Individually packaged absorbent pads

Abstract

To provide an individual package of an absorbent pad preventing fingers from touching a product surface when wearing the pad.SOLUTION: An absorbent-pad individual package 1 comprises an absorbent pad 50 including a liquid permeable top sheet 10, a liquid impermeable back sheet 30, and an absorber 20 located therebetween; and an individual package sheet 70 disposed on a non-skin side of the absorbent pad 50. The absorbent pad 50 is divided into a front area 51, a fold area 52, and a rear area 53, and includes first and second release sheets 61 and 62 disposed apart from each other between the absorbent pad 50 and the individual package sheet 70 and respectively releasably bonded to the front area 51 and the rear area 53 of the back sheet 30. The individual package sheet 70 has a sheet body part and a sheet extension part. The first release sheet 61 is non-releasably bonded to the sheet extension part and is not bonded to the sheet body part, while the second release sheet 62 is non-releasably bonded to the sheet body part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an individually packaged absorbent pad. [Background technology]

[0002] Absorbent pads, such as light incontinence products, light incontinence liners, and urine absorption pads, were developed to address unexpected urinary leakage and the like, and have recently become widely used because they quickly absorb body fluids such as urine and are less likely to be noticed by others when they are worn. Absorbent pads are usually sold commercially as individually packaged products wrapped in packaging material. Various packaging structures have been proposed for individually packaged absorbent pads, for example, from the viewpoint of ease of removal from the inside of the absorbent pad.

[0003] Patent Document 1 describes a packaging structure for absorbent articles, in which absorbent articles are individually packaged in rectangular packaging material that can be opened from one longitudinal edge of the packaging material, and fastening tapes are fastened to the surfaces of the packaging material on both sides of the one edge, one end of the fastening tape is fixed to the surface of the packaging material on the one edge side, and the other end is detachably fastened to the surface of the other packaging material, and the fastening tape has a peel strength to the packaging material of 40 to 100 gf / 10 mm and a peel strength to the packaging material of 20 to 100 gf / 10 mm after being peeled from the packaging material and reattached to the packaging material after being peeled from the packaging material (Claim 1). Patent Document 1 also describes that the packaging material is easy to open without tearing when opened, and that the fastening tape used here can be repeatedly adhered to the packaging material, resulting in excellent sealing properties of the packaging structure when the absorbent article is disposed of after use (paragraph 0034). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 9-220254 Summary of the Invention [Problem to be solved by the invention]

[0005] More specifically, Patent Document 1 discloses a packaging structure using an absorbent pad and a packaging material that is in contact with the non-skin-facing surface of the absorbent pad, in which the absorbent pad is folded in thirds together with the packaging material so as to divide the absorbent pad into approximately three equal parts in the longitudinal direction, and both widthwise edge portions and one longitudinal edge portion of the packaging material are heat-sealed to individually package the absorbent pad. This type of packaging structure for absorbent pads is designed so that, when opened, the absorbent pad can be removed by peeling back the heat-sealed portion starting from the tab tape. This packaging structure is simple, easy for the wearer to use, and highly practical, and is therefore widely used in a variety of commercially available products.

[0006] However, with a typical individually packaged absorbent pad, for example, when the absorbent pad is separated from the packaging structure and placed in the crotch area of ​​underwear, it is unavoidable that the surfaces of the wearer's fingers will come into contact with the top sheet, which is the skin-facing surface of the absorbent pad. In everyday life, the wearer's fingers are not always hygienic, and there may be concerns about unsanitary conditions, particularly when replacing the absorbent pad.

[0007] An object of the present invention is to provide an individually packaged absorbent pad that prevents the user's fingers from touching the surface of the top sheet of the product when worn. [Means for solving the problem]

[0008]

[0006] As a result of extensive research to solve the above problems, the inventors have succeeded in obtaining an individual package using an absorbent pad and an individual package sheet that is larger than the absorbent pad in both the longitudinal and transverse directions, with two release sheets divided longitudinally between them, the release sheets being removable from the absorbent pad but non-removable from the individual package sheet, which are then superimposed in this order and folded with the absorbent pad facing inward; they have found that with this individual package, when the outermost individual package sheet is peeled away, the adhesive layer on the non-skin-facing surface of the absorbent pad (back sheet) is exposed with the top sheet facing inward, and therefore the individual package can be worn in underwear without touching the top sheet, leading to the completion of the present invention. That is, the present invention provides the following individually packaged absorbent pad.

[0009] (1) An individually packaged absorbent pad comprising an absorbent pad having a longitudinal direction corresponding to the front-to-back direction of a wearer, the absorbent pad including a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body positioned therebetween, and an individually packaged sheet disposed on the non-skin side of the absorbent pad, The absorbent pad is divided into a front region, a folded region, and a rear region, which are connected in this order in the longitudinal direction; The device further includes a first release sheet and a second release sheet that are disposed between the absorbent pad and the individual wrapping sheet and are spaced apart from each other in the longitudinal direction, the first release sheet is releasably adhered to the outer surface of the front region of the backsheet; the second release sheet is releasably adhered to the outer surface of the rear region of the backsheet; The individual packaging sheet has a sheet main body portion and a sheet extension portion extending from the sheet main body portion toward the rear region, the sheet main body portion has one end located near the outer surface of the first release sheet, and covers the outer surfaces of the folded portion and the second release sheet; the sheet extension portion covers the opposing front and rear ends of the folded absorbent pad, and the other end of the sheet extension portion is located on the outer surface of one end of the sheet main body portion; the first release sheet is non-releasably bonded to the sheet extension portion and is not bonded to the sheet main body portion; The individually packaged absorbent pad, wherein the second release sheet is non-releasably bonded to the main sheet portion. (2) The individually packaged absorbent pad of (1) above, wherein an opening indicator is provided at the other end of the sheet extension portion. (3) The individually packaged absorbent pad according to (2) above, wherein the opening indicator is a printed portion or an uneven portion. (4) An individually packaged absorbent pad according to any one of (1) to (4) above, wherein the absorbent pad is folded in half along the fold. (5) An individually packaged absorbent pad of any one of (1) to (4) above, wherein the front region of the absorbent pad is one of the ventral and dorsal sides of the wearer when the pad is in use, and the rear region of the absorbent pad is the other of the ventral and dorsal sides of the wearer when the pad is in use. (6) An absorbent pad packaging body according to any one of (1) to (5) above, wherein the other end of the first release sheet and the one end of the second release sheet are extended from each other to form a single continuous release sheet, and the release sheet covers the opposing front and rear ends of the absorbent pad when folded. [Effects of the Invention]

[0010] According to the present invention, an individually packaged absorbent pad is provided that prevents the fingers from touching the surface of the top sheet of the product when worn. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a cross-sectional view schematically illustrating the configuration of an individually wrapped absorbent pad according to the present embodiment. [Figure 2] 1A and 1B are schematic diagrams showing an embodiment of an absorbent pad, in which (a) is a plan view and (b) is a cross-sectional view taken along the line xx in (a). [Figure 3] 1 is a diagram schematically illustrating an example of a method for producing an individually packaged absorbent pad according to the present embodiment, the method proceeding in the order of (a), (b), (c), (d), and (e). [Figure 4]3A to 3C are schematic diagrams illustrating a method for attaching the individually wrapped absorbent pad according to the present embodiment to underwear. DETAILED DESCRIPTION OF THE INVENTION

[0012] In this specification, "wearing the absorbent pad 50" refers to the state in which the absorbent pad 50 is attached to the wearer's body, regardless of whether it has absorbed bodily fluids or not. The longitudinal direction of the absorbent pad 50 is the direction indicated by Y in the figure, which extends from front to back across the wearer's crotch when the absorbent pad 50 is worn; the width direction is the direction indicated by X in the figure, which is approximately perpendicular to the longitudinal direction; and the thickness direction is the direction in which the components are stacked. The skin-side surfaces of the absorbent pad 50 and its components are the surfaces that contact the wearer's skin or face the skin, and the non-skin-side surfaces are the surfaces that contact the wearer's clothing or face the clothing. Body fluids refer to liquids excreted from the body to the outside, such as urine, blood, and water in loose stools.

[0013] <Individually wrapped absorbent pads> The individually packaged absorbent pad 1 according to this embodiment will be described in more detail below with reference to the drawings. Fig. 1 shows the individually packaged absorbent pad 1 according to this embodiment. Fig. 2 shows an absorbent pad 50. Fig. 3 shows an example of a method for producing the individually packaged absorbent pad 1 according to this embodiment. Fig. 4 shows a method for attaching the individually packaged absorbent pad 1 according to this embodiment. The drawings do not specify the shapes, dimensional relationships, etc. of the individually packaged absorbent pad 1, the absorbent pad 50, and each of the constituent members.

[0014] The absorbent pad 50 included in the individual absorbent pad package 1 according to this embodiment can be used as a variety of absorbent articles for babies, adults, and the elderly, and is particularly suitable for use as pad products such as light incontinence pads, light incontinence liners, sanitary napkins, and panty liners. The longitudinal dimension of the absorbent pad 50 is, for example, in the range of 100 mm to 450 mm, or in the range of 150 mm to 350 mm, and the width dimension is, for example, in the range of 50 mm to 250 mm, or in the range of 50 mm to 180 mm. By keeping each dimension within the aforementioned numerical ranges, an absorbent pad 50 suitable for light incontinence products, sanitary napkins, panty liners, and the like can be obtained.

[0015] 1 and 2, the absorbent article packaging 1 of this embodiment comprises an absorbent pad 50, first and second release sheets 61, 62 releasably adhered to the surface closest to the skin side of the absorbent pad 50 (the surface closest to the skin side of the back sheet 30), and an individual packaging sheet 70 attached to the surface closest to the skin side of the first and second release sheets 61, 62. An imaginary fold line 63 extending widthwise and disposed in the longitudinal direction is set on the skin side surface of the absorbent pad 50, and this fold line 63 is used when folding the absorbent article packaging 1 to produce a product. The absorbent pad 50 and its accessories, the first and second release sheets 61, 62 and the individual packaging sheet 70, are folded along the fold line 63, placed in a packaging bag, and the individual packaging sheet 70 is sealed on both widthwise sides in the thickness direction, to be sold commercially.

[0016] According to this embodiment, an individually wrapped absorbent pad is provided that is easy to open and prevents fingers from touching the surface of the product when worn. Furthermore, according to the individually wrapped absorbent pad 1 of this embodiment, First, the absorbent pad 50 is folded in half or in thirds together with the release sheets 61, 62 and the individual packaging sheet 70 so that the top sheet 10 faces inward, and the release sheets 61, 62 and the individual packaging sheet 70 cannot be separated. Therefore, when the outermost individual packaging sheet 70 is peeled off, at least the first release sheet 61 is peeled off as well, and the non-skin side surface of the back sheet 30 of the absorbent pad 50 to which the adhesive layer 31 is applied can be exposed without contact with fingers, and therefore the absorbent pad 50 can be easily attached to the wearer's underwear. Secondly, even if the individual packaging sheet 70 is peeled off from the individual absorbent pad package 1, the surface of the absorbent pad 50 is folded inward and is not exposed, so it is hygienic. Thirdly, when the absorbent pad 50 is folded in half and packaged, the number of horizontal creases on the skin-facing surface of the absorbent pad 50 is reduced to one from two when the absorbent pad is folded in three, improving the adhesion between the skin-facing surface of the absorbent pad 50 and the wearer's skin and allowing the product thickness of the individually packaged absorbent pad 1 to be thinner.

[0017] The individually packaged absorbent pad 1 of this embodiment will be described in more detail below, in the order of the first and second release sheets 61, 62, the individually packaged sheet 70, and the absorbent pad 50.

[0018] <Release sheet> As shown in FIG. 1 , the first and second release sheets 61, 62 are arranged side by side in the longitudinal direction of the absorbent pad 50 at a predetermined interval between the non-skin-facing surface (front region 51) of the back sheet 30 of the absorbent pad 50 and the skin-facing surface (rear region 53) of the individual wrapping sheet 70. In this embodiment, the absorbent pad 50 is divided in the longitudinal direction into the front region 51, the rear region 53, and the folded region 52 located therebetween. In this embodiment, the absorbent pad 50 is preferably symmetrical in the longitudinal direction. In this case, one of the front region 51 and the rear region 53 primarily contacts the wearer's lower abdomen, and the other primarily contacts the wearer's buttocks, and the first and second release sheets 61, 62 are releasably adhered primarily to the front region 51 and the rear region 53, respectively. The first and second release sheets 61, 62 are releasably adhered to the non-skin-facing surface of the back sheet 30 of the absorbent pad 50 by an adhesive layer 31 for fixing to underwear, which is provided on the non-skin-facing surface of the back sheet 30. The adhesive layer 31 for fixing to underwear will be described in the section on the absorbent pad 50. The first and second release sheets 61, 62 are also non-releasably joined to the individual packaging sheet 70. For this joining, for example, a method using an adhesive with stronger adhesive strength than the adhesive layer 31 for fixing to underwear, a heat fusion method, or the like is used.

[0019] Due to the adhesive structure between the first and second release sheets 61, 62 and the absorbent pad 50 (the non-skin-side surface of the back sheet 30) and the adhesive structure between the first and second release sheets 61, 62 and the individual packaging sheet 70, as shown in Figure 4, when an attempt is made to peel off the individual packaging sheet 70, the first release sheet 61 or the second release sheet 62 peels off along with the individual packaging sheet 70, exposing the non-skin-side surface of the back sheet 30, which is the surface of the absorbent pad 50 that is attached to the underwear. This prevents fingers from directly coming into contact with the top sheet, which is the skin-side surface of the absorbent pad. Furthermore, since only a portion of the non-skin-side surface of the back sheet 30 is exposed, rather than the entire non-skin-side surface, it is easier to attach the back sheet 30 to the underwear 100 and the risk of contact with fingers is significantly reduced.

[0020] Alternatively, the other end of the first release sheet 61 and one end of the second release sheet 62 may extend from each other to form a single continuous release sheet, which may cover the opposing front and rear ends of the absorbent pad 50 when folded. The effect is the same even if the release sheet is not divided into two, and there is no problem. However, it is preferable that the adhesive layer 31 for fixing to underwear is discontinuous in the length direction, as in this embodiment.

[0021] The planar shape of the first and second release sheets 61, 62 may be any shape that covers the adhesive layer formed on the underwear-adhering surface (non-skin-facing surface) of the absorbent pad 50, from the viewpoint of preventing adhesion between the individually wrapped sheet 70 and the adhesive layer. In this embodiment, the planar shapes of the first and second release sheets 61, 62 are rectangular shapes of the same size, but are not limited to this, and examples include circles, ovals, and rectangles with rounded corners.

[0022] Examples of materials for the first and second release sheets 61, 62 include plastic film, nonwoven fabric sheets, and paper, with silicone-treated release paper being preferred. Plastic films and nonwoven fabric sheets may be embossed or stretched to make them easier for elderly people to handle. It is preferable that the surfaces of the release sheets 61, 62 that contact the adhesive layer 81 are not silicone-treated or have a weaker silicone treatment than the opposite surface. This allows the release sheets 61, 62 and the individual packaging sheet 70 to be bonded together in an inseparable manner.

[0023] <Individually wrapped sheets> The individual packaging sheet 70 is non-peelably bonded to the first and second release sheets 61, 62. In the individually packaged absorbent pad 1, peeling off the individual packaging sheet 70 also peels off the first release sheet 61, exposing a portion of the adhesive layer 31 for attaching to underwear formed on the non-skin-facing surface of the back sheet 30 of the absorbent pad 50, allowing the absorbent pad 50 to be easily attached to underwear without contact with fingers. The individual packaging sheet 70 is the outermost layer, and is sized to cover the entire absorbent pad 50. In this embodiment, an adhesive layer 81 is provided between the individual packaging sheet 70 and the first and second release sheets 61, 62. The adhesive layer 81 can be configured by having a larger adhesive area than the adhesive layer 31 for fixing to underwear, by using an adhesive with stronger adhesive strength than the adhesive contained in the adhesive layer 31 for fixing to underwear, or by increasing the amount of adhesive.

[0024] The individual packaging sheet 70 also has a sheet main body 71 that covers the first and second release sheets 61, 62, and a sheet extension portion 72 that extends from the sheet main body 71 in the longitudinal direction toward the rear region 53. More specifically, one end of the sheet main body 71 is located near the outer surface (non-skin-facing surface) of the first release sheet 61, and covers the folded portion 63 and the outer surface of the second release sheet 62. One end of the sheet extension portion 72 covers the opposing front and rear ends of the folded absorbent pad 50, and the other end of the sheet extension portion 72 is located on the outer surface (non-skin-facing surface) of one end of the sheet main body 71. This configuration reliably prevents contact between the individual packaging sheet 70 and the adhesive layer 31 provided on the non-skin-facing surface of the back sheet 30 of the absorbent pad 50 during mass production.

[0025] An tamper-evident indicator (not shown), such as a printed portion or a textured portion, may be provided at one end of the sheet extension portion 72. The printed portion may be printed, for example, by an inkjet method. The textured portion may be formed, for example, by embossing. By providing the tamper-evident indicator, the steps of opening the product, peeling off a portion of the individually wrapped sheet 70 and the first release sheet 61 together, removing the assembly of the individually wrapped sheet 70 and the first and second release sheets 61, 62 while adhering the exposed adhesive layer 31 of the absorbent pad 50 to the skin-facing surface of the underwear, and wrapping the used absorbent pad 50 with the removed assembly can be carried out continuously, smoothly, and easily without touching the skin-facing surface of the absorbent pad 50 before use with one's fingers.

[0026] The individual wrapping sheet 70 is a resin film, paper, nonwoven fabric, or a laminate of two or more of these. From the viewpoint of strength and processability, the basis weight of the individual wrapping sheet 70 is, for example, 10 g / m when it is a resin film or nonwoven fabric. 2 More than 50g / m 2 In the case of paper, for example, 30 g / m 2 More than 70g / m 2 The range is as follows: Although a tab tape (not shown) for opening may or may not be attached to the other end of the sheet extension portion 72 of the individual wrapping sheet 70, it is preferable not to attach a tab tape. In this case, the use of hot melt adhesive can be kept to a minimum, thereby saving resources and avoiding the problems of tab tape, such as difficulty in gripping and easy peeling, as described in Patent Document 1.

[0027] In this embodiment, as shown in FIG. 2( a), the absorbent pad 50 is divided into a front region 51, a folding region 52, and a rear region 53, which are connected in this order in the longitudinal direction. A first release sheet 61 is releasably adhered to the front region 51, and a second release sheet 62 is releasably adhered to the rear region 53. A fold line 63 extending widthwise is provided in the folding region 52, and the absorbent pad 50 is folded in half together with the individual packaging sheet 70 along the folding line 63 of this embodiment. Since the first and second release sheets 61 and 62 are present in the front region 51 and the rear region 53, respectively, a crease is unlikely to be formed when folding in half. When two fold lines 63 are provided, the absorbent pad 50 is folded in thirds together with the individual packaging sheet 70. As will be described later, an adhesive layer 31 for fastening to underwear is provided on the non-skin-facing surface of the back sheet 30.

[0028] 2, the absorbent pad 50 of this embodiment has a top sheet 10, an absorbent body 20, and a back sheet 30 as basic constituent units, and can be modified in various known ways, such as providing the above-mentioned three-dimensional gathers 40 or side sheets (not shown), arranging a second sheet or transfer sheet (not shown) between the top sheet 10 and the absorbent body 20, or covering the absorbent body 20 with a carrier sheet (not shown). Below, the constituent members of the absorbent pad 50 of this embodiment will be described in more detail in the order of the top sheet 10, the absorbent body 20, the back sheet 30, and the three-dimensional gathers 40.

[0029] <Top sheet> The top sheet 10 is a liquid-permeable sheet-like substrate that allows bodily fluids to pass quickly toward the absorbent body 20 and diffuse the bodily fluids in the plane direction of the absorbent body 20. The top sheet 10 is preferably a substrate that is soft to the touch and does not irritate the skin so that it may come into direct contact with the wearer's skin. Examples of such substrates include hydrophilic sheets, composite nonwoven fabrics that are laminates of the same or different hydrophilic sheets, apertured films such as apertured polyethylene films, and foamed films such as polyethylene foam and urethane foam. Examples of hydrophilic sheets include air-through nonwoven fabrics, thermal-bonded nonwoven fabrics, spunlace nonwoven fabrics, and spunbonded nonwoven fabrics made from synthetic fibers made of synthetic resins such as polypropylene and polyethylene, regenerated fibers such as rayon, and natural fibers such as cotton. Among these, the various nonwoven fabrics are preferred.

[0030] The surface of the top sheet 10 may be embossed or perforated to improve liquid permeability. The top sheet 10 may contain one or more of lotions, antioxidants, anti-inflammatory ingredients, pH adjusters, antibacterial agents, moisturizers, etc. to reduce irritation to the skin. The basis weight of the top sheet 10 is set to, for example, 15 g / m² from the viewpoints of strength, processability, and liquid wetting-back. 2 More than 40g / m 2 The following range or 19g / m 2 More than 35g / m 2 The shape of the top sheet 10 is not particularly limited, and may be any shape that covers part or all of the absorbent body 20, which is necessary to guide bodily fluids to the absorbent body 20 without leakage.

[0031] <Absorbent> The absorbent body 20 may be configured to be symmetrical in the longitudinal direction. The longitudinal dimension (maximum length) of the absorbent body 20 is, for example, in the range of 100 mm to 450 mm, 150 mm to 350 mm, or 200 mm to 300 mm. The widthwise dimension (maximum width) of the absorbent body 20 is, for example, in the range of 50 mm to 250 mm, 60 mm to 180 mm, or 70 mm to 150 mm. Examples of the shape of the absorbent body 20 in a planar view include an hourglass shape, an I-shape, a rectangle, a rounded rectangle with rounded corners, and an oval. The absorbent body 20 may be, for example, a fluff absorbent body containing absorbent fibers and a superabsorbent polymer.

[0032] (absorbent fiber) The absorbent fiber is not particularly limited as long as it is one generally used in absorbent articles such as sanitary napkins, disposable diapers, and urine absorption pads, and examples thereof include fluff pulp, cotton, rayon, acetate, tissue, absorbent paper, and hydrophilic nonwoven fabric. Among these, fluff pulp is preferably used from the viewpoint of absorbency. Examples of fluff pulp include wood pulp (for example, bleached coniferous kraft pulp (N-BKP) such as southern pine or Douglas fir), synthetic fiber, resin fiber, and non-wood pulp defibrated into a cotton-like state. When fluff pulp is used as the absorbent fiber as the base material in the absorber 20, the basis weight of the absorbent fiber is, for example, 50 g / m2 from the viewpoint of feel on the skin, body fluid absorption capacity, and the like. 2 More than 800g / m 2 The following range: 100g / m 2 More than 615g / m 2 The range is as follows:

[0033] (Superabsorbent polymer) The superabsorbent polymer (hereinafter also referred to as "SAP") is not particularly limited as long as it can absorb body fluids and prevent backflow, and examples thereof include polyacrylates, polyaspartates, (starch-acrylic acid) graft copolymers, (acrylic acid-vinyl alcohol) copolymers, (isobutylene-maleic anhydride) copolymers, and saponified products thereof. Among these, from the viewpoint of absorption per weight, polyacrylates are preferred, alkali metal polyacrylates are more preferred, and sodium polyacrylate is even more preferred. The superabsorbent polymers can be used alone or in combination of two or more.

[0034] The superabsorbent polymer is used in various forms, such as particulate or fibrous, but is preferably used in particulate form for ease of handling. By avoiding the use of a finely powdered superabsorbent polymer with poor powder flowability and using a superabsorbent polymer with a median particle size, basic absorption performance can be improved and the rough feel that occurs when the absorbent body 20 hardens after absorbing body fluids can be reduced. The median particle size of the superabsorbent polymer 12 is, for example, in the range of 50 μm to 600 μm or in the range of 100 μm to 500 μm. The content of the superabsorbent polymer in the absorbent body 20 is in the range of 40 wt % or more, or in the range of 40 wt % to 70 wt % of the total weight of the absorbent body 20.

[0035] In the absorbent body 20, the absorbent fibers and SAP may be in the form of a mixture of SAP particles in absorbent fibers, or an SAP sheet in which SAP particles are fixed between absorbent fibers. In addition to the fluff absorbent body described above, the absorbent body 20 may also be an absorbent sheet containing multiple hydrophilic sheets with a superabsorbent polymer fixed and supported between them. To prevent leakage of SAP particles from the absorbent body 20 and to stabilize the shape of the absorbent body 20, a carrier sheet (not shown) may be provided under the absorbent body 20 or to completely wrap the absorbent body 20. The substrate of the carrier sheet may be any hydrophilic material, including tissue, absorbent paper, and hydrophilic nonwoven fabrics such as air-laid nonwoven fabrics. When multiple carrier sheets are provided, the substrates of the multiple carrier sheets may be the same or different.

[0036] <Back seat> The backsheet 30 may be formed using a liquid-impermeable substrate that prevents the body fluids retained by the absorbent sheet 20 from wetting the wearer's clothing. Examples of such substrates include resin films and composite sheets that are laminates of resin films and nonwoven fabrics. The nonwoven fabrics used in the composite sheets may be made by any method, and examples include single-layer nonwoven fabrics such as spunbonded nonwoven fabrics and meltblown nonwoven fabrics, composite nonwoven fabrics such as spunbonded nonwoven fabric / meltblown nonwoven fabric laminates, and spunbonded nonwoven fabric / meltblown nonwoven fabric / spunbonded nonwoven fabric laminates, as well as composite materials thereof. Examples of resin films include polyester, polyvinyl alcohol, polyethylene, polypropylene, and composite films of polyethylene and polypropylene.

[0037] The basis weight of the back sheet 30 is, for example, 15 g / m from the viewpoint of strength and processability. 2 More than 60g / m 2The range is as follows. In order to prevent stuffiness during wear, it is preferable that the back sheet 30 be breathable. To make the back sheet 30 breathable, for example, a filler may be blended into the resin film of the base material, or the back sheet 30 may be embossed. An example of the filler is calcium carbonate, and the blending method may be any known method without any restrictions.

[0038] The backsheet 30 has an adhesive layer 31 (hereinafter simply referred to as "adhesive layer 31") on its non-skin-facing surface for fastening to underwear. In this embodiment, the adhesive layer 31 is used, for example, to releasably adhere the first and second release sheets 61, 62 and ultimately to attach the absorbent pad 50 to the underwear. The adhesive layer 31 contains an adhesive that exhibits adhesion to resin films, paper, nonwoven fabrics, etc. The adhesive contained in the adhesive layer 31 is not particularly limited, and known adhesives can be used, such as hot melt adhesives. Hot melt adhesives with melting points of 100°C or higher and 180°C or lower can be used without any particular limitation, and examples thereof include synthetic rubber hot melt adhesives such as styrene-butadiene-styrene copolymers and styrene-isoprene-styrene copolymers, and olefin hot melt adhesives such as ethylene-vinyl acetate copolymers. Known methods for applying the hot melt adhesive can be used, such as the curtain coating method or spiral method, in which a molten hot melt adhesive is applied from a nozzle in a non-contact manner, or the slot method, in which a molten hot melt adhesive is applied in a contact manner. The adhesive layer 81 has the same structure as the adhesive layer 31 .

[0039] <3D gathers> The three-dimensional gathers 40 may be provided at both widthwise ends of the skin-facing surface of the top sheet 10 so as to extend along the longitudinal direction of the absorbent pad 50, for example, in order to prevent side leakage of bodily fluids excreted by the wearer of the absorbent pad 50. The three-dimensional gathers 40 include an elastic stretchable member 40a and a water-repellent and / or waterproof sheet member 40b.

[0040] The elastically stretchable member 40a is disposed along the longitudinal direction near the free end (other end) of the sheet member 40b, imparting upstanding property to the free end and allowing the free end and its neighboring area of ​​the sheet member 40b to deform to fit the wearer's body shape. In this embodiment, one widthwise end (fixed end) of the sheet member 40b is fixed to the skin-side surface of the backsheet 30 near both widthwise ends, a middle portion in the widthwise direction is fixed to the skin-side surface of the topsheet 10 near both widthwise ends, and the other widthwise end is a free end that is upstanding. The fixing position of the fixed end (one widthwise end) of the sheet member 40b is not limited to this embodiment, and examples include the non-skin-side surface of the backsheet 30, near both widthwise ends of the skin-side or non-skin-side surface of the joint between the topsheet 10 and the backsheet 30, which has the absorbent body 20 housed therein, and near both widthwise ends of the skin-side surface of the topsheet 10.

[0041] The sheet member 40b is a water-repellent and / or waterproof sheet, and is made of, for example, a nonwoven fabric. The nonwoven fabric for the first sheet member can be any water-repellent and / or waterproof (liquid-impermeable) nonwoven fabric made of hydrophobic fibers, and examples thereof include spunbond nonwoven fabric, meltblown nonwoven fabric, and composite nonwoven fabric (SMS nonwoven fabric) which is a spunbond nonwoven fabric / meltblown nonwoven fabric / spunbond nonwoven fabric laminate. The basis weight of the sheet member 40b is, for example, 13 g / m 2 More than 20g / m 2 The range is as follows: As the elastic and stretchable member 40a, for example, thread-, string- or band-shaped members made of natural rubber, synthetic rubber, polyurethane or the like can be used as appropriate.

[0042] <Side seat> A pair of side sheets (not shown) may be provided at both longitudinal ends of the skin-facing surface of the top sheet 10, extending in the width direction of the absorbent pad 50. The material of the side sheets is not particularly limited and may be a liquid-impermeable nonwoven fabric or resin film similar to that used for the back sheet 30. The side sheets are provided, for example, so as to cover both longitudinal ends of the top sheet 10 in accordance with its shape, with the longitudinal dimensions of one and the other being, for example, in the range of 10 mm to 30 mm.

[0043] <Individually wrapped absorbent pads> The individually packaged absorbent pad 1 of this embodiment can be produced, for example, by the production method shown in Fig. 3. The production method includes steps (a) to (e). In step (a), an absorbent pad 50 and first and second release sheets 61, 62 are prepared, and the adhesive layer 31 provided on the non-skin side of the absorbent pad 50 (back sheet 30) is bonded to the first and second release sheets 61, 62 to obtain an adhered structure shown in step (b). A YY cross section of this adhered structure is shown in step (c). In this adhered structure, the first release sheet 61 is adhered to either the front region or the back region of the non-skin side of the absorbent pad 50, and the second release sheet 62 is releasably adhered to the other region. In step (d), an individual packaging sheet (not shown) is placed over the end of the first release sheet 61 facing the second release sheet 62, covering the second release sheet 62, and the individual packaging sheet 70 and the second release sheet 62 are non-removably bonded together by an adhesive layer 81. The individual packaging sheet 70 has a remaining length (sheet extension portion 72) (not shown) on the side of the second release sheet 62 opposite the first release sheet 61. In step (d), the absorbent pad 50 is folded inward, and then the remaining length of the individual packaging sheet 70 is folded over and non-removably bonded to the second release sheet 62. In this way, the individual package 1 of the absorbent pad 50 of this embodiment shown in step (e) is obtained. In the non-removable bonding, a large amount of adhesive is used in this embodiment, but as described above, non-removable bonding may also be achieved by selecting the type of adhesive, heat sealing, or the like. The front region 51 of the absorbent pad corresponds to the wearer's ventral side when the pad is in use, and the rear region 53 of the absorbent pad corresponds to the wearer's dorsal side when the pad is in use, but the reverse is also possible. In either case, it is possible to provide an individually packaged absorbent pad 1 that prevents fingers from touching the surface of the top sheet 10 of the product when worn.

[0044] Although the present invention has been described above using embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope of the invention described in the above embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made to the above embodiments. Furthermore, it is apparent from the claims that embodiments incorporating such modifications and improvements can also be included within the technical scope of the present invention. [Explanation of symbols]

[0045] 1. Individually packaged absorbent pad 10 Topsheet 20 Absorbent 30 Back Seat 31 Adhesive layer for fixing to underwear 40 Three-dimensional gathers 40a Elastic and stretchable member 40b Sheet member 50 Absorbent articles 51 Anterior area 52 Folding Area 53 Posterior area 61 First release sheet 62 Second release sheet 63 Turning Line 70 individual sheets 71 Seat body 72 Seat extension 81 Adhesive layer 100 underwear

Claims

1. An individually packaged absorbent pad comprising: an absorbent pad having a longitudinal direction corresponding to the front-to-rear direction of a wearer, the absorbent pad including a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body positioned therebetween; and an individually packaged sheet disposed on the non-skin side of the absorbent pad, The absorbent pad comprises: The front region, the folding region, and the rear region are separated so as to be connected in this order in the longitudinal direction, The backsheet has a non-skin-side surface provided with a discontinuous adhesive layer in the length direction in the front region and the rear region, The device further includes a first release sheet and a second release sheet disposed between the absorbent pad and the individual wrapping sheet, the first release sheet is releasably adhered to the adhesive layer in the front region; the second release sheet is releasably adhered to the adhesive layer in the rear region; The individual packaging sheet has a sheet main body portion and a sheet extension portion extending from the sheet main body portion toward the rear region, one end of the sheet main body portion is located near the outer surface of the first release sheet, and covers the outer surface of the folded region of the back sheet and the outer surfaces of the second release sheet; the sheet extension portion covers the opposing front and rear ends of the folded absorbent pad, and the other end of the sheet extension portion is located on the outer surface of one end of the sheet main body portion; the first release sheet is non-removably bonded to the sheet extension portion and is not bonded to the sheet main body portion; the second release sheet is bonded to the sheet main body portion in an unremovable manner; Individually packaged absorbent pads.

2. The individually packaged absorbent pad according to claim 1 , wherein the other end of the sheet extension portion is provided with an opening indicator.

3. The individually packaged absorbent pad according to claim 2 , wherein the opening indicator is a printed portion or an uneven portion.

4. 4. The individually packaged absorbent pad according to claim 1, wherein the absorbent pad is folded in half along the outer surface of the folding region of the backsheet.

5. 5. An individually packaged absorbent pad according to claim 1, wherein the front region of the absorbent pad is one of the ventral side and the back side of the wearer when the pad is in use, and the rear region of the absorbent pad is the other of the ventral side and the back side of the wearer when the pad is in use.

6. 6. An individually packaged absorbent pad as described in any one of claims 1 to 5, wherein the other end side end of the first release sheet and the one end side end of the second release sheet are extended from each other to form a single continuous release sheet, and the release sheet covers the opposing front and rear ends of the absorbent pad when it is folded.

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