JP2008093289A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article having an absorbent core deformable into a three-dimensional shape. <P>SOLUTION: This absorbent article 1 is provided with an approximately longitudinally-long absorbent core 4 demarcated by a pair of side edges S1 and S2 extending in the longitudinal direction and a pair of end edges T1 and T2 extending in the width direction. The absorbent core 4 has a pair of notch parts N1 and N2 respectively notched from the both side edges in the front part and the rear part of the absorbent core 4 toward the width-directional inward. The absorbent core 4 is further provided with a pair of slit parts L extending in the longitudinal direction in positions in the both left/right sides in the absorbent core 4 in the width-directional inward of the notch parts N1 and N2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to various absorbent articles including disposable diapers and sanitary napkins.

  A technique is known in which notches are provided on the left and right side edges of an absorbent core of an absorbent article. For example, an absorbent garment has been proposed in which at least one foldable cutout is formed on the left and right side edges of the absorbent core, and leg elastic members are disposed at positions adjacent to the side edges of the absorbent core. (See Patent Document 1). According to this absorbent garment, the suitability of the wearer's body is excellent by making the absorbent core quilted by the notch. However, in this absorbent garment, the notch may open depending on the wearer's movement, and the liquid may leak through the opened notch.

  A technique for forming a pair of slit portions extending in one direction in the absorbent core instead of forming the cutout portion in the absorbent core is also known. For example, the second absorbent core is disposed on both sides of the first absorbent core located in the center, and a slit-like cutout is provided on the boundary between the two, thereby giving the second absorbent core an orthostatic tendency. A disposable diaper that has been proposed has been proposed (see Patent Document 2). An elastic body is disposed on the upper part of the second absorbent core that stands up, and thereby, the propensity and gathers are imparted to the second absorbent core. According to this diaper, the propensity to stand is given to the left and right sides of the absorbent core, but the propensity to stand is not given to the front and rear ends. Therefore, there is a risk of liquid leakage from before and after the absorbent core.

JP-A-63-1111151 JP-A-3-123553

  Therefore, the objective of this invention is providing the absorbent article which can eliminate the fault which the prior art mentioned above has.

The present invention, in an absorbent article comprising a substantially vertically long absorbent core defined by a pair of side edges extending in the longitudinal direction and a pair of end edges extending in the width direction,
The absorbent core is provided with a pair of notches cut inward in the width direction from both side edges of the front and rear portions of the absorbent core, and both left and right sides of the absorbent core. And the absorbent article which provided a pair of slit part extended in a longitudinal direction in the position inside the width direction rather than this notch part is provided.

  According to the absorbent article of the present invention, the absorbent core is deformed into a ship-shaped three-dimensional shape when the absorbent article is mounted by providing the absorbent core with the notch and the slit. As a result, liquid leakage hardly occurs from both the longitudinal direction and the width direction of the absorbent core.

  The present invention will be described below based on preferred embodiments with reference to the drawings. First, a first embodiment of the present invention will be described. This embodiment is an example in which the absorbent article of the present invention is applied to a pants-type disposable diaper. FIG. 1 shows a plan view of a pants-type disposable diaper that is opened at the left and right side seal portions and viewed from the top sheet side. FIG. 2 shows a cross-sectional view taken along line II-II in FIG. FIG. 3 shows an exploded perspective view of the diaper in the state shown in FIG.

  As shown in FIGS. 1 to 3, the diaper 1 of the present embodiment includes a liquid-permeable top sheet 2, a liquid-impermeable or water-repellent back sheet 3, and a liquid disposed between both sheets 2 and 3. A substantially vertically long absorbent main body 10 having a retentive absorbent core 4 and an outer packaging material 11 joined to the back sheet side (non-skin contact surface side) of the absorbent main body 10 are provided.

  The outer packaging material 11 has an hourglass shape in which both side edges are inwardly bound in the central portion in the longitudinal direction, and defines the outline of the diaper 1. The outer packaging material 11 has a crotch portion C in the central region in the longitudinal direction. The crotch part C is a part facing the crotch part of the wearer when the diaper 1 is worn. Furthermore, the outer packaging material 11 has an abdominal part A and a back part B that extend in the front-rear direction of the crotch part C, respectively. The abdominal side A and the back side B are parts facing the wearer's abdomen and back, respectively, when the diaper 1 is worn. In the following description, the ventral part A may be referred to as the front part. Moreover, the back side part B may be called a back part. The side edges A1, A2 of the ventral side A in the outer packaging material 11 and the side edges B1, B2 of the back side B are joined together, so that a diaper 1 has a waist opening (not shown) and A pair of leg openings (not shown) are formed. By this joining, a pair of side seal portions (not shown) are formed on the left and right side edges of the diaper 1 to form a pants shape. For these bondings, for example, heat sealing, high frequency sealing, ultrasonic sealing, or the like is used.

  As shown in FIG. 3, the absorbent core 4 as a constituent member of the absorbent main body 10 includes a pair of side edges S1 and S2 extending in the longitudinal direction and a pair of edges extending in the width direction, that is, the front edge T1 and the rear edge. It is a substantially vertically long rectangle defined by T2. However, it is not necessary that the absorbent core 4 is a perfect rectangle. For example, the side edges S1 and S2 may be curved curves that are concave inward in the width direction of the absorbent core 4. Alternatively, the side edges S1 and S2 may be curves that are convex outward in the width direction of the absorbent core 4 so long as they do not exceed the length of the absorbent core 4 in the longitudinal direction. The absorbent core 4 is generally composed of a mixed fiber of superabsorbent polymer particles and fiber material such as pulp. Although not shown, the mixed fiber is covered with tissue paper or a nonwoven fabric (not shown).

  Similarly to the absorbent core 4, the top sheet 2 and the back sheet 3 are also rectangular. As the surface sheet 2 and the back surface sheet 3, the same materials as those conventionally used for this type of diaper can be used. For example, as the surface sheet 2, a nonwoven fabric or a film in which a large number of holes are formed can be used. A thermoplastic film can be used as the back sheet 3. This film may have moisture permeability.

  The top sheet 2 covers the upper surface of the absorbent core 4. Furthermore, the topsheet 2 extends outward in the width direction from the left and right side edges S1, S2 of the absorbent core 4. And the extension part is wound in the lower surface side of the absorptive core 4.

  On the other hand, the back sheet 3 covers the lower surface of the absorbent core 4. Leg cuff forming sheets 9 and 9 are continuously provided on the left and right sides of the back sheet 3. The leg cuff forming sheet 9 is liquid resistant. The term “liquid resistance” as used herein broadly includes the property that the sheet 9 does not easily allow liquid to permeate, and includes, for example, all of liquid impermeability, poor liquid permeability, and water repellency. The leg cuff forming sheet 9 has a rectangular shape, and is folded in two so that a folding line 9a is formed along the longitudinal direction thereof. As shown in FIG. 3, the leg cuff forming sheet 9 in a folded state is such that the extending direction of the folding line 9 a coincides with the longitudinal direction of the back sheet 3, and the free side edge 9 b of the sheet 9 is It is bonded and fixed to the back sheet 3 so as to be positioned on the back sheet 3. That is, both sides of the back sheet 3 are sandwiched and joined by the leg cuff forming sheet 9 in a folded state.

  The leg cuff forming sheet 9 in a folded state is provided with an elastic member 8a at the position of the folding line 9a. The elastic member 8a is fixed in an expanded state between the two sheets 9 that are folded in two and stacked. Further, elastic members 8b and 8c are fixed in an extended state between the leg cuff forming sheet 9 and the back sheet 3. The elastic member 8b is disposed at a position near the side edge of the back sheet 3. On the other hand, the elastic member 8c is arranged at a position near the free side edge 9b of the leg cuff forming sheet 9.

  Each leg cuff forming sheet 9 fixed to the back sheet 3 is wound up to the top sheet side as shown in FIG. The leg cuff forming sheet 9 in a rolled up state has its longitudinal front and rear ends joined to a top sheet facing the sheet 9. Between the front and rear end portions, the leg cuff forming sheet 9 is not joined to the topsheet 2. As a result, as shown in FIG. 5 to be described later, the leg cuff 8 stands up when the elastic members 8a, 8b, and 8c contract when the diaper 1 is worn. Thereby, the outflow of the liquid in the width direction of the absorbent main body 10 is prevented. As shown in FIG. 3, in the crotch part of the diaper, the distance between the folding lines 9a and 9a is such that the two leg cuffs 8 are flattened outward in the width direction of the diaper 1. It is larger than the width of the material 11. By doing in this way, the leg cuff 8 becomes easy to follow a body in a wearer's groin part, and there exists an advantage that favorable leak-proof property can be provided.

  As shown in FIG. 1, the outer packaging material 11 extends from the front and rear end edges of the absorbent main body 10. The outer packaging material 11 has a structure in which an outer layer sheet 12 and an inner layer sheet 13 are laminated. For example, one of these sheets is stretchable and the other is not stretchable, or both are stretchable, or both are not stretchable. . As shown in FIG. 3, of the two sheets constituting the outer packaging material 11, the outer layer sheet 12 is longer in the longitudinal direction than the inner layer sheet 13. As a result, the outer layer sheet 12 extends from the front and rear edges of the inner layer sheet 13, respectively. And the extended part 12a in the outer layer sheet | seat 12 is each return | folded by the absorptive main body 10 side. The folding position F of the outer layer sheet 12 is more outward (outside in the longitudinal direction of the absorbent main body 10) than the arrangement position of the outermost member (closer to the end) among the plurality of waist elastic members 51, 51 described later. Way).

  As shown in FIG. 1, a plurality of waist elastic members 51, 51 are arranged along the waist opening end 5 a in the waist opening 5 in each of the ventral side A and the back side B. The leg opening elastic members 61 a and 61 b are also arranged along the peripheral edge of each opening 6 in the leg openings 6 and 6. The waist elastic members 51 and 51 and the leg elastic members 61 a and 61 b are fixed in an extended state between the outer layer sheet 12 and the inner layer sheet 13.

  Furthermore, a plurality of waistline elastic members 71, 71 extending in the width direction of the diaper 1 are disposed between the waist opening 5 and the leg opening 6. The waistline elastic members 71 and 71 are disposed over the entire width direction of the diaper 1. The waistline elastic members 71 and 71 are fixed in an extended state between the outer layer sheet 12 and the inner layer sheet 13. The waistline elastic members 71, 71 are arranged so as to cross the absorbent main body 10.

  As the waist elastic member 51, the leg elastic members 61a and 61b, and the waistline elastic members 71 and 71, elastic materials such as natural rubber, polyurethane resin, urethane foam resin, and hot melt elastic members are thread-like ( A thread rubber) or a band (flat rubber) is preferably used.

  As shown in FIGS. 1 and 3, the absorbent core 4 has a pair of first cutouts N <b> 1 and N <b> 1 cut inward in the width direction from both side edges in the front part of the absorbent core 4. Is provided. As shown in FIG. 3, the first cutouts N <b> 1 and N <b> 1 are provided at a position spaced a predetermined distance from the front end edge T <b> 1 of the absorbent core 4. Further, the absorbent core 4 is provided with a pair of second cutouts N2 and N2 cut inward in the width direction from both side edges in the rear part of the absorbent core 4. As shown in FIG. 3, the second cutouts N <b> 2 and N <b> 2 are provided at a position spaced a predetermined distance from the rear end edge T <b> 2 of the absorbent core 4. The two first cutouts N <b> 1 and N <b> 1 are provided at the same position in the longitudinal direction of the absorbent core 4. The two first cutouts N1 and N1 have the same V shape. The same applies to the second notch N2. With respect to the longitudinal direction of the absorbent core 4, the position between the first notch N 1 and the second notch substantially corresponds to the crotch part C of the diaper 1.

  In addition to the above-described notches N1 and N2, the absorbent core 4 is provided with a pair of slit portions L and L extending in the longitudinal direction on both left and right sides of the absorbent core. The slit portions L and L have the same length and the same width, and are symmetrical with respect to the longitudinal center line (not shown) of the absorbent core 4. The slit portions L, L are provided at positions on the inner side in the width direction than the above-described notches N1, N2. The slit portions L, L extend to the vicinity of the front end edge T1 beyond a virtual line (not shown) connecting the two first cutout portions N1, N1 provided in the front portion of the absorbent core 4. . In addition, the slit portions L, L extend beyond a virtual line (not shown) connecting the two second cutout portions N2, N2 provided in the rear portion of the absorbent core 4 to the vicinity of the rear end edge T2. It extends. At the position of the slit portions L, L, there is no fiber material or superabsorbent polymer that is a constituent material of the absorbent core 4, or even if it is present, the amount is small.

  When the slit portions L and L are wide and long, for example, when the width is 5 mm or more and the length is 2/3 or more of the absorbent core 4, the slit portions L are absorbed so as to cover the slit portion L. It is preferable to laminate a liquid diffusion layer made of a nonwoven fabric or the like on the lower surface side of the conductive core 4. Thereby, it becomes easy to take in the liquid which flows in the slit part L toward the front-back direction in the absorptive core 4, and the absorptive core 4 can be used effectively as a whole.

  By forming the cutouts N1 and N2 and the slits L and L in the absorbent core 4, the cutouts N1 and N2 and the slits L and L are folded when the diaper 1 is worn. The absorbent core 4 rises toward the upper surface side as the starting point of the music, and the entire absorbent core is deformed into a three-dimensional ship shape as shown in FIG. As a result, the rising absorbent core 4 becomes a barrier against the liquid flow in both the longitudinal direction and the width direction of the absorbent core 4, so that liquid leakage is effectively prevented.

  In particular, the above-described leg cuff 8 is provided adjacent to the absorbent core 4, and an extended elastic member 8 a is disposed on the leg cuff 8, or the extended elastic members 8 b and 8 c are provided on the lower surface side of the absorbent core 4. By disposing, as shown in FIG. 5, the pushing-up force from the lower surface side of the absorbent core 4 acts, and the absorbent core 4 becomes easier to stand up. As a result, even when a large amount of liquid is excreted at once, the liquid damming effect and the liquid absorption effect are remarkably exhibited. This effect is, in particular, between the first cutout portion N1 provided at the front portion of the absorbent core 4 and the second cutout portion N2 provided at the rear portion, so that the elastic members 8a, 8b, 8c. It becomes more remarkable by arranging. In this case, by using the elastic member 8c having a larger stretching stress than the elastic member 8a, it is difficult for the marks of the elastic member to remain on the wearer's skin, and sufficient fit can be provided. Further, by pressing the absorbent core 4 so as to be covered from the outside (that is, the lower surface side) by the elastic member 8c provided in the leg cuff 8, the absorbent core 4 can be applied to the wearer's body without hindering the movement of the absorbent core 4. Can be made to follow well.

  Further, in the present embodiment, the first notch N1 provided at the front part of the absorbent core 4 is closer to the front end edge T1 than the first notch N1, and the second notch N2 provided at the rear part. Since the waistline elastic member 71 extending in the width direction across the absorbent core 4 is extended in a position near the rear end edge T2, the pushing-up force by the waistline elastic member 71 acts on the absorbent core 4. To do. As a result, a portion of the absorbent core 4 located between the first notch N1 and the front end edge T1 and a portion located between the second notch N2 and the rear end edge T2 are present. It becomes easier to stand up.

  Further, among the plurality of waistline elastic members 71, 71, the elastic elastic stress differs between the one located near the waist opening 5 and the one located near the leg opening 6, and close to the waist opening 5. When the elastic elastic stress of the waistline elastic member 71 located at the position of the waist is larger than the elastic elastic stress of the waist elastic member 51, the front and rear end portions of the absorbent core 4 become more in line with the shape of the wearer's body. As a result, the displacement of the absorbent core 4 is less likely to occur, and liquid leakage from the ventral side and the back side can be further prevented. In the case of such a configuration, the crotch part of the absorbent core 4 can be easily formed into a three-dimensional shape by the action of the notches N1, N2 and the slits L, L, so that liquid leakage from the ventral part and the dorsal part. In addition to prevention, liquid leakage from the crotch is also prevented.

  Next, second to seventh embodiments of the present invention will be described with reference to FIGS. Regarding the points that are not particularly described with respect to these embodiments, the description with respect to the first embodiment is appropriately applied. Moreover, in FIGS. 6-10, the same code | symbol is attached | subjected to the same member as FIGS.

  In 2nd Embodiment shown to Fig.6 (a), in the absorptive core 4, slit part L, L is provided in 1st notch part N1, N1 provided in the front part, and a back part. Further, it is provided only between the second cutout portions N2 and N2. In the third embodiment shown in FIG. 6B, as in the second embodiment, the slit portions L, L are arranged on the front side of the first notches NI, N1 and the rear. It is provided only between the second notches N2 and N2 provided on the part side. In addition to this, the slit portions L, L are biased toward the rear portion. Moreover, each notch part N1, N2 is not V-shaped, and is formed by notching the absorbent core 4 in a semicircular shape. Note that, as a modification of FIG. 6B, an embodiment in which the slit portions L and L are provided so as to be biased toward the front portion can be given. Note that the sizes of the notches N1 and N2 may be the same or different depending on the intended three-dimensional shape. For example, when the rear part of the absorbent core 4 is desired to have a gentle rising shape in accordance with the shape of the wearer's buttocks, the degree of the longitudinal notch of the absorbent core 4 is cut more than the notch part N1. What is necessary is just to make the notch part N2 larger.

  When the slit portion L is provided near the front portion or the rear portion, the slit portion L is provided at the first notches NI and N1 provided at the front portion and the rear portion. It is not necessary to provide only between the second notches N2 and N2. For example, in the embodiment shown in FIG. 6B, it extends beyond the imaginary line (not shown) connecting the first notches N1 and N1 provided in the front part to the vicinity of the front edge T1. A slit portion L may be provided and the slit portion L may be biased toward the front portion.

  In the fourth embodiment shown in FIG. 7, the elastic member 8 c disposed on the lower surface side of the absorbent core 4 is located immediately below the slit portion L. The elastic member 8c extends in the same direction as the slit portion L. By arranging the elastic member 8c in this manner, the portion of the absorbent core 4 that is positioned between each slit portion L and the side edges S1, S2 can be changed according to the change in the posture of the wearer. It becomes easier to fit the body well. In the present embodiment, as long as the absorbent core 4 fits well to the wearer's body, the elastic member 8c does not need to be positioned directly below the slit portion L, and is positioned in the vicinity thereof. It may be. In particular, when the elastic member 8c is positioned directly below the slit portion L, the width of the slit portion L is preferably 5 mm or more. Thereby, the contraction force of the elastic member 8c sufficiently acts on the absorbent core 4, and the portion of the absorbent core 4 located between each slit portion L and the side edges S1, S2 is on the skin side of the wearer. Is more easily lifted, and a convex leak-proof wall is easily formed on the skin side, thereby further preventing liquid leakage.

  In 5th Embodiment shown to Fig.8 (a)-FIG.8 (c), the 2nd absorptive core 4b is partially laminated | stacked on the surface sheet opposing surface side in the absorptive core 4, and it is as a whole absorptive core. When viewed, a high basis weight region and a low basis weight region exist. By comprising in this way, a fit property with a wearer's body becomes still better. In addition, the liquid absorption capacity increases. In the following description, the absorbent core 4 may be referred to as the first absorbent core 4 in comparison with the second absorbent core 4b.

  The 1st absorptive core 4 shown to Fig.8 (a) is the same as that of 1st Embodiment. On the surface sheet facing surface side of the first absorbent core 4, the second absorbent core 4 b is partially laminated between the pair of slit portions, and the space between the slit portions is a high basis weight region. The 2nd absorptive core 4b can be comprised from the mixed fiber body of fiber materials, such as the particle | grains of a superabsorbent polymer, and a pulp similarly to the 1st absorptive core 4. FIG. The 2nd absorptive core 4b is laminated | stacked on the 1st absorptive core 4 so that the longitudinal centerline may correspond with the longitudinal centerline of the 1st absorptive core 4. FIG. The second absorbent core 4b is slightly longer than the slit portion L, and extends beyond the front and rear end edges of the slit portion L. In addition, in embodiment shown to Fig.8 (a), it replaces with partially laminating | stacking the 2nd absorptive core 4b on the surface sheet opposing surface side in the 1st absorptive core 4, and a 1st absorptive core. 4 may be partially laminated on the back sheet facing surface side. The same applies to the embodiments shown in FIG. 8B, FIG. 8C, FIG. 9 and FIG.

  The 1st absorptive core 4 shown in FIG.8 (b) is the same as that of embodiment shown in Fig.6 (a). On the surface sheet facing surface side of the first absorbent core 4, the second absorbent core 4 b is partially laminated between the pair of slit portions, and the space between the slit portions is a high basis weight region. The second absorbent core 4b is slightly longer than the slit portion L, and extends beyond the front and rear end edges of the slit portion L. And the 2nd absorptive core 4b is only between the 1st notch part N1 provided in the front part of the edge absorptive core 4, and the 2nd notch part N2 provided in the back part. Are stacked. Therefore, the high basis weight area | region in this embodiment is located between both slit parts N1, N2 between slit parts.

  The 1st absorptive core 4 shown in FIG.8 (c) is the same as that of embodiment shown in FIG.6 (b). On the surface sheet facing surface side of the first absorbent core 4, the second absorbent core 4 b is partially laminated between the pair of slit portions, and the space between the slit portions is a high basis weight region. The length of the second absorbent core 4b is longer than that of the slit portion L. With respect to the longitudinal direction of the first absorbent core 4, the position of the rear edge of the second absorbent core 4 b coincides with the position of the rear edge of the slit portion L. On the other hand, the front end edge of the second absorbent core 4b is located in the vicinity of the front end edge T1 of the first absorbent core 4 beyond the front end edge of the slit portion L. Accordingly, the high basis weight region in the present embodiment is provided biased toward the front portion of the absorbent core 4. In addition, as a modification of the present embodiment, an example in which the high basis weight region is provided so as to be biased toward the rear portion of the absorbent core 4 can be given.

  In the sixth embodiment shown in FIG. 9, the second absorbent core 4 b is partially laminated on the first absorbent core 4 in the same manner as the embodiments shown in FIGS. 8 (a) to 8 (c). Forming a high basis weight region. However, in the present embodiment, the area of the high basis weight region is increased toward the front end edge T1 of the first absorbent core 4. The 1st absorptive core 4 in this embodiment is the same as that of embodiment shown in FIG.6 (b). The second absorbent core 4 b is partially laminated between the pair of slit portions on the surface sheet facing surface side of the first absorbent core 4. The second absorbent core 4b extends toward the front end edge T1 of the first absorbent core 4 and the width gradually increases. However, the width of the second absorbent core 4b is expanded to the position of the first cutout portion N1 provided in the front portion of the first absorbent core 4, and the first absorbent core 4b exceeds this position. In the region until the front end edge T1 of the absorbent core 4 is reached, the width of the second absorbent core 4b is constant. According to this embodiment, since the front side (abdominal side) where the amount of excreted liquid is large has a high absorption capacity, liquid leakage is further effectively prevented.

  In the seventh embodiment shown in FIG. 10, the second absorbent core 4 b is partially laminated on the first absorbent core 4, as in the embodiments shown in FIGS. 8 (a) to 8 (c). Forming a high basis weight region. With respect to the longitudinal direction of the absorbent core, the position of the rear end edge in the second absorbent core 4b coincides with the position of the rear end edge of the slit portion L. On the other hand, the front end edge of the second absorbent core 4b is located in the vicinity of the first notch N1 provided in the front part of the first absorbent core 4 beyond the front end edge of the slit portion L. ing. Further, in the present embodiment, the rear part of the first absorbent core 4 is embossed, and a Y-shaped groove part G formed by compacting the absorbent core 4 is formed.

  In detail, the groove part G consists of the leg part G1 extended in the longitudinal direction of the 1st absorptive core 4, and the V-shaped branch part G2 branched into two branches from the front-end | tip part of this leg part G1. The leg G1 is located on the longitudinal center line (not shown) of the first absorbent core 4. The position of the rear end portion of the leg portion G1 coincides with the position of the rear end edge T2 of the first absorbent core 4. Moreover, the front-end | tip part of the branch part G2 has reached even the left and right both-side edges S1, S2 of the first absorbent core 4. According to this embodiment, in the wearing state of the diaper 1, the rear part of the first absorbent core 4 is bent toward the upper surface side with the groove part G as a starting point of bending, and the above-described three-dimensional shape of the boat shape is further ensured. There is an advantage that it is formed.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, although the said embodiment is an example which applied the absorbent article of this invention to the underpants type disposable diaper, the other absorbent article of this invention, for example, the deployment type disposable diaper provided with the fastening means by a fastening tape It can also be applied to incontinence pads and sanitary napkins.

  Moreover, in embodiment shown in FIGS. 8-10, although the high basic weight area | region was formed by carrying out partial lamination | stacking of the 2nd absorptive core 4b, it replaced with this and the amount of fiber accumulation of fiber materials, such as a pulp, By controlling the above, a high basis weight region may be formed by only a single absorbent core 4. Furthermore, as a constituent material of the second absorbent core 4b, a sheet made of various nonwoven fabrics manufactured by an airlaid method, an air-through method, a heat roll method, a spunbond method, a spunlace method, or the like is used and is cut into a predetermined shape. You may form a high basic weight area | region by laminating this with a 1st absorptive core.

  Further, the above embodiments can be replaced with each other.

It is the top view which opened the underpants type disposable diaper as a 1st embodiment of the present invention by the left and right side seal parts, and was seen from the surface sheet side. It is the II-II sectional view taken on the line in FIG. It is a disassembled perspective view of the diaper of the state shown in FIG. It is a perspective view which shows the absorptive core used as the three-dimensional shape of the ship shape. It is the II-II sectional view taken on the line in FIG. 1 in the mounting state of a diaper. It is a top view which shows the absorptive core in the 2nd and 3rd embodiment of this invention. It is sectional drawing (corresponding to FIG. 2) of the crotch part in the fourth embodiment of the present invention. It is the top view and sectional drawing which show the absorptive core in the 5th Embodiment of this invention. It is the top view and sectional drawing which show the absorptive core in the 6th Embodiment of this invention. It is the top view and sectional drawing which show the absorptive core in the 7th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pants type disposable diaper 2 Top sheet 3 Back sheet 4 Absorbent core 8 Leg cuff 8a, 8b, 8c Elastic member 4b 2nd absorptive core N1 1st notch part N2 2nd notch part L Slit part

Claims (10)

In an absorbent article comprising a substantially longitudinal absorbent core defined by a pair of side edges extending in the longitudinal direction and a pair of end edges extending in the width direction,
The absorbent core is provided with a pair of notches cut inward in the width direction from both side edges of the front and rear portions of the absorbent core, and both left and right sides of the absorbent core. And the absorbent article which provided the pair of slit part extended in a longitudinal direction in the position inside the width direction rather than this notch part.   The absorbent article according to claim 1, wherein the slit portion is provided only between a notch portion provided in the front portion and a notch portion provided in the rear portion.   The absorbent article according to claim 1 or 2, wherein the slit portion is biased toward the front portion or toward the rear portion.   The absorbent article according to any one of claims 1 to 3, wherein an elastic member extending in the same direction as the slit portion is disposed in a stretched state immediately below or near the slit portion.   When the 2nd absorptive core is partially laminated on the surface sheet opposing surface side or back sheet opposing surface side in the absorptive core, and it sees as the whole absorptive core, a high basic weight field and a low basic weight field exist. The absorbent article according to any one of claims 1 to 4, which is configured as described above.   The absorbent article of Claim 5 which provided the high basic weight area | region between the slit parts.   The absorbent article of Claim 5 or 6 which provided the high basic weight area | region between the notch part provided in the front part, and the notch part provided in the back part.   The absorbent article according to any one of claims 5 to 7, wherein the high basis weight region is biased toward the front part or toward the rear part.   The absorbent article in any one of Claim 1 thru | or 8 which embossed the front part or back part in the said absorptive core.   Elasticity extending in the width direction across the absorbent core at a position closer to the front edge than the notch provided at the front part or at a position closer to the rear edge than the notch provided at the rear part The absorbent article according to any one of claims 1 to 9, wherein the members are arranged in an elongated state.

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