JP2018068868A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article which can prevent leakage of an excreted liquid by fitting to various movements of a body and eliminates discomfort due to stiffness of an absorber.SOLUTION: An absorbent article in the invention is partitioned into a front body section in contact with an abdominal part of a wearer, a back body section in contact with a back part of the wearer, and a crotch part positioned between the front body section and the back body section in a longitudinal direction, and includes an absorber arranged from the front body section to the back body section and a plurality of elastic members which are provided in a longitudinal direction end part region in both or one of the front body section and the back body section and extend in a width direction. In the absorbent article, both or one of longitudinal direction end part regions of the absorber is a narrow width region which is narrower in a width than a back and abdominal maximum width of the absorber. A part of at least the one elastic member is overlapped with at least one of the narrow width regions from a skin-non-contact surface side of the absorber.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an absorbent article.

  Absorbent articles such as sanitary napkins and disposable diapers absorb excretion fluid such as urine with an absorber. For example, disposable diapers cover the wearer's abdomen, back, and crotch, and are therefore affected by various body shapes and body movements. In particular, the absorbent body is affected by body movements. Easy member. For this reason, depending on how the wearer moves, the absorbent body may be bent or broken. In such a case, the fit of the absorbent body is lowered, and leakage of excretory fluid is likely to occur.

  The absorber is a member having high rigidity among the members constituting the absorbent article. For this reason, when an absorbent article such as a sanitary napkin or a disposable diaper is worn, the wearer may feel discomfort due to the rigidity of the absorbent body. Moreover, since an absorber swells by absorbing excretory fluid, the swollen absorber may increase a wearer's discomfort.

  In order to solve such a problem, adjustment of the thickness of an absorber or improvement of arrangement of elastic members constituting an absorbent article has been studied. For example, Patent Document 1 discloses a disposable diaper in which a thin-walled portion is provided at an end in the longitudinal direction of an absorbent body, and at least one of the waistline elastic members crosses the width direction of the thin-walled portion of the absorbent body. Disposed disposable diapers are disclosed. In Patent Document 1, it has been studied to improve the fit of the absorber and eliminate the uncomfortable feeling when worn by devising the thickness of the absorber and the arrangement of constituent members in the vicinity of the absorber.

  Further, in Patent Document 2, the front waist region has a first stretch region that crosses the end of the absorber, a second stretch region that is adjacent to the first stretch region and is positioned below in the longitudinal direction, and further It is a disposable diaper having a third stretchable region located below, and the correlation of the elongation stress of each stretchable region is second stretchable region ≧ first stretchable region> third stretchable region, and the rigidity value of the absorber is Disposable diapers that are 0.03 to 0.15 N · cm are disclosed. In patent document 2, it makes it the subject to improve the fitting property of a disposable diaper and to prevent the leakage of excretory fluid by suppressing the shift | offset | difference of an absorber.

JP, 2006-34341, A JP 2009-240695 A

  As described above, various studies have been made in order to improve the fit of the absorbent body and eliminate the uncomfortable feeling when worn. For example, in the prior art, it has been studied to improve the fit of the absorber end and prevent the leakage of excretory fluid by pressing the absorber end with a stretchable member extending in the width direction. However, when the end of the absorbent body is pressed with an elastic member extending in the width direction, wrinkles may occur in the absorbent body due to the elasticity of the elastic member, and in such a case, it occurs between the absorbent body and the skin. Leakage of excretory fluid may occur from the gap. That is, in the conventional absorbent article in which the end of the absorbent body is pressed with a stretchable member extending in the width direction, the fit of the absorbent body is insufficient, and a sense of incongruity due to the occurrence of wrinkles (feeling of wrinkle), There was a sense of incongruity due to the rigidity of the absorber, and the wearing feeling tended to deteriorate.

  Therefore, in order to solve the problems of the conventional technology, the present inventors have provided an absorbent article that has an absorbent body exhibiting high fit and can prevent leakage of excretory fluid. We proceeded with examination. Furthermore, the present inventors have also studied for the purpose of providing an absorbent article in which the uncomfortable feeling caused by the occurrence of wrinkles in the absorbent body and the uncomfortable feeling caused by the rigidity of the absorbent body are reduced.

As a result of intensive studies to solve the above problems, the present inventors have provided a narrow region in both or one of the longitudinal end regions of the absorber, and a plurality of expansions and contractions extending in the width direction. It has been found that by providing at least one of the members so as to overlap the narrow region, an absorbent article can be obtained in which the fit of the absorber is high and the uncomfortable feeling caused by the deformation and rigidity of the absorber is eliminated. It was.
Specifically, the present invention has the following configuration.

[1] It is divided in the longitudinal direction into a front body that contacts the wearer's abdomen, a back body that contacts the back of the wearer, and a crotch located between the front body and the back body,
An absorber disposed from the front body to the back body;
A plurality of stretchable members extending in the width direction provided in the longitudinal direction end region of both the front body and the back body, or an absorbent article,
Both or either one of the longitudinal end regions of the absorber is a narrow region that is narrower than the maximum width of the dorsal belly of the absorber,
At least one of the elastic members is an absorbent article in which a part thereof is superimposed on at least one of the narrow regions from the skin non-contact surface side of the absorber.
[2] The absorbent article according to [1], wherein the minimum width of the narrow region is 50 to 90% with respect to the maximum back width of the absorbent body.
[3] The absorbent article according to [1] or [2], wherein the length in the longitudinal direction of the narrow region is 1 to 20% with respect to the length in the longitudinal direction of the absorbent body.
[4] The elastic member superimposed on the narrow region is any one of [1] to [3] superimposed on a region of 1 to 10 mm from the longitudinal edge of the absorber toward the inside in the longitudinal direction. Absorbent article as described in 1.
[5] The absorbent article according to any one of [1] to [4], wherein the thickness of both or one of the longitudinal end regions of the absorber is thinner than the thickness of the central region of the absorber. .
[6] Stretch region constituting region arranged in the longitudinal direction end side of the narrow region overlapping region with Fe as the tensile strength (N / cm) in the width direction of the narrow region overlapping region of the front body or the back body The absorbent article according to any one of [1] to [5], wherein Fw> Fe when the tensile strength (N / cm) in the width direction is Fw.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article with the high fit property of an absorber and the discomfort resulting from a deformation | transformation and rigidity of an absorber can be obtained.

FIG. 1 is an external perspective view of a disposable diaper according to an embodiment of the present invention. FIG. 2 is a developed plan view of a disposable diaper according to an embodiment of the present invention. FIG. 3 is a developed plan view of a disposable diaper according to an embodiment of the present invention. 4 is a cross-sectional view taken along line YY shown in FIG. FIG. 5 is a plan view for explaining the shape of the absorber. FIG. 6 is a plan view for explaining another shape of the absorber.

  Hereinafter, the present invention will be described in detail. The description of the constituent elements described below may be made based on representative embodiments and specific examples, but the present invention is not limited to such embodiments.

In the present specification, the “front body” means a portion that covers the abdomen side (front of the body) of the wearer when the wearer wears a diaper. “Inseam” means a portion that covers the inseam of the wearer when the diaper is worn on the wearer. The “rear body” means a portion that covers the back side (back of the body) of the wearer when the wearer wears a diaper.
In the present specification, the “longitudinal direction” basically means a direction (Y direction) connecting the front body and the back body of the disposable diaper. The “width direction” basically means a direction (X direction) orthogonal to the longitudinal direction of the disposable diaper. In the present specification, “A to B” means “A or more and B or less”.

(Absorbent article)
The present invention relates to an absorbent article having a front body in contact with the wearer's abdomen, a back body in contact with the back of the wearer, and a crotch portion positioned between the front body and the back body. The front body, the back body, and the crotch part located between the front body and the back body are divided in the longitudinal direction. The absorbent article of the present invention has an absorbent body arranged from the front body to the back body, and a plurality of stretches extending in the width direction provided in the longitudinal end region of both or either of the front body and the back body. It has a member. Here, both or either one of the longitudinal end regions of the absorber is a narrow region that is narrower than the maximum dorsal belly width of the absorber. A part of at least one of the plurality of elastic members extending in the width direction is superimposed on at least one of the narrow regions from the skin non-contact surface side of the absorber. Here, the longitudinal direction end region is a region existing at the end in the longitudinal direction (Y direction), and such an end region is provided along the width direction (X direction).

  In the absorbent article of the present invention, a narrow region that is narrower than the dorso-abdominal maximum width of the absorber is provided in both or any one of the longitudinal end regions of the absorber, and the narrow region is further provided in the narrow region. By superimposing the elastic members, it is possible to improve the fit of the absorber. In particular, the fit of the end of the absorber can be enhanced. In this invention, since an absorber has a narrow area | region, even when it is a case where an absorber edge part is hold | suppressed with an expansion-contraction member, generation | occurrence | production of a wrinkle and a twist in an absorber is suppressed. When wrinkles or creases occur in the absorbent body, a gap is formed between the skin and the absorbent body, so excretory fluid may leak out from the gap. However, in the present invention, the occurrence of wrinkles and creases is suppressed, and absorption occurs. Since the end of the body comes into contact with the wearer's skin without any gaps, it is possible to more effectively suppress leakage of excretory fluid. In the present invention, the fit of the absorbent body can be evaluated by the fact that a gap is not easily formed between the skin and the absorbent body and that the absorbent body easily follows the movement of the wearer's body.

  Moreover, in the absorbent article of this invention, since the generation | occurrence | production of the wrinkle of an absorber is suppressed, the discomfort resulting from generation | occurrence | production of the wrinkle of an absorber is reduced. That is, discomfort such as a feeling of tingling that is felt by wrinkles on the absorber is removed. And discomfort resulting from the rigidity of absorber itself can also be reduced by providing a narrow area | region in an absorber.

  Further, in the absorbent article of the present invention, a narrow region is provided at the end of the absorbent body, and an elastic member is superimposed on the narrow region, whereby the absorbent body absorbs excretory fluid and swells. However, there is also an effect that the swelling due to swelling of the absorbent body is difficult to visually recognize from the appearance. In the conventional disposable diaper, when the absorbent body absorbs excretory fluid and swells, the absorbent body portion protrudes from the outer body of the diaper, which may deteriorate the appearance. In the absorbent article of the present invention, when the absorbent body swells by superimposing an elastic member on the narrow region, the swelling due to swelling can be suppressed from the skin non-contact surface side, and the appearance is deteriorated. Can be prevented. Further, in the absorbent article of the present invention, since the absorber has a narrow region, the end of the absorber is not easily affected by the swelling due to swelling, and the diaper's outer body is separated from the absorber part. The bumps are difficult to see.

The form of the absorbent article of the present invention is not particularly limited. Examples of the absorbent article include disposable diapers and sanitary napkins. Disposable diapers are roughly classified into pants-type disposable diapers and tape-type disposable diapers. The pants-type disposable diaper is a disposable diaper having a structure in which both sides of a front body and a back body are joined in advance. The pants-type disposable diaper may be a cross-linked type having a configuration in which the absorbent main body cross-links between the front body exterior body and the back body exterior body formed separately. Moreover, the pants-type disposable diaper is an integrated type in which the absorbent body is fixed around the crotch part to an exterior body that is integrally formed by passing from the front part through the crotch part to the back part. Also good. The tape-type disposable diaper is a disposable diaper in which a joining tape is attached to both sides of the front body or the back body, and the front body and the back body are joined using the joining tape when worn.
Below, among these various types of absorbent articles, a pants-type disposable diaper is taken as an example to specifically describe the contents of the present invention.

(Pant-type disposable diaper structure)
FIG. 1 is a perspective view showing an example of an absorbent article 100 (hereinafter also referred to as a disposable diaper) viewed from the front body side. Moreover, FIG.2 and FIG.3 is an expanded view which shows the example of a disposable diaper. FIG. 2 shows a state in which the disposable diaper is viewed from the skin contact surface side, and FIG. 3 shows a state in which the disposable diaper is viewed from the skin non-contact surface side.

  As shown in FIGS. 1 to 3, the disposable diaper is applied to the front body 1 that contacts the abdomen of the wearer, the back body 2 that contacts the back of the wearer, and the inseam of the wearer when worn. It has a crotch 3. In the present embodiment, in the disposable diaper, the front body 1 is configured by the front body exterior body 10, and the back body 2 is configured by the back body exterior body 20. The absorber main body 30 is cross-linked to the crotch 3 between the front body exterior body 10 and the back body exterior body 20. That is, one end of the absorber main body 30 is fixed to the front body exterior body 10, and the other end of the absorber main body 30 is fixed to the back body exterior body 20. For example, a hot melt adhesive or the like is used for fixing each exterior body and the absorber main body 30.

  2 and FIG. 3 are assembled into the state shown in FIG. 1 by joining the widthwise ends of the front body exterior body 10 and the back body exterior body 20 from the deployed state. As shown in FIG. 1, the waist opening 4 is formed by the upper end edge of the front body exterior body 10 and the upper end edge of the rear body exterior body 20. Moreover, the leg opening part 5 located around a wearer's leg part at the time of mounting | wearing is formed by joining the both ends of the front body exterior body 10 and the back body exterior body 20 mutually.

  As shown in the plan view of FIG. 2, a plurality of elastic members 43 extending in the width direction are provided in the longitudinal end region of the disposable diaper. In FIG. 2, the elastic member 43 is indicated by a dotted line. As FIG. 2 shows, the some expansion-contraction member 43 is arrange | positioned at predetermined intervals in the longitudinal direction of a disposable diaper. Here, the elastic member 43 provided in the longitudinal end region of the disposable diaper may be referred to as a waist elastic member. The waist elastic member is distinguished from the Tammy elastic member subjected to the Tammy cut described later. In the front body exterior body 10 or the back body exterior body 20, a series of elastic members are cut without being cut in the middle. It has become.

  The plurality of elastic members 43 are fixed to the inner sheet 41 and / or the outer sheet 42 while being sandwiched between the inner sheet 41 and the outer sheet 42. The inner sheet 41 and the outer sheet 42 sandwich the plurality of elastic members 43 to form an edge along the waist opening 4 of the disposable diaper.

  At least a part of the plurality of elastic members 43 is fixed between the inner sheet 41 or the inner sheet 45 and the outer sheet 42 in a state of extending along the width direction. Note that all of the elastic member 43 may be fixed between the inner sheet 41 or the inner sheet 45 and the outer sheet 42, but only a part of the elastic member 43 is the inner sheet 41 or the inner sheet 45 and the outer sheet. It is the state fixed between 42, and the other part does not need to be in the state fixed to each sheet | seat. By fixing only a part of the elastic member 43, the waist region can be easily moved in accordance with the movement of the body, and the fit at the time of wearing can be improved. Moreover, by fixing only a part of the elastic member 43, the absorbent body is less likely to be twisted or wrinkled, and the appearance when worn is improved.

  The expansion ratio when the plurality of elastic members 43 are fixed can be, for example, 150 to 400%, preferably 200 to 380%, and more preferably 250 to 360%. The “stretch rate” is a value indicating the ratio of the length of the stretchable member in the stretched state when the length (original size) of the stretchable member in the non-stretched state (free state) is 100%. is there. As described above, when the stretchable member 43 in the stretched state is fixed between the inner sheet 41 and the outer sheet 42, when the stretchable member 43 contracts, wrinkles (gather) are formed on the inner sheet 41 and the outer sheet 42. It is formed.

  When the elastic member 43 is sandwiched and fixed between the inner sheet 41 and the outer sheet 42, for example, an adhesive is applied to the elastic member 43 itself, and the elastic member 43 to which the adhesive is applied is connected to the inner sheet 41 and the outer sheet. What is necessary is just to pinch | interpose between the sheets 42. At this time, the adhesive may be applied only to a part of the elastic member 43, and in such a case, it is preferable to apply the adhesive to both ends of the elastic member 43. Further, after applying an adhesive to both or one of the inner sheet 41 and the outer sheet 42, the elastic member 43 can be sandwiched and fixed between these sheets 41.

  In the cross-sectional view shown in FIG. 4, the inner sheet 41 and the outer sheet 42 are provided separately, but the inner sheet 41 and the outer sheet 42 may be connected and formed integrally. That is, one sheet member may be folded at the longitudinal edge of the disposable diaper, and a plurality of elastic members 43 may be sandwiched therebetween and fixed. In this case, the portion located inside the fold line is the inner sheet 41, and the portion located outside the fold line is the outer sheet 42. Thus, in this invention, it is also possible to comprise the inner sheet | seat 41 and the outer sheet | seat 42 with one sheet | seat member.

  As the elastic member 43, it is preferable to apply a thread-like elastic rubber material or a belt-like elastic rubber material. As such a rubber material, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, or polyester can be used.

  4 is a cross-sectional view taken along line YY of the developed plan view shown in FIG. In this embodiment, as FIG. 4 shows, the inner side sheet | seat 41 is extended in the direction of the crotch part 3 of a diaper. And a part of inner sheet | seat 41 has overlapped on the edge part of the longitudinal direction of the absorption part main body 30 (skin contact surface). In this way, by fixing a part of the inner sheet 41 on the absorbent body 30, it is possible to improve the fixing stability of the absorbent body 30, the front body exterior body 10, and the back body exterior body 20.

Each of the front body exterior body 10 and the back body exterior body 20 may have an inner sheet 45 as a constituent member. As shown in FIG. 4, in the present embodiment, the outer sheet 42 extends in the direction of the crotch 3, and a part of the outer sheet 42 is located on the skin non-contact surface side of the absorbent body 30. . Here, the inner sheet 45 is disposed on the skin contact surface side of the extended portion of the outer sheet 42. And between the extension part of the outer sheet | seat 42, and the inner sheet | seat 45, it exists in the state in which the one or several elastic member 43 was pinched | interposed.
In addition, the front body exterior body 10 and the back body exterior body 20 do not need to have the inner sheet 45 as a constituent member. In this case, you may extend the inner side sheet | seat 41 to the skin non-contact surface side of the absorption part main body 30. FIG.

  The absorbent main body 30 is held in a state of being bridged between the front body exterior body 10 and the back body exterior body 20, and is located in the crotch portion of the wearer when the disposable diaper is worn, such as urine excreted by the wearer. Absorbs and retains liquids. As shown in FIG. 4, the absorber main body 30 includes an absorber 31, a top sheet 32, a back sheet 33, a cover sheet 34, and a pair of three-dimensional gathers 35.

  The absorber 31 is a member for absorbing a liquid such as urine and holding the absorbed liquid. The absorber 31 is disposed between the liquid-permeable top sheet 32 and the liquid-impermeable back sheet 33. The absorber 31 has a function of absorbing the liquid that has passed through the top sheet 32 and is made of an absorbent material. A well-known material can be employ | adopted for the absorptive material which comprises the absorber 31. FIG. As an absorptive material, it is good also as using a flap pulp, a superabsorbent polymer, or a hydrophilic sheet, for example. The absorber 31 is preferably encapsulated by the core wrap sheet 36. As the core wrap sheet 36, tissue paper, absorbent paper, a nonwoven fabric subjected to hydrophilic treatment, or the like can be used as appropriate.

  The core wrap sheet 36 encapsulates the absorber 31, and the shape of the core wrap sheet 36 may be the same as that of the absorber 31 or may be different from the shape of the absorber 31. For example, the core wrap sheet 36 may have a region corresponding to the narrow region of the absorbent body 31.

  The top sheet 32 is a member that is in direct contact with the skin of the wearer's crotch and allows liquid such as urine to pass through the absorbent body 31. For this reason, the top sheet 32 is made of a liquid-permeable material having high flexibility. Moreover, the top sheet 32 is arrange | positioned so that the skin contact surface side of the absorber 31 may be coat | covered. Examples of the liquid permeable material constituting the top sheet 32 are a woven fabric, a nonwoven fabric, or a porous film. Moreover, as the top sheet 32, it is good also as what used the fiber of the thermoplastic resin like a polypropylene, polyethylene, polyester, nylon, for example, and also making it the nonwoven fabric further.

  The back sheet 33 is a member for preventing the liquid that has passed through the top sheet 32 and absorbed by the absorber 31 from leaking to the outside of the diaper. For this reason, the back sheet 33 is made of a liquid-impermeable material. The back sheet 33 covers the absorbent body 31 from the skin non-contact surface side in order to prevent liquid leakage from the bottom surface of the absorbent body 31. An example of the impermeable material constituting the back sheet 33 is a liquid impermeable film made of polyethylene resin. However, in order to ensure air permeability, it is preferable to use a microporous polyethylene film in which a plurality of fine pores of 0.1 to 4 μm are formed.

  The cover sheet 34 is a member for reinforcing the back sheet 33 and improving its feel. The cover sheet 34 is bonded to the skin non-contact surface side of the back sheet 33. As the material constituting the cover sheet 34, a woven fabric or a non-woven fabric is used. In particular, it is preferable to use a nonwoven fabric or a wet nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester as a material constituting the cover sheet 34.

  As shown in FIG. 2, the absorber main body 30 may include a pair of three-dimensional gathers 35. The pair of three-dimensional gathers 35 are members that stand along both side edges of the absorber 31 and prevent side leakage of urine excreted by the wearer. Each of the three-dimensional gathers 35 is provided with a three-dimensional gather stretchable material at the tip thereof, and rises toward the wearer's skin contact direction when the stretchable material contracts. Therefore, the pair of three-dimensional gathers 35 serves as a urine leakage barrier, and urine that has not permeated through the top sheet 32 or urine that has not been absorbed by the absorber 31 leaks from the leg opening of the disposable diaper. Prevent side leakage. The three-dimensional gather 35 can employ a known configuration used in conventional disposable diapers. The three-dimensional gather 35 can be formed, for example, by sandwiching and fixing a stretched three-dimensional gather elastic material between the layers of the water-repellent sheet. As the water-repellent sheet, for example, a non-woven sheet obtained by a production method such as card embossing or spunbond can be used, and it is particularly preferable to use a non-woven sheet such as SMS or SMMS having high waterproofness.

  As shown in FIG. 2, each of the front body exterior body 10 and the back body exterior body 20 may be provided with a tammy stretchable member 46. The tammy expansion / contraction member 46 is a member disposed on the crotch 3 side with respect to the end region in the longitudinal direction of the front body exterior body 10 and the back body exterior body 20. That is, the tammy expansion / contraction member 46 is an expansion / contraction member provided in the tammy region that is closer to the crotch 3 than the waist region. Usually, in the front body exterior body 10 and the back body exterior body 20, the region from the longitudinal edge of the absorber to the respective longitudinal edges of the front body exterior body 10 and the back body exterior body 20 is referred to as a waist region. A region closer to the crotch 3 than that region is referred to as a tammy region. As described above, when the waist region and the tammy region are distinguished, in the present invention, at least one of the elastic members 43 (waist elastic members) is provided in the tammy region.

  In this specification, the Tammy elastic member 46 refers to an elastic member that is cut (cut) at the center in the width direction. The above-described elastic member 43 is an elastic member mainly provided in the waist region, and such elastic members 43 are arranged in the width direction in the front body exterior body 10 and the back body exterior body 20. The Tammy stretchable member 46 is distinguished from the stretchable member 43 in the presence or absence of the cut.

  Cutting the elastic member like the Tammy elastic member 46 is a method called Tammy cut. When the tammy expansion / contraction member 46 is disposed, similarly to the expansion / contraction member 43, it is fixed between the extending portion of the outer sheet 42 and the inner sheet 45 in an extended state along the width direction of the diaper. And after fixing, it cuts in the midpoint of the width direction of the Tammy expansion-contraction member 46. FIG. By giving such a tammy cut, it can be set as the structure which does not tighten an abdomen too much. In addition, since the tammy expansion / contraction member 46 partially contracts due to the tammy cut, the tammy expansion / contraction member 46 is not stretched in the center region in the width direction of the front body exterior body 10 and the back body exterior body 20.

(Absorber shape)
In the present invention, the absorber 31 has a narrow region. The narrow region is a region provided in an end region in the longitudinal direction of the absorber, and refers to a region that is narrower than the maximum dorsal belly width of the absorber. Here, the dorso-abdominal maximum width of the absorbent body is the maximum width of the absorbent body 31 in a region where the absorbent body 31 overlaps the front body exterior body 10 or the back body exterior body 20. In this specification, when the absorber 31 is divided into a longitudinal end region and a main body region other than the end region, the maximum width of the dorsal belly of the absorbent body 31 is the longitudinal direction of the main body region formed by the longitudinal end region. It can be said that it is the width of the end on the end region side.

  The narrow region refers to a region that is narrower than the width of the end portion on the longitudinal direction end region side of the main body region of the absorber 31, and refers to a region where the minimum width of the narrow region is narrowed to 90% or less. The aspect having the narrow region of the present invention is distinguished from the aspect in which the corners of the absorber are slightly rounded, for example.

  FIG. 5 is a plan view for explaining the shape of the absorber 31. As shown in FIG. 5, the absorber 31 has a narrow region 31a. In addition, the absorber 31 may have a rectangular outer shape, or may have a shape (so-called hourglass shape) in which the central portion in the longitudinal direction is constricted as shown in FIG. In addition, when the absorber 31 is an hourglass shape, the width | variety of a center area | region is narrow, but such an area | region differs from the narrow area | region provided in a longitudinal direction edge part area | region.

  The minimum width of the narrow region 31a is preferably 50 to 90% and more preferably 60 to 85% with respect to the maximum dorsal belly width of the absorber. Here, the minimum width of the narrow region 31a is represented as P in FIG. 5, and the dorsoventral maximum width of the absorber is represented as Q. In the present invention, the value of P / Q is preferably 0.5 to 0.9, more preferably 0.6 to 0.85, and further preferably 0.7 to 0.85. preferable. By providing the absorbent body 31 with the narrow region 31a that satisfies the above conditions, the fit of the end region of the absorbent body 31 is enhanced, thereby preventing the excretory fluid from leaking. Moreover, by providing a narrow area | region in the absorber 31, expression of the rigidity of an absorber can be relieve | moderated and the discomfort felt when wearing the absorbent article 100 (disposable diaper) can be eliminated.

  The longitudinal length of the narrow region 31a is preferably 1 to 20%, more preferably 2 to 15%, and more preferably 3 to 10% with respect to the longitudinal length of the absorber. Further preferred. Here, the length in the longitudinal direction of the narrow region 31a is represented as S in FIG. 5, and the length in the longitudinal direction of the absorber is represented as R. In the present invention, the value of S / R is preferably 0.01 to 0.2, more preferably 0.02 to 0.15, and further preferably 0.03 to 0.1. preferable. By providing the narrow region 31a so as to satisfy the above conditions, the fit of the end region of the absorber 31 is enhanced, and the leakage of excretory fluid can be prevented. Furthermore, the uncomfortable feeling at the time of wear resulting from a deformation | transformation and rigidity of an absorber can be eliminated.

  The length (R) in the longitudinal direction of the absorbent body 31 is the length from the longitudinal edge of the front body exterior body 10 of the absorbent article to the longitudinal edge of the rear body exterior body 20 (full length in the longitudinal direction of the absorbent article). In contrast, it is preferably 70 to 90% or less. Conventionally, in order to reduce the sense of incongruity due to the rigidity of the absorber, it has been studied to reduce the size of the absorber itself, but when the size of the absorber is reduced, the tendency of the rigidity to decrease is not Although there was a leak of excretory fluid. The present invention is characterized in that the absorbent body 31 is provided with a narrow region without reducing the longitudinal length (R) of the absorbent body 31, and such an aspect suppresses leakage of excretory fluid. However, the uncomfortable feeling at the time of wearing resulting from a deformation | transformation and rigidity of an absorber can be reduced.

  The narrow region 31 a is preferably provided in both the narrow region 31 a on the upper end side in the longitudinal direction of the absorber 31 and the narrow region 31 a on the lower end side. It may be provided in any one selected from the narrow region 31a and the narrow region 31a on the lower end side. In the case where the narrow region 31a is provided only in one of the narrow regions 31a, the narrow region 31a is preferably provided in the longitudinal end region disposed on the back body side.

  When the narrow region 31a is provided in both the narrow region 31a on the upper end side in the longitudinal direction of the absorber 31 and the narrow region 31a on the lower end side, the narrow region 31a on the upper end side and the narrow region 31a on the lower end side The shape and size of the narrow region 31a are preferably the same, but may be different. For example, the size of the narrow region 31a in the longitudinal end region disposed on the back body side is made larger or smaller than the narrow region 31a in the longitudinal end region disposed on the front body side. You can also Moreover, the shape of each narrow area | region 31a can also be made into a different shape. For example, in diapers for infants, it is also preferable to appropriately change the shape and size of the narrow region for boys and girls.

  FIG. 6 is a plan view for explaining another shape of the absorber 31. As the shape of the absorber 31, in addition to FIG. 6A, for example, the shape as shown in FIGS. In FIG. 6A, the outline of the narrow area 31a is a curve, but in FIGS. 6B and 6C, the outline of the narrow area 31a is a straight line. The width of the narrow region 31a may be gradually narrowed toward the edge as shown in FIG. 6B, and the width of the narrow region is a constant width as shown in FIG. 6C. May be. In addition, as shown in FIG. 6D, the width of the narrow region 31a may be once again narrowed toward the edge and then widened again. In the shape as shown in FIG. 6D, the edge of the narrow region does not become the minimum width of the narrow region 31a, but the width of the narrowest intermediate portion in the narrow region becomes the minimum width.

  The thickness of the absorber 31 may be substantially uniform in both the longitudinal direction and the width direction, but the thickness of both or one of the longitudinal end regions is larger than the thickness of the central region of the absorber. It may be thinner. That is, the narrow region 31a may be a thin region. For example, when the average thickness of the narrow region 31a is ∨ and the average thickness of the central region in the longitudinal direction of the absorber 31 is W, ∨ / W may be 0.3 to 0.9. It may be 5 to 0.8. By adjusting the thickness of the absorbent body 31 as described above, the uncomfortable feeling caused by the absorbent body when worn is easily eliminated. On the other hand, when the thickness of the absorber 31 is substantially uniform in both the longitudinal direction and the width direction, it becomes easy to prevent a gap from being formed between the skin and the absorber, and the fit of the absorber end portion It becomes easy to prevent leakage of excretory fluid.

  In the present invention, at least one of the elastic members 43 partially overlaps at least one of the narrow regions 31 a of the absorber 31. FIG. 3 shows a state where the absorbent article 100 is viewed from the skin non-contact surface side. In FIG. 3, the shape of the absorber 31 that cannot be visually recognized is drawn with a dotted line for convenience. As shown in FIG. 3, one of the elastic members 43 is superposed on the narrow region 31 a of the absorber 31. In FIG. 3, a state in which a part of one elastic member 43 is superimposed on the narrow region 31a is illustrated, but two or more elastic members 43 may be superimposed.

  When the narrow region 31a is provided at both ends of the absorber 31, the stretchable member 43 only needs to be superimposed on either or both of the narrow regions 31a. When the elastic member 43 is superimposed only on one of the narrow regions 31a, the elastic member 43 is preferably superimposed on the narrow region 31a present on the front body 1 side. By stretching the stretchable member 43 on the narrow region 31a of the front body 1, it is possible to fit the end of the absorber with respect to the contraction of the abdomen, especially the difference between after eating and fasting, the difference between sitting and standing. It becomes possible to prevent discomfort and leakage at the time of wearing.

  In the present invention, by superposing at least one of the elastic members 43 on the narrow region 31a, even if the absorber 31 absorbs excretory fluid and swells, the absorber portion is removed from the outer body of the diaper. Protruding can be prevented. Thereby, even after the excretion, the wearing appearance can be maintained in a good state. In addition, by superposing at least one of the elastic members 43 on the narrow region 31a, the absorber 31 can easily follow the movement of the exterior body. Thereby, the fitting property of the absorber 31 can be improved and the leakage of excretory fluid can be prevented more effectively.

  The stretchable member 43 superimposed on the narrow region 31a is preferably superimposed on a region of 1 to 10 mm from the longitudinal edge of the absorber 31 toward the inside in the longitudinal direction, and a region of 2 to 8 mm. It is more preferable to superimpose. For example, in FIG. 3, one elastic member 43 is superimposed on the narrow region 31 a, but this one elastic member 43 is arranged at a position of 1 to 10 mm from the longitudinal edge of the absorber 31. It is preferable that

Moreover, it is preferable that the elastic member 43 overlaps in the vicinity of the center line of the length in the longitudinal direction of the narrow region 31a. Specifically, it is preferable to overlap with a range of ± 20% of the length in the longitudinal direction from the center line, and more preferable to overlap with a range of ± 10%.
As described above, by disposing the stretchable member 43 superimposed on the narrow region 31a in a predetermined region, even if the absorbent body 31 absorbs excretory fluid and swells, it can be removed from the outer body of the diaper. It can prevent more effectively that an absorber part raises. In addition, by disposing the stretchable member 43 superimposed on the narrow region 31a in a predetermined region, it is easy to follow the movement of the exterior body in regions other than the narrow region of the absorber 31. The overall fit can be further improved.

  In the present invention, as described above, at least one of the elastic members 43 is superimposed on the narrow region 31a, so that the elastic member 43 can also hold the absorber 31 with less force. . For example, when the elastic member 43 is superimposed on the region having the maximum dorsal belly width of the absorbent body 31, a greater force is required to press the absorbent body 31. On the other hand, in the present invention, the force for pressing the absorber 31 can be reduced by superimposing at least one of the elastic members 43 on the narrow region 31a. That is, even if the tension of the elastic member 43 superimposed on the narrow region 31a and the strength of the member itself are reduced, the above-described effects can be sufficiently exerted.

In the present invention, the tensile strength (N / cm) in the width direction of the narrow region overlapping region of the front body 1 or the back body 2 is Fe, and is arranged on the end side in the longitudinal direction from the narrow region overlapping region. When the tensile strength (N / cm) in the width direction of the stretchable region constituting region is Fw, it is preferable that Fw> Fe. By making the tensile strength of each region satisfy the above conditions, the thickness difference of the absorber can be relaxed and a natural fit can be obtained.
Here, the tensile strength (N / cm) in the width direction of the narrow region overlapping region expressed as Fe is a constituent member (extensible member) that overlaps the narrow region of the absorber 31 in the front body 1 or the back body 2. And the sheet), and the tensile strength in the width direction of the constituent members (the elastic member and the sheet) located on the skin non-contact surface side with respect to the absorbent main body 30. Specifically, it is the tensile strength in the width direction of the constituent members (expandable members and sheets) superimposed on the region indicated by region E in FIG. When measuring the tensile strength, first, the side seal part of the disposable diaper is peeled off and deployed as shown in FIG. 2, and then the elastic member provided on the exterior body is extended, and the length at the maximum extension is measured. . Next, the narrow region overlapping region (E) and the stretchable region (W) are cut out. When cutting, it cut | disconnects by the centerline (vertical center part between adjacent elastic members) between adjacent elastic members, and measures the vertical direction area width (cm) of each area | region. This sample was stretched at a rate of 200 mm / min with a tensile tester, the load (N) at a length of 65% of the length at the maximum stretching was measured, and the unit width per unit width divided by the region width (cm). Calculate the intensity.
In addition, the tensile strength (N / cm) in the width direction of the stretchable region constituting region represented as Fw is all the structures that are superimposed on the stretchable region arranged on the end side in the longitudinal direction from the narrow region of the absorber. It is the tensile strength of the width direction of a member (expandable member and sheet). Specifically, it is the tensile strength in the width direction of the constituent members (expandable members and sheets) superimposed on the region indicated by the W region in FIG. The measuring method of the tensile strength in the width direction of the stretchable region constituting region is the same as described above.

DESCRIPTION OF SYMBOLS 1 Front body 2 Back body 3 Crotch part 4 Waist opening part 5 Leg opening part 10 Front body exterior body 20 Rear body exterior body 30 Absorbing part main body 31 Absorber 31a Narrow area | region 32 Top sheet 33 Back sheet 34 Cover sheet 35 Three-dimensional gather 36 Core wrap sheet 41 Inner sheet 42 Outer sheet 43 Elastic member 45 Inner sheet 46 Tammy elastic member 100 Absorbent article

Claims (6)

A front body that contacts the wearer's abdomen, a back body that contacts the back of the wearer, and a crotch located between the front body and the back body, and is divided in the longitudinal direction;
An absorber disposed from the front body to the back body;
A plurality of stretchable members extending in the width direction provided in the longitudinal direction end region of both the front body and the back body, or an absorbent article,
Both or any one of the longitudinal end regions of the absorber is a narrow region having a narrower width than the dorsoventral maximum width of the absorber,
At least one of the elastic members is an absorbent article in which a part thereof is superimposed on at least one of the narrow regions from the skin non-contact surface side of the absorber.   The absorbent article according to claim 1, wherein a minimum width of the narrow region is 50 to 90% with respect to a maximum dorsal belly width of the absorbent body.   The absorptive article according to claim 1 or 2 whose longitudinal direction length of said narrow field is 1 to 20% to the longitudinal direction length of said absorber.   The stretchable member superimposed on the narrow region is superimposed on a region of 1 to 10 mm from the longitudinal edge of the absorber toward the inside in the longitudinal direction. The absorbent article as described.   The absorbent article according to any one of claims 1 to 4, wherein a thickness of both or one of the longitudinal end regions of the absorbent body is thinner than a thickness of a central region of the absorbent body.   The tensile strength (N / cm) in the width direction of the narrow region overlapping region of the front body or the back body is Fe, and the stretchable region constituting region disposed on the end side in the longitudinal direction from the narrow region overlapping region The absorbent article according to any one of claims 1 to 5, wherein Fw> Fe, where Fw is a tensile strength (N / cm) in the width direction.

Images