JP5921094B2 - Absorbent articles - Google Patents

Description

  The present invention relates to absorbent articles such as incontinence pads, urine-absorbing pads, and sanitary napkins.

  Conventionally, as an absorbent article, the absorbent body has a large number of small absorbent parts (or high basis weight parts having a relatively large amount of absorbent material) dispersed in the planar direction, and a three-dimensional gather. Things are known. The absorbent article of Patent Document 1 has an absorbent body in which a large number of individual absorbent parts are arranged over the planar direction of the article, and the large number of absorbent parts are between the topsheet and the absorbent body. It is fixed to the intermediate sheet arranged in the. Moreover, in patent document 1, it describes that a pair of solid guard is arrange | positioned in the right-and-left both sides part on a surface sheet as needed. Further, the diaper of Patent Document 2 has an absorbent laminate in which liquid-permeable two-layer sheets are partially bonded to each other leaving a plurality of elongated circular non-bonded portions. A superabsorbent material is arranged inside each pocket region. The diaper is formed with a pair of storage flaps on both sides in the longitudinal direction.

JP 2009-172363 A Japanese National Patent Publication No. 09-504206

In order to prevent leakage, it is effective that the absorbent article is deformed so as to form a cup shape (a three-dimensional shape having a concave portion at the center in both the longitudinal and lateral directions) when worn. is there. In Patent Document 1, it is considered that the absorbent body has a flexible structure, but the three-dimensional guard is not described at all about the fixed portion fixed to the surface sheet at both ends in the longitudinal direction. The positional relationship of is unknown. Depending on the positional relationship between the fixed part and the absorber, the cup shape is difficult to form even when the three-dimensional gather expands and contracts.
Also in Patent Document 2, the relationship between the position of the absorbent laminate and the fixing position of the storage flap is not clarified. In Patent Document 2, it is described that the absorbent laminate is preferably laminated with a distribution layer made of hydrophilic fibers and serving as a secondary absorber. When such a laminated structure is adopted, the absorbent structure of Patent Document 2 lacks flexibility, so that it is not easily deformed as the elastic member of the storage flap contracts, and the diaper of Patent Document 2 lacks leakage prevention properties. .

  Therefore, the subject of this invention is providing the absorbent article which was easy to form cup shape with shrinkage | contraction of solid gathers, and was excellent in leak-proof property.

  The present invention is a vertically long absorbent article comprising a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorbent body interposed between both sheets. The absorbent body has a plurality of high basis weight parts dispersed in the plane direction, and a low basis weight part disposed between the high basis weight parts and having a basis weight lower than that of the high basis weight part. The absorbent article includes a waterproof sheet and an elastic member fixed to the waterproof sheet on both sides in the longitudinal direction of the absorbent article, and includes a three-dimensional gather that stands on the wearer side. At both ends in the longitudinal direction, there is a fixed portion fixed in a state of being laid down on the top sheet on the absorber, and the fixed portion is positioned on the high basis weight portion. It provides a sex product.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which is easy to form cup shape with shrinkage | contraction of solid gathers, and was excellent in leak-proof property is provided.

FIG. 1 is a partially broken plan view schematically showing a skin contact surface side (surface sheet side) in an expanded state of an incontinence pad which is an embodiment of the absorbent article of the present invention. The stretched state refers to a state in which the incontinence pad is expanded to the design dimension (same as the dimension when the incontinence pad is flattened in a state where the influence of the elastic member is completely eliminated) by extending the elastic member of each part. . FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II of FIG. 3 is a cross-sectional view schematically showing a cross section taken along line II-II in FIG. FIG. 4 is a plan view of the incontinence pad shown in FIG. 1 in a stretched state, schematically showing positions of a high basis weight portion, a fixing portion, and the like. FIG. 5 is a modified example of the present invention and corresponds to FIG. FIG. 6 shows another modification of the present invention and is a view corresponding to FIG.

Below, this invention is demonstrated, referring drawings based on the preferable embodiment.
As shown in FIGS. 1 and 2, an incontinence pad 1 (hereinafter also referred to as incontinence pad 1) that is an embodiment of the present invention is a surface sheet 2 arranged on the skin contact surface side, a non-skin contact surface side 2 and the absorbent body 4 interposed between the two sheets 2 and 3 and are vertically long (a shape that is long in one direction). The absorbent body 4 includes a plurality of high basis weight parts H dispersed in the plane direction, and a low basis weight part L having a basis weight lower than the high basis weight part H, which is arranged between the high basis weight parts H. Have. The incontinence pad 1 includes a three-dimensional gather 5 including a waterproof sheet 6 and an elastic member 51 fixed to the waterproof sheet 6 on both sides in the longitudinal direction. The solid gather 5 stands up toward the wearer when worn. As shown in FIGS. 2 and 4, the three-dimensional gather 5 is fixed to the top sheet 2 in a state where the three-dimensional gather 5 is faced down on the top sheet 2 on the absorbent body 4 at both longitudinal ends 50, 50. The fixing portion F is located on the high basis weight portion H.

In addition, the longitudinal direction (longitudinal direction) of the absorbent article is a direction that coincides with the wearer's front-rear direction when worn, and the width direction of the absorbent article is a direction substantially orthogonal to the longitudinal direction. In the figure, the direction indicated by the symbol X (X direction) is the longitudinal direction of the absorbent article (absorber, absorbent core, solid gather), and the direction indicated by the symbol Y (Y direction) is the absorbent article (absorption). Body, absorbent core, three-dimensional gather). In the present embodiment, the longitudinal direction of the absorber, the absorbent core, and the three-dimensional gather also coincides with the X direction.
1, 2 and 4 is a line extending in the X direction and bisecting the incontinence pad 1 in the Y direction (the length in the X direction of the incontinence pad 1 is bisected). It is.
Moreover, the plane direction of an absorbent article (absorber, absorbent core) is a direction in which an XY plane composed of a longitudinal direction (X direction) and a width direction (Y direction) of the absorbent article extends. Moreover, the thickness direction of an absorbent article is a direction shown by Z in the figure. Further, the skin contact surface is a surface directed to the wearer's skin side when the absorbent article is worn in the absorbent article, and the non-skin contact surface is the skin when the absorbent article is worn in the absorbent article. This is the surface that is directed to the opposite side (usually the clothing side).

As shown in FIG. 1, the incontinence pad 1 has a substantially rectangular shape that is long in the X direction in the drawing, and both end edges in the longitudinal direction are formed in an arc shape. The top sheet 2 is liquid permeable, and one surface of the top sheet 2 constitutes the skin contact surface of the incontinence pad 1. The back surface sheet 3 has liquid impermeability or liquid incompatibility, and one surface of the back surface sheet 3 constitutes a surface on the non-skin contact surface side of the incontinence pad 1 directed toward the clothing side.
The top sheet 2, the back sheet 3, and the absorber 4 each have a shape that is long in the same direction as the longitudinal direction (X direction) of the incontinence pad 1. As shown in FIGS. 2 and 3, the absorber 4 is sandwiched and fixed between the top sheet 2 and the back sheet 3. Both side portions in the longitudinal direction of the topsheet 2 are wound down to the non-skin facing surface side of the absorber 4 and are joined to the absorber 4 and / or the backsheet 3 between the absorber 4 and the backsheet 3. .

  The absorber 4 includes an absorbent core 40 including an absorbent material (fiber material such as pulp, water-absorbing polymer, etc.). As shown in FIG. 2, the absorbent body 4 in the present embodiment is configured by covering an absorbent core 40 with a core wrap sheet 44 made of tissue paper or a water-permeable nonwoven fabric. The absorptive core 40 may be comprised only from fiber materials, such as a pulp fiber, and the water absorbing polymer may be hold | maintained between this fiber material. Between the top sheet 2 and the absorber 4 and between the absorber 4 and the back sheet 3 are bonded to each other by a pattern-coated adhesive (hot melt adhesive or the like) such as dots, spirals, and stripes. Yes. For example, both side portions of the absorber 4 are bonded and fixed to the top sheet 2. The non-skin contact surface side of the absorbent body 4 is bonded and fixed to the back sheet 3.

As shown in FIG.1 and FIG.2, the absorber 4 has the high basic weight part H with a comparatively high basic weight, and the low basic weight part L with a comparatively low basic weight. In this embodiment, the high basic weight part H of the absorber 4 is a part in which the basic weight of the absorbent material of the absorbent core 40 is relatively high in the absorbent body 4, and the low basic weight part L of the absorbent body 4 is In the absorber 4, the basis weight of the absorbent material of the absorbent core 40 is a relatively low part. Further, the portion of the absorbent core 40 in which the basis weight of the absorbent material is relatively high is the high basis weight portion 41 of the absorbent core 40, and the basis weight of the absorbent material in the absorbent core 40 is relatively low. The portion is the low basis weight portion 42 of the absorbent core 40.
One high basis weight part H in the absorbent body 4 of the present embodiment is from a portion located above and below the one high basis weight part 41 in the absorbent core 40 and the one high basis weight part 41 in the core wrap sheet 44. The one low basis weight portion L in the absorbent body 4 is configured from portions located above and below the one low basis weight portion 42 in the absorbent core 40 and the one low basis weight portion 42 in the core wrap sheet 44. Is done.
As shown in FIGS. 1 and 4, a large number of high basis weight portions H are dispersed in the planar direction of the absorbent body 4, and the low basis weight portions L are arranged between the high basis weight portions H.

Hereinafter, regarding the absorber 4 in the present embodiment, the positional relationship between the high basis weight portion H and the low basis weight portion L and the respective shapes in plan view will be described based on FIGS. 1 and 4.
In the absorbent body 4, high basis weight portions H and low basis weight portions L are alternately formed in a predetermined direction (X direction). More specifically, as shown in FIGS. 1 and 4, the high basis weight portion row HX in which a plurality of high basis weight portions H are arranged at intervals in the longitudinal direction (X direction) of the pad 1 is the pad 1. A plurality of rows are formed at intervals in the width direction (Y direction).
The low basis weight portion L is arranged between the high basis weight portions H both in the longitudinal direction (X direction) and in the width direction (Y direction), and surrounds each high basis weight portion H. H is partitioned.

As shown in FIGS. 1 and 4, the low basis weight portion L includes a portion LY arranged between the high basis weight portions H in the X direction, and a portion LX arranged between the high basis weight portions H in the Y direction. have. A plurality of the portions LX are arranged in series in the Y direction, whereby a linear portion Lu extending continuously in the X direction is formed. The linear portion Lu extends over substantially the entire length of the absorbent body 4 in the X direction. Further, the high basis weight portion row HX is formed by dividing the absorbent body 4 in the pad width direction (Y direction) by a linear portion Lu.
In this embodiment, the X direction position of the high basic weight part H in the high basic weight part row | line | column HX adjacent to each other has shifted | deviated. Moreover, the X direction position of the said part LY in the high basic weight part row | line | column HX adjacent to each other is also shifted | deviated. Thus, in this embodiment, many high basic weight parts H are arrange | positioned at the absorber 4 in zigzag form. In the present embodiment, in the high basis weight portion rows HX adjacent to each other, the X direction position of the high basis weight portion H is shifted by a half pitch.
Many high basic weight parts H are formed in the substantially same rectangular shape in planar view. However, among the many high basis weight portions H, those along the both ends in the longitudinal direction of the arc-shaped incontinence pad 1 have a shape matched to the edge shape.

  The high basis weight portion H of the absorbent body 4 and the high basis weight portion 41 of the absorbent core 40 are formed in the same shape at the same position in the plan view of the absorbent body 4, and the low basis weight of the absorbent body 4. The amount L and the low basis weight portion 42 of the absorbent core 40 are formed in the same position and in the same shape in the plan view of the absorbent body 4. For this reason, the positional relationship and each shape of the high basic weight part 41 and the low basic weight part 42 in planar view are the same as the positional relationship and each shape of the high basic weight part H and the low basic weight part L mentioned above. .

  As shown in FIG.2 and FIG.3, the low basic weight part 42 of the absorptive core 40 is unevenly distributed in one of the thickness directions (Z direction) in the absorptive core 40. FIG. More specifically, the low basis weight portion 42 is unevenly distributed on the skin contact surface side of the absorbent core 40 in the thickness direction (Z direction). And since the low basic weight part 42 is unevenly distributed in the skin contact surface side of the absorbent core 40 in this way, the high basic weight part 41 of the absorbent core 40 is on the opposite side to the skin contact surface, That is, it protrudes to the non-skin contact surface side of the absorbent core 40. Accordingly, the surface on the skin contact surface side of the absorbent core 40 is substantially flat with substantially no irregularities, whereas the surface on the non-skin contact surface side is protruded and formed with a high basis weight portion 41 ( Convex and concave portions are formed by a low basis weight portion 42 (non-convex portion or concave portion) located between the convex portion) and the high basis weight portions 41, 41.

The ratio (SH / SL) of the basis weight SH of the high basis weight part H of the absorbent body 4 to the basis weight SL of the low basis weight part L is preferably 1.2 to 65, more preferably 1.5 to 20. is there.
The basis weight SH of the high basis weight part H is preferably 220 to 1400 g / m ² , more preferably 250 to 1000 g / m ² , and the basis weight SL of the low basis weight part L is preferably 20 to 350 g / m 2. ² and more preferably 50 to 200 g / m ² .
Moreover, the ratio (S41 / S42) of the basis weight S41 of the high basis weight part 41 of the absorbent core 40 and the basis weight S42 of the low basis weight part 42 is preferably 1.2 or more, more preferably 1.5 to. 30.
The basis weight S41 of the high basis weight portion 41 of the absorbent core 40 is preferably 180 to 1200 g / m ² , more preferably 220 to 900 g / m ² , and the basis weight S42 of the low basis weight portion 42 is preferably It is 0-150 g / m < ² >, More preferably, it is 30-90 g / m < ² >.

The ratio (T41 / T42) of the thickness T41 (see FIG. 2) of the high basis weight portion 41 of the absorbent core 40 and the thickness T42 (see FIG. 2) of the low basis weight portion 42 is preferably 1.2 or more. Preferably it is 1.5-20.
The thickness T41 of the high basis weight portion 41 of the absorbent core 40 is preferably 0.5 to 10 mm, more preferably 2 to 9 mm, and the thickness T42 of the low basis weight portion 42 is preferably 0 to 2 mm, more preferably. Is 0.5 to 1.5 mm.

The size of the high basis weight portion H of the absorbent body 4 in a plan view as shown in FIG. 1 and FIG. 3 can be determined as appropriate according to the type and application of the absorbent article. In an incontinence pad such as the pad 1, a urine absorption pad, a sanitary napkin, etc., for example, the length LHx (see FIG. 1) in the longitudinal direction (X direction) is preferably 10 to 30 mm, more preferably 13 to 25 mm. The length LHy in the width direction Y (see FIG. 1) is preferably 5 to 20 mm, more preferably 6 to 13 mm.
It is preferable that 15 to 140, particularly 15 to 100, high basis weight portions H of the absorber 4 are formed on the absorber 4.
Further, as in the present embodiment, when the high basis weight portion H has a plurality of high basis weight portion rows HX (41X) arranged at predetermined intervals in the X direction, the high basis weight portion row HX is the absorber 4. Preferably, 3 to 11 rows, more preferably 5 to 9 rows (7 rows in the illustrated example) are formed.

  The absorbent core 40 in the present embodiment is manufactured by molding an absorbent material so that the high basis weight portion 41 and the low basis weight portion 42 are formed, and the high basis weight portion 41 and the low basis weight portion 41 are formed. The amount portion 42 is integrally formed from the same material, and is integrated without using a bonding means such as an adhesive or heat fusion. For this reason, the high basic weight part 41 and the low basic weight part 42 in this embodiment have the continuity in which a liquid can move smoothly.

  As shown in FIG. 1, the incontinence pad 1 includes a pair of three-dimensional gathers 5 and 5 that stand on the wearer side on both sides in the longitudinal direction (X direction). As shown in FIGS. 2 and 3, in the present embodiment, the three-dimensional gathers 5 are arranged on both sides of the absorbent body 4 covered with the top sheet 2. Specifically, a pair of waterproof sheets 6 and 6 for forming a three-dimensional gather having a certain width are disposed on both sides in the longitudinal direction of the incontinence pad 1 over almost the entire length in the X direction. . As shown in FIGS. 2 and 3, one side edge portion of the sheet 6 is arranged on the back side of the absorbent body 4 together with the top sheet 2, and joined to the back sheet 3 together with the top sheet 2 to fix the three-dimensional gather 5. An end 53 is formed. The free end 52 of the three-dimensional gather 5 is composed of the other side edge of the sheet 6. The free end 52 side of the three-dimensional gather 5 (sheet 6) is folded outward in the width direction (Y direction) along the X direction. Accordingly, as shown in FIGS. 2 and 3, in the present embodiment, the free end portion 52 of the three-dimensional gather 5 is located in the width direction (Y direction) outside (incontinence pad 1) from the width direction center line CL side of the incontinence pad 1. Side edge 1a side). Hereinafter, a portion from the folding position of the three-dimensional gather 5 (sheet 6) to the free end portion 52 is referred to as a folding portion 55.

  In the vicinity of the free end 52 of the three-dimensional gather 5 (sheet 6), one or a plurality of elastic members 51 (two in FIG. 2) are fixed in an expanded state in the X direction. In the present embodiment, the elastic member 51 is disposed beyond the central region A in the longitudinal direction (X direction) of the incontinence pad 1 and is provided over the entire length of the solid gather 5 in the X direction. Here, the central region A in the longitudinal direction of the incontinence pad 1 is a central region when the incontinence pad 1 is divided into three in the X direction, for example, a region occupying 50% of the total length of the incontinence pad 1 in the X direction, or The region includes the region and is wider than the region.

  As shown in FIG. 2, the three-dimensional gather 5 (sheet 6) is fixed on the top sheet 2 on the absorbent body 4 in the longitudinal direction (X direction) both ends 50, 50. More specifically, the three-dimensional gather 5 (sheet 6) is formed on the top sheet 2 on the absorbent body 4 with the free end 52 side being folded outward in the width direction as described above at both longitudinal ends 50, 50. Have fallen into. The three-dimensional gather 5 (sheet 6) has a hot melt adhesive or the like between the aforementioned folded portion 55 and the sheet portion 56 closer to the fixed end portion 53 than the folded portion 55 at both longitudinal end portions 50, 50 thereof. Bonded and fixed with an adhesive 9. Further, the sheet portion 56 is bonded and fixed to the surface sheet 2 on the absorbent body 4 with an adhesive 9 such as a hot melt adhesive. A portion of the three-dimensional gather 5 (sheet 6) that is bonded and fixed to the top sheet 2 at both longitudinal end portions 50 is referred to as a fixed portion F. In this embodiment, the fixing | fixed part F is a part joined and fixed to the surface sheet 2 among the said sheet | seat parts 56 in the three-dimensional gather 5 (sheet | seat 6).

  As shown in FIG. 2, the three-dimensional gather 5 does not stand up in the fixing portion F because the free end 52 side having the elastic member 51 is fixed on the topsheet 2. That is, the three-dimensional gather 5 does not stand up at each of the longitudinal ends 50 and 50 where the fixing portion F is formed. On the other hand, as for the three-dimensional gather 5, the free end part 52 side is not being fixed to the other sheet material in the longitudinal direction center area | region A and its vicinity. For this reason, the three-dimensional gather 5 stands up toward the wearer side using the expansion and contraction force of the elastic member 51 as shown in FIG. As shown in FIG. 3, in the three-dimensional gather 5 (sheet 6), the free end 52 side is folded outward in the Y direction, so that the folded portion 55 strikes the skin of the wearer in a planar shape and stimulates the skin. Can be reduced.

In the present embodiment, the fixing portion F is a portion indicated by hatching with diagonal lines from the lower left to the upper right in FIG. Note that the hatched portion from the upper left to the lower right of FIG. 4 indicates the position of a later-described misalignment layer 10, and as will be described later, in this embodiment, the fixing portion F is entirely misaligned. Since it overlaps with the layer 10 in the plane direction, the fixing portion F is indicated by lattice-like hatching.
In the example shown in FIG. 4, the inner edge (side edge on the inner side in the Y direction) Fb of the fixed portion F is a straight line that is substantially parallel to the X direction, The edge portion Fc is a straight line substantially parallel to the Y direction, but is not limited to the shape shown in the drawing. For example, these may be an inclined straight line or a curved line such as a wavy line.

Preferably, the Y-direction distance LFy between the inner edge Fb of the fixed portion F and the incontinence pad side edge 1a is 10 to 30%, more preferably 15 to 25%, with respect to the full width Ly in the Y direction of the incontinence pad 1. It is. When the Y-direction distance LFy is not constant along the X direction (when the inner edge portion Fb of the fixing portion F is not substantially linear parallel to the X direction), the inner edge portion Fb of the fixing portion F and the incontinence pad side edge 1a. And the maximum distance in the Y direction.
Further, the X-direction distance LFx between the center side edge Fc of the fixing portion F and the longitudinal tip position 1e of the incontinence pad 1 is 15 to 35% with respect to the total length Lx of the incontinence pad, and more preferably 18-30%. When the Y-direction distance LFx is not constant along the Y direction (when the central side edge Fc of the fixing portion F is not substantially linear parallel to the Y direction), the Y-direction distance LFx and the central side edge Fc of the fixing portion F The maximum distance in the Y direction from the incontinence pad tip position 1e.

As shown in FIGS. 2 and 4, the fixing portion F is located on the high basis weight portion H. In the example shown in FIG. 4, the fixed portion F partially overlaps the high basis weight portion H in plan view. The entire fixing portion F may overlap the high basis weight portion H and the incontinence pad 1. Note that “in plan view” means a state in plan view with the incontinence pad 1 in an extended state, as shown in FIGS. 1 and 4. Of the area QF of the fixed part F, the ratio (QF4 / QF) of the area QF4 of the part that overlaps the high basis weight part 41 in the plan view (the part located above the high basis weight part 41) is preferably 30% or more. More preferably, it is 40% or more.
In the example shown in FIG. 4, the fixed portion F overlaps with the plurality of high basis weight portions H and is located on the plurality of high basis weight portions H in plan view. However, the fixed part F may overlap with only one high basis weight part H in plan view.

The incontinence pad 1 of the present embodiment has a fixed portion F in which a three-dimensional gather 5 including an elastic member 51 is fixed on the surface sheet 2 on the absorbent body 4 at both end portions 50 and 50 in the longitudinal direction. Yes. For this reason, due to the contraction of the three-dimensional gather 5 (elastic member 51), both ends and both sides in the longitudinal direction of the absorbent body 4 are easily lifted upward. Furthermore, since the absorber 4 has the low basic weight part L distribute | arranged between the high basic weight parts H distributed many in the plane direction, it is easy to bend | fold from the low basic weight part L. For this reason, the absorber 4 (and the incontinence pad 1) easily forms a cup shape (a shape in which the central portion is concave in the X direction and the central portion is also concave in the Y direction). As a result, the incontinence pad 1 has excellent leakage prevention performance. Furthermore, according to the incontinence pad 1 of the present embodiment, since the fixing portion F is positioned on the high basis weight portion H, the high basis weight portion H positioned between the fixing portions F in the X direction and the Y direction is firmly secured. It is easy to be close to the wearer's skin by being lifted upwards, and has excellent leakage prevention performance. In particular, as in this embodiment, when the concave shape is formed on the non-skin contact surface side of the absorbent core 40, the absorbent core 40 itself is more easily bent on the skin contact surface side. Leakage prevention performance is better.

As shown in FIG. 4, the absorbent body 4 of the present embodiment has an inner high basis weight portion located next to the inside (width direction center line CL side) of the outermost high basis weight portion H ′ in the Y direction. H ″, and the inner edge Fb of the fixing portion F is located on the inner side (width direction center line CL side) of the incontinence pad 1 than the outer edge H ″ a of the inner high basis weight portion H ″. As a result, a portion of the entire absorbent body 4 that overlaps with the fixed portion F in a plan view is enlarged, so that both side portions of the absorbent body 4 are lifted upward due to the expansion and contraction of the elastic member 51 of the three-dimensional gather 5. The absorbent body 4 (incontinence pad 1) is more likely to form a cup shape, and the high basis weight portion H located between the fixed portions F in the Y direction is likely to be close to the wearer's skin. The pad 1 is further excellent in leakage prevention performance.
As shown in FIG. 4, in the present embodiment, the fixing portion F is formed across the outermost high basis weight portion H ′ and the inner high basis weight portion H ″ adjacent to the inner side in the Y direction. The fixing portion F may be formed so as to straddle the inner high basis weight portion H ″ further inside than the inner high basis weight portion H ″ in the Y direction.

  When a plurality of high basis weight part rows HX are arranged at predetermined intervals in the Y direction as in the present embodiment, the high basis weight is between the inner edges Fb and Fb of the fixed part F in the Y direction. It is preferable from the viewpoint of forming a cup shape along the wearer's skin surface that one or more quantity part rows HX are formed. More preferably, the number of high basis weight portion rows HX arranged between the inner edge portions Fb and Fb in the Y direction is 2 to 4 rows. Here, in the Y direction, the high basis weight portion row HX arranged between the inner edge portions Fb is a high basis weight portion row whose entirety is located between the inner edge portions Fb of the fixing portion F. In the example shown in FIG.

  Moreover, when the fixing | fixed part F is located on the high basic weight part H'X located in the outermost side in a Y direction like this embodiment, Preferably, the longitudinal direction both ends 50, 3D of the solid gather 5 are provided. One or two high basis weight portions H ′ arranged in the X direction are arranged between the center side edge portions Fc of the respective fixed portions F.

Moreover, as shown in FIG.1, FIG3 and FIG.4, the incontinence pad 1 has the pressing groove 7 in which the surface by the side of a skin contact surface was dented the absorber 4 in the center area | region A of a longitudinal direction. As shown in FIG. 1 and FIG. 4, the compressed grooves 7 are arranged one by one on both sides of the center line CL in the width direction of the incontinence pad 1, and extend along the longitudinal direction of the incontinence pad 1. . In the expression of extending along the longitudinal direction, in addition to the case where the compressed groove 7 extends linearly, the compressed groove 7 has an arc shape or other shape, but generally extends in the longitudinal direction. It is also included. Moreover, in the pressing groove 7, it is preferable that the surface sheet 2 is also depressed in the pressing groove 7.
Since the absorbent body 4 of this embodiment has the low basic weight part L distribute | arranged between many high basic weight parts H, and is normally formed, the cup shape of the incontinence pad 1 is normal. Prone to instability. However, in the incontinence pad 1 of the present embodiment, the absorbent body 4 has a relatively high rigidity at the site where the compressed grooves 7 and 7 are formed. Therefore, in the Y direction, the absorbent body 4 is likely to be flat between the compressed grooves 7 and 7, and the outside of the compressed grooves 7 and 7 is easily bent from the low basis weight L. Thereby, the cup shape of the incontinence pad 1 is easily stabilized.

  The pressing grooves 7, 7 can be formed according to a conventional method by embossing such as embossing with or without heat, or ultrasonic embossing. That is, in the manufacturing process of the incontinence pad 1, after supplying the topsheet 2 on one surface of the absorber 4 (absorbent core 40 having an uneven structure), the embossing process is performed to move a predetermined portion from the topsheet 2 side to the absorber 4 side. The pressing groove 7 can be formed in the predetermined portion by pressing (squeezing) in a concave shape toward the surface. In the pressing groove 7, the top sheet 2 and the absorber 4 are integrated by heat fusion or the like. The compressed groove 7 has a large number of deep depressions (relatively deep depressions, high embossing parts) and shallow depressions (relatively shallow depressions) such as rectangles, squares, rhombuses, circles, and crosses in plan view. Or low embossed portions) may be alternately connected to form a continuous line as a whole, or a plurality of hollow portions may be intermittently arranged.

  As shown in FIG. 4, the pair of compressed grooves 7 and 7 are preferably formed symmetrically with respect to the center line CL in the width direction from the viewpoint of forming a cup shape that matches the skin surface of the wearer. As shown in FIG. 4, the compressed groove 7 is shaped stably by the compressed grooves 7 and 7 so that the whole of the compressed groove 7 is located on the side of the center line CL in the width direction with respect to the inner edge Fb of the fixed portion F. From the viewpoint of further improving the effect.

In the present embodiment, the compressed groove 7 is formed in a gently curved shape that is convex from the outer side in the Y direction toward the center line CL in the width direction. A central portion in the longitudinal direction of the compressed groove 7 extends in the X direction along the low basis weight portion L. In the Y direction, a linear portion Lu extending in the X direction of the low basis weight portion L is disposed between the portion 7a closest to the center line CL in the width direction of the compressed grooves 7 and 7 and the inner edge Fb of the fixing portion F. It is preferable from a viewpoint of obtaining the softness | flexibility which is excellent in mounting property, improving the shape stabilization effect by the pressing grooves 7 and 7 more.
As shown in FIGS. 3 and 4, in the present embodiment, the compressed groove 7 is formed so that a part thereof overlaps the linear portion Lu extending in the X direction, but it is not always necessary. For example, the compressed grooves 7 may be formed only on the high basis weight portions H juxtaposed in the X direction and the Y direction linear portions LY of the low basis weight portions L arranged therebetween.
Three or more pressing grooves 7 may be formed. For example, two pressing grooves 7 and 7 may be formed on both sides of the width direction center line CL of the incontinence pad 1, and the pressing grooves are formed on the width direction center line CL between the pair of pressing grooves 7 and 7. One squeezing groove 7 similar to 7 or 7 may be formed.
Furthermore, the pressing groove 7 does not reach the fixing portions F located on both sides with respect to the longitudinal direction (the longitudinal ends of the pressing grooves 7 are positioned closer to the center in the X direction than the center side edge portion Fc of the fixing portion F). It is preferable from the viewpoint of facilitating the formation of the cup shape. In addition, it is preferable from the viewpoint of cup shape formation easiness that the compressed groove 7 is located only on the inner side in the width direction than the free end portion 52 of the three-dimensional gather 8.

  Further, as described above, the three-dimensional gather 5 has the free end 52 side folded back outward in the Y direction. Therefore, the elastic member 51 disposed on the free end portion 52 is positioned in the vicinity of the side edge 1 a of the incontinence pad 1. Thereby, the absorber 4 is easily deformed by the expansion and contraction of the elastic member 51, and the cup shape is more easily formed. The elastic member 51 of the three-dimensional gather 5 only needs to be disposed in the central region A in the longitudinal direction, and does not necessarily have to extend in the X direction to both longitudinal ends 50 and 50 of the three-dimensional gather 5. However, as shown in FIG. 2, when the elastic member 51 extends to both ends 50, 50 in the longitudinal direction of the three-dimensional gather 5, at least one elastic member 51 is the most at the both ends 50, 50. It is preferable to be located on the outer side in the Y direction than the high basis weight portion H ′ on the outer side in the Y direction.

  Further, as described above, since the position of the high basis weight portion H is shifted in the plurality of high basis weight portion rows HX, the absorbent body 4 (incontinence pad 1) can easily form a cup shape having a deep and gentle inclination. Become. The high basis weight portion H is preferably shifted by a half pitch, but may be shifted by a third pitch or a quarter pitch.

  The incontinence pad 1 is used by being fixed to a wearer's clothing (for example, underwear such as shorts), and the clothing side surface (non-skin contact surface) of the back sheet 3 is a clothing such as a crotch portion of shorts when worn. Directed to the side. The incontinence pad 1 includes a slip prevention layer 10 made of an adhesive on the clothing side surface (non-skin contact surface) of the back sheet 3 as a fixing means that can be fixed to the clothing. The slip prevention layer 10 is formed by applying a pressure sensitive adhesive such as a hot melt pressure sensitive adhesive to a predetermined location. Before the incontinence pad 1 is used, it is covered with a release sheet (not shown) made of a film, nonwoven fabric, paper or the like. ing. When the incontinence pad 1 has the low basis weight portion L disposed between the high basis weight portions H of the absorbent body 4, the incontinence pad 1 is fixed to the clothing via the slip stopper layer 10, so that the body of the wearer As the body moves, it easily deforms integrally with the clothing.

  The misalignment prevention layer 10 is shown as xx on the non-skin contact surface of the back sheet 3 in FIGS. Further, in FIG. 4, the misalignment prevention layer 10 is indicated by hatched hatching from the upper left to the lower right, and a part thereof overlaps with the fixed portion F indicated by the hatched hatching from the lower left to the upper right in plan view. ing. If the misalignment prevention layer 10 is not formed so as to overlap with the fixed portion F in plan view, the absorber 4 may be formed flexibly, and the free end of the three-dimensional gather 5 may be formed in the central region A in the longitudinal direction. The portion 52 side (folded portion 55 in the present embodiment) tends to fall to the topsheet 2 side. In this case, the three-dimensional gather 5 does not stand up toward the wearer, or the absorption surface of the absorbent body 4 is deformed, so that the incontinence pad 1 cannot form a cup shape stably. However, in the incontinence pad 1 of this embodiment, since the slip prevention layer 10 overlaps with the fixing portion F in a plan view, the fixing portion F is firmly fixed on the clothing when worn, and the above-described problems can be prevented. it can.

  In the example shown in FIG. 4, the slip prevention layer 10 is formed in a substantially I shape extending in the X direction in plan view. In the illustrated example, a part of the anti-slipping layer 10 overlaps the fixed part F in the planar direction, but the whole anti-slipping layer 10 may overlap the fixed part F in plan view. That is, the anti-slip layer 10 may be formed only at the four corners of the incontinence pad 1 as with the fixing portion F. As shown in FIG. 4, it is preferable that the entire fixing portion F overlaps the misalignment prevention layer 10 in plan view. When only a part of the fixing part F overlaps with the anti-slipping layer 10 in plan view, preferably 30% or more of the area of the fixing part F in plan view overlaps with the anti-slipping part 10 in the plane direction. Preferably 40% or more overlap.

The formation material of each part of the diaper 1 mentioned above is demonstrated.
As the top sheet 2, the back sheet 3, the absorbent body 4, the waterproof sheet 6, and the like, various materials conventionally used for absorbent articles such as incontinence pads can be used without particular limitation. For example, as the surface sheet 2, a liquid-permeable sheet such as a nonwoven fabric or an apertured film can be used. As the back sheet 3, for example, a resin film that does not have moisture permeability, a resin film that has micropores and has moisture permeability, a nonwoven fabric such as a water-repellent nonwoven fabric, a laminate of these and other sheets, and the like are used. Can do. As the waterproof sheet 6, the same sheet as the back sheet 3 can be used. The back sheet 3 may be a laminated sheet in which a liquid-permeable or liquid-impermeable nonwoven fabric is laminated on the surface of the moisture-permeable or moisture-impermeable resin film on the non-skin contact surface side.

  Examples of the material for forming the elastic member 51 include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, and polyurethane. As a form of the elastic member, a cross-sectionally rectangular, square, circular, elliptical or polygonal thread shape (thread rubber or the like), a string shape (flat rubber etc.), or a multifilament type thread shape or the like It can be preferably used.

  As an absorptive material which is a forming material of the absorptive core 40, various materials conventionally used in the technical field can be used without particular limitation. For example, natural materials such as wood pulp, cotton, hemp and the like can be used as fiber materials. Fibers: synthetic fibers made of synthetic resins such as polyethylene and polypropylene; semi-synthetic fibers such as acetate and rayon can be used. These fiber materials can be used singly or in combination of two or more. Further, in addition to these fiber materials, water-absorbing polymers of various shapes such as particles can be used as the absorbent material.

  In addition, as the pressure-sensitive adhesive forming the slip-preventing layer (slip-preventing portion), various types of materials conventionally used for absorbent articles can be used without any particular limitation, but mainly a basic structure similar to natural rubber. It is preferable to use a synthetic rubber-based block copolymer having Examples of such a block copolymer include styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-propylene-styrene copolymer (SEPS), and styrene-butadiene-styrene block copolymer (SBS). And styrene-ethylene-butylene-styrene copolymer (SEBS). The pressure-sensitive adhesive preferably contains 10 to 65% by weight, particularly 30 to 50% by weight, of one or more base polymers selected from these block copolymers.

  As mentioned above, although preferable embodiment was described about the absorbent article of this invention, this invention is not restrict | limited to each embodiment mentioned above at all, and can be changed suitably. For example, in said embodiment, the high basic weight part H of the absorber 4 is a part in which the basic weight of the absorptive material of the absorbent core 40 in the absorber 4 is relatively high, and the low basic weight of the absorber 4 The portion L was a portion in which the basis weight of the absorbent material of the absorbent core 40 in the absorbent body 4 was relatively low, but as shown in FIG. 5, the low basis weight portion 41 of the absorbent core 40 was absorbed. You may change to the part 43 without a sexual material. In this case, the high basis weight portion H of the absorbent body 4 is composed of a small absorbent portion 41A where the absorbent material of the absorbent core 40 is present and portions positioned above and below the small absorbent portion 41A of the core wrap sheet 44. Is done. The low basis weight portion L of the absorbent body 4 is composed of a portion 43 having no absorbent material of the absorbent core 40 and portions positioned above and below the portion 43 of the core wrap sheet 44.

For example, in the said embodiment, although the low basic weight part 42 of the absorptive core 40 was unevenly distributed in the skin contact surface side of the thickness direction of the absorptive core 40, on the contrary, in FIG. As shown, it may be unevenly distributed on the non-skin contact surface side. In the incontinence pad 1 </ b> B shown in FIG. 6, the high basis weight portion 41 protrudes to the skin contact surface side of the absorbent core 40, and the absorbent core 40 as a whole is upside down as shown in FIGS. 2 and 3. become. Further, for example, the low basis weight portion L may be configured to include a first low basis weight portion and a second low basis weight portion which are two different basis weight portions. For example, it is preferable to increase the basis weight of the low basis weight portion extending in the Y direction rather than the low basis weight portion extending in the X direction from the viewpoint of easily forming a cup shape having a good balance in the longitudinal direction and the width direction. The basis weight of the first low basis weight part is preferably 20 to 100 g / m ² , and the basis weight of the second low basis weight part is preferably 0 to 40 g / m ² . The ratio of the basis weight of the high basis weight part and the first low basis weight part at that time is 1.2 or more, and the ratio of the basis weight of the first low basis weight part and the second low basis weight part is 1.2 or more. Preferably there is.

  Moreover, the high basic weight part H in the absorber 4 does not necessarily need to be arrange | positioned at zigzag form. For example, the high basis weight part H and the low basis weight part L may be alternately formed not only in the X direction but also in the Y direction. Specifically, the low basis weight portion L includes an X-direction linear portion extending along the longitudinal direction (X direction) and a Y-direction linear portion extending along the width direction (Y direction). A plurality of low basis weight portions L are formed in a lattice shape as a whole, and portions partitioned by these lattice-like low basis weight portions L may be high basis weight portions H. In that case, the linear portion in the X direction is formed to extend over the entire length in the longitudinal direction (X direction) of the absorber 4, and the linear portion in the Y direction is the width of the absorber 4, respectively. You may make it extend over the full length of a direction (Y direction).

  In the three-dimensional gather 5 (sheet 6), in the longitudinal direction both ends 50, 50, the free end 52 side is not folded outward in the width direction, that is, the free end 52 is located closest to the width direction center line CL. It may be fixed on the surface sheet 2 on the absorbent body 4 in such a state that it is turned down.

  In addition to the incontinence pad, the absorbent article of the present invention may be a urine collection pad, a sanitary napkin, a disposable diaper, or the like.

  In addition, the description omitted in one embodiment and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately applied between the embodiments. Can be substituted for each other.

1 Incontinence pad (absorbent article)
2 Top sheet 3 Back sheet 4 Absorber H, H 'Absorber high basis weight H "Inner high basis weight part H" a Outer edge HX, H'X High basis weight part row L of inner high basis weight part , LX, LY, Lu Absorber low basis weight part 40 Absorbent core 41 Absorbent core high basis weight part 42 Absorbent core low basis weight part 5 Solid gather 52 Solid gather free end 51 Elastic member 6 Waterproof Sheet 7 squeezing groove 10 misalignment prevention layer A longitudinal direction center region CL width direction center line F fixing part Fb inner edge part of fixing part

Claims (6)

A vertically long absorbent article comprising a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorbent body interposed between both sheets,
The absorbent body has an absorbent core containing an absorbent material, a plurality of high basis weight parts dispersed in a plane direction, and located between the high basis weight parts and having a basis weight that is higher than the high basis weight part. With a low low basis weight,
In the absorbent body, the high basis weight portion is a portion where the basis weight of the absorbent material of the absorbent core is higher than the low basis weight portion, and the low basis weight portion includes the high basis weight portion and the high basis weight portion. Compared to the part where the basis weight of the absorbent material of the absorbent core is low,
In the absorbent core, the surface on the non-skin contact surface side of the high basis weight portion protrudes toward the non-skin contact surface side than the low basis weight portion, and the skin contact surface of the absorbent core The side surface is substantially flat with no irregularities,
It includes a waterproof sheet and an elastic member fixed to the waterproof sheet on both sides in the longitudinal direction of the absorbent article, and includes a three-dimensional gather that stands on the wearer side,
The three-dimensional gather has a fixing part fixed in a state where it is lying down on the top sheet on the absorber at both longitudinal ends thereof, and the fixing part is located on the high basis weight part. Absorbent article.   The absorbent body has an inner high basis weight portion located next to the inner side of the outermost high basis weight portion in the width direction of the absorbent article, and the inner edge of the fixing portion is The absorbent article of Claim 1 located inside the outer edge part of an inner side high basic weight part. The three-dimensional gather has a free end portion that is not fixed to another sheet material in the central region in the longitudinal direction of the absorbent article, and the free end side is on the outer side in the width direction of the absorbent article. The absorptive article according to claim 1 or 2 currently turned up. The low basis weight part is disposed between the high basis weight parts in both the longitudinal direction and the width direction of the absorbent article,
Provided with a plurality of adjacent high basis weight part rows partitioned in the width direction by the low basis weight part, and in the adjacent high basis weight part rows, the position in the longitudinal direction of the high basis weight part is shifted. The absorbent article according to any one of claims 1 to 3 . The back sheet is provided with fixing means that can be fixed to clothing,
The absorbent article according to any one of claims 1 to 4 , wherein at least a part of the fixing means overlaps with the fixing portion in a state in which the absorbent article is viewed in plan. Said absorbent core includes a portion forming said a portion forming the high basis weight portion low basis weight portion is integrally formed of the same absorbent material, any one of claims 1 to 5 The absorbent article according to 1.

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