absorbent articles

Abstract

To provide an absorbent article with wings, being not bulky and having excellent compactness.SOLUTION: Provided is an absorbent article with wings, having a body part in which an absorber is interposed between a liquid-permeable top sheet and a liquid-nonpermeable back sheet, a pair of three-dimensional gathers provided along a longitudinal direction on the skin-contact surface side of the body part, and two wing parts that are each protruded from both ends in the width direction of the body part. In the absorbent article, the wing parts include an upper sheet in which either of the top sheet and at least the three-dimensional gathers extends in the width direction, a lower sheet in which back sheet extends in the width direction, and an absorber for wings held between the upper sheet and the lower sheet, and the wing parts are disposed in the width direction by shifting a phase in the longitudinal direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an absorbent article with wings. [Background technology]

[0002] Generally, absorbent articles are composed of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet, so that bodily fluids such as urine pass through the top sheet and are absorbed by the absorbent body.

[0003] Among absorbent articles, some sanitary napkins and pads for mild incontinence are equipped with wings to improve the fixation of the product to underwear.

[0004] For example, Patent Document 1 discloses a winged sanitary napkin having a breathable and liquid-permeable top sheet, a breathable and liquid-impermeable back sheet, and an absorbent core sandwiched between these two sheets, with wings formed by laterally extending portions of the back sheet and sheet material joined to the extended portions, and adhesive fastening areas formed on the surfaces of the wings that come into contact with the wearing shorts, wherein the sheet material is breathable and is joined to the extended portions of the back sheet and the base ends of the extended portions at multiple joining portions that extend widthwise and are arranged intermittently lengthwise of the napkin, and describes a technique in which the wings are formed simply by laminating the extended portions of the back sheet to which an adhesive is applied and another sheet material that is joined to the extended portions. On the other hand, Patent Document 2 discloses an absorbent article characterized in that at least three pairs of wing-shaped flaps are arranged along the longitudinal direction of the main body portion, with a pair of wing-shaped flaps on the left and right sides of the main body portion having an absorbent interposed between a liquid-permeable top sheet and a back sheet, and at least the pair of left and right wing-shaped flaps located at the rearmost part of these wing-shaped flaps are hip-hold wing-shaped flaps with an absorbent interposed therebetween, and in the product state before use, all of the wing-shaped flaps are folded toward the back sheet side. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-210330 [Patent Document 2] Japanese Patent Application Laid-Open No. 2009-232950 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the structure of the invention described in Patent Document 1 had the drawback of being thin and stiff, making it difficult to attach to underwear. Also, unexpected side leakage can occur when using a product with wings, and this structure could not prevent this leakage. Furthermore, the invention described in Patent Document 2 discloses a technology that simultaneously solves the problems of Patent Document 1, but on the other hand, when the wings are folded, the wings overlap each other, making the individual packaging thicker after folding, which makes it less portable.

[0007] The present invention has been made in view of the above circumstances, and has an object to provide an absorbent article with wings that is not bulky and has excellent compactness. [Means for solving the problem]

[0008] The inventors have conducted extensive research and have found that in an absorbent article with wings having two wing portions protruding from both widthwise ends of a main body portion, the wing portions include an upper sheet from which at least one of a top sheet or a three-dimensional gather extends in the widthwise direction, a lower sheet from which a back sheet extends in the widthwise direction, and a wing absorbent body sandwiched between the upper sheet and the lower sheet, and the wing portions are arranged alternately in the widthwise direction with a phase shift in the longitudinal direction, thereby making it possible to produce an absorbent article with wings that is not bulky and has excellent compactness, and have completed the present invention.

[0009] (1) A first aspect of the present invention is an absorbent article with wings, which has a main body portion in which an absorbent body is sandwiched between a liquid-permeable top sheet and a liquid-impermeable back sheet, a pair of three-dimensional gathers arranged along the longitudinal direction of the skin-contacting surface side of the main body portion, and two wing portions protruding from both ends of the main body portion in the width direction, wherein the wing portions include an upper sheet from which at least one of the top sheet or the three-dimensional gathers extends in the width direction, a lower sheet from which the back sheet extends in the width direction, and a wing absorbent body sandwiched between the upper sheet and the lower sheet, and the wing portions are arranged alternately in the width direction with a phase shift in the longitudinal direction.

[0010] (2) A second aspect of the present invention is an absorbent article as described in (1), characterized in that the main body portion has a first fold line and a second fold line extending in the width direction for folding into thirds, and the wing portions are provided one on each side in the crotch region between the first fold line and the second fold line in the longitudinal direction.

[0011] (3) A third aspect of the present invention is an absorbent article according to (1) or (2), characterized in that the wing portion includes one wing portion and another wing portion, and the one wing portion and the other wing portion are arranged so that, when folded, the wing absorbent body of the one wing portion and the wing absorbent body of the other wing portion do not overlap each other.

[0012] (4) A fourth aspect of the present invention is an absorbent article as described in (3), characterized in that the longitudinal distance between one base end of one wing portion closer to the other wing portion and the other base end of the other wing portion closer to the one wing portion is 2 mm or more.

[0013] (5) A fifth aspect of the present invention is an absorbent article as described in (3) or (4), characterized in that the sum of the angle θ1 formed by the rear edge of one wing portion and one longitudinal side of the main body portion and the angle θ2 formed by the front edge of the other wing portion and the other longitudinal side of the main body portion is 160° or less.

[0014] (6) A fifth aspect of the present invention is an absorbent article according to any one of (1) to (5), characterized in that a slit portion is provided in the center of the wing absorbent body.

[0015] (7) A fifth aspect of the present invention is an absorbent article according to any one of (1) to (6), characterized in that a fold line slit is provided along the longitudinal direction near the main body portion in the width direction of the wing absorber.

[0016] (8) The eighth aspect of the present invention is an absorbent article according to any one of (1) to (7), characterized in that the wing absorber and the absorber are connected at least partially in the width direction, and a waterproof sheet is laminated on the skin-contacting side of the upper sheet. [Effects of the Invention]

[0017] According to the present invention, it is possible to provide an absorbent article with wings that is not bulky and has excellent compactness. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a plan view of an absorbent article according to one embodiment of the present invention, viewed from the top sheet side. [Figure 2] FIG. 2 is a cross-sectional view taken along line Y1-Y1 in FIG. [Figure 3] FIG. 10 is a plan view of an absorbent article according to another embodiment of the present invention, viewed from the top sheet side. [Figure 4] FIG. 4 is a cross-sectional view taken along line Y1-Y1 in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, a mode for carrying out the present invention (hereinafter simply referred to as "the present embodiment") will be described in detail. The following present embodiment is an example for explaining the present invention, and is not intended to limit the present invention to the following content. The present invention can be carried out by appropriately modifying it within the scope of its gist. In the drawings, the same elements are denoted by the same reference numerals, and redundant explanations will be omitted. Furthermore, unless otherwise specified, the positional relationships, such as up, down, left, and right, are based on the positional relationships shown in the drawings. Furthermore, the dimensional ratios of the drawings are not limited to those shown in the drawings.

[0020] In the description of this specification, "wearing the absorbent article 1" refers to at least one of when the absorbent article 1 is being worn and after it has been worn. The longitudinal direction of the absorbent article 1 is the direction from the front to the back of the wearer when the absorbent article 1 is worn, and is the direction indicated by the symbol X in the drawings. The width direction of the absorbent article 1 is the direction horizontal to or perpendicular to the longitudinal direction, and is the direction indicated by the symbol Y in the drawings. Furthermore, the "skin-contacting surface" refers to the surface of each component, such as the absorbent body, that faces the wearer's skin when worn, and the "non-skin-contacting surface" refers to the surface of each component, such as the absorbent body, that faces away from the wearer's skin when worn. Body fluids refer to liquids excreted from the body to the outside, such as urine and water in loose stools. Furthermore, examples of the absorbent article 1 include sanitary napkins and mild incontinence pads, and mild incontinence pads are particularly preferred, but the absorbent article 1 is not limited thereto and may be other absorbent articles.

[0021] <Absorbent articles> Fig. 1 is a plan view of an absorbent article 1 according to an embodiment of the present invention, viewed from the top sheet 11 side. Fig. 2 is a cross-sectional view taken along line Y1-Y1 in Fig. 1. As shown in Figs. 1 and 2, the absorbent article 1 is a winged absorbent article 1 having a main body portion 10 in which an absorbent body 13 is interposed between a liquid-permeable top sheet 11 and a liquid-impermeable back sheet 12, a pair of three-dimensional gathers 20 provided along the longitudinal direction of the skin-contacting surface side of the main body portion 10, and two wing portions 30 protruding from both ends of the main body portion 10 in the width direction. As a result, the absorbent body 13 is sandwiched between the top sheet 11 and the back sheet 12.

[0022] <Main body> The longitudinal dimension of the main body 10 of the absorbent article 1 is preferably 100 mm to 500 mm, and the width dimension is preferably 50 mm to 250 mm. By adjusting the dimensions of the main body 10 to fall within the above ranges, an absorbent article 1 suitable for use as a sanitary napkin, incontinence pad, etc. can be obtained.

[0023] (Top sheet) The top sheet 11 may be formed from a liquid-permeable substrate that allows bodily fluids to move into the absorbent body 13, and may be, for example, a known hydrophilic nonwoven fabric such as a thermal-bonded nonwoven fabric or a spun-bonded nonwoven fabric. Furthermore, the surface of the top sheet 11 may be embossed or perforated to improve liquid permeability. Any known method can be used for embossing or perforating the top sheet 11 without any restrictions. Furthermore, to reduce irritation to the skin, the top sheet 11 may contain lotions, antioxidants, anti-inflammatory ingredients, pH adjusters, antibacterial agents, moisturizers, and the like. From the viewpoints of strength, processability, and liquid return, the basis weight of the top sheet 11 is 10 g / m 2 More than 300g / m 2 Preferably, it is 15 g / m or less. 2 More than 200g / m 2The following is more preferable: The shape of the top sheet 11 is not particularly limited, but it may have a shape that covers the absorbent body 13 and is necessary to guide bodily fluids to the absorbent body 13 without leakage.

[0024] (back seat) The backsheet 12 may be formed using a liquid-impermeable substrate that prevents the body fluids held by the absorbent body 13 from wetting clothing, and a breathable or non-breathable, liquid-impermeable plastic film may be used.

[0025] From the viewpoint of strength and processability, the basis weight of the back sheet 12 is 10 g / m 2 More than 60g / m 2 Preferably, it is 15 g / m or less. 2 More than 40g / m 2 It is more preferable that the back sheet 12 is breathable. For example, a filler may be blended into the resin film substrate or the back sheet 12 may be embossed. An example of the filler is calcium carbonate, and the blending method may be any known method without limitation.

[0026] (absorbent) In the main body 10 of the absorbent article 1 of the present invention, the longitudinal dimension of the absorbent body 13 is preferably 70 mm to 450 mm, more preferably 100 mm to 400 mm, and the width dimension of the absorbent body 13 is preferably 40 mm to 230 mm, more preferably 50 mm to 200 mm. The absorbent body 13 preferably contains absorbent fibers and superabsorbent polymer (hereinafter also referred to as SAP) as a base material.

[0027] The absorbent fiber is not particularly limited as long as it is one that is generally used in absorbent articles, and examples thereof include fluff pulp, cotton, rayon, acetate, tissue, absorbent paper, hydrophilic nonwoven fabric, etc. 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, non-wood pulp, etc. that has been defibrated into a cotton-like state. When fluff pulp is used as the absorbent fiber base material in the absorber 13, the basis weight of the absorbent fiber is not particularly limited, but is preferably 100 g / m 2 More than 800g / m 2 Preferably, it is 150 g / m or less. 2 More than 600g / m 2 It is more preferable that the absorbent body 13 is equal to or less than 10 ...

[0028] The SAP contained in the absorbent body 13 is not particularly limited as long as it can absorb body fluids and prevent backflow, and can be made from materials such as sodium polyacrylate, polyaspartate, (starch-acrylic acid) graft copolymer, (acrylic acid-vinyl alcohol) copolymer, (isobutylene-maleic anhydride) copolymer, and saponified products thereof. Among these, sodium polyacrylate is preferred from the viewpoint of absorption per weight. The basis weight of the SAP is not particularly limited, but is preferably 50 g / m 2 More than 500g / m 2 It is preferable that the weight is less than 100 g / m 2 More than 300g / m 2 More preferably, it is:

[0029] In the absorbent body 13, the absorbent fibers and SAP may be in the form of a mixture of absorbent fibers and SAP particles, or a sheet with SAP particles fixed between absorbent fibers. A carrier sheet (not shown) may be provided to encase the absorbent body 13 in order to prevent leakage of the SAP particles and stabilize the shape of the absorbent body 13. The substrate of the carrier sheet may be any hydrophilic material, such as tissue, absorbent paper, airlaid nonwoven fabric, or spunbond nonwoven fabric, with spunbond nonwoven fabric being preferred. When multiple carrier sheets are provided, the substrates of the multiple carrier sheets may be the same or different.

[0030] <3D gathers> As shown in Figure 1, the absorbent article 1 further includes a pair of three-dimensional gathers 20 along the longitudinal direction on the skin-contacting surface side of the main body 10 in order to prevent leakage of bodily fluids excreted by the wearer to the left and right (side leakage). The pair of three-dimensional gathers 20 are arranged such that the outer ends of the pair of three-dimensional gathers 20 in the width direction of the absorbent article 1 are fixed to the back sheet 12, the inner ends are fixed to the top sheet 11, and the center is a free end that is not fixed to the top sheet 11. By providing the pair of three-dimensional gathers 20 along the longitudinal direction, the pair of three-dimensional gathers 20 have the ability to stand up and can be deformed to fit the body shape of the wearer. From the standpoints of strength and processability, the basis weight of the pair of three-dimensional gathers 20 is set to 10 g / m 2 More than 50g / m 2 It is preferable that:

[0031] <Wing section> Furthermore, the absorbent article 1 of the present invention has two wing portions 30 that protrude from both ends of the main body portion 10 in the width direction. As shown in Fig. 1, the wing portions 30 are arranged in a staggered manner in the width direction with a phase difference in the longitudinal direction. By arranging the wing portions 30 in this manner, when the wing portions 30 are folded toward the center of the absorbent article 1 in the width direction, they do not overlap each other, which makes it possible to reduce the bulkiness of the individually packaged absorbent article 1 and to provide an absorbent article 1 with wings that is highly compact. Wing portions 30 may be positioned freely at any position in the longitudinal direction as long as they are positioned as described above, but as shown in Figure 1, main body portion 10 has first fold line 14 and second fold line 15 extending in the width direction for folding into thirds, and it is preferable that wing portions 30 are provided one on each side in crotch region 16 between first fold line 14 and second fold line 15 in the longitudinal direction. By limiting the region in which wing portions 30 are provided to crotch region 16, i.e., the crotch portion where the underwear is attached, it is possible to concentrate on improving fit and leak prevention in the crotch portion of the underwear.

[0032] The wing portion 30 includes an upper sheet 31 in which at least one of the top sheet 11 or the three-dimensional gathers 20 extends in the width direction, a lower sheet 32 ​​in which the back sheet 12 extends in the width direction, and a wing absorbent 33 sandwiched between the upper sheet 31 and the lower sheet 32. In this case, the upper sheet 31 can use the same base material as the top sheet 11 or the three-dimensional gathers 20, the lower sheet 32 ​​can use the same base material as the back sheet 12, and the wing absorbent body 33 can use the same base material as the absorbent body 13. The upper sheet 31 and the top sheet 11 or the three-dimensional gathers 20, the lower sheet 32 ​​and the back sheet 12, and the wing absorbent body 33 and the absorbent body 13 may use different base materials, but from the standpoint of processability, it is preferable to use the same base material, and it is also preferable that the basis weights be in the same numerical range.

[0033] 1, it is preferable that a slit portion 34 is provided in the center of the wing absorbent body 33. By providing the slit portion 34, it becomes easier to grasp the wing portion 30 when putting on or discarding the absorbent article 1, making the actions of putting on or discarding easier.

[0034] 1, the wing portion 30 preferably includes one wing portion 301 and another wing portion 302, and the one wing portion 301 and the other wing portion 302 are preferably arranged such that the wing absorbent body 33 of the one wing portion 301 and the wing absorbent body 33 of the other wing portion 302 do not overlap each other when folded. The wing portion 30 may be made slightly larger to improve fixation to the underwear. Even if the regions of the wing portion 30 (the one wing portion 301 and the other wing portion 302) formed solely by laminating the upper sheet 31 and the lower sheet 32 ​​overlap when folded, the individual packaging does not become bulky, and therefore the absorbent article 1 with wings can be made highly fixable and compact.

[0035] Furthermore, it is preferable that the longitudinal distance D1 between one base end of one wing portion 301 closer to the other wing portion 302 and the other base end of the other wing portion 302 closer to the one wing portion 301 is 2 mm or more. If D1 is 2 mm or more, the wing portions 30 are less likely to overlap when the absorbent article 1 is processed, and are more likely to open when the absorbent article 1 is worn. It is more preferable that D1 is 2 mm or more and 10 mm or less.

[0036] 1, the sum of the angle θ1 formed between the rear edge of one wing portion 301 and one longitudinal side of the main body portion 10 and the angle θ2 formed between the front edge of the other wing portion 302 and the other longitudinal side of the main body portion 10 is preferably 160° or less. If the angle is 160° or less, the wing portions 30 are less likely to overlap each other when the absorbent article 1 is processed, and are more likely to open when the absorbent article 1 is worn. It is more preferable that the sum of angle θ1 and angle θ2 be 60° or more and 160° or less.

[0037] 3, which is a plan view of another embodiment, and FIG. 4, which is a cross-sectional view thereof, the wing absorbent bodies 33 and the absorbent body 13 may be connected at least partially in the width direction. When the wing absorbent bodies 33 are connected to the absorbent body 13 of the main body part 10, bodily fluid that cannot be absorbed by the absorbent body 13 of the main body part 10 can be diffused to and absorbed by the wing absorbent bodies 33, thereby reducing side leakage. 3 and 4, a waterproof sheet 36 may be laminated on the skin-contacting side of the upper sheet 31 in order to prevent side leakage of bodily fluids from the skin-contacting side and to concentrate the bodily fluids in the main body 10. The base material and basis weight of the waterproof sheet 36 are preferably the same as those of the back sheet 12 of the main body 10.

[0038] 3 and 4, fold line slits 35 may be provided along the longitudinal direction of the wing absorbent body 33, closer to the main body portion 10 in the width direction. By providing the fold line slits 35, it becomes easier to fold the wing portions 30 when individually packaging or when disposing of the used absorbent article 1.

[0039] 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 described in the above embodiments. 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 clear from the claims that such modifications and improvements can also be included within the technical scope of the present invention. [Explanation of symbols]

[0040] 1. Absorbent articles 10 Main body 11 Topsheet 12 Back Seat 13 Absorbent 14, 15 Fold lines 16 Crotch area 20 Three-dimensional gathers 30, 301, 302 Wing section 31 Upper seat 32 Lower seat 33 Wing absorber 34 Slit section 35 Fold line slit 36 Tarpaulin

Claims

1. An absorbent article with wings, comprising: a main body portion in which an absorbent body is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet; a pair of three-dimensional gathers provided along the longitudinal direction of the skin-contacting surface side of the main body portion; and two wing portions, each of which has three straight sides and protrudes from both ends of the main body portion in the width direction, The wing portion includes an upper sheet from which at least one of the top sheet and the three-dimensional gathers extends in the width direction, a lower sheet from which the back sheet extends in the width direction, and a wing absorbent body sandwiched between the upper sheet and the lower sheet, the wing portions are arranged out of phase with each other in the longitudinal direction so that the wing portions do not overlap with each other when folded, the wing portion includes one wing portion and another wing portion, the one wing portion and the other wing portion are arranged such that, when folded, the wing absorber of the one wing portion and the wing absorber of the other wing portion do not overlap each other; the sum of an angle θ1 formed between a rear side of one wing portion and one side of the main body in the longitudinal direction and an angle θ2 formed between a front side of the other wing portion and another side of the main body in the longitudinal direction is 160° or less, a longitudinal distance between one root end portion of the one wing portion closer to the other wing portion and another root end portion of the other wing portion closer to the one wing portion is 2 mm or more; A slit portion is provided in the center of the wing absorber, An absorbent article, characterized in that the wing absorber has a fold line slit along the longitudinal direction near the main body portion in the width direction.

2. The main body portion has a first fold line and a second fold line extending in the width direction for folding into thirds, The absorbent article according to claim 1 , wherein the wing portions are provided on the left and right sides of the crotch region between the first fold line and the second fold line in the longitudinal direction.

3. The wing absorber and the absorber are at least partially connected in the width direction, 3. The absorbent article according to claim 1, wherein a waterproof sheet is laminated on the skin-contacting surface side of the upper sheet.

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