JP5812651B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper. In particular, the present invention relates to a pants-type disposable diaper comprising a substantially rectangular front waistline member, a rear waistline member and an absorbent main body which are separate from each other.

  Patent Document 1 discloses a disposable diaper having an absorbent body embossed portion extending in the product longitudinal direction and curved along a leg and having an elastic member disposed thereon. In this disposable diaper, the leg-hole elastic member is curved and disposed along the leg opening. In such a conventional disposable diaper, since the elastic member is arranged in a state of approaching the vicinity of the absorbent core at the crotch portion, the absorbent core continues to be fitted to the body even when the wearer moves. It was possible. On the other hand, since the curved elastic member is arranged, the body is covered in a wide range, and it is difficult to obtain a clean appearance, and the production difficulty is high due to the necessity of arranging the curved elastic member. Since a sheet is required, the amount of materials increases. For these reasons, a disposable diaper having a configuration in which the elastic member is arranged in a straight line along the product width direction and the longitudinal direction has been required.

  Patent Document 2 discloses a disposable pull-on garment having a waist opening and two leg openings and extending in the vertical direction and the horizontal direction. The pull-on garment includes an absorbent main body and an annular elastic belt, and the absorbent A body including a liquid permeable top sheet, a liquid impermeable back sheet, and an absorbent core disposed therebetween, wherein the absorbent body includes left and right longitudinally extending side edges; A front and rear laterally extending end edges, longitudinally opposed front and rear waist panels, and a crotch panel between the waist panels, wherein the annular elastic belt is a front belt A front belt portion and a rear belt portion, each of the front belt portion and the rear belt portion including a belt layer and a belt elastic member joined to the belt layer, and each of the front belt portion and the rear belt portion. Are laterally extending proximal and distal edges, wherein the proximal edge is located closer to the crotch panel of the absorbent body than the distal edge. A longitudinal edge, a longitudinally extending left and right side edge connecting the proximal edge and the distal edge, a central panel, and a left and right side panel continuous to the central panel. A front belt portion and a rear belt portion, each side panel having left and right side panels having a longitudinal length defined by a respective side edge of the respective belt portion; The central panel of the front belt portion is joined to the front waist panel of the absorbent body, the central panel of the back belt portion is joined to the back waist panel of the absorbent body, the front belt portion and The back belt part The left and right side panels of each are joined together at or adjacent to the left and right side edges, respectively, and the waist opening and the 2 A disposable pull-on garment forming a leg opening and wherein the longitudinal length of each side panel of the rear belt portion is longer than the longitudinal length of the corresponding side panel of the front belt portion. Yes.

JP 2002-165835 A Special table 2008-508082

In the pants-type disposable diaper of Patent Document 2, the waistline elastic member presses the front and rear ends of the absorbent body disposed on the crotch panel. The absorbent body from the crotch side edge of the front waistline belt to the crotch side edge of the rear waistline belt (that is, the crotch region) is free without an elastic member disposed and pressed across. Therefore, the front and rear ends of the absorbent body are pressed and fixed to the body during wearing, but the crotch area is not pressed, so the wearer's movement causes the front and rear ends of the waistline belt to move forward and backward. Easy to move. As a result, the absorbent core is divided and easily leaks. Furthermore, if urination is performed, the absorption core becomes excessively brittle, and the tendency becomes remarkable. Further, in order to reduce the thickness of the absorbent core, the amount of pulp is generally reduced. However, if this is done, the entanglement of the pulp fibers is reduced, making it more fragile, and the tendency becomes remarkable.
An object of the present invention is to suppress the splitting of the absorbent core in the vicinity of the lower side of the waistline belt in a pant-type disposable diaper comprising a substantially rectangular front waistline member, rear waistline member, and absorbent main body that are separate from each other.

The present invention suppresses the splitting of the absorbent core by providing a pressing portion at a specific position of the absorbent core in a pant-type disposable diaper comprising a substantially rectangular front waistline member, a rear waistline member and an absorbent main body that are separate from each other. Is.
That is, the present invention comprises substantially rectangular front waistline members, rear waistline members and an absorbent main body, which are separate from each other.
The front part of the absorbent main body is overlapped and joined to the front waistline member, the rear part of the absorbent main body is overlapped and joined to the rear waistline member, and the part of the absorbent main body that does not overlap the front waistline member and the rear waistline member is the crotch Forming a zone,
The right side edge of the front waistline member and the right side edge of the rear waistline member are joined, and the left side edge of the front waistline member and the left side edge of the rear waistline member are joined to form a waist opening and two leg openings. , A pants-type disposable diaper,
A plurality of waistline elastic members are disposed in the left-right direction on the front waistline member and the back waistline member,
At least one leg-hole elastic member is disposed in the front-rear direction on each of the left and right side portions of the absorbent main body,
The waistline elastic member closest to the crotch region among the waistline elastic members is disposed from the junction between the front waistline member and the back waistline member to at least a position beyond the lateral side edge of the absorbent main body,
The absorbent main body consists of a liquid-permeable top sheet, a leak-proof film, and an absorbent core interposed between the liquid-permeable top sheet and the leak-proof film,
A part of the absorbent core overlaps with the front waistline member and / or the back waistline member,
The absorbent core has a squeezing portion, and the squeezing portion straddles the front waistline member or the rear waistline member over the line where the waistline elastic member closest to the crotch region is disposed or over the extension line of the line. A pants-type disposable diaper that exists across both the overlapping area and the crotch area.

In a preferred embodiment, there are at least one squeezed portion on the right side of the absorbent core, at least one on the left side of the absorbent core, and at least one on the left and right central portion of the absorbent core.
In a preferred embodiment, at least the squeezed portions present on the right side and the left side cross the waist elastic member closest to the crotch region.
In a preferred embodiment, the leg elastic member intersects the waist elastic member closest to the crotch region.
In a preferred embodiment, the squeezed part is not present in the front and rear center part of the crotch region.
In a preferred embodiment, there is a squeezed portion extending in the left-right direction at the front-rear central portion of the crotch region.
In a preferred embodiment, the compressed portion extends to the vicinity of the front and rear end edges of the absorbent core.
In a preferred embodiment, the length from the crotch region side end of the squeezed portion to the rear end edge of the front waistline member or the front end edge of the rear waistline member is 1/10 or more of the longitudinal length of the crotch region.
In a preferred embodiment, the pressing part extends in the front-rear direction.

  Since the disposable diaper of this invention provided the pressing part over the waist part and the crotch area in the absorption core, it is hard to generate | occur | produce division | segmentation of an absorption core.

FIG. 1 is a developed plan view of an embodiment of a pants-type disposable diaper of the present invention. FIG. 2 is a schematic diagram of a cross-sectional view taken along line II in FIG. FIG. 3 shows one example of the arrangement of the pressing parts. FIG. 4 shows another example of the arrangement of the pressing parts. FIG. 5 shows another example of the arrangement of the pressing parts. FIG. 6 shows another example of the arrangement of the pressing parts. FIG. 7 shows another example of the arrangement of the pressing parts. FIG. 8 shows another example of the arrangement of the pressing parts. FIG. 9 shows another example of the arrangement of the pressing parts. FIG. 10 shows another example of the arrangement of the pressing parts. FIG. 11 shows another example of the arrangement of the pressing parts.

  The present invention will be described below with reference to the drawings, but the present invention is not limited to those described in the drawings.

  FIG. 1 is a developed plan view of an embodiment of a pants-type disposable diaper of the present invention. The pants-type disposable diaper 1 includes a front waistline member 2, a rear waistline member 3, and an absorbent main body 4. The front waistline member 2, the rear waistline member 3, and the absorbent main body 4 are separate from each other, and all have a substantially rectangular shape. The front portion of the absorbent main body 4 overlaps with the front waistline member 2 and is joined by a hot melt adhesive or the like. The rear portion of the absorbent main body 4 overlaps with the rear waistline member 3 and is joined by a hot melt adhesive or the like. In the present invention, a portion of the absorbent main body 4 that does not overlap the front waistline member and the rear waistline member is referred to as a crotch region 5. Note that, when simply referred to as “the waistline member”, both the front waistline member 2 and the back waistline member 3 are indicated.

Examples of the sheet constituting the waist member include various known fiber nonwoven fabrics having hydrophobicity or liquid impermeability, such as spunbond nonwoven fabrics, point bond nonwoven fabrics, SMS (with a mass in the range of about 10 to 40 g / m ^2. Spunbond / meltblown / spunbond) non-woven fabric, liquid-impervious plastic film, laminate thereof and the like can be used.

  FIG. 1 shows the unfolded state of the pants-type disposable diaper 1, but the right side edge 6 of the front waistline member and the right side edge 7 of the rear waistline member are joined together, and the left side edge 8 of the front waistline member and the rear waistline member The left side edge 9 is joined to form a pants-type disposable diaper 1, and the pants-type disposable diaper 1 has a waist opening and two leg openings.

  In the present invention, the front waistline member 2 and the rear waistline member 3 are provided with a plurality of waistline elastic members 10 in the left-right direction X. The waistline elastic member 10 may be arranged continuously from the right side edge to the left side edge of the waistline member, or may be discontinuous on the absorbent main body 4 as shown in FIG. Good.

  The waistline elastic member 10a closest to the crotch region among the waistline elastic members is a joint between the front waistline member and the back waistline member (that is, the right edge 6 or the left edge 8 of the front waistline member or the right edge 7 of the back waistline member or It is arranged from the left edge 9) to a position at least beyond the lateral edge of the absorbent main body 4.

  In the present invention, at least one leg-hole elastic member 11 is disposed in the front-rear direction Y on each of the left and right side portions of the absorbent main body 4. In the embodiment shown in FIG. 1, two leg-hole elastic members 11 are arranged on the right side of the absorbent main body 4 and two on the left side. The leg elastic member 11 does not necessarily have to be disposed over the entire length of the absorbent main body 4 in the front-rear direction, and may not intersect the waist elastic member 10a closest to the crotch region. Preferably, the leg-holes elastic member 11 intersects the waistline elastic member 10a closest to the crotch region. Since the leg elastic member 11 intersects the waist elastic member 10a closest to the crotch region, the fit around the leg is further improved.

  As the elastic member used as the waist elastic member 10 and the leg elastic member 11, a thread rubber made of polyurethane elastic fiber, a rubber made of natural rubber, or an elastic sheet made of polyurethane fiber can be used. It becomes possible to repeatedly expand and contract the member in which the is disposed along the arrangement direction.

FIG. 2 is a schematic diagram of a cross-sectional view taken along line II in FIG.
The absorptive main body 4 includes a liquid-permeable top sheet 12, a leak-proof film 13, and an absorbent core 14 interposed between the liquid-permeable top sheet and the leak-proof film.

Examples of the material constituting the liquid-permeable top sheet 12 include various fiber nonwoven fabrics having liquid permeability, such as air-through fiber nonwoven fabrics having a mass of about 15 to 45 g / m ² , spunbond nonwoven fabrics, SMS (spunbond-meltblown-spun). Bond) non-woven fabric or the like can be used.

The material constituting the leak-proof film 13 can be formed from a leak-proof (liquid-impermeable) plastic film, a hardly liquid-permeable fiber nonwoven fabric, a laminate thereof, or the like. It can form from 10-30 g / m < ² > SMS fiber nonwoven fabric, a spun bond fiber nonwoven fabric, etc.

The absorbent core 14 is preferably composed of a mixture of superabsorbent polymer particles (SAP) and ground pulp. The absorbent core 14 may further include a thermoplastic synthetic fiber. The absorbent core is formed in a predetermined shape by mixing superabsorbent polymer particles (SAP) and fluff pulp or thermoplastic synthetic fibers. When the absorbent core 14 is made of a mixture of superabsorbent polymer particles and pulverized pulp, the amount of superabsorbent polymer particles is preferably 50 to 400 g / m ² and the amount of pulverized pulp is preferably 50 to 400 g / m2. ² . The mass ratio of the superabsorbent polymer in the total mass of the absorbent core composed of the superabsorbent polymer particles and pulverized pulp is preferably 30 to 65%.

The absorbent core 14 may be covered with a core wrap sheet (not shown). The core wrap sheet is a sheet that covers the absorbent core, and at least part of the skin surface side uses various fiber nonwoven fabrics or tissue sheets having liquid permeability. For example, the mass of about 10 to 30 g / ^{m 2} of air-through fibrous nonwoven fabric, spunbonded nonwoven fabric, SMS (spunbond - Merutoburon - spunbond) nonwoven fabric, using a tissue sheet of 10 to 30 g / m ^2. The core wrap sheet covers the absorbent core in order to improve the shape retention and liquid diffusibility of the absorbent core.

The absorptive main body 4 may have a three-dimensional gather (not shown) for preventing side leakage on the left and right sides. As the sheet constituting the three-dimensional gather, various known fiber nonwoven fabrics having hydrophobicity or liquid impermeability, for example, a spunbond nonwoven fabric, a point bond nonwoven fabric, an SMS (with a mass in the range of about 10 to 40 g / m ² , SMS ( Spunbond, meltblown, spunband) non-woven fabric, liquid-impervious plastic film, laminates thereof and the like can be used.

  In the present invention, a part of the absorbent core 14 overlaps the front waistline member 2 and / or the rear waistline member 3. In the embodiment shown in FIG. 1, the front portion of the absorbent core 14 overlaps with the front waistline member 2, and the rear portion of the absorbent core 14 overlaps with the rear waistline member 3. The absorbent core 14 may overlap only with one of the front waistline member 2 and the rear waistline member 3 although it overlaps with both the waistline member 3. Preferably, the absorbent core 14 overlaps at least the front waistline member 2.

  The absorbent core 14 has a pressing part 15. The squeezing part 15 exists over the line where the waist elastic member 10a closest to the crotch region is disposed or over the extended line of the line. Furthermore, the pressing part 15 exists over both the area | region where the absorption core 14 overlaps with the front waistline member 2 or the back waistline member 3, and the crotch area 5. FIG. Here, a pressing part means the part which was compressed by embossing etc., the thickness reduced, and the density became high instead. Although the thickness of a pressing part is not limited, For example, 15-70% of the thickness before pressing (thickness of the part which is not compressed), Preferably it is 20-60%, More preferably, it is 25 ~ 50%. If the thickness is compressed below 15%, the core wrap sheet and / or the liquid-permeable top sheet covering the absorbent core tends to be broken, and the superabsorbent polymer particles appear on the clothing side. It can cause troubles. On the other hand, if the thickness is left more than 70%, the rigidity of the absorbent core cannot be sufficiently increased, and the effect targeted by the present invention is hardly exhibited. Although the width | variety of a pressing part is not limited, For example, it is 0.5-10 mm, Preferably it is 0.5-4 mm, More preferably, it is 1.0-3.0 mm. If the width is narrower than 0.5 mm, the rigidity of the absorbent core cannot be sufficiently increased, and the effect targeted by the present invention is hardly exhibited. Moreover, when it becomes a width | variety larger than 10 mm, since a pressing part inhibits that the liquid excreted in the absorption core is absorbed (taken in) rather than the site | part which is not squeezed, a width | variety becomes wide. If it is too much, the body fluid will not be readily absorbed by the absorbent core. In the present invention, these squeezing parts may be close to the urination position, and if they are difficult to be absorbed, leakage will be induced.

The disposable diaper of the present invention is a pants-type disposable diaper comprising a substantially rectangular front waistline member, a rear waistline member and an absorbent main body which are separate from each other. The advantage of such a type of pants-type disposable diaper is that the trim around the legs can be minimized and the amount of material can be reduced. The disposable diaper of the present invention does not cover the wearer's legs widely, but can cover a relatively narrow range between the waist and legs as necessary, so that a clean appearance image can be given. .
However, since the waistline elastic member 10a closest to the crotch region disposed on the waistline member and the legliner elastic member on the side of the absorbent main body are orthogonal to each other, the structure fits the circumference of the leg. It is impossible to uniformly fit around the columnar legs (the term orthogonal here means that the elastic members are not directly joined but connected to each other through the cloth). Specifically, only the waistline elastic member 10a closest to the crotch region is responsible for preventing leg circumference displacement, and the leg circumference elastic member stands up from the side of the absorbent body that hangs downward and fits to the inner crotch. Not involved in prevention. Further, if the waistline elastic member 10a closest to the crotch region is displaced, the crotch region is also lowered, so that the leg periphery elastic member does not fit.
Since the waist elastic member 10a closest to the crotch region has a structure that obtains the fit around the leg by hanging the leg elastic member, the extension load of the waist elastic member 10a closest to the crotch region is set strongly. By doing so, the absorption core which overlaps with the waist elastic member 10a closest to the crotch region is firmly applied to the body and is not displaced.
However, the absorbent core in the crotch region that is not held down by the waistline member is forced to move back and forth around the boundary line between the waistline member and the crotch region by the operation of the wearer. This is particularly noticeable when the wearer moves or sits down.
As a result, the absorbent core is easily divided near the boundary between the waistline member and the crotch region. If a split occurs on the ventral side, the absorption core in the vicinity of the urinary organ is absent, so that it cannot be absorbed immediately and is likely to leak. If splitting occurs on the dorsal side, the absorption core near the buttocks is absent and the rigidity in the width direction is lost, so both sides of the absorbent main body are likely to lean inward, and there is no space to accommodate excreted stool, There arises a problem in that the three-dimensional gathers arranged on both side edges of the absorbent main body that protrudes without being covered with the diaper enter the wearer's buttocks, giving a feeling of discomfort to the wearer.
In the disposable diaper of the present invention, the absorbent core has a squeezing part, and the squeezing part straddles over the line where the waist elastic member closest to the crotch region is arranged or over the extension line of the line, It exists over both the area | region and crotch area which overlap with the front waistline member or the back waistline member. In the compressed portion, the pulp fibers are pressed against each other as compared with the non-compressed portion, and the high density including the superabsorbent polymer included therebetween is high, and as a result, the rigidity is higher than the non-compressed portion. . Therefore, a pressing part suppresses bending. Moreover, since the pressing part is press-contacted, it is hard to come loose. In addition, not only the pulverized pulp but also the superabsorbent polymer particles are present in the absorbent core, so that the pulp fibers in the pressed portion are more firmly bonded. Therefore, even when the absorbent core moves back and forth starting from the boundary between the waistline member and the crotch region due to the movement of the wearer, the pulp fibers constituting the absorbent core are separated from each other in the compressed portion with high rigidity and density. Can be suppressed. As a result, it is possible to maintain a state where the absorbent core does not collapse.
In addition, there is a non-compressed portion at the boundary between the waistline member and the crotch region, and since the boundary is easier to bend the absorbent core than the compressed portion, the wearer moves. Also, it does not feel uncomfortable to wear (it is preferable that a highly rigid part by pressing and an easily bent part by non-squeezing coexist in the boundary part). Therefore, even when the pulp basis weight of the absorbent core is low, the shape change is improved, and the performance and wearing state are improved (if the absorbent core breaks down, it becomes impossible to suck liquid at that portion. It is close to the urination position, and there is a high possibility of leakage when collapse occurs.
Since the disposable diaper of this invention provided the pressing part in the specific position of the absorption core, division | segmentation of an absorption core does not generate | occur | produce. In addition, even an absorbent main body with a low absorbent core weight improves shape loss and improves the performance and wearing condition. Moreover, even with a thin absorbent core with a low pulp basis weight, the shape loss is improved, and the mole performance and wearing state are improved. Moreover, since a region having both absorption performance and prevention of shape loss is formed in the crotch region, the leakage performance is further improved. While exhibiting the same mole performance, it is possible to lower the pulp basis weight, and an absorbent core having a low pulp basis weight can reduce the cost. Moreover, even if a wearer moves to stand or sit, the absorbent core does not collapse, and the absorbent core can be prevented from jumping away from the wearer's body when worn. As a result, it is possible to maintain a clean appearance even after liquid absorption.

  The squeezed portion is formed between the region between the crotch region and the region that overlaps the front waist member or the rear waist member over the line where the waist elastic member closest to the crotch region is disposed or the extension line of the line. As long as it exists over both, you may arrange | position how. The example of arrangement | positioning of a pressing part is shown in FIGS. The disposable diaper of the present invention has a waistline elastic member and a legliner elastic member, but the waistline elastic member and the legline elastic member are not shown in FIGS. .

In a preferred embodiment, as shown in FIG. 1, there are at least one squeezed portion 15 on the right side of the absorbent core, at least one on the left side of the absorbent core, and at least one on the left and right center of the absorbent core. ing. When the wearer walks, the absorbent core receives force from side to side, and the absorbent core moves from side to side. For this force, the presence of the compressed parts on both sides and the center of the absorbent core makes it possible to form a skeleton that is difficult to collapse, and even if the absorbent core moves left and right due to the movement of the wearer, the absorbent core It becomes difficult to collapse.
Furthermore, as shown in FIG. 1, it is preferable that at least the compressed parts present on the right side and the left side intersect the waist elastic member 10a closest to the crotch region. Since the pressing part 15 intersects with the waist elastic member 10a closest to the crotch region, the absorbent core 14 is further less likely to collapse.

Although the pressing part 14 may exist in the front-rear center part of the crotch area 5, it is preferable that it does not exist in the front-rear center part of the crotch area. When the wearer walks, the absorbent core 14 receives a force from side to side, but since the squeezed portion does not exist in the front and rear center of the crotch region, the force is transmitted to the boundary between the waistline member and the crotch region. Can interfere.
In another aspect, the pressing part extended in the left-right direction X exists in the front-rear center part of the crotch region. Since the front and rear center region of the crotch region is a part sandwiched between the legs of the wearer, the absorber tends to be closer to the center in the width direction, and the width of the absorber tends to be narrow. It becomes difficult for the absorbent body to move in the direction, and the width of the absorbent body in the front-rear central region of the crotch region can be maintained. In particular, the width on the buttock side can be obtained.

  The pressing part 15 does not necessarily extend to the front and rear end edges of the absorbent core 14, and the front-rear direction straddles over the line where the waist elastic member closest to the crotch region is disposed or the extension line of the line It is preferable that the end of the squeezing part 15 extending to the end extends to the vicinity of the front and rear end edges of the absorbent core 14. The collapse of the absorbent core can be prevented by the presence of the compressed parts at the front and rear ends of the absorbent core. Moreover, since the density of a pulp fiber is high and the pressing part is excellent in liquid diffusibility, it can carry out liquid diffusion in the wider range of an absorber. The compression part prevents the absorption core from collapsing and contributes to liquid diffusion. However, as a demerit, the end of the absorption core is stiffened (hardened), so that the movement reaching the end of the wearer's absorption core If there is, the influence of the movement is transmitted to a wider area of the absorbent core, which may promote the collapse at the joint portion with the waistline member or give a feeling of discomfort. The wearer's abdomen often protrudes, especially in infants and infants, and the buttock also protrudes in the same manner, so that the squeezed part does not extend to the edge of the absorbent core, but extends to the vicinity. Therefore, the merit by the above-mentioned pressing part can be utilized and the demerit can be avoided. Preferably, the above-mentioned merit can be utilized and the demerit can be avoided by arranging the compressed portion so as to extend to the front and rear end edges of the absorbent core 5 to 10 mm.

  The length from the crotch region side end of the compressed portion to the rear end edge of the front waistline member or the front end edge of the rear waistline member is preferably 1/10 or more of the longitudinal length of the crotch region. If it is less than 1/10, the length is insufficient and sufficient collapse cannot be suppressed.

  The squeezed portion is formed between the region between the crotch region and the region that overlaps the front waist member or the rear waist member over the line where the waist elastic member closest to the crotch region is disposed or the extension line of the line. It suffices to exist across both, and the direction in which the compressed portion extends is not particularly limited. That is, the direction in which the pressing portion extends may be the front-rear direction Y as shown in FIGS. 1, 3, and 4, the oblique direction as shown in FIGS. 5 and 6, or FIGS. 7 to 10. As shown in FIG. 4, a grid-like arrangement extending in the front, rear, left and right may be used. Preferably, the direction in which the pressing portion extends is the front-rear direction Y.

  FIG. 3 shows an example in which seven pressing parts 15 extending in the front-rear direction Y are partially arranged in the front-rear direction. A region having high rigidity is provided across a boundary line where the absorption core 14 is likely to be divided. FIG. 4 shows an example in which seven pressing parts 15 extending in the front-rear direction Y are continuously arranged. FIG. 5 shows an example in which seven pressing parts 15 extending in an oblique direction are partially arranged in the front and rear direction. FIG. 6 shows an example in which the squeezed portion 15 is arranged in a dogleg shape.

In FIGS. 3-6, the width | variety of the pressing part 15 is 1.5 mm, and a pitch is 15 mm. The absorbent core 14 has an area of 340 cm ² , superabsorbent polymer particles 3 g (88 g / m ² ), and pulverized pulp 3 to 5 g (88 to 147 g / m ² ), but is not limited thereto.

  FIG. 7 shows an example in which the pressing parts are arranged in a diamond lattice. FIG. 8 shows an example in which the pressing parts are arranged in a honeycomb lattice shape. 7 and 8 show an example in which the squeezing portion is present on the entire surface of the absorbent core, but the squeezing portion is not necessarily present on the entire surface of the absorbent core, and as shown in FIGS. 9 and 10, It may be at least at the boundary between the waistline member and the crotch region. The pattern of arrangement of the compressed parts is not limited to these, and any pattern such as a corrugated shape may be used as long as it straddles the boundary line between the waistline member and the crotch region.

  As shown in FIG. 11, an area that makes use of absorption performance in many parts of the crotch area is created by a compressed portion of another pattern in the crotch area (for example, in the horizontal direction and configured by dots and intermittent lines). It is also possible to create a region having a high rigidity.

  It straddles both the crotch region and the region that overlaps the front waist member or the back waist member over the line where the waist elastic member 10a closest to the crotch region is disposed or the extension line of the line. The squeezing part present is preferably a continuous line, but may be a dot having a pitch or an intermittent line.

  In the case where the compressed portion exists only at the boundary between the waistline member and the crotch region, the other region (mainly the crotch region) has a desired compressed portion different from the compressed portion intended to deform the absorbent core. It may be. At this time, in order not to lower the absorption performance, it is preferable that the area ratio of the compressed portion per unit area is relatively low.

  The disposable diaper of this invention can be manufactured as follows, for example. However, it is not limited to the following method. First, a front waistline member, a back waistline member, and an absorptive main body are each produced. The front waistline member and the rear waistline member can be manufactured by disposing an elastic member on the raw material sheet and cutting it into a predetermined shape. The absorbent main body has a leg-hole elastic member disposed on the leak-proof film, and an absorbent core made of a mixture of superabsorbent polymer particles and pulverized pulp is placed on the leak-proof film provided with the leg-hole elastic member. After embossing in order to form a pressing part, it can produce by superimposing a liquid-permeable top sheet on an absorption core. The produced front waistline member, rear waistline member, and absorbent main body are overlapped as shown in FIG. A pants-type disposable diaper is obtained by joining the right side edge of the rear waistline member and joining the left side edge of the front waistline member and the left side edge of the rear waistline member.

  The pressing part can be formed by embossing. Embossing may be performed while applying heat or may be performed without applying heat. Although the pressing part should just exist in the absorption core at least, you may emboss and process the laminated body of a leak-proof film, an absorption core, and a liquid-permeable top sheet, and may form a pressing part. Moreover, you may wrap an absorption core with a core wrap sheet | seat, and when an absorption core is wrapped with a core wrap sheet | seat, you may emboss from a core wrap sheet | seat and may form a pressing part.

  The disposable diaper of the present invention can be suitably used as a newborn disposable diaper, an infant disposable diaper, a disposable toilet training pant, a disposable incontinence pant, a disposable sanitary pant, an adult disposable diaper, and the like.

DESCRIPTION OF SYMBOLS 1 Pants-type disposable diaper 2 Front waistline member 3 Rear waistline member 4 Absorbent body 5 Crotch area 6 Right edge of front waistline member 7 Right side edge of rear waistline member 8 Left side edge of front waistline member 9 Left side edge of rear waistline member 10 waistline Elastic member 11 Leg elastic member 12 Liquid permeable top sheet 13 Leak-proof film 14 Absorbing core 15 Squeezed part

Claims (9)

It consists of a substantially rectangular front waistline member, a rear waistline member and an absorbent main body that are separate from each other,
The front part of the absorbent main body is overlapped and joined to the front waistline member, the rear part of the absorbent main body is overlapped and joined to the rear waistline member, and the part of the absorbent main body that does not overlap the front waistline member and the rear waistline member is the crotch Forming a zone,
The right side edge of the front waistline member and the right side edge of the rear waistline member are joined, and the left side edge of the front waistline member and the left side edge of the rear waistline member are joined to form a waist opening and two leg openings. , A pants-type disposable diaper,
A plurality of waistline elastic members are disposed in the left-right direction on the front waistline member and the back waistline member,
At least one leg-hole elastic member is disposed in the front-rear direction on each of the left and right side portions of the absorbent main body,
The waistline elastic member closest to the crotch region among the waistline elastic members is disposed from the junction between the front waistline member and the back waistline member to at least a position beyond the lateral side edge of the absorbent main body,
The absorbent main body consists of a liquid-permeable top sheet, a leak-proof film, and an absorbent core interposed between the liquid-permeable top sheet and the leak-proof film,
A part of the absorbent core overlaps with the front waistline member and / or the back waistline member,
The absorbent core has a squeezing portion, and the squeezing portion straddles the front waistline member or the rear waistline member over the line where the waistline elastic member closest to the crotch region is disposed or over the extension line of the line. In the compressed part, the pulp fibers are pressed against each other compared to the non-compressed part, and the boundary part between the waistline member and the crotch area is not compressed. A pants-type disposable diaper that also has a part .   The pants-type disposable diaper according to claim 1, wherein at least one pressing portion is present on the right side of the absorbent core, at least one on the left side of the absorbent core, and at least one on the left and right central portion of the absorbent core.   The underpants-type disposable diaper according to claim 2, wherein at least the compressed parts present on the right side and the left side intersect the waist elastic member closest to the crotch region.   The underpants type disposable diaper according to any one of claims 1 to 3, wherein the leg elastic member intersects with the waist elastic member closest to the crotch region.   The underpants type disposable diaper of any one of Claims 1-4 in which a pressing part does not exist in the front-back center part of a crotch region.   The underpants type disposable diaper of any one of Claims 1-4 in which the pressing part extended in the left-right direction exists in the front-back center part of the crotch region.   The pants-type disposable diaper according to any one of claims 1 to 6, wherein the compressed portion extends to the vicinity of the front and rear end edges of the absorbent core.   The length from the crotch region side end of the compressed portion to the rear end edge of the front waistline member or the front end edge of the rear waistline member is 1/10 or more of the longitudinal length of the crotch region. The underpants type disposable diaper of any one of Claims.   The pants-type disposable diaper according to any one of claims 1 to 8, wherein the compressed portion extends in the front-rear direction.

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