JP6891453B2 - Absorbent article - Google Patents

Description

The present invention relates to absorbent articles.

Absorbent articles such as sanitary napkins and disposable diapers absorb excrement such as urine by the 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, absorbers are affected by body movements. It is an easy member. Therefore, depending on how the wearer moves, the absorber may be twisted or broken. In such a case, the fit of the absorber is lowered, and the excrement liquid is likely to leak.

The absorber is a member having high rigidity among the members constituting the absorbent article. Therefore, when wearing an absorbent article such as a sanitary napkin or a disposable diaper, the wearer may feel a sense of discomfort due to the rigidity of the absorbent body. In addition, since the absorber swells by absorbing the excrement liquid, the swelled absorber may increase the discomfort of the wearer.

In order to solve such a problem, it is considered to adjust the thickness of the absorber and to improve the arrangement of the elastic members constituting the absorbent article. For example, Patent Document 1 describes a disposable diaper in which a thin-walled portion is provided at an end portion in the longitudinal direction of the absorber so that at least one elastic member around the waist crosses the width direction of the thin-walled portion of the absorber. Disposable diapers distributed are disclosed. In Patent Document 1, it is studied to improve the fit of the absorber and eliminate the discomfort when worn by devising the thickness of the absorber and the arrangement of the constituent members in the vicinity of the absorber.

Further, in Patent Document 2, the front waist region has a first expansion / contraction region that crosses the end of the absorber, a second expansion / contraction region that is adjacent to the first expansion / contraction region and is located below in the longitudinal direction, and further. It is a disposable diaper having a third expansion / contraction region located below, and the correlation of the elongation stress of each expansion / contraction region is the second expansion / contraction region ≥ the first expansion / contraction region> the third expansion / contraction region, and the rigidity value of the absorber is Disposable diapers of 0.03 to 0.15 Ncm are disclosed. Patent Document 2 has an object of improving the fit of a disposable diaper and suppressing the displacement of an absorbent body to prevent leakage of excretory fluid.

Japanese Unexamined Patent Publication No. 2016-34341 JP-A-2009-240695

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

Therefore, in order to solve the problems of the prior art, the present inventors have an object of providing an absorbent article having an absorber exhibiting a high fit and capable of preventing leakage of excrement liquid. We proceeded with the examination. Furthermore, the present inventors have proceeded with studies for the purpose of providing an absorbent article in which the discomfort caused by the occurrence of wrinkles in the absorber and the discomfort caused by the rigidity of the absorber are reduced.

As a result of diligent 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 was found that by providing at least one of the members so as to overlap the narrow region, an absorbent article having a high fit of the absorber and eliminating the discomfort caused by the deformation and rigidity of the absorber can be obtained. It was.
Specifically, the present invention has the following configuration.

[1] The front body in contact with the wearer's abdomen, the back body in contact with the wearer's back, and the inseam located between the front and back bodies are divided in the longitudinal direction.
Absorbents placed from the front to the back,
An absorbent article having a plurality of stretchable members extending in the width direction provided in the longitudinal end region of both the front body and the back body, or one of them.
Both or one of the longitudinal end regions of the absorber is a narrow region narrower than the maximum dorsoventral 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.
[2] The absorbent article according to [1], wherein the minimum width of the narrow region is 50 to 90% of the maximum dorsoventral width of the absorber.
[3] The absorbent article according to [1] or [2], wherein the length of the narrow region in the longitudinal direction is 1 to 20% with respect to the length in the longitudinal direction of the absorber.
[4] The elastic member superposed on the narrow region is any one of [1] to [3] superposed on the region from 1 to 10 mm in the longitudinal direction inward from the longitudinal end edge of the absorber. Absorbent article described in.
[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] 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 expansion / contraction region constituent region arranged on the end side in the longitudinal direction from the narrow region overlapping region. The absorbent article according to any one of [1] to [5], where Fw> Fe, where Fw is the tensile strength (N / cm) in the width direction of.

According to the present invention, it is possible to obtain an absorbent article having a high fit of the absorber and eliminating the discomfort caused by the deformation and rigidity of the absorber.

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

Hereinafter, the present invention will be described in detail. The description of the constituent elements described below may be based on typical embodiments or 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 ventral side (front of the body) of the wearer when the diaper is worn on the wearer. "Inseam" means a portion that covers the wearer's inseam when the diaper is worn on the wearer. The "back body" means a part that covers the back side (rear body) of the wearer when the diaper is worn on the wearer.
Further, 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. Further, 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 wearer's back, and an inseam located between the front and back bodies. The front body, the back body, and the inseam located between the front body and the back body are separated in the longitudinal direction. The absorbent article of the present invention includes an absorber 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 the front body and / or the back body. Has a member. Here, both or one of the longitudinal end regions of the absorber is a narrow region narrower than the maximum dorsoventral width of the absorber. Further, at least one of the plurality of elastic members extending in the width direction is superposed on at least one of the narrow regions from the skin non-contact surface side of the absorber. Here, the longitudinal 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 narrower than the maximum dorsoventral width of the absorber is provided in both or one of the longitudinal end regions of the absorber, and the narrow region is further provided. By superimposing the elastic members, the fit of the absorber can be improved. In particular, the fit of the end of the absorber can be improved. In the present invention, since the absorber has a narrow region, wrinkles and twists are suppressed in the absorber even when the end of the absorber is pressed by the elastic member. When wrinkles or twists occur in the absorber, a gap is created between the skin and the absorber, and the excretory fluid may leak from the gap. However, in the present invention, the occurrence of wrinkles and twists is suppressed and absorbed. Since the end of the body comes into contact with the wearer's skin without gaps, leakage of excrement can be suppressed more effectively. In the present invention, the fit of the absorber can be evaluated by the fact that a gap is unlikely to occur between the skin and the absorber and that the absorber easily follows the movement of the wearer's body.

Further, in the absorbent article of the present invention, since the occurrence of wrinkles in the absorber is suppressed, the discomfort caused by the occurrence of wrinkles in the absorber is reduced. That is, the discomfort such as the ruggedness felt by wrinkling the absorber is eliminated. Then, by providing the absorber with a narrow region, it is possible to reduce the discomfort caused by the rigidity of the absorber itself.

Further, in the absorbent article of the present invention, a narrow region is provided at the end of the absorber, and the elastic member is superposed on the narrow region so that the absorber absorbs the excrement liquid and swells. However, it also has the effect that the swelling due to the swelling of the absorber becomes difficult to see from the outside. In conventional disposable diapers, when the absorber absorbs the excrement liquid and swells, the absorber portion may rise from the outer body of the diaper, resulting in poor appearance. In the absorbent article of the present invention, by superimposing the elastic member on the narrow region, when the absorbent body swells, the bulge due to the swelling can be suppressed from the skin non-contact surface side of the absorbent body, and the appearance deteriorates. Can be prevented. Further, in the absorbent article of the present invention, since the absorbent body has a narrow region, the end portion of the absorbent body is less likely to be affected by the bulge due to swelling, and the outer body of the diaper to the absorbent body portion The ridge is hard to see.

The form of the absorbent article of the present invention is not particularly limited, and 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. Pants-type disposable diapers are disposable diapers in which both front and back bodies are pre-joined. The pants-type disposable diaper may be a cross-linked type having a structure in which the absorption unit main body bridges between the front body exterior body and the back body exterior body, which are formed as separate bodies. In addition, the pants-type disposable diaper is an integrated type in which the absorption part body is fixed around the crotch to the exterior body that is integrally formed by hanging from the front body through the inseam to the back body. May be good. The tape-type disposable diaper is a type of disposable diaper in which bonding tapes are attached to both sides of the front body or the back body, and the front body and the back body are joined by using the bonding tape when worn.
In the following, among these various types of absorbent articles, the contents of the present invention will be specifically described by taking a pants-type disposable diaper as an example.

(Structure of pants-type disposable diapers)
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. 2 and 3 are development views showing an 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 which is in contact with the wearer's abdomen when worn, the back body 2 which is in contact with the wearer's back, and the inseam of the wearer. It has an inseam 3. In the present embodiment, in the disposable diaper, the front body 1 is formed by the front body exterior body 10, and the back body 2 is formed by the back body exterior body 20. The absorbing portion main body 30 is bridged to the inseam 3 between the front body exterior body 10 and the back body exterior body 20. That is, one end of the absorbing portion main body 30 is fixed to the front body exterior body 10, and the other end of the absorbing portion main body 30 is fixed to the rear body exterior body 20. For example, a hot melt adhesive or the like is used to fix each exterior body and the absorption unit main body 30.

From the unfolded state shown in FIGS. 2 and 3, the front body exterior body 10 and the rear body exterior body 20 are assembled into the state shown in FIG. 1 by joining both ends in the width direction. 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 back body exterior body 20. Further, by joining both ends of the front body exterior body 10 and the back body exterior body 20, a leg opening 5 located around the wearer's legs at the time of wearing is formed.

As shown in the plan view of FIG. 2, a plurality of telescopic members 43 extending in the width direction are provided in the longitudinal end region of the disposable diaper. In FIG. 2, the telescopic member 43 is shown by a dotted line. As shown in FIG. 2, the plurality of telescopic members 43 are arranged at predetermined intervals in the longitudinal direction of the 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 which has been subjected to the Tammy cut, which will be described later, and in the front body exterior body 10 or the back body exterior body 20, a series of elastic members without being cut in the middle. It has become.

The plurality of elastic members 43 are sandwiched between the inner sheet 41 and the outer sheet 42, and at least a part thereof is fixed to the inner sheet 41 and / or the outer sheet 42. The inner sheet 41 and the outer sheet 42 sandwich a plurality of elastic members 43 to form an end 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 being extended along the width direction. The entire 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 in a state of being fixed between 42, and other parts need not be in a state of being fixed to each sheet. By fixing only a part of the elastic member 43, the waist region can be easily moved according to the movement of the body, and the fit feeling at the time of wearing can be improved. Further, by fixing only a part of the elastic member 43, the absorber is less likely to be twisted or wrinkled, and the appearance when worn is improved.

The elongation rate 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 lengths of the stretchable members in the stretched state when the length (actual size) of the stretchable members in the non-stretched state (free state) is 100%. is there. In this way, the stretchable member 43 in the stretched state is fixed between the inner sheet 41 and the outer sheet 42, so that when the stretchable member 43 contracts, wrinkles (gathers) 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 placed between the inner sheet 41 and the outer side. It may be sandwiched 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 may be sandwiched between the sheets 41 and fixed.

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 integrally formed. That is, one sheet member may be folded back at the end edge in the longitudinal direction of the disposable diaper, and a plurality of elastic members 43 may be sandwiched and fixed between them. In this case, the portion located inside the folding line is the inner sheet 41, and the portion located outside the folding line is the outer sheet 42. As described above, in the present invention, the inner sheet 41 and the outer sheet 42 can be composed of one sheet member.

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

FIG. 4 is a cross-sectional view taken along the line YY of the developed plan view shown in FIG. In this embodiment, as shown in FIG. 4, the inner sheet 41 extends in the direction of the inseam 3 of the diaper. A part of the inner sheet 41 is superposed on the end portion (skin contact surface) of the absorbing portion main body 30 in the longitudinal direction. By superimposing a part of the inner sheet 41 on the absorbing portion main body 30 in this way, the fixing stability of the absorbing portion main body 30, the front body exterior body 10 and the back body exterior body 20 can be improved.

The front body exterior body 10 and the back body exterior body 20 may each 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 inseam 3, and a part thereof is located on the skin non-contact surface side of the absorbing portion main body 30. .. Here, the inner sheet 45 is arranged on the skin contact surface side of the extending portion of the outer sheet 42. Then, one or a plurality of elastic members 43 are sandwiched between the extending portion of the outer sheet 42 and the inner sheet 45.
The front body exterior body 10 and the rear body exterior body 20 do not have to have the inner sheet 45 as a constituent member. In this case, the inner sheet 41 may extend to the skin non-contact surface side of the absorbing portion main body 30.

The absorption unit 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 inseam of the wearer when wearing a disposable diaper, such as urine excreted by the wearer. Absorbs and retains the liquid. As shown in FIG. 4, the absorption unit 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 arranged 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 known material can be used as the absorbent material constituting the absorber 31. As the absorbent material, for example, flap pulp, a highly absorbent polymer, or a hydrophilic sheet may be used. The absorber 31 is preferably encapsulated by the core wrap sheet 36. As the core wrap sheet 36, tissue paper, absorbent paper, non-woven fabric subjected to hydrophilic treatment, or the like can be appropriately used.

The core wrap sheet 36 covers the absorber 31, and the shape of the core wrap sheet 36 may be the same as that of the absorber 31 or 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 absorber 31.

The top sheet 32 is a member that comes into direct contact with the skin of the wearer's inseam and allows a liquid such as urine to permeate through the absorber 31. Therefore, the top sheet 32 is made of a highly flexible liquid permeable material. Further, the top sheet 32 is arranged so as to cover the skin contact surface side of the absorber 31. Examples of the liquid permeable material constituting the top sheet 32 are a woven fabric, a non-woven fabric, or a porous film. Further, as the top sheet 32, for example, a fiber of a thermoplastic resin such as polypropylene, polyethylene, polyester or nylon may be hydrophilized to be further made into a non-woven fabric.

The back seat 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. Therefore, the back sheet 33 is made of a liquid-impermeable material. The back sheet 33 covers the absorber 31 from the skin non-contact surface side in order to prevent liquid leakage from the bottom surface of the absorber 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 attached to the skin non-contact surface side of the back sheet 33. As a material constituting the cover sheet 34, a woven fabric or a non-woven fabric is used. In particular, as a material constituting the cover sheet 34, it is preferable to use a non-woven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester, or a wet non-woven fabric.

As shown in FIG. 2, the absorption unit main body 30 may include a pair of three-dimensional gathers 35. The pair of three-dimensional gathers 35 are members that stand up along both side edges of the absorber 31 to prevent lateral leakage of urine excreted by the wearer. A three-dimensional gather elastic material is arranged at the tip of each of the three-dimensional gathers 35, and when the elastic material contracts, it stands up in the direction of contact with the skin of the wearer. Therefore, the pair of three-dimensional gathers 35 serve as a urine leak-proof wall, and urine that has not penetrated the top sheet 32 and urine that has not been completely absorbed by the absorber 31 leaks from the leg opening of the disposable diaper or the like. Prevent side leakage. As the three-dimensional gather 35, a known configuration used for a conventional disposable diaper can be adopted. The three-dimensional gather 35 can be formed, for example, by sandwiching and fixing a three-dimensional gather elastic material in an stretched state between layers of the water-repellent sheet. As the water-repellent sheet, for example, a non-woven fabric sheet obtained by a manufacturing method such as card embossing or spunbond can be used, and it is particularly preferable to use a non-woven fabric sheet such as SMS or SMMS, which has high waterproofness.

As shown in FIG. 2, the front body exterior body 10 and the rear body exterior body 20 may be provided with the Tammy telescopic member 46, respectively. The Tammy telescopic member 46 is a member arranged on the lower crotch 3 side of the front body exterior body 10 and the back body exterior body 20 with respect to the end region in the longitudinal direction. That is, the Tammy telescopic member 46 is an elastic member provided in the Tammy region located on the lower crotch 3 side of the waist region. Usually, in the front body exterior body 10 and the back body exterior body 20, the region from the longitudinal end edge of the absorber to the longitudinal end edge of each of the front body exterior body 10 and the back body exterior body 20 is referred to as a waist region. The area on the lower crotch 3 side of the area is called the Tammy area. When the waist region and the tammy region are distinguished as described above, in the present invention, at least one of the elastic members 43 (waist elastic member) is provided in the tammy region.

In the present specification, the Tammy telescopic member 46 refers to an elastic member that is cut at the central portion in the width direction. The stretchable member 43 described above is a stretchable member mainly provided in the waist region, and such a stretchable member 43 is a series in the front body exterior body 10 and the back body exterior body 20 in the width direction. The Tammy telescopic member 46 is distinguished from the telescopic member 43 by the presence or absence of a cut.

Cutting the telescopic member like the Tammy telescopic member 46 is a method called Tammy cut. When the tammy telescopic member 46 is arranged, it is fixed between the extending portion of the outer sheet 42 and the inner sheet 45 in a stretched state along the width direction of the diaper, similarly to the telescopic member 43. Then, after being fixed, it is cut at the midpoint in the width direction of the Tammy telescopic member 46. By applying such a tammy cut, it is possible to form a structure that does not overtighten the lower abdomen. Since a part of the Tammy telescopic member 46 contracts due to the Tammy cut, the Tammy telescopic member 46 is not stretched in the central region of the front body exterior body 10 and the back body exterior body 20 in the width direction.

(Shape of absorber)
In the present invention, the absorber 31 has a narrow region. The narrow region is a region provided at the end region in the longitudinal direction of the absorber, and is a region narrower than the maximum dorsoventral width of the absorber. Here, the maximum dorsoventral width of the absorber is the maximum width of the absorber 31 in the region where the absorber 31 overlaps the front body exterior body 10 or the back body exterior body 20. In the present specification, the maximum dorsoventral width of the absorber 31 is the longitudinal direction of the main body region in which the longitudinal end region is connected when the absorber 31 is divided into a longitudinal end region and a main body region other than the end region. It can be said that it is the width of the end portion on the end region side.

The narrow region refers to a region narrower than the width of the end region side of the main body region of the absorber 31 in the longitudinal direction, and refers to a region in which 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, for example, the aspect in which the corners of the absorber are slightly rounded.

FIG. 5 is a plan view illustrating the shape of the absorber 31. As shown in FIG. 5, the absorber 31 has a narrow region 31a. The absorber 31 may have a rectangular outer shape, or may have a constricted central portion in the longitudinal direction (so-called hourglass shape) as shown in FIG. When the absorber 31 has an hourglass shape, the width of the central region is narrow, but such a region is different from the narrow region provided in the end region in the longitudinal direction.

The minimum width of the narrow region 31a is preferably 50 to 90%, more preferably 60 to 85% of the maximum dorsoventral width of the absorber. Here, the minimum width of the narrow region 31a is represented as P in FIG. 5, and the maximum dorsoventral width of the absorber is represented as Q. In the present invention, the P / Q value 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 absorber 31 with a narrow region 31a that satisfies the above conditions, the fit of the end region of the absorber 31 is enhanced, and thus leakage of excrement liquid can be prevented. Further, by providing the absorbent body 31 with a narrow region, it is possible to relax the development of the rigidity of the absorbent body, and it is possible to eliminate the discomfort felt when wearing the absorbent article 100 (disposable diaper).

The longitudinal length of the narrow region 31a is preferably 1 to 20%, more preferably 2 to 15%, and preferably 3 to 10% with respect to the longitudinal length of the absorber. More preferred. Here, the longitudinal length of the narrow region 31a is represented as S in FIG. 5, and the longitudinal length of the absorber is represented as R. In the present invention, the S / R value 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 meet the above conditions, the fit of the end region of the absorber 31 is enhanced, and leakage of the excrement liquid can be prevented. Further, it is possible to eliminate the discomfort during wearing due to the deformation and rigidity of the absorber.

The longitudinal length (R) of the absorber 31 is the length from the longitudinal end edge of the front body exterior body 10 of the absorbent article to the longitudinal end edge of the back body exterior body 20 (longitudinal overall length of the absorbent article). On the other hand, it is preferably 70 to 90% or less. Conventionally, in order to reduce the discomfort caused by the rigidity of the absorber, it has been considered to reduce the size of the absorber itself, but when the size of the absorber is reduced, the rigidity tends to be reduced. However, the excrement was liable to leak. The present invention is characterized in that the length (R) of the absorber 31 in the longitudinal direction is not reduced and a narrow region is provided in the absorber 31, and such an embodiment suppresses leakage of excrement. At the same time, it is possible to reduce the discomfort during wearing due to the deformation and rigidity of the absorber.

The narrow region 31a is preferably 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 in the longitudinal direction, but the narrow region 31a is provided on the upper end side in the longitudinal direction of the absorber 31. It may be provided in either one selected from the narrow region 31a and the narrow region 31a on the lower end side. When the narrow region 31a is provided in only one of them, it is preferable that the narrow region 31a is provided in the longitudinal end region arranged on the back body side.

When the narrow region 31a is provided in both the narrow region 31a on the upper end side and the narrow region 31a on the lower end side in the longitudinal direction of the absorber 31, the narrow region 31a on the upper end side and the narrow region 31a on the lower end side are provided. 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 of the longitudinal end region arranged on the back body side may be made larger or smaller than the narrow region 31a of the longitudinal end region arranged on the front body side. You can also do it. Further, the shape of each narrow region 31a can be different. 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 illustrating another shape of the absorber 31. The shape of the absorber 31 may be, for example, a shape as shown in FIGS. 6 (b) to 6 (d) in addition to the shape shown in FIG. 6 (a). In FIG. 6A, the outline of the narrow region 31a is curved, but in FIGS. 6B and 6C, the outline of the narrow region 31a is linear. The width of the narrow region 31a may be gradually narrowed toward the edge as shown in FIG. 6 (b), and the width of the narrow region is a constant width as shown in FIG. 6 (c). You may. Further, as shown in FIG. 6D, the width of the narrow region 31a may be 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, and 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 either the longitudinal and width directions, but the thickness of both or one of the longitudinal end regions is greater than the thickness of the central region of the absorber. It may be thin. 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 of the absorber 31 in the longitudinal direction is W, ∨ / W may be 0.3 to 0.9, which is 0. .5 to 0.8 may be used. By adjusting the thickness of the absorber 31 in this way, the discomfort caused by the absorber felt when worn can be 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 easier to prevent a gap from being formed between the skin and the absorber, and the fit of the absorber end portion is easy to prevent. It becomes easier to prevent the leakage of excrement.

In the present invention, at least one of the telescopic members 43 has a part thereof superimposed on at least one of the narrow regions 31a of the absorber 31. FIG. 3 shows a state in which the absorbent article 100 is viewed from the skin non-contact surface side. In FIG. 3, the shape of the absorber 31, which is originally invisible, is drawn by a dotted line for convenience. As shown in FIG. 3, one of the telescopic members 43 is superimposed on the narrow region 31a of the absorber 31. In FIG. 3, a state in which a part of one telescopic member 43 is superposed on the narrow region 31a is shown, but the number of superposed telescopic members 43 may be two or more.

When narrow regions 31a are provided at both ends of the absorber 31, the telescopic member 43 may be superimposed on both or one of the narrow regions 31a. When the telescopic member 43 is superposed on only one of the narrow regions 31a, it is preferable that the telescopic member 43 is superposed on the narrow region 31a existing on the front body 1 side. By superimposing the elastic member 43 on the narrow region 31a of the front body 1, it is possible to fit the end of the absorber to the contraction of the abdomen, especially the difference between after meal and fasting, and the difference between sitting and standing. It becomes possible to prevent discomfort and leakage when worn.

In the present invention, by superimposing at least one of the elastic members 43 on the narrow region 31a, even when the absorber 31 absorbs the excrement liquid and swells, the absorber portion is removed from the outer body of the diaper. It can be prevented from rising. As a result, the wearing appearance can be maintained in a good state even after excretion. Further, by superimposing at least one of the expansion / contraction members 43 on the narrow region 31a, the absorber 31 can easily follow the movement of the exterior body. As a result, the fit of the absorber 31 can be improved, and the leakage of the excrement liquid can be prevented more effectively.

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

Further, it is preferable that the expansion / contraction member 43 is superimposed near the center line of the length in the longitudinal direction of the narrow region 31a. Specifically, it is preferably superimposed in the range of ± 20% of the length in the longitudinal direction from the center line, and more preferably superimposed in the range of ± 10%.
As described above, by arranging the elastic member 43 superimposed on the narrow region 31a in the predetermined region, even when the absorber 31 absorbs the excrement liquid and swells, the outer body of the diaper can be used. It is possible to prevent the absorber portion from rising more effectively. Further, by arranging the elastic member 43 superimposed on the narrow region 31a in a predetermined region, it becomes easy to follow the movement of the exterior body in the region other than the narrow region of the absorber 31, so that the absorber 31 can be easily followed. The overall fit can be further improved.

In the present invention, as described above, by superimposing at least one of the expansion / contraction members 43 on the narrow region 31a, the expansion / contraction member 43 also has an advantage that the absorber 31 can be pressed with less force. .. For example, when the telescopic member 43 is superimposed on the region having the maximum dorsoventral width of the absorber 31, a larger force is required to hold down the absorber 31. On the other hand, in the present invention, by superimposing at least one of the expansion / contraction members 43 on the narrow region 31a, the force for pressing the absorber 31 can be reduced. That is, even if the tension of the telescopic member 43 superimposed on the narrow region 31a or the strength of the member itself is reduced, the above-mentioned effect can be sufficiently exhibited.

Further, 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 set to 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 constituent region is Fw, it is preferable that Fw> Fe. By setting the tensile strength of each region to a strength that satisfies the above conditions, the difference in thickness of the absorber can be alleviated and a natural fit can be obtained.
Here, the tensile strength (N / cm) in the width direction of the narrow region overlapping region represented as Fe is a component (expandable member) superimposed on the narrow region of the absorber 31 in the front body 1 or the rear body 2. And the sheet), which is the tensile strength in the width direction of the constituent members (expandable members and the sheet) located on the skin non-contact surface side with respect to the absorbing portion main body 30. Specifically, it is the tensile strength in the width direction of the constituent members (expandable members and the sheet) superimposed on the region shown by the region E in FIG. When measuring the tensile strength, first, the side seal portion of the disposable diaper is peeled off and unfolded as shown in FIG. 2, and then the stretchable member provided on the exterior body is stretched to measure the maximum stretched length. .. Next, the narrow region overlapping region (E) and the expansion / contraction region (W) are cut out. When cutting, the center line between the adjacent elastic members (the vertical central portion between the adjacent elastic members) is cut, and the vertical region width (cm) of each region is measured. This sample was stretched at a speed of 200 mm / min with a tensile tester, the load (N) at a length of 65% of the maximum stretch length was measured, and the load (N) was divided by the region width (cm) per unit width. Calculate the strength.
Further, the tensile strength (N / cm) in the width direction of the stretchable region constituent region represented as Fw is all the configurations superposed on the stretchable region arranged on the longitudinal end side of the narrow region of the absorber. It is the tensile strength in the width direction of the members (expandable members and sheets). Specifically, it is the tensile strength in the width direction of the constituent members (expandable members and the sheet) superimposed on the region shown by the W region of FIG. The method for measuring the tensile strength in the width direction of the stretchable region constituent region is the same as described above.

1 Front body 2 Back body 3 Inseam 4 Waist opening 5 Leg opening 10 Front body exterior body 20 Back body exterior body 30 Absorbent body 31 Absorbent body 31a Narrow area 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)

The front body in contact with the wearer's abdomen, the back body in contact with the wearer's back, and the inseam located between the front body and the back body are divided in the longitudinal direction.
Absorbents arranged from the front body to the back body,
An absorbent article comprising a plurality of stretchable members extending in the width direction provided in the longitudinal end region of both or one of the front body and the back body.
Both or one of the longitudinal end regions of the absorber is a narrow region narrower than the maximum dorsoventral width of the absorber.
A part of at least one of the stretchable members is superimposed on at least one of the narrow regions from the skin non-contact surface side of the absorber, and the stretchable member absorbs the absorbent body in a region other than the narrow region. Absorbent article that is not superimposed on the body. The absorbent article according to claim 1, wherein the minimum width of the narrow region is 50 to 90% of the maximum dorsoventral width of the absorber. The absorbent article according to claim 1 or 2, wherein the length of the narrow region in the longitudinal direction is 1 to 20% with respect to the length in the longitudinal direction of the absorber. The elastic member superimposing on the narrow region corresponds to any one of claims 1 to 3 superimposing on the region from the longitudinal end edge of the absorber to the inside in the longitudinal direction from 1 to 10 mm. The absorbent article described. The absorbent article according to any one of claims 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. 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 constituent region is arranged 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, where Fw> Fe, where Fw is the tensile strength (N / cm) in the width direction of.

Images