CN211884259U

CN211884259U - Absorbent article

Info

Publication number: CN211884259U
Application number: CN201921370061.1U
Authority: CN
Inventors: 黑田贤一郎; 曾我部瑶介; 大村夏美; 野田祐树
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2018-08-31
Filing date: 2019-08-22
Publication date: 2020-11-10
Anticipated expiration: 2029-08-22
Also published as: TWM593248U; KR20200000539U

Abstract

The utility model provides an absorbent article, it is excellent to fit nature to can restrain the regional tip of rear from leaking of liquid excrement in the length direction. The absorbent article (1) has a central region (AC) facing the crotch part of the wearer when worn in plan view, and a crotch part adjacent to the rear side in the longitudinal direction of the central regionRear area (A)_B) The rear region is provided with a compressing section (14) which integrates the surface sheet (2) and the absorber (4). The compressing section has an asymmetrical shape with respect to the longitudinal center line in a plan view, and includes at least one intersecting section (P1, P2) that intersects the longitudinal center line. The absorbent article includes a longitudinal low rigidity portion (LB5) having relatively low rigidity, and the longitudinal low rigidity portion (LB5) is provided so as to extend across the intersection on the central region side of at least one intersection in the longitudinal direction in a plan view.

Description

Absorbent article

Technical Field

The utility model relates to an absorbent article.

Background

An absorbent article is known which suppresses leakage of liquid excrement excreted by a wearer of the absorbent article from an end in the longitudinal direction of the absorbent article. For example, patent document 1 discloses an absorbent article in which a compressed groove for suppressing leakage of liquid excrement is formed. The compression tank is provided with: the pair of first central grooves are disposed in the longitudinal direction in an excretory opening contact region located at the central portion in the longitudinal direction of the absorbent article, and the first annular grooves are disposed in a front region or a rear region at a position in front of or behind the excretory opening contact region. In this absorbent article, the liquid excreta flowing from the excretory opening contact region to the front region or the rear region can be drawn into the inside by the first annular groove and is less likely to migrate to the outside. This can prevent leakage of liquid excrement from the end in the longitudinal direction.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2012-50699

SUMMERY OF THE UTILITY MODEL

However, since the absorbent article is worn for a long time in contact with the crotch of the wearer, it is desirable that the absorbent article be easily deformed to follow the body shape of the wearer (i.e., have excellent fit) so as not to give the wearer a feeling of discomfort, or the like. For example, when a longitudinal centerline pressure in the width direction is applied to the central region (including the excretory opening contact region) facing the crotch of the wearer during wearing, the central region, the topsheet near the central region, and the absorbent body are positioned toward the longitudinal centerline. As a result, the central region and the rear region may be projected toward the wearer's side, that is, may be folded in a chevron shape (japanese: mountain fold り) when viewed from the front sheet side. In this case, the fit to the wearer can be improved.

Further, as the compression portion for suppressing leakage of the liquid excrement from the end portion in the longitudinal direction, for example, from the end portion on the rear side, a compression groove arranged in the rear region so as to intersect with the longitudinal center line may be considered. The compressed groove intersecting the longitudinal center line widens the flow of the liquid excrement toward the rear side in the longitudinal direction in the width direction, so that the liquid excrement is absorbed in a wide region of the absorbent body, and leakage of the liquid excrement from the end portion on the rear side can be suppressed. As the shape of the compression portion, various shapes according to the purpose and the application can be considered, and examples thereof include a curved line, a straight line, a shape in which these are combined, a ring shape, and the like, and also include a shape asymmetrical with respect to the longitudinal center line in a plan view (a shape not axisymmetric with respect to the longitudinal center line). For example, in patent document 1, in order to impart an absorbent article with an appealability to alleviate a feeling of depression of the wearer in a physiological period, a shape such as a flower shape or a heart shape is adopted. Further, for example, in the case of manufacturing an absorbent article, in order to cope with a case where the compressing section is displaced in the width direction when the absorbent article is conveyed so that the width direction thereof is parallel to the conveyance direction MD, the shape of the compressing section may be asymmetric.

Here, in patent document 1, the first annular groove is considered as a compression groove in the rear region. The first annular groove has at least one bending point, and the bending point intersecting the longitudinal center line is one or less. According to the arrangement of the bending points, the first annular groove has an asymmetrical shape in a plan view with respect to the longitudinal center line. For example, patent document 1 discloses an asymmetric heart-shaped groove disposed obliquely with respect to a longitudinal center line as a first annular groove.

In the first annular groove, when the central region and the rear region are folded in a chevron shape when viewed from the front sheet side as described above, it is preferable that the fold line of the chevron shape fold is located on the longitudinal center line. In this case, the top of the chevron like fold is located along the seam of the buttocks, so the fit can be improved and leakage of liquid excrement can be suppressed. However, since the first annular groove is asymmetric with respect to the longitudinal center line in the rear region as described above, there is a possibility that the fold line passing through the first annular groove may be displaced from the longitudinal center line due to the influence of the shape of the first annular groove. Thus, the top portion of the herringbone folding is displaced from the seam of the hip portion, and the wearer feels uncomfortable, unpleasant, or the like, and the fit is deteriorated, and leakage of liquid excrement may occur. This also applies to the case where the compression groove is not an annular groove.

The purpose of the present invention is to provide an absorbent article which has excellent fit and can suppress leakage of liquid excrement from the end portion of the rear region in the longitudinal direction.

The absorbent article of the present invention is as follows. (1) An absorbent article having a longitudinal direction and a width direction, and having a longitudinal direction center line passing through a center in the width direction and extending in the longitudinal direction, and a width direction center line passing through the center in the length direction and extending in the width direction, the absorbent article comprising a front sheet, a back sheet, and an absorber positioned between the front sheet and the back sheet, wherein the absorbent article has a central region facing a crotch portion of a wearer when worn in a plan view, and a rear region adjacent to a rear side in the length direction of the central region, the rear region is provided with a compressed portion integrating the front sheet and the absorber, the compressed portion has an asymmetric shape with respect to the longitudinal direction center line when viewed in a plan view, and includes at least one intersection portion intersecting the longitudinal direction center line, the absorbent article includes a longitudinal low rigidity portion having a relatively low rigidity, and the longitudinal low rigidity portion extends so as to straddle the intersection portion on the central region side of the at least one intersection portion along the longitudinal direction in a plan view.

In the absorbent article of the present invention, since the compressed portion is formed in the rear region, it is possible to suppress leakage of the liquid excrement transferred from the central region to the rear region from the end portion of the rear region. In this case, the compressed portion in the rear region is asymmetric with respect to the longitudinal center line (is not axisymmetric with respect to the longitudinal center line). However, the longitudinal low rigidity portion extends so as to straddle the intersection of the compression portions in the longitudinal direction, that is, so as to overlap the intersection in a plan view. Here, since the longitudinal low rigidity portion has relatively low rigidity, the rear region has a characteristic of being easily bent in the longitudinal direction toward the width direction in the longitudinal direction at the longitudinal low rigidity portion. Therefore, when the central region and the rear region are folded in a herringbone pattern when viewed from the front sheet side during wearing, the rear region is bent at the low rigidity portion in the longitudinal direction across the intersection of the compressed portions, and the herringbone pattern is formed. That is, a chevron fold along the lengthwise centerline may be formed. This makes it possible to position the top of the chevron fold at the position of the hip joint, to improve the fit, and to suppress leakage of liquid excrement from the end of the rear region.

The absorbent article of the present invention may be (2) the absorbent article according to (1), wherein the longitudinal low rigidity portion is formed at least in a range overlapping with the compressed portion in the width direction on the longitudinal center line in the longitudinal direction.

In the absorbent article of the present invention, the longitudinal direction low rigidity portion is formed in a range where a longitudinal direction center line on the longitudinal direction center line and the compressed portion overlap in the width direction. That is, the longitudinal direction low rigidity portion is formed in a range in which a projection of the compression portion on the longitudinal direction center line overlaps with the longitudinal direction center line when the compression portion is projected on the longitudinal direction center line. In other words, the longitudinal low rigidity portion is formed in the range of the maximum width in the longitudinal direction of the region where the compressed portion exists. In this way, the lengthwise low rigidity portion is sufficiently long, and therefore, regardless of the shape of the compressed portion, a herringbone fold along the lengthwise center line can be stably formed. This can further improve the fit.

The absorbent article of the present invention may be (3) the absorbent article according to (1) or (2) above, wherein the longitudinal low rigidity portion is formed by a low unit area weight portion having a relatively low unit area weight on the absorber.

In the absorbent article, the longitudinal direction low stiffness portion is formed by the low basis weight portion of the absorbent body. Therefore, the rear region can be easily bent in the width direction in the longitudinal direction by the low rigidity portion in the lateral direction. This makes it possible to more stably form the zigzag fold in the low-rigidity portion in the longitudinal direction, and further improve the fit.

The absorbent article of the present invention may be (4) the absorbent article of any one of the above (1) to (3), further comprising a width direction low rigidity portion having a relatively low rigidity on both sides in the width direction in the longitudinal direction low rigidity portion in the rear region, the width direction low rigidity portion extending in parallel with the width direction center line so as to be separated from the longitudinal direction low rigidity portion.

When the herringbone folding along the center line in the length direction is formed in the rear region, the end of the rear region may be separated from the curved surface of the buttocks due to the degree of the herringbone folding. To cope with such a situation, it is conceivable: in the rear region, a low-rigidity portion is continuously formed parallel to the center line in the width direction from one end edge in the width direction to the other end edge so that the end portion of the rear region does not separate from the curved surface of the hip portion. However, the movement of the rear side portion of the low rigidity portion is intensified or increased due to the posture and movement of the wearer, so that the low rigidity portion may be deformed, and the chevron fold of the rear side portion may be displaced from the longitudinal center line.

Therefore, in the absorbent article of the present invention, the widthwise low rigidity portion extending along the widthwise center line is provided on both sides in the widthwise direction of the lengthwise low rigidity portion, and the lengthwise low rigidity portion and the widthwise low rigidity portion are separated from each other. The low rigidity portion in the width direction makes the rear region more easily bent along the curved surface of the buttocks, and the rear region can be brought into contact with the buttocks up to the end portion thereof. Further, by separating the longitudinal direction low rigidity portion and the width direction low rigidity portion, that is, by having a portion which is not low in rigidity between them, it is possible to suppress the widthwise low rigidity portion from going out of shape, and the chevron fold of the portion on the rear side thereof can be made not to be displaced from the longitudinal direction center line. This can improve the fit and suppress leakage of liquid excrement from the end of the rear region.

The absorbent article of the present invention may be (5) the absorbent article according to (4), wherein the widthwise low rigidity portion is formed of another low basis weight portion having a relatively low basis weight on the absorbent member.

In the absorbent article, the widthwise low stiffness portion is formed by the low basis weight portion of the absorbent body. Therefore, the rear region can be made to follow the buttocks more stably by the low-basis-weight portion of the width-direction low-rigidity portion, and the deformation of the width-direction low-rigidity portion can be further suppressed by the portion between the longitudinal-direction low-rigidity portion and the width-direction low-rigidity portion, which is not low-rigidity portion. This can further improve the fit.

The absorbent article of the present invention may be (6) the absorbent article of any one of (1) to (5), wherein the dimension in the width direction of the longitudinal direction low rigidity portion is larger than the dimension in the width direction of the compressed portion.

In the absorbent article of the present invention, the dimension in the width direction of the longitudinal low rigidity portion is larger than the dimension (thickness) in the width direction of the compressed portion, and therefore, when the longitudinal low rigidity portion is folded into a herringbone shape, the shape of the compressed portion can be made less likely to be affected. This makes it possible to form the chevron fold more stably in the longitudinal direction low rigidity portion. This can further improve the fit.

The absorbent article of the present invention may be (7) the absorbent article of any one of (1) to (6), wherein the compressed portion has an annular shape in plan view.

In the absorbent article of the present invention, the compressed portion has an annular shape, and therefore, the liquid excrement can be drawn into the compressed portion and hardly transferred to the outside, and leakage of the liquid excrement from the end portion on the rear side in the longitudinal direction can be further suppressed. However, in this case, the rigidity of the annular region of the compression portion is increased, and it is considered that the rear region is hard to be folded in a herringbone shape. However, in the present absorbent article, since the rear region includes the longitudinal direction low rigidity portion, and is less likely to be affected by the rigidity of the region of the compressed portion, the rear region can be folded in a herringbone manner. This can further improve the fit and suppress leakage of liquid excrement from the end of the rear region.

The absorbent article of the present invention may be (8) the absorbent article of (7), wherein the compressed part has at least two convex parts protruding toward the inside or the outside of the annular shape in a part of the annular shape.

In the case where the compressed portion has at least two convex portions protruding toward the inside or the outside of the annular shape in a part of the annular shape, a bending point is generated between one convex portion and the other convex portion. Since the bending point of the compressed portion is likely to be the base point of the chevron folding, the fold line of the chevron folding may be displaced from the longitudinal center line. However, in the present absorbent article, since the rear region includes the longitudinal direction low rigidity portion and is less likely to be affected by the bending point of the compressed portion, the folded line of the chevron folding can be in a chevron folded state along the longitudinal direction center line. This can further improve the fit and suppress leakage of liquid excrement from the end of the backward region.

The absorbent article of the present invention may be (9) the absorbent article of any one of (1) to (8), wherein a surface of the absorbent body on the non-skin surface side corresponding to the intersection portion has a recessed portion recessed toward the skin side.

In the absorbent article of the present invention, since the absorbent body has the concave portion on the surface on the non-skin surface side corresponding to the intersection portion on the absorbent body, the absorbent body can be easily deformed convexly upward along the buttocks, and the rear region can be more easily brought into a state of being folded in a herringbone shape. This can further improve the fit and suppress leakage of liquid excrement from the end of the backward region.

According to the present invention, an absorbent article can be provided which has excellent fit and which can suppress leakage of liquid excrement from the end portion of the rear region in the longitudinal direction.

Drawings

Fig. 1 is a plan view showing an example of the structure of a sanitary napkin according to an embodiment.

Fig. 2 is a sectional view taken along line II-II of fig. 1.

Fig. 3 is a sectional view taken along the line III-III of fig. 1.

Fig. 4 is a schematic view for explaining the effects of the sanitary napkin according to the embodiment.

Fig. 5 is a schematic view for explaining the effects of the sanitary napkin according to the embodiment.

Fig. 6 is a schematic diagram showing a configuration example of a manufacturing apparatus of a sanitary napkin according to an embodiment.

Fig. 7 is a plan view showing another configuration example of the sanitary napkin according to the embodiment.

Fig. 8 is a plan view showing another configuration example of the sanitary napkin according to the embodiment.

Detailed Description

The absorbent article according to the embodiment will be described by taking a sanitary napkin as an example. However, the type and use of the absorbent article of the present invention are not limited to this example, and the present invention can be applied to other absorbent articles without departing from the scope of the subject matter of the present invention. Examples of other absorbent articles include panty liners, light incontinence pads, and disposable diapers.

Fig. 1 to 3 are views showing a configuration example of a sanitary napkin 1 according to an embodiment. However, fig. 1 is a plan view showing a state where the sanitary napkin 1 is unfolded, fig. 2 is a sectional view taken along the line II-II in fig. 1, and fig. 3 is a sectional view taken along the line III-III in fig. 1. The sanitary napkin 1 of the present embodiment has a longitudinal direction L, a width direction W, and a thickness direction T that are orthogonal to each other. In the sanitary napkin 1 depicted in fig. 1, the upper side and the lower side are respectively defined as the longitudinal directionThe front and rear sides of L are left and right sides in the width direction W, and the front and rear sides of the plane of the paper are upper and lower sides in the thickness direction T. The sanitary napkin 1 has a longitudinal centerline C extending in the longitudinal direction L through the center in the width direction W_L(virtual line), and a width-direction center line C extending in the width direction W through the center of the longitudinal direction L_W(phantom line). Will be oriented toward the longitudinal center line C_LDirection and longitudinal center line C of_LThe sides are respectively inward and inward in the width direction W and are far from the center line C in the length direction_LTowards and away from the longitudinal center line C_LThe sides are outward and outward in the width direction W, respectively. On the other hand, will be oriented toward the width direction center line C_WDirection of (2) and a widthwise center line C_WThe sides are respectively taken as the inner side and the inner side of the length direction L and are far away from the center line C in the width direction_WTowards and away from the width direction center line C_WThe sides are respectively outward and outward in the longitudinal direction L. The sanitary napkin 1 placed on a plane including the longitudinal direction L and the width direction W as viewed from above in the thickness direction T is referred to as "planar shape", and the shape grasped in the planar view is referred to as "planar shape". Any direction in a plane including the longitudinal direction L and the width direction W is referred to as a "plane direction". When the sanitary napkin 1 is worn by a wearer placed on the sanitary napkin, the proximal and distal sides facing the skin surface of the wearer in the thickness direction T are referred to as the "skin side" and the "non-skin side". These definitions are also common to the respective materials of the sanitary napkin 1.

In the present embodiment, the sanitary napkin 1 (excluding the flap portions) is substantially rectangular in shape that is longer in the longitudinal direction L and shorter in the width direction W in a plan view, and has a shape in which both end edges in the longitudinal direction L are substantially semicircular. However, the shape is not particularly limited as long as it is longer in the longitudinal direction L and shorter in the width direction W, and examples thereof include a rounded rectangle, an oval shape, an hourglass timer shape, and the like. The sanitary napkin 1 includes flaps 6 extending outward in the width direction W from the substantially rectangular portions, and the flaps 6 have a substantially trapezoidal shape. However, the shape of the wing portion 6 may be, for example, a semicircular shape or a semi-elliptical shape.

The sanitary napkin 1 includes a liquid-permeable front sheet 2 constituting a skin-side surface, a liquid-impermeable back sheet 3 constituting a non-skin-side surface, and a liquid-absorbent and liquid-retentive absorbent member 4 disposed between the front sheet 2 and the back sheet 3. In the present embodiment, the absorbent body 4 includes an absorbent core 4a and a core wrap 4b covering the absorbent core 4 a. In the sanitary napkin 1, the surface on the non-skin side of the top sheet 2 is bonded to the surface on the skin side of the absorbent body 4 with an adhesive, the surface on the non-skin side of the absorbent body 4 is bonded to the surface on the skin side of the back sheet 3 with an adhesive, and the edge portion (including the flap portion 6) of the surface on the non-skin side of the top sheet 2 and the edge portion (including the flap portion 6) of the surface on the skin side of the back sheet 3 are bonded with an adhesive or by heat sealing. In addition, the sanitary napkin 1 may have a plurality of absorbent bodies (or a plurality of absorbent cores) laminated thereon. The sanitary napkin 1 may further include an auxiliary sheet or a pair of side sheets. In this case, the auxiliary sheet is disposed, for example, between the topsheet 2 and the absorbent body 4, and the pair of side sheets are disposed, for example, at both ends in the width direction W on the non-skin side on the topsheet 2 or the auxiliary sheet so that the inner ends in the width direction W overlap each other. In this case, the absorbent body 4 is located between the front sheet 2 or the auxiliary sheet and the pair of side sheets and the back sheet 3. The sanitary napkin 1 may further include an exterior sheet on the non-skin side of the back sheet 3. In the present embodiment, the sanitary napkin 1 further includes fixing portions 7 and 8.

The sanitary napkin 1 is provided with a excretory opening contact region XA at the center in the width direction W slightly ahead of the center in the longitudinal direction L in a plan view. The excretory opening abutment region XA is a region that faces or abuts the excretory opening of the wearer when the sanitary napkin 1 is worn. The excretory opening abutment region XA is provided depending on the type and use of the absorbent article. The excretory opening contact region XA is set slightly forward of the center of the absorbent body 4 in the longitudinal direction L, by a length of about 1/4 to 1/2 of the total length of the absorbent body 4 in the longitudinal direction L, and by a width of about 1/2 to 1/3 of the total length of the absorbent body 4 in the width direction W, at substantially the center of the absorbent body 4 in the width direction W.

In the present embodiment, the sanitary napkin 1 has a front region a from the front to the rear in the longitudinal direction L in a plan view_FCentral area A_CAnd a rear area A_B. Central area A_CIs a region that faces the crotch of the wearer when worn, and in the present embodiment includes the excretory opening abutment region XA. Front area A_FAnd a rear area A_BIs connected with the respective central area A_CThe front and rear sides in the longitudinal direction L of the vehicle body.

The sanitary napkin 1 has a rear region A_B(rearward of the excretory opening contact region XA in the longitudinal direction L), and a compressing section 14 that integrates the topsheet 2 and the absorbent body 4. The compressed portion 14 compresses the topsheet 2 and the absorbent body 4 in the thickness direction T to form a groove shape. The compression part 14 has a center line C in the longitudinal direction in plan view_LAsymmetrical shape, i.e. heart shape. The compressing part 14 includes a longitudinal center line C_LTwo intersecting parts P1, P2. However, the shape of the compressing unit 14 is not limited to this example, as long as it is in the rear area a_BAnd the longitudinal center line C_LAre arranged crosswise relative to the longitudinal center line C_LAsymmetrical shape (with respect to the longitudinal center line C_LNot axisymmetric) with the longitudinal center line C_LAt least one crossing portion may be crossed. Such a constriction portion 14 is preferable because it spreads the flow of the liquid excrement toward the rear in the longitudinal direction L in the width direction W, allows the liquid excrement to be absorbed in a wide area including both end regions in the longitudinal direction L of the absorbent body 4, and can suppress leakage of the liquid excrement from the rear end region. Further, the asymmetric shape is preferable because, when the width direction W of the sanitary napkin 1 is transported in parallel to the transport direction MD at the time of manufacturing the sanitary napkin 1, the compressed portion 14 can be displaced in the width direction W to such an extent that the displacement is not noticeable when the displacement is not a problem in performance.

The compression part 14 is formed in the shape ofA slot-like or punctiform recess of the like trim. The shape of the compression part 14 may be, for example, a curved shape, a linear shape, a dot shape, a combination thereof, a circular shape, an elliptical shape, a polygonal shape, or the like in a plan view. Among them, in a plan view, the shape of a ring such as a heart (the present embodiment), a circle, an ellipse, a polygon, a star, a flower, a leaf, a face, or a biological figure is preferable. Can flow from the excretory opening abutment region XA to the rear region A_BThe liquid excreta of (2) is introduced into the inside thereof and hardly migrates to the outside, and the wearer can be relieved of the feeling of depression in the physiological period by giving a pleasant feeling to the shape. In such a ring-like shape, at least two portions protruding toward the inside or the outside of the ring-like shape may be provided in one portion thereof, and a bending point may be provided between the two portions. For example, in the heart-shaped compression part 14, there are two convex portions 14Q1, 14Q2 that project outward with a bending point R between them.

In the present embodiment, the sanitary napkin 1 further includes compressed portions 11 to 15 formed by compressing the topsheet 2 and the absorbent member 4 in the thickness direction T into a groove shape. The pair of compressing

portions

12, 12 and 13, 13 are located on both outer sides in the width direction W of the excretory opening abutment region XA, and extend continuously or intermittently. For diffusing the liquid excrement diffused in the width direction W in the longitudinal direction L. The compression portion 11 is located forward in the longitudinal direction L of the drain port abutment region XA, and is formed in an annular shape. The liquid excrement flows forward in the longitudinal direction (L) and spreads in the width direction (W), and leakage of the liquid excrement from the rear end is suppressed. The compressed portion 15 is located in the drain port abutment region XA and is formed in a dot shape. For spreading the liquid excrement in the thickness direction T. The

compression parts

12, 13, 15 are located in the central area A_CThe compressing part 11 is located in the front area A_F. The shape of the compressing portions 11 to 13, 15 is not particularly limited as long as the liquid excrement discharged to the excretory opening contact region XA can be diffused over a wider range. The sanitary napkin 1 may not include at least one of the compressed parts 11 to 13, 15.

The absorbent body 4 is a layer having liquid absorbing performance and liquid retaining performance, and in the present embodiment, has a shape that is long in the longitudinal direction L and has both ends in the longitudinal direction L in a substantially semicircular shape in a plan view. The absorbent body 4 includes a low-rigidity portion LB having a relatively low rigidity and a high-rigidity portion HB having a relatively high rigidity, which is a portion other than the low-rigidity portion LB.

The low-rigidity portion LB of the absorbent body 4 is located in the rear area A in plan view_BIncluding along the length direction L and the length direction center line C_LAnd longitudinal low rigidity portions LB5 extending in an overlapping manner. The longitudinal low rigidity portion LB5 extends across the intersections P1 and P2 (the longitudinal center line C of the compression portion 14) in the longitudinal direction L in a plan view_LIntersecting portions) of the central regions A_CThe side intersection P1 extends. In the present embodiment, the longitudinal low rigidity portion LB5 is formed in a belt shape or a rectangular shape along the longitudinal direction L, and has a front low rigidity portion LB5a located at the front in the longitudinal direction L and a rear low rigidity portion LB5b located at the rear, from the vicinity of the excretory opening abutment region XA to the end edge in the longitudinal direction L. However, the longitudinal low rigidity portion LB5 is not limited to this example, and may be a region near the center a at the intersection of the compression portions 14 in the longitudinal direction L in a plan view_CThe intersection of the sides may extend. Thus, when the absorbent body 4 is deformed, the longitudinal direction low rigidity portion LB5 can be used as a base point more easily than the compressed portion 14.

In the present embodiment, the longitudinal low rigidity portion LB5 is formed at least on the longitudinal centerline C in the longitudinal direction L_LUpper, longitudinal center line C_LA range overlapping with the compression portion 14 in the width direction W. For example, as shown in fig. 1, the longitudinal center line C is projected to the compressing section 14_LIn the above case, the projected image is projected onto the longitudinal center line C_LPoint Z1 to point Z2. Therefore, the longitudinal low rigidity portion LB5 is formed at least on the longitudinal center line C_LUpper, longitudinal center line C_LA range overlapping the projection of the compression unit 14, i.e., a range from the point Z1 to the point Z2. Further, the dimension (length) in the longitudinal direction L of the longitudinal direction low rigidity portion LB5 is not less than at least from the point Z1 toThe size (length) of point Z2. This can suppress the influence of the compressing portion 14 and deform the absorbent body 4 with the longitudinal direction low rigidity portion LB5 as a base point.

In the present embodiment, the dimension (width) in the width direction W of the longitudinal direction low rigidity portion LB5 is larger than the dimension (thickness) of the width of the compression portion 14. For example, as shown in fig. 3, the dimension D1 in the width direction W of the longitudinal low rigidity portion LB5 (front low rigidity portion LB5a) is larger than the dimension D2 in the width direction W of the compression portion 14. Thus, deformation of the absorbent body 4 from the longitudinal direction low rigidity portion LB5 is more likely to occur than deformation of the absorbent body 4 from the compressed portion 14.

In the present embodiment, the low rigidity portion LB of the absorbent body 4 further includes the widthwise low rigidity portions LB4, LB4, and the widthwise low rigidity portions LB4, LB4 are located in the rear region a in a plan view_BAnd a widthwise center line C spaced apart from the lengthwise center line LB5 on both sides of the lengthwise low rigidity portion LB5 in the widthwise direction W_WAre arranged extending in parallel. However, the meaning of the separation from the longitudinal low rigidity portion LB5 on both sides in the width direction W includes not only the case of separation from the longitudinal low rigidity portion LB5 in parallel with the width direction W but also the case of separation from the longitudinal low rigidity portion LB5 in a range (however, a range not reaching the drain port contact region XA) separated from the inner end edge of the longitudinal low rigidity portion LB5 in the longitudinal direction L in the range of about 1/3 of the length of the longitudinal low rigidity portion LB5 in parallel with the width direction W. The range of about 1/3 of the length of the longitudinal low rigidity portion LB5 means a range that is easily reached by the chevron fold at the longitudinal low rigidity portion LB 5. The distance separating the widthwise low rigidity portion LB4 from the lengthwise low rigidity portion LB5 may be, for example, 1/10 to 1/2, preferably 1/8 to 1/4, of the width in the widthwise direction W of the absorbent body 4. However, the width in the width direction W in the absorbent body 4 is the width at the position of the widthwise low rigidity portion LB4 in the longitudinal direction L. In this case, high rigidity portions HBS and HBS having higher rigidity than those of the low rigidity portions LB4 and LB5 are formed between the longitudinal direction low rigidity portion LB5 and the width direction low rigidity portions LB4 and LB 4.

In the present embodiment, the low-rigidity portion LB of the absorbent body 4 further includes a center line C in the width direction_WAnd widthwise low rigidity portions LB 1-LB 3, LB6 extending in parallel. The widthwise low rigidity portion LB1 is located in a front region a of the absorbent body 4 so as to extend in the widthwise direction W by a predetermined width_FAnd the central region A_CCentral area a near the boundary of (a)_C. For making the front area A_FCan be arranged along the body. The widthwise low rigidity portions LB2 and LB2 are located in the central region a of the absorbent body 4 so as to extend in the widthwise direction W by a predetermined width_CExcept for the center portion (the excretory opening abutment region XA) in the width direction W. The widthwise low rigidity portions LB3 and LB3 are respectively in the central region a of the absorbent body 4_CBoth sides of the center portion (the excretory opening abutment region XA) except for the widthwise direction W extend in the widthwise direction W with a predetermined width, and are disposed at a distance from the rear of the low rigidity portions LB2, LB2 in the longitudinal direction L. For making the central area A_CCan be arranged along the body. The widthwise low rigidity portion LB6 is located in the rear region a of the absorbent body 4_BIs arranged to extend in the width direction W with a predetermined width at a substantially central portion in the longitudinal direction L. For making the rear area A_BCan be arranged along the body.

In the present embodiment, the low rigidity portions LB1 to LB4 and LB6 are all arranged to reach the end edge in the width direction W on the absorbent body 4. At least one of the low rigidity portions LB1 to LB4 and LB6 may not reach the end edge of the absorbent body 4. Further, in the front low rigidity portion LB5a, the front end portion in the longitudinal direction L extends between the width direction low rigidity portions LB4 and LB4, and the rear end portion is connected to the width direction low rigidity portion LB 6. The front end may not extend between the width direction low rigidity portions LB4 and LB4, and the rear end may not be connected to the width direction low rigidity portion LB 6. Further, the front end of the rear low rigidity portion LB5b in the longitudinal direction L is connected to the width low rigidity portion LB6, and the rear end reaches the end edge of the absorbent body 4. The front end portion may not be connected to the widthwise low rigidity portion LB6, and the rear end portion may not reach the end edge of the absorbent body 4.

On the other hand, in the present embodiment, the high rigidity portion HB includes high rigidity portions HB1 to HB 4. The high rigidity portion HB1 is located forward in the longitudinal direction L relative to the widthwise low rigidity portion LB1 in the absorbent body 4. The high rigidity portion HB2 is located at a position between the widthwise low rigidity portion LB1 and the widthwise low rigidity portion LB6 in the longitudinal direction L (except for the widthwise low rigidity portions LB2 and LB3) in the absorbent body 4. The high rigidity portions HB3 and HB4 are located on the left and right sides in the width direction W of the widthwise low rigidity portion 5, behind the widthwise low rigidity portion LB6 in the longitudinal direction L in the absorber 4. The high rigidity portions HBS and HBS are located between the width direction low rigidity portions LB4 and LB4 or between the width direction low rigidity portions LB4 and LB4 and the front low rigidity portion LB5a in the high rigidity portion HB 2.

In the present embodiment, each low stiffness portion LB is a portion of the absorbent material having liquid absorbability and liquid retentivity, such as hydrophilic fibers or superabsorbent polymers, constituting the absorbent body 4, which has a relatively low weight per unit area, and may be referred to as a low weight portion. On the other hand, the high rigidity portion HB is a portion of the absorbent material constituting the absorbent body 4 having a relatively high weight per unit area, and may be referred to as a high weight portion. In this case, for example, as shown in fig. 3, the longitudinal direction low rigidity portion LB5 (front low rigidity portion LB5a) and the width direction low rigidity portion LB4 are relatively thin, and the high rigidity portion HBS is relatively thick. In addition, the portion (position) of the absorbent body 4 corresponding to the low basis weight portion in the sanitary napkin 1 has a lower rigidity than the portion (position) corresponding to the high basis weight portion, and therefore is relatively easily bent.

The basis weight of the absorbent body was measured by the following method. (1) A5 mm × 10mm portion was cut out from the sheet to obtain a sample. (2) The sample was dried in an air atmosphere of 100 ℃ or higher. (3) The mass of the sample was measured. (4) The measured value of the mass was divided by the area of the sample to obtain the weight per unit area of the sample. (5) The average of the weights per unit area of the 10 samples was defined as the weight per unit area of the sheet.

However, the low rigidity portion LB is not limited to this example, and may be realized, for example, by a portion obtained by adding at least one cut (for example, half cut or full cut) in the thickness direction T to the absorbent body 4, a portion having a relatively low density of the absorbent material in the absorbent body 4, or the like. In this case, the high rigidity portion HB is a portion of the absorbent body 4 having no cut or a portion of the absorbent body 4 having a high density of the absorbent material.

In the present embodiment, the compression units 11 to 15 include: a low-density portion LPA formed at a shallow position and having a relatively low fiber density by being weakly compressed, and a high-density portion HPA formed at a deep position and having a relatively high fiber density by being strongly compressed. However, the references of "shallow" and "deep" are the skin-side surface of the front sheet 2. The low-density portion LPA and the high-density portion HPA may be referred to as a bottom at a shallow position and a bottom at a deep position on each compression portion. The low-density sections LPA and the high-density sections HPA of the compression sections 11 to 15 are positioned in the absorbent core 4a of the absorbent body 4. However, the high-density portion HPA may reach the non-skin-side core chip 4 b. For example, as shown in fig. 3, the compression section 14 includes low-density sections LPA formed in a shallow position and high-density sections HPA formed in a deep position in the width direction low-rigidity section LB4 and the length direction low-rigidity section LB5 (front low-rigidity section LB5 a).

In the present embodiment, the absorbent body 4 has a recessed portion BTA recessed toward the skin side on the surface on the non-skin surface side corresponding to the intersection portion P1. For example, as shown in fig. 3, in the longitudinal direction low rigidity portion LB5 (front low rigidity portion LB5a), the compression portion 14 and the longitudinal direction center line C_L(including the longitudinal centerline C in FIG. 3)_LPerpendicular to the width direction W of the flat surface F_T) The surface on the non-skin surface side corresponding to the intersecting portion P1 forms a recessed portion BTA recessed toward the skin side. Therefore, the intersection P1 is located at the front low rigidity portion LB5a, at the compression portion 14, and at the notch BTA, and therefore the absorber 4 is easily deformed with the intersection P1 as a starting point.

In the present embodiment, the thickness of each low rigidity portion LB is, for example, 0.8 to 20mm, and the thickness of each high rigidity portion HB is, for example, 1 to 30 mm. The height from the back sheet 3 of each low-density portion LPA may be, for example, 0.3 to 10mm, the height from the back sheet 3 of each high-density portion HPA may be, for example, 0.2 to 9mm, and the height from the back sheet 3 of each recessed portion BTA may be, for example, 0.2 to 4 mm.

The number, position, and shape of the high rigidity portions, the low rigidity portions, and the compression portions are shown as examples, and the present invention is not limited to these examples.

As materials of the top sheet 2, the absorbent body 4, the back sheet 3, the auxiliary sheet, and the fixing portions 7 and 8, known materials generally used for the sanitary napkin 1 can be used. Examples of the material of the top sheet 2 include nonwoven fabric, woven fabric, synthetic resin film having liquid-permeable holes formed therein, and composite sheets of these materials. Examples of the nonwoven fabric include natural fibers (for example, cotton), regenerated fibers, inorganic fibers, and synthetic resin fibers. The weight per unit area of the surface sheet 2 may be, for example, 5g/m²～100g/m²Preferably 20g/m²～50g/m². The thickness of the surface sheet 2 may be, for example, 0.2 to 5 mm. Examples of the material of the absorbent body 4 include water-absorbent fibers such as pulp fibers and synthetic fibers, and Super Absorbent Polymers (SAP). The basis weight of the fibers of the absorbent body 4 may be, for example, 5 to 1000g/m². Among them, the weight per unit area of the high rigidity portion (high weight per unit area) HB is, for example, 150 to 1000g/m²Preferably 300 to 600g/m from the viewpoint of absorbency and wearability². On the other hand, the weight per unit area of the low-rigidity portion (low-basis-weight portion) LB may be, for example, 50 to 300g/m²Preferably 50 to 150g/m from the viewpoints of absorbency and deformability². The weight per unit area of the super absorbent polymer may be, for example, 0 to 500g/m²Preferably 10 to 400g/m². The thickness of the absorber 4 is, for example, 1 to 40mm, preferably 5 to 30 mm. When the absorbent core 4 includes an absorbent core and a core-covering sheet, the absorbent core may be made of water-absorbent fibers or a super-absorbent polymer, and the core-covering sheet may be made of liquid-permeable hydrophilic fibers such as tissue. The material of the back sheet 3 may, for example, be one subjected to a water repellent treatmentWoven fabric, synthetic resin film, composite sheet of nonwoven fabric and synthetic resin film, SMS nonwoven fabric, and the like. Examples of the material of the auxiliary sheet include nonwoven fabric, pulp fiber, and synthetic fiber. Examples of the material of the fixing portions 7 and 8 include adhesives such as styrene-butadiene copolymers. As the adhesive for bonding between the respective materials, a known material that can be used for the sanitary napkin 1 can be used, and for example, a hot melt adhesive can be used.

Next, the operation and effects of the sanitary napkin 1 according to the present embodiment will be described. Fig. 4 is a schematic diagram for explaining the operation and effect of the sanitary napkin 1 according to the embodiment. Unlike the sanitary napkin 1 of the embodiment, fig. 4(a) shows a rear region a of the sanitary napkin 1a having no longitudinal low rigidity portion LB5 in the absorbent member 4_B. On the other hand, fig. 4(b) shows a sanitary napkin 1 according to the embodiment, and shows a rear region a of the sanitary napkin 1 having a longitudinally low stiffness portion LB5 in the absorbent member 4_B。

Referring to fig. 4(a), in the sanitary napkin 1a, the rear region a is formed_BSince the compression part 14 is formed, there is a possibility that the center area a can be covered with the compression part_CTo the rear area A_BThe transferred liquid excrement is discharged from the rear area A_BThe end portion of (2) is suppressed from leaking. Here, the rear area A_BRelative to the longitudinal center line C of the compressed part 14_LIs asymmetrical, so the rear area A_BThe characteristic is that the compressed portion 14 can be easily bent along a straight line Q1 connecting the bent points in the shape thereof. For this purpose, the central area A is worn_CAnd a rear area A_BWhen the front sheet 2 is viewed from the side and is folded in a herringbone shape, the rear region A_BIt may be bent along a straight line Q1 connecting bending points of the compression part 14 to each other to form a herringbone fold. That is, the fold line of the chevron fold may be influenced by the asymmetrical shape of the compression portion 14 from the longitudinal center line C_LAnd (4) dislocation. Thus, the chevron folded top may deviate from the seam of the buttocks, may cause discomfort, displeasure, etc. to the wearer and reduce fit, andfurther, leakage of liquid excrement may occur.

However, referring to fig. 4(b), in the sanitary napkin 1 of the present embodiment, the rear region a is formed in the rear region_BThe compression part 14 is formed, so that it can be used for the central area A_CTo the rear area A_BThe transferred liquid excrement is discharged from the rear area A_BThe end portion of (2) is suppressed from leaking. Here, the rear area A_BRelative to the longitudinal center line C of the compressed part 14_LIs asymmetrical. However, the longitudinal low rigidity portion LB5 extends so as to straddle the intersection of the compression parts 14 in the longitudinal direction L, that is, so as to overlap the intersection in a plan view, and the longitudinal low rigidity portion LB5 has relatively low rigidity. For this purpose, the rear area A_BThe low rigidity portion LB5, i.e., the straight line Q2 in the figure, has a characteristic of being easily bent in the width direction W, rather than being bent in the width direction W along a straight line connecting bending points of the shape of the compression portion 14. For this purpose, the central area A is worn_CAnd a rear area A_BWhen the front sheet 2 is viewed from the side and is folded in a herringbone shape, the rear region A_BThe low rigidity portion LB5, i.e., the straight line Q2, is bent in the longitudinal direction of the intersection across the compression part 14 to form a chevron fold. Therefore, the center line C along the length direction can be formed_LIs folded in a herringbone pattern. This makes it possible to position the top of the chevron fold at the parting position of the buttocks, to improve the fit, and to suppress leakage of liquid excrement from the end of the rear region.

In the present embodiment, the longitudinal low rigidity portion LB5 is preferably formed at least on the longitudinal centerline C in the longitudinal direction L_LUpper, longitudinal center line C_LA range overlapping with the compression portion 14 in the width direction W. That is, the longitudinal low rigidity portion LB5 is formed to include the longitudinal center line C of the compression portion 14_LI.e. the range comprised between point Z1 and point Z2. In other words, the longitudinal low rigidity portion LB5 is formed in the range of the maximum width in the longitudinal direction L of the region where the compressed portion 14 exists. Thus, the device is provided withSince the longitudinal direction low rigidity portion LB5 is sufficiently long, the longitudinal direction center line C can be stably formed regardless of the shape of the compression portion 14_LIs folded in a herringbone pattern. This can further improve the fit.

In the present embodiment, the longitudinal direction low rigidity portion LB5 is preferably formed of a low basis weight portion having a relatively low basis weight in the absorbent body 4. For this purpose, the rear area A may be set_BThe low rigidity portion LB5 is easily folded in a chevron shape in the width direction W along the longitudinal direction L. This makes it possible to more stably form the chevron folds at the longitudinal low rigidity portion LB5, and to further improve the fitting property.

In the present embodiment, it is preferable that the rear area a is a rear area_BThe low rigidity portions LB4 and LB4 having relatively low rigidity in the width direction are provided, and the low rigidity portions LB4 and LB4 in the width direction extend parallel to the center line CW in the width direction on both sides of the low rigidity portion LB5 so as to be apart from the low rigidity portion LB5 in the length direction. The effect is as follows. Fig. 5 is a schematic diagram for explaining the operation and effect of the sanitary napkin 1 according to the embodiment. Fig. 5 (a) shows a rear region a of a sanitary napkin 1a having a widthwise low rigidity portion LB4' connected to a lengthwise low rigidity portion LB5 without being separated from a lengthwise low rigidity portion LB5, which is different from the sanitary napkin 1 of the embodiment_B. On the other hand, fig. 5 (b) shows the sanitary napkin 1 according to the embodiment, and shows the rear region a of the sanitary napkin 1 having the widthwise low rigidity portions LB4 and LB4 separated from the lengthwise low rigidity portion LB5_B。

In the sanitary napkin 1a, the longitudinal center line C is defined as the center line_LIs formed in the rear region A_BWhile, the rear area A_BMay be moved away from the curvature of the buttocks by the degree of chevron folding. To cope with this, for example, it is conceivable to refer to fig. 5 (a) and to provide a rear area a_BIn the width direction W, a width is continuously formed from one end edge to the other end edge of the width direction W in parallel with the width direction center line CWThe lower rigidity portion LB4' in the horizontal direction so that the rear area A is formed_BDoes not depart from the curved surface of the buttocks. In this case, the rear region a can be defined by the widthwise low rigidity portion LB4_BAlong the curved surface of the buttocks. However, due to the posture and movement of the wearer, the movement of the portion rearward of the widthwise low rigidity portion LB4 'may become large, and the widthwise low rigidity portion LB4' may become deformed (japanese: へたる). In such a case, for example, a portion on one side (for example, the right side) in the width direction W of the width direction low rigidity portion LB4' may be directed toward the center area A_CSide greatly contracted (arrow Y1 in the figure) and longitudinal center line C_LMay incline to the right side of the width direction W, such as the longitudinal center line C_LSo that the positions are shifted (arrow K1 in the figure). Thus, the rear area A_BMay be folded from the length center line C_LAnd (4) dislocation.

However, referring to fig. 5 (b), in the sanitary napkin 1 of the present embodiment, the rear region a is formed so as to be located at the rear side_BIs not separated from the curved surface of the buttocks, and is located in the rear area A_BIn the longitudinal direction low rigidity portions LB5, widthwise low rigidity portions LB4 and LB4 extending along the widthwise center line CW so as to be separated from the longitudinal direction low rigidity portion LB5 are formed on both sides in the widthwise direction W. The rear region A is defined by the widthwise low rigidity portions LB4, LB4_BCan be easily bent along the curved surface of buttocks, and the rear area A can be formed_BUntil its ends are in contact with the buttocks. Further, since the longitudinal low rigidity portion LB5 is separated from the width low rigidity portions LB4 and LB4, that is, the high rigidity portions HBS and HBS are present therebetween, it is possible to suppress the occurrence of the distortion in the width low rigidity portions LB4 and LB 4. This makes it possible to prevent the chevron folding of the rear side of the widthwise low rigidity portions LB4 and LB4 from occurring from the longitudinal center line C_LAnd (4) deviating. This further improves the fit regardless of the posture and movement of the wearer, and allows the wearer to easily fit the liquid excrement from the rear area A_BThe leakage of the end portion of (2) is further suppressed.

Here, the high rigidity portions HBS, HBS are preferably formed such that the front portion in the longitudinal direction L continuously reaches the drain port abutment region XA, and the rear portion in the longitudinal direction L continuously extends rearward beyond the width direction low rigidity portions LB4, LB 4. More preferably, the high rigidity portions HBS and HBS are connected at the front portion in the longitudinal direction L, and the entire longitudinal direction low rigidity portion LB5 is formed in an inverted U shape so as to surround from three sides. Thus, the widthwise rear region a can be defined by the widthwise low rigidity portions LB4 and LB4_BThe liquid excrement in the excretory opening contact region XA can be easily bent along the curved surface of the buttocks to improve the fit, and the liquid excrement in the high-rigidity portions HBS and HBS (HB2) can be diffused rearward in the longitudinal direction L to form the rearward region A_BIs effective for absorbing liquid excreta.

The compressed portions 14 preferably face both end edges in the width direction W in the absorbent body 4 without interposing other compressed portions therebetween in a plan view. That is, it is preferable that no other compressed part is present between the compressed part 14 and both end edges in the width direction W in the absorbent body 4. Since there is no other compressed part between the compressed part 14 and the both end edges in the width direction W in the absorbent body 4, the rear region a can be maintained by the width direction low rigidity parts LB4, LB4_BThe effect of easy bending along the curved surface of the buttocks can make the rear area A_BEasily comes into close contact with the buttocks.

In the present embodiment, the widthwise low rigidity portions LB4 and LB4 are preferably formed of other low basis weight portions having a relatively low basis weight in the absorbent body 4. For this purpose, the rear area A can be made_BFurther, along the hip, the occurrence of the deformation of the widthwise low rigidity portions LB4 and LB4 can be further suppressed by the high rigidity portions HBS and HBS between the lengthwise low rigidity portion LB5 and the widthwise low rigidity portions LB4 and LB 4. This can further improve the fit.

In the present embodiment, the dimension in the width direction W of the longitudinal direction low rigidity portion LB5 is preferably larger than the dimension in the width direction W of the compression portion 14. Thus, when the low rigidity portion LB5 is folded in a chevron shape in the longitudinal direction, it may be more difficult to be affected by the shape of the compression portion 14. This makes it possible to form the chevron fold more stably at the longitudinal low rigidity portion LB 5. This can further improve the fit.

In the present embodiment, the compression portion 14 preferably has an annular shape in a plan view. Therefore, the liquid excrement can be drawn into the inside and hardly transferred to the outside, and leakage of the liquid excrement from the end portion on the rear side in the longitudinal direction L can be further suppressed. However, at this time, the rigidity of the annular region of the compression portion 14 becomes high, and it can be considered that the rear region a is high_BIt is difficult to be folded in a herringbone manner. However, in the sanitary napkin 1, the rear region A is formed_BSince the longitudinal low rigidity portion LB5 is provided and is less likely to be affected by the rigidity of the region of the compression portion 14, the rear region a can be made to be the region a_BThe folded state of the herringbone is obtained. This can further improve the fit and can further prevent liquid excrement from entering the rear area a_BThe leakage of the end portion of (2) is suppressed.

In the present embodiment, the compression part 14 preferably has at least two convex portions 14Q1, 14Q2 protruding inward or outward of the annular shape in a part of the annular shape. In this case, a bending point may be generated between one convex portion 14Q1 and the other convex portion 14Q 2. The bending point of such a compressed portion is likely to be the base point of the chevron folding, and therefore, the fold line of the chevron folding may be likely to be located from the longitudinal center line C_LAnd (4) deviating. However, in the sanitary napkin 1, the rear region A is formed_BSince the longitudinal low rigidity portion LB5 is provided and is less likely to be affected by the bending point of the compression portion 14, the fold line of the chevron fold can be made to be along the longitudinal center line C_LIn a herringbone folded state. This can improve the fit and can further prevent liquid excrement from entering the rear area A_BThe leakage of the end portion of (2) is suppressed.

In the present embodiment, a concave portion BTA that is concave toward the skin side is preferably provided on the surface of the non-skin surface side corresponding to the intersection portion P1 on the absorbent body 4. Thus, canSo that the absorbent member 4 can be easily deformed convexly upward along the buttocks and the rear region A can be made_BThe state of the herringbone folding is more easily made. This can further improve the fit and can prevent liquid excrement from entering the rear area A_BThe leakage of the end portion of (2) is further suppressed.

Next, a method for manufacturing the sanitary napkin 1 according to the present embodiment will be described. Fig. 6 is a schematic diagram showing a configuration example of the apparatus 300 for manufacturing the sanitary napkin 1. In this example, the materials are formed and transported so that the longitudinal direction L of the sanitary napkin 1 is the transport direction MD. However, the materials may be formed and transported so that the width direction W of the sanitary napkin 1 is the transport direction MD.

First, the rotary drum 111 is rotated, and knitting (japanese: food ) material supplied from the material supplier 113 is deposited in a groove communicating with the negative pressure chamber 111N of the template (japanese: パターンプレート)112, thereby forming a knitting body AB in the groove. Here, the grooves of the template 112 are formed with deep grooves, i.e., grooves for forming the high rigidity portions (high weight portions) HB, and shallow grooves, i.e., grooves for forming the low rigidity portions (low weight portions) LB. The woven material is then deposited in the deep groove to form a high-rigidity portion, and the woven material is deposited in the shallow groove to form a low-rigidity portion. Then, when template 112 reaches positive pressure chamber 111P together with braid AB, braid AB is separated from template 112. On the other hand, the continuous upper-layer tissue sheet UT is supplied from a roller WR1 to the conveyance belt 115. A hot melt adhesive is applied to one surface of the upper tissue sheet UT by an applicator 301. Then, the knitted body AB is pressed against one surface of the upper tissue sheet UT on the conveyor belt 115. Thereby, a first semi-finished product P1 in which the knitted body AB and the upper tissue sheet UT are laminated was formed. The first semi-finished product P1 is sucked by the negative pressure device 116 and conveyed by the conveyor belt 115.

Next, the lower tissue sheet LT in the continuous sheet form is supplied from the roller WR2 to the conveyance belt 115. A hot melt adhesive is applied to one side of the lower tissue sheet LT by an applicator 302. One side of the lower tissue sheet LT is pressed against the first semi-finished product P1 on the conveyor belt 115. Thereby, a second semi-finished product P2 was formed in which the lower tissue sheet LT was laminated with the first semi-finished product P1 (the knitted body AB and the upper tissue sheet UT). Next, the second semi-finished product P2 is pressed by the pressing device 120 and cut into the shape of the absorbent body 4 by the cutting device 130. Thereby, the third semi-finished product P3 is formed. The third semi-finished product P3 is actually the absorbent member 4 (but has the low stiffness portion LB and the high stiffness portion HB but no compressed portion), and the knitted fabric AB is an absorbent core and the upper and lower tissue sheets UT/LT are wrapped core sheets. The third semi-finished product P3 is delivered to the conveying roller 141.

Then, the continuous sheet-like surface sheet TS is supplied from the roller WR3 to the conveyance belt 140. Hot melt adhesive is applied to one surface of the surface sheet TS by an applicator 303. The third semi-finished product P3 supplied from the conveying roller 141 is pressed against one surface of the surface sheet TS. This forms a fourth semi-finished product P4 as a laminate in which the third semi-finished product P3 (absorbent body 4) and the top sheet TS are laminated. The fourth semi-finished product P4 is supplied to the compressing device 150 by the conveying belt 140.

Then, the fourth semi-finished product P4 is compressed by the pair of first and

second rollers

151 and 152 of the compression device 150, and a plurality of compression parts 11 to 14 are formed at the same time. Further, the fourth semi-finished product P4 is compressed by the pair of first and

second rollers

161 and 162 of the compression device 160, forming a plurality of compression portions 15. Thus, a fifth semi-finished product P5 having a plurality of compression parts 11-15 is formed. At this time, the tension of the surface sheet TS, the weight per unit area of the surface sheet TS and the hot melt adhesive, and the like are controlled, so that the concave BTA is formed on the surface of the fifth semi-finished product P5 opposite to the compression parts 11 to 15. The fifth semi-finished product P5 is handed over to the carrying roller 170. The compression units 11 to 14 may be formed by different compression devices.

Then, the continuous sheet-like back sheet BS is supplied from the roller WR4 to the conveyance roller 171. Hot melt adhesive is applied to one surface of the back sheet BS by an applicator 304. The back sheet BS supplied from the conveying roller 171 is pressed against one surface of the fifth semi-finished product P5 by the conveying roller 170. Thereby, a sixth semi-finished product P6 is formed in which the fifth semi-finished product P5 and the back sheet BS are laminated. Next, the sixth semi-finished product P6 is cut at its peripheral portion by the peripheral cutting device 180, and is separated into the shape of the sanitary napkin 1. Thereby forming a seventh semi-finished product P7. The seventh semi-finished product P7 is actually a sanitary napkin 1 (fig. 1).

As described above, the sanitary napkin 1 was manufactured.

Fig. 7 is a diagram showing another configuration example of the sanitary napkin 1 according to the embodiment. The sanitary napkin 1 according to the embodiment of fig. 7 has compressed parts 11 and 14 of different shapes as compared with the sanitary napkin 1 according to the embodiment of fig. 1. That is, the compressed parts 11, 14 of the sanitary napkin 1 of fig. 1 each have a single heart shape, whereas the compressed parts 11, 14 of the sanitary napkin 1 of fig. 7 each have a single cotton (cotton) shape. In this case, the sanitary napkin 1 of fig. 7 can also achieve the same operational effects as the sanitary napkin 1 of fig. 1.

Fig. 8 is a diagram showing another configuration example of the sanitary napkin 1 according to the embodiment. The sanitary napkin 1 according to the embodiment of fig. 8 has compressed parts 11 and 14 of different shapes as compared with the sanitary napkin 1 according to the embodiment of fig. 1. That is, the compressed parts 11 and 14 of the sanitary napkin 1 of fig. 1 each have a single heart shape, whereas the compressed part 11 of the sanitary napkin 1 of fig. 8 has a single cotton (cotton) shape and the compressed part 14 has two cotton (cotton) shapes. In this case, the sanitary napkin 1 of fig. 8 can also achieve the same operational effects as the sanitary napkin 1 of fig. 1.

The absorbent article of the present invention is not limited to the above-described embodiments, and the embodiments may be combined with each other, modified, and the like without departing from the object and the scope of the present invention.

Description of the reference numerals

1. Sanitary napkin (absorbent article)

2. Surface sheet

4. Absorbent body

14. Compression part

AC. Central region

AB. Rear region

P1, P2, intersection

LB5, longitudinal low rigidity portion.

Claims

1. An absorbent article having a longitudinal direction and a width direction, and having a longitudinal direction center line passing through the center in the width direction and extending in the longitudinal direction, and a width direction center line passing through the center in the length direction and extending in the width direction, the absorbent article comprising a front sheet, a back sheet, and an absorbent body positioned between the front sheet and the back sheet,

the absorbent article has a central region facing a crotch portion of a wearer when worn in a plan view, and a rear region adjacent to a rear side in the longitudinal direction of the central region,

the absorbent article includes a compressed portion in the rear region, the compressed portion integrating the top sheet and the absorbent body,

the compressing portion has an asymmetrical shape with respect to the longitudinal center line in a plan view, and includes at least one intersecting portion intersecting the longitudinal center line,

the absorbent article includes a longitudinal low rigidity portion having a relatively low rigidity, and the longitudinal low rigidity portion extends so as to straddle the intersection portion on the central region side of the at least one intersection portion along the longitudinal direction in a plan view.

2. The absorbent article of claim 1,

the longitudinal direction low rigidity portion is formed in a range in which at least the longitudinal direction center line and the compressed portion overlap in the width direction in the longitudinal direction.

3. The absorbent article of claim 1 or 2,

the longitudinal direction low rigidity portion is formed of a low basis weight portion having a relatively low basis weight in the absorbent body.

4. The absorbent article of claim 1 or 2,

the absorbent article further includes a width direction low rigidity portion having relatively low rigidity on both sides in the width direction of the length direction low rigidity portion in the rear region, the width direction low rigidity portion extending in parallel with the width direction center line so as to be separated from the length direction low rigidity portion.

5. The absorbent article of claim 4,

the width direction low rigidity portion is formed of another low basis weight portion having a relatively low basis weight in the absorbent body.

6. The absorbent article of claim 1 or 2,

the longitudinal direction low rigidity portion has a dimension in the width direction larger than a dimension in the width direction of the compression portion.

7. The absorbent article of claim 1 or 2,

the compression portion has an annular shape in plan view.

8. The absorbent article of claim 7,

the compression part has at least two convex parts protruding toward the inside or outside of the annular shape in a part of the annular shape.

9. The absorbent article of claim 1 or 2,

the absorbent body has a recessed portion recessed toward the skin side on the surface of the non-skin surface side corresponding to the intersection portion.