JP4889276B2 - Absorbent articles - Google Patents

Absorbent articles Download PDF

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JP4889276B2
JP4889276B2 JP2005298377A JP2005298377A JP4889276B2 JP 4889276 B2 JP4889276 B2 JP 4889276B2 JP 2005298377 A JP2005298377 A JP 2005298377A JP 2005298377 A JP2005298377 A JP 2005298377A JP 4889276 B2 JP4889276 B2 JP 4889276B2
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part
front
rear
absorber
absorbent body
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JP2007105198A (en
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哲哉 草川
進介 長原
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花王株式会社
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Description

  The present invention relates to an absorbent article, particularly an absorbent article such as a sanitary napkin or an incontinence pad.

DESCRIPTION OF RELATED ART Conventionally, absorbent articles, such as a sanitary napkin which contact | abuts from a user's excretion part to a hip part, are known. This type of absorbent article is used when the amount of body fluid excreted is large or when the usage time is long, such as at night. In the mounted state from the excretion part to the hip part of the absorbent article, the cross-sectional shape in the longitudinal direction is relatively flat at the part in contact with the crotch part near the excretion part, but is in contact with the hip part. In the portion, it is concavely curved toward the user's skin along the hip portion, and it is required to closely follow such a complex shape of the body with a single absorbent article. In addition, the cross-sectional shape in the width direction of the user's crotch has a shape that receives a compressive force from the right and left to the inside by the inside of the base of the user's thighs and is convexly curved toward the user's skin. . In this way, the crotch part where the cross-sectional shape in the width direction is convexly curved toward the user's skin, and the hip part where the cross-sectional shape in the longitudinal direction is curved concavely toward the user's skin Between these parts, it is difficult for the absorbent article to continuously follow the skin, and wrinkles extending in the width direction are likely to occur.
When such wrinkles occur, a gap may be generated between the skin contact surface of the absorbent article and the user's skin contact surface, which may cause side leakage.
Moreover, the absorbent article which has the structure isolate | separated into the front part and the back part in the longitudinal direction is proposed.

  For example, Patent Document 1 includes a front part and a rear part, and each of a rear end part of the front part and a front end part of the rear part has a V-shaped fitting end and can be joined complementarily. An absorbent article made in is disclosed.

  Further, in Patent Document 2, notches are formed on both side edges in the width direction of the absorber, and only the central part is continuous, which is possible due to the difference in rigidity between the part where the notch is formed and the part where there is no notch. An absorbent article having a flexible bending axis is disclosed.

JP-A-63-290565 JP-A-7-447

The absorbent article described in Patent Document 1 is separated into a front part and a rear part in the longitudinal direction, and although the aforementioned wrinkles are less likely to occur, the front part and the rear part are completely two. Therefore, the body fluid absorbed in the front part is not sufficiently moved to the rear part, and the rear part may not be able to fully exhibit the absorption performance.
In addition, each of the front part and the rear part is used by being fixed to the inner side of an underwear or the like by an adhesive part provided on the non-skin contact surface side, but the integrity as an absorbent article is Only given by joining the V-shaped fitting ends. Therefore, for example, when an adhesive part with the underwear etc. on the non-skin contact surface side in the front part is removed, there is a possibility that the mounting position of the front part is shifted and the excreted body fluid is not properly absorbed.

  The absorbent article described in Patent Document 2 has a notch on the side edge of the product, and although it is difficult to occur even if it is wrinkled by the wrinkles described above, it is a continuous absorber structure in the center portion, so a gap due to the notch Is not buried at the time of wearing, inhibits the diffusion of the liquid in the absorber, and has a structure that cannot exhibit sufficient absorption performance. In addition, since the liquid easily accumulates at the notch portion, the liquid easily leaks from the end of the absorbent article.

  Therefore, an object of the present invention is to prevent the generation of wrinkles by preventing the influence of the curvature of the crotch part from being applied rearward at the time of wearing, and the body fluid absorbed in the crotch part can move backward. It is to provide an absorbent article.

  The present invention comprises a top sheet, a back sheet, and an absorbent body interposed between both sheets, and is a substantially vertically long absorbent article, wherein the absorbent body is formed of a front absorbent body and a rear absorbent body. The front absorbent body has both rear side portions extending rearward from the central portion thereof, and the rear absorbent body has a front central portion extending forward from the both side portions thereof. The above object is achieved by providing an absorbent article in which the central portion of the rear portion of the front absorbent body and the central portion of the front portion of the rear absorbent body overlap each other.

  According to the absorbent article of the present invention, it is possible to prevent the occurrence of wrinkles by preventing the influence of the curvature of the crotch part from being attached to the back at the time of wearing, and the body fluid absorbed in the crotch part moves backward. Can do.

  Hereinafter, preferable this embodiment of the absorbent article of this invention is described, referring FIGS. 1-5.

The absorbent article 1 of the present embodiment is a sanitary napkin, and is interposed between a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3 and both sheets as shown in FIGS. The liquid-retaining absorbent body 4 is provided and is substantially vertically long.
Moreover, the absorber 4 in the napkin 1 of this embodiment is formed from the front absorber 41 and the back absorber 42, as shown in FIG. 1, and the front absorber 41 is the both sides 41B of the rear part, 41B extends rearward from the central portion 41A, and the rear absorber 42 has a front central portion 42A that extends forward from both side portions 42B and 42B, and a rear central portion of the front absorber 41. The portion 41A and the front central portion 42A of the rear absorber 42 overlap each other.

The absorbent body 4 in the napkin 1 according to the present embodiment will be further described. As shown in FIG. 1, the front absorbent body 41 has a front part A in the longitudinal direction and an excretory part-facing part that is the longitudinal central area. Front part A when it is divided into B (part having an excretion part facing region disposed in the center in the width direction) disposed opposite to the user's liquid excretion part and rear part C (part disposed to face the user's hip part) To the excretory part facing part B, and the rear absorber 42 is disposed from the excretion part facing part B to the rear part C.
The border between the rear side portions 41B and 41B of the front absorbent body 41 and the front side portions 42B and 42B of the rear absorbent body 42 abuts near the front side of the user's hip.

The width of the front absorber 41 is substantially constant in the longitudinal direction. As shown in FIG. 1, the planar shapes of the rear part and the front part of the front absorbent body 41 are convexly curved forward.
As shown in FIG. 1, the planar shape of the front portion of the rear absorbent body 42 is such that the central portion 42 </ b> A extends forward in a convex manner, and a convex portion 43 is formed. The convex portion 43 gradually decreases in width toward the front, and is tapered. In the rear absorbent body 42, the portion excluding the convex portion 43 is located at the rear part C of the napkin 1, and the width thereof is substantially the same as the width of the front absorbent body 41. The planar shape of the rear part of the rear absorber 42 is convexly curved rearward.

When the absorber 4 is viewed in plan, gaps 44 are provided between the front absorber 41 and the rear absorber 42 on both sides of the convex portion 43 as shown in FIG.
When the napkin 1 is worn, the absorbent body 4 bends in the longitudinal direction along the user's skin. At this time, the size of each of the pair of gap portions 44 and 44 is such that the rear end of the front absorber 41 and the front end of the rear absorber 42 are in contact with each other, and the pair of gap portions 44 and 44 are almost lost. And it is preferable that it is provided in a shape in order to prevent wrinkles from occurring in the absorbent body 4. Further, when the napkin 1 is attached, the pair of gaps 44 and 44 are almost lost, so that the absorbability of the napkin 1 is not impaired.
Furthermore, even when the napkin 1 is individually wrapped, if the napkin 1 is folded in the longitudinal direction at the position of the gap portion 44, the workability is good, and the occurrence of wrinkles of the topsheet 2 at the time of mounting can be suppressed. Moisture on the rear side can be prevented.

As shown in FIGS. 2 and 3, the convex portion 43 in the front center portion 42 </ b> A of the rear absorber 42 overlaps the lower side of the rear center portion 41 </ b> A of the front absorber 41. Middle and high portions are formed. In the present embodiment, the convex portion 43 of the rear absorbent body 42 overlaps the front absorbent body 41 over substantially the entire length of the excretory part facing portion B of the napkin 1.
The napkin 1 of the present embodiment is formed from two separated front absorbers 41 and rear absorbers 42, but the body fluid absorbed by the front absorber 41 in the excretory part opposing part B passes through the convex part 43. Thus, the rear absorber 42 moves to the rear absorber 42 so that the absorption performance of the rear absorber 42 is fully utilized.

Each of the front absorber 41 and the rear absorber 42 is partially joined to the back sheet 3. Specifically, as shown in FIG. 4, the front absorbent body 41 and the back sheet 3 are bonded by hot-melt adhesives 7 and 7 that are spirally coated on both sides in the longitudinal direction of the front absorbent body 41. Yes. The front absorbent body 41 and the back sheet 3 are not bonded at the front and rear ends of the front absorbent body 41.
The rear absorbent body 42 and the back sheet 3 are similarly bonded at the center in the width direction of the rear absorbent body 42. The convex portion 43 is bonded to the back sheet 3, and the rear end portion of the rear absorbent body 42 is not bonded to the back sheet 3.

Thus, the front absorbent body 41 is bonded to the back sheet 3 at both sides in the longitudinal direction and is not bonded to the back sheet 3 at the center, so that when the napkin 1 is worn, The cross-sectional shape of the front absorbent body 41 in the width direction is easily bent convexly toward the user's skin side, and the adhesion to the skin is enhanced.
Moreover, since the center part of the width direction of the back absorber 42 is adhere | attached with the back surface sheet 3, and the both sides of the longitudinal direction are not adhere | attached with the back surface sheet 3, when a napkin 1 is mounted | worn, a user's Along the hip portion, the longitudinal cross-sectional shape of the rear absorbent body 42 is easily bent concavely toward the user's skin side, and the adhesion to the skin is enhanced.
Since the absorber 4 has the front absorber 41 and the rear absorber 42 bonded to each other via the back sheet 3 and has an overlapping portion of the absorbers 41 and 42, it is integrated as a member. have.

Further, since the rear central portion 41A of the front absorbent body 41 and the convex portion 43 of the front central portion 42A of the rear absorbent body 42 are not joined, when the napkin 1 is worn, The cross-sectional shape of the absorbent body 41 in the width direction is more likely to be a convexly curved shape toward the user's skin.
When the rear absorbent body 42 is concavely curved toward the user's skin, a slight slip occurs between the convex part 43 and the front absorbent body 41, but the front absorbent body 41 and the convex part 43. It is preferable that this is not hindered from slipping. As a result, wrinkles are not generated in the absorber 4.

As shown in FIGS. 1 and 2, the front absorbent body 41 and the rear absorbent body 42 and the top sheet 2 are partially joined together by an embossed groove 5 by heat sealing, and the embossed groove 5 is formed by the front absorbent body. 41 is provided so as to surround a portion where the rear central portion 41A and the front central portion 42A of the rear absorber 42 overlap. The embossed groove 5 is a substantially oval annular shape whose overall shape is closed, and is provided from the front part A to the rear part C in the longitudinal direction of the napkin 1. Both side portions of the embossed groove 5 in the longitudinal direction have a shape in which three portions that are convexly curved outward in the width direction of the napkin 1 are connected.
Each of the front absorbent body 41 and the rear absorbent body 42 is joined by the topsheet 2 and the embossed groove 5 so that it does not shift in the width direction. Moreover, the front absorber 41 and the back absorber 42 are joined via the surface sheet 2, and the integrity as the absorber 4 is further improved.

The napkin 1 of the present embodiment will be further described. Each of the top sheet 2 and the back sheet 3 has a substantially elliptical shape in plan view as shown in FIG. As shown in FIG. 3, both side portions of the top sheet 2 in the longitudinal direction extend from both side edges of the absorber 4, are wound down between the back sheet 3, and are joined to the back sheet 3.
As shown in FIGS. 1 and 2, both end portions in the longitudinal direction of the top sheet 2 and the back sheet 3 are extended from both end edges in the longitudinal direction of the absorber 4, and are joined by a known joining method such as heat sealing. ing.
As shown in FIG. 1, the pair of wing parts 6, 6 is formed by extending the back sheet 3 from both side edges of the top sheet 2. Moreover, the slip prevention material for fixing the napkin 1 to a user's shorts etc. is apply | coated to the outer surface of the back surface sheet 3 and a pair of wing parts 6 and 6. FIG. The slip stopper is covered with a release paper and is protected until use.

The length of the front absorbent body 41 in the napkin 1 of the present embodiment is preferably 160 to 250 mm, and particularly preferably 195 to 215 mm. Moreover, it is preferable that the length of the back absorber 42 is 130-270 mm, and it is especially preferable that it is 235-255 mm.
In the rear part of the front absorbent body 41, the distance L1 (see FIG. 1) between the front end and the rear end of the front curved portion is measured along the longitudinal direction of the napkin 1 is 30. It is preferably ˜70 mm, particularly preferably 40 to 60 mm.
Further, in the rear absorbent body 42, with respect to the length L2 of the convex portion 43 (see FIG. 1), the distance measured along the longitudinal direction of the napkin 1 from the base portion to the distal end of the convex portion 43 is 70 to 140 mm. It is preferable that it is 110 to 130 mm. In the present embodiment, the base portion of the convex portion 43 is a portion inside the embossed groove 5 in the front central portion 42 </ b> A of the rear absorber 42. Further, the distance measured along the width direction of the napkin 1 of the width W (see FIG. 1) of the base of the convex portion 43 is preferably 10 to 40 mm, and particularly preferably 20 to 30 mm.
Furthermore, the distance which measured the length L3 (refer FIG. 1) of the part which 41A of center parts of the rear part in the front absorber 41 and the convex part 43 of the back absorber 42 have overlapped along the longitudinal direction of the napkin 1 is 40 to 100 mm, preferably 80 to 100 mm. In addition, in the overlapping part of the rear absorbent body, it is possible to increase the capillary force and rigidity of the absorbent body by performing a partial consolidation process such as a pin embossing process. It is preferable from the viewpoint of improving the adhesion.

The members constituting the napkin 1 of the present embodiment will be described. As the forming materials of the front absorbent body 41 and the rear absorbent body 42 forming the absorbent body 4, various materials used in conventional absorbent articles and the like. In particular, long fibers such as softwood pulp, chemically treated synthetic pulp, and cellulose tow are preferable. Further, as a material for forming the absorbent body 4, in addition to a pulp material, a polymer-absorbing polymer, a synthetic fiber made of polyester or polypropylene, a heat-fusible fiber, or rayon can also be used. As a material for forming the absorbent body 4, it is also preferable to use a mixture of pulp material and other materials.
The pulp material forming the front absorbent body 41 and the pulp material forming the rear absorbent body 42 may be different. For example, the fact that the front absorbent body 41 is made of pulp fibers and the rear absorbent body 42 is made of synthetic fibers emphasizes the absorbability in front of the absorbent body 4 and emphasizes the fit in the rear. Preferred above.
Each of the front absorbent body 41 and the rear absorbent body 42 is preferably wrapped and integrated with a mount or the like, or synthetic fibers are mixed to enhance the integrity.

In the wearing state of the napkin 1 of the present embodiment, the shape of the absorbent body 4 in the longitudinal direction is toward the user's skin from the front end portion to the front portion A of the excretory portion facing portion B as shown in FIG. Curved concavely, the central part of the excretory part facing part B is relatively flat, and from the rear end part to the rear part C of the excretory part facing part B, it is greatly curved concavely toward the user's skin. .
The absorbent body 4 receives a compressive force in the width direction from the left and right by the inner base of the user's thighs at the crotch part of the user near the excretory part facing part B, and the cross-sectional shape in the width direction is It has a shape that curves convexly toward the skin. If the absorbent body is formed from one member, the shape of the convex curve at the crotch part inhibits the formation of the concave curve shape at the hip part, and abuts the crotch part. A wrinkle extending in the width direction is generated between the portion that is in contact with the hip portion.
Thus, when the absorbent body is formed from one member, there is a limit to keeping the absorbent body in close contact with the three-dimensional shape of the user's skin, and wrinkles occur. Therefore, in the present embodiment, the absorbent body 4 is divided into two parts in the front and the back so that the influence of the convex curve of the front absorbent body 41 is not transmitted to the rear absorbent body 42 and is excellent in the absorbent body 4 with the divided portion as an axis. Flexibility is given. Each of the front absorbent body 41 and the rear absorbent body 42 is adapted to fit the curvature of the body and to come into close contact with the skin using the bending of the absorbent body.

According to the napkin 1 of the present embodiment described above, the absorbent body 4 is formed of the front absorbent body 41 and the rear absorbent body 42 so that the absorbent body 4 is not wrinkled when the napkin 1 is mounted. It has been made and leakage resistance is enhanced.
Further, the bodily fluid absorbed by the front absorbent body 41 passes through the overlapping portion of the front absorbent body 41 and the convex portion 43 of the rear absorbent body 42 and moves to the rear absorbent body 42, so that excellent absorption retention is achieved. It has sex.

  Next, the napkin 1 of 2nd Embodiment is demonstrated, referring FIG. Regarding the second embodiment, the description in detail regarding the first embodiment is applied as appropriate to points that are not particularly described. Moreover, in FIG. 6, the same code | symbol is attached | subjected to the same member as FIGS.

In the napkin 1 of the second preferred embodiment of the present invention, as shown in FIG. 6, the overlapping portion of the rear central portion 41A of the front absorbent body 41 and the front central portion 42A of the rear absorbent body 42 is as shown in FIG. Less than in the previous embodiment. About another structure, it is the same as that of previous embodiment.
In the napkin 1 of this embodiment, the length of the convex part 43 in the front part of the back absorber 42 is shorter than that of the previous embodiment, which is preferable in terms of adhesion to the user's body.
The napkin 1 of the present embodiment is preferably used when, for example, the amount of body fluid excreted is not relatively large.

According to the napkin 1 of this embodiment mentioned above, the effect similar to embodiment mentioned above is acquired. In addition, since there are few overlapping portions of the front absorbent body 41 and the rear absorbent body 42, it is difficult to give back the influence of the curvature of the crotch at the time of wearing, so that the generation of wrinkles is suppressed.
In addition, a diaper is not contained in the absorbent article of this invention mentioned above.

The napkin which is the absorbent article of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist of the present invention.
For example, the absorbent article of the present invention may be a sanitary napkin or a female incontinence pad.
The description omission part in one embodiment mentioned above and the part which only one embodiment has can mutually be utilized suitably.

FIG. 1 is a partially broken plan view showing a first embodiment of an absorbent article of the present invention. 2 is a cross-sectional view taken along line XX of FIG. FIG. 3 is a cross-sectional view taken along line YY of FIG. FIG. 4 is a partially broken plan view showing an adhesive portion between the absorbent body and the back sheet in the absorbent article according to the first embodiment. FIG. 5 is a perspective view illustrating a curved state of the absorbent body when the absorbent article according to the first embodiment is mounted. FIG. 6 is a partially broken plan view showing a second embodiment of the absorbent article of the present invention.

Explanation of symbols

1 Sanitary napkin (absorbent article)
2 Top sheet 3 Back sheet 4 Absorber 41 Front absorber 41A Center part in the width direction at the rear end part 41B Both end parts in the width direction at the rear end part 42 Back absorber 42A Center part in the width direction at the front end part 42B In the front end part Both ends in the width direction 44 Cavity 43 Projection 5 Embossed groove 6 Wing 7 Hot melt adhesive A Front part B Excretion part opposing part C Rear part

Claims (4)

  1. It comprises a top sheet, a back sheet and an absorbent body interposed between both sheets, and is a substantially longitudinal sanitary napkin ,
    In the longitudinal direction of the sanitary napkin, the sanitary napkin is divided into an anterior portion, an excretory portion facing portion and a posterior portion which are the longitudinal central region,
    The absorber is formed of a front absorber and a rear absorber,
    The front absorber is arranged from the front part to the excretion part facing part, and the rear absorber is arranged from the excretion part facing part to the rear part,
    Each of the front absorber and the rear absorber is partially joined to the back sheet,
    The front absorbent body has rear side portions extending rearward from the central portion thereof,
    The rear absorber has a front central portion extending forward from both sides thereof,
    The planar shape of the front part of the rear absorbent body is such that the central part extends greatly forward and the convex part is formed at the central part of the front part, and the convex part is directed forward. Gradually narrower and tapered,
    The center part of the rear part in the front absorber and the center part of the front part in the rear absorber overlap ,
    When the absorber is viewed in plan, a gap is provided on each side of the convex portion between the front absorber and the rear absorber,
    The sanitary napkin in which the convex part of the central part of the front part of the rear absorbent body overlaps the lower side of the central part of the rear part of the front absorbent body.
  2. The front absorbent body and the back sheet are joined at both sides in the longitudinal direction of the front absorbent body,
    Wherein the rear absorbent body and the backsheet, the sanitary napkin according to claim 1, wherein is joined at the central portion in the width direction of the aft absorber.
  3. The sanitary napkin according to claim 1 or 2 , wherein a central part of the rear part of the front absorbent body and a central part of the front part of the rear absorbent body are not joined.
  4. Each of the front absorbent body and the rear absorbent body and the top sheet are partially joined by an embossed groove,
    The said embossing groove | channel is provided in any one of Claims 1-3 provided so that the part which the center part of the rear part in the said front absorber and the center part of the front part in the said back absorber overlap may overlap. The sanitary napkin as described.
JP2005298377A 2005-10-13 2005-10-13 Absorbent articles Active JP4889276B2 (en)

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