JPH10328232A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article, which when worn takes a predetermined shape with an excellent fit, using simple constitution without requiring a large amount of materials, and which has an leak-preventing property. SOLUTION: In an absorbent article 1, which includes a liquid-permeable layer on its. side abutting to the skin, a liquid-impermeable layer on its side not abutting to the skin, and an absorbing part interposed between the liquid- permeable layer P and the liquid-impermeable layer, and which is made substantially oblong, a raised part 13a raised toward the abutting side to the skin and extending in the longitudinal direction of the absorbent article 1 is provided at the center of the absorbing part, and a pair of grooves 17, 17 extending in the longitudinal direction of the absorbent article 1 are provided in the side of the absorbing part corresponding to the raised part 13a and not abutting to the skin. The liquid-impermeable layer comprises a liquid-impermeable back sheet 12b, which is arranged on a plane and not grooved along the pair of grooves 17, 1 7 in the absorbing part A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article such as a sanitary napkin or an incontinence pad which is attached to a human crotch and absorbs bodily fluids. The present invention relates to an absorbent article which has a predetermined shape with excellent fit at the time of mounting and has excellent leakage prevention.

[0002]

2. Description of the Related Art In general, a liquid permeable layer is provided on the skin contacting surface side, a liquid impermeable layer is provided on the non-skin contacting surface side, and the liquid permeable layer and the liquid impermeable layer are not provided with the liquid permeable layer. Absorbent articles with an intervening absorber are well known. Such absorbent articles are used as sanitary napkins, incontinence pads, panty liners and the like, and it is important that they fit well to the wearer and prevent leakage well.

[0003] For this reason, various techniques have been proposed in the related art for forming an absorbent article with its center in the width direction higher toward the skin-contacting surface so that the absorbent article can be fitted well to a wearer to avoid leakage. In the technique described in Japanese Patent Application Laid-Open No. 61-56647, the entire absorbent article is folded so that the center in the width direction has a middle height toward the skin contact surface. In addition, Japanese Patent Publication No. 5-7341
In the technique described in Japanese Patent Application Laid-Open No. 9-29, another absorbent article is stacked at the center in the width direction to have a middle height. Further, Japanese Unexamined Patent Publication No.
In the technology described in Japanese Patent Application Laid-Open No. 117277, a second absorbent body made of synthetic fiber is provided integrally at the center in the width direction of an absorbent body having a uniform thickness by embossing to have a middle height. In the technique described in Japanese Patent Application Laid-Open No. 8-38550, an absorber having a medium to high thickness is manufactured from wood pulp or synthetic fiber and used at the stage of forming the absorber.

However, in the technique of folding the entire absorbent article as described in JP-A-61-56647, a member such as a back sheet for forming a liquid impermeable layer is interposed between the absorbing parts. Therefore, there is a problem that the body fluid transfer property is not excellent and the substantial body fluid absorption ability is not increased so much that the leakage prevention effect is insufficient, and that a large amount of all constituent materials are required. is there. In the technique described in Japanese Patent Publication No. 5-73419, in which absorbent articles are stacked at the center in the width direction, a liquid-impermeable member such as a back sheet between absorbers of the stacked absorbent articles is interposed. Therefore, there is a problem that the body fluid transferability is not excellent, the substantial body fluid absorption capacity is not so much increased, the leak prevention effect is insufficient, and the structure is complicated. Japanese Patent Application Laid-Open No. H8-117277 discloses a technique in which a synthetic fiber second absorber is integrally provided at the center in the width direction, and Japanese Patent Application Laid-Open No. H8-3855.
In the technique of manufacturing and using middle and high absorbers as described in Japanese Patent Publication No. 0, the absorption capacity at the center in the width direction is increased, but the side edges are easily twisted, and the fit at the side edges is impaired. Could lead to leakage.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an absorbent article which has a simple structure which does not require a large amount of material, has a predetermined shape which is excellent in fitting when mounted, and which is excellent in leakage prevention. .

According to the present invention, there is provided a liquid permeable layer on the skin contact surface side, a liquid impermeable layer on the non-skin contact surface side, and an absorbing portion interposed between the liquid permeable layer and the liquid impermeable layer. An absorbent article formed substantially vertically, comprising, at a central portion of the absorbent section, a raised section extending in the longitudinal direction of the absorbent article raised to the skin contact surface side, the raised section The non-skin contact surface side of the absorbent portion corresponding to the above, is provided with a groove extending in the longitudinal direction of the absorbent article, the liquid impermeable layer comprises a liquid impermeable back sheet, the back sheet Has achieved the above-mentioned object by providing an absorbent article characterized in that it is arranged in a planar shape and is not subjected to groove processing along the groove of the absorbing section.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the absorbent article according to the present invention will be specifically described below with reference to the drawings. FIG. 1 is a plan view showing a sanitary napkin as one embodiment of the absorbent article of the present invention as viewed from the skin contact surface side, and FIG. 2 is a cross-sectional view of the sanitary napkin of FIG. FIG. 3 is a sectional view taken along line II of the absorbent body of the sanitary napkin of FIG. 1, FIG. 4 is a sectional view taken along line JJ of the sanitary napkin of FIG. 1, and FIG. 1 is an enlarged plan view of the sanitary napkin absorbent body viewed from the non-skin contact surface side, FIG. 6 is a sectional view taken along line KK of the sanitary napkin absorbent body of FIG. 1, and FIG. 7 is FIG. FIG. 8 is a cross-sectional view taken along the line II of FIG. 8, showing a state of attachment of the sanitary napkin, and FIG. 8 is a view showing a part of the manufacturing process of the sanitary napkin of FIG.

As shown in FIG. 1 or 2, the absorbent article (sanitary napkin) 1 of the present embodiment has a liquid permeable layer P on the skin contact surface side and a liquid impermeable on the non-skin contact surface side. It is provided with a layer I and an absorbing portion A interposed between the liquid permeable layer P and the liquid impermeable layer I, and is formed substantially vertically.

More specifically, in the sanitary napkin 1 of the present embodiment, the liquid permeable layer P is a liquid permeable surface sheet 1
1, the liquid impermeable layer I is formed by a first back sheet 12a and a second back sheet 12b, which are liquid impermeable sheets, and the absorbing portion A is formed by the absorber 13. Have been. Then, in the sanitary napkin 1 of the present embodiment, as shown in FIG. 2, the surface of the absorbent body 13 on the non-skin contact surface side, the both side surfaces, and the both side edges of the surface on the skin contact surface side are the second. The absorber 13 and the second back sheet 12b are covered with the top sheet 11b.
The napkin main body 10 is formed by being sandwiched between the first back sheet 12a and the first back sheet 12a arranged on the non-skin contact surface side of the second back sheet. The napkin body 10 has heat-welded portions on both side edges from the skin contact surface side, and heat-welded portions 14, 14 in which the topsheet 11 and the second backsheet 12 b are heat-welded to the absorber 13. Are formed. The topsheet 11 and the absorber 13 are fixed to each other at the side edges of the napkin body 10 by heat welding to form heat-welded portions 14, 14.
The second back sheet 12b and the absorber 13 are fixed to each other at the side edges of the napkin body 10 by hot melt agents 15, 15.

The top sheet 11 and the first back sheet 12a extend outward from the left and right side edges of the napkin body 10 in the width direction, and have wings 20, 20 formed therein. The top sheet 11 and the first back sheet 12a are fixed to each other at their peripheral edges.

An adhesive is applied to the first back sheet 12a at the center in the longitudinal direction of the napkin body 10 to form an adhesive portion 16. The sanitary napkin is attached via the adhesive portion 16 at the time of mounting. 1 is fixed to the underwear. The adhesive portion 16 is protected by a release paper (not shown).

These structures are the same as those of the conventional sanitary napkin. As the material for forming the topsheet 11, a conventionally used material such as a nonwoven fabric or an apertured film can be used without any particular limitation. it can. The first
As the material for forming the back sheet 12a and the second back sheet 12b, conventionally used materials such as a leak-proof film, polyethylene-laminated waterproof paper, and polyethylene-laminated non-woven fabric can be used without any particular limitation. Further, the heat-welded portions 14, 14 can be provided by using the conventional technique without any particular limitation, and the hot-melt agents 15, 15 which are conventionally used can be used without any particular limitation. The adhesive section 16 can also be provided by using a conventional adhesive without any particular limitation and using a conventional technique without any particular limitation.

The sanitary napkin 1 according to the present embodiment is provided at the central portion of the absorbent body 13 as shown in FIGS. And a pair of grooves 17, 17 extending in the longitudinal direction of the sanitary napkin 1 is provided on the non-skin contact surface side of the absorbent body 13 corresponding to the above-mentioned elevated portion 13a. ing.

More specifically, in the sanitary napkin 1 of the present embodiment, the raised portion 13a of the absorber 13 is
As shown in FIG. 1, the absorber 13 is formed from the center to the rear of the absorber 13. The center of the absorber 13 is formed wider and tapered toward the rear. In the central portion, the front side and the rear side are the widest, and are slightly narrowed therebetween, so that the side edges are formed to have an arc shape that is convex inward in the width direction. The raised portion 13a is provided with the raised portion 13a.
In order to make the body contact the body fluid excretion part of the wearer without any discomfort and to obtain an excellent leak-proof property, the width W at the most front side is required.
₁ is 20 to 60 mm, the width W ₂ of the narrowest portion in the central portion is preferably 15 to 40 mm.
Further, the arc-shaped side edge of the raised portion 13a at the center of the absorber 13 has a radius of curvature of 30 to 300 mm in order to obtain a good fit to the body fluid leaking portion of the wearer.
It is preferable that the width W _{2 at the} center is 15
If it is ４０40 mm, it may be a rectangular shape for ease of manufacture.

The absorber 13 has a capacity of 2.5 g / cm.^TwoWeight
Thickness of lower portion where raised portion 13a is formed
(T shown in FIG. 3₁) Is 7 mm and the raised portion 13a is formed.
The thickness of the portion not shown (T shown in FIG. 3)_Two) Is 4mm
Height of the raised portion 13a (the shape of the raised portion 13a).
Formed part and part where the raised part 13a is not formed
The difference in thickness from the minute, T shown in FIG._Three) Is 3mm
You. 2.5 g / c of the portion where the raised portion 13a is formed
m^TwoThickness T under load ₁Is 3 to 15 mm
And more preferably 5 to 12 mm.
If it is less than 3 mm, a good fit at the center is obtained.
If it exceeds 15mm, it will be too thick and uncomfortable
This is not preferred. Raised portion 13a of absorber 13
2.5 g / cm of the part where no is formed^TwoUnder weight
Thickness T_TwoIs preferably 1 to 10 mm, and 2
More preferably, it is 7 mm. Less than 1mm rigid
Sanitary napkin
The cross-sectional shape at the time of wearing 1 is a preferable arch form
Difficult to form and maintain, rigid at more than 10 mm
Too high or the sanitary napkin 1 becomes too thick
Too much, and the discomfort at the time of wearing increases. Takashi
2.5g / cm of the raised part 13a^TwoUplift height under load
T_ThreeIs excellently fitted to the body fluid leaking part of the wearer
In order to obtain leakage prevention, the diameter is preferably 2 to 10 mm.
Preferably, it is 2 to 7 mm.

The material constituting the absorber 13 is as follows.
Conventionally known materials constituting the absorber, such as fluff pulp, absorbent paper, and superabsorbent polymer, can be used without any particular limitation, but the grooves 17, 17 of the raised portion 13a of the absorber 13 can be used. The bending stiffness in the width direction toward the non-skin contact surface side (the bending stiffness such that the cross section in the length direction is held linearly) in the portion where no is provided is 1 to 10
Those having a gf · cm / 3 cm are preferable. If the bending stiffness in the width direction is less than 1 gf · cm / 3 cm, the absorber at the protruding portion is too soft and distorted, resulting in 10 gf / cm / 3 cm.
Beyond that, on the contrary, the rigidity is too high, and it becomes uncomfortable. The bending stiffness is determined in the longitudinal direction (for sanitary napkin 1).
A sample (absorber having a thickness similar to that of the raised portion 13a and having no grooves 17, 17) having a length of 30 mm and a width of 70 mm (width direction of the sanitary napkin 1) is provided by Kato Tech. The sample was held by chucks at 1 cm intervals using a pure bending tester, and the curvature was K = −2.5 to
Deformation speed 0.50 (cm) in the range of +2.5 (cm ^-1 )
^The bending moment M is measured by performing a pure bending at a constant velocity curvature of ^-1 ) / sec, and a bending moment (M) -curvature (K) curve per unit of length of the sample at K = 0.5 to 1.5. Is the bending stiffness per unit area (B), which is the slope of.

As shown in FIG. 1, the pair of grooves 17 are formed symmetrically in a left-right symmetrical arc shape projecting inward in the width direction of the sanitary napkin 1 in plan view. It is arranged at a position corresponding to a predetermined distance inside the side edge at the center of the raised portion 13a. These grooves 17,1
Distance W ₃ between the innermost portions in the width direction of the sanitary napkin 1 of 7 has a 5 to 30 mm. The bending stiffness in the width direction of the raised portion 13a of the absorber 13 toward the non-skin contact surface side in the portion where the grooves 17, 17 are provided is 0.2 to 2 gf · cm. That is, the grooves 7 functioning as flexible shafts in the raised portions 13a.
The bending rigidity of the portion where the groove 17 is not provided is preferably 1.5 times or more, more preferably 2 to 10 times, the bending rigidity of the portion where the groove 17 is provided. When the bending rigidity ratio is less than 1.5,
This is because it is difficult to take a desirable mounting form that fits the excretory part at the time of mounting since the positive bending of the flexible shaft portion is eliminated. The bending rigidity of the portion provided with the groove 7 functioning as a flexible shaft is such that the longitudinal direction (the longitudinal direction of the sanitary napkin 1) is 30 mm, and the width direction (the sanitary napkin 1 width direction) is 70 mm. Grooves 17 and 17 are formed on the non-skin contact surface side of the absorber having the same thickness as the portion 13a.
The bending stiffness per unit area (B), which is the slope of the bending moment (M) -curvature (K) curve per unit of length of the sample, when a sample subjected to the same groove processing as that described above is used as the sample, is obtained. It is a thing.

Further, the radius of curvature of the grooves 17, 17 is 30.
It is preferably about 300 mm, but may be a straight line like the raised part. Also, the depth D of the grooves 17, 17
₁ (see FIG. 3) is 0.5 to 10 mm, and the ratio (D ₁ / T ₁ ) of the depth D ₁ of the groove to the thickness T ₁ of the raised portion is:
It is preferably 0.05 to 0.7, and the depth D ₁ is 1
And the ratio (D ₁ / T ₁ ) is 0.1 to 0.1 mm.
More preferably, it is 5. Depth D _{1 of} grooves 17, 17
When the ratio is less than 0.5 mm and the ratio (D ₁ / T ₁ ) is less than 0.05, it is difficult to obtain flexibility in the groove portion, and it is difficult to obtain a preferable fitting property. ₁ is 1
When it exceeds 0 mm and the ratio (D ₁ / T ₁ ) exceeds 0.7,
The groove portion is compressed at a high density, and the thickness of the entire raised portion is reduced, which is not preferable.

Further, as shown in FIGS. 1 and 4, the absorbent body 13 of the sanitary napkin 1 of the present embodiment has a longitudinal portion of the sanitary napkin 1 at the center in the width direction on the non-skin contact surface side at the rear portion. The rear groove 18 functions as a flexible shaft at the rear of the absorbent portion 13 when the sanitary napkin 1 is mounted, and the rear groove 18 extends in the width direction of the rear of the sanitary napkin 1. The center is easily deformed into an inverted V-shape and fits well on the wearer's buttocks.

The bending stiffness in the width direction of the absorber 13 toward the non-skin contact surface side in the portion where the rear groove 18 is provided is 0.2 to 2 gf · cm. The bending stiffness is 3 in the longitudinal direction (the longitudinal direction of the sanitary napkin 1).
0mm, 70m in width direction (width direction of sanitary napkin 1)
m of the absorber having the same thickness as that of the raised portion 13a and having the same groove processing as the rear groove 18 formed on one surface of the non-skin contact surface side, per unit length of the sample. The bending stiffness per unit area (B), which is the slope of the bending moment (M) -curvature (K) curve, is obtained. Also,
The depth D of the rear groove 18 and the ridge T of the depth D
A preferred range of the ratio ₁ in the thickness (D / T ₁₎ is the same as in the above-mentioned grooves 17 and 17, less than the depth D of the groove 18 is 0.5 mm, the ratio (D / T ₁₎ is zero. If it is less than 05, it is difficult to obtain flexibility in the groove portion and it is difficult to obtain a favorable fit, so that it is not preferable.
If the ratio exceeds (mm) and the ratio (D / T ₁ ) exceeds 0.7, the groove portions are compressed at a high density, and the thickness of the entire raised portion is undesirably reduced.

On the non-skin contact surface side of the absorber 13, the second back sheet 12b is disposed in a planar shape.
The first back sheet 12a is arranged in a plane on the non-skin contact surface side of the back sheet 12b. The grooves 1 of the absorber 13 are provided on both back sheets 12a and 12b.
The grooves along the grooves 7, 17 and the rear groove 18 are not formed.

The napkin body 10 of the sanitary napkin 1 of the present embodiment has a pair of tables formed symmetrically by embossing both the topsheet 11 and the absorber 13 from the skin contacting surface side. Grooves 19, 19 are provided. The front grooves 19, 19 are formed on the surface of the absorbent body 13 on the skin contact surface side.
Along the outer side of the side edge of the raised portion 13a, a convex arc shape is formed toward the inside in the width direction of the sanitary napkin 1 in a plan view. It is easily deformed as a flexible shaft, and when mounted, the raised portion 1
3a is deformed into a cross-sectional arch shape protruding toward the wearer so that the outer sides in the width direction of the front grooves 19, 19 are arranged in a substantially horizontal direction without being distorted, and the bodily fluid that has migrated to the outer side of the raised portion 13a is dammed. The stop is moved to the rear to prevent leakage from the side edge portion of the sanitary napkin 1 in a favorable manner.

The front grooves 19, 19 have a depth D ₂ (see FIG. 3) of 0.5 to 9 mm, and a ratio D ₂ / T ₂ to a thickness T _{2 of} a portion where no groove is formed is 0. .3-0.
Is preferably 9, more preferably D ₂ is 1 to 6
a mm, D ₂ / T ₂ is 0.5 to 0.9. If the depth of the surface grooves 19, 19 is less than 0.5 mm, it is difficult to obtain flexibility in the groove portion, and it is difficult to obtain a favorable fit, or it is difficult to obtain the effect of blocking the bodily fluid flowing on the surface. Exceeding the range gives the wearer an uncomfortable feeling, which is not preferable.

Hereinafter, preferred groove structures of the grooves 17, 17, the rear groove 18, and the front grooves 19, 19 will be described. still,
Here, a preferred structure of the grooves 17, 17 will be described in detail, but the same applies to the rear groove 18, and the front grooves 19, 19 unless otherwise specified. As shown in FIGS. 6 and 7, the grooves 17, 17 are formed by discontinuously forming a plurality of diamond-shaped small grooves 17a along a predetermined shape from the non-skin contact surface side. And between the small grooves 17a are formed at two levels of depth that are continuously recessed from the surface on the non-skin contact surface side. As described above, by continuously recessing the small grooves 17a between the small grooves 17a from the surface on the skin contact surface side and forming the grooves 17 at two levels of depth, the depth D of the grooves 17, 17 can be increased. It is possible to maintain high flexibility and obtain good fit. The size of the small groove 17a is 1 to 100 m
m ² is preferable. If it is smaller than 1 mm ² , the compression area is too small to obtain a desirable flexibility.
If it exceeds mm ² , favorable flexibility cannot be obtained. Further, the pitch of each small groove 17a is preferably 0.5 to 5 mm. If it is less than 0.5 mm, favorable flexibility and skin contact properties cannot be obtained.
A portion that does not depress between a occurs, so that it bends not only in the width direction but also in the longitudinal direction, and the fit in the longitudinal direction is reduced. In the front groove 19, the effect of preventing leakage is reduced.

The grooves 17, 17, the rear groove 18, the front groove 1
In the case where the grooves 9 and 19 are provided by continuously recessing the small grooves 17a from the surface on the skin contact surface side and forming the small grooves 17a at two levels, the depths of the small grooves 17a are small.
Let it be the depth at a.

The sanitary napkin 1 of the present embodiment is mounted with the central portion thereof being placed between the groins and the adhesive portion 16 being adhered to the undergarment W, similarly to a normal sanitary napkin. The sanitary napkin 1 according to the present embodiment mounted as described above has a lateral force applied to the central portion from the side as shown in FIG.
7 and 17 and bends in the front grooves 19 and 19,
The space between the three has an arch-shaped cross section that is convex toward the skin contact surface side, and is favorably brought into contact with the wearer's crotch. In addition, the rear portion of the sanitary napkin 1 is bent in the rear groove 18 and gently protrudes along the buttocks of the wearer toward the skin contact surface. The shape of the sanitary napkin 1 at the time of mounting is guided and formed by the grooves 17, 17, the rear groove 18, and the front grooves 19, 19, so that the shape is maintained well regardless of the mounting state.

Thus, the sanitary napkin 1 of the present embodiment is
According to this, the raised portions 13a are satisfactorily raised to the skin contact surface side by the grooves 17 and 17 so as to be in a shape suitable for the wearer, so that good fit is exhibited and leakage is prevented. According to the sanitary napkin 1 of the present embodiment, the rear groove 1
8, the rear portion of the sanitary napkin 1 bends toward the skin contact surface side and gently protrudes along the buttocks of the wearer toward the skin contact surface side, thereby exhibiting good fit and preventing leakage. You. According to the sanitary napkin 1 of the present embodiment, the front groove 1
9 and 19, the absorbent body 13 can be easily deformed by using the front grooves 19 and 19 as flexible shafts.
Since the outer sides in the width direction of 9 and 19 are arranged in a substantially horizontal direction without being distorted, good fit is exhibited and leakage is prevented. In addition, since the body fluid that has moved to the outside of the raised portion 13a is moved to the rear of the dam, the leakage from the side edge portion of the sanitary napkin 1 is properly prevented. According to the sanitary napkin 1 of the present embodiment, the back sheets 12a and 12b
Since the grooves are not formed along the grooves 17 and 17 and the rear groove 18 of the absorber 13, the back sheets 12a and 12b are not easily bent and are firmly fixed to the shorts. In addition, there is no possibility that the adhesive portions 16 adhere to each other during the mounting operation or during the mounting and are not distorted. With this, good fit is obtained,
Leaks are well avoided. According to the sanitary napkin 1 of the present embodiment, the absorbent body 13 has a single layer, has a simple structure in which no other member enters, and can be manufactured without using an unnecessarily large amount of material. .

The sanitary napkin 1 of the above embodiment is shown in FIG.
As shown in (a), the basis weight is 300 g / m with a thickness of 7 mm.
The continuous body 13 ′ of the ^second absorber 13 is compressed (heat-compressed if necessary) by an embossing roll or the like, and
a and grooves 17 and 17 and a rear groove 18 are formed (absorbers corresponding to this step are shown in FIGS. 8 (a ′) and 8 (a ″)), and thereafter, the second back sheet 12b is formed. Continuous belt 12
b ′ is covered from the non-skin contact surface side, and as shown in FIG. 8B, the continuous band 11 ′ of the topsheet 11 is covered with the continuous band 11 ′ of the topsheet 11. Surface grooves 19, 19 are formed from the side (the sanitary napkin corresponding to this step is shown in FIGS. 8 (b ′) and 8 (b ″)), and the first groove is formed.
It can be easily manufactured by covering the non-skin contact surface side with the continuous body 12a 'of the back sheet 12a, fixing the peripheral edge, and cutting into a predetermined shape.

The absorbent article of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the raised portions 13a may be rectangular and the grooves 17, 17 and the front grooves 19, 19 may be linear, but in order to fit the crotch more and take an ideal form, the central portion in the longitudinal direction is required. It is preferable to use an arcuate shape that is curved toward the center in the width direction. Groove 1
7, 17, the rear groove 18 and the front grooves 19, 19 are not limited to those continuous from the front end to the rear end as in the above embodiment, but are formed discontinuously at a plurality of locations in the longitudinal direction. It can also be.

Further, all of the grooves 17, 17, the rear groove 18, and the front grooves 19, 19 are not formed by connecting the small grooves 17a as described above, but are formed by continuous groove processing. Can also. Further, when formed by a plurality of discontinuous small grooves 17a divided in the longitudinal direction as in the above embodiment, the shape of the small grooves 17a is not particularly limited. Absorber 13 is formed by embossing an absorber having a uniform thickness to form a raised portion 13a as described above, and also includes a part of absorber 13b 'having a uniform thickness as shown in FIG. The protrusion 13a 'may be formed by stacking the absorbers 13a', or may be formed into a shape having the protrusion 13a from the beginning. When a bulge is formed by overlapping another absorbent body 13a 'on the absorbent body 13b' as shown in FIG. 9, the grooves 17, 17 extending in the longitudinal direction of the absorbent article are shown in FIG. May be formed on the non-skin contact surface side surface of the absorber 13b 'corresponding to the raised portion, but as shown in FIG.
3a 'may be formed on the non-skin contact surface side surface. This aspect is also one embodiment of the present invention. The same effect can be obtained by arranging the second back sheet 12b along the grooves 17, 17 and arranging only the first back sheet 12a in a plane. The absorbent article may be a sanitary napkin, a pad for incontinent persons, a vaginal sheet, or the like.

[0031]

As described above, the absorbent article of the present invention has a simple structure without requiring a large amount of material, has a predetermined shape with excellent fit when attached, and has excellent leakage prevention. It is.

[Brief description of the drawings]

FIG. 1 is a plan view showing a sanitary napkin as one embodiment of an absorbent article of the present invention as viewed from a skin contact surface side.

FIG. 2 is a cross-sectional view of the sanitary napkin taken along line II of FIG.

FIG. 3 is a cross-sectional view of the absorbent body of the sanitary napkin of FIG. 1 taken along the line II.

FIG. 4 is a sectional view of the sanitary napkin of FIG. 1 taken along the line JJ.

5 is an enlarged plan view of the absorbent body of the sanitary napkin of FIG. 1 as viewed from a non-skin contact surface side.

FIG. 6 is a sectional view taken along line KK of the absorbent body of the sanitary napkin of FIG.

FIG. 7 is a view showing a state of wearing the sanitary napkin of FIG. 1;
It is sectional drawing.

8A and 8B are diagrams showing a part of a manufacturing process of the sanitary napkin of FIG. 1, wherein FIG. 8A shows a manufacturing process of an absorbent body, and FIG.

FIG. 9 is a cross-sectional view showing an absorbent body according to another embodiment of the absorbent article of the present invention, and is a view corresponding to FIG.

FIG. 10 is a cross-sectional view showing an absorbent body according to still another embodiment of the absorbent article of the present invention, and is a view corresponding to FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sanitary napkin (absorbent article) 10 Napkin main body 11 Top sheet 12 Back sheet 13 Absorber (absorbing part) 13a Raised part 14 Heat welding part 15 Hot melt agent 16 Adhesive part 17 Groove 18 Rear groove 19 Front groove 20 Wing P Liquid permeable layer I Liquid impermeable layer A Absorber

Continued on the front page (72) Inventor Minoru Nakanishi 2606 Akabane, Kakaicho, Haga-gun, Tochigi Pref.

Claims (4)

[Claims] 1. A liquid permeable layer on a skin contact surface side, a liquid impermeable layer on a non-skin contact surface side, and an absorbing portion interposed between the liquid permeable layer and the liquid impermeable layer. An absorbent article formed substantially vertically elongated, comprising, at a central portion of the absorbent section, a raised section extending in the longitudinal direction of the absorbent article raised to the skin contact surface side, corresponding to the raised section. The non-skin contact surface side of the absorbing portion has a groove extending in the longitudinal direction of the absorbent article, wherein the liquid impermeable layer comprises a liquid impermeable back sheet, and the back sheet is An absorbent article, wherein the absorbent article is arranged in a planar shape and has not been subjected to groove processing along the groove of the absorbing section. 2. The 2.5 g / c of the central part of the absorbing part
^2. The absorbent article according to claim 1, wherein the thickness under m ² load is 3 to 15 mm, and the height of the protrusion is 2 to 10 mm. 3. A bending rigidity in a width direction of a non-skin contact surface side of a portion of the absorbing portion where the groove is not provided in the raised portion is 1 to 10 gf · cm, and the rising of the absorbing portion is The bending stiffness in the width direction toward the non-skin contact surface side in the portion where the groove is provided in the portion is 0.2 to 2 gf · cm, and the groove in the portion where the groove is not provided in the raised portion. 3. The absorbent article according to claim 1, wherein a ratio of a bending stiffness in a width direction to a portion provided with is 1.5 or more. 4. 4. The absorbent article according to claim 1, wherein a plurality of said grooves are provided in said absorbing section.