JP6114234B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article.

  Conventionally, an absorptive article provided with an absorber containing particles of superabsorbent polymer is known (for example, patent documents 1). The absorber of patent document 1 is provided with the upper liquid absorption part containing the particle | grains of a superabsorbent polymer, and the lower liquid absorption part arrange | positioned at the non-skin opposing surface side of an upper liquid absorption part. According to the absorbent article of Patent Document 1, the body fluid discharged from the wearer is drawn into the upper liquid absorption part via the top sheet, and the body fluid is held by the super absorbent polymer in the upper liquid absorption part.

JP 2013-39163 A

  The upper liquid absorption part and the lower liquid absorption part of Patent Document 1 are made of an absorbent sheet in which particles of a superabsorbent polymer are arranged between fiber layers. The superabsorbent polymer particles move more easily than fibers such as pulp, and when the absorbent body depends, the superabsorbent polymer particles move from the fiber layer, and the skin facing surface side of the absorbent article May be exposed. As a result, there is a possibility that the superabsorbent polymer particles may spill and the absorption performance may be lowered, or the superabsorbent polymer particles may touch the user's skin and deteriorate the wearing feeling.

  Therefore, the present invention has been made in view of the above-described problems, and suppresses the exposure of the superabsorbent polymer particles to the skin-facing surface side of the absorbent article, thereby reducing the absorption performance and the feeling of wearing. It aims at providing the absorptive article which can control.

  In order to solve the above-described problem, an absorbent article according to the present disclosure includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber provided between the top sheet and the back sheet, An absorbent article having a product longitudinal direction and a product width direction orthogonal to each other, wherein the absorbent body is disposed on a skin-opposing surface side of the first absorbent layer containing particles of a superabsorbent polymer and the first absorbent layer. And a second absorbent layer that does not contain particles of the superabsorbent polymer, and includes a liquid-permeable intermediate sheet disposed between the first absorbent layer and the second absorbent layer. And

  According to the present disclosure, it is possible to provide an absorbent article that suppresses the exposure of the superabsorbent polymer particles to the skin-facing surface side of the absorbent article and suppresses the deterioration of the absorption performance and the wearing feeling.

It is a top view of an absorptive article concerning an embodiment. It is AA sectional drawing shown in FIG. It is BB sectional drawing shown in FIG.

  With reference to drawings, the manufacturing method of the absorptive article concerning an embodiment and the absorptive article manufactured by the manufacturing method concerned are explained. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones. Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

(1) Configuration of absorbent article The configuration of the absorbent article will be described with reference to FIGS. 1 and 2. FIG. 1 is a plan view of an absorbent article manufactured by the method for manufacturing an absorbent article according to the present embodiment. 2 is a cross-sectional view taken along the line AA shown in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line BB shown in FIG. The absorbent article 1 according to the present embodiment is a sanitary napkin.

  The absorbent article 1 includes a central area CA including an area where the wearer's excretion opening faces, a front area FA located on the front side of the wearer with respect to the central area CA, and a rear side of the wearer with respect to the central area CA. And a rear region RA located therein. A region where a pair of wing portions described later is disposed is a central region CA.

  The absorbent article 1 has a product longitudinal direction L extending to the wearer's body front side and the body rear side, a product width direction W orthogonal to the product longitudinal direction, and a thickness direction T. The thickness direction T has a skin facing surface side T1 and a non-skin facing surface side T2 which is the opposite side.

  The absorbent article 1 includes a liquid-permeable top sheet 10, a liquid-impermeable back sheet 20, an absorber 30, and a liquid-permeable intermediate sheet 40. The absorber 30 is disposed between the top sheet 10 and the back sheet 20 in the thickness direction. The absorber 30 is indicated by a broken line in FIG.

The top sheet 10 is a liquid-permeable sheet that transmits liquid such as body fluid. The top sheet 10 covers at least the skin facing surface of the absorber 30. As the surface sheet 10, a nonwoven fabric, a woven fabric, a perforated plastic sheet, a mesh sheet, or the like can be used. The topsheet 10 of this embodiment is the apertured film of polyethylene having a basis weight of 20 g / m ^2.

The back sheet 20 is a liquid-impermeable sheet that does not transmit liquid such as body fluid. The back sheet 20 covers at least the non-skin facing surface of the absorber 30. As the back sheet 20, a polyethylene sheet, a laminated nonwoven fabric mainly composed of polypropylene, a breathable resin film, a sheet in which a breathable resin film is bonded to a nonwoven fabric such as spunbond or spunlace, and the like can be used. The back sheet 20 of the present embodiment is a film made of polyethylene having a basis weight of 20 g / m ² .

  The absorber 30 is formed of an absorbent material that can absorb body fluid such as menstrual blood. Absorbent materials include hydrophilic fibers, pulp, and superabsorbent polymer particles. The absorbent body 30 includes a first absorbent layer 31 and a second absorbent layer 32 disposed on the skin facing surface side with respect to the first absorbent layer 31. The length of the second absorbent layer 32 in the product width direction W is longer than the length of the first absorbent layer 31 in the product width direction W. The length of the second absorbent layer 32 in the product longitudinal direction L is longer than the length of the first absorbent layer 31 in the product longitudinal direction L.

The first absorption layer 31 includes particles (not shown) of superabsorbent polymer. The first absorbent layer 31 of the present embodiment, a tissue having a basis weight 15 g / ^{m 2,} and the pulp having a basis weight of 60 g / ^{m 2,} and particles of superabsorbent polymers having a basis weight of 60 g / ^{m 2,} a basis weight of 60 g / ^{m 2} It is a five-layer structure in which pulp and tissue with a basis weight of 15 g / m ² are laminated in the thickness direction. The first absorbent layer 31 is embossed. The embossing is provided in a dot shape in plan view.

  In addition, the 1st absorption layer 31 should just contain the particle | grains of a superabsorbent polymer, may contain other absorbent materials other than a pulp, and does not need to contain a pulp. The first absorbent layer 31 preferably has a covering sheet such as a tissue in order to prevent the superabsorbent polymer particles from spilling.

The second absorbent layer 32 contains pulp and does not contain particles of superabsorbent polymer. The 2nd absorption layer 32 of this Embodiment consists of a pulp with a fabric weight of 450 g / m < ² >. The second absorbent layer 32 only needs to have a configuration that does not include particles of the superabsorbent polymer, and may include an absorbent material other than pulp, such as hydrophilic fibers.

The intermediate sheet 40 is a liquid-permeable sheet, and allows the body fluid from the second absorption layer 32 to pass through the first absorption layer 31. The intermediate sheet 40 of the present embodiment is an SMS nonwoven fabric made of polypropylene having a basis weight of 15 g / m ² . The intermediate sheet 40 may be composed of an air-through nonwoven fabric or an airlaid pulp sheet.

  The intermediate sheet 40 is preferably hydrophilic. According to the hydrophilic intermediate sheet 40, the liquid body fluid from the second absorbent layer 32 passes through the first absorbent layer 31, while menstrual blood from the second absorbent layer 32 passes through the first absorbent layer 31. It becomes difficult to do. As a result, the liquid body fluid can be efficiently absorbed by the superabsorbent polymer particles contained in the first absorbent layer 31.

  The intermediate sheet 40 is disposed between the first absorbent layer 31 and the second absorbent layer 32 in the thickness direction. The length of the intermediate sheet 40 in the product width direction W is longer than the length of the absorbent body 30 in the product width direction W, and the length of the intermediate sheet 40 in the product longitudinal direction L is the length of the absorbent body 30 in the product longitudinal direction L. Longer than that.

  The intermediate sheet 40 is longer in the product width direction W of the intermediate sheet 40 than the length of the first absorbent layer 31 in the product width direction W, and the intermediate sheet 40 is longer in the product longitudinal direction L. The one absorbent layer 31 is preferably configured to be longer than the length in the product longitudinal direction L. Moreover, it is preferable that the intermediate sheet 40 is arrange | positioned in the position which forms the pressing groove 60 mentioned later. The length of the intermediate sheet in the product width direction is longer than the length of the compressed groove in the product width direction, and the length of the intermediate sheet in the product longitudinal direction is longer than the length of the compressed groove in the product longitudinal direction. It is preferable that

  The absorbent article 1 includes a wing portion 50 that is disposed outside the absorbent body 30 in the product width direction W. The wing part 50 is folded back to the non-skin facing surface side during use and is detachably bonded to the underwear.

  The periphery of the topsheet 10 and the periphery of the backsheet 20 of the present embodiment reach the periphery of the absorbent article. The periphery of the surface sheet 10 and the back sheet 20 is joined, and the absorber 30 is enclosed. The absorbent article may include a side sheet that covers the side edge of the top sheet 10 and that extends from the side edge of the top sheet 10 to the outside in the product width direction W.

  In the back sheet 20, an adhesive (not shown) is applied to the surface in contact with the undergarment in a plurality of regions. In a state before use, the adhesive is in contact with a release sheet (not shown). The release sheet prevents the adhesive from deteriorating before use. And a peeling sheet peels by a wearer at the time of use.

  The topsheet 10, the second absorbent layer 32, and the intermediate sheet 40 are formed with compressed grooves 60 that are compressed in the thickness direction. The pressing groove 60 has a double annular shape in plan view. The pressing groove 60 includes an annular first pressing groove 61, an annular second pressing groove 62 positioned outside the first pressing groove in a plan view, and a first pressing groove 61 and a second pressing in a plan view. And an annular third pressing groove 65 located between the grooves 62. The third pressing groove 65 is an annular shape smaller than the first pressing groove 61 and smaller than the second pressing groove 62. Two third compressed grooves 65 are formed in each of the front area FA and the rear area RA.

  On the skin facing surface of the top sheet 10 and the skin facing surface of the second absorbent layer 32, a recess is formed that is recessed toward the non-skin facing surface. On the non-skin facing surface of the second absorbent layer 32 and the non-skin facing surface of the intermediate sheet 40, recesses that are recessed toward the skin facing surface are formed. On the other hand, the compressed groove is not formed in the first absorbent layer 31 and the back sheet 20. Therefore, a space S is formed between the skin-facing surface of the first absorbent layer 31 and the non-skin-facing surface of the intermediate sheet 40.

  The 1st pressing groove 61 and the 2nd pressing groove 62 have the high pressing part 63 and the low pressing part 64, respectively. The high-pressure squeezed part 63 is a part compressed with a higher force than the low-pressure squeezed part 64. The high pressing part 63 is dot-like in plan view. The high pressing parts 63 are arranged side by side at intervals, and are configured to form a certain region as a whole. In FIG. 1, the portion shown in a dotted shape in the pressing groove is the high-pressure pressing portion 63, and the portion other than the dotted shape in the pressing groove is the low-pressure pressing portion 64. In addition, the low pressing part 64 is not restricted to the area | region compressed with the low force, The area | region which is not compressed is included. That is, the squeezing groove may be constituted only by the high-pressure squeezing part.

  The area ratio of the high pressing portion 63 in the front area FA is higher than the area ratio of the high pressing portion 63 in the central area CA. Moreover, the area ratio of the high pressing part 63 of rear side area | region RA is higher than the area ratio of the high pressing part 63 of center area | region CA.

  In addition, the area ratio of the high pressing part 63 is a ratio of the area of the high pressing part 63 in the said division with respect to the area of a fixed division here. The area ratio of the high pressing part 63 of this Embodiment can be measured with the following method. The absorbent article 1 is divided into a plurality of sections adjacent to the product longitudinal direction L. The length in the width direction of each section is the maximum width in the product width direction of the absorber 30, and the length in the product longitudinal direction of each section is 5 mm. Each section has a horizontally long shape that is long in the product width direction and has a constant area. And the area of the high pressing part 63 in each division is measured. Subsequently, the ratio of the area of the high pressing part with respect to the area of a division is calculated.

  The area ratio of the high pressing part 63 of the front area FA is higher than the area ratio of the high pressing section 63 of the division located in the central area CA. It is defined as being higher than the area ratio of the CA high pressure squeezed portion 63. Moreover, the area ratio of the high pressing part 63 of the division located in the rear area RA is higher than the area ratio of the high pressing section 63 of the division located in the central area CA. It is defined that the area ratio is higher than the area ratio of the high pressing portion 63 of the central area CA.

(2) Manufacturing method of absorbent article Next, an example of a manufacturing method of the absorbent article will be described. In addition, about the method which is not demonstrated, the existing method can be used. The manufacturing method of an absorbent article performs a surface sheet supply process first. In the surface sheet supply step, the surface sheet 10 is supplied. Subsequently, a 2nd absorption layer shaping | molding process is performed. In the second absorbent layer forming step S <b> 2, an absorbent material containing pulp is laminated, and the second absorbent layer 32 is formed. Subsequently, a 2nd absorption layer lamination process is performed. In the second absorbent layer laminating step, the second absorbent layer 32 is disposed on the top sheet 10 and the top sheet 10 and the second absorbent layer 32 are laminated. In addition, the order of a surface sheet supply process, a 2nd absorption layer shaping | molding process, and a 2nd absorption layer lamination process is not limited.

  As a subsequent process of the second absorbent layer laminating process, an intermediate sheet arranging process is performed. In the intermediate sheet arranging step, the intermediate sheet 40 is arranged on the second absorbent layer 32. The top sheet 10, the second absorbent layer 32, and the intermediate sheet 40 are disposed so as to overlap in the thickness direction. Next, a compressed groove forming step is performed. In the pressing groove forming step, the pressing grooves 60 are formed on the top sheet 10, the absorber 30 and the intermediate sheet 40 by embossing.

  Moreover, a 1st absorption layer shaping | molding process is performed. In the first absorbent layer forming step, an absorbent material containing particles of a superabsorbent polymer is laminated to form the first absorbent layer 31. Subsequently, a 1st absorption layer lamination process is performed as a post process of a pressing groove formation process, and a 1st absorption layer shaping | molding process. In the first absorbent layer lamination step, the first absorbent layer 31 is disposed on the intermediate sheet 40. The top sheet 10, the second absorbent layer 32, the intermediate sheet 40, and the first absorbent layer 31 are arranged so as to overlap in the thickness direction.

  As a subsequent process of the first absorbent layer laminating process, a back sheet laminating process is performed. In the back sheet stacking step, the back sheet 20 is stacked on the absorber 30, the intermediate sheet 40, and the like. Then, the back surface sheet | seat is joined and the process of apply | coating an adhesive agent to a back surface sheet is provided. The absorbent article in this Embodiment can be manufactured according to said process.

(3) Action / effect Since the second absorbent layer 32 disposed on the skin-facing surface side T1 of the absorbent article 1 does not have superabsorbent polymer particles, the superabsorbent polymer particles are the skin of the absorbent article 1. Exposure to the facing surface side can be suppressed. Compared with a configuration in which the second absorbent layer 32 has particles of a superabsorbent polymer, it is possible to suppress a decrease in absorption performance and a deterioration in wearing feeling.

  Moreover, the 1st absorption layer 31 arrange | positioned at the non-skin opposing surface side of the 2nd absorption layer 32 has the particle | grains of a superabsorbent polymer. Therefore, even if a large amount of body fluid is discharged, the body fluid can be retained by the superabsorbent polymer particles. Moreover, even if it is a case where a wearer's body closely_contact | adheres after body fluid absorption, rewetting can be suppressed.

  In addition, since the intermediate sheet 40 is disposed between the first absorbent layer 31 and the second absorbent layer 32, even if the particles of the superabsorbent polymer leak from the first absorbent layer 31, it is highly absorbent. It can suppress that the particle | grains of a property polymer transfer to the 2nd absorption layer 32 and the surface sheet 10. FIG. Therefore, exposure of the superabsorbent polymer particles to the skin contact surface side of the absorbent article 1 can be suppressed.

  Since the length of the second absorbent layer 32 is longer than the length of the first absorbent layer 31 in the product longitudinal direction and the product width direction, the first absorbent layer 31 can be covered by the second absorbent layer 32. As a result, even when the superabsorbent polymer particles leak from the first absorbent layer 31, the transition of the superabsorbent polymer particles to the topsheet 10 can be suppressed.

  Since the compressed groove 60 is formed in the second absorbent layer 32, the second absorbent layer 32 can be easily deformed using the compressed groove 60 as a deformation base point. Therefore, the absorber 30 is arrange | positioned compactly at the time of use, and becomes easy to arrange | position along a wearer's body. In addition, by forming the compressed groove 60 that communicates with the second absorbent layer 32 and the top sheet 10, the rigidity of the absorbent body 30 is increased, and even when the absorbent body 30 is used for a long period of time, the sway of the absorbent body 30 is suppressed. it can. For example, when the absorbent body 30 is swung, particles of the superabsorbent polymer in the first absorbent layer may leak. By increasing the rigidity of the absorbent body 30, it is possible to suppress the sway of the absorbent body 30 and to suppress leakage of the superabsorbent polymer particles. Moreover, it becomes easy to draw a bodily fluid into the 2nd absorption layer 32 by making the pressing groove 60 connected to the 2nd absorption layer 32 and the surface sheet 10. FIG.

Moreover, since the pressing groove 60 is formed in the intermediate sheet 40, a concave portion due to the pressing groove 60 is formed in the intermediate sheet 40. Therefore, it is the space S between the intermediate sheet 40 and the first absorbent layer 3 1. Even if the particles of the superabsorbent polymer from the first absorption layer 31 is spilled, it can hold particles of the superabsorbent polymer in the space S between the intermediate sheet 40 and the first absorbent layer 3 1, superabsorbent It can suppress that the particle | grains of a property polymer transfer to the 2nd absorption layer 32 and the surface sheet 10. FIG.

  The absorbent article 1 is likely to depend on the movement of the legs and the buttock at the front end and the rear end of the absorbent article 1. However, the ratio of the high pressing parts 63 in the front area FA is higher than the ratio of the high pressing parts 63 in the central area CA, and the ratio of the high pressing parts 63 in the rear area RA is the ratio of the high pressing parts 63 in the central area CA. Therefore, the distortion of the front area FA and the rear area RA can be suppressed as compared with the central area CA. On the other hand, the central area CA facing the wearer's excretion opening can be deformed flexibly because the ratio of the area of the high-compressed portion 63 is relatively low, and the uncomfortable feeling at the time of wearing can be suppressed.

(4) Modifications As described above, the contents of the present invention have been disclosed through the embodiments of the present invention. However, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. Absent. From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art.

  For example, the absorbent article according to the modification may be configured such that the length of the intermediate sheet in the product width direction is shorter than the length of the first absorbent layer in the product width direction, or the length of the intermediate sheet in the product longitudinal direction. May be shorter than the length of the first absorbent layer in the product longitudinal direction. Moreover, as for the absorbent article which concerns on a modification, the pressing groove does not need to be formed.

  The absorbent article is not limited to a sanitary napkin, and may be an absorbent pad or a panty liner.

L ... Product longitudinal direction T ... Thickness direction W ... Product width direction 1 ... Absorbent article 10 ... Top sheet 20 ... Back sheet 30 ... Absorber 31 ... First absorbent layer 32 ... Second absorbent layer 40 ... Intermediate sheet 50 ... Wing Unit 60 ... pressing groove 61 ... first pressing groove 62 ... second pressing groove 63 ... high pressure pressing section 64 ... low pressure pressing section

Claims (6)

Including a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber provided between the top sheet and the back sheet,
An absorbent article having a product longitudinal direction and a product width direction orthogonal to each other,
The absorber is
A first absorbent layer comprising particles of superabsorbent polymer;
A second absorbent layer that is disposed on the skin-facing surface side of the first absorbent layer and does not contain particles of the superabsorbent polymer;
Wherein the first absorbent layer is disposed between the second absorbent layer, e Bei a liquid-permeable intermediate sheet,
The second absorbent layer and the intermediate sheet have pressing grooves that are pressed in the thickness direction,
On the skin-facing surface of the first absorbent layer, no pressing groove is formed,
The non-skin facing surface of the intermediate sheet is formed with a recess made of the compressed groove,
The absorbent article in which the space by the recessed part is formed between the skin opposing surface of the said 1st absorption layer, and the non-skin opposing surface of the said intermediate sheet.   The absorbent article according to claim 1, wherein the compressed groove is formed by pressing the top sheet, the second absorbent layer, and the intermediate sheet in the thickness direction. The length of the intermediate sheet in the product width direction is longer than the length of the first absorbent layer in the product width direction,
The absorbent article according to claim 1 or 2, wherein a length of the intermediate sheet in a product longitudinal direction is longer than a length of the first absorbent layer in a product longitudinal direction.   The length of the intermediate sheet in the product width direction is longer than the length of the second absorbent layer in the product width direction,
  The absorbent article according to claim 3, wherein a length of the intermediate sheet in the product longitudinal direction is longer than a length of the second absorbent layer in the product longitudinal direction.   The absorbent article according to any one of claims 1 to 4, wherein the second absorbent layer and the intermediate sheet cover the entire skin-facing surface of the first absorbent layer. A central region including a region where the wearer's excretion opening is opposed; a front region located on the wearer's front side relative to the central region; and a rear region located on the rear side of the wearer relative to the central region. Have
The compressed groove has a low-pressure squeezed part and a high-pressure squeezed part compressed with a stronger force than the low-pressure squeezed part,
The area ratio of the high pressing portion in the front region is higher than the area ratio of the high pressing portion in the central region,
The absorbent article according to any one of claims 1 to 5 , wherein an area ratio of the high pressing portion in the rear region is higher than an area ratio of the high pressing portion in the central region.

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