DE112018008043T5 - DISPOSABLE DIAPER - Google Patents

Abstract

A disposable diaper according to the present invention includes: an absorbent member; a layer not facing the skin, which is arranged on a surface side of the absorbent element not facing the skin; and an outer surface sheet disposed on a skin non-facing surface side of the skin non-facing surface sheet, the disposable diaper having a front portion to be placed on a front side of a wearer in a diaper-worn state, a crotch portion to be arranged in the crotch area and a rear portion to be arranged on the rear side. The absorbent member includes a low basis weight portion in any position within a range from the crotch region portion to the rear portion, the low basis weight portion having a basis weight that is relatively less than other parts of the absorbent member. In the disposable diaper, the outer surface sheet and a sheet located on a skin-facing surface side of the outer surface sheet are bonded by an adhesive, and thereby a plurality of bonded portions are formed extending in the longitudinal direction of the diaper. The multiple connected sections are in an area that overlaps the low basis weight section. In this area, a basis weight of the adhesive in side areas each located in both side surfaces in the width direction of the diaper is higher than the basis weight of the adhesive in a central area located in a central area in the width direction.

Description

Technical area

The present invention relates to a disposable diaper.

State of the art

There have been proposed diapers which can prevent excretions having a relatively high water content, such as watery stools or mushy stools, from leaking to the outside. For example, Patent Literature 1 discloses a diaper in which a pocket forming portion is formed with a downwardly openable pocket in a rear waist region. The literature describes that the portion forming the pocket includes: an inner side region of the pocket extending upward from both side fastening parts which are attached to a belt-shaped region; an outer side portion of the pouch positioned on an extension of an absorbent member; and lateral side portions of the bag each formed from both lateral sides of the outer and inner side portions of the bag. The inner side region of the pocket of the section forming the pocket is contracted and shortened in the lateral direction, so that both lateral side regions of the pocket are folded inward in the lateral direction.

Citation list

Patent literature

Patent Literature 1: JP 2016-67958A

Summary of the invention

The present invention relates to a disposable diaper including: an absorbent member; a layer not facing the skin, which is arranged on a surface side of the absorbent element not facing the skin; and an outer surface sheet disposed on a non-skin-facing surface side of the skin-non-skin facing surface sheet, the disposable diaper having a front portion to be disposed on a front side of a wearer in a state in which the disposable diaper is worn, a crotch portion to be arranged in the crotch region of the wearer and a rear portion to be arranged at the rear of the wearer. The absorbent member includes a low basis weight portion in any position within a range from the crotch region portion to the rear portion, the low basis weight portion having a basis weight that is relatively less than other parts of the absorbent member. The outer surface sheet and a sheet located on a skin-facing surface side of the outer surface sheet are bonded by an adhesive, and thereby a plurality of bonded portions are formed extending in a lengthwise direction of the diaper. The multiple connected portions are located in an area overlapping the low basis weight portion in a thickness direction. In the aforesaid range, a basis weight of the adhesive in side areas each located in both side surfaces in a width direction of the diaper is higher than the basis weight of the adhesive in a central area located in a central area in the width direction.

Figure list

• [ 1 ] 1 Fig. 13 is a perspective view schematically showing a disposable diaper of the present invention in a natural state.
• [ 2 ] 2 Fig. 13 is a conceptual plan view showing a skin-facing surface side (inner surface side) of the in 1 schematically represents the diaper shown in an expanded and stretched state.
• [ 3 ] 3 (a) FIG. 13 is a cross-sectional view showing an embodiment of the FIG 2 represents the diaper shown along the line AA, and 3 (b) FIG. 13 is a cross-sectional view showing an embodiment of the FIG 2 illustrated diaper along line BB.
• [ 4th ] 4 (a) FIG. 13 is a top plan view illustrating one embodiment of an absorbent member of FIG 2 represents the diaper shown, and 4 (b) Fig. 2 is a side view along line II of the absorbent element of Fig 4 (a) .
• [ 5 ] 5 Figure 13 is a schematic diagram illustrating one embodiment of joined portions on an outer surface ply.
• [ 6th ] 6th Fig. 13 is a perspective view schematically showing a state after using a disposable diaper according to the present invention.
• [ 7th ] 7th Figure 13 is a schematic diagram illustrating another embodiment of the bonded portions on an outer surface ply.
• [ 8th ] 8th FIG. 13 is a cross-sectional view showing another embodiment of the FIG 2 represents the diaper shown along the line AA.
• [ 9 ] 9 FIG. 13 is a plan view showing another embodiment of an absorbent member of FIG 2 represented diaper.

Description of the embodiments

In the diaper disclosed in Patent Literature 1, the pocket is formed in the rear portion of the diaper. As a result, the absorbent unit protrudes in the direction of the surface side of the diaper facing the skin and thus impairs the wearing comfort. Further, in the diaper disclosed in Patent Literature 1, the presence of the pocket causes the rear portion of the diaper to bulge, thereby deteriorating the appearance of the diaper.

The present invention relates to a disposable diaper and a manufacturing method therefor which is able to overcome the disadvantages of the conventional art.

A disposable diaper of the present invention is described below according to preferred embodiments thereof. The 1 to 3 10 illustrates a pull-up disposable diaper which is an embodiment of a disposable diaper of the present invention. The diaper 1 includes, in a state of being worn, a front portion F to be placed on the front of a wearer, a rear portion R. to be placed on the back of the wearer and a crotch portion M. , which is located between the front and rear sections and is to be placed in the crotch area of the wearer. These elements extend continuously in the front-to-back direction of the wearer. The diaper 1 has a longitudinal direction of the diaper X , which extends from the front of the wearer to the rear over the crotch region section (hereinafter also referred to as “longitudinal direction X”), and orthogonally to this, a diaper width direction Y (hereinafter also referred to as “width direction Y”).

As in the 1 and 2 shown includes the diaper 1 The following: an absorbent unit 2 with an absorbent element 23 that can absorb and hold waste; and an outer shell 3 on the surface side of the absorbent unit that is not facing the skin 2 is arranged. In the diaper 1 Both lateral side edge portions on the front side are respectively connected to both lateral side edge portions on the rear side by a known connecting means such as an adhesive, a heat seal or an ultrasonic seal, thereby forming a pair of side seals S. and S. as well as a waist opening WH through which the wearer's body extends and a pair of leg openings LH through which the legs of the wearer extend. Details on the outer shell 3 are described below.

Although not shown in the figures, the diaper of the present invention may be a so-called open type disposable diaper instead of the aforementioned embodiment. In particular, instead of the pair of side seals S. and S. in each case a pair of fastening straps can be provided on both lateral side edge portions, which extend along the longitudinal direction X in the rear section R. the diaper 1 extend. Each fastener tape can include a fixation portion. A target area to which the fixation sections of the respective fastening tapes can be detachably attached can be on the surface of the front section F of the diaper which is not facing the skin 1 be trained. The target area can be formed by bonding / attaching to a non-skin-facing surface of a skin-non-facing sheet that forms the skin-non-facing surface of the front portion F.

As used herein, "skin-facing surface" refers to the surface of the diaper or a component thereof (e.g., the absorbent unit) that faces the skin side of the wearer when the diaper is worn. “Non-skin facing surface” refers to the surface facing the opposite side of the skin when the diaper is worn. In other words, the skin facing surface is the surface that is relatively closer to the wearer's skin, whereas the non-skin facing surface is the surface that is relatively farther from the wearer's skin. "When worn" refers to a condition in which the diaper is held in its appropriately worn position.

As in 1 shown includes the diaper 1 between the waist opening WH and the leg openings LH a section W. below the waist, which is positioned around the waist / waist portion of the wearer when the diaper is worn. The section W. below the waist is an area that is in the same position in the longitudinal direction X located like the side seals S. the diaper 1 , and in the present embodiment, the front portion F constitutes the front portion W. below the waist and the back section R. forms the rear section W. below the waist.

As in 2 shown has the absorbent unit 2 in an expanded and stretched state of the diaper 1 a substantially rectangular shape and is intended to extend from the front section F to the rear section R. to extend. The longitudinal direction of the absorbent unit 2 corresponds to the longitudinal direction X the diaper 1 . The absorbent unit 2 is in a central portion in the width direction Y of the outer shell 3 arranged. The absorbent unit 2 is attached to the outer shell by a bonding agent such as an adhesive 3 connected. The "expanded and stretched state" of the diaper 1 refers to a condition in which the diaper 1 by cutting open the side seals S. or loosening the fastening between the fixing portions of the fastening tapes and the target area is spread openly, and the spread diaper 1 is stretched and expanded to its intended size (ie, the size when the diaper is spread out in a planar manner in a state in which the effect of stretchable members is completely eliminated).

As in the 2 and 3 shown contains the absorbent unit 2 The following: a liquid-permeable, skin-facing surface layer 21 which forms the surface facing the skin; a surface layer that is not very permeable to fluids (including water-repellent) and not facing the skin 22nd which forms the surface not facing the skin; and a liquid retentive absorbent member 23 that is between the two layers 21 and 22nd is arranged. The absorbent element 23 is designed in such a way that an absorbent core 231 with the absorption capacity of a liquid-permeable core sheath layer 232 is covered. The absorbent element 23 is in direct contact with the surface layer facing the skin 21 and the surface layer not facing the skin 22nd .

The absorbent element 23 the absorbent unit 2 includes a section 2L with a low basis weight in any position within a range in the longitudinal direction X from the crotch area section M. to the rear section R. , where the section 2L The low basis weight has a basis weight that is relatively lower than other portions of the absorbent member 23 is. In the longitudinal direction X can be the section 2L with low basis weight only in the crotch area M. or can only be in the rear section R. or can be both in the crotch area section M. as well as in the rear section R. are located. The section 2L The low basis weight may be present in the entire area or only partially in the Y width direction. This in 4 (a) illustrated absorbent element 23 contains a single section 2L with low basis weight in the entire area in the longitudinal direction X and the width direction Y of the rear portion only R. , and in the crotch area section M. is not a section 2L with low basis weight available. As in 4 (b) is shown in the section 2L with a low basis weight, the surface side of the absorbent element facing the skin 23 in the direction of the surface side not facing the skin, and the thickness of the section 2L The low basis weight decreases toward an end side edge of the trailing section R. gradually decreasing.

The absorbent element 23 includes a section 2H high basis weight, which has a higher basis weight than the section 2L having a low basis weight. In one embodiment with a different shape than that in 4 (b) may be the boundary between the section 2L with low basis weight and the section 2H high basis weight can be formed as one step. The section 2H The high basis weight can be separated into two or more sections in the absorbent element 23 to be provided. In this case, the high basis weight sections 2H formed in two or more sections having the same basis weight or different basis weights. In cases where there are three or more areas of different basis weights in the absorbent element 23 are present, the area with the lowest basis weight is considered to be the section 2L defined as low basis weight, and the other areas are called sections 2H defined with a high basis weight. The section 2L The low basis weight can be in any position within a range of the crotch area portion M. to the rear section R. be present and can be present in other positions if necessary.

Any material conventionally used in absorbent articles can be used for the skin facing surface layer without particular limitation 21 , the surface layer not facing the skin 22nd and the absorbent element 23 be used. For example, it is in the case of the surface layer facing the skin 21 possible to use one of several types of nonwoven fabrics or porous layers. With the surface layer not facing the skin 22nd it is possible to use, for example, a resin layer or a laminate of a resin layer and a non-woven fabric. With the absorbent core 231 of the absorbent element 23 it is possible to use, for example, an aggregate of hydrophilic fibers such as wood pulp or hydrophilized synthetic fibers, or a member in which a water-absorbent polymer is retained in the above-mentioned aggregate. In the core sheath layer 232 it is possible to use a layer that is the same as the surface layer facing the skin 21 is similar.

As in 3 shown is an outer surface layer 25th on the surface side not facing the skin of the surface layer not facing the skin 22nd the absorbent unit 2 arranged. The outer surface layer 25th is at least in the crotch area section M. the absorbent unit 2 arranged and preferably extends over the crotch region portion M. to the front section F and the rear section R. . Sections of the outer surface layer 25th which are located in the front section F and in the rear section R. are located at least between the absorbent unit 2 and the outer shell described later 3 arranged. The outer surface layer 25th may only be used in the crotch area M. to the outer surface of the diaper 1 may or may not be exposed in any of the front section F, the crotch area section M. or the rear section R. exposed by the outer shell 3 also the crotch area section M. covers.

Back to 2 includes the diaper 1 an outer shell 3 . The outer shell 3 is on the surface side of the outer surface layer not facing the skin 25th arranged and is a member that forms the outer surface of the diaper 1 forms. As in 2 shown, forms the peripheral edge of the outer shell 3 at least one outline of each of the front portion F and the rear portion R. the diaper 1 . The outer shell 3 which are located in the front section F and in the rear section R. has a rectangular shape that is longer in the width direction Y than in the length direction X , and forms the section W. below the waist. In other words, it is the outer shell 3 at the in 2 illustrated diaper 1 into a rear outer shell 3R to be placed on the back of the carrier, and a front outer shell 3F , which is to be placed on the front of the wearer, divided, and the absorbent unit 2 is attached so that it is the rear outer shell 3R and the front outer shell 3F bridged. Instead, a diaper according to another embodiment of the present invention can be designed in such a way that the outer shell 3 in addition to the front section F and the rear section R. continuously over the crotch area portion M. is arranged.

As in 3 (b) shown, includes the outer shell 3 a laminate with an outer layer nonwoven fabric 31 the surface of the diaper not facing the skin when worn 1 forms, and an inner layer nonwoven fabric 32 , the one on the surface side of the outer layer nonwoven facing the skin 31 is arranged. In a state in which the diaper 1 is worn, the outer layer forms nonwoven fabric 31 the surface of the diaper not facing the skin 1 , and the inner layer nonwoven fabric 32 forms the surface of the diaper facing the skin 1 . The outer layer nonwoven 31 and the inner layer nonwoven fabric 32 are bonded to each other at predetermined portions by a bonding agent such as an adhesive. In terms of the outer surface location 25th is the inner layer nonwoven 32 on the surface side of the outer surface layer not facing the skin 25th arranged, and the outer layer nonwoven fabric 31 is on the surface side of the inner layer nonwoven that is not facing the skin 32 arranged.

It should be noted that, though 3 (b) is shown in such a way that between the outer layer nonwoven 31 and the inner layer nonwoven fabric 32 as well as between the inner layer nonwoven fabric 32 and the outer surface layer 25th a space is present, this representation is for explanation purposes only, and the nonwovens and the layers are actually not separated, but rather connected or connected to one another in some other way, although this is not shown in the figure.

As in the 1 and 2 are shown in the longitudinal direction X the diaper has a plurality of thread-like or band-like second elastic elements 33 between the outer layer nonwoven 31 and the inner layer nonwoven fabric 32 provided with spaces in between. The second elastic elements 33 extend along the width direction Y of the diaper, and a plurality of the second elastic members 33 are in a stretched state between the outer layer non-woven fabric 31 and the inner layer nonwoven fabric 32 appropriate. The contraction of the second elastic elements 33 forms in the section W. below the waist folds below the waist when the diaper 1 will be carried. The folds below the waist are formed to extend along the width direction Y, which is the direction in which the second elastic members extend 33 expand and contract.

As in the 3 and 5 shown are the outer surface layer 25th and a layer that is on the skin-facing surface side of the outer surface layer 25th is connected by an adhesive, and thereby several connected sections 27 formed in a way that extends in the longitudinal direction X of the diaper, but does not extend continuously in the Y width direction. In a planar view of the diaper 1 are the connected sections 27 in an area that includes the section 2L with a low basis weight of the absorbent unit 2 overlapped in the thickness direction, and are overlapped in the length direction X formed extending. The connected sections 27 include connected sections 27a (hereinafter also referred to as “central connected sections 27a " denoted) formed in a central area extending in a central area in the width direction Y of the diaper 1 located, and connected sections 27b (hereinafter also referred to as “laterally connected sections 27b " denoted) which are formed in side regions each located in both side surfaces in the width direction Y, and the connected portions overlap the portion 2L with low Basis weight in the thickness direction. The central connected sections 27a are made by joining the outer surface layer 25th with the surface layer not facing the skin 22nd formed in the central area in the width direction Y. The laterally connected sections 27b are made by joining the outer surface layer 25th with an intermediate layer described later 29 are formed in each of the side faces in the Y width direction. An area in which the connected sections 27 the section 2L with a low basis weight of the absorbent unit 2 overlap in the thickness direction is made by the central area 27C and the side areas 27S educated. The central area 27C includes the central connected sections 27a and is located in the central portion in the width direction of the diaper. The side areas 27S are located on both lateral sides in the width direction of the diaper with the central area 27C located in between. The basis weight of the adhesive in the central area 27C differs from the one in the side panels 27S , and preferably is the basis weight of the adhesive in the side areas 27S higher than the basis weight of the adhesive in the central area 27C .

In particular, various configurations are conceivable, such as, for example: (1) Establishing the basis weight of the adhesive in the central area 27C that is different from the one in the side panels 27S is by forming each of the connected portions 27a and 27b that are in the fields 27C and 27S by applying the same amount of adhesive while the adhesive is being applied so that the spacing between applications is different in each of the areas; or (2) establishing the basis weight of the adhesive in the central area 27C that is different from the one in the side panels 27S is by applying a larger amount of adhesive to the laterally joined sections 27b that are in the side panels 27S are present than on the central connected sections 27a that are in the central area 27C are present while the adhesive is being applied so that the interval between applications is the same; or (3) establishing the basis weight of the adhesive in the central area 27C that of the one in the side panels 27S is different, by varying both the amount applied and the intervals between the application of the adhesive.

The diaper 1 can also be an intermediate layer 29 contained in each of the two side portion surfaces in the Y width direction. As in 3 shown, is the intermediate layer 29 between the surface layer not facing the skin 22nd and the outer surface layer 25th . The liner 29 consists of a non-woven fabric that is air-permeable and liquid-resistant or water-repellent. The liner 29 is at least in the crotch area section M. the absorbent unit 2 educated.

In the liner 29 there is a fixed end section 29c that extends along the lengthwise direction X extends, between the surface layer not facing the skin 22nd and the outer surface layer 25th , and a free end portion 29a is in the direction of the surface side of the absorbent element facing the skin 23 folded to form a leak-proof cuff. The elastic elements 29b are in a stretched state at one free end 29S of the leak-proof cuff is provided, which is on the side of the free end portion 29a is located. This gives the liner 29 an extensibility along the longitudinal direction X . The contraction of the elastic elements 29b allowed the liners 29 stand up towards the wearer's skin, with each of the two lateral side edges of the absorbent element 23 in the width direction Y or the vicinity thereof serves as a base point. The elastic elements 29b are along the longitudinal direction X arranged and in a stretched state on the intermediate layer 29 appropriate. In the liner 29 is the fixed end section 29c , which is located on a lateral side edge on the free end portion 29a opposite side, connected by being between the surface layer not facing the skin 22nd the absorbent unit 2 and the outer surface layer 25th is arranged.

As in the 3 (a) and 3 (b) shown comprises the fixed end portion 29c a second connected section 27A in which the surface layer not facing the skin 22nd and the liner 29 are connected with an adhesive. The second connected section 27A is made by connecting the surface layer not facing the skin 22nd and the liner 29 formed and is designed so that the laterally connected sections 27b overlap in the Z direction of thickness. An area in which the second connected section 2A is formed is formed so that it has the side area 27S overlaps in the thickness direction Z.

With the diaper 1 According to the present embodiment having the above configuration, immediately after the diaper is put on, neither a pocket nor other such components are formed on the outer surface of the diaper, and this makes the appearance of the diaper clean and clear, with few protrusions and depressions, thereby reducing the outer surface Appearance of the diaper is improved. Furthermore, after excretions such as feces with a relatively large weight, the central surface of the absorbent member is deformed in the Width direction so that it protrudes outwards and a pocket 1P forms, which can absorb enveloping feces. As in 6th therefore, feces with a high water content can also be successfully retained in the central face of the absorbent member in the width direction. In this way, excrement can be prevented. The central surface of the absorbent member in the width direction deforms for the following reasons. First, the absorbent member has a low basis weight portion that is easily deformable. In addition, the basis weight of the adhesive is in the central area 27C , in which the central connected sections 27a are lower than in the lateral areas 27S in which the laterally connected sections 27b are present, and this makes the surface layer not facing the skin 22nd and the outer surface layer 25th easily deformable in the central face in the width direction.

Preferably is the length of the connected sections 27 along the longitudinal direction X longer than the length of the section 2L designed with a low basis weight. With this configuration it is possible to use a bag 1P that is able to form excretions throughout the area of the section 2L with a low basis weight to retain enveloping, thereby enabling more effective prevention of the leakage of exudates.

Preferably the central area is 27C in a range from 40 to 70% with respect to the total length of the absorbent element 23 formed in the width direction Y of both sides of the central portion of the absorbent member 23 overstretched. Further, each of the side areas is preferably in a range of 15 to 30% with respect to the total length of the absorbent element 23 in the width direction Y from one of the two lateral side edges of the absorbent element 23 educated. With this configuration, it is possible to increase the rigidity in the side areas 27S increase in which the laterally connected sections 27b are present, causing the formation of the pocket 1P for picking up feces is further facilitated. The border between the central area 27C and the side area 27S is as an end on the center side in the width direction of the side joined portion 27b defined, the one in the width direction Y within the side area 27S closest to the center panel. The outer end in the width direction of the side area 27S is as the end of the absorbent element 23 defined in the width direction.

The ratio (B / A) of the basis weight (B) of the adhesive in the side area 27S , in which the laterally connected sections 27b are present at the basis weight (A) of the adhesive in the central area 27C , in which the central connected sections 27a are preferably 1.3 or more, more preferably 1.5 or more, even more preferably 3.0 or more, and preferably 100 or less, more preferably 80 or less, even more preferably 50 or less. In particular, the ratio (B / A) of the basis weight (B) of the adhesive is in the side range 27S , in which the laterally connected sections 27b are present at the basis weight (A) of the adhesive in the central area 27C , in which the central connected sections 27a are present, preferably from 1.3 to 100, more preferably from 1.5 to 80, even more preferably from 3.0 to 50. The basis weight of the adhesive in each area is determined in a planar view based on the area of each area. In this configuration, the rigidity of the laterally connected sections 27b can be further increased, thereby enabling the pocket 1P is trained to pick up feces more successfully.

From the same point of view, the basis weight of the adhesive in the central area is 27C , in which the central connected sections 27a are present on condition that the aforesaid ratio is satisfied, preferably 0.1 g / m ² or more, more preferably 0.3 g / m ² or more, even more preferably 0.5 g / m ² or more, and preferably 10 g / m ² or less, more preferably 8 g / m ² or less, still more preferably 1 g / m ² or less. Similarly, on condition that the aforesaid relationship is satisfied, the basis weight of the adhesive is in the side portion 27S , in which the laterally connected sections 27b are present, preferably 0.5 g / m ² or more, more preferably 0.7 g / m ² or more, even more preferably 1 g / m ² or more, and preferably 15 g / m ² or less, more preferably 10 g / m ² or less, more preferably 2 g / m ² or less. The basis weight in each area can be measured by cutting out the area to be measured as a sample and dividing the adhesive application amount (g) by the area (m ² ) of the sample in a planar view.

Preferably, as in 5 shown, the number of laterally connected sections 27b extending in the longitudinal direction X extend greater than the number of central connected sections 27a extending in the longitudinal direction X extend. In this configuration, the rigidity of the laterally connected sections 27b can be further increased as air is flowed through the central surface in the width direction where there are relatively fewer connected portions 27 gives. Thus it is possible to have both an easy formability of the bag 1P as well as an elimination of moisture / confinement when the diaper is worn.

Everyone in 5 connected sections shown 27 is like a strip along its length X and may, for example, have a connection pattern with a certain width, such as a belt shape (stripe), a spiral shape or an omega shape. Any connected section 27 can be either continuous or discontinuous along the entire area in the longitudinal direction X the outer surface layer 25th be trained.

In particular, as in 7th shown, preferably the connected sections 27 in the longitudinal direction X irregularly formed. With respect to the connected sections shown in the figure 27 are both the central connected sections 27a as well as the laterally connected sections 27b irregularly formed. However, only one of these connected portions can be formed irregularly. With this configuration it is possible to form the pocket 1P facilitate by increasing the rigidity of the side-joined sections 27b is increased while at the same time the softness of the diaper 1 itself is improved.

It is also preferred to have multiple second connected sections 27A each in a belt shape or a spiral shape along the lengthwise direction X like the connected sections 27 are trained. With this configuration, it is possible to further increase the rigidity of the side surfaces of the absorbent element, thereby facilitating the deformation of the central surface of the absorbent element and thus more easily forming a pocket for retaining feces. As a result, excretions can be successfully retained by the bag and leakage can be prevented.

From the viewpoint of easy moldability of a bag, it is preferable that the absorbent member 23 is formed as a single layer and the above-mentioned portion 2L having a low basis weight. An example of a design of an absorbent element 23 with a single layer and section 2L For example, a low basis weight configuration may be in which the absorbent element 23 has a side surface, as in FIG 4 (b) and the thickness of the absorbent element 23 gradually decreases.

Preferably the rate of shrinkage is in the longitudinal direction X of the section 2L with low basis weight higher than the rate of shrinkage of other areas of the absorbent element 23 . An example of such a configuration can be to use a stretchable absorbent element, e.g. B. in JP 2009-136498A is disclosed, the rate of shrinkage of the section 2L the low basis weight is made to be different from other sections. With this configuration, it is possible to achieve both an adaptability to the carrier and a deformability with respect to excretions and thereby to prevent excretions from escaping.

As in 3 Shown, it is preferred that in the thickness direction Z, the elastic element 29b the central area in a stretched state 27C , in which the central connected sections 27a are present, is arranged in an overlapping manner. In cases where multiple elastic elements 29b are present, it is sufficient if at least one of the plurality of elastic elements 29b the central area 27C , in which the central connected sections 27a are present, overlapped in the thickness direction Z. In this configuration, the respective intermediate layers 29 designed leak-proof cuffs stand even more favorably, and a lateral leakage of excretions can be prevented.

Back to 1 it is preferred that in the thickness direction Z at least one of the second elastic elements 33 that is in the section W. below the waist of the diaper 1 are provided above the section 2L with a low basis weight of the absorbent element 23 is arranged. In other words, in an expanded and stretched state of the diaper 1 , as in 2 illustrated, it is preferred that the section 2L with a low basis weight in a position which is inside the back P of the diaper and where the second elastic members 33 are provided, is present. In this configuration, the three-dimensional deformation of the absorbent member 23 by the contraction of the second elastic elements 33 further facilitated, whereby a leakage of feces is further prevented.

In particular, it is preferred to divide at least one of the second elastic elements into at least several pieces 33 to cut that exist in a position that the section 2L with a low basis weight is overlapped in the thickness direction so as not to show any stretchability. This method can be carried out, for example, using an elastic member cutting unit, etc. used in an assemblable stretch member manufacturing process which e.g. B. in JP 2002-253605A is disclosed by pressing the second elastic member (s) 33 corresponding to the position at which the portion 2L with a low basis weight of the absorbent element 23 is arranged. With this configuration, it is possible to prevent excessive compression in the thickness direction due to contraction of the second elastic elements 33 to suppress and further facilitate the three-dimensional deformation of the absorbent member, thereby preventing exudates from leaking.

Furthermore, it is preferred that both end portions of the second elastic element 33P cut by processing as above, an elastic member connecting portion connected by an adhesive 35 have, and the elastic member connecting portion 35 in the thickness direction Z the laterally connected section 27b overlaps. In this configuration, the rigidity of the side surfaces of the absorbent member becomes 23 is further increased, and this further facilitates the three-dimensional deformation of the absorbent element, whereby the leakage of feces is effectively prevented.

It is also preferred that the second elastic elements 33 that were not cut, more towards the rear end portion 1E as the second elastic member 33P that has been cut are arranged to, from this point of view, the gap between the rear (back) portion of the carrier and the portion W. below the waist in the back section R. to minimize, and the three-dimensional deformation of the absorbent element 23 to prevent excretions from leaking out both in the longitudinal direction and in the width direction.

The 8th and 9 illustrate another embodiment of an absorbent member of a diaper according to the present invention. The following description focuses only on features different from those of the above embodiment, and the above explanation applies to the other features as appropriate. Furthermore, elements that are identical to those in the previous embodiment are given the same reference numerals.

In the 8th shown diaper 1 contains an absorbent element 23 that has multiple sections 2S with low rigidity, which extends along the longitudinal direction X extend. Everyone in 9 shown section 2S with low stiffness does not contain any material that makes up the absorbent core 231 in the absorbent element 23 forms, and is a through hole penetrating the absorbent core in the thickness direction. Instead, the 2S with low stiffness contain a material that makes up the absorbent core 231 but may be of lesser basis weight or thickness than other areas of the absorbent element 23 exhibit. Each of the sections is in the thickness direction Z 2S and 2S with low rigidity arranged so that they have the central connected portion 27a overlap. The sections shown in the figure 2S with low rigidity are at least in the crotch portion M. of the absorbent element and preferably extend to the front portion F and the rear portion R. over the crotch area section M. out. At the time of excretion, in this embodiment, the absorbent element 23 be deformed three-dimensionally, the sections 2S with low rigidity can be used as axes for bending, and thus a pocket capable of retaining exudates can be formed. As a result, the feces can be more successfully retained in the central surface of the absorbent member, and leakage can be prevented more effectively.

Preferably, the width in the width direction Y is a single portion 2S with low rigidity, larger than the width in the width direction Y of a single connected portion 27 under the laterally connected sections 27b . Further, it is preferable that the width in the width direction Y of a single portion is 2S with low rigidity, smaller than the entire width in the width direction Y of the laterally connected portions 27b . With this configuration it is possible both to improve the three-dimensional deformability of the absorbent element 23 as well as a suppression of the inadvertent leakage of excretions through the sections 2S to achieve with low stiffness.

In particular, although dependent on the width and thickness of the absorbent element 23 , the width W1 (please refer 9 ) in the width direction Y of the section 2S with low rigidity, preferably 0.5 mm or more, more preferably 5 mm or more, and preferably 20 mm or less, more preferably 15 mm or less. It is also preferred that the laterally connected sections 27b so that the width in the width direction Y of each connected portion 27 under the laterally connected sections 27b is preferably 0.5 mm or more per each connected portion, more preferably 0.8 mm or more, and preferably 5 mm or less, more preferably 2 mm or less.

As in 8th As shown, in a cross-sectional view along the width direction Y of the diaper, it is preferable that the outer side edges 27L in the width direction Y of the central area 27C , in which the central connected sections 27a are formed, each of the sections 2S overlap with low rigidity in the thickness direction. In other words, it is preferred that the limit 27L between the central area 27C and every page area 27S the position of the respective section 2S is overlapped with low rigidity in the thickness direction. In this embodiment, the absorbent element 23 be deformed by the positions of the sections 2S with low rigidity and the parts in the absorbent element 23 , in which the basis weight of the adhesive becomes different, can be essentially adjusted. Thus, the efficiency in forming the bag by three-dimensionally deforming the absorbent member can be improved, and the leakage of feces can be effectively prevented.

From the same point of view as in 9 illustrated, it is also preferred that the sections 2S with low rigidity at least in the section 2L with low basis weight are available. In other words, it is preferred that the sections 2S with low rigidity extend to parts in which the section 2L with a low basis weight is present. As shown in the figure, it is also preferred that the section 2H with a high basis weight in the longitudinal direction X the diaper is arranged more to the outside than the portion 2L with low basis weight and more backwards towards the side of the rear section R. is trained. With this configuration, it is possible through the deformation of the section 2L to form a pocket three-dimensionally with a low basis weight so that the feces can be successfully retained and leakage in the front-to-back direction of the wearer can be prevented more effectively.

From the viewpoint of further facilitating the three-dimensional formation of a pocket which can retain exudates in the absorbent member and thereby prevent leakage, it is preferable that, in a cross-sectional view along the width direction Y of the diaper, the ratio ( T2 / T1 ) the length T2 from a central portion CL in the width direction of the absorbent member 23 to an outside portion in the width direction of the portion 2S with low rigidity in terms of length T1 from the central portion CL in the width direction of the absorbent member 23 to an end portion in the width direction of the absorbent member (see 9 ) is preferably 0.4 or more, more preferably 0.5 or more, even more preferably 0.6 or more, and preferably 0.9 or less, more preferably 0.8 or less, even more preferably 0.7 or less. In particular, the ratio is preferably 0.4 to 0.9, more preferably 0.5 to 0.8, even more preferably 0.6 to 0.7.

In particular, the length is T1 from the central portion CL in the width direction of the absorbent member 23 to its end portion in the width direction is preferably 35 mm or more, more preferably 50 mm or more, and preferably 75 mm or more less, more preferably 65 mm or less. Furthermore, the length is T2 from the central portion CL of the absorbent member in the width direction to the outer end portion in the width direction of the section 2S with low rigidity, preferably 20 mm or more, more preferably 30 mm or more, and preferably 50 mm or less, more preferably 40 mm or less.

A disposable diaper having the above configuration may be an open-type or pull-on type disposable diaper. From the standpoint of the convenience of the wearer and helper in putting on the diaper, it is preferred that the diaper be of the "pull on" type, as in FIGS 1 and 6th shown. In the case of a pull-on disposable diaper, the outer shell 3 be divided into a front outer shell and a rear outer shell, or instead the outer shell 3 be arranged so that it extends the front portion F over the crotch region portion M. to the rear section R. overstretched. In any event, the disposable diaper of the present invention will have a good appearance immediately after the diaper is put on, whereas a pocket after excretion such as feces 1P is formed so that the absorbent member protrudes outward, as in FIG 6th shown, and thus the bag 1P Absorb and hold back feces, thereby suppressing the leakage of feces.

The present invention has been described above according to preferred embodiments thereof, but the present invention is not limited to the above embodiments. For example, the in 9 illustrated sections 2S with low stiffness in the in 4 (a) illustrated absorbent element 23 be trained.

1. {1} Eine Wegwerfwindel, die Folgendes umfasst:
   • ein absorbierendes Element;
   • eine der Haut nicht zugewandte Lage, die auf einer der Haut nicht zugewandten Oberflächenseite des absorbierenden Elements angeordnet ist; und
   • eine Außenoberflächenlage, die auf einer der Haut nicht zugewandten Oberflächenseite der der Haut nicht zugewandten Oberflächenlage angeordnet ist, wobei:
   • die Wegwerfwindel einen vorderen Abschnitt, der an einer Vorderseite eines Trägers in einem Zustand, in dem die Wegwerfwindel getragen wird, anzuordnen ist, einen Schrittbereichsabschnitt, der im Schrittbereich des Trägers anzuordnen ist, und einen hinteren Abschnitt, der an der Hinterseite des Trägers anzuordnen ist, enthält;
   • das absorbierende Element einen Abschnitt mit niedrigem Basisgewicht in einer beliebigen Position innerhalb eines Bereichs vom Schrittbereichsabschnitt bis zum hinteren Abschnitt enthält, wobei der Abschnitt mit niedrigem Basisgewicht ein Basisgewicht aufweist, das relativ geringer als andere Teile des absorbierenden Elements ist;
   • die Außenoberflächenlage und eine Lage, die sich auf einer der Haut zugewandten Oberflächenseite der Außenoberflächenlage befindet, sind durch einen Klebstoff verbunden, und dadurch werden mehrere verbundene Abschnitte ausgebildet, die sich in einer Längsrichtung der Windel erstrecken;
   • die mehreren verbundenen Abschnitte befinden sich in einem Bereich, der den Abschnitt mit niedrigem Basisgewicht in einer Dickenrichtung überlappt; und
   • in diesem Bereich ist ein Basisgewicht des Klebstoffs in Seitenbereichen, die sich jeweils in beiden Seitenflächen in einer Breitenrichtung der Windel befinden, höher als das Basisgewicht des Klebstoffs in einem zentralen Bereich, der sich in einer zentralen Fläche in der Breitenrichtung befindet.
2. {2} Die Wegwerfwindel gemäß Abschnitt {1}, wobei eine Länge der verbundenen Abschnitte entlang der Längsrichtung der Windel länger ist als eine Länge des Abschnitts mit niedrigem Basisgewicht.
3. {3} Die Wegwerfwindel gemäß Abschnitt {1} oder {2}, wobei ein Verhältnis des Basisgewichts des Klebstoffs in dem Seitenbereich zu dem Basisgewicht des Klebstoffs im zentralen Bereich zwischen 1,3 und 100 liegt.
4. {4} Die Wegwerfwindel gemäß einem der Abschnitte {1} bis {3}, wobei das Verhältnis des Basisgewichts des Klebstoffs in dem Seitenbereich zu dem Basisgewicht des Klebstoffs im zentralen Bereich vorzugsweise 1,3 oder mehr, bevorzugter 1,5 oder mehr, noch bevorzugter 3,0 oder mehr und vorzugsweise 100 oder weniger, bevorzugter 80 oder weniger, noch bevorzugter 50 oder weniger beträgt.
5. {5} Die Wegwerfwindel gemäß Abschnitt {4}, wobei, unter der Bedingung, dass das vorgenannte Verhältnis erfüllt ist, das Basisgewicht des Klebstoffs in dem zentralen Bereich vorzugsweise 0,1 g/m² oder mehr, bevorzugter 0,3 g/m² oder mehr, noch bevorzugter 0,5 g/m² oder mehr und vorzugsweise 10 g/m² oder weniger, bevorzugter 8 g/m² oder weniger, noch bevorzugter 1 g/m² oder weniger beträgt.
6. {6} Die Wegwerfwindel gemäß Abschnitt {4} oder {5}, wobei, unter der Bedingung, dass das vorgenannte Verhältnis erfüllt ist, das Basisgewicht des Klebstoffs in dem Seitenbereich vorzugsweise 0,5 g/m² oder mehr, bevorzugter 0,7 g/m² oder mehr, noch bevorzugter 1 g/m² oder mehr und vorzugsweise 15 g/m² oder weniger, bevorzugter 10 g/m² oder weniger, noch bevorzugter 2 g/m² oder weniger beträgt.
7. {7} Die Wegwerfwindel gemäß einem der Abschnitte {1} bis {6}, wobei die Anzahl der in dem Seitenbereich ausgebildeten verbundenen Abschnitte größer ist als die Anzahl der in dem zentralen Bereich ausgebildeten verbundenen Abschnitte.
8. {8} Die Wegwerfwindel gemäß einem der Abschnitte {1} bis {7}, wobei der verbundene Abschnitt unregelmäßig in der Längsrichtung der Windel ausgebildet ist.
9. {9} Die Wegwerfwindel gemäß einem der Abschnitte {1} bis {8}, wobei das absorbierende Element einlagig ist.
10. {10} Die Wegwerfwindel gemäß einem der Abschnitte {1} bis {9}, wobei das absorbierende Element einen einzelnen Abschnitt mit niedrigem Basisgewicht im gesamten Bereich in der Längsrichtung und der Breitenrichtung nur des hinteren Abschnitts enthält.
11. {11} Die Wegwerfwindel gemäß einem der Abschnitte {1} bis {10}, wobei die Dicke des Abschnitts mit niedrigem Basisgewicht in Richtung eines Endseitenrands des hinteren Abschnitts allmählich abnimmt.
12. {12} Die Wegwerfwindel gemäß einem der Abschnitte {1} bis {11}, wobei:
    • die Wegwerfwindel eine Zwischenlage umfasst, die sich zwischen der der Haut nicht zugewandten Oberflächenlage und der Außenoberflächenlage befindet;
    • ein zweiter verbundener Abschnitt durch Verbinden der der Haut nicht zugewandten Oberflächenlage und der Zwischenlage mit einem Klebstoff bereitgestellt ist; und
    • ein Bereich, in dem der zweite verbundene Abschnitt ausgebildet ist, den Seitenbereich in der Dickenrichtung überlappend angeordnet ist.
13. {13} Die Wegwerfwindel gemäß Abschnitt {12}, wobei:
    • die Zwischenlage in jeder der beiden Seitenabschnittsflächen in der Breitenrichtung der Windel vorgesehen ist; und
    • in der zentralen Fläche in der Breitenrichtung der Windel die Außenoberflächenlage mit der der Haut nicht zugewandten Oberflächenlage verbunden ist und dadurch die verbundenen Abschnitte in dem zentralen Bereich und jeder der Seitenflächen in der Breitenrichtung der Windel ausgebildet sind, die Außenoberflächenlage mit der Zwischenlage verbunden ist und dadurch die verbundenen Abschnitte in jedem der Seitenbereiche ausgebildet sind.
14. {14} Die Wegwerfwindel gemäß Abschnitt {12} oder {13}, wobei in der Dickenrichtung der zweite verbundene Abschnitt die in dem Seitenbereich ausgebildeten verbundenen Abschnitte überlappend angeordnet ist.
15. {15} Die Wegwerfwindel gemäß einem der Abschnitte {12} bis {14}, wobei mehrere der zweiten verbundenen Abschnitte jeweils in einer Gürtelform oder einer Spiralform entlang der Längsrichtung der Windel ausgebildet sind.
16. {16} Die Wegwerfwindel gemäß einem der Abschnitte {12} bis {15}, wobei:
    • eine Seitenabschnittsfläche der Zwischenlage, die sich entlang der Längsrichtung der Windel erstreckt, sich zwischen der der Haut nicht zugewandten Oberflächenlage und der Außenoberflächenlage befindet, und die andere Seitenabschnittsfläche der Zwischenlage in Richtung der der Haut zugewandten Oberflächenseite des absorbierenden Elements gefaltet ist, um ein auslaufsicheres Bündchen zu bilden; und
    • ein elastisches Element in einem gedehnten Zustand einem freien Ende des auslaufsicheren Bündchens bereitgestellt ist.
17. {17} Die Wegwerfwindel gemäß Abschnitt {16}, wobei das elastische Element in einem gedehnten Zustand den zentralen Bereich in der Dickenrichtung überlappend angeordnet ist.
18. {18} Die Wegwerfwindel gemäß einem der Abschnitte {1} bis {17}, wobei:
    • das absorbierende Element mehrere Abschnitte mit geringer Steifigkeit enthält, die sich entlang der Längsrichtung erstrecken; und
    • in der Dickenrichtung jeder der Abschnitte mit geringer Steifigkeit den in dem zentralen Bereich ausgebildeten Abschnitt überlappt.
19. {19} Die Wegwerfwindel gemäß Abschnitt {18}, wobei eine Breite einer der Abschnitte mit geringer Steifigkeit größer ist als eine Breite einer der in dem Seitenbereich ausgebildeten verbundenen Abschnitte.
20. {20} Die Wegwerfwindel gemäß Abschnitt {18} oder {19}, wobei die Breite einer der Abschnitte mit geringer Steifigkeit kleiner ist als eine Gesamtbreite der in dem Seitenbereich ausgebildeten verbundenen Abschnitte.
21. {21} Die Wegwerfwindel gemäß einem der Abschnitte {18} bis {20}, wobei in einer Querschnittsansicht entlang der Breitenrichtung der Windel ein Verhältnis einer Länge von einem zentralen Abschnitt in der Breitenrichtung des absorbierenden Elements zu einem Außenseitenabschnitt in der Breitenrichtung des Abschnitts mit geringer Steifigkeit in Bezug auf eine Länge vom zentralen Abschnitt in der Breitenrichtung des absorbierenden Elements zu einem Endabschnitt in der Breitenrichtung des absorbierenden Elements 0,4 bis 0,9 beträgt.
22. {22} Die Wegwerfwindel gemäß einem der Abschnitte {18} bis {21}, wobei in einer Querschnittsansicht entlang der Breitenrichtung der Windel das Verhältnis der Länge von dem zentralen Abschnitt in der Breitenrichtung des absorbierenden Elements zu dessen Außenseitenabschnitt in der Breitenrichtung des Abschnitts mit geringer Steifigkeit in Bezug auf die Länge von dem zentralen Abschnitt in der Breitenrichtung des absorbierenden Elements zu dem Endabschnitt in der Breitenrichtung des absorbierenden Elements vorzugsweise 0,4 oder mehr, bevorzugter 0,5 oder mehr, noch bevorzugter 0,6 oder mehr und vorzugsweise 0,9 oder weniger, bevorzugter 0,8 oder weniger, noch bevorzugter 0,7 oder weniger beträgt.
23. {23} Die Wegwerfwindel gemäß einem der Abschnitte {18} bis {22}, wobei die Länge von dem zentralen Abschnitt in der Breitenrichtung des absorbierenden Elements zu dessen Endabschnitt in der Breitenrichtung vorzugsweise 35 mm oder mehr, bevorzugter 50 mm oder mehr und vorzugsweise 75 mm oder weniger, noch bevorzugter 65 mm oder weniger beträgt.
24. {24} Die Wegwerfwindel gemäß einem der Abschnitte {18} bis {23}, wobei die Länge von dem zentralen Abschnitt in der Breitenrichtung des absorbierenden Elements zu dem äußeren Endabschnitt in der Breitenrichtung des Abschnitts 2S mit geringer Steifigkeit vorzugsweise 20 mm oder mehr, bevorzugter 30 mm oder mehr und vorzugsweise 50 mm oder weniger, noch bevorzugter 40 mm oder weniger beträgt.
25. {25} Die Wegwerfwindel gemäß einem der Abschnitte {18} bis {24}, wobei äußere Seitenränder der in dem zentralen Bereich ausgebildeten verbundenen Abschnitte jeweils die Abschnitte mit geringer Steifigkeit in der Dickenrichtung überlappen.
26. {26} Die Wegwerfwindel gemäß einem der Abschnitte {18} bis {25}, wobei die Abschnitte mit geringer Steifigkeit mindestens in dem Abschnitt mit niedrigem Basisgewicht vorhanden sind.
27. {27} Die Wegwerfwindel gemäß einem der Abschnitte {18} bis {26}, wobei kein Material, das einen absorbierenden Kern in dem absorbierenden Element bildet, in den Abschnitten mit geringer Steifigkeit vorhanden ist.
28. {28} Die Wegwerfwindel gemäß einem der Abschnitte {18} bis {27}, wobei die Breite in der Breitenrichtung des Abschnitts mit geringer Steifigkeit vorzugsweise 0,5 mm oder mehr, bevorzugter 5 mm oder mehr und vorzugsweise 20 mm oder weniger, bevorzugter 15 mm oder weniger beträgt.
29. {29} Die Wegwerfwindel gemäß einem der Abschnitte {18} bis {28}, wobei bevorzugt wird, dass sich der Abschnitt mit geringer Steifigkeit nach oben zu einem Teil erstreckt, wo der Abschnitt mit niedrigem Basisgewicht vorhanden ist.
30. {30} Die Wegwerfwindel gemäß einem der Abschnitte {1} bis {29}, wobei:
    • die Wegwerfwindel eine Außenhülle auf einer der Haut nicht zugewandten Oberflächenseite der Außenoberflächenlage umfasst;
    • die Außenhülle einen Innenschichtvliesstoff, der auf der der Haut nicht zugewandten Oberflächenseite der Außenoberflächenlage angeordnet ist, und einen Außenschichtvliesstoff, der auf einer der Haut nicht zugewandten Oberflächenseite des Innenschichtvliesstoffs angeordnet ist, enthält;
    • mehrere zweite elastische Elemente, die sich entlang der Breitenrichtung der Windel erstrecken, zwischen dem Außenschichtvliesstoff und dem Innenschichtvliesstoff vorgesehen sind; und
    • mindestens eines der zweiten elastischen Elemente den Abschnitt mit niedrigem Basisgewicht in der Dickenrichtung überlappend angeordnet ist, und die zweiten elastischen Elemente Falten an der Taille bilden, die sich entlang der Breitenrichtung der Windel erstrecken.
31. {31} Die Wegwerfwindel gemäß Abschnitt {30}, wobei mindestens eines der zweiten elastischen Elemente, die in einer Position vorhanden sind, die den Abschnitt mit niedrigem Basisgewicht in der Dickenrichtung überlappt, geschnitten wird, um keine Dehnbarkeit zu zeigen.
32. {32} Die Wegwerfwindel gemäß Abschnitt {30} oder {31}, wobei:
    • ein verbundener Abschnitt des elastischen Elements durch Verbinden beider Endabschnitte des zweiten elastischen Elements, das geschnitten wurde, mit der Außenhülle durch einen Klebstoff ausgebildet wird; und
    • der verbundene Abschnitt des elastischen Elements in der Dickenrichtung den in dem Seitenbereich ausgebildeten verbundenen Abschnitt überlappt.
33. {33} Die Wegwerfwindel gemäß einem der Abschnitte {30} bis {32}, wobei das zweite elastische Element, das nicht geschnitten wurde, mehr in Richtung des hinteren Endabschnitts angeordnet ist als das zweite elastische Element, das geschnitten wurde.
34. {34} Die Wegwerfwindel gemäß einem der Abschnitte {1} bis {33}, wobei das absorbierende Element einen Abschnitt mit hohem Basisgewicht mit einem höheren Basisgewicht als der Abschnitt mit niedrigem Basisgewicht enthält, wobei der Abschnitt mit hohem Basisgewicht mehr zur Hinterseite hin angeordnet ist als der Abschnitt mit niedrigem Basisgewicht.
35. {35} Die Wegwerfwindel gemäß einem der Abschnitte {1} bis {34}, wobei eine Schrumpfungsrate in der Längsrichtung der Windel des Abschnitts mit niedrigem Basisgewicht höher ist als die Schrumpfungsrate anderer Bereiche des absorbierenden Elements.
36. {36} Die Wegwerfwindel gemäß einem der Abschnitte {1} bis {35}, wobei:
    • der zentrale Bereich in einem Bereich von 40 bis 70 % in Bezug auf eine Gesamtlänge des absorbierenden Elements in der Breitenrichtung ausgebildet ist, der beide Seiten des zentralen Abschnitts des absorbierenden Elements überspannt; und
    • jeder der Seitenbereiche in einem Bereich von 15 bis 30 % in Bezug auf die Gesamtlänge des absorbierenden Elements in der Breitenrichtung von einem der beiden lateralen Seitenränder des absorbierenden Elements ausgebildet ist.
37. {37} Die Wegwerfwindel gemäß einem der Abschnitte {1} bis {36}, wobei:
    • die Wegwerfwindel eine Außenhülle auf der der Haut nicht zugewandten Oberflächenseite der Außenoberflächenlage umfasst;
    • die Außenhülle in eine hintere Außenhülle, die auf der Hinterseite des Trägers anzuordnen ist, und eine vordere Außenhülle, die auf der Vorderseite des Trägers anzuordnen ist, unterteilt ist; und
    • eine absorbierende Einheit, die das absorbierende Element enthält, so angebracht ist, dass sie die hintere Außenhülle und die vordere Außenhülle überbrückt.
38. {38} Die Wegwerfwindel gemäß einem der Abschnitte {1} bis {37}, wobei die Wegwerfwindel eine Anziehwindel ist.

With respect to the foregoing embodiments of the present invention, the following disposable pull-on diapers and methods of making the same are further disclosed.

1. {1} A disposable diaper comprising:
   • an absorbent element;
   • a layer not facing the skin, which is arranged on a surface side of the absorbent element not facing the skin; and
   • an outer surface layer disposed on a non-skin-facing surface side of the non-skin-facing surface layer, wherein:
   • the disposable diaper has a front portion to be disposed on a front side of a wearer in a state in which the disposable diaper is worn, a crotch portion to be disposed in the crotch portion of the wearer, and a rear portion which to be arranged at the rear of the carrier contains;
   • the absorbent member includes a low basis weight portion in any position within a range from the crotch region portion to the rear portion, the low basis weight portion having a basis weight that is relatively less than other portions of the absorbent member;
   • the outer surface sheet and a sheet located on a skin-facing surface side of the outer surface sheet are bonded by an adhesive, and thereby a plurality of bonded portions are formed extending in a longitudinal direction of the diaper;
   • the plurality of connected portions are in an area overlapping the low basis weight portion in a thickness direction; and
   • in this area, a basis weight of the adhesive in side areas each located in both side surfaces in a width direction of the diaper is higher than the basis weight of the adhesive in a central area located in a central area in the width direction.
2. {2} The disposable diaper according to item {1}, wherein a length of the connected portions along the lengthwise direction of the diaper is longer than a length of the low basis weight portion.
3. {3} The disposable diaper according to item {1} or {2}, wherein a ratio of the basis weight of the adhesive in the side area to the basis weight of the adhesive in the central area is between 1.3 and 100.
4. {4} The disposable diaper according to any one of {1} to {3}, wherein the ratio of the basis weight of the adhesive in the side area to the basis weight of the adhesive in the central area is preferably 1.3 or more, more preferably 1.5 or more, still is more preferably 3.0 or more, and preferably 100 or less, more preferably 80 or less, even more preferably 50 or less.
5. {5} The disposable diaper according to item {4}, wherein, on condition that the aforesaid ratio is satisfied, the basis weight of the adhesive in the central area is preferably 0.1 g / m ² or more, more preferably 0.3 g / m ² or more, more preferably 0.5 g / m ² or more, and preferably 10 g / m ² or less, more preferably 8 g / m ² or less, even more preferably 1 g / m ² or less.
6. {6} The disposable diaper according to item {4} or {5}, wherein, on condition that the aforesaid ratio is satisfied, the basis weight of the adhesive in the side area is preferably 0.5 g / m ² or more, more preferably 0.7 g / m ² or more, more preferably 1 g / m ² or more, and preferably 15 g / m ² or less, more preferably 10 g / m ² or less, even more preferably 2 g / m ² or less.
7. {7} The disposable diaper according to any one of {1} to {6}, wherein the number of the connected portions formed in the side region is greater than the number of the connected portions formed in the central region.
8. {8} The disposable diaper according to any one of {1} to {7}, wherein the connected portion is formed irregularly in the longitudinal direction of the diaper.
9. {9} The disposable diaper according to any one of {1} to {8}, wherein the absorbent member is single-ply.
10. {10} The disposable diaper according to any one of {1} to {9}, wherein the absorbent member includes a single low basis weight portion in the entire area in the longitudinal direction and the width direction of only the rear portion.
11. {11} The disposable diaper according to any one of {1} to {10}, wherein the thickness of the low basis weight portion gradually decreases toward an end side edge of the rear portion.
12. {12} The disposable diaper according to any one of Sections {1} to {11}, wherein:
    • the disposable diaper includes a spacer sandwiched between the non-skin facing surface layer and the outer surface layer;
    • a second connected portion by connecting those not facing the skin Surface layer and the intermediate layer is provided with an adhesive; and
    • a region in which the second connected portion is formed is arranged to overlap the side region in the thickness direction.
13. {13} The disposable diaper according to section {12}, where:
    • the intermediate sheet is provided in each of the two side portion surfaces in the width direction of the diaper; and
    • in the central area in the width direction of the diaper, the outer surface sheet is connected to the skin non-facing surface sheet and thereby the connected portions are formed in the central area and each of the side surfaces in the width direction of the diaper, the outer surface sheet is connected to the intermediate sheet and thereby the connected portions are formed in each of the side portions.
14. {14} The disposable diaper according to section {12} or {13}, wherein, in the thickness direction, the second connected portion is arranged to overlap the connected portions formed in the side region.
15. {15} The disposable diaper according to any one of sections {12} to {14}, wherein a plurality of the second connected sections are each formed in a belt shape or a spiral shape along the lengthwise direction of the diaper.
16. {16} The disposable diaper according to any one of Sections {12} to {15}, wherein:
    • one side portion surface of the intermediate sheet, which extends along the longitudinal direction of the diaper, is located between the skin-non-facing surface layer and the outer surface layer, and the other side portion surface of the intermediate sheet is folded toward the skin-facing surface side of the absorbent member to form a leak-proof cuff to build; and
    • an elastic member is provided in a stretched state at a free end of the leak-proof cuff.
17. {17} The disposable diaper according to item {16}, wherein the elastic member in a stretched state is arranged to overlap the central area in the thickness direction.
18. {18} The disposable diaper according to any one of Sections {1} to {17}, wherein:
    • the absorbent member includes a plurality of low rigidity portions extending along the longitudinal direction; and
    • in the thickness direction, each of the low rigidity portions overlaps the portion formed in the central area.
19. {19} The disposable diaper according to section {18}, wherein a width of one of the low rigidity portions is larger than a width of one of the connected portions formed in the side region.
20. {20} The disposable diaper according to item {18} or {19}, wherein the width of one of the low rigidity portions is smaller than a total width of the connected portions formed in the side portion.
21. {21} The disposable diaper according to any one of {18} to {20}, wherein, in a cross-sectional view along the width direction of the diaper, a ratio of a length from a central portion in the width direction of the absorbent member to an outside portion in the width direction of the portion with is less Rigidity in terms of a length from the central portion in the width direction of the absorbent member to an end portion in the width direction of the absorbent member is 0.4 to 0.9.
22. {22} The disposable diaper according to any one of {18} to {21}, wherein, in a cross-sectional view along the width direction of the diaper, the ratio of the length from the central portion in the width direction of the absorbent member to the outside portion thereof in the width direction of the portion with is less Rigidity in terms of the length from the central portion in the width direction of the absorbent member to the end portion in the width direction of the absorbent member is preferably 0.4 or more, more preferably 0.5 or more, even more preferably 0.6 or more, and preferably 0, 9 or less, more preferably 0.8 or less, still more preferably 0.7 or less.
23. {23} The disposable diaper according to any one of sections {18} to {22}, wherein the length from the central portion in the width direction of the absorbent member to its end portion in the width direction is preferably 35 mm or more, more preferably 50 mm or more and is preferably 75 mm or less, more preferably 65 mm or less.
24. {24} The disposable diaper according to any one of sections {18} to {23}, wherein the length from the central section in the width direction of the absorbent member to the outer end section in the width direction of the section 2S with low rigidity is preferably 20 mm or more, more preferably 30 mm or more, and preferably 50 mm or less, even more preferably 40 mm or less.
25. {25} The disposable diaper according to any one of the sections {18} to {24}, wherein outer side edges of the connected portions formed in the central area overlap the low rigidity portions in the thickness direction, respectively.
26. {26} The disposable diaper according to any one of sections {18} to {25}, wherein the low-rigidity portions are provided at least in the low-basis weight portion.
27. {27} The disposable diaper according to any one of sections {18} to {26}, wherein no material constituting an absorbent core in the absorbent member is present in the low-rigidity sections.
28. {28} The disposable diaper according to any one of {18} to {27}, wherein the width in the width direction of the low rigidity portion is preferably 0.5 mm or more, more preferably 5 mm or more, and preferably 20 mm or less, more preferably 15 mm mm or less.
29. {29} The disposable diaper according to any one of the sections {18} to {28}, wherein it is preferred that the low rigidity portion extends upward to a part where the low basis weight portion exists.
30. {30} The disposable diaper according to any one of Sections {1} to {29}, wherein:
    • the disposable diaper comprises an outer cover on a non-skin-facing surface side of the outer surface layer;
    • the outer shell contains an inner layer nonwoven fabric which is arranged on the surface side of the outer surface layer not facing the skin, and an outer layer nonwoven fabric which is arranged on a surface side of the inner layer nonwoven fabric which is not facing the skin;
    • a plurality of second elastic members extending along the width direction of the diaper are provided between the outer layer nonwoven fabric and the inner layer nonwoven fabric; and
    • at least one of the second elastic members is arranged to overlap the low basis weight portion in the thickness direction, and the second elastic members form folds at the waist extending along the width direction of the diaper.
31. {31} The disposable diaper according to section {30}, wherein at least one of the second elastic members provided in a position overlapping the low basis weight portion in the thickness direction is cut so as not to show any stretchability.
32. {32} The disposable diaper according to section {30} or {31}, where:
    • a bonded portion of the elastic member is formed by bonding both end portions of the second elastic member that has been cut to the outer cover by an adhesive; and
    • the connected portion of the elastic member in the thickness direction overlaps the connected portion formed in the side region.
33. {33} The disposable diaper according to any one of {30} to {32}, wherein the second elastic member that has not been cut is disposed more toward the rear end portion than the second elastic member that has been cut.
34. {34} The disposable diaper according to any one of {1} to {33}, wherein the absorbent member includes a high basis weight portion having a higher basis weight than the low basis weight portion, the high basis weight portion being more rearward than the low basis weight section.
35. {35} The disposable diaper according to any one of {1} to {34}, wherein a shrinkage rate in the lengthwise direction of the diaper of the low basis weight portion is higher than the shrinkage rate of other portions of the absorbent member.
36. {36} The disposable diaper according to any one of Sections {1} to {35}, wherein:
    • the central region is formed in a range of 40 to 70% with respect to a total length of the absorbent member in the width direction that spans both sides of the central portion of the absorbent member; and
    • each of the side regions is formed in a range of 15 to 30% with respect to the total length of the absorbent member in the width direction of one of the two lateral side edges of the absorbent member.
37. {37} The disposable diaper according to any one of Sections {1} to {36}, wherein:
    • the disposable diaper comprises an outer cover on the non-skin facing surface side of the outer surface layer;
    • the outer shell is divided into a rear outer shell to be placed on the back of the wearer and a front outer shell to be placed on the front of the wearer; and
    • an absorbent unit containing the absorbent member is mounted to bridge the back outer shell and the front outer shell.
38. {38} The disposable diaper according to any one of {1} to {37}, wherein the disposable diaper is a pull-on diaper.

Industrial applicability

The present invention provides a disposable diaper which can prevent the leakage of exudates without deteriorating the appearance when the diaper is worn.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• JP 2016067958 A [0003]
• JP 2009136498 A [0037]
• JP 2002253605 A [0040]

Claims (26)

Disposable diaper comprising: an absorbent element; a layer not facing the skin, which is arranged on a surface side of the absorbent element not facing the skin; and an outer surface layer disposed on a non-skin-facing surface side of the non-skin-facing surface layer, wherein: the disposable diaper has a front portion to be disposed on a front side of a wearer in a state in which the disposable diaper is worn, a crotch portion to be disposed in the crotch portion of the wearer, and a rear portion to be disposed on the back of the wearer , contains; the absorbent member includes a low basis weight portion in any position within a range from the crotch region portion to the rear portion, the low basis weight portion having a basis weight that is relatively less than other portions of the absorbent member; the outer surface sheet and a sheet located on a skin-facing surface side of the outer surface sheet are bonded by an adhesive, thereby forming a plurality of bonded portions extending in a longitudinal direction of the diaper; the plurality of connected portions are located in an area overlapping the low basis weight portion in a thickness direction; and in this area, a basis weight of the adhesive in side areas each located in both side areas in a width direction of the diaper is higher than the basis weight of the adhesive in a central area located in a central area in the width direction. Disposable diaper after Claim 1 wherein a length of the connected portions along the lengthwise direction of the diaper is longer than a length of the low basis weight portion. Disposable diaper after Claim 1 or 2 wherein a ratio of the basis weight of the adhesive in the side region to the basis weight of the adhesive in the central region is between 1.3 and 100. Disposable diaper according to one of the Claims 1 to 3 wherein the number of the connected portions formed in the side region is greater than the number of the connected portions formed in the central region. Disposable diaper according to one of the Claims 1 to 4th wherein the connected portion is formed irregularly in the longitudinal direction of the diaper. Disposable diaper according to one of the Claims 1 to 5 , wherein the absorbent element is single-ply. Disposable diaper according to one of the Claims 1 to 6th wherein: the disposable diaper comprises an intermediate sheet located between the skin non-facing surface sheet and the outer surface sheet; a second bonded portion is provided by bonding the skin non-facing surface sheet and the intermediate sheet with an adhesive; and a region in which the second connected portion is formed is arranged to overlap the side region in the thickness direction. Disposable diaper after Claim 7 wherein: the intermediate sheet is provided in each of the two side portion surfaces in the width direction of the diaper; and in the central area in the width direction of the diaper, the outer surface sheet is connected to the skin non-facing surface sheet and thereby the connected portions are formed in the central area and each of the side surfaces in the width direction of the diaper, the outer surface sheet is connected to the intermediate sheet, and thereby the connected portions are formed in each of the side regions. Disposable diaper after Claim 7 or 8th wherein the second connected portion is arranged to be overlapped in the thickness direction with the connected portions formed in the side region. Disposable diaper according to one of the Claims 7 to 9 wherein a plurality of the second connected portions are each formed in a belt shape or a spiral shape along the lengthwise direction of the diaper. Disposable diaper according to one of the Claims 7 to 10 wherein: one side portion surface of the intermediate sheet, which extends along the lengthwise direction of the diaper, is located between the skin-non-facing surface layer and the outer surface layer, and the other side portion surface of the intermediate sheet is folded toward the skin-facing surface side of the absorbent member to to form a leak-proof cuff; and an elastic member is provided in a stretched state at a free end of the leak-proof cuff. Disposable diaper after Claim 11 wherein the elastic member is arranged in a stretched state to overlap the central region in the thickness direction. Disposable diaper according to one of the Claims 1 to 12th wherein: the absorbent member includes a plurality of low rigidity portions extending along the longitudinal direction; and in the thickness direction, each of the low rigidity portions overlaps the portion formed in the central area. Disposable diaper after Claim 13 wherein a width of one of the low rigidity portions is larger than a width of one of the connected portions formed in the side region. Disposable diaper after Claim 13 or 14th wherein the width of one of the low rigidity portions is smaller than a total width of the connected portions formed in the side region. Disposable diaper according to one of the Claims 13 to 15th wherein, in a cross-sectional view along the width direction of the diaper, a ratio of a length from a central portion in the width direction of the absorbent member to an outside portion in the width direction of the low rigidity portion with respect to a length from the central portion in the width direction of the absorbent member to an end portion in the width direction of the absorbent member is 0.4 to 0.9. Disposable diaper according to one of the Claims 13 to 16 wherein outer side edges of the connected portions formed in the central area overlap the low rigidity portions in the thickness direction, respectively. Disposable diaper according to one of the Claims 13 to 17th wherein the low stiffness portions are present in at least the low basis weight portion. Disposable diaper according to one of the Claims 1 to 18th wherein: the disposable diaper comprises an outer cover on a non-skin facing surface side of the outer surface sheet; the outer shell contains an inner layer nonwoven fabric which is arranged on the surface side of the outer surface layer not facing the skin, and an outer layer nonwoven fabric which is arranged on a surface side of the inner layer nonwoven fabric not facing the skin; a plurality of second elastic members extending along the width direction of the diaper are provided between the outer layer nonwoven fabric and the inner layer nonwoven fabric; and at least one of the second elastic members is arranged to be overlapped in the thickness direction with the low basis weight portion, and the second elastic members form pleats at the waist extending along the width direction of the diaper. Disposable diaper after Claim 19 wherein at least one of the second elastic members existing in a position overlapping the low basis weight portion in the thickness direction is cut so as not to show any stretchability. Disposable diaper after Claim 20 wherein: a bonded portion of the elastic member is formed by bonding both end portions of the second elastic member that has been cut to the outer cover by an adhesive; and in the thickness direction, the connected portion of the elastic member overlaps the connected portion formed in the side region. Disposable diaper after Claim 20 or 21 wherein the second elastic member that has not been cut is disposed more toward the rear end portion than the second elastic member that has been cut. Disposable diaper according to one of the Claims 1 to 22nd wherein the absorbent member includes a high basis weight portion having a higher basis weight than the low basis weight portion, the high basis weight portion being positioned more toward the rear than the low basis weight portion. Disposable diaper according to one of the Claim 1 to 23 wherein a shrinkage rate in the lengthwise direction of the diaper of the low basis weight portion is higher than the shrinkage rate of other portions of the absorbent member. Disposable diaper according to one of the Claims 1 to 24 wherein: the central region is formed in a range of 40 to 70% with respect to a total length of the absorbent member in the width direction and spans both sides of the central portion of the absorbent member; and each of the side regions is formed in a range of 15 to 30% with respect to the total length of the absorbent member in the width direction from one of the two lateral side edges of the absorbent member. Disposable diaper according to one of the Claims 1 to 25th wherein the disposable diaper is a pull-on diaper.

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