JP3850102B2 - Absorbent articles - Google Patents

Absorbent articles Download PDF

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Publication number
JP3850102B2
JP3850102B2 JP13808997A JP13808997A JP3850102B2 JP 3850102 B2 JP3850102 B2 JP 3850102B2 JP 13808997 A JP13808997 A JP 13808997A JP 13808997 A JP13808997 A JP 13808997A JP 3850102 B2 JP3850102 B2 JP 3850102B2
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Japan
Prior art keywords
portion
absorbent
groove
contact surface
surface side
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Expired - Fee Related
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JP13808997A
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Japanese (ja)
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JPH10328232A (en
Inventor
稔 中西
美次 濱島
哲哉 草川
泰生 豊島
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花王株式会社
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an absorbent article, such as a sanitary napkin or an incontinence pad, that is worn between human groins and absorbs bodily fluids. The present invention relates to an absorbent article having an excellent predetermined shape and excellent leakage prevention.
[0002]
[Prior art and problems to be solved by the invention]
Generally, an absorptivity provided with a liquid permeable layer on the skin contact surface side, a liquid impermeable layer on the non-skin contact surface side, and an absorbent portion interposed between the liquid permeable layer and the liquid impermeable layer The article is well known. Such absorbent articles are used as sanitary napkins, incontinence pads, panty liners, etc., and it is important to fit well to the wearer and prevent leakage.
[0003]
For this reason, conventionally, various techniques have been proposed in which the absorbent article is formed so that its center in the width direction is high on the skin contact surface side so that the wearer can be fitted well and leakage is avoided.
In the technique described in Japanese Patent Application Laid-Open No. 61-56647, the entire absorbent article is folded so that the central portion in the width direction is a middle height on the skin contact surface side. Moreover, in the technique described in Japanese Patent Publication No. 5-73419, another absorbent article is stacked at the center in the width direction so as to have a middle and high height. Furthermore, in the technique described in Japanese Patent Application Laid-Open No. 8-117277, a synthetic fibrous second absorbent body is integrally provided by embossing at the center in the width direction of the absorbent body having a uniform thickness to obtain a medium-high height. In the technique described in JP-A-8-38550, an absorber having a medium to high thickness is produced and used from wood pulp or synthetic fiber from the stage of forming the absorber.
[0004]
However, in the technique for folding the entire absorbent article as described in JP-A-61-56647, a member such as a back sheet that forms a liquid-impermeable layer is interposed between the absorbent parts. In addition, there is a problem that the ability to absorb body fluid is not excellent and the ability to absorb substantial body fluid is not increased so much that the effect of preventing leakage is insufficient, and a large amount of all the constituent materials are required.
As described in Japanese Patent Publication No. 5-73419, in the technology of stacking absorbent articles in the center in the width direction, liquid-impermeable members such as back sheets between absorbent bodies of the stacked absorbent articles are disposed interveningly Therefore, there is a problem in that the ability to absorb body fluid is not excellent and the ability to absorb substantial body fluid is not increased so much that the effect of preventing leakage is insufficient, and the structure is complicated.
As described in JP-A-8-117277, a technique in which a synthetic fibrous second absorber is integrally provided at the center in the width direction, or as described in JP-A-8-38550, In the technique of manufacturing and using this absorbent body, the absorptivity at the center in the width direction is increased, but the side edge portion is easily twisted, and the fit at the side edge portion may be impaired, leading to leakage.
[0005]
Accordingly, an object of the present invention is to provide an absorbent article that has a simple configuration that does not require a large amount of material, has a predetermined shape that is excellent in fit at the time of wearing, and is excellent in leakage prevention.
[0006]
The present invention comprises a liquid permeable layer on the skin contact surface side, a liquid impermeable layer on the non-skin contact surface side, and an absorbent portion interposed between the liquid permeable layer and the liquid impermeable layer, In the absorbent article formed substantially vertically long,
In the central part of the absorbent part, provided with a raised part extending in the longitudinal direction of the absorbent article raised to the skin contact surface side,
In the absorbing portion, the thickness under the 2.5 g / cm 2 load of the portion where the raised portion is formed is thicker than the thickness under the 2.5 g / cm 2 load of the portion where the raised portion is not formed. And
On the non-skin contact surface side of the absorbent portion corresponding to the raised portion, a groove extending in the longitudinal direction of the absorbent article is provided,
The liquid impervious layer is made of a liquid impervious back sheet, the back sheet is arranged in a planar shape, and is not subjected to groove processing along the groove of the absorbing portion ,
The object is achieved by providing an absorbent article characterized in that a plurality of the grooves are provided in the absorbent section .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, one embodiment of an absorbent article of the present invention will be specifically described with reference to the drawings.
1 is a plan view showing a sanitary napkin as an 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 taken along the line II of the sanitary napkin of FIG. FIG. 3 is a cross-sectional view taken along the line II of the absorbent body of the sanitary napkin of FIG. 1, FIG. 4 is a cross-sectional view of the sanitary napkin of FIG. FIG. 6 is an enlarged plan view of the sanitary napkin absorbent body of FIG. 1 as viewed from the non-skin contact surface side, FIG. 6 is a KK cross-sectional view of the sanitary napkin absorbent body of FIG. It is II sectional drawing which shows the mounting state of this sanitary napkin, and FIG. 8 is a figure which shows a part of manufacturing process of the sanitary napkin of FIG.
[0008]
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 layer I on the non-skin contact surface side. And an absorption part A interposed between the liquid-permeable layer P and the liquid-impermeable layer I, and is formed substantially vertically.
[0009]
More specifically, in the sanitary napkin 1 of the present embodiment, the liquid permeable layer P is formed by a liquid permeable top sheet 11, and the liquid impermeable layer I is a liquid impermeable sheet. The first back sheet 12 a and the second back sheet 12 b are formed, and the absorber A is formed by the absorber 13.
And in the sanitary napkin 1 of this embodiment, as shown in FIG. 2, the surface of the absorber 13 on the non-skin contact surface side, both side surfaces, and both side edges of the surface on the skin contact surface side are second. The first back sheet 12a is covered with the back sheet 12b, and the absorbent body 13 and the second back sheet 12b are disposed in contact with the non-skin contact surface side of the top sheet 11 and the second back sheet. The napkin body 10 is formed between the two. As for this napkin main body 10, both sides edge is heat-welded from the skin contact surface side, and the heat-welding parts 14 and 14 by which the surface sheet 11 and the 2nd back surface sheet 12b were heat-welded to the absorber 13 were carried out. Is formed. The top sheet 11 and the absorbent body 13 are fixed to each other at the side edge portion of the napkin body 10 by heat welding to form heat welded portions 14, 14. The second back sheet 12 b and the absorbent body 13 are formed from the napkin body. 10 side edges are fixed by hot melt agents 15 and 15.
[0010]
The top sheet 11 and the first back sheet 12a are extended outward in the width direction from the left and right side edges of the napkin body 10, and wings 20 and 20 are formed.
The top sheet 11 and the first back sheet 12a are fixed to each other at their peripheral portions.
[0011]
Adhesive is applied or formed on the first back sheet 12a in the longitudinal center of the napkin body 10 to form an adhesive part 16, and the sanitary napkin 1 is put on the underwear through the adhesive part 16 when worn. It is supposed to be fixed to. The adhesive portion 16 is protected by a release paper (not shown).
[0012]
About these structures, it is the same as the conventional sanitary napkin, and as a forming material of the said surface sheet 11, what is conventionally used, such as a nonwoven fabric and an apertured film, can be especially used without a restriction | limiting. As a material for forming the first back sheet 12a and the second back sheet 12b, a material that has been conventionally used, such as a leak-proof film, a polyethylene laminated waterproof paper, and a polyethylene laminated nonwoven fabric, is used without particular limitation. Can do. Furthermore, the heat welding parts 14 and 14 can also be provided using a conventional technique without any particular limitation, and the hot melt agents 15 and 15 that have been conventionally used can be used without any particular limitation. The pressure-sensitive adhesive portion 16 can also be provided using a conventional pressure-sensitive adhesive without particular limitation and without particular limitation.
[0013]
Thus, the sanitary napkin 1 according to the present embodiment has the longitudinal direction of the sanitary napkin 1 raised at the center of the absorbent body 13 toward the skin contact surface as shown in FIGS. 2 and 3. And a pair of grooves 17 and 17 extending in the longitudinal direction of the sanitary napkin 1 are provided on the non-skin contact surface side of the absorbent body 13 corresponding to the raised portion 13a.
[0014]
More specifically, in the sanitary napkin 1 of the present embodiment, the raised portion 13a of the absorbent body 13 is formed from the central portion to the rear portion of the absorbent body 13 as shown in FIG. Is wide and tapered toward the rear. Further, in the central part, the front side and the rear side are the widest and slightly narrowed between them, and the side edges are formed in a convex arc shape inward in the width direction.
In order to obtain an excellent leak-proof property, the width W 1 on the most front side is 20 to 60 mm. The width W 2 of the narrowest part in the central part is preferably 15 to 40 mm.
Further, the arc-shaped side edge of the central portion of the absorbent body 13 of the raised portion 13a preferably has a curvature radius of 30 to 300 mm in order to obtain a good fit to the body fluid leakage portion of the wearer. However, if the width W 2 at the central portion is 15 to 40 mm, it may be rectangular for ease of manufacture.
[0015]
The absorber 13 has a thickness (T 1 shown in FIG. 3) where the raised portion 13a is formed under a load of 2.5 g / cm 2 of 7 mm, and a thickness of a portion where the raised portion 13a is not formed (T 1 shown in FIG. 3). T 2 shown in FIG. 3 is 4 mm, and the height of the raised portion 13a (the difference in thickness between the portion where the raised portion 13a is formed and the portion where the raised portion 13a is not formed is shown in FIG. T 3 ) shown is 3 mm.
The thickness T 1 under a load of 2.5 g / cm 2 of the portion where the raised portion 13a is formed is preferably 3 to 15 mm, and more preferably 5 to 12 mm. If it is less than 3 mm, a favorable fit cannot be obtained in the central part, and if it exceeds 15 mm, the film becomes too thick and uncomfortable.
The thickness T 2 under a load of 2.5 g / cm 2 of the portion where the raised portion 13a of the absorbent body 13 is not formed is preferably 1 to 10 mm, and more preferably 2 to 7 mm. If it is less than 1 mm, the rigidity is too small and the side edge portion is easily twisted, and it is difficult to form and maintain a preferable arch shape when the sanitary napkin 1 is mounted. The thickness of the napkin 1 for use becomes too thick, and the uncomfortable feeling at the time of wearing becomes large.
The height T 3 of the raised portion 13a under a load of 2.5 g / cm 2 is preferably 2 to 10 mm in order to fit well to the body fluid leaking portion of the wearer and obtain excellent leakage prevention properties. More preferably, it is ˜7 mm.
[0016]
As the material constituting the absorbent body 13, conventionally known materials constituting the absorbent body such as fluff pulp, absorbent paper, and superabsorbent polymer can be used without particular limitation. The bending rigidity in the width direction toward the non-skin contact surface side (the bending rigidity such that the cross section in the length direction is held in a straight line) in the portion where the grooves 17 and 17 of the protruding portion 13a are not provided is What is 1-10 gf * cm / 3cm is preferable. If the bending rigidity in the width direction is less than 1 gf · cm / 3 cm, the absorbent body of the raised portion is too soft, and if it exceeds 10 gf / cm / 3 cm, the rigidity is excessively increased, which makes it uncomfortable.
This bending stiffness is a sample (thickness similar to that of the raised portion 13a) having a thickness of 30 mm in the longitudinal direction (longitudinal direction of the sanitary napkin 1) and 70 mm in the width direction (width direction of the sanitary napkin 1). , 17 etc.) is held on a chuck with a spacing of 1 cm by a pure bending tester manufactured by Kato Tech, and the sample is vertical, the curvature K = −2.5 to +2.5 (cm -1 )), the bending moment M was measured by performing a pure bending with a constant velocity curvature of 0.50 (cm -1 ) / sec in the range of the sample length at K = 0.5 to 1.5. The bending stiffness (B) per unit area, which is the inclination of the bending moment (M) -curvature (K) curve per unit, is obtained.
[0017]
As shown in FIG. 1, the pair of grooves 17 and 17 are formed symmetrically in a convex arc shape toward the inner side in the width direction of the sanitary napkin 1 in plan view, and the total length thereof is the raised portion 13a. It is arrange | positioned in the position corresponding to the inner side by the fixed distance of the side edge in the center part. Distance W 3 between the innermost portions in the width direction of the sanitary napkin 1 of the grooves 17, 17 has a 5 to 30 mm.
Moreover, the bending rigidity of the width direction to the non-skin contact surface side of the protruding portion 13a of the absorber 13 in the portion where the grooves 17 and 17 are provided is 0.2 to 2 gf · cm. That is, the bending rigidity of the raised portion 13a where the groove 7 that functions as a flexible shaft is not provided is 1.5 times or more than the bending rigidity of the portion where the groove 17 is provided. It is preferable that the ratio is 2 to 10 times. This is because, when the ratio of the bending rigidity is less than 1.5, positive bending at the flexible shaft portion is lost, and it is difficult to take a desirable mounting form that fits the excretory part during mounting.
The bending rigidity in the portion provided with the groove 7 functioning as a flexible shaft is a bulge whose longitudinal direction (longitudinal direction of the sanitary napkin 1) is 30 mm and whose width direction (width direction of the sanitary napkin 1) is 70 mm. Bending moment per unit length of the sample when a non-skin contact surface side surface of the absorber having the same thickness as the portion 13a is subjected to groove processing similar to the grooves 17 and 17 as a sample The bending stiffness (B) per unit area, which is the slope of the (M) -curvature (K) curve, is obtained.
[0018]
Further, the radius of curvature of the grooves 17 and 17 is preferably 30 to 300 mm, but may be a straight line like the raised portion.
The depth D 1 (see FIG. 3) of the grooves 17 and 17 is 0.5 to 10 mm, and the ratio of the groove depth D 1 to the thickness T 1 of the raised portion (D 1 / T 1 ) is 0.05 to 0.7, the depth D 1 is 1 to 5 mm, and the ratio (D 1 / T 1 ) is more preferably 0.1 to 0.5. When the depth D 1 of the grooves 17 and 17 is less than 0.5 mm and the ratio (D 1 / T 1 ) is less than 0.05, it is difficult to obtain flexibility at the groove portion, and it is difficult to obtain preferable fit. On the contrary, if the depth D 1 exceeds 10 mm and the ratio (D 1 / T 1 ) exceeds 0.7, the groove portion is compressed with a high density and the thickness of the entire raised portion is reduced. It is not preferable.
[0019]
Furthermore, the absorbent body 13 of the sanitary napkin 1 of the present embodiment extends in the longitudinal direction of the sanitary napkin 1 at the center in the width direction on the non-skin contact surface side of the rear part, as shown in FIGS. 1 and 4. A straight rear groove 18 is provided, and this rear groove 18 functions as a flexible shaft at the rear portion of the absorbent portion 13 when the sanitary napkin 1 is attached, and the center in the width direction of the rear portion of the sanitary napkin 1 is reversed. It is easily deformed into a V shape and fits well to the wearer's buttocks.
[0020]
The bending rigidity in the width direction toward the non-skin contact surface side of the absorber 13 in the portion where the rear groove 18 is provided is 0.2 to 2 gf · cm.
This bending rigidity is the non-skin of the absorbent body having the same thickness as the raised portion 13a whose longitudinal direction (longitudinal direction of the sanitary napkin 1) is 30 mm and whose width direction (width direction of the sanitary napkin 1) is 70 mm. Unit area that is the slope of the bending moment (M) -curvature (K) curve per unit length of the sample when the same grooved surface as the rear groove 18 is used as the sample The bending rigidity (B) is determined.
The preferable range of the depth D of the rear groove 18 and the ratio (D / T 1 ) of the depth D to the thickness of the raised portion T 1 is the same as that in the grooves 17 and 17. If the depth D of 18 is less than 0.5 mm and the ratio (D / T 1 ) is less than 0.05, it is difficult to obtain flexibility at the groove portion, and it is difficult to obtain a preferable fit. If the depth D exceeds 10 mm and the ratio (D / T 1 ) exceeds 0.7, the groove portion is compressed with high density, and the thickness of the entire raised portion is reduced, which is not preferable.
[0021]
On the non-skin contact surface side of the absorbent body 13, the second back sheet 12b is arranged in a flat shape, and further, the first back sheet on the non-skin contact surface side of the second back sheet 12b. 12a is arranged in a planar shape.
And both the back surface sheets 12a and 12b are not subjected to groove processing along the grooves 17 and 17 and the rear groove 18 of the absorber 13.
[0022]
Further, the napkin body 10 of the sanitary napkin 1 according to the present embodiment has a pair of front grooves 19 formed symmetrically by embossing the top sheet 11 and the absorber 13 from the skin contact surface side. 19 is provided.
The front grooves 19, 19 are convex 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 13 a and toward the inner side in the width direction of the planar view sanitary napkin 1. It is formed in a circular arc shape, and the absorber 13 is easily deformed with the front grooves 19 and 19 as flexible shafts, and at the time of wearing, the raised portion 13a is deformed into a convex cross-sectional arch shape on the wearer side. Thus, the outer side in the width direction of the front grooves 19, 19 is arranged in a substantially horizontal direction without twisting, and the body fluid that has moved to the outside of the raised portion 13 a is transferred to the back side of the dam, and the side edge of the sanitary napkin 1 It is designed to prevent leakage from the water well.
[0023]
The front grooves 19 and 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 to preferably from 0.9, more preferably D 2 is 1 to 6 mm, D 2 / T 2 is 0.5 to 0.9. If the depth of the front grooves 19 and 19 is less than 0.5 mm, it is difficult to obtain flexibility at the groove portion, and a favorable fit cannot be obtained, or it is difficult to obtain an effect of blocking body fluid flowing on the surface. Exceeding this is not preferable because it causes the wearer to feel uncomfortable.
[0024]
Hereinafter, a preferable groove structure of the grooves 17, 17, the rear groove 18, and the front grooves 19, 19 will be described. Although the preferred structure of the grooves 17 and 17 will be described in detail here, the same applies to the rear groove 18 and the front grooves 19 and 19 unless otherwise specified.
As shown in FIGS. 6 and 7, the grooves 17, 17 are subjected to groove processing for forming a plurality of rhombus-shaped small grooves 17 a discontinuously along the predetermined shape from the non-skin contact surface side. In addition, the small groove 17a is formed to have a two-stage depth that is continuously recessed from the surface on the non-skin contact surface side. In this way, by forming the depth between the small grooves 17a and the small grooves 17a continuously from the surface on the skin contact surface side to a two-stage depth, the depth D of the grooves 17, 17 can be formed deeply. It is possible to maintain a high flexibility and obtain a good fit. The size of the small groove 17a is preferably 1 to 100 mm 2 . If it is less than 1 mm 2 , the compression area is too small to obtain preferable flexibility, and conversely, if it exceeds 100 mm 2 , preferable flexibility cannot be obtained. Moreover, it is preferable that the pitch of each small groove 17a shall be 0.5-5 mm. When the thickness is less than 0.5 mm, preferable flexibility and skin contact property cannot be obtained, and when the thickness exceeds 5 mm, a portion that does not sink between the small grooves 17a is generated and bent not only in the width direction but also in the longitudinal direction. The direction fit is reduced. Further, the leakage preventing effect is reduced in the front groove 19.
[0025]
The grooves 17, 17, the rear groove 18, and the front grooves 19, 19 are formed in such a manner that the space between the small groove 17a and the small groove 17a is continuously recessed from the surface on the skin contact surface side in two steps. If provided, the depth is the depth in the small groove 17a.
[0026]
The sanitary napkin 1 according to the present embodiment is attached by attaching the adhesive portion 16 to the undergarment W with the central portion disposed between the crotch like a normal sanitary napkin.
Then, the sanitary napkin 1 of the present embodiment mounted in this way is bent in the grooves 17 and 17 and the front grooves 19 and 19 as shown in FIG. Thus, the ridges 13 are formed in a cross-section arch shape convex toward the skin contact surface side, so that they are in good contact with the wearer's crotch.
Further, the rear part of the sanitary napkin 1 is bent at the rear groove 18 and gently rises toward the skin contact surface side along the wearer's buttocks.
The shape of the sanitary napkin 1 at the time of wearing is guided and formed by the grooves 17, 17, the rear groove 18, and the front grooves 19, 19, so that the sanitary napkin 1 is well maintained regardless of any wearing state.
[0027]
As described above, according to the sanitary napkin 1 of the present embodiment, the raised portions 13a are well raised on the skin contact surface side by the grooves 17 and 17, and the shape fits well to the wearer. Performance is demonstrated and leakage is prevented.
According to the sanitary napkin 1 of this embodiment, the rear portion of the sanitary napkin 1 is bent toward the skin contact surface side by the rear groove 18 and gently rises toward the skin contact surface side along the wearer's buttocks. Good fit is exhibited and leakage is prevented.
According to the sanitary napkin 1 of the present embodiment, the absorbent body 13 is easily deformed by the front grooves 19, 19 using the front grooves 19, 19 as flexible shafts. Since the outside is arranged in a substantially horizontal direction without twisting, good fit is exhibited and leakage is prevented. Moreover, since the bodily fluid which moved to the outer side of the protruding part 13a is dammed and transferred to the rear side, leakage from the side edge of the sanitary napkin 1 is prevented well.
According to the sanitary napkin 1 of the present embodiment, the back sheets 12a and 12b are arranged in a plane and are not subjected to groove processing along the grooves 17 and 17 and the rear groove 18 of the absorber 13, so that the back sheet 12a and 12b are not easily bent and can be firmly fixed to the shorts, and the adhesive portions 16 are not bonded to each other during the mounting operation or during mounting. As a result, good fit is obtained, and leakage is well avoided.
According to the sanitary napkin 1 of the present embodiment, the absorbent body 13 is a single layer and has a simple structure in which no other member is interposed therebetween, and can be manufactured without using an unnecessarily large amount of material. .
[0028]
As shown in FIG. 8A, the sanitary napkin 1 according to the present embodiment is compressed by an embossing roll or the like on a continuous body 13 ′ of an absorbent body 13 having a thickness of 7 mm and a basis weight of 300 g / m 2 (if necessary). Heat-pressing) to form the raised portion 13a and the grooves 17, 17 and the rear groove 18 (absorbers corresponding to this step are shown in FIG. 8 (a ′) and FIG. 8 (a ″)). Then, the continuous band 12b ′ of the second back sheet 12b is covered from the non-skin contact surface side, and the skin contact surface side is covered with the continuous band 11 ′ of the top sheet 11 as shown in FIG. At the same time, surface grooves 19 and 19 are formed from the continuous belt 11 ′ side of the top sheet 11 (a sanitary napkin corresponding to this step is shown in FIG. 8 (b ′) and FIG. 8 (b ″)). The non-skin contact surface side is covered with a continuous body 12a ′ of one back sheet 12a, and the periphery is fixed and cut into a predetermined shape. It can be easily manufactured.
[0029]
In addition, the absorbent article of this invention is not restrict | limited at all to the above-mentioned form, A various change is possible in the range which does not deviate from the meaning of this invention.
For example, the ridges 13a can be rectangular and the grooves 17, 17 and the front grooves 19, 19 can be straight. However, in order to fit the crotch and take an ideal form, the central part in the longitudinal direction is It is preferable to use an arc shape that is curved toward the center in the width direction.
Further, the grooves 17, 17, the rear groove 18, and the front grooves 19, 19 are not limited to those that are continuous from the front end to the rear end as in the above-described embodiment, and are not continuous at a plurality of locations in the longitudinal direction. It can also be formed.
[0030]
Further, the grooves 17, 17, the rear groove 18, and the front grooves 19, 19 are not connected to the small groove 17a as described above, and can be continuously grooved. Moreover, when formed with the discontinuous several small groove | channel 17a divided | segmented in the longitudinal direction like the above-mentioned embodiment, the shape etc. of the small groove 17a are not specifically limited.
The absorbent body 13 is formed by embossing the absorbent body having a uniform thickness as described above to form a raised portion 13a, as well as a part of the absorbent body 13b 'having a uniform thickness as shown in FIG. It is also possible to form a raised portion by overlapping the absorbent bodies 13a ′, or to form the raised portion 13a from the beginning.
In addition, as shown in FIG. 9, when other absorber 13a 'is piled up on absorber 13b', and the protruding part is formed, the groove | channels 17 and 17 extended in the longitudinal direction of the said absorbent article are shown in the figure. May be formed on the non-skin contact surface side surface of the absorbent body 13b ′ corresponding to the raised portion, as shown in FIG. 10, on the non-skin contact surface side of the absorbent body 13a ′. It may be formed on the surface. This aspect is also an embodiment of the present invention.
Moreover, the same effect can be acquired even if it arrange | positions the 2nd back surface sheet 12b along the groove | channels 17 and 17 and arrange | positions only the 1st back surface sheet 12a in planar shape.
The absorbent article can be a sanitary napkin, an incontinence pad, a cage sheet, or the like.
[0031]
【The invention's effect】
As described above, the absorbent article of the present invention does not require a large amount of material, has a simple configuration, has a predetermined shape with excellent fit when mounted, and has excellent leakage prevention properties.
[Brief description of the drawings]
FIG. 1 is a plan view showing a sanitary napkin as an embodiment of an absorbent article of the present invention as viewed from the skin contact surface side.
2 is a cross-sectional view taken along the line II of the sanitary napkin of FIG.
3 is a cross-sectional view taken along the line II of the absorbent body of the sanitary napkin of FIG. 1. FIG.
4 is a JJ cross-sectional view of the sanitary napkin of FIG.
FIG. 5 is an enlarged plan view of the absorbent body of the sanitary napkin of FIG. 1 as viewed from the non-skin contact surface side.
6 is a cross-sectional view taken along the line KK of the absorbent body of the sanitary napkin of FIG. 1. FIG.
7 is a cross-sectional view taken along the line II showing a state where the sanitary napkin of FIG. 1 is attached.
8 is a view showing a part of the manufacturing process of the sanitary napkin of FIG. 1, (a) showing the manufacturing process of the absorbent body, and (b) showing the covering process of the top sheet.
FIG. 9 is a cross-sectional view showing an absorbent body according to another embodiment of the absorbent article of the present invention, 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]
1 Sanitary napkin (absorbent article)
10 Napkin body 11 Top sheet 12 Back sheet 13 Absorber (absorbing part)
13a Raised portion 14 Heat welded portion 15 Hot melt agent 16 Adhesive portion 17 Groove 18 Rear groove 19 Front groove 20 Wing P Liquid permeable layer I Liquid impermeable layer A Absorbing portion

Claims (4)

  1. A liquid-permeable layer on the skin contact surface side, a liquid-impermeable layer on the non-skin-contact surface side, and an absorbent portion interposed between the liquid-permeable layer and the liquid-impermeable layer, and substantially vertically long In the absorbent article formed in,
    In the central part of the absorbent part, provided with a raised part extending in the longitudinal direction of the absorbent article raised to the skin contact surface side,
    In the absorbing portion, the thickness under the 2.5 g / cm 2 load of the portion where the raised portion is formed is thicker than the thickness under the 2.5 g / cm 2 load of the portion where the raised portion is not formed. And
    On the non-skin contact surface side of the absorbent portion corresponding to the raised portion, a groove extending in the longitudinal direction of the absorbent article is provided,
    The liquid impervious layer is made of a liquid impervious back sheet, the back sheet is arranged in a planar shape, and is not subjected to groove processing along the groove of the absorbing portion ,
    An absorbent article comprising a plurality of the grooves in the absorbent portion .
  2. A thickness at 2.5 g / cm 2 weight under the central portion of the absorbent portion is 3 to 15 mm, and the absorbent article according to claim 1 in which the raised height is characterized in that it is a 2~10mm .
  3.   The bending rigidity in the width direction toward the non-skin contact surface side in the portion of the raised portion of the absorbent portion where the groove is not provided is 1 to 10 gf · cm, and the groove of the raised portion of the absorbent portion The bending rigidity in the width direction toward the non-skin contact surface side in the provided portion is 0.2 to 2 gf · cm, and the groove is provided in the portion of the raised portion where the groove is not provided. The absorbent article according to claim 1 or 2, wherein the ratio of the bending rigidity in the width direction to the portion is 1.5 or more.
  4. The absorptive article according to any one of claims 1 to 3 in which said absorption part consists of one absorber which does not have a folded portion .
JP13808997A 1997-05-28 1997-05-28 Absorbent articles Expired - Fee Related JP3850102B2 (en)

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JP3850102B2 true JP3850102B2 (en) 2006-11-29

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