Self-fitting disposable personal care absorbent article

Abstract

The utility model relates to a self-fitting disposable personal care absorbing product, which has a longitudinal direction, a transverse direction and a thickness direction which are vertical to one another, and is divided into a front area, a rear area and a crotch area between the front area and the rear area along the longitudinal direction. The absorbent article comprises: a liquid permeable surface layer for facing the body of a wearer; the liquid-tight back layer is opposite to the surface layer in the thickness direction and is used for facing clothes of a wearer; the absorption core layer is arranged between the surface layer and the back layer; at least one additional layer between the face layer and the absorbent core layer or between the absorbent core layer and the back layer; the elastic material is clamped between any two adjacent layers in the thickness direction and is combined with at least one of the two layers to form an elastic area at the combination position, and the elastic area is located at least one of the front area, the crotch area and the rear area; and the layer combined with the elastic material is discontinuously combined with another adjacent layer located on one side, back to the elastic material, of the layer in the thickness direction, a non-combination area and a combination area are formed between the two layers, and the non-combination area corresponds to the elastic area.

Description

TECHNICAL FIELD

[0001] The present utility model relates to absorbent hygiene products, in particular to a self-adhering disposable personal care absorbent article. BACKGROUND

[0002] Currently, sanitary napkins, panty liners, and paper diapers are used as personal hygiene products for absorbing bodily discharges, among which absorbency, comfort, and adhesion are three important attributes of such products and are also aspects that users pay more attention to. Generally, users are more interested in knowing whether such products are sufficient to absorb a large amount of bodily discharges and do not leak to soil the wearer's clothing or bed sheet, etc., and do not sacrifice the comfort of the product.

[0003] Researchers have found that for a variety of reasons, the current disposable absorbent products are not able to completely absorb bodily discharges, resulting in uncontrolled flow of bodily discharges from the periphery of the topsheet layer, especially the back and sides, and further leakage. These reasons include: the wearer constantly changing positions during work or exercise, maintaining a side-lying position for a long time during rest, a large amount of bodily discharges rushing to the topsheet layer in a short time, and the topsheet layer being specially chemically treated to reduce the wet and sticky feeling of the topsheet layer, resulting in the inability of the topsheet layer to quickly and widely conduct bodily discharges to the internal absorbent core, etc.

[0004] According to consumer tests, the current personal hygiene products cannot completely solve the leakage problem. Once the leakage pollutes the clothing, it will cause a very poor consumer experience. Therefore, there is a need in the art to further optimize the design of the leakage prevention performance of personal hygiene products, and it is expected that the optimized product can realize a skin-acceptable, long-lasting self-adaptive ability to improve the leakage prevention effect of the product. SUMMARY

[0005] The present utility model aims to provide a self-adhering disposable personal care absorbent article that can automatically adhere to the wearer's body, thereby improving the skin-adaptive performance and preventing leakage.

[0006] According to one aspect of the present application, a self-fitting disposable personal care absorbent article is provided, the absorbent article having a longitudinal direction and a transverse direction perpendicular to the longitudinal direction, and a thickness direction perpendicular to the longitudinal and transverse directions, and being divided into a front region, a back region, and a crotch region connected between the front region and the back region along the longitudinal direction, the absorbent article comprising: a liquid-permeable topsheet configured to face a wearer's body; a liquid-impermeable backsheet arranged opposite to the topsheet along the thickness direction and configured to face a wearer's clothing; an absorbent core layer arranged between the topsheet and the backsheet; at least one additional layer arranged between the topsheet and the absorbent core layer, or arranged between the absorbent core layer and the backsheet; an elastic material sandwiched between any two adjacent layers along the thickness direction among the above-mentioned layers and combined with at least one of the two layers to form an elastic region at the combined position, wherein the elastic region is located in at least one of the front region, the crotch region, and the back region; wherein the layer combined with the elastic material is also discontinuously combined with another adjacent layer located on the side of the layer away from the elastic material along the thickness direction, so as to form a non-combined region between the two layers and a combined region adjacent to the non-combined region, and the non-combined region corresponds to the elastic region.

[0007] According to the personal care absorbent article provided by the present application, an elastic material is added in the absorbent region, the elastic material is located between two layers of the absorbent article, and is combined with at least one of the two layers to form an elastic region. The two layers sandwiching the elastic material are discontinuously combined with the adjacent layer, especially the lower layer, wherein the non-combined region corresponds to the elastic region. In this way, the elastic region is retracted, the non-combined region is arched, the absorbent article is locally bent, and the absorbent article is automatically fitted to the wearer's body, especially the wearer's hip region. The present application can effectively improve the fit of the absorbent article and prevent leakage.

[0008] In some embodiments, the elastic region is located within the boundary of the non-combined region.

[0009] In some embodiments, the length of the non-combined region in the longitudinal direction is 1.01 to 10 times the length of the elastic region in the longitudinal direction.

[0010] In some embodiments, the width of the non-combined region in the transverse direction is 1.01 to 10 times the width of the elastic region in the transverse direction.

[0011] In some embodiments, the elastic material includes a first elastic material extending along the longitudinal direction, and a part of the first elastic material is combined with at least one of the two layers sandwiching it to form an elastic region at the combined position.

[0012] In some embodiments, the first elastic material is intermittently bonded to at least one of the two layers sandwiching it, thereby forming a plurality of bonds spaced apart in the longitudinal direction, and the elastic regions are formed by the bonds.

[0013] In some embodiments, the elastic material includes a second elastic material crossing the absorbent article in the transverse direction and intersecting the first elastic material, the first elastic material being bonded to at least one of the two layers sandwiching it at locations of avoidance of intersection, and the second elastic material being bonded to at least one of the two layers sandwiching it at locations of intersection, and the elastic regions are formed by the bonds.

[0014] In some embodiments, the second elastic material is configured to be arc-shaped with an apex of the arc projecting towards the back end edge of the absorbent article, and the bonds of the second elastic material are closer to the back end edge of the absorbent article than the bonds of the first elastic material.

[0015] In some embodiments, the elastic material includes a third elastic material and a fourth elastic material extending obliquely from the front region to the back region at an angle with respect to the longitudinal direction, wherein the third elastic material and the fourth elastic material are arranged in intersection, and are bonded to at least one of the two layers sandwiching them at locations of intersection, to form the elastic regions.

[0016] In some embodiments, the absorbent article further includes two side barrier structures arranged on opposite sides of the absorbent core layer in the transverse direction, each of the side barrier structures extending in the longitudinal direction, and the elastic material is located at the side barrier structures.

[0017] Some of the other features and advantages of the present application will become apparent from the specification, and from the claims, when they are read in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The embodiments of the present application will be described in detail below with reference to the drawings, in which:

[0019] Figure 1 is a schematic view of an absorbent article according to an embodiment of the present application in a flat state;

[0020] Figure 2A shows an absorbent article according to an embodiment of the present application, wherein the elastic material is arranged between the cover layer and the flow-directing layer;

[0021] Figure 2B shows an absorbent article according to an embodiment of the present application, wherein the elastic material is arranged between the flow-directing layer and the absorbent core layer;

[0022] Figure 2CAn absorbent article according to embodiments of the present application is shown, wherein the elastic material is arranged between the absorbent core layer and the back layer;

[0023] Figures 3A-3C An absorbent article according to embodiments of the present application is shown, wherein different positions of the elastic region;

[0024] Figure 4 An absorbent article according to embodiments of the present application is shown, wherein the first elastic material is joined to the cover layer and the flow control layer in one section;

[0025] Figure 5 An absorbent article according to embodiments of the present application is shown, wherein the position relationship between the elastic region and the absorbent core layer;

[0026] Figure 6 An absorbent article according to embodiments of the present application is shown, wherein the flow control layer and the underlying absorbent core layer are joined in an intermittent manner;

[0027] Figure 7 An absorbent article according to embodiments of the present application is shown, wherein the first elastic material is joined to the cover layer and the flow control layer in two sections in an intermittent manner;

[0028] Figure 8 An absorbent article according to embodiments of the present application is shown, wherein the first elastic material and the arc-shaped second elastic material are both joined to the cover layer and the flow control layer;

[0029] Figure 9 An absorbent article according to embodiments of the present application is shown, wherein the third elastic material and the fourth elastic material are arranged in an intersecting manner;

[0030] Figure 10 An absorbent article according to embodiments of the present application is shown, wherein the fifth elastic material at the side barrier structure is joined to the cover layer and the flow control layer;

[0031] Figure 11 An absorbent article according to embodiments of the present application is shown, wherein the flow control layer and the underlying absorbent core layer are joined in an intermittent manner.

[0032] BRIEF DESCRIPTION OF REFERENCE NUMERALS:

[0033] 1 - absorbent article; 100 - non-joined region; 110 - joined region; 2 - cover layer; 21 - middle portion;

[0034] 22 - side portion; 23 - side barrier structure; 3 - flow control layer; 31 - opening; 4 - absorbent core layer; 5 - back layer;

[0035] 6 - elastic material; 60 - elastic region; 61 - first elastic material; 611 - joined section; 6

[0036] 12 - unbound section; 62 - second elastic material; 621 - bound section; 622 - unbound section

[0037] 63 - third elastic material; 631 - bound section; 632 - unbound section; 64 - fourth

[0038] elastic material; 641 - bound section; 642 - unbound section; 65 - fifth elastic material; 6

[0039] 51 - bound section; 652 - unbound section; 7 - front region; 71 - front end edge; 72 - front side edge

[0040] 8 - crotch region; 81 - crotch side edge; 9 - back region; 91 - back end edge; 92 -

[0041] back side edge DETAILED DESCRIPTION

[0042] Referring now to the drawings, illustrative embodiments of the present disclosure are described in detail. Although the drawings represent some embodiments, the drawings are not necessarily to scale and certain features can be exaggerated, removed, or otherwise not portrayed in order to better illustrate and explain the present disclosure. The descriptions set forth herein of certain implementations do not limit the scope of the present disclosure to those implementations. The descriptions are intended to provide illustrative examples of the present disclosure.

[0043] Certain directional terms as used to describe the drawings, such as "inner," "outer," "above," "below," and other similar terms, are used in reference to the illustrations as they are presented. Unless otherwise noted, the directional terms as described in the present specification are intended to align with the orientations of the drawings as they are presented.

[0044] The terms "first," "second," "third," "fourth," and the like in the context of the present disclosure are used to distinguish one element from another, and do not necessarily indicate a specific order or sequence. The terms "first," "second," "third," "fourth," and the like are used herein, merely for purposes of description, and are not intended to limit the scope of the application.

[0045] Terminology

[0046] With respect to absorbent articles, "disposable" means that the absorbent articles are not generally intended to be washed or otherwise reconditioned or reused as absorbent articles (i.e., they are intended to be discarded after a single use, and preferably are recyclable, compostable, or otherwise disposed of in an environmentally compatible manner).

[0047] "Absorbent article" refers herein to an article that is intended to be placed against or in proximity to (i.e., adjacent to) the body of a wearer to absorb and contain various liquid, solid, and semi-solid exudates discharged from the body. Such absorbent articles as described herein are intended to be discarded after a limited period of use rather than being laundered or otherwise restored for reuse. It should be understood that the present disclosure applies to a variety of disposable absorbent articles, including but not limited to feminine hygiene products such as sanitary napkins, pantiliners, and the like.

[0048] As used herein, the terms "nonwoven" or "nonwovens" generally refer to a web having a structure of individual fibers or threads which is sandwiched, but not in a discernible manner as in a knitted fabric. Examples of suitable nonwoven or web include, but are not limited to, meltblown webs, spunbond webs, bonded-carded webs, airlaid webs, coform webs, hydroentangled webs, and the like.

[0049] As used herein, the term "meltblown web" generally refers to a nonwoven web that is prepared by a process in which molten thermoplastic material is extruded through a plurality of small, usually circular, capillary die orifices into a converging high velocity gas (e.g., air) stream, which attenuates the fibers of the molten thermoplastic material to reduce their diameter. Thereafter, the meltblown fibers are carried by the high velocity gas stream and deposited onto a collecting surface to form a web of randomly distributed meltblown fibers. Generally, the meltblown fibers can be continuous or non-continuous microfibers, usually less than 10 microns in diameter, and are generally tacky when deposited on the collecting surface.

[0050] As used herein, the term "spunbond web" generally refers to a web that contains substantially continuous fibers. The fibers are produced by extruding a molten thermoplastic material through a plurality of fine, usually circular, capillary die orifices as filaments, and then rapidly reducing the diameter of the extruded fibers, e.g., by drawing and / or other well-known spunbond mechanisms. "Proximal" and "distal" refer to the relative position of an element closer to or further from the longitudinal or lateral centerline of a structure, respectively (e.g., relative to the same longitudinal axis, the proximal edge of a longitudinally extending element is closer to the longitudinal axis than the distal edge of the same element).

[0051] "Body facing" and "garment facing" refer to the relative position of an element or the relative position of a surface of an element or group of elements. "Body facing" means that the element or surface is closer to the wearer during wear than some other element or surface. "Garment facing" means that the element or surface is further from the wearer during wear than some other element or surface (i.e., the element or surface is closer to the garment of the wearer, which can be worn over the disposable absorbent article).

[0052] As used herein, the term "extensible" or "extensibility" generally refers to the ability of a material to be elongated in the direction of the applied force, such as being elongated at least about 25%, or at least about 50%, or at least about 75% in the direction of the applied force from a naturally relaxed state. An extensible material need not necessarily have recovery properties or necessarily have significant recovery properties. For example, an elastic material is an extensible material that has recovery properties. A meltblown web can be extensible, but have significantly reduced recovery properties as compared to its extensibility, or even no recovery properties, and thus be an extensible inelastic material.

[0053] As used herein, the term "elastomeric" or "elastic" generally refers to a material that, by application of a stretching force, is stretched in at least one direction (such as the machine direction) and, by removal of the stretching force, contracts / reverts to approximately its original size. For example, a stretched material can have a stretched length that is at least about 50% longer than the unstretched length of its relaxed state, and, by removal of the stretching force, can recover to a length that is within at least 50% of its stretched length.

[0054] As used herein, the term "elastic material" includes an elongated material that has elasticity, such as, but not limited to, elastic rubber bands, elastic filaments, elastic ribbons, elastic films, elastic cloths (such as elastic fiber nonwoven sheets), and elastic composites, among others. Elastic rubber bands can be made, for example, in a spooling process from spandex.

[0055] As used herein, the term "joined" herein refers to the joining, adhering, connecting, attaching, or the like of two elements. Two elements will be considered joined together when they are directly or indirectly connected to one another, such as when connected through an intermediate connector element. Joining can be accomplished through various attaching means, including adhesives, soldering, welding, heat bonding, ultrasonic bonding, sewing, and / or crimping.

[0056] As used herein, the term "ultrasonic welding" refers to a process performed, for example, by passing a material through a slot between an ultrasonic generator and a backing roller.

[0057] Disposable personal care absorbent article

[0058] The present disclosure relates to a self-fitting disposable absorbent article, which can be a feminine personal care sanitary article such as a sanitary napkin or a panty liner. The disposable absorbent article is provided with elastic material in the product absorbent region, and the elastic material is sandwiched between two layers of the article and locally bonded to one or both of the two layers to form an elastic region. One of the two layers (e.g. the layer on the lower side in the thickness direction) is intermittently bonded to the adjacent layer, and the unbonded region is aligned with the elastic region. In this way, the elastic material is retracted, and the unbonded region is naturally arched, resulting in a local curvature of the absorbent article and achieving automatic fitting of the product to the wearer's body. The self-fitting design can effectively improve the fit of the product and prevent leakage. At the same time, the disposable absorbent article of the present disclosure can be particularly adapted to existing absorbent article production processes, and has good economic benefits.

[0059] Figure 1 An embodiment of a self-fitting disposable personal care absorbent article 1 (hereinafter referred to as "absorbent article") according to the present disclosure is exemplarily shown as a sanitary napkin. As shown, the absorbent article 1 is shown in a laid flat configuration and assumes a naturally relaxed state without deformation or wrinkles caused by external forces. The absorbent article 1 has a longitudinal direction MD (or referred to as "machine direction") and a transverse direction CD (or referred to as "cross-machine direction") perpendicular to each other, and a thickness direction H (shown in Figures 2A-2C Figure 1 The longitudinal center line X is also marked in

[0060] In the longitudinal direction MD, the absorbent article 1 can be divided into a front region 7, a crotch region 8, and a back region 9, wherein the crotch region 8 is connected between the front region 7 and the back region 9. The front region 7 has front side edges 72 on opposite sides in the transverse direction CD, and a front end edge 71 extending between the two front side edges 72 in the transverse direction CD. The back region 9 has back side edges 92 on opposite sides in the transverse direction CD, and a back end edge 91 extending between the two back side edges 92 in the transverse direction CD. The crotch region 8 has crotch side edges 81 on opposite sides in the transverse direction CD, respectively. The front end edge 71 and the back end edge 91 substantially define the two ends of the absorbent article 1 in the longitudinal direction MD. It can be understood that the side edges and end edges of the front region 7, the crotch region 8, and the back region 9 do not necessarily have to be in a straight edge configuration, but can be designed as an arc configuration as needed, or even the same side edge or end edge can be connected by multiple curves with different radii, as shown in Figure 1 In addition, the crotch side edges 81 can be formed with protruding wings to facilitate the fixation of the absorbent article 1 to the wearer's clothing. Generally, the back region 9 has a greater transverse width than the front region 7 and the crotch region 8 to form a large tail wing configuration.

[0061] Figure 2A ​A schematic cross-sectional view of the absorbent article 1 is shown in a plane perpendicular to the MD-CD plane, or in other words, from the thickness direction H. As shown, in the thickness direction H, the absorbent article 1 comprises a topsheet 2 and a backsheet 5 opposite to each other, and arranged between the topsheet 2 and the backsheet 5 are an absorbent core 4 and a fluid transfer layer 3.

[0062] The topsheet 2 can be a single layer or a multi-layer laminate defining a surface that directly contacts the wearer's skin and is hydrophilic to function to receive and direct body exudates toward the absorbent core 4. The topsheet 2 is preferably configured to retain little or no liquid in its structure, thereby providing a relatively comfortable and non-irritating feel next to the wearer's skin. In various embodiments, the topsheet 2 can be a single layer structure or a multi-layer composite structure, and the multi-layer composite structure itself can comprise similar or different materials. The topsheet 2 can be constructed from various nonwoven webs such as meltblown webs, spunbond webs, hydroentangled webs, or air-through bonded carded webs. Examples of suitable topsheet materials can include, but are not limited to, natural fiber webs (such as cotton), rayon, hydroentangled webs, bonded carded webs of 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. Apertured films and web materials can also be used, as well as laminates or combinations of these materials.

[0063] In addition, the topsheet 2 can be divided into a central portion 21 and side portions 22 located on opposite sides of the central portion 21, as viewed in the transverse CD direction. The central portion 21 is the area that directly contacts the body exudates, and can occupy a relatively large area of the topsheet 2. In one possible way, the central portion 21 of the topsheet 2 is configured to have a three-dimensional textured surface, for example, the central portion 21 of the topsheet 2 is made of a three-dimensional composite material comprising a plurality of convex points and a plurality of concave points arranged alternately. Alternatively, the material of the central portion 21 can be surface treated to have a good fluid transfer effect toward the absorbent core 4, preventing the body exudates from staying on the topsheet 2 for a long time. The side portions 22 can be distinguished from the central portion 21 by means of a significant or insignificant boundary. For example, a three-dimensional containment barrier extending in the longitudinal MD direction can be arranged at the junction of the side portions 22 and the central portion 21.

[0064] The backsheet 5 is generally liquid impermeable and is the portion of the absorbent article 1 that faces the wearer's clothing. The backsheet 5 can be configured to allow the passage of gases from the absorbent article 1 but to prevent the passage of liquids. Any liquid impermeable material can generally be used to form the backsheet 5. The liquid impermeable backsheet can be comprised of a single layer or multiple layers, and the single layer or multiple layers can themselves comprise similar or different materials. Suitable materials that can be used can be microporous polymeric films, such as polyolefin films of polyethylene or polypropylene, nonwovens and nonwoven laminates and film / nonwoven laminates. The particular structure and composition of the backsheet can be selected from a variety of known films and / or fabrics, with particular materials being suitably selected to provide the desired level of liquid barrier, strength, abrasion resistance, tactile properties, aesthetics, etc.

[0065] The topsheet 2 and the backsheet 5 can be joined together along their perimeters to form a seal, thereby encasing the absorbent core 4 therebetween and trapping bodily exudates that penetrate therethrough from the topsheet layer. The absorbent core 4 is generally disposed primarily in the crotch region 8, but can extend into the front region 7 at one end and into the back region 9 at the other end. The absorbent core 4 can be a composite of layered liquid absorbent raw materials that can exhibit some degree of stretchability and comfort, be non-irritating to the wearer's skin, and be capable of absorbing and retaining bodily exudates. The absorbent core 4 can be made of any suitable material and can contain any number of desired layers. For example, in one embodiment, the absorbent core 4 can include outermost topsheet and backsheet layers, with a core support layer and an absorbent material layer disposed therebetween. The topsheet and backsheet layers can be made of the same material, or the topsheet and backsheet layers can be configured to have different absorbent properties. For example, the topsheet and backsheet layers can both be made of a liquid permeable nonwoven sheet. The core support layer can be made of, for example, a thermally-bonded nonwoven sheet, and can be a single layer or a multi-layer laminate structure. The absorbent material layer can be made of any suitable absorbent material, such as superabsorbent polymer (SAP). SAP shall mean a polymer that absorbs and retains a very large amount of liquid relative to its own mass. Cross-linkable water-absorbing polymers, which are classified as hydrogels, absorb aqueous solutions by hydrogen bonding and other polar forces with water molecules. The water-absorbing capacity of SAP is based in part on the ionicity (an index of the ionic concentration of the aqueous solution) and the polar functionality of the SAP that has a water affinity. SAP is generally manufactured by polymerizing acrylic acid with sodium hydroxide, with an initiator, to form a sodium polyacrylate salt (sometimes referred to as sodium polyacrylate). Other materials can also be used to manufacture superabsorbent polymers, such as polyacrylamide copolymers, ethylene maleic anhydride copolymers, cross-linked carboxymethylcellulose, polyvinyl alcohol copolymers, cross-linked polyethylene oxide, and starch graft copolymers of polyacrylonitrile. SAP can be present in the absorbent article in particulate or fibrous form.

[0066] In addition to the topsheet 2, the backsheet 5 and the absorbent core 4, other functional additional layers such as a support layer, a surge management layer, a distribution layer, etc. can be provided for the absorbent article 1. These functional additional layers can be arranged between the topsheet and the absorbent core, or between the absorbent core and the backsheet, as desired. Figure 2A A distribution layer 3 is shown between the topsheet 2 and the absorbent core 4. The distribution layer 3 helps to quickly direct the bodily exudates, especially liquids, absorbed by the topsheet 2 to the absorbent core 4 and distribute the bodily exudates across the entire area of the absorbent core to maximize the utilization of the absorbent core and prevent the bodily exudates from accumulating in a localized area of the absorbent core and causing a reduction in the absorbent capacity. The distribution layer 3 can also function as an intermediate storage layer before the bodily exudates are absorbed by the absorbent core and as a barrier to prevent backflow. The distribution layer 3 has a width in the transverse CD that is less than the width of the topsheet 2 in the transverse CD. In one example, the transverse width of the distribution layer 3 is substantially the same as the transverse width of the middle portion 21 of the topsheet 2. In addition, the distribution layer 3 can be constructed with structures to help direct the bodily exudates, such as the openings 31 shown in the figure that are aligned with the absorbent core 4. Fibrous nonwovens such as spunbond webs, meltblown webs, carded webs such as air-laid webs, bonded carded webs and coform materials are suitable for making the distribution layer 3. Alternatively, foam materials and scrim materials are also very suitable. In addition, the distribution layer 3 can be a multi-layer structure.

[0067] An elastic material 6 is also arranged in the absorbent article 1. The elastic material 6 is advantageously designed for comfort and fit and functions to prevent leakage. The elastic material 6 can be sandwiched between any two adjacent layers in the absorbent article 1, such as Figure 2A between the topsheet 2 and the distribution layer 3 as shown, or Figure 2B between the distribution layer 3 and the absorbent core 4 as shown, or Figure 2C between the absorbent core 4 and the backsheet 5 as shown. The elastic material can be an elastic string, an elastic filament, an elastic cloth, an elastic film, an elastic composite, or a combination thereof. The elastic filament can have a gauge in the range of, for example, 50D-1000D. The elastic cloth can have a basis weight in the range of, for example, 10gsm-300gsm. The elastic film can have a basis weight in the range of, for example, 10gsm-100gsm. The elastic composite can have a basis weight in the range of, for example, 10gsm-300gsm.

[0068] In securing the elastic material 6 between the two adjacent layers above and below, an adhesive can be applied to the surface of the elastic material 6, and then the elastic material 6 can be placed on the lower of the two layers, with the upper layer covering the elastic material 6 and the lower layer. Alternatively, the adhesive can be applied to either of the two adjacent layers above and below, and then the elastic material 6 and the other layer can be placed. Of course, the elastic material can be bonded to only one of the two adjacent layers above and below (such as to the lower of the two adjacent layers above and below), and left un-bonded to the other of the two adjacent layers above and below.

[0069] The length of the elastic material can be set as desired, and can range from 1% to 100% of the overall longitudinal length of the absorbent article 1, such as 60%, 70%, 80%, or 90%. After the elastic material 6 is bonded to at least one of the upper and lower layers by the adhesive, the contraction of the elastic material 6 in the location where the adhesive is present will cause the bonded layer to contract as well, thereby forming an effective elastic region (hereinafter referred to as an “elastic region”). If the elastic material 6 is bonded to at least one of the upper and lower layers in an intermittent manner, i.e., by applying the adhesive intermittently, such that one or more spaced-apart sections of the elastic material 6 are bonded to at least one of the upper and lower layers, while other sections are free to contract relative to the layer, the elastic region is formed in the location of the one or more bonded sections of the elastic material 6. The elastic region can occupy 1% to 100% of the overall longitudinal length of the absorbent article 1, such as 60%. The starting end of the elastic region that is proximate to the front end edge 71 of the absorbent article 1 can be 1% to 100% of the overall longitudinal dimension of the absorbent article 1, such as 50%, 60%, or 70%, from the back end edge 92 of the absorbent article 1.

[0070] The elastic region can be formed at any suitable location of the absorbent article 1, such as Figure 3A An elastic region 60 formed in the front region 7 of the absorbent article 1 is shown, Figure 3B An elastic region 60 formed in the crotch region 8 of the absorbent article 1 is shown, and Figure 3C An elastic region 60 formed in the back region 9 of the absorbent article 1 is shown.

[0071] As described above, the elastic material 6 is sandwiched between any suitable two adjacent layers of the absorbent article 1, while another layer adjacent to the two layers, such as the next adjacent layer, can be bonded to the two layers by applying the adhesive intermittently, where the location where the adhesive is present forms a bonded region, and the location where the adhesive is absent forms an unbonded region. In the scheme of the present disclosure, the unbonded region corresponds to the elastic region located thereabove, such that when the elastic region naturally retracts, the unbonded region is caused to freely arch, forming a curved configuration that conforms to the body curve, effectively improving the leakage prevention capability of the product, and having good breathability. Advantageously, the area of the unbonded region is greater than the area of the elastic region. For example, the longitudinal MD length of the unbonded region is 1.01 to 10 times the longitudinal MD length of the elastic region, and the lateral CD width of the unbonded region is 1.01 to 10 times the lateral CD width of the elastic region.

[0072] The elastic region can be located within the boundary of the non-bonded region and spaced apart from the boundary of the non-bonded region so as not to coincide with the non-bonded region. This is more conducive to the natural arching of the non-bonded region and the self-adjustment relative to the wearer's skin, preventing the non-bonded region from pressing too hard against the wearer's skin.

[0073] The self-adapting absorbent article 1 of the present disclosure will be described in detail below with specific examples.

[0074] Figure 4 An embodiment of the absorbent article 1 is shown, in which the longitudinal MD length of the absorbent article 1 is 420 mm, and the first elastic material 61 is fixed between the topsheet 2 and the flow conductor 3. The first elastic material 61 is selected as a single rubber band with a denier of 50D-1000D. There are 1-30 rubber bands. The length of the rubber band is the same as the longitudinal length of the absorbent article 1, and extends along the longitudinal MD from the front edge 71 to the back edge 91 of the absorbent article 1, and is arranged with a lateral spacing of 1 mm-20 mm. The two ends of the rubber band can be fixed in the bonding periphery between the topsheet 2 and the backsheet 5, respectively. A section of the rubber band is applied with adhesive, thereby forming a bonded section 611 (shown in solid line in the figure) bonded together with the topsheet 2 and the flow conductor 3, and a non-bonded section 612 (shown in dashed line in the figure) free to contract relative to the topsheet 2 and the flow conductor 3, wherein the bonded section 611 forms the elastic region 60.

[0075] Further reference is made to Figure 5 , which is also this embodiment, showing the relative position of the absorbent core layer 4 and the elastic region 60 (or the bonded section of the rubber band). As shown, the absorbent core layer 4 avoids the bonded section of the rubber band in the longitudinal MD, and is closer to the front edge 71 of the absorbent article 1 relative to the bonded section of the rubber band. This can prevent the elastic region 60 from forcing the absorbent core layer 4 to deform and affect the absorbent capacity of the absorbent core layer 4. Advantageously, the bonded section of the rubber band can be immediately adjacent to the absorbent core layer 4 in the longitudinal MD, or in other words, the terminal position of the absorbent core layer 4 close to the back edge 91 is also about the starting position of the bonded section of the rubber band. In the embodiment shown, the longitudinal distance between the starting end of the bonded section of the rubber band and the back edge 91 of the absorbent article 1 is 100 mm-300 mm, and the longitudinal length of the elastic region is 1 mm-200 mm.

[0076] Next reference is made to Figure 6In this embodiment, the first elastic material 61 is applied between the topsheet 2 and the acquisition layer 4, and the first elastic material 61 is discontinuously applied with adhesive to form the elastic regions 60 and the non-elastic regions 70, wherein the non-elastic regions 70 are surrounded by the elastic regions 60. The non-elastic regions 70 correspond to the elastic regions 60 formed by the first elastic material 61 between the topsheet 2 and the acquisition layer 4, and the length of the non-elastic regions 70 in the longitudinal direction MD is 1 mm to 100 mm, and the width of the non-elastic regions 70 in the transverse direction CD is 1 mm to 100 mm. The non-elastic regions 70 are naturally arched due to the contraction of the elastic regions 60 above.

[0077] Figure 7 In another embodiment of the absorbent article 1, the elastic material is applied in a double-bonding design. As shown in the figure, the length of the absorbent article 1 in the longitudinal direction MD is 420 mm, and the first elastic material 61 is fixed between the topsheet 2 and the acquisition layer 4. The first elastic material 61 is selected from a single rubber band with a denier of 50D to 1000D. The number of rubber bands is 1 to 30. The length of the rubber band is the same as the longitudinal length of the absorbent article 1, and the rubber band extends from the front edge 71 to the back edge 91 of the absorbent article 1 in the longitudinal direction MD with a transverse spacing of 1 to 20 mm. The two ends of the rubber band can be fixed in the bonding periphery between the topsheet 2 and the backsheet 5, respectively. The rubber band is discontinuously applied with adhesive at two sections, thereby forming two bonding sections 611 (shown in solid lines in the figure) arranged at intervals in the longitudinal direction MD, and non-bonding sections 612 (shown in dashed lines in the figure) that are free to contract relative to the topsheet 2 and the acquisition layer 4, wherein a non-bonding section 612 of one section is connected between two bonding sections 611. The two bonding sections 611 form the elastic regions 60. In the embodiment shown, one bonding section 611 of the rubber band near the front edge 71 is the first bonding section, and the other bonding section 611 near the back edge 91 is the second bonding section, and the longitudinal distance between the starting end of the first bonding section 611 near the front edge 71 of the absorbent article 1 and the back edge 91 of the absorbent article 1 is 50 mm to 300 mm, and the longitudinal length of the first bonding section 611 is 1 mm to 200 mm. The distance between the first bonding section and the second bonding section is 1 mm to 100 mm, and the longitudinal length of the second bonding section is 1 mm to 100 mm. The non-bonding sections 612 naturally contract, and the elastic regions formed by the two bonding sections 611 contract to form double-bonding.

[0078] Similar to the previous embodiment, in this embodiment, the flow control layer 3 and the absorbent core layer 4 are constructed with discontinuous web adhesive to form the bonded regions 110 and the unbonded regions 100, wherein the unbonded regions 100 correspond to the elastic regions formed by the elastics between the topsheet 2 and the flow control layer 3. The length of the unbonded regions along the longitudinal direction MD is in the range of 1 mm to 100 mm, and the width of the unbonded regions along the transverse direction CD is in the range of 1 mm to 100 mm. The relative position of the absorbent core layer 4 to the elastic regions can be arranged as in the previous embodiment.

[0079] Figure 8 Another embodiment of double-bonded elastic materials is shown. The majority of the dimensions and configurations of the absorbent article 1 of this embodiment can be referenced to those of the embodiment shown in Figure 7 The absorbent article 1 of the embodiment shown is designed differently in that, in addition to the first elastic material 61 extending along the longitudinal direction MD, a second elastic material 62 is added, which extends across the opposite sides of the absorbent article 1 in the transverse direction, for example, in the bonded periphery between the topsheet 2 and the backsheet 5 at both ends. The second elastic material 62 is arc-shaped, with the arc apex facing the back end edge 91 of the absorbent article 1. The second elastic material 62 can be selected from 1 to 30 elastics, each having a denier in the range of 50D to 1000D. In the longitudinal direction MD, the second elastic material 62 can have a spacing in the range of 1 mm to 20 mm.

[0080] The first elastic material 61 is applied with adhesive at one section to form a bonded section 611 (shown in solid line in the figure) that is bonded to the topsheet 2 and the flow control layer 3, and an unbonded section 612 (shown in dashed line in the figure) that is free to contract relative to the topsheet 2 and the flow control layer 3. The second elastic material 62 is applied with adhesive at one section of the arc shape to form a bonded section 621 (shown in solid line in the figure) that is bonded to the topsheet 2 and the flow control layer 3, and an unbonded section 622 (shown in dashed line in the figure) that is free to contract relative to the topsheet 2 and the flow control layer 3. Advantageously, the second elastic material 62 can be applied with adhesive at the section that intersects the first elastic material 61 to form the arc-shaped bonded section 621. In addition, the two ends of the bonded section 621 can be aligned with the transverse sides of the flow control layer 3.

[0081] The bonded section 611 of the first elastic material 61 is closer to the front end edge 71 of the absorbent article 1 than the bonded section 621 of the second elastic material 62, and the longitudinal spacing between the bonded section 611 and the bonded section 621 can be in the range of 1 mm to 100 mm. The longitudinal length of the elastic region composed of the bonded section 611 of the first elastic material and the bonded section 621 of the second elastic material 62 can be in the range of 1 mm to 100 mm.

[0082] Similar to the previous embodiments, in this embodiment, the flow control layer 3 and the absorbent core layer 4 are configured with discontinuous web adhesive to form the bonded regions 110 and the unbonded regions 100, wherein the unbonded regions 100 correspond to the elastic regions composed of the bonded segments 611 of the first elastic material 61 and the bonded segments 621 of the second elastic material 62 between the topsheet 2 and the flow control layer 3. The unbonded regions have a length in the longitudinal direction MD of 1 mm to 100 mm and a width in the transverse direction CD of 1 mm to 100 mm. The relative position of the absorbent core layer 4 to the elastic regions can be arranged as in the previous embodiment.

[0083] Figure 9 Another embodiment of the absorbent article 1 is shown, wherein most of the dimensions and configurations of the absorbent article 1 can be referred to the previous embodiments. Figure 4 The absorbent article 1 design of the shown embodiment differs in that the first elastic material 61 is replaced by a third elastic material 63 and a fourth elastic material 64 between the topsheet 2 and the flow control layer 3. The third elastic material 63 and the fourth elastic material 64 each extend obliquely with respect to the longitudinal direction MD and the transverse direction CD of the absorbent article 1 and can be arranged symmetrically with respect to the longitudinal centerline X of the absorbent article 1, such that the third elastic material 63 and the fourth elastic material 64 can cross near the longitudinal centerline X. The third elastic material 63 is bonded to the topsheet 2 and the flow control layer 3 at the crossing to form bonded segments 631 and unbonded segments 632, while the fourth elastic material 64 is bonded to the topsheet 2 and the flow control layer 3 at the crossing to form bonded segments 641 and unbonded segments 642. The bonded segments 631 of the third elastic material 63 and the bonded segments 641 of the fourth elastic material 64 form the elastic regions.

[0084] Figure 10 Another embodiment of the absorbent article 1 is shown, wherein most of the dimensions and configurations of the absorbent article 1 can be referred to the previous embodiments. Figure 4The absorbent article 1 of the illustrated embodiment is designed differently in that the absorbent article 1 further comprises two side barrier structures 23, or also called three-dimensional containment flaps, arranged at opposite sides in the transverse direction. Each side barrier structure 23 extends in the longitudinal direction MD. The two side barrier structures 23 are located at opposite sides of the absorbent core layer 4 in the transverse direction and optionally do not overlap the absorbent core layer 4 in the transverse direction. The side barrier structures 23 are visible from the topsheet 2 or are formed by a part of the topsheet 2, such as the side portions 22. A fifth elastic material 65 extending in the longitudinal direction MD is arranged at the side barrier structures 23. In this embodiment, the fifth elastic material 65 is sandwiched between the topsheet 2 and the acquisition layer 3. The fifth elastic material 65 can optionally be a single rubber string having a denier of 50D-1000D. 1-10 rubber strings are arranged at each side barrier structure 23, and the rubber strings are spaced apart by 1mm-20mm. The rubber strings can be as long as the longitudinal length of the absorbent article 1 and extend in the longitudinal direction MD from the front end edge 71 to the back end edge 91 of the absorbent article 1. The two ends of the rubber string can be fixed in the bonding periphery between the topsheet 2 and the backsheet 5, respectively. A section of the rubber string is applied with adhesive, thereby forming a bonded section 651 (shown in solid line in the figure) bonded together with the topsheet 2 and the acquisition layer 3 and a non-bonded section 652 (shown in dashed line in the figure) free to contract relative to the topsheet 2 and the acquisition layer 3, wherein the bonded section 651 forms an elastic region 60. The elastic region 60 is located 1mm-200mm away from the front end edge 71 of the absorbent article 1, and the longitudinal length of the elastic region is between 1mm and 420mm.

[0085] Next, reference is made to Figure 11 , which is also this embodiment, showing that the acquisition layer 3 is bonded with the next layer adjacent thereto, the absorbent core layer 4, using a large-area adhesive, and that a non-bonded region 100 and a bonded region 110 are formed by intermittent application of adhesive, wherein the bonded region 110 surrounds the non-bonded region 100. The non-bonded region 100 corresponds to the elastic region formed by the fifth elastic material 65 between the topsheet 2 and the acquisition layer 3, and the length of the non-bonded region in the longitudinal direction MD is between 1.01 times and 10 times the length of the elastic region, and the width in the transverse direction CD is between 1.01 times and 10 times the width of the elastic region. For example, the length of the non-bonded region in the longitudinal direction MD is 1mm-100mm, and the width in the transverse direction CD is 1mm-100mm. The non-bonded region naturally arches under the influence of the contraction of the elastic region above.

[0086] The inventor has found through comparative tests that by intermittently bonding the elastic material between the two layers adjacent above and below in the absorbent article and intermittently applying adhesive between the two layers adjacent below, the elastic region and the non-bonded region are stacked above and below, which can significantly improve the ability of the absorbent article (especially the back region) to conform to the body curve, reduce the occurrence of leakage, and effectively improve the air permeability of the absorbent article.

[0087] It should be understood that although the present specification is described in terms of various embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0088] The above merely illustrates the specific implementation of the present application, and is not intended to limit the scope of the present application. Any equivalent changes, modifications and combinations made by those skilled in the art without departing from the concept and principles of the present application shall fall within the scope of the present application.

Claims

1. A self-attaching disposable personal care absorbent article having a longitudinal direction and a transverse direction perpendicular thereto, and a thickness direction perpendicular to the longitudinal and transverse directions, and divided into a front region, a back region and a crotch region connected between the front and back regions along the longitudinal direction, characterized in that, The absorbent article comprises: a liquid-permeable topsheet configured to face a wearer's body; a liquid-impermeable backsheet disposed opposite the topsheet in the thickness direction and configured to face a wearer's clothing; an absorbent core layer disposed between the topsheet and the backsheet; at least one additional layer disposed between the topsheet and the absorbent core layer, or between the absorbent core layer and the backsheet; an elastic material sandwiched between and bonded to at least one of any two adjacent layers in the thickness direction to form an elastic region at the bond; wherein the layer to which the elastic material is bonded is also intermittently bonded to an adjacent other layer on the side of the layer opposite the elastic material in the thickness direction, thereby forming a non-bonded region between the two layers and a bonded region adjacent to the non-bonded region, and the non-bonded region corresponds to the elastic region.

2. The self-charging disposable personal care absorbent article of claim 1, wherein, The elastic region is located within the boundary of the non-bonded region.

3. The self-charging disposable personal care absorbent article of claim 2, wherein, The length of the non-bonded region in the longitudinal direction is 1.01 to 10 times the length of the elastic region in the longitudinal direction.

4. The self-charging disposable personal care absorbent article of claim 2, wherein, The width of the non-bonded region in the transverse direction is 1.01 to 10 times the width of the elastic region in the transverse direction.

5. The self-charging disposable personal care absorbent article of claim 1, wherein, The elastic material includes a first elastic material extending in the longitudinal direction, and a portion of the first elastic material is bonded to at least one of the two layers sandwiching it to form an elastic region at the bond.

6. The self-charging disposable personal care absorbent article of claim 5, wherein, The first elastic material is intermittently bonded to at least one of the two layers sandwiching it, thereby forming a plurality of bonds spaced apart in the longitudinal direction, and the elastic region is formed by the bonds.

7. The self-charging disposable personal care absorbent article of claim 5, wherein, The elastic material includes a second elastic material extending across the absorbent article in the transverse direction and intersecting the first elastic material, the first elastic material being bonded to at least one of the two layers sandwiching it at locations avoiding the intersection, and the second elastic material being bonded to at least one of the two layers sandwiching it at the intersection, and the elastic region is formed by the bonds.

8. The self-charging disposable personal care absorbent article of claim 7, wherein, The second elastic material is configured to protrude in an arc shape with the arc apex facing toward the back end edge of the absorbent article, and the bonds of the second elastic material are closer to the back end edge of the absorbent article than the bonds of the first elastic material.

9. The self-charging disposable personal care absorbent article of claim 1, wherein, The elastic material includes a third elastic material and a fourth elastic material extending obliquely from the front region to the back region at an angle with respect to the longitudinal direction, wherein the third elastic material and the fourth elastic material are arranged to intersect each other and are bonded to at least one of the two layers sandwiching them at the intersection to form an elastic region.

10. The self-charging disposable personal care absorbent article of claim 1, wherein, The absorbent article further comprises two side barrier structures arranged on opposite sides of the absorbent core layer in the transverse direction, each extending in the longitudinal direction, and the elastic material is located at the side barrier structures.

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