Disposable pant-type absorbent article

Abstract

The utility model discloses a disposable pants type absorption product, which is provided with a front area, a rear area and a crotch area, and comprises a front piece positioned in the front area, a rear piece positioned in the rear area and an absorption component positioned between the front piece and the rear piece, wherein the front piece of the front area comprises an innermost layer of non-woven fabric; a first inner layer non-woven fabric; an outer layer non-woven fabric; a first elastic region designed to extend from the front outer edge to the transverse fold line T by a length of 5 mm or more; a second elastic region designed to extend from the first elastic region to a transverse fold line T by a length of 50 mm or more; and the drawing force of the first elastic area in the front area is higher than that of the second elastic area. Thus, it is ensured that the absorbent product has excellent fitness, especially advantageously, a distinctive fine and smooth pleated appearance and a soft hand feeling can be achieved, and the competitiveness of the product can be improved.

Description

Technical Field

[0001] The utility model relates to a disposable absorbent product, in particular to a disposable pants-type absorbent product which is constructed with an improved invisible waist design. Background Art

[0002] Pants-type absorbent products are disposable sanitary products commonly used by infants and young children. They can also be called "growing pants", "pull-up pants" or "pull-on diapers". Because they not only have the function of absorbing urine and preventing leakage, but also have the advantages of being easy to wear and convenient for activities, they can make it easy for babies to learn to walk and help caregivers such as mothers to reduce fatigue. This kind of absorbent product can make babies wear it like wearing small underwear that fits comfortably and allows babies to move more naturally, which is the best choice for the toddler stage.

[0003] In order to achieve a good fit, many disposable pant-type absorbent articles use elastic elements that are fixed in an elastically contractible state in the waist opening and / or leg openings. Usually, in order to ensure a complete elastic fit around the legs and waist, such as providing a durable underwear, the leg openings and waist openings are at least partially surrounded by elasticized bands of rubber or other materials, which are positioned along the periphery of the corresponding openings. As for the existing products on the market, elastic materials such as stretch yarn, elastic film, elastic cloth and composite elastomer can usually be selected as elastic elements in the elastic waist design of pant-type absorbent articles.

[0004] The design of elastic waistbands for pant-type absorbent products is full of challenges. Ideally, the elastic waistband of pant-type absorbent products is expected to deliver as little pressure as possible to the skin of infants or wearers to provide improved skin conditions and skin marks, but at the same time it needs to provide sufficient force to provide a lasting fit. Specifically, whether in consumer complaints / negative reviews on e-commerce platforms or in actual consumer wear tests, the marks and red marks formed by pant-type absorbent products during actual use by babies are considered as the main factors for negative reviews, which is a long-term pain point in the research and development of elastic waistbands for pant-type absorbent products. At the same time, if the pressure exerted on the wearer's skin by the overall waistband is reduced by simply reducing the stretching ratio of the elastic elements in the elastic waistband, the elastic waistband designed in this way will in turn have insufficient fit and there will be a problem of the diaper easily falling down after the baby urinates due to the crotch absorbing a large amount of urine or during the baby's exercise.

[0005] Furthermore, it is also undesirable for the elastic waistband of a pant-type absorbent article to have a wrinkled appearance; the wrinkled appearance may give people an impression of being stuffy and uncomfortable. In a conventionally designed elastic waistband, when in a relaxed state, the height difference between the crest and the trough of the nonwoven fabric wrinkles produced is large, the distance between the crests of the wrinkles is far, and the appearance of the wrinkles - the crests / troughs are relatively large and messy, and the wrinkles are not delicate enough, resulting in a less refined appearance of the waist area. Moreover, the homogenization phenomenon of such products on the market is very serious, tending to be the same, and lacking differentiated product design. Furthermore, with known twisted or laminated elastic waistbands, the outer layer of the nonwoven fabric cannot visually conceal or block the sandwiched elastic elements. As a result, consumers can clearly see the coarse denier stretch yarn, which creates an intuitive feeling of being tightened.

[0006] Therefore, there is a need in the art to further optimize the design of the elastic waist of pants-type absorbent articles, and it is expected that the elastic waist of the optimized pants-type absorbent articles can meet at least one of the following properties: acceptable pressure on the skin, sufficient force for durable fit, high extensibility and smooth and uniform texture. Such absorbent articles will provide improved skin conditions, skin imprints, improved durable fit, improved padding, and improved fit and wearer comfort. Utility Model Content

[0007] Therefore, the task of the present invention is to provide a disposable pant-type absorbent product, thereby at least partially overcoming the above-mentioned disadvantages of the prior art.

[0008] In order to accomplish the above-mentioned task, the utility model provides a disposable pant-type absorbent product, wherein the absorbent product has a front region, a back region and a crotch region arranged between the front region and the back region, wherein the absorbent product is defined by a longitudinal center line and a transverse folding line for converting the disposable pant-type absorbent product into a wearing configuration, and comprises: a front piece located in the front region and a back piece located in the back region, and an absorbent assembly located in the crotch region and extending into the front piece and the back piece; wherein the front piece and the back piece each have a front outer edge and a rear outer edge, a first side edge and a second side edge respectively located on both sides of the longitudinal center line, and the absorbent assembly is disposed in the crotch region and extends into the front piece and the back piece; wherein the front piece and the back piece each have a front outer edge and a rear outer edge, and a first side edge and a second side edge respectively located on both sides of the longitudinal center line, and the absorbent assembly is disposed in the crotch region and extends into the front piece and the back piece. Each of the front piece and the back piece also has a front outer cover layer and a back outer cover layer facing the surface of the garment, wherein the front piece in the front region can be bonded to the back piece in the back region to form a pair of side seams, thereby defining a waist opening and a pair of leg openings; wherein the absorbent assembly has a top sheet layer facing the body and a bottom sheet layer facing the garment, and an absorbent core positioned between the top sheet layer and the bottom sheet layer; and an innermost nonwoven fabric below the bottom sheet layer, wherein the innermost nonwoven fabric has a length extending into the front piece and the back piece respectively along the longitudinal center line; wherein the front piece in the front region comprises: The first inner nonwoven fabric extending from the bottom of the innermost nonwoven fabric is designed to extend to the front outer edge of the front area and then be folded back for a certain length; the outer nonwoven fabric extending from the first inner nonwoven fabric in the front area is designed to extend from the transverse folding line to the front outer edge of the front area and then be folded back for a certain length; the first elastic area is designed to extend from the front outer edge toward the transverse folding line T for a length of more than 5 mm, wherein in the first elastic area, 1 to 20 strands of yarn with a fineness of 200 to 100 are sandwiched between the folded part of the first inner nonwoven fabric and the folded part of the outer nonwoven fabric and the folded part of the first inner nonwoven fabric. The invention relates to a first elastic strand with a denier of 0 and a stretch ratio of 150% or more, wherein the spacing between these first elastic strands is more than 2 mm; a second elastic zone, which is designed to extend from the inner edge of the first elastic zone toward the transverse folding line T for a length of more than 25 mm, wherein in the second elastic zone, 20 to 800 second elastic strands with a strand fineness of 40 to 300 denier and a stretch ratio of more than 150% are sandwiched between the first inner non-woven fabric and the outer non-woven fabric, wherein the spacing between these second elastic strands is more than 0.5 mm; wherein, in the front zone, the tensile force of the first elastic zone is higher than the tensile force of the second elastic zone.

[0009] Therefore, in the present invention, elastic strands with different properties are innovatively and reasonably combined to fundamentally reduce the red marks and strangulation marks on the waist after wearing by infants and young children. With the innovative combination and stretching ratio range of different elastic strands proposed by the present invention, combined with the combination design of non-woven fabrics, the invisible effect of the sandwiched elastic strands is achieved, and consumers can generally not see the sandwiched elastic strands from the appearance without paying strict attention, while ensuring that the absorbent product has excellent fit, and especially advantageously, it can also achieve a unique delicate wrinkled appearance and soft feel. The above product performances are very beneficial to improving the competitiveness of the product.

[0010] As a preferred aspect, the back sheet of the back zone comprises: a second inner layer of nonwoven fabric extending below the innermost layer of nonwoven fabric in the back zone, which is designed to extend from below the innermost layer of nonwoven fabric to the rear outer edge of the back zone and then be folded back for a certain length; an outer layer of nonwoven fabric extending below the second inner layer of nonwoven fabric in the back zone, which is designed to extend from a transverse folding line to the rear outer edge of the back zone and then be folded back for a certain length; a third elastic zone, which is designed to extend from the rear outer edge toward the transverse folding line T for a length of more than 5 mm, wherein a third elastic zone is sandwiched between the folded portion of the second inner layer of nonwoven fabric and the folded portion of the outer layer of nonwoven fabric and the undone portion of the second inner layer of nonwoven fabric in the third elastic zone. There are 1 to 20 third elastic strands with a strand fineness of 200 to 1000 deniers and a stretching ratio of more than 150%, wherein the spacing between these third elastic strands is more than 2 mm; a fourth elastic zone is designed to extend from the third elastic zone to a transverse folding line T for a length of more than 25 mm, wherein in the fourth elastic zone, 20 to 800 fourth elastic strands with a strand fineness of 40 to 300 deniers and a stretching ratio of more than 150% are sandwiched between the second inner non-woven fabric and the outer non-woven fabric, wherein the spacing between these fourth elastic strands is more than 0.5 mm; wherein, in the rear zone, the tensile force of the third elastic zone is higher than the tensile force of the fourth elastic zone.

[0011] As a preferred aspect, it also includes a fifth elastic strand located in the first elastic zone, wherein 1 to 50 fifth elastic strands are sandwiched between the folded portion of the first inner non-woven fabric and the folded portion of the outer non-woven fabric, wherein the strand fineness of the fifth elastic strand is 40 to 300 denier and the stretching ratio is greater than 150%, wherein the spacing between these fifth elastic strands is greater than 0.5 mm.

[0012] As a preferred aspect, it also includes a sixth elastic strand located in the third elastic zone, wherein 1 to 50 sixth elastic strands are sandwiched between the folded portion of the second inner non-woven fabric and the folded portion of the outer non-woven fabric, wherein the strand fineness of the sixth elastic strand is 40 to 300 denier and the stretching ratio is greater than 150%, wherein the spacing between these sixth elastic strands is greater than 0.5 mm.

[0013] As a preferred aspect, the first inner layer nonwoven fabric and the second inner layer nonwoven fabric can be selected from hot air nonwoven fabric, spunbond nonwoven fabric, spunbond meltblown nonwoven fabric or at least one of hot air / spunbond / spunbond meltblown nonwoven fabric with pattern printing, wherein the material fiber fineness of the first inner layer nonwoven fabric and the second inner layer nonwoven fabric is 0.6 denier to 3.0 denier and the gram weight range of the nonwoven fabric is 8 g / m2 to 32 g / m2.

[0014] As a preferred aspect, the outer layer nonwoven fabric can be selected from hot air nonwoven fabric, spunbond nonwoven fabric, spunbond meltblown nonwoven fabric or at least one of hot air / spunbond / spunbond meltblown nonwoven fabrics with pattern printing, wherein the diameter of the material fiber of the outer layer nonwoven fabric is 5 to 30 microns and its gram weight ranges from 10 grams / square meter to 35 grams / square meter.

[0015] As a preferred aspect, the stretching ratio of the first elastic strands is 150% to 300%, and the spacing between these first elastic strands is 2 to 15 mm, or the stretching ratio of the second elastic strands is 150% to 350%, and the spacing between these second elastic strands is 0.5 to 2.5 mm.

[0016] As a preferred aspect, the stretching ratio of the third elastic strands is 150% to 300%, and the spacing between these third elastic strands is 2 to 15 mm, or the stretching ratio of the fourth elastic strands is 150% to 350%, and the spacing between these fourth elastic strands is 0.5 to 2.5 mm.

[0017] As a preferred aspect, it further comprises a plurality of seventh elastic strands extending along the transverse direction for forming leg cuffs or leg opening barriers, wherein the seventh elastic strands are sandwiched between the first inner layer of nonwoven fabric and the outer layer of nonwoven fabric.

[0018] As a preferred aspect, the stretching force in the first and / or third elastic regions is substantially 290 to 400 grams-force, and the stretching force in the second and / or fourth elastic regions is substantially 235 to 285 grams-force. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a front view of an embodiment of a disposable pant-type absorbent article according to the present invention, wherein the disposable pant-type absorbent article is in a closed state and its garment-facing side is shown;

[0020] Figure 2 is a rear view of an embodiment of a disposable pant-type absorbent article according to the present invention, wherein the disposable pant-type absorbent article is in a closed state and its garment-facing side is shown;

[0021] Figure 3 is a side view of an embodiment of a disposable pant-type absorbent article according to the present invention, wherein the disposable pant-type absorbent article is in a closed state and its garment-facing side is shown;

[0022] Figure 4 is a top plan view of an embodiment of a disposable pant-type absorbent article according to the present invention, wherein the disposable pant-type absorbent article is in an open state and in a longitudinally and transversely stretched and flat configuration, and shows its body-facing side;

[0023] Figure 5 is based on Figure 1 A partial view of an embodiment of the invention;

[0024] Figure 6 is a cross-sectional view of an embodiment of a disposable pant-type absorbent article according to the present invention, wherein the distribution of the elastic region along the longitudinal direction of the pant-type absorbent article is schematically shown;

[0025] Figure 7 It is a consumer test chart of an embodiment of a disposable pants-type absorbent product according to the utility model, wherein the consumer test results of the pants-type absorbent product of the utility model and conventional products are given.

[0026] Reference numerals used repeatedly in the present specification and drawings are intended to represent the same or similar elements of the present invention.

[0027] Description of Reference Numerals

[0028] 10-pants absorbent product; 100-front area; 200-back area; 300-crotch area; 400-absorbent component

[0029] 101-first elastic zone; 102-second elastic zone; 103-front outer edge; 105-front outer cover layer

[0030] 106A-first elastic strand; 106B-second elastic strand; 110-first side edge;

[0031] 111 - first side seam; 112 - second side seam; 120 - leg opening;

[0032] 201 - third elastic zone; 202 - fourth elastic zone; 203 - rear outer edge; 205 - rear outer cover layer;

[0033] 206A-third elastic strand; 206B-fourth elastic strand; 210-second side edge;

[0034] 211 - third side seam; 212 - fourth side seam; 500 - seventh elastic strand;

[0035] 119-outer nonwoven fabric; 113-first inner nonwoven fabric; 113A-front region near the outer end;

[0036] 113B-front area near the inner end; 213-second inner layer of non-woven fabric; 213A-back area near the outer end;

[0037] 21BA-back area near the inner end; 116-innermost non-woven fabric; 116A-first end;

[0038] 116B- second end; 117, 118- adhesive layer; 106C- fifth elastic strand

[0039] 206C-sixth elastic strand; 114, 214-adhesive layer; L-longitudinal centerline;

[0040] T-horizontal fold line; X-horizontal; Y-vertical; DETAILED DESCRIPTION

[0041] Those skilled in the art will appreciate that the following description of the detailed embodiments is merely illustrative of exemplary embodiments and is not intended to limit the broader aspects of the present disclosure.

[0042] Definition of terms

[0043] With respect to absorbent articles, "disposable" means absorbent articles that are not generally intended to be laundered or otherwise restored or reused as absorbent articles (i.e., they are intended to be discarded after a single use, and preferably can be recycled, composted, or otherwise disposed of in an environmentally compatible manner). Disposable absorbent articles typically include an adhesive between layers and / or elements to hold the article together (e.g., the ears, side panels, and belts are bonded to the chassis via an adhesive, and the layers of the ears, side panels, belts, and chassis are bonded together using an adhesive). Alternatively, heat bonding and / or pressure bonding are used with or in place of the adhesive. In this case, portions of the material layers may become partially melted and pressed together so that upon cooling, they are physically bonded together.

[0044] "Pants" (also referred to as "training pants," "pre-closed diapers," "diaper pants," "pant diapers," and "pull-on diapers") refer herein to disposable absorbent articles designed for infants or adult wearers with a continuous peripheral waist opening and continuous peripheral leg openings. Pants can be constructed with a continuous or closed waist opening and at least one continuous closed leg opening before the article is applied to the wearer. Pants can be preformed or prefastened using a variety of techniques, including but not limited to joining the various parts of the article together using any refastenable closure member and / or permanent closure member (e.g., seams, heat bonds, pressure welds, adhesives, cohesive bonds, mechanical fasteners, etc.). Pants can be preformed anywhere along the circumference of the article in the waist region (e.g., side fastened or seamed, front waist fastened or seamed, rear waist fastened or seamed).

[0045] As used in the present invention, the term "nonwoven" or "nonwoven" generally refers to a web having a structure of individual fibers or yarns that is a sandwich, but not in a discernible manner such as a knitted fabric. Examples of suitable nonwoven or nonwoven fabrics or webs include, but are not limited to, meltblown webs, spunbond webs, bonded-carded webs, air-laid webs, coformed webs, hydroentangled webs, and the like.

[0046] As used in the present invention, the term "meltblown web" generally refers to a nonwoven web prepared by the following method, wherein: by extruding a molten thermoplastic material through a plurality of generally circular fine die capillaries as molten fibers into a gathered high-speed gas (e.g., air) stream, the fibers of the molten thermoplastic material are thinned to reduce their diameter. Thereafter, the meltblown fibers are transported by the high-speed gas stream and deposited on a collecting surface to form a web of randomly distributed meltblown fibers. In general, meltblown fibers can be continuous or discontinuous microfibers, generally less than 10 microns in diameter, and generally viscous when deposited on a collecting surface.

[0047] As used in the present invention, the term "spunbond web" generally refers to a web containing substantially continuous fibers of small diameter. The fibers are produced by extruding molten thermoplastic material through a plurality of fine, usually circular, spinneret capillaries, and then the diameter of the extruded fibers is rapidly reduced by, for example, lead-out drafting and / or other known spunbond mechanisms. "Proximal" and "distal" refer to the position of an element relatively close to or far from the longitudinal or lateral centerline of the structure, respectively (for example, relative to the same longitudinal axis, the position of the proximal edge of a longitudinally extending element to the longitudinal axis is closer than the position of the distal edge of the same element to the longitudinal axis).

[0048] "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 an element or surface is closer to the wearer than some other element or surface during wear. "Garment-facing" means that an element or surface is farther from the wearer than some other element or surface during wear (i.e., the element or surface is near the wearer's clothing, which may be worn over a disposable absorbent article).

[0049] As used in the present invention, the term "stretchable" or "extensibility" generally refers to a material that stretches or elongates its relaxed length or width by at least about 25%, in some embodiments about 50%, and in some embodiments at least about 75% in the direction of force. A stretchable material does not necessarily have recovery properties. For example, an elastomeric material is an stretchable material with recovery properties. A meltblown web may be stretchable but not have recovery properties and is therefore an stretchable non-elastic material.

[0050] As used in the present invention, the term "elastomeric" or "elastic" generally refers to a material that is stretched in at least one direction (e.g., MD direction) by applying a stretching force, and that shrinks / recovers to approximately its original size by releasing the stretching force. For example, a stretched material may have a stretched length that is at least about 50% longer than its relaxed, unstretched length, and, by releasing the stretching force, it may recover to a length within at least 50% of its stretched length. A hypothetical example may be a 1 inch sample of a material that may be stretched to 1.50 inches and, by releasing the stretching force, will recover to a length of no more than 1.25 inches. Ideally, the material shrinks or recovers by at least 50%, and even more ideally, at least 80% of the stretched length.

[0051] As used herein, the term "bonded" refers herein to the joining, adhering, connecting, attaching, etc. of two elements. Two elements will be considered to be joined together when they are joined, adhered, connected, attached, etc. directly to each other or indirectly to each other, such as when bonded to an intermediate element. Bonding can be performed via, for example, adhesives, pressure bonds, heat bonds, ultrasonic bonds, splicing, stitching, and / or welding.

[0052] As used herein, the term "elastic strand" includes an elastic elongated material, such as but not limited to elastic rubber bands. The elastic rubber bands can be made of spandex in a warp beam manner according to a spinning process.

[0053] The term "open" means that the opposing waist regions are not initially joined to form a continuous waist opening and leg openings prior to or during application of the article to a wearer.

[0054] The term "closed" means that the opposing waist regions are permanently or refastenably joined when encapsulated to form a continuous waist opening and leg openings.

[0055] Disposable pant-type absorbent products

[0056] First, the basic structure of the disposable pants-type absorbent product of this embodiment will be described with reference to the drawings. Figures 1 to 3 An embodiment of a disposable pant-type absorbent article is shown in a closed state with its body-facing side shown in front, rear and side views, respectively. Figure 4 is a top plan view of an embodiment of a disposable pant-type absorbent article according to the present invention, wherein the disposable pant-type absorbent article is in an open state and in a longitudinally and transversely stretched and flat configuration, and its body-facing side is shown.

[0057] like Figure 1-6 As shown in FIG. 1 , according to the disposable pant-type absorbent article 10 of the present invention, the absorbent article 10 can be as Figure 4 As shown along its longitudinal center line from Figure 4 The absorbent article 10 is generally divided into three regions from the upper side to the lower side, namely, a front region 100 including a front sheet (which is formed by laminating multiple layers of nonwoven fabrics and elastic strands as described below), a back region 200 including a back sheet (which is also formed by laminating multiple layers of nonwoven fabrics and elastic strands as described below), and a crotch region 300 disposed between the front region 100 and the back region 200. The front region 100 and the back region 200 are respectively located at the upper and lower ends of the absorbent article 10, and the absorbent article 10 can also define a longitudinal center line L passing through the front region 100, the crotch region 300 and the back region 200 from top to bottom. Further, in Figure 4 Also shown is a transverse folding line that passes through the crotch area 300 from left to right perpendicular to the longitudinal center line L, so that when the front area 100 and the back area 200 of the disposable pant-type absorbent article 10 are folded relative to the transverse folding line T, they can be attached to each other with the help of the side seams described below to define a pant-type wearing configuration with a waist opening and a pair of leg openings.

[0058] In this embodiment, the absorbent article 10 has a longitudinal direction Y and a transverse direction X. The absorbent article 10 is intended to be worn around the lower torso of an infant. Here, the extent and size of the front region 100 and the back region 200 are designed to serve as the following areas of the absorbent article 10 that are circumferentially fitted around at least the waist area of ​​the wearer of the absorbent article 10 (including, for example, the wearer's lower back, buttocks, hips and abdomen) after the infant has put on the absorbent article 10. The crotch region 300 of the absorbent article 10 is the following area of ​​the absorbent article 10 that will be positioned between the legs of the wearer when the absorbent article 10 is worn on the wearer.

[0059] like Figure 1-4 As shown in FIG. 1 , in order to allow the absorbent article to absorb exudates such as urine and feces discharged by the wearer or infant, the absorbent article 10 has an absorbent assembly 400 in the crotch region 300. Here, as shown in FIG. Figure 4 As shown, at least a portion of the absorbent assembly 400 overlaps a portion of the front region 100, and at least a portion of the absorbent assembly 400 overlaps a portion of the back region 200. Thus, the absorbent assembly 200 may be bonded to each overlapping region of the front region 100 and the back region 200. In various embodiments, the overlapping region of each of the front region 100 and the back region 200 is elastic.

[0060] As an example, according to the absorbent assembly 400 of the present embodiment, there can be at least a top sheet layer, a back sheet layer and an absorbent core positioned between the top sheet layer and the back sheet layer. Wherein the top sheet layer limits the body-facing surface of absorbent article 10, and this surface can directly contact the body of the wearer, and is liquid-permeable to receive body exudates. The top sheet layer advantageously provides for comfort, and plays the function of body exudates being passed through its own structure and directed away from health towards the absorbent cores. The top sheet layer advantageously retains little liquid or does not retain liquid in its structure, so that it provides a relatively comfortable and non-irritating surface next to the skin of absorbent article 10 wearers.

[0061] In various embodiments, the top sheet layer can be constructed of various nonwoven webs such as meltblown webs, spunbonded webs, spunlace webs or air-through bonded carded webs. Examples of suitable top sheet layer materials may include, but are not limited to, natural fiber webs (such as cotton), rayon, spunlace webs, polyester, polypropylene, polyethylene, nylon or other heat-bondable fibers (such as bicomponent fibers), polyolefins, copolymers of polypropylene and polyethylene, linear low-density polyethylene and aliphatic esters (such as polylactic acid) bonded carded webs. Finely perforated films and web materials may also be used, as may the laminates of these materials or combinations thereof.

[0062] In various embodiments, the top sheet layer can have a basis weight within the scope of about 5,10,15,20 or 25gsm to about 50,100,120,125 or 150gsm.For example, in one embodiment, the top sheet layer can be constructed by a basis weight of an air-through bonding carded web within the scope of about 15gsm to about 100gsm.In another example, the top sheet layer can be constructed by a basis weight of an air-through bonding carded web within the scope of about 20gsm to about 50gsm, such as the air-through bonding carded web that can be easily obtained from nonwoven manufacturers such as Xiamen Yanjiang Industry & Trade Co., Ltd., Beijing Dayuan Nonwoven Co., Ltd., etc.

[0063] Further absorption assembly 400 also comprises the absorbent core positioned between the top sheet layer and the back sheet layer of absorbent article 10.Absorbent core can be the combination of any single layer structure or layer parts usually, and it can show a certain degree of compressibility, conformability, non-irritating to the wearer's skin and can absorb and keep liquid and other body exudates.In various embodiments, absorbent core can be formed by a variety of different materials and can comprise the required layer of any number.For example, absorbent core can comprise one or more layers (for example, two layers) of following absorption net material: cellulose fiber (for example, wood pulp fiber), other natural fibers, synthetic fibers, weaving or nonwoven sheet, scrim netting or other stabilization structures, superabsorbent material, binder material, surfactant, selected hydrophobic and hydrophilic materials, pigment, lotion, odor control agent etc. and their combination.In various embodiments, if desired, absorbent core can comprise the superabsorbent material of optional amount. Examples of suitable superabsorbent materials may include poly(acrylic acid), poly(methacrylic acid), poly(acrylamide), poly(vinyl ether), copolymers of maleic anhydride with vinyl ether and α-olefin, poly(vinyl pyrrolidone), poly(vinyl morpholinone), poly(vinyl alcohol), and salts and copolymers thereof.

[0064] The shape of the absorbent core can vary as desired and can include any of a variety of shapes, including, but not limited to, triangular, rectangular, dog-bone, oval, trapezoidal, T-shaped, I-shaped, and hourglass. In various embodiments, the absorbent core can have a shape that generally corresponds to the overall shape of the absorbent article 10. The size of the absorbent core can be substantially similar to the size of the absorbent article 10, but it should be understood that the size of the absorbent core, while being similar, will often be smaller than the size of the entire absorbent article 10 so as to be fully contained therein.

[0065] The backsheet layer of absorbent assembly 400 is generally liquid-impermeable and is the part of absorbent article 10 facing the wearer's clothing. Backsheet layer can allow air or steam to flow out of absorbent article 10, while still blocking the process of liquid. Any liquid-impermeable material can be used to form backsheet layer usually. Liquid-impermeable layer can be composed of single layer or multilayer, and these one or more layers themselves can comprise similar or different materials. Operable suitable material can be microporous polymer film, such as polyolefin film, nonwoven and nonwoven laminate and film / nonwoven laminate of polyethylene or polypropylene. The specific structure and composition of backsheet layer can be selected from various known films and / or fabrics, and specific material is suitably selected to provide liquid barrier, intensity, wear resistance, tactile properties, aesthetics etc. of desired level.

[0066] like Figure 4 and 6As best shown in FIG. 1 , when the disposable pant-type absorbent article 10 is in an open state and stretched longitudinally and transversely and laid flat, the absorbent assembly 400 is fixedly attached to the innermost nonwoven fabric 116 located therebelow by means of an adhesive layer 118 directly below the absorbent assembly 400. Here, as an example, the innermost nonwoven fabric can be selected from air-through nonwoven fabrics, spunbond nonwoven fabrics, spunbond meltblown nonwoven fabrics, or air-through / spunbond / spunbond meltblown nonwoven fabrics with pattern printing, and the fine denier of the material fibers of these nonwoven fabrics can be, for example, 0.6 denier to 3.0 denier or 5 to 30 microns, and the gram weight of the nonwoven fabrics ranges from 8 g / m2 to 32 g / m2. Figure 4 As shown in , the innermost nonwoven fabric 116 is generally symmetrical about the longitudinal center line L in the transverse direction X and is also generally symmetrical about the transverse folding line T in the longitudinal direction Y. More specifically, the innermost nonwoven fabric 116 has a first end 116A extending from the transverse folding line T along the longitudinal direction Y by a certain length L2 to extend beyond the crotch region 300 to the front region 100, and also has a second end 116B extending from the transverse folding line T along the longitudinal direction Y by a certain length L5 to extend beyond the crotch region 300 to the back region 100.

[0067] Next, below the innermost nonwoven fabric 116, within the front region 100, there is a first inner nonwoven fabric 113 extending in the longitudinal direction Y, and the first inner nonwoven fabric 113 and the innermost nonwoven fabric 116 are fixedly connected to each other by means of an adhesive layer 117. The first inner nonwoven fabric 113 can be selected from hot air nonwoven fabric, spunbond nonwoven fabric, spunbond meltblown nonwoven fabric, or hot air / spunbond / spunbond meltblown nonwoven fabric with pattern printing. The fine denier of the material fibers of these nonwoven fabrics can be, for example, 0.6 denier to 3.0 denier or 5 to 30 microns, and the gram weight of the nonwoven fabric ranges from 8 g / m2 to 32 g / m2. Figure 4 As shown in , the first inner layer nonwoven fabric 113 is substantially symmetrical about the longitudinal center line L in the transverse direction X, and the first inner layer nonwoven fabric 113 extends from the bottom of the innermost layer nonwoven fabric 116 in the direction away from the transverse folding line T in the front region 100 until the front outer edge 103 of the front region 100, and then reversely folds (i.e., folds back at the front outer edge 103 of the front region 100 to extend toward the transverse folding line T) and extends a certain length L3. For this reason, the end of the first inner layer nonwoven fabric 113 close to the front outer edge 103 can be called the front region outer end 113A, and the end of the first inner layer nonwoven fabric 113 close to the innermost layer nonwoven fabric 116 can be called the front region inner end 113B, wherein the length L3 can be the distance between the front region outer end 113A and the front outer edge 103 of the front region 100 along the longitudinal direction. Here, preferably, the front region of the first inner nonwoven fabric 113 is not in contact with the absorbent assembly at the outer end 113A.

[0068] Correspondingly, below the innermost nonwoven fabric 116, within the scope of the rear area 200, there is a second inner nonwoven fabric 213 extending in the longitudinal direction Y, and the second inner nonwoven fabric 213 and the innermost nonwoven fabric 116 are fixedly connected to each other by means of an adhesive layer 117. The second inner nonwoven fabric 213 can be selected from hot air nonwoven fabric, spunbond nonwoven fabric, spunbond meltblown nonwoven fabric, or hot air / spunbond / spunbond meltblown nonwoven fabric with pattern printing. The fine denier of the material fibers of these nonwoven fabrics can be, for example, 0.6 denier to 3.0 denier or 5 to 30 microns, and the gram weight range of the nonwoven fabric is 8 g / m2 to 32 g / m2. Figure 4 As shown in , the second inner layer nonwoven fabric 213 is substantially symmetrical about the longitudinal center line L in the transverse direction X, and the second inner layer nonwoven fabric 213 extends from the bottom of the innermost layer nonwoven fabric 116 in the direction away from the transverse folding line T in the back region 200 until the rear outer edge 203 of the back region 200, and then reversely folds (i.e., folds back at the rear outer edge 203 of the back region 200 to extend toward the transverse folding line T) and extends a certain length L6. For this reason, the end of the second inner layer nonwoven fabric 213 close to the rear outer edge 203 can be called the rear region outer end 213A, and the end of the second inner layer nonwoven fabric 213 close to the innermost layer nonwoven fabric 116 can be called the rear region inner end 213B, wherein the length L6 can be the distance between the rear region outer end 213A and the rear outer edge 203 of the back region 200 along the longitudinal direction.

[0069] Further, it is best to Figure 6 As shown in the figure, the pants-type absorbent product 10 also includes an outer non-woven fabric 119 located on the outermost side, wherein the outer non-woven fabric 119 is substantially symmetrical about the longitudinal center line L in the transverse direction X and the outer non-woven fabric 119 extends under the first inner non-woven fabric 113 and the second inner non-woven fabric 213 and extends in the front area 100 and the back area 200 respectively to the front outer edge 103 and the back outer edge 203 of the front area 100 and the back area 200, and then is folded in the opposite direction and extended to a certain length, and then is fixedly connected to the absorption component 400 by means of the adhesive layer 114, thereby achieving the encapsulation of the absorption component 400 and the inner non-woven fabric. Here, the outer layer nonwoven fabric 119 can be hot air nonwoven fabric, spunbond nonwoven fabric, spunbond meltblown nonwoven fabric or hot air / spunbond / spunbond meltblown nonwoven fabric with pattern printing. The diameter of the material fibers of these nonwoven fabrics is 5 to 30 microns, and the gram weight range of the nonwoven fabric is 10 g / m2 to 35 g / m2.

[0070] In order to meet the performance requirements of the pants-type absorbent article when worn, it is desirable to make the front region 100 and the back region 200 stretchable in the transverse direction when applying a tensile force in the transverse direction X direction, and retract / return at least a portion of its stretched length when releasing the tensile force, and it is desirable to retract / return to its original size. It can be at least partially composed of a laminate with multiple elastic strands, which can be sandwiched between at least one nonwoven layer, wherein the nonwoven layer can be folded onto itself. The elastic strand can be preformed by, for example, LYCRA brand fiber / yarn. LYCRA is a registered trademark of EI DuPont De Nemours Co., Wilmington, DE, USA. The elastic strand can have a circular, semicircular, square, rectangular, oval or other geometric configuration. The elastic strand can be sandwiched between at least one nonwoven or between at least two nonwovens by an adhesive, ultrasonic bonding, heat pressure sealing or any other suitable means.

[0071] The inventors of the present invention have found that improved fit can be achieved by controlling the strand spacing, strand fineness and stretch ratio between the elastic strands relative to each other and the opening for the body. This can be achieved by selecting different elastic strands in the front region 100 and the back region 200 that exhibit the desired properties. The different elastic strands are combined with designed or planned strand spacing, strand fineness and stretch ratio to produce an elastic laminate of a pant-type absorbent article that is used to dynamically generate a fit. This improved fit translates into reduced sagging and / or gap formation around the opening of the elastic laminate. This will be discussed below in conjunction with the attached drawings. Figure 1-6 The various features of the different parts of a possible embodiment are shown in more detail.

[0072] like Figure 4As shown, from the front outer edge 103 of the front region 100, there is a first elastic region 101 in the region where the first inner nonwoven fabric 113 and the outer nonwoven fabric 119 are folded about the front outer edge 103, wherein the range and size of the first elastic region 101 are designed to be used as a circumferentially fitted waistband region around the waist region of the infant or the intended wearer after the infant wears the absorbent article 10, and for the waistband region, it corresponds to the region where the body structure of the wearer moves greatly as the wearer moves, i.e., the high motion region. Therefore, the relatively high force in this high motion region tends to cause red marks on the skin and restrictions on the freedom of movement. At the same time, the pant-type absorbent article can be reliably fixed to the body of the wearer, tending to have a higher fit. Here, the first elastic region 101 can be a length extending from the front outer edge 103 toward the transverse folding line T for more than 5 mm, preferably extending in the range of 5 to 60 mm. To this end, after comprehensively considering these demand factors, the inventor proposes that in the first elastic zone 101 of the front region 100, preferably 1 to 20 elastic strands 106A with a strand fineness of 200 to 1000 deniers are sandwiched between the folded portion of the first inner nonwoven fabric 113 and the folded portion of the outer nonwoven fabric 119 and the unfolded portion of the first inner nonwoven fabric 113 in a manner that they are aligned in parallel and can be evenly spaced from each other. In various embodiments, the spacing between each elastic strand 106A in the first elastic zone 101 of the front region 100 can be about 2 mm or more, preferably 2 to 15 mm. Here, these elastic strands 106 have been stretched to a certain stretch ratio when laminated between the first inner nonwoven fabric 113. The stretch ratio is the length increment percentage of one elastic strand or multiple elastic strands when the elastic component having the first nonwoven fabric layer and / or the second nonwoven fabric layer is combined to form. For example, a strand having a free length of 10 centimeters (cm) may have a load applied such that the 10 cm elastic strand is now 15 cm long. This 5 cm length increment is 50% (5 / 10) of 10 cm, or a 50% strain. The stretch ratio may be used to change the elastic force characteristics of a single elastic strand or multiple elastic strands. Here, the stretch ratio of multiple elastic strands 106A may be designed to be greater than 150%, preferably 150% to 300%.

[0073] Correspondingly, since the waistband area of ​​the pants-type absorbent article is provided by the back region 200 on the back side of the infant, the inventor also proposes that preferably 1 to 20 elastic strands 206A with a strand fineness of 200 to 1000 deniers are sandwiched between the folded portion of the second inner nonwoven fabric 213 and the folded portion of the outer nonwoven fabric 119 and the unfolded portion of the second inner nonwoven fabric 213 in the third elastic region 201 of the back region 100 in a manner that they are aligned parallel to each other and can be evenly spaced apart from each other. In various embodiments, the spacing between each elastic strand 206A in the third elastic region 201 of the back region 100 can be about 2 mm or more, preferably 2 to 15 mm. Here, the stretching ratio of the plurality of elastic strands 206A can be designed to be 150% or more, preferably 150% to 300%. Here, the third elastic zone 201 may extend from the rear outer edge 203 toward the transverse folding line T to a length of more than 5 mm, preferably to a length ranging from 5 to 60 mm.

[0074] Without being limited to the relevant theories, the inventors have found that at least due to the elastic strands 206A being sandwiched between the folded portion of the inner nonwoven fabric and the folded portion of the outer nonwoven fabric 119 and the undone portion of the inner nonwoven fabric, and the elastic strands being separated from the skin of infants and young children by the outer nonwoven fabric 119, the disadvantages of this type of pant-type absorbent product, such as red marks on the skin in the high movement area of ​​infants and young children and restrictions on the freedom of movement, are significantly reduced without affecting the fit of the waistband area. Particularly satisfactorily, since the elastic strands with a relatively thick diameter are sandwiched between the folded portion of the inner nonwoven fabric and the folded portion of the outer nonwoven fabric 119 and the undone portion of the inner nonwoven fabric and are shielded by the outer nonwoven fabric 119, the waist area of ​​the pant-type absorbent product 10 designed in this way presents a good product appearance and a satisfactory visual effect for consumers, that is, avoiding the consumers from intuitively seeing the thick elastic strands and thus having an intuitive feeling of being strangled.

[0075] More preferably, in order to better adjust the fit of the waistband area, a certain fifth elastic strand 106C and a sixth elastic strand 206C may be added in the first elastic zone 101 and the third elastic zone 203. The inventors found that, for example, in the first elastic zone 101 of the front zone 100, preferably 1 to 50 fifth elastic strands 106C with a strand fineness of 40 to 300 deniers are sandwiched between the folded portion of the first inner nonwoven fabric 113 and the folded portion of the outer nonwoven fabric 119 in a manner that they are aligned parallel to each other and can be evenly spaced apart from each other. In various embodiments, the spacing between each elastic strand 106A in the first elastic zone 101 of the front zone 100 can be about 0.5 mm or more, preferably 0.5 to 2.5 mm. The stretching ratio of these fifth elastic strands 106C is designed to be 150% or more, preferably 150% to 350%. Since the strand thickness of these fifth elastic strands 106C is significantly smaller than the diameter of the first elastic strands 106A and are located on the skin-facing side of the pants-type absorbent product (rather than the clothes-facing side visible to the naked eye of consumers), such a design will not affect the good product appearance and satisfactory visual effects of the waist area of ​​the pants-type absorbent product 10, but while ensuring the wearing functionality, the actual wearing pressure can be reduced by about 25% or more, thereby reducing the pressure on the waist skin of infants and young children to avoid red marks on the skin and restrictions on freedom of movement.

[0076] Correspondingly, in the third elastic zone 201 of the back region 200, preferably 1 to 50 sixth elastic strands 206C with a strand fineness of 40 to 300 deniers are sandwiched between the folded portion of the second inner nonwoven fabric 213 and the folded portion of the outer nonwoven fabric 119 in a manner that they are aligned in parallel and can be evenly spaced apart from each other. In various embodiments, the spacing between each elastic strand 206C in the third elastic zone 201 of the back region 200 can be about 0.5 mm or more, preferably 0.5 to 2.5 mm. The stretching ratio of these sixth elastic strands 206C is designed to be 150% or more, preferably 150% to 350%. Since the strand thickness of these sixth elastic strands 206C is significantly smaller than the diameter of the first elastic strands 106A and are located on the skin-facing side of the pants-type absorbent article (rather than the clothes-facing side visible to the naked eye of consumers), such a design will not affect the good product appearance and satisfactory visual effects of the waist area of ​​the pants-type absorbent article 10, but while ensuring the wearing functionality, the actual wearing pressure can be reduced by about 25% or more, thereby reducing the pressure on the waist skin of infants and young children to avoid red marks on the skin and restrictions on freedom of movement.

[0077] Furthermore, Figure 4 and 6As shown, starting from the front outer edge 103 of the front region 100, there is also a second elastic region 102 in the area where the outer nonwoven fabric 119 is folded about the front outer edge 103, wherein the range and size of the second elastic region 102 are designed to be used as a circumferentially fitting abdominal band area around the abdominal area of ​​the infant or the intended wearer after the infant wears the absorbent article 10. Here, the second elastic region 102 can be from the inner edge of the first elastic region 101 (at Figure 4 The length of the waistband area is the length of the waistband area extending from the side close to the transverse folding line T to the transverse folding line T for more than 25 mm, preferably extending in the range of 25 to 90 mm. For the waistband area, it corresponds to the area where the wearer's body structure moves slightly as the wearer moves, that is, the low-motion area. Therefore, compared with the high-motion area, it does not require too high a fit force, but it is hoped that there will be a variable force characteristic part to ensure better fit with the wearer's body. Furthermore, due to the large area of ​​these areas, it is expected to have a good product appearance and a visual effect that satisfies consumers.

[0078] Therefore, after comprehensively considering these demand factors, the best way is Figure 5 As shown, the inventor proposes that in the second elastic zone 102 of the front region 100, preferably 20 to 800 second elastic strands 106B with a strand fineness of 40 to 300 deniers are sandwiched between the first inner nonwoven fabric 113 and the outer nonwoven fabric 119 in a manner that they are aligned parallel to each other and can be evenly spaced apart from each other. In various embodiments, the spacing between the second elastic strands 106B in the second elastic zone 102 of the front region 100 can be about 0.5 mm or more, preferably 0.5 to 2.5 mm. Here, these elastic strands 106B have been stretched to a certain stretch ratio when laminated between the first inner nonwoven fabric 113 and the outer nonwoven fabric 119. Here, the stretch ratio of the plurality of elastic strands 106B can be designed to be 150% or more, preferably 150% to 350%. Since the strand thickness of these second elastic strands 106B is significantly smaller than the diameter of the elastic strands in known products, such a design can present a good product appearance and a visual effect that satisfies consumers, and can have good fit while ensuring wearability (given in detail below).

[0079] like Figure 4 and 6As shown, starting from the rear outer edge 203 of the back region 200, there is also a fourth elastic region 202 in the area where the outer nonwoven fabric 119 is folded about the rear outer edge 203, wherein the range and size of the fourth elastic region 202 are designed to form a hip belt area that fits the hip area of ​​the infant or the intended wearer in a circumferential direction after the infant wears the absorbent article 10. Here, the fourth elastic region 202 can be from the inner edge of the third elastic region 201 (at Figure 4 The length of the hip belt area is more than 25 mm (in the middle, the length of the hip belt area is the side close to the transverse folding line T) and extends toward the transverse folding line T, preferably in the range of 25 to 90 mm. For the hip belt area, it corresponds to the area where the wearer's body structure moves slightly as the wearer moves, that is, the low-motion area. Therefore, compared with the high-motion area, it does not require too high a fit force, but it is hoped that there will be a variable force characteristic part to ensure better fit with the wearer's body. Furthermore, since these areas are large in area, it is expected to have a good product appearance and a visual effect that satisfies consumers.

[0080] Best as Figure 6 As shown, the inventor proposes that in the fourth elastic zone 202 of the back region 200, preferably 20 to 800 fourth elastic strands 206B with a strand fineness of 40 to 300 deniers are sandwiched between the second inner nonwoven fabric 213 and the outer nonwoven fabric 119 in a manner that they are aligned parallel to each other and can be evenly spaced apart from each other. In various embodiments, the spacing between the fourth elastic strands 206B in the fourth elastic zone 202 of the back region 200 can be about 0.5 mm or more, preferably 0.5 to 2.5 mm. Here, these elastic strands 206B have been stretched to a certain stretch ratio when laminated between the second inner nonwoven fabric 213 and the outer nonwoven fabric 119. Here, the stretch ratio of the plurality of elastic strands 206B can be designed to be 150% or more, preferably 150% to 350%. Since the strand thickness of these fourth elastic strands 206B is significantly smaller than the diameter of the elastic strands in known products, such a design can present a good product appearance and a visual effect that satisfies consumers, and can have good fit while ensuring wearability (given in detail below).

[0081] Preferably, the pant-type absorbent article 10 may also have a plurality of seventh elastic strands 500 extending in the transverse direction for forming leg cuffs or leg opening barriers, wherein these seventh elastic strands 500 are sandwiched between the third inner nonwoven fabric 116 and the outer nonwoven fabric 119. Each elastic strand 500 that can be used as a leg opening barrier can be a single strand of an elastomeric material, for example Figure 4 It should be understood that the seventh elastic strand 500 is optional.

[0082] Therefore, the elastic area in the pants-type absorbent product 10 is defined by the elastic strands mentioned above, wherein the elastic area has a longitudinal length L1 and a longitudinal length L4 in the front area 100 and the back area 200 respectively along the longitudinal Y direction, wherein the longitudinal length L1 and the longitudinal length L4 of the elastic area may be the same or different, and may be more than 70% of the total longitudinal length of the front area 100 and the back area 200.

[0083] exist Figures 1 to 3 1 shows a pant-type absorbent article 10 in a wearable configuration. Figure 4 The pant-type absorbent article 10 in the open state is transformed into a wearing configuration, and the pant-type absorbent article 10 has a first side edge 110 extending in the longitudinal direction and symmetrically arranged relative to the longitudinal center line L in the front region 100, wherein the first side edge 110 is substantially perpendicular to the front outer edge 103. Correspondingly, the rear region 200 has a second side edge 210 extending in the longitudinal direction and symmetrically arranged relative to the longitudinal center line L, wherein the second side edge 210 is substantially perpendicular to the rear outer edge 203. In order to place the absorbent article 10 in the wearing configuration to be worn around the lower torso of the wearer, the front region 100 is located at Figure 4 The first side edge 110 on the left side of the middle region can be temporarily or permanently bonded to the corresponding second side edge 210 in the back region 200 by means of ultrasonic welding, adhesive or fasteners such as Velcro to form a first side seam 111 and a third side seam 211, and is located Figure 4 The first side edge 110 on the right side of the middle portion can be bonded to the corresponding second side edge 210 to form a second side seam 112 and a fourth side seam 212. These side seams thus formed can produce a wearable absorbent article 10 (e.g., a waist opening and a pair of leg openings 120) having a waist opening and a pair of leg openings 120. Figure 3 ). In the pants-type absorbent article 10, for example, a front outer cover layer 105 located in the front region 100 and facing the clothing side and a rear outer cover layer 205 located in the rear region 200 and facing the clothing side can be formed by means of an outer nonwoven fabric 119.

[0084] Mechanical properties test

[0085] For this test, a sample is prepared from a fully assembled pant-type absorbent article. The garment is placed on two spaced-apart flat rods, one of which is positioned to contact the front region and the other is positioned to contact the back region. The flat rods are moved away from each other to stretch the garment to a distance 20% greater than the relaxed position of the garment.

[0086] Alternatively, the test is performed on an Advantage pneumatic grip controller with an MTS Insight 1EL 820.001-EL using TESTWORKS 4.0 software. The test bar is loaded so that a six-inch length of sample is loaded in the vertical direction, with 1 inch on each end of the sample held by the grip. A preload of about 10 to 15 grams is set, but it is set to zero before the test is performed. The test pulls the sample to 70% of the tensile gauge length and then back to zero as one cycle. The test speed is 20 inches of tension or stress per minute. The test reports the stress of the stretch and retraction from 0% stretch to 70% and then back to 0%.

[0087] It is found that the stretching force of the first elastic zone corresponding to the waist can provide a stretching force higher than that of the second elastic zone of the abdomen or buttocks. Without being bound by theory, it is believed that the distribution of such stretching forces by region can make the pants-type absorbent product of the utility model conform to the human body well, specifically conform to the lower body of children less than 36 months old, thereby providing good fit and comfort to the wearer without sagging prevention or leakage prevention. That is, the front proximal waist area is subjected to high stretching forces, so that the product can be anchored against the wearer's swivel, while leaving more area for the hip area to adapt to the wearer's buttocks. Specifically, the stretching force in the first and / or third elastic zone is generally 290 to 400 grams of force, while the stretching force in the second and / or fourth elastic zone corresponding to the abdomen or buttocks is generally 235 to 285 grams of force.

[0088] Consumer acceptance testing

[0089] 20 expert panelists who are baby caregivers were recruited to rate the softness and comfort of the pants-type absorbent products of the present invention and the existing pants-type absorbent products on the market. A sensory test of softness was conducted, and the softness was graded from 0 to 10 (0 points for the worst softness and 10 points for the best softness). The softness of the pants-type absorbent products of the present invention was more than 2 points higher than that of ordinary products, indicating that the pants-type absorbent products designed with the present invention have obvious softness and density and can be clearly perceived by the expert panel.

[0090] Consumer wearing tests were also conducted in multiple locations, in which more than 100 consumers aged 25 to 35 were recruited for comparative testing, and the conclusion was drawn that the pants-type absorbent product according to the utility model has obvious advantages in terms of preference, softness, fineness of hand feel, fit and no red marks.

[0091] As for the fit of the pants-type absorbent products, more than 20 infants and young children were invited to conduct a try-on test. The test results show that the pants-type absorbent products according to the utility model have a very good fit and do not have problems such as falling. At the same time, no marks or red marks are produced during the actual wearing process of infants and young children.

[0092] According to the above test results, the utility model uses elastic strands with different properties to innovatively carry out reasonable combination design, thereby fundamentally reducing the red marks and strangulation marks on the waist after wearing by infants and young children. With the innovative combination and stretching ratio range of different elastic strands proposed by the utility model, combined with the combination design of non-woven fabrics, the invisible effect of the sandwiched elastic strands is achieved, and consumers can generally not see the sandwiched elastic strands from the appearance without paying strict attention, while ensuring that the absorbent product has excellent fit, and especially advantageously, it can also achieve a unique delicate wrinkled appearance and soft feel. The above product performances are very beneficial to improving the competitiveness of the product.

[0093] Previously, the embodiments of the present invention have been illustrated and described, but those skilled in the art should know that the above and other various changes, omissions, and additions can be made without departing from the spirit and scope of the present invention. It should not be limited to the specific embodiments described herein, and it includes all possible embodiments that can be embodied within the scope and equivalent scope of the features described in the attached claims.

[0094] The dimensions and values ​​disclosed herein should not be understood as being strictly limited to the exact numerical values ​​recited. Instead, unless otherwise indicated, each such dimension is intended to represent the recited value and a functionally equivalent range around that value. For example, a dimension disclosed as "40 millimeters" is intended to mean "about 40 millimeters."

[0095] All documents cited in the "Specific Implementation Methods" are incorporated herein by reference in relevant parts; the reference to any document shall not be interpreted as an admission that it is prior art with respect to the present utility model. In the event of any meaning or definition of a term in this written document conflicting with any meaning or definition of a term in a document incorporated by reference, the meaning or definition assigned to the term in this written document shall prevail.

[0096] Although specific embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various other changes and modifications may be made without departing from the spirit and scope of the present invention. Therefore, it is intended to cover all such changes and modifications within the scope of the present invention in the appended claims.

[0097] When introducing elements of the present invention or its preferred embodiment(s), the articles "a", "an", "the" and "said" are intended to indicate the presence of one or more elements. The terms "comprise", "include" and "have" are intended to be inclusive and mean that in addition to the listed elements, additional elements may be present. Many modifications and variations may be made to the present invention without departing from the spirit and scope of the present invention. Therefore, the above embodiments should not be used to limit the scope of the present invention.

Claims

1. A disposable pant-type absorbent article having a front region, a back region, and a crotch region disposed between the front region and the back region, wherein the absorbent article defines a longitudinal centerline and a transverse fold line for converting the disposable pant-type absorbent article into a wearing configuration, characterized in that: include; a front panel located in the front region and a back panel located in the back region, and an absorbent assembly located in the crotch region and extending into the front panel and the back panel; wherein each of the front panel and the back panel has a front outer edge and a back outer edge, a first side edge and a second side edge located on both sides of a longitudinal centerline, each of the front panel and the back panel further has a front outer cover layer and a back outer cover layer facing the garment surface, wherein the front panel in the front region can be joined to the back panel in the back region to form a pair of side seams, thereby defining a waist opening and a pair of leg openings; wherein the absorbent assembly has a body-facing topsheet layer and a garment-facing backsheet layer and an absorbent core positioned between the topsheet layer and the backsheet layer; and an innermost nonwoven fabric layer located below the backsheet layer, wherein the innermost nonwoven fabric layer has a length extending into the front sheet and the back sheet respectively along the longitudinal center line; The front piece of the front area comprises: A first inner layer of nonwoven fabric extending below the innermost layer of nonwoven fabric in the front region, which is designed to extend from below the innermost layer of nonwoven fabric to the front outer edge of the front region and then be folded back for a certain length; An outer nonwoven fabric extending below the first inner nonwoven fabric in the front region is designed to extend from a transverse folding line to the front outer edge of the front region and then be folded back for a certain length; A first elastic zone is designed to extend from the front outer edge toward the transverse folding line T for a length of more than 5 mm, wherein in the first elastic zone, between the folded portion of the first inner nonwoven fabric and the folded portion of the outer nonwoven fabric and the folded portion of the first inner nonwoven fabric, 1 to 20 first elastic strands with a strand fineness of 200 to 1000 deniers and a stretching ratio of more than 150% are sandwiched, wherein the spacing between these first elastic strands is more than 2 mm; The second elastic zone is designed to extend from the inner edge of the first elastic zone toward the transverse folding line T for a length of more than 25 mm, wherein 20 to 800 second elastic strands with a strand fineness of 40 to 300 deniers and a stretching ratio of more than 150% are sandwiched between the first inner non-woven fabric and the outer non-woven fabric in the second elastic zone, wherein the spacing between the second elastic strands is more than 0.5 mm; Wherein, in the front area, the stretching force of the first elastic zone is higher than the stretching force of the second elastic zone.

2. The disposable pant-type absorbent product according to claim 1, characterized in that: The rear piece of the rear area comprises: A second inner layer of nonwoven fabric extending below the innermost layer of nonwoven fabric in the rear region, which is designed to extend from below the innermost layer of nonwoven fabric to the rear outer edge of the rear region and then be folded back for a certain length; An outer nonwoven fabric extending below the second inner nonwoven fabric in the rear region is designed to extend from the transverse folding line to the rear outer edge of the rear region and then be folded back for a certain length; A third elastic zone is designed to extend from the rear outer edge toward the transverse folding line T to a length of more than 5 mm, wherein in the third elastic zone, between the folded portion of the second inner nonwoven fabric and the folded portion of the outer nonwoven fabric and the folded portion of the second inner nonwoven fabric, 1 to 20 third elastic strands with a strand fineness of 200 to 1000 deniers and a stretching ratio of more than 150% are sandwiched, wherein the spacing between these third elastic strands is more than 2 mm; A fourth elastic zone, which is designed to extend from the inner edge of the third elastic zone toward the transverse folding line T for a length of more than 25 mm, wherein 20 to 800 fourth elastic strands with a strand fineness of 40 to 300 deniers and a stretching ratio of more than 150% are sandwiched between the second inner non-woven fabric and the outer non-woven fabric in the fourth elastic zone, wherein the spacing between the fourth elastic strands is more than 0.5 mm; Wherein, in the rear region, the tensile force of the third elastic zone is higher than the tensile force of the fourth elastic zone.

3. The disposable pant-type absorbent product according to claim 1 or 2, characterized in that: It also includes a fifth elastic strand located in the first elastic zone, wherein 1 to 50 fifth elastic strands are sandwiched between the folded portion of the first inner non-woven fabric and the folded portion of the outer non-woven fabric, wherein the strand fineness of the fifth elastic strand is 40 to 300 deniers and the stretching ratio is greater than 150%, wherein the spacing between these fifth elastic strands is greater than 0.5 mm.

4. The disposable pant-type absorbent product according to claim 1 or 2, characterized in that: It also includes a sixth elastic strand located in the third elastic zone, wherein 1 to 50 sixth elastic strands are sandwiched between the folded portion of the second inner non-woven fabric and the folded portion of the outer non-woven fabric, wherein the strand fineness of the sixth elastic strand is 40 to 300 deniers and the stretching ratio is greater than 150%, wherein the spacing between these sixth elastic strands is greater than 0.5 mm.

5. The disposable pant-type absorbent article according to claim 2, wherein: The first inner layer non-woven fabric and the second inner layer non-woven fabric can be selected from hot air non-woven fabric, spunbond non-woven fabric, spunbond meltblown non-woven fabric or at least one of hot air / spunbond / spunbond meltblown non-woven fabric with pattern printing, wherein the material fiber fineness of the first inner layer non-woven fabric and the second inner layer non-woven fabric is 0.6 denier to 3.0 denier and the gram weight range of the non-woven fabric is 8 g / m2 to 32 g / m2.

6. The disposable pant-type absorbent article according to claim 2, wherein The outer layer nonwoven fabric can be selected from hot air nonwoven fabric, spunbond nonwoven fabric, spunbond meltblown nonwoven fabric or at least one of hot air / spunbond / spunbond meltblown nonwoven fabrics with pattern printing, wherein the diameter of the material fiber of the outer layer nonwoven fabric is 5 to 30 microns and its gram weight ranges from 10 grams / square meter to 35 grams / square meter.

7. The disposable pant-type absorbent product according to claim 1 or 2, characterized in that: The stretching ratio of the first elastic strands is 150% to 300%, and the spacing between the first elastic strands is 2 to 15 mm, or the stretching ratio of the second elastic strands is 150% to 350%, and the spacing between the second elastic strands is 0.5 to 2.5 mm.

8. The disposable pant-type absorbent article according to claim 2, wherein: The stretching ratio of the third elastic strands is 150% to 300%, and the spacing between these third elastic strands is 2 to 15 mm, or the stretching ratio of the fourth elastic strands is 150% to 350%, and the spacing between these fourth elastic strands is 0.5 to 2.5 mm.

9. The disposable pant-type absorbent product according to claim 1 or 2, characterized in that: It also includes a plurality of seventh elastic strands extending along the transverse direction and used to form leg cuffs or leg opening barriers, wherein the seventh elastic strands are sandwiched between the first inner layer nonwoven fabric and the outer layer nonwoven fabric.

10. The disposable pant-type absorbent article according to claim 2, wherein: The stretching force in the first and / or third elastic zone is generally 290 to 400 grams-force, and the stretching force in the second and / or fourth elastic zone is generally 235 to 285 grams-force.

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