JP6103366B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article having improved fit to an inner thigh depression or a back thigh depression.

  When the thigh is thinned, the shape of the adductor muscle appears on the surface, and the surface of the thigh produces a ridge-like bulge portion due to the adductor muscle (hereinafter referred to as the adductor bulge portion). Indentations are created on both the front and rear sides (front and back of the inner thigh) of the part. Such a tendency is conspicuous in elderly people, especially those who are bedridden, those who cannot let go of wheelchairs, or those who cannot change their body orientation and position.

  The conventional absorbent article is designed to secure the fit around the legs by means of a three-dimensional gather, but sufficient fit is obtained for the above adductor bulge and the depressions before and after that. In some cases, leakage from around the legs occurred.

  As a technique for solving this problem, the technique of Patent Document 1 has also been proposed, and this prior art is far superior to three-dimensional gathers, but it is said to be fit to the adductor bulge and its front and rear depressions. In terms, there is room for improvement.

JP 2011-194152 A JP 2008-161251 A

  Then, the main subject of this invention is improving the fit property with respect to the adductor bulge protruding part and the hollow before and behind that.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
In an absorbent article having a front side portion and a rear side portion extending respectively to the front side and the rear side of the crotch part,
A main absorber is provided from the front part to the rear part,
On this main absorber, there is a linear easy-bending portion along the adductor bulge portion and facing the region from the depression on the front side of the adductor bulge portion to the recess on the rear side of the adductor bulge portion Absorber for inner thigh fit is provided,
An absorbent article characterized by the above.

(Function and effect)
The present invention opposes a region on the main absorbent body from the depression on the front side of the adductor bulge portion to the depression on the rear side of the adductor bulge portion and linearly bends along the adductor bulge portion. It is characterized in that it is provided with an inner thigh-fit absorber having a portion. At the time of wearing, the inner thigh fitting absorber can be bent at the easy-bending part to pinch the adductor bulge, and not only the adductor bulge but also the anteroposterior depressions are absorbed. The body will fit tightly. Therefore, it is possible to more effectively prevent leakage due to the adductor bulge portion and the depressions before and after that.

<Invention of Claim 2>
The absorbent article according to claim 1, wherein the inner thigh-fitting absorbent body extends from a width direction inner side to a width direction outer side of a side edge of the main absorbent body.

(Function and effect)
In this way, the inner thigh-fit absorber extends from the inner side in the width direction to the outer side in the width direction of the side edge of the main absorbent body than the side edge of the main absorbent body in the inner thigh fit absorber. This is preferable because the outer side is not only easily deformed along the inner thigh but also elastically pressed against the inner thigh.

<Invention of Claim 3>
The said inner thigh fitting absorber has a rear end portion in a region on the front side of the easily bendable portion and a front end portion in a region on the rear side of the easily bendable portion are raised on the surface side. Absorbent articles.

(Function and effect)
Accordingly, it is preferable that the vicinity of the front and rear of the easily bent portion is raised because the raised portion fits firmly into the depressions before and after the adductor ridge.

<Invention of Claim 4>
The absorbent article according to any one of claims 1 to 3, wherein the inner thigh fitting absorbent body is provided independently on the left and right.

(Function and effect)
Absorber for inner thigh fit can be a left and right continuous structure, but by making the left and right independent structure, the flexibility of the crotch part is not impaired, and it follows the shape and movement of each foot independently Therefore, the fitting property to the adductor bulge portion and the depressions before and after the adductor muscle is further improved.

<Invention of Claim 5>
Three-dimensional gathers are not provided on both sides of the absorbent article on the front side of the rear end part of the absorbent body for inner thigh fitting,
The absorbent article according to any one of claims 1 to 4, wherein the easily bent portion does not reach a side edge of the absorbent body for inner thigh fitting.

(Function and effect)
The inner thigh fitting absorbent body extends in a direction intersecting with the three-dimensional gather. Therefore, in order to make the function effective, the front thigh fitting absorbent body is located in front of the rear end portion. It is desirable not to provide a three-dimensional gather. However, if the easy-bending part in the absorbent body for inner thighs reaches the side edge of the absorbent body for inner-thigh fitting without providing a three-dimensional gather, the easy-folding part serves as a passage to extract excrement. There is a fear. Therefore, as described above, it is desirable to adopt a structure in which the easily bent portion does not reach the side edge of the inner thigh-fitting absorber.

<Invention of Claim 6>
The said inner thigh fitting absorber is formed with a hollow portion that is recessed toward the center in the width direction at a position that intersects the side edge and the adductor bulge portion. Absorbent articles.

(Function and effect)
By having such a hollow part, the absorbent body for inner thigh fitting becomes easy to bend along an easily bendable part, and it becomes easy to maintain the broken state.

<Invention of Claim 7>
2. A raised elastic member for contracting in the front-rear direction at least one of the front side and the rear side of the easily bendable portion of the inner thigh fit absorber is provided on the back side of the inner thigh fit absorber. The absorbent article of any one of -6.

(Function and effect)
By having such a raised elastic member, at least one of the front side and the rear side of the easily bendable part in the absorbent body for inner thigh fitting is raised, and the raised part is a depression in front and rear of the adductor ridge raised part. It is preferable because it fits tightly.

<Invention of Claim 8>
The absorbent article according to any one of claims 1 to 7, wherein an elastic member for bending that contracts the absorbent body for inner thigh fit in a width direction is provided on a back side of the absorbent body for inner thigh fit. .

(Function and effect)
By having such an elastic member for bending, the absorbent body for inner thigh fitting is deformed along the inner thigh and is elastically pressed against the inner thigh, which is preferable.

<Invention of Claim 9>
The absorbent article according to claim 4, wherein a slit penetrating in the thickness direction is formed in the main absorbent body so as to overlap at least a part of a region between the left and right inner thigh fitting absorbent bodies.

(Function and effect)
By forming such a slit, the advantage that the absorbent body for the inner thigh fit is an independent structure on the left and right sides, that is, maintaining the flexibility of the crotch, independent follow-up to the shape and movement of each foot, and the adductor bulge portion And the fitting property with respect to the dents before and after that becomes even more.

  As described above, according to the present invention, advantages such as improved fitability to the adductor bulge and the front and rear depressions are provided.

It is a top view which shows the inner surface side of the expansion | deployment state of a pad type disposable diaper. It is a top view which shows only the principal part. It is (a) YY sectional drawing of FIG. 1, (b) ZZ sectional drawing. It is (a) XX sectional drawing of FIG. 1, (b) VV sectional drawing. It is a perspective view which shows the surface side of a mounting state. It is the figure which looked at the principal part of the mounting state from the lower part. It is a top view which shows the inner surface side of the expansion | deployment state of a pad type disposable diaper.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to an example of a pad-type disposable diaper shown in the accompanying drawings. The term “groin” in the terminology of the present invention means a part that corresponds to the crotch of the body at the time of use, and depending on the product, from the center in the front-rear direction of the article as shown in the figure to the predetermined part on the front side. Range, or a predetermined range at the center in the front-rear direction of the article. As shown in the figure, when there is a narrow constricted portion in the middle in the front-rear direction of the article or in the middle in the front-rear direction of the absorbent body, the “groin portion” is a predetermined front-rear direction with the minimum width portion of the constricted portion as the center in the front-rear direction Means range. Further, “front part (abdominal part)” means a part on the front side of the crotch part, and “rear part (back side part)” means a part on the rear side of the crotch part. In addition, the “slit” in the absorber means that a portion penetrating from the front surface to the back surface of the absorber extends in a direction along the surface with a predetermined width.

  1 to 4 show a pad-type disposable diaper example 200 according to the present invention. This pad-type disposable diaper 200 has a crotch portion C2, and a front portion F2 and a rear portion B2 extending on both front and rear sides thereof. The dimensions of each part can be determined as appropriate. For example, the total length L (length in the front-rear direction) of the diaper is about 350 to 700 mm, and the total width W1 of the diaper is about 130 to 400 mm (however, wider than the width of the absorbent surface of the diaper). In this case, the front-rear direction length of the crotch portion C2 is about 10-150 mm, the front-side portion F2 is about 50-350 mm, and the rear-side portion B2 is about 50-350 mm. can do.

  The pad-type disposable diaper 200 has a basic structure in which absorbent bodies 30 and 40 are interposed between an inner surface of a liquid-impervious backsheet 21 having an outer sheet 23 laminated on the outer surface and a liquid-permeable topsheet 22. Have.

  On the back side of the absorbers 30 and 40, a liquid-impermeable back sheet 21 is provided so as to protrude from the periphery of the absorbers 30 and 40. As the liquid-impermeable back sheet 21, in addition to a polyethylene film or the like, a sheet having moisture permeability can be used without impairing water shielding from the viewpoint of preventing stuffiness. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. Can be used.

  Moreover, the outer surface of the liquid-impermeable back sheet 21 is covered with an exterior sheet 23 made of a nonwoven fabric. Various nonwoven fabrics can be used as the exterior sheet 23. As the material fiber constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.

  The surface sides of the absorbent bodies 30 and 40 are covered with a liquid-permeable top sheet 22. As the top sheet 22, a perforated or non-porous nonwoven fabric or a perforated plastic sheet is used. As the material fiber constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.

  It is desirable to interpose the intermediate sheet 25 between the top sheet 22 and the absorbers 30 and 40. The intermediate sheet 25 is provided to prevent the urine that has been absorbed by the absorbers 30 and 40 from reversing, and has a low water retention and high liquid permeability, such as a mesh film, an air-through nonwoven fabric, It is desirable to use a nonwoven fabric such as an SMMS nonwoven fabric. When the front end of the top sheet 22 is 0% and the rear end of the top sheet 22 is 100%, the front end of the intermediate sheet 25 is preferably located in the range of 0 to 11%. It is preferably located in the range of 92 to 100%. The width 25w of the intermediate sheet 25 is preferably about 50 to 90% of the width W2 of the absorbers 30 and 40.

  At both ends in the front-rear direction of the pad-type disposable diaper 200, the liquid-impervious back sheet 21, the exterior sheet 23, and the liquid-permeable top sheet 22 are respectively extended on the front and rear sides than the front and rear ends of the absorbent bodies 30 and 40. The end flap part EF without the absorbers 30 and 40 being bonded is formed. Also on both sides of the pad-type disposable diaper 200, the liquid-impervious back sheet 21, the exterior sheet 23, and the liquid-permeable top sheet 22 are each extended outward from the side edges of the absorbers 30, 40 and bonded together. Side flap part SF in which the absorbers 30 and 40 do not exist is configured. These bonded portions are indicated by dotted patterns in the figure, and can be formed by hot melt adhesive, heat sealing, or ultrasonic sealing.

  Characteristically, a main absorbent body 30 and an inner thigh absorbent body 40 are provided as absorbent bodies.

The absorbent bodies 30 and 40 are basically made of pulp fiber piles, aggregates of filaments such as cellulose acetate, or non-woven fabrics, and are mixed or fixed with a superabsorbent polymer such as particles if necessary. Things can be used. The fiber basis weight and the basis weight of the superabsorbent polymer in the absorbent bodies 30 and 40 can be determined as appropriate, but the fiber basis weight is preferably about 100 to 600 g / m ^2, and the basis weight of the absorbent polymer is 0 to 400 g / m. ^It is preferably about ² . The absorbent bodies 30 and 40 can be wrapped with a wrapping sheet (not shown) such as crepe paper, if necessary, such as when mixing superabsorbent polymer particles. Moreover, the shape of the absorbers 30 and 40 can be made into appropriate shapes, such as a strip shape whose front part is relatively wider than the rear part, a rectangular shape, a trapezoidal shape, or the like.

  In the main absorbent body 30, a predetermined portion in the middle in the front-rear direction including the crotch portion C2 is formed as a narrow constricted portion 30n. The minimum width W3 of the constricted portion 30n is preferably about 50 to 65% of the width (total width of the absorber 30) W2 of the non-constricted portion positioned before and after the constricted portion 30n. When the front end of the diaper is 0% and the rear end of the diaper is 100%, the front end of the constricted portion 30n is preferably located in the range of 10 to 25%, and the rear end of the constricted portion 30n is 40 to 65%. It is preferable that the portion of the constricted portion 30n having the minimum width W3 (minimum width portion) is preferably in the range of 25 to 30%.

  The inner thigh fitting absorbent body 40 is opposed to the region from the depression on the front side of the adductor bulge portion of the wearer to the depression on the rear side of the adductor bulge portion, and is a line along the adductor bulge portion. It has the shape easy bending part 41. FIG.

  The inner thigh-fitting absorbent body 40 can have a left and right continuous structure as shown in FIG. 7, but by adopting a left and right independent structure as shown in FIGS. 1 to 6, the flexibility of the crotch portion C2 Can be followed independently with respect to the shape and movement of each foot, so that the fitability to the adductor bulge portion and the depressions before and after it is further enhanced. In this case, the widthwise interval between the left and right inner thigh-fitting absorbers 40 may not be free (that is, may be in contact), but is preferably about 10 to 40 mm. Further, in this case, it is preferable that a slit 50 penetrating in the thickness direction is formed in the main absorbent body 30 so as to overlap at least a part of the region between the left and right inner thigh fit absorbent bodies 40. The slit 50 may be a wider area including the entire area between the left and right inner thigh fitting absorbers 40. Although the dimension of the slit 50 can be determined as appropriate, the length in the front-rear direction is about 0.4 to 0.8 times the length in the front-rear direction of the absorbent body 40 for inner thigh fitting, and the length in the width direction is one inner thigh. The width of the fitting absorbent body 40 can be about 0.1 to 0.5 times the length in the width direction.

  The position of the inner thigh fitting absorbent body 40 can be determined as long as it faces the region from the depression on the front side of the adductor bulge portion to the depression on the rear side of the adductor bulge portion. In the direction, it is desirable that the easy-bending portion 41 is located in front of the crotch portion C2.

  Further, the inner thigh fitting absorbent body 40 may be located only on the inner side in the width direction of the side edge of the main absorbent body 30 or only on the outer side in the width direction, but the illustrated form (including the form of FIG. 7). When the side edge of the main absorbent body 30 extends from the inner side in the width direction to the outer side in the width direction as described above, the outer side of the side edge of the main absorbent body 30 in the inner thigh fitting absorbent body 40 is along the inner thigh This is preferable because it not only easily deforms but also elastically presses against the inner thigh.

  The easy-bending portion 41 can be provided by forming a step between a thick-walled portion and a thin-walled portion, a linear thin-walled portion, or a slit as long as it is easy to bend with its extending direction as a folding position. It is desirable that the thigh-fitting absorbent body 40 is provided by a linear recess formed by embossing because it is more difficult to collapse and is easy to manufacture. In order to make it easy to fold the inner thigh fitting absorbent body 40 along the easy-bending portion 41 and to maintain the folded state, the side edge of the inner thigh fitting absorbent body 40 intersects with the adductor bulge portion. It is preferable to form a recess 42 that is recessed at the center in the width direction. Moreover, as shown in FIGS. 1 to 6, when the inner thigh fitting absorbent body 40 is left and right independent, the widthwise central edge and the adductor bulge portion of the inner thigh fitting absorbent body 40 It is preferable to provide a recess 42 that is recessed toward the center in the width direction at the intersecting position.

  In use, as shown in FIG. 5 and FIG. 6, the inner thigh-fitting absorbent body 40 is folded at the easily bendable portion 41 so as to sandwich the adductor bulge portion 100 of the wearer's thigh 110. To do. As a result, not only the adductor bulge portion 100 but also the anteroposterior depressions 101 and 102 can be firmly fitted to the inner thigh fitting absorbent body 40. Therefore, the leakage resulting from the adductor bulge portion 100 and the depressions 101 and 102 before and after it can be more effectively prevented.

  The shape of the inner thigh fitting absorber 40 can be determined as appropriate, but a portion facing the front depression of the adductor bulge and a portion facing the rear depression of the adductor ridge In addition, it is preferable that each of them has an elongated shape in the extending direction of the adductor bulge portion (a direction slightly inclined backward with respect to the width direction). Further, the inner thigh fitting absorber 40 preferably has a rounded shape. Further, the portion other than the easy-bending portion 41 in the inner thigh fitting absorbent body 40 may have a uniform thickness, but as shown in FIG. 4B, the rear end of the region in front of the easy-bending portion 41 6 and the front end of the region on the rear side of the easy-folding portion 41 (that is, the vicinity of the front and back of the easy-folding portion 41) is a raised portion 43 that is raised on the surface side, as shown in FIG. The raised portion 43 is preferable because it firmly fits in the depressions before and after the adductor raised portion.

  In addition, such a protruding part 43 may be formed by increasing the material weight of the part more than that of the other part, or may be formed by a method of warping the part. For example, an elastic member 44 for bulging that contracts the front side and the rear side (only one of them) of the easily bendable portion 41 in the inner thigh fit absorber 40 in the front-rear direction on the back side of the inner thigh fit absorber 40. It can also be provided. In the illustrated embodiment, a plurality of the protruding elastic members 44 are provided at intervals in the width direction, but may be smaller or larger than this. Further, the protruding elastic member 44 shown in the figure is continuous from the front side to the rear side of the easy-bending portion 41 (that is, the same elastic member on both the front and rear sides), but is provided independently on the front and rear sides of the easy-folding portion 41. You can also. By having such a raised elastic member 44, the front side and the rear side of the easy-bend portion 41 of the absorbent body 40 for inner thigh fitting are raised so that the front and rear depressions of the adductor ridge are firmly fitted. Become.

  Further, a bending elastic member 45 for contracting the inner thigh fit absorber 40 in the width direction is provided on the back side of the inner thigh fit absorber 40, and the inner thigh fit absorber 40 is deformed along the inner thigh. It is also a preferred form that it is configured to elastically press against the inner thigh. In the illustrated embodiment, a plurality of bending elastic members are provided at intervals in the front-rear direction, but may be less or more than this. When multiple bending elastic members are provided, if they are parallel to each other at the same length and the same position in the width direction, they will not bend unless there is an influence of the force of other parts, so the length, the position in the width direction, and the angle with respect to the width direction At least one (all in the illustrated embodiment) is differentiated.

  As the elastic member 44 for bulging and the elastic member 45 for bending, styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene formed in a thread shape, a string shape, a belt shape, or the like. Commonly used materials such as silicon and polyester can be used.

  The inner thigh fitting absorbent body 40 extends in a direction intersecting with the three-dimensional gather 24. Therefore, in order to make the function effective, the inner thigh fitting absorbent body 40 is configured from the rear end portion of the inner thigh fitting absorbent body 40. However, it is desirable not to provide the three-dimensional gather 24 on the front side. Specifically, in the illustrated form, the three-dimensional gathers 24 are provided only in the range from the rear end portion to the rear end of the inner thigh fitting absorber 40 in the diaper. The three-dimensional gather 24 is formed by using a gather sheet 24s folded into a two-layer structure and an elongated elastic member, and a base portion 24x joined to the surface of the side portion of the top sheet, and extends from the base portion. A main body portion 24c, an inferior portion 24d formed by fixing both front and rear ends of the main body portion 24c in a lying state, and a free portion 24f formed by unfixing a portion between the inclining portions 24d in the main body portion. The elongated elastic member is fixed in a gathered sheet 24s at the distal end portion of the free portion 24f in a state of extending in the front-rear direction. In such a three-dimensional gather 24, the free part rises with respect to the inner surface of the diaper (in the illustrated form, the surface of the top sheet 22) by the contraction force of the elongated elastic member 24G. As a material for the gather sheet 24s, a plastic sheet or a melt-blown nonwoven fabric can be used, but from the viewpoint of touch to the skin, a nonwoven fabric that is water-repellent treated with silicon or the like is preferably used. Further, as the elongated elastic member 24G, styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester, which are formed in a thread shape, a string shape, a belt shape, or the like. For example, a commonly used material can be used.

  On the other hand, in the form in which the three-dimensional gather 24 is not provided in front of the rear end portion of the inner thigh fitting absorber 40 as shown in the illustrated embodiment, the easily bendable portion 41 of the inner thigh fitting absorber 40 is used for the inner thigh fitting. If the side edge of the absorber 40 is reached, there is a possibility that excrement may be led out by the easy bending portion 41 as a passage. Therefore, it is desirable to form the easy-bending portion 41 so as not to reach the side edge of the inner thigh fitting absorber 40 as shown in the figure. In addition, as shown in FIGS. 1 to 6, when the inner thigh fitting absorbent body 40 is left and right independent, the easily bendable portion 41 has an edge on the opposite side of the inner thigh fitting absorbent body 40 (the center in the width direction). It may be formed so as not to reach the side edge.

  INDUSTRIAL APPLICABILITY The present invention can be used for absorbent articles in general, such as pad-type, pant-type or tape-type disposable diapers, or sanitary napkins.

  DESCRIPTION OF SYMBOLS 21 ... Liquid-impermeable back sheet, 22 ... Liquid-permeable top sheet, 25 ... Intermediate sheet, 30, 40 ... Absorber, 30 ... Main absorber, 30n ... Constricted part, 24 ... Solid gather, 23 ... Exterior sheet, 40 ... Absorber for inner thigh fitting, 200 ... Pad type disposable diaper, C2 ... Crotch part, F2 ... Front side part, B2 ... Rear side part, L ... Diaper full length, W1 ... Diaper full width, W2 ... Absorber full width, 41 ... Easily bendable part, 43 ... raised part, 44 ... elastic member for raising, 45 ... elastic member for bending, 100 ... raised part of adductor muscle, 101, 102 ... depression, 50 ... slit.

Claims (9)

In an absorbent article having a front side portion and a rear side portion extending respectively to the front side and the rear side of the crotch part,
A main absorber is provided from the front part to the rear part,
On this main absorber, there is a linear easy-bending portion along the adductor bulge portion and facing the region from the depression on the front side of the adductor bulge portion to the recess on the rear side of the adductor bulge portion Absorber for inner thigh fit is provided,
An absorbent article characterized by the above.   The absorbent article according to claim 1, wherein the inner thigh-fitting absorbent body extends from a width direction inner side to a width direction outer side of a side edge of the main absorbent body.   The said inner thigh fitting absorber has a rear end portion in a region on the front side of the easily bendable portion and a front end portion in a region on the rear side of the easily bendable portion are raised on the surface side. Absorbent articles.   The absorbent article according to any one of claims 1 to 3, wherein the inner thigh fitting absorbent body is provided independently on the left and right. Three-dimensional gathers are not provided on both sides of the absorbent article on the front side of the rear end part of the absorbent body for inner thigh fitting,
The absorbent article according to any one of claims 1 to 4, wherein the easily bent portion does not reach a side edge of the absorbent body for inner thigh fitting.   The said inner thigh fitting absorber is formed with a hollow portion that is recessed toward the center in the width direction at a position that intersects the side edge and the adductor bulge portion. Absorbent articles.   2. A raised elastic member for contracting in the front-rear direction at least one of the front side and the rear side of the easily bendable portion of the inner thigh fit absorber is provided on the back side of the inner thigh fit absorber. The absorbent article of any one of -6.   The absorbent article according to any one of claims 1 to 7, wherein an elastic member for bending that contracts the absorbent body for inner thigh fit in a width direction is provided on a back side of the absorbent body for inner thigh fit. .   The absorbent article according to claim 4, wherein a slit penetrating in the thickness direction is formed in the main absorbent body so as to overlap at least a part of a region between the left and right inner thigh fitting absorbent bodies.

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