JP5330804B2 - Absorbent articles - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article, wherein if functional materials with additional functions such as deodorization, antimicrobial action, etc. are added, they can securely display these additional functions without rewetting the wearer's body. <P>SOLUTION: The absorbent article 1 includes a surface sheet 10, a back sheet 20 provided at a position remoter from the wearer's body than the surface sheet 10 and a functional absorber 310 including functional materials (e.g., a herbal medicine material) to provide at least additional functions located at the central part of the absorbent article 1 between the front and back sheets 10 and 20 corresponding to the position where body fluid flows out from the wearer. The absorbent article 1 further includes a wearer's side absorber 320 that is characterized in that it is provided at a position nearer to the wearer's body than, is larger in size than and is to cover the functional absorber 310, and that body fluid can less widely spread in the wearer's side absorber 320 than in the functional absorber 310. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention is a functional absorber provided at a central portion of an absorbent article corresponding to an outflow location of body fluid from a wearer, including a functional material that absorbs body fluid from the wearer and provides at least an additional function. It is related with an absorbent article provided with.

  Conventionally, absorbent articles such as sanitary napkins and panty liners are generally liquid-permeable surface sheets provided on the wearer side, liquid-impermeable back sheets provided on non-wearers, and surface sheets. And a main body absorbent sheet that is disposed between the back sheet and absorbs body fluid from the wearer.

  Such an absorbent article is required to have not only a water retaining function for body fluid from a wearer but also an additional function such as a deodorizing function, an antibacterial function, an aroma function, and a heat retaining function. For example, in order to impart a deodorizing function, an absorbent article provided with a functional absorbent body in which a granular material of a functional material such as a deodorant is wrapped with a pulp sheet between a surface sheet and a main body absorbent sheet. It is known (see, for example, Patent Document 1).

In general, functional material powders are often colored in black, brown, yellow, etc., and the wearer visually recognizes which additional functions the product has by color. It is configured to be able to. In other words, the wearer can confirm which additional function is given by recognizing the color of the area where the functional material powder is provided.
JP-A-2002-272769 (page 2-3, FIGS. 1 and 2)

  However, the conventional absorbent article described above has the following problems. That is, body fluid from the wearer passes through the top sheet and is absorbed by the functional absorbent body and the main body absorbent sheet, but when pressure (for example, body pressure) is applied to the absorbent article, the functional material powder Body fluid mixed with granules may leak from the topsheet. Specifically, the bodily fluid once absorbed by the functional absorbent body and the main body absorbent sheet may adhere to the wearer's skin, so-called rewetting may occur.

  In particular, when the functional material powder is colored, rewetting occurs and the topsheet becomes soiled, which causes discomfort to the wearer.

  Moreover, in order to suppress rewet, it is possible to thicken the pulp sheet which wrapped the granular material of the functional material. However, when the pulp sheet is thick, the body fluid from the wearer is less likely to penetrate into the granular material of the functional material, and the additional function is hardly exhibited.

  Then, this invention aims at provision of the absorbent article which can exhibit an additional function reliably and suppresses rewetting, when the functional material which provides additional functions, such as a deodorizing function and an antibacterial function, is provided. .

  In order to solve the above-described problems, the present invention has the following features. First, the first feature of the present invention is a liquid-permeable surface sheet (surface sheet 10) provided on the wearer side, and a back sheet (back surface sheet 20) provided on the non-wearer side with respect to the surface sheet. A functional material (for example, a Chinese herbal medicine material) that is provided between the center portion of the absorbent article corresponding to the body fluid outflow location from the wearer and between the top sheet and the back sheet and that provides at least an additional function. An absorbent article (e.g., absorbent article 1) comprising a functional absorber (functional absorbent body 310) including the functional absorbent, provided closer to the wearer than the functional absorbent body. A wearer-side absorbent body (wearer-side absorbent body 320) that is larger than the body and covers the functional absorbent body, and the diffusibility of the body fluid in the wearer-side absorbent body is the same as that in the functional absorbent body. Body fluid diffusivity And summarized in that remote small.

  ADVANTAGE OF THE INVENTION According to this invention, when the functional material which provides additional functions, such as a deodorizing function and an antibacterial function, is provided, while being able to exhibit an additional function reliably, the absorbent article which suppresses rewet can be provided. .

[First Embodiment]
Hereinafter, the absorbent article 1 according to the first embodiment of the present invention will be described with reference to the drawings. Specifically, (1) the configuration of the absorbent article, (2) the configuration of the absorbent body, (3) the manufacturing method of the absorbent article, (4) the action / effect, and (5) the modified example will be described.

  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 First, the configuration of the absorbent article 1 according to the first embodiment will be described with reference to the drawings. FIG. 1 is a developed top view (plan view) showing an absorbent article 1 according to the first embodiment. FIG. 2 is an exploded perspective view showing the absorbent article 1 according to the first embodiment. The absorbent article 1 according to the first embodiment is a panty liner.

  As shown in FIGS. 1 and 2, the absorbent article 1 includes a vertically long surface sheet 10 that is liquid permeable, a vertically long back sheet 20 that is liquid permeable or liquid impermeable, a top sheet 10 and a back surface. At least a vertically long absorbent body 30 that is disposed between the sheets 20 and absorbs body fluid from the wearer is provided.

  Here, a plurality of embossments 60, 61, 62 joined to the absorbent article 1 by compressing a part of the topsheet 10 and a wearer side absorbent body 320 constituting the absorbent body 30 described later. (First joint) is provided. The top sheet 10 is joined to the back sheet 20 by a hot melt adhesive or the like.

  The plurality of embosses 60 are formed in a dot shape. The plurality of embosses 61 are arranged in a long ring shape along the longitudinal direction LD of the absorbent article 1, that is, along the outer shape of the absorbent article 1. The plurality of embosses 62 are arranged in a long annular shape along the longitudinal direction LD of the absorbent article 1 inside the region surrounded by the plurality of embossments 61.

  The top sheet 10 allows the body fluid from the wearer to pass through the absorber 30. The top sheet 10 is provided closer to the wearer than the back sheet 20 and the absorber 30. The top sheet 10 is larger than the absorber 30 and is disposed so as to cover the absorber 30. As the surface sheet 10, a spunlace nonwoven fabric having 100% cotton short fibers and a fiber length of 15 to 40 mm can be used.

It is preferable that the back sheet 20 does not transmit body fluid from the wearer absorbed by the absorber 30. The back sheet 20 is provided closer to the non-wearer than the top sheet 10 and the absorber 30. The back sheet 20 is preferably made of a material excellent in water leakage resistance so that liquid such as excrement absorbed by the absorbent body 30 does not adhere to underwear or the like. For example, the back sheet 20 is a polyethylene film 23 g / m ² .

(2) Configuration of Absorber Next, the configuration of the absorber 30 that is a feature of the present invention will be described with reference to the drawings. FIG. 3 is a cross-sectional view (A-A cross-sectional view of FIG. 1) showing the absorbent article 1 according to the first embodiment.

  As shown in FIG. 3, the absorbent body 30 includes at least a functional absorbent body 310 and a wearer-side absorbent body 320.

(2-1) Configuration of Functional Absorber The functional absorber 310 absorbs body fluid from the wearer and provides additional functions such as a deodorizing function, an antibacterial function, an aroma function, and a heat retaining function. The functional absorber 310 is provided at the central portion corresponding to the outflow location of the body fluid from the wearer. That is, the center portion indicates the approximate center in the longitudinal direction LD and the width direction WD of the absorbent article 1 in a plan view of the absorbent article 1 (see FIG. 1).

  The functional absorber 310 is pressed at least partially after the mixture 311 is coated with the two exterior sheets 312, that is, after the mixture 311 is sandwiched between the two exterior sheets 312. It is the sheet | seat shape joined by. For example, as the pressure treatment, a plurality of dot-shaped embosses 63 (see FIG. 2) can be cited.

  The mixture 311 is composed of at least one kind of colored (brown) functional Chinese medicine material as a functional material and absorbent pulp.

The basis weight of the traditional Chinese medicine material is, for example, 10 to 60 g / m ² . The herbal medicine material is evenly arranged (that is, uniformly dispersed) within the range covered with the exterior sheet 312 by mixing with the absorbent pulp.

  Traditional Chinese medicine materials provide other additional functions (for example, deodorizing function, antibacterial function, fragrance function, heat retaining function) in addition to the function of retaining body fluid from the wearer. The herbal medicine material is selected according to the function required for the functional absorber 310 and is also considered from the viewpoint of the manufacturing process. For example, the fineness distribution and the average powder diameter of Chinese herbal medicine materials are taken into consideration. That is, the ratio of the herbal medicine material and the absorbent pulp takes into consideration the balance of the absorbability and productivity of the functional absorbent 310 and the appearance of the product.

The Chinese herbal medicine material contains at least one of Kashiwa or Katsuki, which is a herbal medicine, and Toki. For example, Kagiko, Toki, and Artemisia are used at 10 g / m ² for Chinese medicine materials. The herbal medicine material is preferably black, brown, or yellow, and particularly preferably has a brownish brown color.

  Here, the effects of cocoon leaves include warming the body, increasing appetite, promoting bile secretion, and hemostasis. Examples include abdominal pain, heartburn, diarrhea, nosebleeds, hematuria, and hemorrhoids. As for the color of the bamboo leaves, green to brown is common.

  The effects of Kobushi include menstrual disease, blood purification, analgesia, gynecological diseases such as menstrual irregularities, menstrual pain, and menopause as chronic analgesics, chronic gastritis, duodenal ulcer, and neurogenic gastritis. As for the color of Katsuki, dark brown is common.

  The effects of Toki include blood loss, coldness, blood circulation disorder, blood replacement, tonic, and analgesic gynecological diseases. Brown is a common color for homecoming.

The basis weight of the absorbent pulp is, for example, 50 to 90 g / m ² . Examples of the absorbent pulp include NBKP pulp (conifer bleached kraft pulp).

As described above, the exterior sheet 312 sandwiches the mixture 311 formed by the herbal medicine material and the absorbent pulp. The exterior sheet 312 may be liquid permeable. An example of the exterior sheet 312 is a tissue. For example, the exterior sheet 312 is 23 g / m ² .

(2-2) Configuration of Wearer Side Absorber The wearer side absorbent body 320 is provided on the wearer side of the functional absorbent body 310, that is, between the functional absorbent body 310 and the topsheet 10. The wearer side absorbent body 320 is joined to the topsheet 10 by a plurality of dot-like embosses 60. The wearer side absorbent body 320 is joined to the functional absorbent body 310 by a hot melt adhesive or the like.

  Here, the interval S1 between the plurality of embosses 60 is preferably wider than the interval S2 between the plurality of embosses 63 obtained by pressure-treating the functional absorber 310 (the functional material and the exterior sheet) described above. That is, the ratio of the surface area of the plurality of embosses 60 (first joints) to the surface area of the wearer-side absorber 320 is based on the ratio of the surface areas of the plurality of embosses 63 (second compression parts) to the surface area of the functional absorber 310. Is preferably small.

  The wearer-side absorbent body 320 is larger than the functional absorbent body 310 and covers the functional absorbent body 310. That is, the wearer side absorbent body 320 is larger than the surface area of the functional absorbent body 310. Moreover, it is preferable that the wearer side absorber 320 is higher in density than the top sheet 10.

  The diffusibility of body fluid in the wearer side absorbent body 320 is smaller than the diffusibility of body fluid in the functional absorbent body 310. In particular, the diffusibility of body fluid in the wearer side absorbent body 320 is preferably smaller than 120% of the diffusibility of body fluid in the functional absorbent body 310.

  The water holding capacity of the wearer side absorbent body 320 is larger than that of the functional absorbent body 310. In particular, the water retention capacity of the wearer side absorbent body 320 is preferably greater than 120% of the water retention capacity of the functional absorbent body 310.

The thickness of the wearer side absorber 320 is 1.5 mm. The basis weight of the wearer side absorbent body 320 is 70 g / m ² . The wearer side absorbent body 320 includes air-laid pulp composed of 60% of the same pulp as the absorbent pulp, 30% of the PE / PET core-sheath structure fiber, and the vinyl acetate resin 10.

(3) Manufacturing method of absorbent article Next, the manufacturing method of the absorbent article 1 which concerns on 1st Embodiment is demonstrated, referring drawings. Drawing 4 is a figure showing the manufacturing method of absorptive article 1 concerning a 1st embodiment.

  The manufacturing method of the absorbent article 1 includes each member forming step, a first joining step, a second joining step, a third joining step, and a fourth joining step.

(3-1) Each member shaping | molding process In each member shaping | molding process, the surface sheet 10, the back surface sheet 20, and the absorber 30 are shape | molded. For example, when the functional absorber 310 is molded, the functional absorber 310 is molded by sandwiching the mixture 311 (Chinese medicine material and absorbent pulp) between the two exterior sheets 312. The functional absorber 310 is compressed by applying a predetermined pressure (so-called a plurality of embosses 63) in a state where the mixture 311 is sandwiched between the exterior sheets 312 and is formed into a sheet with a predetermined thickness. . For example, the predetermined pressure is preferably 2.0 to 3.3 MPa.

(3-2) As shown in the first joining process drawing 4 (a), in the first joining step, the topsheet 10 and the wearer-side absorber 320 is bonded by a plurality of embossing 60 dots. Specifically, a part of the surface on the wearer side absorbent body 320 side in the topsheet 10 and a part of the surface on the topsheet 10 side of the wearer side absorbent body 320 are joined.

  In addition, it is preferable that the space | interval S1 between the some embossing 60 to which the surface sheet 10 and the wearer side absorber 320 are joined is wider than the space | interval S2 (refer FIG. 2) between the some embossing 63 mentioned above. That is, the ratio of the surface area of the plurality of embosses 60 to the surface area of the wearer-side absorber 320 is preferably smaller than the ratio of the surface area of the plurality of embosses 63 to the surface area of the functional absorber 310.

(3-3) As shown in the second joining step view 4 (b), in the second bonding step, the back sheet 20 and the functional absorbent 310 is intermittently bonded by a hot melt adhesive or the like. Specifically, a part of the surface of the back sheet 20 on the side of the functional absorber 310 and a part of the surface of the functional absorber 310 (the exterior sheet 312) on the side of the back sheet 20 are intermittently joined. .

  Note that intermittent means that the entire surfaces of the surfaces to be joined are not joined, and the surfaces are joined in a dot shape, dotted line shape, linear shape, spiral shape, or the like so as to provide an unjoined region. Indicates joining.

(3-4) Third Joining Step As shown in FIG. 4 (c), in the third joining step, the functional absorbent body 310 and the wearer side absorbent body 320 are joined intermittently by a hot melt adhesive or the like. Is done. Specifically, a part of the surface on the wearer side absorbent body 320 side in the functional absorbent body 310 (exterior sheet 312) and a part of the surface on the functional absorbent body 310 side of the wearer side absorbent body 320 are. It is joined intermittently.

(3-5) As shown in the fourth joining step diagram 4 (d), in the fourth joining step, the top sheet 10 and the functional absorbent 310, and the backsheet 20 intermittently by a hot-melt adhesive or the like Are joined together. Specifically, a part of the surface of the top sheet 10 and the functional absorber 310 on the back sheet 20 side and a part of the surface of the top sheet 10 in the back sheet 20 are joined intermittently.

(4) Action / Effect According to the first embodiment, the functional absorbent body 310 is provided in the central portion of the absorbent article 1 corresponding to the body fluid outflow location from the wearer. According to this, it becomes easy to absorb the body fluid from a wearer. Therefore, additional functions such as a deodorizing function, an aroma function, an antibacterial function, and a heat retaining function can be surely exhibited.

  The wearer side absorbent body 320 is larger than the functional absorbent body 310 and covers the functional absorbent body 310. That is, the wearer-side absorber 320 has a larger surface area for absorbing body fluid than the functional absorber 310. Moreover, the diffusibility of the body fluid in the wearer side absorber 320 is smaller than the diffusibility of the body fluid in the functional absorber 310. According to this, the wearer-side absorbent body 320 can cause the functional absorbent body 310 to absorb body fluid while suppressing diffusion of the body fluid on the wearer-side absorbent body 320. For this reason, while being able to exhibit an additional function reliably, compared with the functional absorber 310, the area | region (henceforth an absorbable area | region) which can absorb a bodily fluid remains in the wearer side absorber 320. FIG.

  By the way, when the functional absorber 310 is saturated, the bodily fluid once absorbed by the functional absorber 310 returns from the functional absorber 310 to the wearer side absorber 320 (that is, liquid return occurs). However, even when liquid return occurs, as described above, the absorbable region remains in the wearer-side absorbent body 320, so that the body fluid that has returned to the liquid can be absorbed by the wearer-side absorbent body 320. Therefore, it can suppress that the bodily fluid once absorbed by the functional absorber 310 adheres to a wearer's skin, ie, rewetting.

  According to 1st Embodiment, it is preferable that the diffusibility of the bodily fluid in the wearer side absorber 320 is smaller than 120% of the diffusibility of the bodily fluid in the functional absorber 310. In addition, when the diffusibility of the body fluid in the wearer side absorber 320 is larger than 120% of the diffusibility of the body fluid in the functional absorber 310, the body fluid from the wearer diffuses in the wearer side absorber 320, and the body fluid is Since it is absorbed using the wide area | region of the wearer side absorber 320, the said bodily fluid becomes difficult to transfer to the functional absorber 310, and an additional function may be hard to be exhibited.

  According to 1st Embodiment, the water retention of the bodily fluid in the wearer side absorber 320 is larger than the water retention of the bodily fluid in the functional absorber 310. According to this, since the body fluid moves to the functional absorbent body 310 in the state in which the absorbable region that is not used for the absorption of body fluid remains widely in the wearer side absorbent body 320, liquid return occurs temporarily. Even in this case, the returned body fluid can be reliably absorbed by the wearer side absorbent body 320.

  According to 1st Embodiment, it is preferable that the water retention of the wearer side absorber 320 is larger than the water retention 120% of the functional absorber 310. In addition, when the water retention of the wearer side absorbent body 320 is smaller than 120% of the water retention capacity of the functional absorbent body 310, even if liquid return occurs, the returned body fluid is used as the wearer side absorbent body 320. May be difficult to absorb.

  According to 1st Embodiment, the functional absorber 310 and the wearer side absorber 320 are joined by the hot melt adhesive. Temporarily, when the diffusibility of the body fluid of the wearer side absorbent body 320 is smaller than the diffusibility of the body fluid of the functional absorbent body 310, at least a part of the functional absorbent body 310 and the wearer side absorbent body 320 is compressed. When the bonding is performed (for example, embossing), the body fluid is likely to collect in the compression bonded portion, and when liquid return occurs, the body fluid is likely to leak from the compression bonded portion to the topsheet 10 side. End up. However, when the functional absorbent body 310 and the wearer side absorbent body 320 are joined together by the hot melt adhesive, the diffusibility of the body fluid of the wearer side absorbent body 320 is made to be the diffusibility of the bodily fluid of the functional absorbent body 310. The diffusivity of the body fluid of the wearer-side absorbent body 320 can be kept smaller than the diffusibility of the body fluid of the functional absorbent body 310 without approaching the body. Therefore, since the absorbable area | region of the wearer side absorber 320 remains, even if it is a case where liquid return generate | occur | produces, the body fluid which returned liquid can be absorbed with the wearer side absorber 320. FIG.

  According to 1st Embodiment, the functional absorber 310 has a functional material and an absorptive pulp. According to this, it becomes easy to arrange a functional material (namely, Chinese medicine material) equally. That is, the functional material is uniformly dispersed. Therefore, the hue of the functional absorbent 310 is not biased, and the additional function provided by the traditional Chinese medicine material can be reliably exhibited in the entire functional absorbent 310 without impairing the appearance of the absorbent article 1.

  According to 1st Embodiment, space | interval S1 between the some embossing 60 to which the surface sheet 10 and the wearer side absorber 320 are joined is between several embossing 63 to which the functional process was performed to the functional absorber 310. FIG. It is wider than the interval S2. That is, the ratio of the surface area of the plurality of embosses 60 to the surface area of the wearer-side absorber 320 is smaller than the ratio of the surface area of the plurality of embosses 63 to the surface area of the functional absorber 310. According to this, while the thickness of the functional absorber 310 whole becomes thin, the density of the functional absorber 310 whole becomes large. For this reason, the diffusibility of the body fluid in the functional absorbent body 310 is larger than the diffusibility of the body fluid in the wearer-side absorbent body 320.

  For example, rather than compressing the entire functional absorber 310 uniformly with a smooth roll or the like, the pressure applied to each dot increases by compressing with a roll or the like having a convex portion in a dot shape. The bonding force between the functional absorbent 310, that is, the mixture 311 and the exterior sheet 312 is increased, the movement of the functional material (that is, the Chinese medicine material) can be restricted, and the functional material can be arranged more evenly. On the other hand, the diffusibility of the body fluid in the wearer side absorbent body 320 is smaller than the diffusibility of the body fluid in the functional absorbent body 310, so that the additional function can be exhibited reliably and rewetting can be suppressed.

(5) Modification Examples The absorbent article 1 according to the first embodiment described above may be modified as follows. FIG. 5 is a cross-sectional view showing an absorbent article 1A according to a modified example. In addition, the same code | symbol is attached | subjected to the same part as the absorbent article 1 which concerns on 1st Embodiment mentioned above, and a different part is mainly demonstrated.

  In the absorbent article 1 which concerns on 1st Embodiment mentioned above, the absorber 30 has the functional absorber 310 and the wearer side absorber 320. FIG. On the other hand, 1 A of absorbent articles which concern on a modified example have the non-wearer side absorber 330 in addition to the functional absorber 310 and the wearer side absorber 320 by the absorber 30. FIG.

  Specifically, as shown in FIG. 5A, the non-wearer side absorber 330 absorbs body fluid that has passed through the functional absorber 310. The non-wearer side absorber 330 is disposed on the non-wearer side of the functional absorbent body 310, that is, between the back sheet 20 and the functional absorbent body 310.

  The non-wearer side absorber 330 is intermittently joined to the functional absorber 310 by a hot melt adhesive or the like. Moreover, the non-wearer side absorber 330 is intermittently joined to the back sheet 20 by a hot melt adhesive or the like.

  The non-wearer side absorbent body 330 is configured by a sheet formed of the same airlaid pulp or wet pulp nonwoven fabric as the wearer side absorbent body 320.

Airlaid pulp has a weight ratio of NBKP pulp (conifer bleached kraft pulp) of 20 to 90%, PE / PP or PE / PET core-sheath fiber (or side-by-side fiber) of 0 to 70%, binder resin / vinyl acetate resin, or Synthetic rubber such as styrenic thermoplastic elastomer (for example, SBS or SEBS) is constituted by 2 to 30%. The non-wearer side absorbent body 330 is an airlaid pulp sheet having a basis weight of 40 g / m ² and a thickness of 0.7 mm. The thickness of the air laid pulp sheet is preferably 0.2 mm to 2.0 mm, and particularly preferably 0.4 mm to 1.6 mm.

The wet pulp nonwoven fabric has a NBKP beating pulp weight ratio of 20 to 90%, polyethylene short fiber SWP of 0 to 50%, rayon short fiber (1.1 to 2.2 dtex fiber length of 3 to 10 mm) of 0 to 50%, The paper strength enhancer (cationized starch or the like) is 0.5 to 4%. In addition, the whole fabric weight of a wet pulp nonwoven fabric is 20-120 g / m < ² >, It is especially preferable that it is 25-100 g / m < ² >.

  According to the absorbent article 1A according to the modified example, in addition to the functional absorbent body 310 and the wearer side absorbent body 320, the body fluid that has passed through the functional absorbent body 310 can be obtained by having the non-wearer side absorbent body 330. The non-wearer side absorber 330 can absorb more efficiently.

  Here, the non-wearer side absorbent body 330 does not necessarily have to be intermittently joined to the functional absorbent body 310 with a hot melt adhesive or the like, for example, as shown in FIG. May be intermittently joined to the functional absorber 310 by a plurality of embosses 65 joined by being compressed.

  According to this, the non-wearer side absorbent body 330 and the functional absorbent body 310 are joined by a plurality of embosses 65, thereby increasing the joining strength as compared with the case of joining by a hot melt adhesive or the like. In addition, the fluidity of the body fluid from the wearer-side absorbent body 320 to the non-wearer-side absorbent body 330 is enhanced (that is, the body fluid is easily transferred to the non-wearer-side absorbent body 330). It can be efficiently absorbed by the non-wearer side absorber 330.

[Second Embodiment]
Hereinafter, an absorbent article 100 according to a second embodiment of the present invention will be described with reference to the drawings. Specifically, (1) the configuration of the absorbent article, (2) the configuration of the absorbent body, (3) the method for manufacturing the absorbent article, and (4) the action / effect will be described. In addition, the same code | symbol is attached | subjected to the same part as the absorbent article 1 which concerns on 1st Embodiment mentioned above, and a different part is mainly demonstrated.

(1) Configuration of Absorbent Article First, the configuration of the absorbent article 100 according to the second embodiment will be described with reference to the drawings. FIG. 6 is a top development view (plan view) showing the absorbent article 100 according to the second embodiment. FIG. 7 is an exploded perspective view showing the absorbent article 100 according to the second embodiment. Note that the absorbent article 100 according to the present embodiment is a sanitary napkin.

  As shown in FIGS. 6 and 7, the absorbent article 100 includes a topsheet 10, a topsheet 10, and an absorbent body 30, and side sheets 40 disposed on both sides of the side portion of the topsheet 10. Prepare.

  Here, the absorbent article 100 is provided with an absorbent region 50 along the longitudinal direction LD substantially at the center in the width direction WD of the absorbent article 100. The absorption region 50 is configured by the top sheet 10 and the absorber 30. The absorption region 50 is provided with a plurality of embosses 66A and 66B joined by compressing a part of the top sheet 10, the functional absorbent body 310, and the non-wearer side absorbent body 330.

  Wing portions 70 </ b> L and 70 </ b> R extending outward in the width direction WD are formed on both sides of the side portion of the absorbent article 100. The wing portions 70L and 70R are formed by the side sheet 40 and the back sheet 20.

As the surface sheet 10, 70% of a core / sheath fiber made of polyethylene / polypropylene (hereinafter referred to as PE / PP core / sheath fiber) and a fiber of a core / sheath structure made of polyethylene / polyethylene terephthalate (hereinafter referred to as PE / PET core sheath). Structural fiber) 30% air-through nonwoven fabric. For example, the surface sheet 10 is 30 g / m ² .

  The side sheet 40 contacts the surface sheet 10 on the outer side in the width direction WD of the surface sheet 10. Specifically, the side sheets 40 are joined to the top sheet 10 by a plurality of embosses 67 that are formed at substantially equal intervals along the longitudinal direction LD and are joined by being compressed at least partially. The side sheet 40 is preferably a material excellent in water repellency.

(2) Configuration of Absorber Next, the configuration of the absorber 30 that is a feature of the present invention will be described with reference to the drawings. FIG. 8 is a cross-sectional view (BB cross-sectional view of FIG. 6) showing the absorbent article 100 according to the second embodiment.

  As shown in FIG. 8, the absorbent body 30 includes a functional absorbent body 310, a wearer-side absorbent body 320, and a non-wearer-side absorbent body 330.

(2-1) Functional Absorber The functional absorber 310 is in the form of a sheet to which pressure is applied after sandwiching the mixture 311 between the two exterior sheets 312 as in the first embodiment. The basis weight of the exterior sheet 312 is, for example, 13 to 16 g / m ² .

(2-2) Wearer-side absorbent body The wearer-side absorbent body 320 is composed of 80% of the same pulp as the absorbent pulp, 17% of PE / PET core-sheath fiber having a fiber length of 7 mm and a fineness of 1.7 dtex. And crepe paper composed of 3% cationized starch. For example, the basis weight of the wearer side absorbent body 320 is 30 g / m ² .

(2-3) Non-wearer-side absorbent body The non-wearer-side absorbent body 330 absorbs and holds body fluid from the wearer (a so-called main body absorbent sheet). The non-wearer side absorber 330 is disposed on the non-wearer side of the functional absorbent body 310 and the wearer side absorbent body 320, that is, between the back sheet 20 and the functional absorbent body 310. The non-wearer side absorbent body 330 is joined to the topsheet 10 by a plurality of embosses 66A, 66B joined by at least a part of the absorbent body 330 being compressed. Moreover, the non-wearer side absorber 330 is joined to the back surface sheet 20 by a hot melt adhesive or the like.

The density of the non-wearer side absorber 330 is 5.5 to 3.0 g / m ³ , and particularly preferably 0.6 to 2.0 g / m ³ . The non-wearer side absorbent body 330 wraps the pulverized pulp 331 mixed with the superabsorbent polymer with the wrapping sheet 332.

The thickness of the pulverized pulp 331 is 0.15 to 0.7 mm, and particularly preferably 0.2 to 0.6 mm. The basis weight of the pulverized pulp 331 is 300 to 500 g / m ² in the arrangement region of the functional absorber 310. Note that the pulverized pulp 331 may be subjected to a crepe treatment or the like. Examples of the pulverized pulp 331 include air-laid pulp and wet pulp nonwoven fabric as in the case of absorbent pulp.

The basis weight of the enclosing sheet 332 is, for example, 15 g / m ² . In addition, the fabric weight of area | regions other than the area | region where the functional absorber 310 in the non-wearer side absorber 330 is arrange | positioned is 180-250 g / m < ² >, It is especially preferable that it is 190-210 g / m < ² >. For example, examples of the encapsulating sheet 332 include air-through nonwoven fabric, point bond nonwoven fabric, and tissue.

(3) Manufacturing method of absorbent article Next, the manufacturing method of the absorbent article 100 which concerns on 2nd Embodiment is demonstrated, referring drawings. FIG. 9 is a diagram illustrating a method for manufacturing the absorbent article 100 according to the second embodiment.

  The manufacturing method of the absorbent article 100 includes each member forming step, a first joining step, a second joining step, a third joining step, a fourth joining step, a fifth joining step, and a sixth joining step. Including.

(3-1) Each member shaping | molding process In each member shaping | molding process, the surface sheet 10, the side sheet 40, the back surface sheet 20, and the absorber 30 are shape | molded. For example, when the non-wearer side absorbent body 330 is formed, the non-wearer side absorbent body 330 is formed by wrapping the pulverized pulp 331 with the wrapping sheet 332.

(3-2) 1st joining process As shown to Fig.9 (a), in the 1st joining process, the surface sheet 10 and the wearer side absorber 320 are joined by the some embossing 60 of dot shape. Specifically, a part of the surface on the wearer side absorbent body 320 side in the topsheet 10 and a part of the surface on the topsheet 10 side of the wearer side absorbent body 320 are joined.

  In addition, the space | interval S1 in the some embossing 60 to which the surface sheet 10 and the wearer side absorber 320 are joined is the some by which the pressure treatment was performed to the functional absorber 310 (functional material and exterior sheet | seat). It is larger than the interval S2 between the embosses 63 (see FIG. 7). That is, the ratio of the surface area of the plurality of embosses 60 to the surface area of the wearer-side absorber 320 is preferably smaller than the ratio of the surface area of the plurality of embosses 63 to the surface area of the functional absorber 310.

(3-3) Second Joining Step As shown in FIG. 9B, in the second joining step, the top sheet 10 and the side sheet 40 are joined by a plurality of embosses 67. Specifically, a part of the surface of the surface sheet 10 on the side sheet 40 side and a part of the surface of the side sheet 40 on the surface sheet 10 side are joined.

  The topsheet 10 and the sidesheet 40 do not necessarily have to be joined by the plurality of embosses 67, and may be joined intermittently by a hot melt adhesive or the like, for example.

(3-4) Third Joining Process As shown in FIG. 9C, in the third joining process, the functional absorbent body 310 and the non-wearer side absorbent body 330 are joined by the plurality of embosses 68. Specifically, a part of the non-wearer side absorber 330 side surface of the functional absorber 310 (exterior sheet 312) and a part of the non-wearer side absorber 330 side surface of the functional absorber 310 side. And are joined.

  The functional absorbent body 310 and the non-wearer side absorbent body 330 do not necessarily have to be joined by the plurality of embosses 68, and may be joined intermittently by a hot melt adhesive or the like, for example.

(3-5) Fourth Joining Process As shown in FIG. 9D, in the fourth joining process, the functional absorbent body 310 and the wearer-side absorbent body 320 are joined by a hot melt adhesive or the like. Specifically, a part of the surface on the wearer side absorbent body 320 side in the functional absorbent body 310 (exterior sheet 312) and a part of the surface on the functional absorbent body 310 side of the wearer side absorbent body 320 are. Be joined.

(3-6) Fifth Joining Step As shown in FIG. 9 (e), in the fifth joining step, the topsheet 10 and the non-wearer side absorber 330 are joined by the plurality of embosses 66A and 66B described above. The Specifically, the surface sheet in the non-wearer side absorbent body 330 in which a part of the surface of the top sheet 10 on the non-wearer side absorbent body 330 side and the functional absorbent body 310 and the wearer side absorbent body 320 are joined. Part of the 10 side surface is joined. The plurality of embosses 66A and 66B are formed at positions excluding the arrangement region of the functional absorber 310.

(3-7) Sixth Joining Step As shown in FIG. 9 (f), in the sixth joining step, the side part of the topsheet 10 and the non-wearer side absorber 330 and the backsheet 20 are hot melt bonded. Joined by materials etc. Specifically, a part of the surface of the top sheet 10 and the non-wearer side absorber 330 on the back sheet 20 side and a part of the surface of the top sheet 10 in the back sheet 20 are joined.

(Action / Effect)
According to the absorbent article 100 according to the second embodiment, as in the case of the function and effect of the first embodiment, when a functional material that provides an additional function such as a deodorizing function or an antibacterial function is provided, an additional function is provided. Can be reliably exhibited and rewet can be suppressed.

[Other Embodiments]
Although the contents of the present invention have been disclosed through the embodiments of the present invention as described above, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  For example, the embodiment of the present invention can be modified as follows. Specifically, although the surface sheet 10 has been described as being larger than the absorbent body 30, the surface sheet 10 is not limited to this and may of course have the same size as the wearer-side absorbent body 320.

  The functional material has been described as a Chinese herbal medicine material, but is not limited to this, and is not particularly limited as long as it is a material having an additional function (for example, a deodorizing function, an antibacterial function, an aroma function, a heat retaining function). There is no. Examples of functional materials include mugwort, beetle, tea, mint, shiso, chili, turmeric, lavender, thyme, tea tree, aloe, etc., dried natural plants, and the like. Furthermore, examples of the functional material include organic or inorganic compound particles having antibacterial properties such as benzalkonium chloride and cetylpyridinium chloride (CPC).

  The functional absorbent 310 has been described as being formed by sandwiching the mixture 311 between the exterior sheets 312, but is not limited thereto, and may be formed so as to wrap the mixture 311 with the exterior sheets 312. Good. In this case, it is preferable that the end portions in the width direction WD of the exterior sheet 312 are provided so as to overlap each other on the non-wearer side absorber 330 side. In addition, the functional absorber 310 may be one in which the mixture 311 is partially disposed on the exterior sheet 312 and covered with the exterior sheet 312. For example, the mixture 311 may be arranged in a stripe shape or a dot shape on the exterior sheet 312 and covered with the exterior sheet 312. The functional absorber 310 may of course be a sheet formed by infiltrating a functional material (Chinese medicine material) into a predetermined sheet and drying it.

  About the manufacturing method of the absorbent article 1,100, if manufacture of the absorbent article 1,100 of this invention is possible, there will be no restriction | limiting in particular about an order.

  The absorbent body 30 (particularly the functional absorbent body 310 and the wearer side absorbent body 320) has been described as being provided on a panty liner or sanitary napkin, but is not limited thereto, and is for adults or children. It can be applied to various articles that absorb liquid, such as diapers. For example, the absorber 30 may of course be provided on a cloth napkin.

  As described above, the present invention naturally includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

[Comparison evaluation]
Hereinafter, in order to further clarify the effects of the present invention, the results of tests performed using absorbent articles according to the following comparative examples and examples will be described. Specifically, (1) diffusivity evaluation, (2) water retention evaluation, (3) liquid return evaluation, and (4) comprehensive evaluation will be described.

  Here, the configurations of the absorbent articles according to Comparative Examples 1 and 2 and Examples 1 and 2 are as shown in Table 1. In addition, this invention is not limited at all by these examples.

(1) Diffusion evaluation Diffusion evaluation was performed under the conditions of Comparative Examples 1 and 2 and Examples 1 and 2 shown in Table 1 by preparing three samples each having a size of 25 mm x 150 mm. The diffusivity of each absorbent article was measured by the water absorption rate (Birec method) defined in “Water absorption test method”.

  Specifically, as shown in FIG. 10, each sample is immersed by 10 mm in a petri dish containing a liquid (so-called artificial urine). The liquid is formed by tap water, physiological saline (0.9% NaCl), edible oil and colorant (oil; oil red, water; edible blue).

  In each absorbent article, the height H1 of the liquid rising in the longitudinal direction LD of each absorbent article shown in FIG. 10 (a) and the liquid rising in the width direction WD of each absorbent article shown in FIG. 10 (b). The height H2 was measured. The height at which the liquid ascends was measured every 10 seconds up to 60 seconds, and then every 30 seconds up to 300 seconds.

  As a result, as shown in Table 2, the absorbent article according to Examples 1 and 2 has a smaller numerical value than the absorbent article according to Comparative Example 1 with only the functional absorber, and therefore the diffusibility is small. I understand. In addition, the absorptive article concerning comparative example 2 is too small in diffusibility compared with other absorptive articles.

(2) Water retention evaluation Water retention evaluation prepares each sample of 60 mm x 60 mm under the conditions of Comparative Examples 1 and 2 and Examples 1 and 2 shown in Table 1, and measures the weight of each sample. Then, each sample is placed on a mesh-like wire net and immersed in a liquid (so-called artificial urine) placed in a tray for 3 minutes. The sample was pulled up together with the wire mesh, and the liquid of each sample was lightly cut and allowed to stand for 5 minutes. Thereafter, the weight of the wire mesh and the sample and the weight of the wire mesh are measured. In addition, each sample is placed on a sample stage, and an 840 g weight is placed thereon and left for 3 minutes. Then, the weight of each sample before the test and the weight after the test are compared.

  As a result, as shown in Table 3, it can be seen that the absorbent article according to Example 1 is superior in water retention because the absorbent article is heavier than the absorbent articles according to Comparative Examples 1 and 2. . It turns out that the absorbent article which concerns on Example 2 is the water retention property equivalent to the comparative example 1 only of a functional absorber.

(3) Liquid return evaluation The rewetting evaluation was performed under the conditions of Comparative Example 2 and Example 1 shown in Table 1 with a functional absorber of 60 mm × 30 mm and a wearer side absorber of 150 mm × 70 mm by hot melt. Each sample was prepared by bonding. As shown in FIG. 11, a liquid (so-called artificial blood (1.0 mm)) was dropped onto the center of the wearer-side absorber and left for 3 minutes. And the dimension (henceforth a spreading | diffusion dimension) of the liquid which spread | diffused on the non-wearer side absorber and the wearer side absorber from the side which dripped the liquid was measured. The liquid is formed by tap water and physiological saline (0.9% NaCl).

Thereafter, filter paper was placed on each sample, and a weight (pressure) was applied for 3 minutes with a copper scale (20 g / cm ² ). And the diffusion dimension of the non-wearer side absorber after a weight was added for 3 minutes, and the wearer side absorber were measured.

  As a result, as shown in Table 4, before and after the scale is added, in the absorbent article according to Example 1, the diffusion dimensions of the wearer-side absorbent body and the functional absorbent body are not changed. . On the other hand, in the absorbent article which concerns on the comparative example 2, each diffusion dimension of a wearer side absorber and a functional absorber is increasing. Therefore, it was found that the absorbent article according to Example 1 does not have a small amount of liquid return from the functional absorbent to the wearer-side absorbent as compared with the absorbent article according to Comparative Example 2.

(4) Comprehensive evaluation As described above, the absorbent articles according to Examples 1 and 2 have less diffusibility of the non-wearer side absorbent body than the absorbent articles according to Comparative Examples 1 and 2, and the water retention is Since it was large, it was found that liquid return hardly occurred.

  In addition, since the absorbent article which concerns on the comparative example 1 is not provided with the wearer side absorber, even if it is a case where what is called a liquid return generate | occur | produces, it cannot absorb a liquid. In addition, the absorbent article according to Comparative Example 2 has low diffusibility, but also has low water retention, and thus it has been found that even when so-called liquid return occurs, the wearer-side absorber cannot absorb liquid. .

It is an upper surface expanded view (plan view) which shows the absorbent article 1 which concerns on 1st Embodiment. It is a disassembled perspective view which shows the absorbent article 1 which concerns on 1st Embodiment. It is sectional drawing (AA sectional drawing of FIG. 1) which shows the absorbent article 1 which concerns on 1st Embodiment. It is a figure which shows the manufacturing method of the absorbent article 1 which concerns on 1st Embodiment. It is sectional drawing which shows 1 A of absorbent articles which concern on the example of a change. It is an upper surface expanded view (plan view) which shows the absorbent article 100 which concerns on 2nd Embodiment. It is a disassembled perspective view which shows the absorbent article 100 which concerns on 2nd Embodiment. It is sectional drawing (BB sectional drawing of FIG. 6) which shows the absorbent article 100 which concerns on 2nd Embodiment. It is a figure which shows the manufacturing method of the absorbent article 100 which concerns on 2nd Embodiment. In comparative evaluation, it is a figure for demonstrating water retention evaluation. In comparative evaluation, it is a figure for demonstrating rewet evaluation.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A, 100 ... Absorbent article, 10 ... Top sheet, 20 ... Back sheet, 30 ... Absorber, 40 ... Side sheet, 50 ... Absorption area, 60-63, 65-68 ... Emboss, 70L, 70R ... Wing 310, functional absorber, 311 ... mixture, 312 ... exterior sheet, 320 ... wearer side absorber, 330 ... non-wearer side absorber, 331 ... pulverized pulp, 332 ... enveloping sheet

Claims (8)

A liquid-permeable surface sheet provided on the wearer side;
A back sheet provided on the non-wearer side than the top sheet;
A functional absorber including a functional material that is provided between the top sheet and the back sheet, and that provides at least an additional function, in the central portion of the absorbent article corresponding to the body fluid outflow location from the wearer; An absorbent article comprising:
Provided on the wearer side of the functional absorber, larger than the functional absorber, and comprising a wearer side absorber covering the functional absorber,
The diffusion of the body fluid in the wearer's side absorber is configured to small Kunar so than the diffusion of the body fluid in the functional absorbent,
The top sheet and the wearer-side absorber are joined by a plurality of first joining parts joined by being compressed at least partially,
The functional absorbent has a plurality of second compression parts joined by being compressed at least partially,
The interval between the first joint portions is configured to be wider than the interval between the second compression portions,
The said additional function is an absorbent article which is a deodorizing function, an antibacterial function, an aroma function, or a heat retention function .   2. The absorbent article according to claim 1, wherein the functional absorbent body is in the form of a sheet joined by applying pressure after the functional material is covered with an exterior sheet and compressing at least a part thereof.   The absorptive article according to claim 1 or 2 with which water retention of said wearer side absorber is larger than water retention of said functional absorber. The absorptivity as described in any one of Claims 1 thru | or 3 further provided with the non-wearer side absorber which is provided in the non-wearer side of the said functional absorber, and absorbs the said bodily fluid from the said functional absorber. Goods. The absorptive article according to any one of claims 1 to 4 in which said functional absorber and said wearer side absorber are joined by hot melt adhesive. The absorptive article according to any one of claims 1 to 5 in which said functional absorber is constituted by said functional material and absorptive pulp. The absorptive article according to any one of claims 1 to 6, wherein the functional material is a herbal medicine or a traditional Chinese medicine material containing at least one of Kayoko and Toki.   As the functional material, mugwort, beetle, tea, mint, shiso, chili, turmeric, lavender, thyme, tea tree, aloe, dried natural plant, or antibacterial The absorbent article according to any one of claims 1 to 6, wherein organic or inorganic compound particles are used.

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