Absorbent article

Abstract

An absorbent article is disclosed, the absorbent article comprising: a front elastic band extending laterally between the pair of side seams; the rear elastic band transversely extends between the pair of side seams; the crotch region longitudinally extends between the front elastic band and the rear elastic band; and an absorbent body extending throughout the longitudinal dimension of the crotch region and further partially extending into each of the front elastic band and the rear elastic band, the absorbent body comprises a liquid permeable topsheet, a liquid impermeable backsheet, and a region of absorbent material sandwiched between the liquid permeable topsheet and the liquid impermeable backsheet, the absorbent body having a maximum lateral dimension W2 that is from 22% to 50% of a lateral dimension W1 of the rear elastic band.

Description

Technical Field

[0001] The utility model relates to a trousers-type absorbent product, which has protective measures for preventing low-viscosity body exudates from leaking and maintains other functions as a trousers-type wearable product. Background Art

[0002] Infants and other individuals wear absorbent articles such as diapers to receive and contain urine and other body exudates. Pull-on absorbent articles or pant-type absorbent articles are those that are worn by inserting the wearer's legs into the leg openings and pulling the article into position around the lower body. Pants-type absorbent articles with protective measures to prevent low-viscosity body exudates from leaking through the waist opening are known, for example in WO2021 / 169166A.

[0003] Pants-type articles can adopt various structures, in which the circumference of the waist opening and its vicinity are sufficiently elastic to facilitate the wearer or caregiver to unfold the article and insert the wearer's legs into the leg openings to wear the article. Therefore, based on the structural limitations of the article, pants-type articles only provide a very small range of size adjustment or body configuration adjustment. Therefore, pants-type articles are usually constructed to adapt to the range of sizes and configurations by providing elastic bands that are very stretchable and very comfortable to wear, and have reliable fit so that sufficient sagging and urine leakage protection can be provided. It is expected that such basic functions of the elastic bands can be maintained even when the aforementioned protective measures are introduced.

[0004] Based on the foregoing, there is a need for an absorbent article that provides protection against leakage of low viscosity body exudates from the waist opening while maintaining good fit, comfort during wear, urine leakage resistance, and softness. There is also a need to provide such an absorbent article that can be economically manufactured. Utility Model Content

[0005] The utility model relates to an absorbent product with a longitudinal direction, a transverse direction, a pair of side seams and a pair of leg openings, comprising:

[0006] a front elastic band extending laterally between the pair of side seams;

[0007] a rear elastic band extending laterally between the pair of side seams;

[0008] a crotch region extending longitudinally between the front elastic band and the rear elastic band; and

[0009] an absorbent body extending over the entire longitudinal dimension of the crotch region and further extending partially into each of the front elastic belt and the back elastic belt, the absorbent body comprising a liquid-permeable top sheet, a liquid-impermeable back sheet and an absorbent material area sandwiched between the liquid-permeable top sheet and the liquid-impermeable back sheet, the absorbent body having a maximum transverse dimension W2,

[0010] The maximum transverse dimension W2 is about 22% to about 50% of the transverse dimension W1 of the rear elastic band;

[0011] the back elastic belt is divided into a back waist region, a protection region and a hip region arranged from a distal edge to a proximal edge, each region spanning in the transverse direction and a percentage relative to the longitudinal dimension LS of the side seam is defined by its position from the distal edge to the proximal edge, wherein an elastic member is provided on each of the back waist region, the protection region and the hip region,

[0012] The protection zone includes a main portion and a waist protection portion overlapping each other, the waist protection portion extending from a laterally extending closed end line toward the opening edge toward the crotch region, wherein the waist protection portion is partially bonded to the main portion to define a pair of closed side lines, wherein a pocket is formed by the closed end line, the pair of closed side lines and the opening edge, the pocket having an area A2, the area A2 being about 5% to about 15% of the rear elastic band having an area A1; and the closed end line is positioned proximal to the rear distal edge of the chassis;

[0013] The waist protection portion includes a waist protection elastic portion, and a main portion overlapping the waist protection elastic portion is defined as a related portion.

[0014] The present disclosure also includes the following embodiments:

[0015] Embodiment 1. An absorbent article having a longitudinal direction, a transverse direction, a pair of side seams, and a pair of leg openings, the absorbent article comprising:

[0016] a front elastic band extending laterally between the pair of side seams;

[0017] a rear elastic band extending laterally between the pair of side seams;

[0018] a crotch region extending longitudinally between the front elastic belt and the back elastic belt; and

[0019] an absorbent body extending over the entire longitudinal dimension of the crotch region and further extending partially into each of the front elastic belt and the back elastic belt, the absorbent body comprising a liquid permeable top sheet, a liquid impermeable back sheet, and an absorbent material area sandwiched between the liquid permeable top sheet and the liquid impermeable back sheet, the absorbent body having a maximum transverse dimension W2, the maximum transverse dimension W2 being from about 22% to about 50% of the transverse dimension W1 of the back elastic belt;

[0020] the rear elastic band being divided into a rear waist region, a protection region and a hip region arranged from a distal edge to a proximal edge, each region spanning in the transverse direction and defined by its position from the distal edge to the proximal edge as a percentage of the longitudinal dimension LS of the side seam, wherein the elastic member is provided on each of the rear waist region, the protection region and the hip region,

[0021] The protection zone includes a main portion and a waist protection portion overlapping each other, the waist protection portion extending from a laterally extending closed end line toward the crotch region toward the opening edge, wherein the waist protection portion is partially bonded to the main portion to define a pair of closed side lines, wherein a pocket is formed by the closed end line, the pair of closed side lines and the opening edge, the pocket having an area A2, the area A2 being about 5% to about 15% of the rear elastic band having an area A1; and the closed end line is positioned proximal to the rear distal edge of the chassis;

[0022] The waist protection portion includes a waist protection elastic portion, and the main portion overlapping the waist protection elastic portion is defined as a related portion.

[0023] Embodiment 2. An absorbent article according to embodiment 1, wherein the closed side line is not

[0024] The bottom sheets are stacked.

[0025] Embodiment 3. An absorbent article according to embodiment 2, wherein the pocket has a transverse

[0026] Dimension W3, wherein W3 / W1 is from about 15% to about 60%.

[0027] Embodiment 4. The absorbent article according to embodiment 2, comprising:

[0028] the distance W4 between the side edge of the absorbent body and the nearest transverse edge of the rear belt in the protection zone, and

[0029] the distance W5 between the side edge of the absorbent body in the protective area and the nearest closed side line,

[0030] Wherein W5 / W4 is about 5% to about 30%.

[0031] Embodiment 5. An absorbent article according to embodiment 1 or 2, wherein the protection zone is set within a position of about 15% to about 80% of LS when the distal edge of the side seam is considered to be 0% and the proximal edge of the side seam is considered to be 100%.

[0032] Embodiment 6. An absorbent article according to embodiment 1 or 2, wherein the pocket has

[0033] A longitudinal dimension LP, wherein LP is about 15% to about 45% of LS.

[0034] Embodiment 7. An absorbent article according to embodiment 1 or 2, wherein the rear elastic belt

[0035] It is formed by an inner sheet, an outer sheet, a first outer sheet folded portion, a second outer sheet folded portion, a first plurality of elastic strands, and a second plurality of elastic strands,

[0036] wherein the longitudinal dimension of the second outer sheet fold is defined by a first waist fold point and a second waist fold point, wherein the first plurality of elastic strands are sandwiched between the first outer sheet fold and the second outer sheet fold, and the second plurality of elastic strands are sandwiched between the inner sheet and the outer sheet,

[0037] The first outer sheet folded portion, the second outer sheet folded portion and the first elastic strand form the waist protection elastic portion.

[0038] Embodiment 8. An absorbent article having a longitudinal direction, a transverse direction, a pair of side seams having a longitudinal dimension LS, and a pair of leg openings, the absorbent article comprising:

[0039] a front strap extending laterally between the pair of side seams;

[0040] a rear strap extending laterally between the pair of side seams;

[0041] a crotch region extending longitudinally between the front elastic belt and the back elastic belt; and

[0042] an absorbent body extending over the entire longitudinal dimension of the crotch region and further extending partially into each of the front elastic belt and the back elastic belt, the absorbent body comprising a liquid permeable top sheet, a liquid impermeable back sheet, and an absorbent material area sandwiched between the liquid permeable top sheet and the liquid impermeable back sheet, the absorbent body having a maximum transverse dimension W2, the maximum transverse dimension W2 being from about 22% to about 50% of the transverse dimension W1 of the back elastic belt;

[0043] The rear elastic band is formed by an inner panel, an outer panel, a first outer panel fold, a second outer panel fold, a first plurality of elastic strands, and a second plurality of elastic strands,

[0044] wherein the longitudinal dimension of the second outer sheet fold is defined by a first waist fold point and a second waist fold point, wherein the first plurality of elastic strands are sandwiched between the first outer sheet fold and the second outer sheet fold, and the second plurality of elastic strands are sandwiched between the inner sheet and the outer sheet,

[0045] The first outer sheet fold, the second outer sheet fold and the first elastic strand form a waist protection elastic portion, wherein the waist protection elastic portion has a longitudinal dimension defined by the distance between the first waist fold point and the first elastic strand positioned at the farthest side, wherein the waist protection elastic portion is partially bonded to the remainder of the back band to define a pair of closed side lines and a non-bonded area between the closed side lines, the distance between the closed side lines having a transverse dimension W3, wherein W3 / W1 is about

[0046] 15% to about 60%, and wherein the closed side line does not overlap the backsheet.

[0047] Embodiment 9. An absorbent article according to embodiment 1 or 8, wherein the waist protective elastic portion is arranged within a position of about 40% to about 80% of LS when the distal edge of the side seam is considered to be 0% and the proximal edge of the side seam is considered to be 100%.

[0048] Embodiment 10. The absorbent article according to embodiment 1 or 8, wherein the waist protection elastic portion has a longitudinal dimension LE, wherein LE is from about 5% to about 21% of LS.

[0049] Embodiment 11. An absorbent article according to embodiment 1 or 8, wherein the absorbent article includes an elastic covering, which extends over the entire longitudinal dimension of the article and includes the front elastic band and the rear elastic band, and the absorbent body has a maximum transverse dimension W2, wherein the elastic covering has a minimum transverse dimension W6, and the minimum transverse dimension W6 is about 110% to about 150% of W2.

[0050] Embodiment 12. An absorbent article according to embodiment 7 or 8, wherein the rear elastic band includes an unattached area between the second outer sheet fold and the main part, wherein the unattached area is free of any attachment, the unattached area having a longitudinal dimension of at least 8 mm and extending across the entire transverse dimension.

[0051] Embodiment 13. An absorbent article according to embodiment 1 or 8, wherein the absorbent body comprises a pair of inner cuffs, wherein the inner cuffs are in a dynamic elastic state at the points where they intersect the proximal edge of the waist protection portion.

[0052] Embodiment 14. An absorbent article according to embodiment 1 or 8, wherein the waist protection

[0053] The tensile stress of the elastic portion is about 125% to about 180% of the tensile stress of the relevant portion. Embodiment 15. The absorbent article according to embodiment 1 or 8, wherein the waist protection elastic portion is elasticized by arranging a plurality of elastic strands, wherein the elastic strand positioned on the most proximal side is arranged not less than about 2 mm to about 5 mm from the edge of the opening.

[0054] Embodiment 16. The absorbent article according to embodiment 15, wherein the plurality of elastic strands of the waist protection elastic portion are arranged at a spacing of no more than about 12 mm, preferably no more than about 10 mm.

[0055] Embodiment 17. The absorbent article according to embodiment 15, wherein at least 2 of the elastic strands of the waist protection elastic portion have a color visible from the body-facing side of the article.

[0056] Embodiment 18. An absorbent article according to embodiment 1 or 8, wherein the total thickness of the waist protection elastic portion, the related portion and the portion of the absorbent body sandwiched between the waist protection elastic portion and the related portion does not exceed about 5 mm.

[0057] Embodiment 19. An absorbent article according to Embodiment 1 or 8, wherein the waist force measured according to the whole product force value herein is no more than about 9N, preferably no more than about 8N.

[0058] Embodiment 20. A method of demonstrating the vapor permeability of an absorbent article according to embodiment 18 in an ambient environment, wherein the method comprises the steps of:

[0059] 1) providing a steam supply source, the steam supply source supplies steam at a temperature of about 35°C to about 95°C, preferably about 45°C to about 85°C, in a direction opposite to gravity;

[0060] 2) placing the wearer-facing side of at least a portion of the waist protection elastic portion in a position capable of receiving the steam from the steam supply source;

[0061] 3) placing a shape memory object having a deformation temperature of at least 30° C. on the garment-facing side of the location receiving the steam, wherein the time of placing the shape memory object is considered as the starting time; and

[0062] 4) allowing the shape memory object to deform, wherein the deformation begins within about 10 seconds, preferably within about 5 seconds, from the start time, and the deformation is completed within about 2 to about 30 seconds, preferably within about 3 to about 10 seconds, from the start of the deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] While this specification concludes with claims particularly pointing out and distinctly claiming the invention, which are considered to form a part hereof, it is believed that the invention will be better understood from the following description taken in conjunction with the accompanying drawings, wherein like reference numerals are used to designate substantially identical elements, and wherein:

[0064] Figure 1 It is a perspective view of one embodiment of an absorbent article of the present invention.

[0065] Figure 2A is a schematic plan view of one embodiment of an absorbent article of the present invention showing the garment-facing surface with the side seams removed and in a flat, uncontracted state.

[0066] Figure 2B is a schematic plan view of another embodiment of an absorbent article of the present invention showing the body-facing surface with the side seams removed and in a flat, uncontracted state.

[0067] FIG. 3A to FIG. 3C for Figure 2A Schematic plan view of a back elastic belt of , showing the body-facing surface with the seam unjoined and in a flat, uncontracted state.

[0068] Figure 4 It is taken along line L2 Figure 2A and FIG. 3A to FIG. 3CSchematic cross-sectional view of an embodiment of , in which the thickness dimension is exaggerated.

[0069] Figure 5 is a schematic diagram of an example of a hanger-type sample fixing fixture according to the "Full Product Force Measurement" of this article.

[0070] FIG. 6A to FIG. 6B is a schematic diagram of an example of a vapor permeability demonstration and a shape memory object that can be used for such a demonstration.

[0071] definition

[0072] As used herein, the following terms shall have the meanings specified below:

[0073] "Absorbent article" refers to a wearable article that may be in the form of a pant, taped diaper, incontinence briefs, feminine hygiene underwear, etc., which is configured to also absorb and contain various exudates, such as urine, feces, and menstrual fluid discharged from the body. "Absorbent article" can be used as an outer cover that can be adapted to be joined with a separate disposable absorbent insert for providing absorption and containment functions, such as those disclosed in PCT Publication WO 2011 / 087503A.

[0074] "Pants" refers to disposable absorbent articles having a pre-formed waist opening and leg openings. Pants can be put on by inserting the wearer's legs into the leg openings and pulling the pants into position around the wearer's lower torso. Pants are also commonly referred to as "closed diapers", "pre-fastened diapers", "pull-on diapers", "training pants" and "diaper pants".

[0075] "Longitudinal" means the direction extending substantially perpendicularly from one waist edge to the opposite waist edge of the article and generally parallel to the greatest linear dimension of the article.

[0076] "Transverse" refers to a direction perpendicular to the longitudinal direction.

[0077] "Proximal" and "distal" refer to locations closer to or farther from, respectively, the longitudinal center of the article.

[0078] "Body-facing" and "garment-facing" refer to the relative position of an element or the relative position of surfaces of an element or a group of elements, respectively. "Body-facing" means that the element or surface is closer to the wearer during wear than some other elements or surfaces. "Garment-facing" means that the element or surface is farther from the wearer during wear than some other elements or surfaces (i.e., the element or surface is near the wearer's clothing, which may be worn over a disposable absorbent article).

[0079] "Disposed" means that an element is located in a specific position or location.

[0080] "Joined" refers to configurations in which one element is directly secured to another element by being directly attached to the other element; it also refers to configurations in which one element is indirectly secured to another element by being attached to an intermediate member which is then attached to the other element.

[0081] "Film" refers to a sheet of material in which the length and width of the material greatly exceed the thickness of the material. Typically, a film has a thickness of about 0.5 mm or less.

[0082] "Water-permeable" and "water-impermeable" refer to the permeability of a material within the range of intended use of a disposable absorbent article. Specifically, the term "water-permeable" refers to a layer or layered structure having pores, openings and / or interconnected void spaces that allow liquid water, urine or synthetic urine to penetrate through its thickness in the absence of applied pressure. Conversely, the term "water-impermeable" refers to a layer or layered structure wherein liquid water, urine or synthetic urine cannot penetrate through the thickness of the layer or layered structure in the absence of applied pressure (other than natural forces such as gravity). According to this definition, a water-impermeable layer or layered structure may be permeable to water vapor, i.e., may be "vapor-permeable".

[0083] "Extensibility" and "extensible" mean that the width or length of a component in a relaxed state can be extended or increased.

[0084] "Elasticated" and "elasticized" mean that the component includes at least a portion made of an elastic material.

[0085] "Extensible material," "extensible material," or "stretchable material" are used interchangeably and refer to a material that, upon application of a biasing force, can be stretched to an elongated length of at least about 110% of its relaxed initial length (i.e., can be stretched to more than 10% of its initial length) without rupturing or breaking, and exhibits minimal recovery upon release of the applied force, i.e., recovers less than about 20% of its elongation without completely rupturing or breaking, as measured by EDANA method 20.2-89. In the event that such an extensible material recovers at least 40% of its elongation upon release of the applied force, the extensible material will be considered "elastic" or "elastomeric." For example, an elastic material having an initial length of 100 mm can extend to at least 150 mm, and upon removal of the force it retracts to a length of at least 130 mm (i.e., exhibits 40% recovery). In the event that the material recovers less than 40% of its elongation upon release of the applied force, the extensible material will be considered "substantially inelastic" or "substantially non-elastomeric." For example, an extensible material having an initial length of 100 mm may extend to at least 150 mm and retract to a length of at least 145 mm when the force is removed (ie, exhibit a 10% recovery).

[0086] Unless otherwise specified, the "size", "length", "width", "pitch", "diameter", "aspect ratio", "angle" and "area" of the article are measured as follows: the article is stretched to the fully stretched circumference W1, which is measured according to the "full article force value measurement" in this article and using a ruler or a small magnifying glass.

[0087] "Observation original image" refers to the visual representation that can be observed by the naked eye, provided by printing or other means and has color. Printing includes various methods and equipment well known to those skilled in the art, such as lithography, screen printing, flexographic printing and gravure inkjet printing.

[0088] As referred to herein, "color" or "colored" includes any primary color other than white, i.e., black, red, blue, violet, orange, yellow, green, and indigo, and any variation thereof or mixture thereof. According to the CIE L*a*b* color system, white is defined as those colors having an L* value of at least 94, an a* value equal to 0±2, and a b* value equal to 0±2. DETAILED DESCRIPTION

[0089] Figure 1 is a perspective view of an absorbent article (20) of the present invention, and Figure 2Ais a schematic plan view of an absorbent article showing the garment-facing surface with the side seams (32) unjoined and removed and the article in its flat, uncontracted state. The absorbent article (20) has a longitudinal centerline L1 which also serves as a longitudinal axis, and a transverse centerline T1 which also serves as a transverse axis. The absorbent article (20) has a body-facing surface, a garment-facing surface, a front elastic band (84), a back elastic band (86), a crotch region (30), and side seams (32) joining the front elastic band (84) and the back elastic band (86) to form two leg openings and a waist opening. Figure 2A , the side edges (89) of the front and back elastic bands (84, 86) represent the inner edges of the side seams (32).

[0090] The absorbent article (20) may be Figure 1 and Figure 2A The one-piece pants shown are constructed so that the garment-facing layer of the absorbent body (38) is common to the garment-facing layers of the front elastic band and the back elastic band (84, 86). For the one-piece pants, the portions extending in the transverse direction between the longitudinally extending side seams (32) are the front region (26) and the back region (28), respectively, and the remaining portion with curved side edges is the crotch region (30), wherein the front elastic band (84) matches the front region (26), and the back elastic band (86) matches the back region (28). The absorbent article (20) can be as follows Figure 2B The belted pants shown are formed of three separate parts forming the front region (26), the back region (28) and the absorbent body (38). For belted pants, the front elastic band (84) and the back elastic band (86) are parts extending in the transverse direction between the longitudinally extending side seams (32), so the attachment present near the side seams (32) is not considered to be the back elastic band (86). For one-piece pants or belted pants, the distal edge of the side seams (32) is considered to be the distal edge (88), and the proximal edge of the side seams (32) is considered to be the proximal edge (90). The distal edge 88 matches the waist opening.

[0091] The absorbent body (38) includes a top sheet, a back sheet, and an absorbent material area (62) disposed between the top sheet and the back sheet. The top sheet may be a water-permeable substrate. The back sheet may be a water-impermeable film. The absorbent body (38) includes an absorbent material area (62) and an absorbent material-deficient area (61), the absorbent material area being used to absorb and contain body exudates placed on the absorbent body (38), the absorbent material-deficient area surrounding the absorbent material area (62). The area adjacent to the front longitudinal end edge and the rear longitudinal end edge of the absorbent body (38) includes the back sheet. The area (61) where no absorbent material is present may be made only of the top sheet and the back sheet and the optional hoop material as described below. As Figure 2A and Figure 2BAs shown in the embodiment of , the absorbent body (38) may have a generally rectangular shape, left and right longitudinally extending side edges (48), and front and rear transversely extending end edges (50). Figure 2B As shown, the absorbent material area (62) may have a generally hourglass shape. The absorbent material area (62) may be present in the entire longitudinal dimension of the crotch region and extend at least partially in the front and rear regions (26, 28). The backsheet may extend over the entire area of ​​the absorbent body (38). The absorbent body has a maximum transverse dimension W2 that is about 22% to about 50% of the transverse dimension W1 of the rear elastic band. For belt-type pants, the absorbent body (38) may also include an outer covering layer (not shown) for covering the garment-facing side of the backsheet. The outer covering layer may be a nonwoven sheet.

[0092] refer to Figure 1 and Figure 2A A preferred embodiment of the pants-type article of the utility model is a one-piece article, which includes an elastic cover (40) extending over the entire longitudinal dimension of the article and an absorbent body (38), wherein the elastic cover (40) includes a front elastic band (84) and a rear elastic band (86). The elastic cover (40) may include a shaped crotch area, which forms the leg openings. The elastic cover (40) may have a minimum transverse dimension W6 in the crotch area. By providing such a shaped crotch area, the elastic cover (40) provides good fit and comfortable wearing feeling around the leg openings. In addition, by providing a shaped crotch area to form the leg openings, the absorbent body (38) can be set to have a smaller transverse dimension than the elastic cover (40), which also contributes to a comfortable wearing feeling. In addition, by providing an absorbent body (38) with a smaller transverse dimension, the absorbent body (38) can be made to fit more closely to the wearer, especially the area (62) where the absorbent material is present can fit more closely to the wearer, thereby achieving good treatment of liquid exudates. The minimum transverse dimension W6 of the elastic cover (40) may be from about 110% to about 150% of the maximum transverse dimension W2 of the absorbent body (38). Figure 2A and Figure 2B The absorbent body (38) may be rectangular in shape, i.e. having a uniform transverse dimension W2 along its entire length. The shaped crotch region of the elastic cover (40) may also include curved leg elastic members (65) for forming leg opening cuffs (64) along the leg openings, such as Figure 1 shown.

[0093] The absorbent material zone (62) may include an absorbent layer and a collection layer. The absorbent layer is an area in which absorbent materials with high retention capacity, such as superabsorbent polymers, are present. The absorbent layer may be substantially free of cellulose. The superabsorbent polymer of the absorbent layer may be disposed between a first material layer and a second material layer fixed by a fiber layer of thermoplastic adhesive material. The first material layer and the second material layer may be nonwoven fiber webs, including synthetic fibers, such as single-component fibers of PE, PET and PP, multi-component fibers such as side-by-side, core / skin or island-in-the-sea fibers. Such synthetic fibers may be formed via a spunbond process or a meltblown process. The collection layer facilitates the collection and distribution of body exudates and may be placed between the top sheet and the absorbent layer. The collection layer may include cellulose fibers.

[0094] The absorbent layer may be provided with a plurality of absorbent material zones (62). Portions of the absorbent layer may be configured to be substantially free of absorbent material to form a channel or channels. The channels may be used to enable the absorbent material zones (62) to flex when swollen with a fluid, so that the absorbent article conforms to the body of the wearer after swelling and prevents the article from sagging. The channels may also be formed in the acquisition layer and may be configured to at least partially match the channels of the absorbent layer in the thickness direction.

[0095] Alternatively, the absorbent material area (62) may include a high loft material containing superabsorbent polymers. The term "high loft" refers to a low density loose fabric compared to a flat paper fabric. High loft fiber webs are characterized by a relatively high porosity. This means that there is a relatively high amount of void space in which superabsorbent polymer particles can be distributed. The high loft material (without superabsorbent particles) may have a density of less than 0.20 g / cm at a pressure of 4.14 kPa (0.6 psi). 3 The density is 0.05 g / cm 3 Up to 0.15g / cm 3 The high loft layer (without superabsorbent particles) may have a density of less than 0.20 g / cm at a pressure of 2.07 kPa (0.3 psi). 3 , especially at 0.02g / cm 3 Up to 0.15g / cm 3 The high loft layer (without superabsorbent particles) may have a density of less than 0.15 g / cm at a pressure of 0.83 kPa (0.12 psi). 3 , especially 0.01g / cm 3 Up to 0.15g / cm 3 A density in the range of 15 gsm to 500 gsm, preferably 30 gsm to 200 gsm, such as those described in US 2021 / 0361497 Al. The absorbent material zone (62) comprising high loft material comprising superabsorbent polymers may also comprise channels.

[0096] Reference Figure 1 The elastic covering (40) may include curved leg elastics for forming leg opening cuffs (64) along the leg openings, the outer cuffs being made of the same material as the elastic covering (40). Figure 3A As shown, the absorbent body (38) may include inner leg cuffs (66) made of a material having a high fluid impermeability and elasticized to provide a barrier along both transverse edges of the absorbent body (38). Such inner leg cuffs (66) may be attached to the rest of the absorbent body by bonding them, for example, to the top sheet at both longitudinal edges of the absorbent body (38), so that at least in the crotch region (30), the inner leg cuffs (66) are in active elasticity to provide a gusset around the leg openings.

[0097] The front elastic band and the back elastic band (84, 86) of the article of the utility model play a role in dynamically generating fit forces and distributing dynamically generated forces during wearing. The front elastic band and the back elastic band (84, 86) are joined to each other outside the side edges (89) to form side seams (32), a waist opening and two leg openings. Each leg opening can be provided with elastic around the periphery of the leg opening. The elasticity around the leg opening can be provided by a leg opening elastic member (65) arranged along the shaped crotch area of ​​the elastic cover (40), such as Figure 1 and Figure 2A As shown, or provided by a combination of elasticity from the front elastic band (84), the back elastic band (86) and the leg cuff elastics of the absorbent body (38), as Figure 2B shown.

[0098] The front elastic band (84) and the rear elastic band (86) are configured to impart elasticity in the lateral direction. Figure 2A and Figure 4, the front elastic band (84) and the back elastic band (86) may each include a laminate comprising a plurality of elastic members (96F, 96S) extending in the transverse direction, an inner sheet (94), an outer sheet (92) and one or more outer sheet folds (931, 932), wherein the outer sheet fold is an extension of the outer sheet material formed by folding the outer sheet material at the distal edge (88) of the front elastic band and the back elastic band or otherwise; wherein the band elastic members (96F, 96S) are sandwiched between two of these sheets. The front elastic band (84) and the back elastic band (86) may each be composed only of elastic members (96S), inner sheet (94), outer sheet (92) and outer sheet folds (931, 932). At least some of the elastic members (96F, 96S) extend substantially parallel to each other in the transverse direction. All of the elastic members (96F, 96S) may extend substantially parallel to each other in the transverse direction. Such an article can be economically manufactured. At least 10%, or at least about 15% to no more than about 70%, of the front and back elastic bands (84, 86) in the longitudinal direction from the waist opening may be laminated in active elasticity along the entire transverse dimension W1 of the front and back elastic bands (84, 86). For each front and back elastic band (84, 86), the elastic activity of the area overlapping the absorbent body (38) may be removed. Such areas where the elastic activity is removed are referred to herein as "elastic cut windows", and the remaining portion of the intact elastic member that can impart elasticity is defined as the "effective elastic length of the elastic member".

[0099] The tensile stress (N / m) throughout the front and rear elastic bands (84, 86) can be distributed separately to provide functional benefits of the present invention, such as ease of stretching and donning, while also maintaining a specific force during wear to prevent the article from sagging after loading. When the elasticity of the front and rear elastic bands (84, 86) is provided by multiple elastic members (96F, 96S) extending in the transverse direction, the tensile stress can be adjusted by one or more of the following methods: 1) the elongation of the elastic members (96F, 96S); 2) the density (dtex) of the elastic members (96F, 96S); 3) the longitudinal spacing of the multiple elastic members (96F, 96S); and 4) the effective elastic length of the elastic members (96F, 96S) in the transverse direction. The so-called elongation, "0% elongation" refers to the initial length of the elastic member.

[0100] refer to Figure 3AThe back elastic band (86) can be divided into a plurality of zones, each of which spans in the transverse direction and is defined by its position from the distal edge (88) to the proximal edge (90) as a percentage relative to the seam length LS, wherein the distal edge (88) is considered to be 0% and the proximal edge (90) is considered to be 100%. The plurality of zones can be configured to provide different functions to the back elastic band (86), namely, a rear waist zone (102), a protection zone (103) and a hip zone (105) arranged from the distal edge (88) to the proximal edge (90), each of which spans in the transverse direction. In the absorbent article of the utility model, the protection zone (103) includes a main part and a waist protection part (WGP) overlapping each other, the waist protection part (WGP) extending from a closed end line (103B) extending laterally to the crotch region toward the opening edge, wherein the waist protection part (WGP) is partially bonded to the main part to define a pair of closed side lines (103S), wherein a pocket is formed by the closed end line (103B), the closed side line (103S) and the opening edge, and the pocket has an area A2, which is about 5% to about 15% or 10% to about 15% of the area A1 of the rear elastic band; and the closed end line (103B) is positioned proximal to the rear distal edge of the backsheet. The elastic member can be arranged on each of the waist region (102), the protection zone (103), the main part and the hip region (105).

[0101] refer to Figure 3A , the closed side line (103S) may not overlap with the backsheet to ensure the area of ​​the pocket A2. The pocket may have a transverse dimension W3, wherein W3 / W1 is from about 15% to about 60%, or from about 35% to about 50%. When the distance between the side edge (48) of the absorbent body (38) in the protection zone (103) and the nearest transverse edge of the back belt is W4, and the distance between the side edge (48) of the absorbent body (38) in the protection zone (103) and the nearest closed side line is W5, W5 / W4 may be from about 5% to about 30%, or from about 10% to about 20%. The pocket may have a longitudinal dimension LP, wherein LP is from about 15% to about 45%, or from about 20% to about 40% of LS.

[0102] When the distal edge of the side seam is considered to be 0% and the proximal edge of the side seam is considered to be 100%, the protection zone may be set within a position of about 15% to about 80% of the LS. The protection zone, i.e., LP, may not extend from about 15% to about 80% of the entire longitudinal dimension of the LS. When the distal edge of the side seam is considered to be 0% and the proximal edge of the side seam is considered to be 100%, the protection zone may be set within a position of about 20% to about 75%, or about 30% to about 75%, or about 30% to about 65%, or about 35% to about 65% of the LS. Without being bound by theory, by providing a protection zone of such size on the rear elastic band (86), the wearer's gluteal crotch is effectively covered by the waist guard portion WGP, so that low viscosity exudates (such as thin feces) can be effectively sucked into the pocket.

[0103] refer to Figure 2A , FIG. 3A to FIG. 3C and Figure 4 , the waist protection portion WGP is explained by utilizing an embodiment provided on the rear elastic band (86) of the one-piece pants. The waist protection portion WGP is made by an extension of the outer sheet (92) extending beyond the longitudinal dimension of the inner sheet (94), and the extension of the outer sheet (92) is folded inward twice so as to surround the first elastic member (96F) and further provide the waist protection portion WGP in an expected position relative to the side seam length LS. Due to the two folds, the first elastic member (96F) is sandwiched between the first outer sheet folded portion (931) and the second outer sheet folded portion (932), wherein the first outer sheet folded portion (931) constitutes the side of the waist protection portion WGP facing the clothes, and the second outer sheet folded portion (932) constitutes the body-facing surface. Reference FIG. 3A to FIG. 3C , a certain longitudinal dimension from the distal edge of the second outer sheet fold (932) is bonded to the rest of the belt, however, such bonding shown as SWFA leaves some unbonded longitudinal dimensions. The farthest position arranged in the unbonded area is the closed baseline (103B), and the common proximal edge of the first outer sheet fold (931) and the second outer sheet fold (932) is the opening edge (103M). The waist protection portion WGP is defined as having a longitudinal dimension spanning the closed baseline (103B) and the opening edge (103M), and having a transverse dimension that matches the width of the provided belt. The left and right transverse edges of the waist protection portion WGP are also bonded to the rest of the belt, and such bonding is shown as SWFA to define a pair of side closed lines (103S). The unbonded area thus provided is a pocket (103P). Without wishing to be bound by theory, by providing the pocket (103P) with such a configuration, this prevents low viscosity exudates that have entered the pocket (103P) from flowing out towards the waist opening or seeping out of the pocket (103P).

[0104] refer to Figure 3A and Figure 4 , the first elastic member (96F) provides a waist protection elastic portion WGEP, which can be elastic by one or more elastic strands, elastic bands, mechanically activated nonwovens or otherwise. The waist protection elastic portion WGEP (1031) is defined as having a longitudinal dimension LE spanning from the opening edge (103M) of the first elastic member (96F) to the distal edge. When the first elastic member (96F) is a plurality of elastic strands, the distal edge of the waist protection elastic portion WGEP is the position where the elastic strands are positioned to the farthest side. There may be 2-10 elastic strands, or 2-5 elastic strands, or 2-8 elastic strands, or 3-4 elastic strands, or 3-8 elastic strands, or 4-6 elastic strands arranged on the waist protection elastic portion. LE is less than the LE of the waist protection portion WGP, so that a pocket (103P) with a accommodating capacity can be provided. LE may be no greater than about 40 mm, or no greater than about 35 mm, or no greater than about 30 mm, or no greater than about 25 mm, or 15 mm to about 40 mm, or about 10 mm to about 35 mm, or about 10 mm to about 25 mm. FIG. 3A to FIG. 3C In the embodiment of the present invention, the pocket (103P) has a rectangular shape, however, the pocket (103P) can adopt other shapes by changing the bonding area SWFA so that the closed baseline (103B) and the pair of closed test lines are shaped. For example, the closed baseline (103B) can be concave or convex toward the pocket (103B) to match the wearer's anatomy. The longitudinal dimension of the pocket (103P), which is defined as the shortest distance between the closed baseline (103B) and the opening edge (103M), can be about 20 mm to about 45 mm, or about 24 mm to about 42 mm. The waist protection elastic portion (WGEP) can have a longitudinal dimension LE, wherein LE is about 5% to about 21% of LS. When the distal edge of the side seam is considered to be 0% and the proximal edge of the side seam is considered to be 100%, the waist protection elastic portion (WGEP) can be set within a position of about 40% to about 80%, or about 40% to about 75% of LS.

[0105] refer to Figure 3A and Figure 4, the main part of the back elastic band superimposed with the waist protection elastic part WGEP is defined as the relevant part CP. That is, the relevant part CP has the same longitudinal dimension (1031) as the waist protection elastic part WGEP. The relevant part CP may be elasticized or may not be elasticized, wherein the tensile stress of the waist protection elastic part WGEP is higher than the tensile stress of the relevant part CP. The relevant part CP may be elasticized, wherein the tensile stress of the waist protection elastic part WGEP is about 125% to about 180% of the tensile stress of the relevant part CP. Without being bound by theory, such tensile stress difference enables the waist protection elastic part WGEP to be in close contact with the wearer, while pulling the opening edge (103M) from the relevant part CP, thereby opening the pocket (103P) toward the proximal side. Therefore, the pocket (103P) is constructed to have a good accommodating capacity. The relevant part CP may have an elastic cut window so that some parts are elasticized, and the transverse center does not interfere with the opening (103P) of the pocket. When the waist protection elastic part WGEP is elasticized by arranging multiple elastic strands (96F), the elastic strands positioned on the nearest side are arranged to be not less than 2mm to 5mm from the opening edge (103M). It is possible to avoid placing the elastic strands on the extreme edge of the opening edge (103M) to prevent the waist protection position WGP from irritating the wearer. The waist protection elastic part WGEP can be provided with multiple elastic strands (96F), wherein the multiple elastic strands have a relatively small spacing between each other. The elastic strands (96F) of the waist protection elastic part WGEP can be arranged at a spacing of no more than about 12mm, or no more than about 10mm, or no more than about 6mm, or about 2mm to about 8mm, or about 3mm to about 9mm, or about 2mm to about 6mm.

[0106] The elastic strands (96F) used to provide the waist protection elastic portion WGEP can be provided in a color so that the presence and function of the waist protection portion WGP are clearly communicated to the wearer or caregiver. At least two elastic strands used to provide the waist protection elastic portion WGEP can have a color visible from the body-facing side of the article. The color can be selected from green, blue, purple or a combination thereof so that it is easy to identify without being confused with the color of the containment. The same or similar colors can be used for other elastic strands (96S) provided on the belt to provide a coordinated appearance. For example, those elastic strands on the front waist region (102) or the back waist region (102) can have the same or similar colors.

[0107] refer to Figure 4, the longitudinal edge (50) of the absorbent body (38) can be positioned and bonded between the waist protection portion WGP and the rest of the belt. This is to avoid having a sharp edge of the absorbent body (38) on the surface facing the body, and also to avoid leakage from the edge. The absorbent body (38) includes an absorbent material area (62), which can be surrounded by an absorbent material lacking area (61), wherein the thickness of the absorbent material area (62) is greater than the thickness of the absorbent material lacking area (61). The absorbent material area (62) can partially overlap the area of ​​the pocket (103P) to provide at least some absorption capacity in this area. At least about 3% or at least about 10% of the area of ​​the pocket (103P) can overlap the absorbent material area (62) toward the proximal edge. Even so, the total thickness of the waist protection elastic portion WGEP, the associated portion CP and the portion of the absorbent body (38) sandwiched between the waist protection elastic portion WGEP and the associated portion CP can be maintained at no more than about 5 mm, preferably no more than about 4 mm. This is because, due to the elasticity of the waist protection elastic portion WGEP, the thickness of the rest of the article does not interfere with the opening of the pocket (103P) toward the proximal side. When the absorbent body (38) includes a collection system, it is possible to avoid overlapping the pocket (103P) with the collection system. In order to provide the waist protection portion WGP relative to the absorbent body (38) in the aforementioned manner, the distance between the waist opening and the longitudinal edge of the absorbent body (38) can be adjusted, that is, it can be offset toward the rear side or the front side. For example, when the waist protection portion WGP is provided on the back elastic band (86), the distance between the waist opening and the longitudinal edge of the absorbent body (38) can be shorter on the rear side than on the front side.

[0108] refer to Figure 3A , the absorbent body (38) may further include a pair of inner cuffs (66) disposed along the side edges (48) to provide a barrier along both side edges (48) of the absorbent body (38). The inner cuffs (66) may be made of a material having a high fluid impermeability and elasticized by a plurality of inner cuff elastics (67). The waist protection portion WGP may be constructed in a specific manner relative to the inner cuffs (66) to provide improved functionality. The inner cuffs (66) may be in active elasticity at the proximal edge of the waist protection portion (103M). By providing active elastic leg cuffs in such locations, the combined elasticity from the leg cuffs and the waist protection elastic portion WGEP may help keep the inner cuffs (66) and the waist protection portion WGP in close contact with the wearer and further provide additional containment capacity of the pocket (103P).

[0109] refer to Figure 3A, the back elastic band (86) can be divided into 3 zones, which span in the transverse direction and are defined by their positions from the distal edge (88) to the proximal edge (90) relative to the percentage of the seam length LS; 0% to the distal edge of the waist protection portion WGP is the back waist region (102), the distal edge to the proximal edge of the waist protection portion WGP is the protection zone (103), and the proximal edge to 100% of the waist protection portion WGP is the hip region (105). The elastic member can be provided on each of the waist region (102), the protection zone (103) and the hip region (105).

[0110] refer to Figure 4 The elastic covering (40) of the utility model can be made of a relatively simple structure, which includes no more than: an inner sheet (94), an outer sheet (92), a first outer sheet folded portion (931), a second outer sheet folded portion (932), and a first elastic member and a second elastic member (96F, 96S) contained in these layers. Any part of the elastic covering (40) including the waist protection part WGP can be made of less than 6 layers, or made of 3 to 4 layers, and the total thickness does not exceed about 5mm or does not exceed about 4mm. Providing a simple and relatively thin structure is advantageous in maintaining the breathability and softness of the belt. In addition, the elastic covering (40) can be made of elastic strands commonly used in the art, and the density of the elastic strands does not exceed 940 decitex. Certain areas of the elastic covering (40) can be set by an elastomer with a density of no more than about 500 decitex, thereby providing a soft fit. The article of the utility model can provide a protective measure for preventing low viscosity body exudates from leaking from the waist opening while maintaining good stretchability for easy wearing, good fit for preventing sagging, good comfort and softness, and good breathability. The article of the utility model can have a waist force measured according to the full product force value herein, which does not exceed about 9N or does not exceed about 8N.

[0111] refer to Figure 3C and Figure 4 , the back elastic band (86) may include an unattached area (AFA) between the second outer sheet fold (932) and the main portion, which area is free of any attachment, for example, no second waist fold adhesive (SWFA). The unattached area (AFA) has a longitudinal dimension of at least 8 mm and extends across the entire transverse dimension. By providing such an unattached area (AFA), this can provide a loose and soft touch to the body-facing surface.

[0112] refer to Figure 1 , Figure 2A and Figure 4Even when the back elastic belt (86) includes the waist guard portion WGP, the rest of the back elastic belt (86), in particular the garment-facing surface of the back elastic belt (86), can be maintained in a simple structure. This allows the article to have other functions required of a pant-type absorbent article, such as having a disposal tape attached to the garment-facing surface of the back elastic belt (86). Therefore, the absorbent article may be free of fastening means.

[0113] Vapor Permeability Demonstration

[0114] The absorbent article (20) of the present invention can intuitively demonstrate the thinness and / or controlled number of layers used to provide the waist protection part WGP through demonstration. That is, the waist protection elastic part WGEP can have a total thickness of the waist protection elastic part, the related part and the absorbent main body part of not more than about 5 mm, or not more than about 4 mm, and can be made of less than 6 layers, or made of 3 to 4 layers. Therefore, the utility model also relates to a method for demonstrating the vapor permeability of an absorbent article in an ambient environment, wherein the method comprises the following steps:

[0115] 1) providing a steam supply source that supplies steam at a temperature of about 35°C to about 95°C, preferably about 45°C to about 85°C, in a direction opposite to gravity;

[0116] 2) placing the wearer-facing side of at least a portion of the waist protection elastic portion WGEP in a position capable of receiving steam from a steam supply source;

[0117] 3) placing a shape memory object (402) having a deformation temperature of at least 30°C on the garment-facing side of a location receiving steam, wherein the time of placing the shape memory object (402) is considered as the start time; and

[0118] 4) allowing the shape memory object (402) to deform, wherein the deformation begins within about 10 seconds, preferably within about 5 seconds, from the start time, and the deformation is completed within about 2 to about 30 seconds, preferably about 3 to about 10 seconds, from the start of the deformation.

[0119] The so-called ambient environment refers to an environment with a temperature of about 8°C to about 25°C, a relative humidity of about 20% to about 80%, preferably about 30% to 70%, an airflow of less than about 1.5 m / s, and a roof or in a closed room.

[0120] The steam supply source can be any object capable of supplying water vapor and / or a hot air flow of at least 40°C, including but not limited to a container holding hot water, a humidifier, a hair dryer, a steam iron, or any other object or appliance commonly found in a home or basic research facility.

[0121] The shape memory object (402) may include any shape memory material that is capable of changing shape at a deformation temperature of at least 30°C, such as a nickel-titanium based shape memory metal alloy (references: Hodgson, DE; Wu, MH; Biermann, RJ (1990). "Shape Memory Alloys". Properties and Selection: Nonferrous Alloys and Special-Purpose Materials. Pages 897 to 902). Materials with a one-way or two-way shape memory effect may be used, preferably a two-way shape memory effect. The shape memory object (402) may be designed by assembling shape memory material components into a specific geometric shape, or using shape memory materials as joints or skeleton-like units to connect with other components made of non-shape memory materials. The shape memory material components may be in the form of sheets, strips, wires or coils, and may be made in a variety of sizes, thicknesses, colors and shapes, and may be combined with non-shape memory components. The deformation of the shape memory object (402) herein refers to a change in shape that is easily recognizable to the naked eye. Preferably, the deformation of the shape-memory object (402) is highly identifiable by a typical consumer from a distance of several meters away.

[0122] Reference Fig. 6A , showing an embodiment of a shape memory object (402) in an ambient environment. Specifically, a piece of nickel-titanium shape memory alloy material is cut to have a petal-like profile, and a plurality of petals are assembled into a flower-like geometric shape and fastened with the aid of a threaded fastener. The flower-like shape memory object (402) embodiment may have golden petals, and the dimensions of the height and width are about 2 cm to about 4 cm. The temperature-dependent shape change involves such Fig. 6A The first geometric shape of the flower bud with curled and closed petals at low temperatures as shown, and Figure 6B A second geometric shape of a blooming flower is shown with petals opening when a temperature of about 30°C or higher is reached. Figure 6B The resulting shape-memory object (402) of the second geometric shape may have a width of about 4 cm to about 8 cm, so that deformation can be easily recognized.

[0123] Although not shown, the shape memory object (402) may include a shape memory material formed into a joint or skeleton-like unit with non-shape memory components attached to such unit, such as to resemble an animal or vehicle, etc. The first and second geometric shapes may be adjusted to show that the shape memory object (402) has changed posture or has acquired mobility.

[0124] In one embodiment, the steam supply source is a beaker filled with hot water, with the mouth facing upward. The wearer-facing side of the article (20) including at least a portion of the waist protection elastic portion WGEP is placed on the mouth of the beaker facing the water surface. The article (20) can be firmly attached to the outer wall of the beaker with a rubber band or the like to effectively receive water vapor. The shape memory object (402) is placed on the clothing-facing side of the article so positioned and allowed to deform. The shape memory object (402) can be placed in the desired position with tweezers to avoid the operator's body temperature from being transferred to the shape memory object (402) too early. The placement position can avoid the optional disposal tape provided on the back belt of the trouser-type article (20) because such disposal tape will hinder vapor permeability.

[0125] In an alternative illustrative embodiment, the front and rear longitudinal ends of the article can be clamped so that the wearer-facing side of the article (20) (including at least a portion of the waist protection elastic portion WGEP) faces downward, a hair dryer blows air from below the article toward the wearer-facing side of the article (20), and a shape memory object (402) is placed on the garment-facing side of the portion that receives the hot air vapor to allow it to deform. The start of the hair dryer blowing and the placement of the shape memory object (402) can be coordinated to occur simultaneously.

[0126] The temperature and type of the steam supply source, the temperature and shape of the shape memory object (402), and the distance between the steam supply source and the article can be adjusted so as to provide deformation of the shape memory object (402) in a sufficiently fast duration that is easily recognized by an observer. In addition, the article (20) and the steam supply source are positioned so that the material of the article (20) is not deformed by the heat from the steam supply source. In order to provide good recognition to the observer, when the time when the shape memory object (402) is placed is considered to be the start time; the deformation starts within about 10 seconds, preferably within about 5 seconds from the start time, and the deformation is completed within about 2 to about 30 seconds, preferably about 3 to about 10 seconds from the start of the deformation.

[0127] Linear dimension measurement and area calculation

[0128] To obtain a sample for this measurement, the side seams (32) of the article are opened and the garment-facing side of the entire article is attached to the surface of an opaque backing plate by hook material or double-sided tape material. The backing plate should be large enough to support the entire area of ​​the article. When attached, any elastic member is stretched to its "maximum stretched state" where the following conditions a) to c) are met unless any material failure is observed.

[0129] a) Side seams are straight.

[0130] b) There are no wrinkles on the central chassis or elastic areas.

[0131] c) Viewed from the longitudinal axis, the left and right parts of the article are symmetrical.

[0132] For most articles, the front elastic belt area and the back elastic belt area can be stretched to "30N circumference" as measured under "Full Article Force Measurement" below to meet the above conditions. If any material failure is observed before reaching the stretch level that meets the above conditions, the maximum stretch point at which the material has not failed is considered the "maximum stretch state". Material failure may include decomposition of nonwoven materials, breakage of elastic strands, etc.

[0133] The following dimensions of the sample were measured, some of which may vary depending on the contour of the article. Figure 2A , Figure 2B and Figure 3A The following are representative product outlines used to explain how dimensions are measured and are not intended to be an exhaustive list of product outlines for the present invention. Report linear dimensions to the nearest 1 mm. Report area calculations to the nearest 1 mm. 2 . Five samples were measured and their average value was obtained.

[0134] W1: Transverse dimension of the rear elastic band

[0135] W2: Maximum transverse dimension of the absorbent body

[0136] W3: Horizontal size of the pocket

[0137] W4: Distance between the side edge of the absorbent body and the nearest transverse edge of the rear belt in the protection zone

[0138] W5: Distance between the side edge of the absorbent body in the protection area and the nearest closure side line

[0139] W6: Minimum lateral dimension of the elastic covering

[0140] LS: longitudinal dimension of the side seam

[0141] LP: vertical dimension of pocket

[0142] LE: longitudinal dimension of the waist protection elastic part

[0143] A1: W1×LS

[0144] A2:W3×LP

[0145] Total thickness

[0146] The total thickness is measured at 0.1 psi using a caliper measuring device such as PEACOCK 307 from Ono Sokki Inc. The sample for this measurement is prepared in the same manner as in the measurement of the above-mentioned "Linear Dimension Measurement and Area Calculation".

[0147] Determine the approximate center of the waist protection elastic portion in the longitudinal direction and the transverse direction. Measure the thickness of the product at this approximate center, including at least the waist protection elastic portion, the related portion and the portion of the absorbent body sandwiched between the waist protection elastic portion and the related portion. Report the dimensions to the nearest 0.01 mm. Measure five samples and obtain their average value.

[0148] Full product force measurement

[0149] Force is measured using an electronic tensile tester or equivalent instrument with a computer interface such as MTS Criterion C42 running TestWorks 4 software (purchased from MTS SYSTEMS (CHINA) CO., LTD). The load cell is selected so that the force result of the tested sample will be between 10% and 90% of the capacity of the load cell used. The instrument is calibrated according to the manufacturer's instructions. All tests are carried out in a room maintained at 23°C ± 2°C and 50% ± 5% relative humidity.

[0150] The tensile tester is equipped with a hanger-type sample fixing fixture (300), such as Figure 5 As shown. Each fixture includes a rigid linear rubber-coated horizontal rod segment (302) to prevent the sample from slipping during testing. The outer rod diameter of the horizontal rod segment (including the rubber coating) is 10.0 mm. The central axis of the horizontal rod segment (302) is configured to remain parallel and in the same vertical plane throughout the test. The gauge circumference is determined by the following formula:

[0151] Gauge circumference = 2×(H+D+πD / 2)

[0152] Where H is the vertical gap between the horizontal rod segments (302) and D is the outer diameter of the rod.

[0153] The instrument is set up to go through the following steps:

[0154] Chuck speed 254.0mm / min Final load point 19.61N Keep Time 0 Number of cycles 1 Data acquisition rate 50Hz

[0155] Insert the product (20) sample onto the upper horizontal rod segment (302) so that the rod passes through the waist opening and one leg opening of the product. Raise the chuck until the sample is suspended above the lower rod and does not touch the lower rod (302). The load cell is calibrated and the chuck is lowered so that the lower rod (302) is inserted through the waist opening and the other leg opening, but without stretching the product. Adjust the product so that the longitudinal centerline L1 of the product is in a horizontal plane between the upper rod and the lower rod (302). The center of the side in contact with the rod (302) is located on the same vertical axis as the instrument load cell. The chuck is slowly raised while holding the product in place by hand as needed until the force is between 0.05N and 0.1N, while being careful not to add any unnecessary force. The gauge circumference at this time is the initial gauge circumference. Start the test, and the chuck moves upward at 254mm / min until a force of 19.6N is obtained, and then the chuck is immediately restored to the initial gauge circumference at the same speed. The maximum circumference at 19.6 N and the force at 70% of the maximum circumference were recorded during the loading and unloading segments of the test.

[0156] The maximum circumference at 19.6N is defined as the fully stretched circumference (mm). The fully stretched circumference (mm) x 0.7 is defined as the 70% stretched circumference. The girth force is defined as the force at 70% stretched circumference during the load (stretch) phase of the test. Five samples are analyzed and their average values ​​are calculated and reported separately to the nearest 0.01N.

[0157] Band tensile stress measurement

[0158] Tensile stress (N / m) is calculated by dividing the tension (N) by the sample width (m). Force can be measured using an electronic tension tester or equivalent instrument running TestWorks 4 software (purchased from MTS SYSTEMS (CHINA) CO., LTD) with a computer interface such as MTS Criterion C42. The load sensor is selected so that the force result of the tested sample will be between 10% and 90% of the capacity of the load sensor. The instrument is calibrated according to the manufacturer's instructions. All tests are carried out in a room maintained at 23°C ± 2°C and 50% ± 5% relative humidity. The instrument is equipped with a single-wire contact clamp that is at least as wide as the specimen.

[0159] To obtain the test specimens, the sample article is cut along the side seams (32) and the elastic cover (40) or the front and back belt areas (26, 28) are removed from the absorbent body (38) by breaking the bond between them and the waist protection part WGP is further separated from the belt to which it is attached. Cold spraying can be used, taking care not to wrinkle the belt part. Be careful not to spray on any belt elastic member (96F, 96S). According to the utility model, the obtained elastic belt sample is cut into zones (102, 103, 1031-WGEP, 1031-CP, 105), taking care not to cut any elastic member (96F, 96S). Before testing, the sample is pre-conditioned for two hours at 23°C ± 2°C and 50% ± 5% relative humidity.

[0160] The instrument is set up to go through the following steps. Calculate the initial gauge length from the initial gauge circumference measured during the full product force test using a separate identical article as described above. Initial gauge length = 0.5 x initial gauge circumference. Calculate the final gauge length from the fully stretched circumference measured during the full product force test as described above.

[0161] Chuck speed 254.0mm / min Data acquisition rate 50Hz Final gauge length 0.5× fully stretched circumference Keep Time 0 Number of cycles 1

[0162] Clamp one end of the sample into the upper fixture and tame the load. Clamp the other end of the sample into the lower fixture. Approximately 5 mm of each end of the sample is behind the contact line of the clamps. Start the test and stretch the sample to the final gauge length at a clamp speed of 254 mm / min and then immediately return to the initial gauge length at the same speed. During the test, the sample is stretched in the cross direction of the article. Record the unloading force at 70% of the final gauge length during the unloading section of the test.

[0163] For each zone, five articles were analyzed and the unloading force was recorded. The average tensile force (N) was calculated to the nearest 0.01 N for each zone. The tensile stress for each zone was calculated and reported by dividing the average tension (N) by the average sample width (m), accurate to 0.1 N / m.

[0164] Example

[0165] Example 1

[0166] The one-piece pant absorbent product of size 4 (L) of the present invention has an elastic distribution of the back elastic belt according to the following Table 1. The protection zone including the waist protection portion WGP is located at 39% to 65% of LS on the back elastic belt. The waist protection elastic portion WGEP is located at 52% to 65% of LS on the back elastic belt and has 3 elastic strands. The 2 elastic strands on the relevant portion CP have elastic cutting windows.

[0167] Comparative Example 1

[0168] The core of a one-piece pant absorbent product of size 4 (L) manufactured for the Chinese market and sold under the trade name "Pampers Luxurious Skin" was replaced with a core of batch number FJTB2K257B01 produced by Fujian Tengbang New Materials Co., Ltd. The only difference between the replaced core and "Pampers Luxurious Skin" is the pore size of the nonwoven material. The replaced core has the same component dimensions and the same superabsorbent polymer absorption capacity as "Pampers Luxurious Skin". The front elastic belt and the absorbent body have very similar dimensions, structure and elastic distribution as in Example 1. The rear elastic belt has the same dimensions as in Example 1, without the waist protection part WGP, and has the elastic distribution of the rear elastic belt according to the following Table 1 in the corresponding position.

[0169] Table 1

[0170]

[0171] For Example 1 and Comparative Example 1, the waist force measured according to the whole product force value herein and the tensile stress of the waist protection elastic part WGEP and the related part CP measured according to the belt zone tensile stress herein were measured. The results are provided in Table 2 below.

[0172] Table 2

[0173] Example 1 Comparative Example 1 Waist force (N) 3.66 3.03 Tensile stress of waist protection elastic part (N / m) 15.0 N / A Tensile stress of relevant parts (N / m) 10.0 N / A Total thickness(mm) 2.69 N / A

[0174] Consumer acceptance

[0175] 80 panelists were recruited, all of whom were caregivers of infants of 0 to 36 months of age, using size 4 (M), weighing 9kg to 14kg, and having a mixed experience of major brands of similar price ranges. During recruitment, each panelist was asked to confirm whether their infant had experienced leakage of low-viscosity feces. Each panelist was asked to use each test sample in a different order, for 5 days each, and to provide enough samples to test each test sample. Panelists were asked to report the number of samples containing urine / feces and the number of events of urine / feces leakage from the lower back. Panelists were also asked to use 5 grades (overall grades) for those values ​​to score the test sample, and the scoring criteria were as follows: "poor" = 0, "general" = 25, "good" = 50, "very good" = 75, and "excellent" = 100. The panelists were also asked to rate the test samples against those values ​​using a 5-point scale (relative category scale) with the following rating scale: "Best diaper I've ever used" = 100, "Better than diapers I've used" = 75, "No different than diapers I've used" = 50, "Worse than diapers I've used" = 25, "Worst diaper I've ever used" = 0. The rating results and leakage percentages are provided in Table 3.

[0176] Table 3

[0177] value Example 1 Comparative Example 1 Overall Rating 69 71 Relative Category Level 60 64 Urine leakage% 0.9％ 0.7％ Fecal leakage% 4.0％ 1.8％*)

[0178] *) Statistically significant at the 90% confidence level

[0179] Example 1 and Comparative Example 1 provide good fit, comfort during wear, urine leakage resistance, and softness. Example 1 provides good protection against feces leakage from the rear waist opening at a statistically significant level compared to Comparative Example 1. Example 1 can be manufactured at substantially the same speed as Comparative Example 1, and the additional cost of material cost does not exceed about 5%.

[0180] The dimensions and values ​​disclosed herein are not to be understood as being strictly limited to the exact numerical values ​​cited. Instead, unless otherwise indicated, each such dimension is intended to represent the stated value and a functionally equivalent range around that value. For example, a dimension disclosed as "40 mm" is intended to mean "about 40 mm".

[0181] Unless expressly excluded or otherwise limited, each document cited herein, including any cross-referenced or related patent or application, is incorporated herein by reference in its entirety. The reference to any document is not an admission that it is prior art to any disclosed or claimed invention of the present invention, or an admission that it proposes, suggests or discloses any such invention by itself or in combination with any one or more references. In addition, when any meaning or definition of a term in the present invention conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to the term in the present invention shall prevail.

[0182] Although the specific embodiments of the utility model have been illustrated and described, it is obvious to those skilled in the art that various other changes and modifications can be made without departing from the essence and scope of the utility model. Therefore, it is intended that all such changes and modifications within the scope of the utility model are covered in the appended claims.

Claims

1. An absorbent product, characterized in that The absorbent article has a longitudinal direction, a transverse direction, a pair of side seams and a pair of leg openings, the absorbent article comprising: a front elastic band extending laterally between the pair of side seams; a back elastic belt extending transversely between the pair of side seams; the front elastic belt and the back elastic belt each comprising a laminate including a plurality of elastic members extending in the transverse direction; a crotch region extending longitudinally between the front elastic belt and the back elastic belt; and an absorbent body extending over the entire longitudinal dimension of the crotch region and further extending partially into each of the front elastic belt and the back elastic belt, the absorbent body comprising a liquid-permeable top sheet, a liquid-impermeable back sheet and an absorbent material area sandwiched between the liquid-permeable top sheet and the liquid-impermeable back sheet, the absorbent body having a maximum transverse dimension W2, the maximum transverse dimension W2 being 22% to 50% of the transverse dimension W1 of the back elastic belt; the rear elastic band being divided into a rear waist region, a protection region and a hip region arranged from a distal edge to a proximal edge, each region spanning in the transverse direction and defined by its position from the distal edge to the proximal edge as a percentage of the longitudinal dimension LS of the side seam, wherein the elastic member is provided on each of the rear waist region, the protection region and the hip region, The protection zone includes a main portion and a waist protection portion overlapping each other, the waist protection portion extending from a laterally extending closed end line toward the crotch region toward the opening edge, wherein the waist protection portion is partially bonded to the main portion to define a pair of closed side lines, wherein a pocket is formed by the closed end line, the pair of closed side lines and the opening edge, the pocket having an area A2, the area A2 being 5% to 15% of the rear elastic band having an area A1; and the closed end line is positioned proximal to the rear distal edge of the chassis; wherein the waist protection portion includes a waist protection elastic portion, wherein the main portion overlapping the waist protection elastic portion is defined as a related portion, The pocket has a transverse dimension W3, wherein W3 / W1 is 15% to 60%.

2. The absorbent article according to claim 1, characterized in that A2 / A1 is 10% to 15%, and W3 / W1 is 35% to 50%.

3. The absorbent article according to claim 1, characterized in that The absorbent article comprises: the distance W4 between the side edge of the absorbent body and the nearest transverse edge of the back elastic belt in the protection zone, and the distance W5 between the side edge of the absorbent body in the protective area and the nearest closed side line, Among them, W5 / W4 is 5% to 30%.

4. The absorbent article according to any one of claims 1 to 3, characterized in that W5 / W4 is 10% to 20%.

5. The absorbent article according to any one of claims 1 to 3, characterized in that When the distal edge of the side seam is considered to be 0% and the proximal edge of the side seam is considered to be 100%, the protection zone is disposed within a position of 15% to 80% of LS.

6. The absorbent article according to claim 5, characterized in that The protection zone is set within the position of 20% to 40% of LS.

7. The absorbent article according to any one of claims 1 to 3, characterized in that The pocket has a longitudinal dimension LP, wherein LP is 15% to 45% of LS.

8. The absorbent article according to claim 7, characterized in that LP / LS is 20% to 40%.

9. The absorbent article according to any one of claims 1 to 3, characterized in that When the distal edge of the side seam is considered to be 0% and the proximal edge of the side seam is considered to be 100%, the waist protection elastic portion is arranged within the 40% to 80% position of LS.

10. The absorbent article according to claim 9, characterized in that The waist protection elastic portion is disposed within a position of 40% to 75% of the LS.

11. The absorbent article according to any one of claims 1 to 3, characterized in that The waist protection elastic portion has a longitudinal dimension LE, wherein LE is 5% to 21% of LS.

12. The absorbent article according to any one of claims 1 to 3, characterized in that The absorbent article comprises an elastic cover extending over the entire longitudinal dimension of the article and comprising the front elastic band and the back elastic band, the absorbent body having a maximum transverse dimension W2, wherein the elastic cover has a minimum transverse dimension W6, and the minimum transverse dimension W6 is 110% to 150% of W2.

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