating patterned rolls where the bonding designs on each roll mate with one another.
  • the waist panels themselves, a common design is to use two external layers of fibrous nonwoven web (one for the garment side and one for the body-facing side) with a layer of elastic material sandwiched between and adhesively joined to each of the external layers of fibrous nonwoven web material.
  • the elastic layer can be a stranded material such as a plurality of laterally-extending and vertically-spaced apart elastic strands.
  • the elastic layer can be a layer of elastic film or an elastic mesh material laminated between the two outer layers of fibrous nonwoven web material.
  • a common formation technique is to make the external, garment-facing layer of material in the waistband (above the upper-most edge of the elastic material forming the waistband) taller than the internal, body-facing layer of material that also extends above the upper-most edge of the elastic material forming the waistband.
  • This extra external waistband material is folded inwardly over the body-facing layer and then down over the upper-most, top edge of the absorbent core. This is done to protect the wearer from the unfinished and otherwise exposed top edge of the absorbent core.
  • both layers, the internal and external layers are extended above the uppermost edge of the elastic material and then folded inwardly over the top edge of the absorbent core to again protect the wearer from the top edge of the absorbent core.
  • a portion of the waistband including all three components are folded over inwardly towards the bodyside of the product.
  • a portion of the external layer again becomes an interior layer of the side seams subject to fusion bonding.
  • polymers such as polyethylene to form homogeneous fibers or bicomponent fibers with polyethylene exterior surfaces or sheaths and polyesteror polypropylene interiors or cores.
  • Polyethylene is recognized as having a better hand and more perceived softness when compared to polypropylene.
  • a problem can arise however when an attempt is made to fusion bond polyethylene with polypropylene. Due to the incompatibility of the polymers, creating strong side seams becomes a problem as such polymers do not bond together well using fusion bonding (heat and pressure) with standard construction techniques. This is because, when an external layer is folded over, onto the inside of the product, to cover the top edge of the absorbent core, the external layers become dispersed between internal layers.
  • an absorbent article including a front waist region, a rear waist region and a crotch region disposed between the front waist region and the rear waist region with the absorbent article defining a longitudinal centerline.
  • the front waist region has a front waist panel and the rear waist region has a rear waist panel with an absorbent structure located in the crotch region and extending into the front waist panel region and the rear waist panel region.
  • Each of the front waist panel and the rear waist panel has a waist panel top edge, a waist panel left side edge and a waist panel right side edge.
  • Each of the front waist panel and the rear waist panel further has a garment facing surface and a body-facing surface.
  • the front waist panel is bonded to the rear waist panel to form a pair of side seams to define a waist border with a waist opening and a pair of leg openings.
  • the absorbent structure has an absorbent structure front top edge located in the front waist region, an absorbent structure rear top edge located in the rear waist region and a pair of absorbent structure longitudinal side edges joining the absorbent structure front top edge and the absorbent structure rear top edge with the absorbent structure having a body-facing surface and a garment facing surface.
  • the front waist panel has a front waist panel garment layer and a front waist panel liner layer with an elastics means located there between.
  • the rear waist panel has a rear waist panel garment layer and a rear waist panel liner layer with an elastics means located there between.
  • the absorbent structure is attached to a body-facing surface of the front waist panel liner layer and the rear waist panel liner layer.
  • the front waist panel has a front waist panel protective layer covering at least a portion of the body-facing surface of the absorbent structure including at least a portion of the absorbent structure front top edge.
  • the rear waist panel has a rear waist panel protective layer covering at least a portion of the body-facing surface of the absorbent structure including at least a portion of the absorbent structure rear top edge.
  • At least one of the pair of side seams includes the front waist panel garment layer, the rear waist panel garment layer, the front waist panel liner layer, the rear waist panel liner layer and at least one of the front waist panel protective layer and the rear waist panel protective layer.
  • At least one of the front waist panel protective layer and the rear waist panel protective layer is located between the front waist panel liner layer and the rear waist panel liner layer, and the front waist panel liner layer and the rear waist panel liner layer are located between the front waist panel garment layer and the rear waist panel garment layer.
  • At least one of the pair of side seams has a fusion bond bonding together the front waist panel liner layer, the rear waist panel liner layer and at least one of the front waist panel protective layer and the rear waist panel protective layer.
  • the side seams can have a peel strength of at least about 450 grams force and the peel strength can range from about 450 grams force to about 5000 grams force.
  • the garment layer, the liner layer and the protective layer each have top edge which terminates at the waist border.
  • the garment layer, the liner layer and the protective layer each have top edge and at least one of the top edges terminates at the waist border.
  • At least one of the front waist panel and the rear waist panel, the liner layer and the protective layer are joined to one another by a fold line between the liner layer and the protective layer. In an embodiment at least one of the front waist panel protective layer and the rear waist panel protective layer does not extend into at least a portion of one of the pair of side seams.
  • the front waist panel garment layer and the front waist panel liner layer have a peel strength which is less than 400 grams force.
  • the rear waist panel garment layer and the rear waist panel liner layer have a peel strength which is less than 400 grams force.
  • the front waist panel has a waist panel bottom edge and the front waist panel protective layer has a waist panel protective layer top edge, a waist panel protective layer lower edge, a waist panel protective layer left side edge, and a waist panel protective layer right side edge with the waist panel protective layer lower edge being positioned between the waist border of the front waist panel and the waist panel bottom edge of the front waist panel.
  • At least one of the pair of side seams does not contain the waist panel protective layer left side edge and the waist panel protective layer right side edge from at least one of the front waist panel and the rear waist panel.
  • the rear waist panel has a waist panel bottom edge and the rear waist panel protective layer has a waist panel protective layer top edge, a waist panel protective layer lower edge, a waist panel protective layer left side edge and a waist panel protective layer right side edge with the waist panel protective layer lower edge being positioned between the waist border of the rear waist panel and the waist panel bottom edge of the rear waist panel.
  • the rear waist panel has a waist panel bottom edge and the rear waist panel protective layer has a waist panel protective layer top edge, a waist panel protective layer lower edge, a waist panel protective layer left side edge and a waist panel protective layer right side edge with the waist panel protective layer lower edge being positioned between the waist border of the rear waist panel and the waist panel bottom edge of the rear waist panel.
  • At least one of the pair of side seams does not contain the waist panel protective layer left side edge and the waist panel protective layer right side edge.
  • At least one of the pair of side seams do not contain the waist panel liner layer from at least one of the front waist panel and the rear waist panel.
  • the absorbent article includes a front waist region, a rear waist region and a crotch region disposed between the front waist region and the rear waist region with the absorbent article defining a longitudinal centerline.
  • the front waist region has a front waist panel and the rear waist region has a rear waist panel with an absorbent structure located in the crotch region and extending into the front waist panel region and the rear waist panel region.
  • Each of the front waist panel and the rear waist panel has a waist panel top edge, a waist panel left side edge and a waist panel right side edge, each of the front waist panel and the rear waist panel further has a garment facing surface and a body-facing surface.
  • the front waist panel is bonded to the rear waist panel to form a pair of side seams to define a waist border with a waist opening and a pair of leg openings.
  • the absorbent structure has an absorbent structure front top edge located in the front waist region, an absorbent structure rear top edge located in the rear waist region and a pair of absorbent structure longitudinal side edges joining the absorbent structure front top edge and the absorbent structure rear top edge with the absorbent structure having a body-facing surface and a garment facing surface.
  • the front waist panel has a front waist panel garment layer and a front waist panel liner layer with an elastics means located there between.
  • the rear waist panel has a rear waist panel garment layer and a rear waist panel liner layer with an elastics means located there between.
  • the absorbent structure is attached to a body-facing surface of the front waist panel liner layer and the rear waist panel liner layer.
  • the front waist panel has a front waist panel protective layer covering at least a portion of the body-facing surface of the absorbent structure including at least a portion of the absorbent structure front top edge.
  • the rear waist panel has a rear waist panel protective layer covering at least a portion of the body-facing surface of the absorbent structure including at least a portion of the absorbent structure rear top edge.
  • At least one of the pair of side seams includes the front waist panel garment layer, the rear waist panel garment layer, the front waist panel protective layer and the rear waist panel protective layer.
  • the front waist panel protective layer and the rear waist panel protective layer are located between the front waist panel garment layer and the rear waist panel garment layer.
  • At least one of the pair of side seams has a fusion bond bonding together the front waist panel garment layer, the front waist panel protective layer, the rear waist panel protective layer and the rear waist panel garment layer.
  • Figure 1 is a perspective view of a folded and sealed pull-on diaper or training pant according to the present invention.
  • Figure 2 is a top plan view of the unfolded version of the pull-on diaper of Figure 1.
  • Figure 3 is perspective view of another folded and sealed pull-on diaper according to the present invention utilizing a three piece design.
  • Figure 3A is a partial, cross-sectional side view taken along line 3A-3A of Figure 3 showing the side seam of a pull-on diaper according to the present invention.
  • Figure 4 is a top plan view of the unfolded version of the pull-on diaper of Figure 3.
  • Figure 5 is a partial, cross-sectional side view taken along line 5-5 of Figure 1 showing the waist section and top of the absorbent structure of a pull-on diaper according to the present invention.
  • Figure 6 is a partial, cross-sectional side view taken along line 6-6 of Figure 1 showing the side seam of a pull-on diaper according to the present invention.
  • Figure 7 is an alternate partial, cross-sectional side view of a waist section and the top-most portion of the absorbent structure of a pull-on diaper according to the present invention similar to that shown in Figure 5.
  • Figure 8 is an alternate partial, cross-sectional side view of a waist section and top-most portion of the absorbent structure of a pull-on diaper according to the present invention similar to that shown in Figure 5.
  • Figure 9 is an alternate partial, cross-sectional side view of a waist section and top-most portion of the absorbent structure of a pull-on diaper according to the present invention similar to that shown in Figure 5.
  • Figure 10 is a partial top plan view of a bonding seam that can be used with a side seam for a pull-on diaper according to the present invention.
  • Figure 11 is a partial top plan view of another bonding seam that can be used with a side seam for a pull-on diaper according to the present invention.
  • Figure 12 is an enlarged, partial, cross-sectional side view of another bonded side seam for a pull-on diaper according to the present invention.
  • Figure 13 is a perspective view of an alternate design of a folded and sealed pull-on diaper or training pant according to the present invention.
  • Figure 14 is a top plan view of the unfolded version of the pull-on diaper of Figure 13.
  • Figure 15 is a partial, cross-sectional side view taken along line 15-15 of Figure 13 showing the side seam of a pull-on diaper according to the present invention.
  • the present invention provides an improved method for making absorbent articles, such as a child's training pant, pull-on diaper and adult incontinence pull-on pants having elasticized front and rear waist panels that are joined to one another along side seams. Principles of the invention will be described by reference to a child's training pant.
  • the invention is not limited to training pants, but relates to any type of absorbent disposable garment or article incorporating lateral side seams.
  • Such articles may include, for example, incontinence articles, pull-up diapers, and the like.
  • the pant 20 includes a chassis 22 having a front waist region 23 with a front panel 24, a rear waist region 25 with a rear waist panel 26, and a crotch region 27 with a crotch panel 28 extending between the front and back panels.
  • a waist opening 30 and a pair of leg openings 32 are formed by selectively joining the front waist panel 24 and rear waist panel 26 at side seams 34 on the lateral sides of the pant 20.
  • the side seams 34 extend between the waist opening 30 and respective leg openings 32.
  • a waist border 36 peripherally surrounds the waist opening 30, and is formed upon joining the front waist panel 24 and the rear waist panel 26 at seams 34. The side seams 34 will be discussed in greater detail below.
  • the pant chassis 22 includes an absorbent structure 38 disposed in the crotch panel 28 and extending into the front waist panel 24 in the front waist region 23 and the rear waist panel 26 in the rear waist region 25.
  • the absorbent structure 38 has a length dimension that is greater than the width dimension.
  • the absorbent structure 38 has an absorbent structure front top edge 40 and an absorbent structure rear top edge 42 separated by absorbent structure longitudinal side edges 44.
  • each layer of the product has a body-facing surface which faces the inside of the product when worn and a garment-facing surface which faces the exterior of the product when worn and therefore is closer to any possible garments the wearer may be wearing.
  • the front tope edge 40 and the rear top edge 42 are generally parallel to the waist border 36 and the transverse “X” axis of the product as shown in Figure 2.
  • the longitudinal side edges 44 form the lateral sides of the absorbent structure 38 and are generally parallel to the longitudinal or “Y” axis of the product as shown in Figure 2.
  • the absorbent structure 38 may extend to a point below the waist border 36 in either or both the front waist region 23 and the rear waist region 25. Alternatively, the absorbent structure 38 may extend all the way to the ends of the pant 20 at or adjacent to the waist border 36.
  • the absorbent structure 38 may have any suitable shape and configuration, as recognized in the art. For example, the absorbent structure 38 may be more hourglass shape to mimic the curved leg cutout portions of the chassis 22.
  • the absorbent structure 38 typically includes and absorbent medium such as wood pulp fluff and optionally hydrogel material (not shown) and it may be encased in what is termed a core wrap material (not shown) such as tissue and/or a polymeric fibrous nonwoven web such as a meltblown web. Additionally or alternatively the absorbent medium may be encased in a liquid pervious topsheet and a liquid impermeable backsheet (again not shown) as is recognized in the art. This latter configuration is particularly suitable for the embodiment shown in Figures 3 and 4.
  • a core wrap material such as tissue and/or a polymeric fibrous nonwoven web such as a meltblown web.
  • the absorbent medium may be encased in a liquid pervious topsheet and a liquid impermeable backsheet (again not shown) as is recognized in the art. This latter configuration is particularly suitable for the embodiment shown in Figures 3 and 4.
  • containment flaps 46 may attached at their proximal edges 48 to the absorbent structure 38 or the chassis 22 in general while their free distal ends 50 may be fitted with elastic means 52 such as one or more elastic strands 52.
  • the waist border 36 of the training pant 20 is elasticized with elastic means such as spaced-apart elastic strands 37 or a unitary elastic ribbon or elastic film layer any or all of which are typically encased within garment and body side-facing layers of a soft material such as a fibrous nonwoven web.
  • elastic means such as spaced-apart elastic strands 37 or a unitary elastic ribbon or elastic film layer any or all of which are typically encased within garment and body side-facing layers of a soft material such as a fibrous nonwoven web.
  • auxiliary elastics 39 may be incorporated into the front 24 and rear 26 waist panels between the waist border 36 and the leg openings 32. These additional elastics 39 may be made from the same materials as the elastic means 37 and may extend across the entire width of the product and even into the side seams 34. Alternatively, the elastics 39 may terminate short of the side seams 34 and in addition, they may or may not extend across the absorbent structure 38. For example, in the front waist region 23, the elastics 39 are shown as extending over the absorbent structure 38 while in the rear waist region 25 they do not extend over the absorbent structure 38.
  • the elastics 39 may have the same spacing as the elastics 37 in the waist border 36, the elastic spacing may be greater or smaller than the elastics 37 or they may have an uneven spacing if so desired. As a result of the spacing, size (denier) and degree of stretching used when securing the elastics 37 and 39 to the chassis 22, the degree of tension in the various areas of the chassis 22 can be varied from one region to another. Still further, leg elastics 41 may be used to secure the leg openings 32 about the legs of the wearer as is known in the art. Finally, any or all of the elastic means 37, 39 and 41 may be attached to the chassis 22 through the use of adhesives or other means continuously or intermittently along the surfaces of the chassis 22.
  • FIGS 3 and 4 there is shown pull-on diaper or training pant 20 of an alternate design.
  • the pant has what is termed a “three-piece” construction in that it comprises a front waist panel 24 and a rear waist panel 26joined by an absorbent structure 38.
  • the pant has no leg cutouts or leg elastics in the chassis 22, though supplemental leg elastics could be run down the longitudinal sides of the absorbent structure 38 (not shown) .
  • the absorbent structure 38 of Figures 3 and 4 can be of the same design as the absorbent structure described with respect to Figures 1 and 2.
  • the front waist panel 24 and the rear waist panel 26 each have a waist panel top edge 54, a waist panel bottom edge 55, a waist panel left side edge 56 and a waist panel right side edge 58 joining the waist panel top edge 54 and the waist panel bottom edge 55.
  • the front waist panel 24 and the rear waist panel 26 are joined via a pair of side seams 34 along their respective left and right waist panel side edges 56 and 58.
  • FIG. 5 shows a cross-section taken along line 5-5 of Figure 1
  • Figure 6 shows a cross-section taken along line 6-6 of Figure 1.
  • the front waist panel 24 can utilize elastic means in the waist area (such as waist elastic means 37) as well in the area in and around the absorbent structure 38 (such as auxiliary elastic means 39) .
  • the front waist panel 24 has a front waist panel garment layer 60 designed to be positioned away from the wearer and adjacent the wearer’s clothing and a front waist panel liner layer 62 designed to be positioned towards the body side of the wearer.
  • the rear waist panel 26 has rear waist panel garment layer 64 and a rear waist panel liner layer 66. See Figure 3A. )
  • the elastics means 37 and optional elastic means 39 are positioned between the garment layer 60 and the liner layer 62.
  • a front waist panel protective layer 68 is positioned over the top edge 40 thereby covering the top edge 40 and a portion of the body contacting surface of the absorbent structure 38.
  • the protective layer 68, 70 in both the front waist panel 24 and the rear waist panel 26 has a waist panel protective layer lower edge 63.
  • the front waist panel protective layer 68 also covers the absorbent structure longitudinal side edges 44 and, desirably, extends laterally along the X axis to and into the side seams 34. See Figures 2 and 4.
  • the rear waist panel 26 has a rear waist panel protective layer 70. See Figure 3A.
  • these same components and configurations can be used with the three piece chassis shown in Figures 3, 3A and 4.
  • one of the problems being solved by the present invention is the possible incompatibility of the material forming the garment side of the waist panels with the material forming the body side of the waist panels when the waist panels are joined together to form fused side seams 34. If the material forming the exterior or garment side of the waist panels does not fusion bond well with the material forming the interior or liner or body-facing side of the waist panel, when the exterior material is folded inwardly to cover the top edge of the absorbent structure, the material of the exterior layer will be located between layers of the incompatible interior side material and so the fusion bonding of the layers located within the side seam will potentially suffer.
  • the materials being used to form the exterior and interior layers of the waist panel must be compatible with one another from a fusion bonding perspective when the exterior layer is being folded inwardly in the conventional forming process over the top of the absorbent structure to cover its top edge.
  • the present invention is directed to side seams 34 that are fused to one another via the use of heat and pressure such as are generated by the use of such bonding techniques as heated bonding rolls and ultrasonic bonding equipment.
  • These fusion bonding techniques are collectively referred to a bonding or fusing in the context of forming the side seams 34.
  • This is to be distinguished from the used of adhesives to form the side seams 34 though it is possible to use adhesives as a supplement to the aforementioned bonding/fusing techniques.
  • adhesives may be used to attach the protective layer 68 to the body-facing surface of the absorbent structure 38 and some of this adhesive may also be located in the areas of the side seams 34.
  • adhesives will likely be used to join at least some portion of the body-facing surface of the waist panel garment layers 60, 64 to the garment-facing surfaces of the respective waist panel liner layers 62, 66.
  • the front and rear waist panel liner (62, 64) and waist panel protective (68, 70) layers must be compatible with one another for seaming purposes when forming the side seams 34.
  • compatible it is meant that the side seams 34 have sufficient peel strength that they do not routinely separate during normal use on the wearer.
  • the front waist panel protective layer 68 can be an extension of the front waist panel liner material 62.
  • the front waist panel liner layer material 62 can be formed sufficiently long in the X and Y directions (laterally and longitudinally, respectively) so that a front waist panel fold line 72 can be formed and the extra material can be extended down over the absorbent structure front top edge 40 and desirably the absorbent structure longitudinal edges 44. This is shown in Figure 5.
  • a second layer of material for both the front waist panel 24 and the rear waist panel 26 is present in the side seam area 34 of the waist panels between the garment layers (60, 64) .
  • This second layer of material is the waist panel protective layer 68, 70. More importantly, however, unlike conventional folding techniques, there is no material from the waist panel garment layers (60, 64) in the interior portions of the seams 34 to interfere with the bonding/fusion process.
  • the protective layer 68 is the same material as the liner layer 62 due to the folding at the fold line 72.
  • the protective layer 68 can again be the same material with no fold line 72 being shown due to the formation process wherein the area where the fold line 72 is located having been severed from the end product.
  • the protective layer 68 may be formed from a separate piece of material that is compatible with the liner layer 62. Once again it is desirable that the protective layer 68 extend down over the absorbent structure front top edge 40 and at least a portion of the body-facing side of the absorbent structure 38.
  • the protective layer 68 extends over the absorbent core longitudinal side edges 44 and into the areas where the side seams 34 will be formed between the front waist panel 24 and the rear waist panel 26. The same is true with respect to the rear waist panel protective layer 70 in the rear waist panel 26.
  • the overall height of the various layers can be varied relative to the front waist panel upper edge 76 and in the same fashion with respect to the rear waist panel layers and upper edge 78.
  • the garment layer 60, the liner layer 62 and the protective layer 68 all have a top edge.
  • the garment layer 60 is shorter in the Y or longitudinal direction as compared to the liner layer 62 and the protective layer 68 (both of which are the same length adjacent the waist opening 36) .
  • the top edge of the garment layer 60 does not align with the top edge of the liner layer 62 and the protective layer 68 which do align with one another to thus form a portion of the waist border 36.
  • the liner layer 62 is the tallest layer and the garment layer 60 and the protective layer 68 are shorter than the liner layer 62.
  • the garment layer 60 and the protective layer 68 may be the same length or different lengths with respect to one another.
  • the garment layer 60 and the liner layer 62 are the same height and form the front waist panel upper edge 76 which in turn forms the waist border 36.
  • the rear waist panel 26 can be formed in the same way as shown in Figures 3A and 5-9 with respect to the rear waist panel garment layer 64, rear waist panel liner layer 66, rear waist panel protective layer 70, rear waist panel fold line 74, and rear waist panel upper edge 78.
  • the garment layers 60, 64, the liner layers 62, 66 and the protective layers 68, 70 typically will be made from fibrous nonwoven webs.
  • Suitable nonwoven webs include staple fibers webs and more continuous fiber or filament webs such as are found in meltblown webs and spunbond webs.
  • Through air bonded carded staple fiber webs are particularly suitable for the garment layers 60 and 64 because such fibers as bicomponent fibers can be used which include polyethylene-based polymers for the sheaths to provide a softer feel and hand, while the cores of the bicomponent fibers can be made from such polymers as polypropylene and polyester (PET) to provide other properties such as rigidity and compression resilience.
  • PET polypropylene and polyester
  • the liner layers 62, 66 and protective layers 68, 70 can be made from, for example, spunbond webs or combinations of spunbond and meltblown webs which are typically made from polypropylene-based polymers.
  • the fibers being used for the garment layers are polyethylene-based (50 weight percent or greater of the polymer mix utilizes a polyethylene backbone) and some portion of the exterior surfaces of the fibers being used for the liner and protective layers are polypropylene-based (50 weight percent or greater of the polymer mix utilizes a polypropylenebackbone)
  • the designs of the present invention provide an economical solution to being able to provide one set of attributes in one area of the product versus another while still being able to form sufficiently strong side seams 34 in the end product.
  • the front and rear waist panel protective layers 68 and 70 each have a waist panel protective layer top edge 54a (which may or may not coincide with the front and rear waist panel top edges 54) , a waist panel protective layer lower edge 63, and a waist panel protective layer left side edge 56a and a waist panel protective layer right side edge 58a which can connect the top 54a and lower 63 edges and which are each respectively positioned inward of the waist panel left side edge 56 and waist panel right side edge 58 and thus closer to the longitudinal centerline 80 of the product.
  • the side seams 34 are less bulky and stiff because there are two less layers forming the seams 34.
  • the protective layer left and right side edges 56a and 58a are not a part of the side seaming process, they do not have to be made of a material that is compatible with the material forming the liner layers 62 and 66 which in turn take part in the fusion process when the side seams 34 are formed.
  • this modified protective layer with a non-compatible material it will have to be adhered to the underlying layer or layers with a suitable adhesive or other suitable means as is known in the art.
  • any number of bonding designs or patterns may be used. As mentioned previously, fusion of the layers may take place using conventional ultrasonic bonding equipment. Additionally, heated bonding rolls may be used in which one roll has a bonding pattern such as is shown in Figures 10 and 11 and the other roll may be a flat anvil roll. Alternatively, some portions of the bonding patterns may be placed on either roll such as in a male/female set of bonding rolls or, a first of the two rolls may have raised male patterns that contact a flat, anvil portion on the other, second roll and in the same fashion raised male patterns on the second roll may contact flat, anvil portions on the first roll.
  • the seam 34 has a bond pattern which includes an outboard longitudinal bonding line 34a and an inboard longitudinal bonding line 34b (the terms “outboard” and “inboard” being taken in relation to the relative closeness to the longitudinal centerline 80 of the product) . Traversing the portion of the seam 34 in between these two bonding lines 34a and 34b are a series of alternating lines of parallel bonding 34c and 34d. Lateral bond lines 34c may be narrower that lateral bond lines 34d and bond lines 34c may be raised and the bond lines 34d more depressed (or vice versa) with respect to the exterior front surface of the training pant 20. To further strengthen the seams 34 in Figure 10, a series of alternating inward diagonal bond lines 34e and outward diagonal bond lines 34f are included and they can be joined at an apex 34g is so desired.
  • FIG. 11 of the drawings An alternate bonding design is shown in Figure 11 of the drawings. It too contains an outboard longitudinal bonding line 34a and an inboard longitudinal bonding line 34b. Between the bonding lines 34a and 34b are a series of dot bonds 34h and flat bond areas 34i. The dots 34h are shown being offset on a diagonal from both the X and Y axes (lateral and longitudinal axes) . Both the size and spacing of the dots can be varied. In addition, the dots can be replaced with other shapes such as, for example, squares, ovals, polygons, stars, diamonds, etc.
  • FIG 12 there is shown an enlarged cross-sectional side view of an exemplary side seam 34 due to the bonding of the layers of the present invention including the waist elastic means 37, the auxiliary elastic means 39, the front waist panel garment layer 60, the front waist panel liner layer 62, the front waist panel protective layer 68, the rear waist panel protective layer 70, the rear waist panel liner layer 66 and the rear waist panel garment layer 64.
  • a plurality of exemplary side seam bond or fusion points 35 are shown joining the aforementioned layers together.
  • the fusion points 35 are shown as being laterally aligned with the elastics 37 and 39 but this is not a requirement.
  • the fusion bonds 35 can be offset from these elastics and/or there can be a combination of fusion bond points 35 some of which align with the elastics and others which do not.
  • the critical point is to achieve a good heat or fusion bond between the interior layers (62, 68, 70 and 66) which are all made from compatible polymers to effectuate a good seam between the front 24 and rear 26 waist panels.
  • the incompatible material of the garment layers 60 and 64 is also in the fusion process on the outsides of the seams 34 is not a problem because these layers are typically adhered to the adjacent non-compatible liner layers 62 and 66 by way of adhesive bonds which are sufficient in this area because they do not encounter the peel forces that the interior layers (62, 68, 70 and 66) encounter and so do not as directly affect the structural integrity of the seal and the functioning of the seams 34 and the resultant product during use.
  • Additional elastic means (not shown) , similar to the elastic means 37 and 39, may be employed between the protective layers 68, 70 and the respective liner layers 62, 66. These additional elastics can provide further vertical support for the training pant 20 to hold the product on the torso of the wearer.
  • FIG. 13-15 An additional variant of the embodiments is a modification of the design shown in Figures 13-15 of the drawings.
  • the front and rear waist panel protective layers 68, 70 are shown as having side edges 56a and 58a which are narrower that the waist panel side edges 56 and 58.
  • the side edges 56a and 58a do not extend into the pair of side seams 34.
  • the side edges of the waist panel liner layers 62 and 66 can be made narrower so that they do not extend into the side seams 34 while the waist panel protective layers 68, 70 can be made full size so they do extend into the side seams 34.
  • the side seams have a peel strength of at least about 450 grams force (gf) with a range of about 450 gf to about 5000 gf, alternatively from about 650 to about 3500 gf, and still further about 800 to about 2000 gf.
  • gf grams force
  • the garment layer 60, 64 is not compatible with the liner layer 62, 66 and/or the protective layer 68, 70
  • the peel strength between the garment layer and these layers will be less than the other layers.
  • the peel strength between the garment layer and either or both of the liner layer and the protective layer will be less than about 400 gf when the bonding technique for such layers is solely a fusion bond. Note however that the peel strength of such layers can be improved by the use of additional bonding methods such as adhesives.
  • the interior, body-facing layers of a training pant are made of polypropylene and the exterior, garment facing layers are made of a softer polymer such as polyethylene or bicomponent fibers with polyethylene sheaths and polypropylene or polyester cores
  • the layers will not be compatible in the context of forming sufficiently strong side seams 34.
  • the softer layer is the body-facing layer.
  • One way to determine this strength is to perform a peel strength test of the side seams 34 in accordance with the following test procedure.
  • This procedure is a tensile strength bench test to measure the force required to separate a fusion-bonded seam that joins the front and rear side panels.
  • the bonded seam can be formed from a pattern of bond points or small bonded regions such as are described herein.
  • the force of separation is measured by determining load values as the two waistpanel materials are pulled apart perpendicular to their plane of contact.
  • the test values are an indication of how strongly the waist panels are adhered together, and how difficult it would be for a consumer to separate the side seams fusion bonding the front and rear side panels when incorporated into a product, such as the side seam of a disposable training pant.
  • the sample is pulled in the tensile tester until the sample pulls apart. Bond strength is the peak load result as measured in grams force.
  • a material sample of two waist panel layers joined by a bond such as heat and pressure bond is assembled.
  • the sample is prepared by aligning and bonding the materials of the front and rear side panel together.
  • the sample is cut out of a product with the side seam in the middle of the cut strip.
  • the sample is cut adjacent the waist opening and includes the waist border and has a circumferential width (parallel to the transverse or X axis of the product) of 6 inches (15.24 centimeters) by 1 inch (2.54 centimeters) .
  • the sample is then placed between clamps on a tensile tester. One piece of material is held in the upper clamp, while the other is held in the lower clamp.
  • the bond is arrayed between the clamps, approximately parallel to the edges of the clamp faces.
  • the width of all materials to be tested is 1 inch (25.4 mm) .
  • the gage length is 2 inches (50.8 mm) between the edges of the clamp faces.
  • the term "load” refers to the gram force value measured by the load cells in the tensile tester.
  • the jaws are separated at a controlled rate until the side seam fusion bond is pulled apart.
  • the load values generated throughout this process are recorded.
  • the peak load value is recorded as the bond or peel strength.
  • Peak load values for samples of non-standard widths should be normalized by multiplying or dividing by the factor by which the sample width deviates from 1 inch (25.4 mm) .
  • the peak load value derived by pulling apart a 0.5 inch (12.7 mm) wide sample should be multiplied by 2.
  • Constant Rate of Extension (CRE) tensile tester such as an MTS tensile tester model Synergie 200 Test Bed; available from MTS. RTM. Systems Corporation, Research Triangle Park, N.C. USA.
  • Load cells A suitable cell selected so the majority of the peak load values fall between 10 and 90% of the manufacturer's recommended ranges of load cell's full scale value; for example, Model 100N available from MTS. RTM. Systems Corporation, Research Triangle Park, N.C. USA.
  • Operating software and data acquisition system such as MTS TestWorks. RTM. for Windows software version 4; available from MTS. RTM. Systems Corporation, Research Triangle Park, N.C. USA.
  • Grips pneumatic-action grips, top and bottom, identified as part number 38.00716 available from MTS Systems Corporation.
  • Grip faces 25 by 75-mm (1 by 3-inch) interlocking faces such as are available from MTS Systems Corporation.
  • Specimens may be assembled from raw materials or removed from intact products.
  • a waist panel specimen is taken by removing a 1 inch (2.54 centimeter) by 6 inch (15.24 centimeter) rectangular piece, in which the bond is centered in and perpendicular to the 6 inch (15.24 centimeter) dimension.
  • the long dimension of the specimen should correspond to the circumferential dimension of the garment and the specimen should be cut so that one of the long edges of the specimen includes the waist opening edge.
  • Raw material specimens may be assembled by combining materials that would serve as the front and rear waist panels of the product. Each material should be cut to at least 1 inch (2.54 cm) by 6 inches (15.24 cm) , with the long dimension corresponding to the circumferential dimension of a garment that would be made therefrom. Materials are then joined in a manner such as is described herein using heat and pressure or ultrasonics to form a representative side seam.
  • the specimen is tested using the tensile test procedure that follows; the specimen is tested with the side seam centered between and parallel to the grips of the testing apparatus. At least four specimens of each sample should be tested, and the results averaged.
  • Gage length 2 inches (50.8 mm)
  • the specimen's vertical edges should be perpendicular to the nearest edges of the grip faces, and the bond should be parallel to the edges of the faces.
  • J.Data are reported as the average peak load value in grams force for each sample.
  • the garment layers of the front and rear waist panels were made from through air bonded carded webs utilizing 2 denier, 38 millimeter long, bicomponent staple fibers having polyethylene sheaths and polyester cores with a basis weight of 20 grams per square meter (gsm) .
  • the liner layers and protective layers of the front and rear waist panels were made from 2 denier polypropylene spunbond with a basis weight of 15 gsm.
  • the conventional three-piece design training pant used a conventional folding technique where the garment layer was folded over and on top of the absorbent structure on the body side of the product.
  • the side seams were formed using heated bonding rolls (135 degrees Celsius and 15 kilograms force of pressure) with a bond pattern such as is shown in Figure 10 of the drawings.
  • the conventional design training pant was compared to a design according to the present invention with the same garment, liner and protective layers as were used with the conventional design.
  • the bonding pattern, temperature and bonding pressure were also the same as with the conventional product.
  • the difference was that the liner layer (as opposed to the garment layer) was folded over on itself towards the body side of the absorbent structure to form the waist panel protective layer covering the top edge of the absorbent structure instead of the garment layer as in the conventional design.
  • the side seams were formed there was no garment layer on the interior of the side seams.
  • the average side seam strength for the conventional folding and bonding technique (Table 1) was is in the range of 410 and 414 gf while the average side seam strength for the present invention utilizing the same materials (Table 2) was in the range of 970 and 976 gf, an increase in average side seam strength of over two and one third times the conventional valuesand over two times the strength even at the minimum values.
  • Table 1 the average side seam strength for the conventional folding and bonding technique
  • Table 2 was in the range of 970 and 976 gf

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

Abstract

L'invention concerne une couche culotte absorbante pour enfant (20). La culotte (20) comprend une structure (22) présentant une région taille avant (23) munie d'un panneau avant (24), une région taille arrière (25) munie d'un panneau taille arrière (26), et une région entrejambe (27) munie d'un panneau entrejambe (28) s'étendant entre les panneaux avant et arrière. Une ouverture pour la taille (30) et une paire d'ouvertures pour les jambes (32) sont formées par assemblage sélectif du panneau taille avant (24) et du panneau taille arrière (26) au niveau des coutures latérales (34) sur les côtés latéraux de la culotte (20). Les coutures latérales (34) s'étendent entre l'ouverture pour la taille (30) et les ouvertures pour les jambes (32) respectives. Une bordure de taille (36) entoure la périphérie de l'ouverture pour la taille (30), et est formée en assemblant le panneau taille avant (24) au panneau taille arrière (26) au niveau des coutures latérales (34).
PCT/CN2015/077143 2015-04-22 2015-04-22 Article absorbant doté de panneaux taille et de coutures latérales améliorés WO2016168997A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2015392253A AU2015392253B2 (en) 2015-04-22 2015-04-22 Absorbent article with improved waist panels and side seams
PCT/CN2015/077143 WO2016168997A1 (fr) 2015-04-22 2015-04-22 Article absorbant doté de panneaux taille et de coutures latérales améliorés
CN201580078722.1A CN107405218B (zh) 2015-04-22 2015-04-22 具有改进的腰部裁片和侧接缝的吸收制品

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PCT/CN2015/077143 WO2016168997A1 (fr) 2015-04-22 2015-04-22 Article absorbant doté de panneaux taille et de coutures latérales améliorés

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WO2018152831A1 (fr) * 2017-02-27 2018-08-30 The Procter & Gamble Company Article à porter comportant une ceinture élastique
WO2018152994A1 (fr) * 2017-02-27 2018-08-30 The Procter & Gamble Company Substrat non tissé pour articles portables
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WO2018152833A1 (fr) * 2017-02-27 2018-08-30 The Procter & Gamble Company Article pouvant être porté comportant une ceinture élastique
WO2018152831A1 (fr) * 2017-02-27 2018-08-30 The Procter & Gamble Company Article à porter comportant une ceinture élastique
WO2018152994A1 (fr) * 2017-02-27 2018-08-30 The Procter & Gamble Company Substrat non tissé pour articles portables
WO2018153106A1 (fr) * 2017-02-27 2018-08-30 The Procter & Gamble Company Article absorbant à ceinture élastique
WO2018152830A1 (fr) * 2017-02-27 2018-08-30 The Procter & Gamble Company Article pouvant être porté ayant des propriétés de matériau caractéristiques
CN110290772A (zh) * 2017-02-27 2019-09-27 宝洁公司 具有弹性带的吸收制品
CN110312496A (zh) * 2017-02-27 2019-10-08 宝洁公司 可穿着制品的非织造基底
CN110325155A (zh) * 2017-02-27 2019-10-11 宝洁公司 具有特征材料特性的可穿着制品
CN110325160A (zh) * 2017-02-27 2019-10-11 宝洁公司 具有弹性带的可穿着制品
JP2020508145A (ja) * 2017-02-27 2020-03-19 ザ プロクター アンド ギャンブル カンパニーＴｈｅ Ｐｒｏｃｔｅｒ ＆ Ｇａｍｂｌｅ Ｃｏｍｐａｎｙ 特徴的な材料特性を有する着用可能物品
JP2020508141A (ja) * 2017-02-27 2020-03-19 ザ プロクター アンド ギャンブル カンパニーＴｈｅ Ｐｒｏｃｔｅｒ ＆ Ｇａｍｂｌｅ Ｃｏｍｐａｎｙ 弾性ベルトを有する着用可能物品
JP2020508140A (ja) * 2017-02-27 2020-03-19 ザ プロクター アンド ギャンブル カンパニーＴｈｅ Ｐｒｏｃｔｅｒ ＆ Ｇａｍｂｌｅ Ｃｏｍｐａｎｙ 弾性ベルトを有する着用可能物品
CN110312496B (zh) * 2017-02-27 2022-01-28 宝洁公司 可穿着制品的非织造基底
CN110325160B (zh) * 2017-02-27 2022-04-08 宝洁公司 具有弹性带的可穿着制品
US11389340B2 (en) 2017-02-27 2022-07-19 The Procter & Gamble Company Wearable article having elastic belt
CN110325155B (zh) * 2017-02-27 2022-07-29 宝洁公司 具有特征材料特性的可穿着制品
US11426310B2 (en) 2017-02-27 2022-08-30 The Procter & Gamble Company Absorbent article having elastic belt
US11622894B2 (en) 2017-02-27 2023-04-11 The Procter & Gamble Company Absorbent article having elastic belt
US11730640B2 (en) 2017-02-27 2023-08-22 The Procter & Gamble Company Nonwoven substrate for wearable articles
US11931234B2 (en) 2017-02-27 2024-03-19 The Procter & Gamble Company Wearable article having characteristic material properties
US12279938B2 (en) 2017-02-27 2025-04-22 The Procter & Gamble Company Wearable article having elastic belt

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