KR100904473B1 - Elongated absorbent article - Google Patents

Abstract

An elongate absorbent article is disclosed in which a liquid permeation hole 25 and an embossed portion 26 are distributed in a central region 20 comprising a front portion 20A and a back portion 20B. The opening density expressed by (the total of the area occupied by the liquid permeation hole 25 of the front part 20A) / (the area of the front part 20A) is (the liquid permeation hole 25 of the rear part 20B occupies). It is higher than the opening density of the total of the area) / (the area of the rear part 20B), and (total of the area which the embossed part 26 of the rear part 20B occupies) / (the area of the rear part 20B). The emboss density displayed is higher than the emboss density of (the sum of the area occupied by the emboss part 26 of the front part 20A) / (the area of the front part 20A).

Description

Elongated absorbent article {ELONGATED ABSORBENT ARTICLE}

Mark of related application

This application is filed by claiming priority based on Japanese Patent Application No. 2002-354181 filed on December 5, 2002. The disclosure of the Japanese patent application is incorporated as part of the disclosure of the present specification.

Field of technology

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to absorbent articles suitable for absorption of menstrual blood and the like excreted from the female genitalia, and more particularly to an elongate absorbent article covering the wearer's body vagina to the buttocks.

The general structure of an absorbent article that absorbs menstrual blood excreted from the female genitalia is a liquid permeable surface sheet located on the skin side surface, a liquid impermeable back sheet located on the wear side surface, and interposed between the surface sheet and the back sheet. Having a liquid absorbing layer, the back sheet is usually worn on the inner surface of the crotch fabric of the underwear in a state of being adhered through the pressure-sensitive adhesive layer.

In the absorbent article, a function of reliably capturing the acupuncture points given to the skin-side surface is required to prevent transverse leakage of the liquid from the absorbent article and leakage of the back of the liquid.

Particularly in absorbent articles worn by menstruating women at bedtime, menstrual or absorbent articles that try to flow from the anus to the grooves of the buttocks through the wearer's body while preventing the leakage of menstrual blood from the transverse direction of the absorbent article. It is required not to leak out the menstrual blood which is going to flow backward along the skin-side surface of. For that purpose, as described in Japanese Patent Application Laid-Open No. 2001-95842 and Japanese Patent Application Laid-Open No. 2001-129018, the absorbent article used at bedtime is formed longer in the longitudinal direction than the one used during the day, and its skin-side surface In the front of the vaginal canal to cover a wider range from the anus to the posterior buttocks.

In such an elongate absorbent article, a surface sheet in which the liquid permeation holes are uniformly dispersed is often used in a wide range from a portion facing the vaginal opening to a portion facing the anus or the buttocks. For example, a nonwoven fabric formed by uniformly dispersing liquid permeation holes in a wide range or a resin film in which liquid permeation holes are uniformly dispersed is used as the surface sheet.

However, since the frictional strength of the surface of the nonwoven fabric is reduced by forming a plurality of liquid permeation holes, when a large force is applied to the rear portion of the non-woven fabric inserted into the groove of the buttocks due to a change in body posture, such as sleeping, There is a fear that the fibers around the permeation holes are fluffed, or, moreover, that tearing occurs from around the liquid permeation holes.

In addition, when the resin film in which the liquid permeation hole is formed is used, when the resin film is thin and soft, the surface sheet is wrinkled to the surface sheet at the portion that is in close contact with the groove of the anus or buttocks by the above-described posture change. This is easy to occur. Therefore, when using a thin resin film as mentioned above, between a resin film and the layer located underneath, it adhere | attaches with a hot melt adhesive so that a resin film can be restrained in a lower layer. However, the hotmelt adhesive will hinder the penetration of menstrual blood from the surface sheet to the underlying layer.

In other words, in an elongate absorbent article covering the vaginal opening to the groove of the buttocks, it is required to induce the acupuncture points into the liquid absorbing layer quickly in the anterior part that receives a large amount of acupuncture points at once in opposition to the vaginal opening. The rear portion opposite the groove is required to be effective in stopping the small amount of acupuncture points and not leaking out, but in the rapidity of liquid absorption. In the rear portion, durability and joint strength are required to further prevent the occurrence of fluffing and tearing due to compression in the grooves of the buttocks and friction with the buttocks, or to suppress the occurrence of wrinkles. In this way, it is not the best structure to uniformly distribute the liquid permeation hole with respect to the surface sheet covering various portions having different required functions.

This invention is made | formed in view of the said conventional subject. Accordingly, an object of the present invention is to realize the quickness of menstrual blood penetration in the anterior part facing the vaginal opening, and to prevent the leakage of menstrual blood in the posterior part facing the groove of the buttocks, and further increase the surface strength and the bonding strength. It is to provide an absorbent article.

1st aspect of this invention WHEREIN: The liquid permeable surface sheet which has a skin side surface and a wear side surface, and is located in a skin side surface, the back sheet located in a wear side surface, and the said surface sheet and the said back sheet An elongate absorbent article having a liquid absorbing layer positioned therebetween is provided,

Compression grooves in which the liquid absorbing layer is compressed together with the surface sheet are arranged to extend symmetrically with respect to the longitudinal centerline of the absorbent article, and a longitudinally long central region is formed therebetween, wherein the central region forms the front and rear portions. Including,

In the central region, a liquid permeation hole penetrating the surface sheet at least and a dot-shaped emboss portion at least the surface sheet is formed in the nonwoven fabric forming the surface sheet,

Opening density represented by (total area occupied by the liquid permeation hole in the front part) / (area of the front part) is the opening density of (total area occupied by the liquid permeation hole in the rear part) / (area of the rear part) The emboss density which is higher and is expressed as (the total of the area which the emboss part of the rear part occupies) / (the area of the rear part) is the (total of the area which the emboss part of the front part occupies) / (the area of the front part) It is higher than the emboss density.

In the absorbent article according to the first aspect of the present invention, since the surface sheet is formed of a nonwoven fabric, the feeling of contact with the wearer's body is soft. The portion where the liquid permeation hole of the nonwoven fabric is formed passes through the acupuncture points so that the inside of the liquid permeation hole falls to its own weight, and thus the menstrual blood can pass rapidly. On the other hand, in the embossed portion formed in the nonwoven fabric, the fiber density is considerably high, and the menstrual blood can be strongly attracted by the capillary action. That is, although the liquid permeation hole has a weak force to pull menstrual blood, the menstrual blood is rapidly penetrated, and the embossed portion has a slow menstrual blood permeation rate but a strong menstrual blood.

By forming a large number of liquid penetrating holes in the front portion of the central region, the menstrual blood excreted from the vaginal can be transferred to the liquid absorbing layer in a short time. The leakage of the furnace can be prevented.

By arranging a large number of embossed portions in the rear portion, the frictional strength of the surface of the nonwoven fabric in the rear portion can be increased, and when the force from the grooves of the buttocks in the rear portion is given, the occurrence of fluff or tearing can be prevented. have. In addition, the front portion has a small number of embossed portions, so the probability that the embossed portion touches the vaginal ball or the like becomes low, and the stimulation to the vaginal ball or the like in the front part is less, resulting in an excellent fit.

In the absorbent article according to the first aspect of the present invention, the surface sheet includes a heat sealable fiber, and a second layer containing the heat sealable fiber is provided under the surface sheet. A hole is formed from the surface sheet over the second layer such that the surface sheet and the second layer are fused at the inner surface of the liquid permeation hole, and the embossed portion compresses the surface sheet and the second layer together, Furthermore, it can be configured as being fused.

In this case, since the surface sheet and the second layer are joined around the liquid permeation hole, the surface sheet is reinforced with the second layer, and wrinkles are less likely to occur in the surface sheet when subjected to a force from the wearer's body. The tearing can be prevented from occurring in the surface sheet from the portion of. Therefore, it is also possible to make the said liquid permeation hole of the large opening dimension. If the embossed portion in which the surface sheet and the second layer are compressed together in the rear portion is formed, the surface sheet is reinforced with the second layer also in the rear portion. In addition, when the surface sheet and the second layer are compressed together, the circumference of the embossed portion becomes bulky, and it becomes difficult for the embossed portion to give a hard feeling to the wearer's body.

As described above, it is preferable that the basis weight of the second layer is greater than the basis weight of the surface sheet in order to exhibit the reinforcing function and increase in volume.

Moreover, although the said liquid permeation hole is formed in the said front part, the absorbent article in the 1st aspect of this invention can be comprised so that the said embossing part is not formed.

By forming only the liquid permeation hole in the front part, the whole area of the front part becomes soft, and the closeness to the vagina or its periphery becomes soft.

In this case, it is preferable that the average value of the distance between the centers of the emboss portions adjacent to the rear portion is larger than the average value of the distances between the centers of the liquid permeation holes adjacent to the front portion.

By making the opening density of the liquid permeation hole high in the front part, the menstrual blood excreted from the vaginal opening can be quickly transferred from the liquid permeation hole to the liquid absorption layer. Also, since the menstrual blood that is going to the posterior part is less than the menstrual blood given to the anterior part. Even if the emboss density is low, the shift to the rear side can be sufficiently prevented. In addition, by lowering the emboss density in the rear portion, the rear portion can be prevented from becoming too hard, and the feeling of contact with the wearer's body can be softened.

In the second aspect of the present invention, a liquid permeable surface sheet having a skin side surface and a wear side surface and positioned on the skin side surface, a back sheet positioned on the wear side surface, and between the surface sheet and the back sheet. An elongate absorbent article having a liquid absorbing layer positioned at is provided,

Compression grooves in which the liquid absorbing layer is compressed together with the surface sheet are arranged to extend symmetrically with respect to the longitudinal center line of the absorbent article, and a longitudinally long central region is formed therebetween, wherein the central region forms the front portion and the rear portion. Including,

The liquid permeation hole is uniformly distributed in the surface sheet over the whole area of the center region, and the dot-shaped embossed portion in which the surface sheet is compressed is (sum of the area occupied by the embossed portion in the rear portion) / (area of the rear portion). The emboss density represented by) is arranged in the center region so as to be higher than the emboss density of (sum of the area occupied by the emboss portion in the front part) / (area of the front part).

Also in the absorbent article in the second aspect of the present invention, the embossed portion does not irritate the vaginal ball and its surroundings mainly by arranging the embossed portion in the rear portion. In addition, the menstrual blood to be moved backward can be drawn from the dense embossed portion.

In the second aspect of the present invention, the surface sheet is not limited to one formed of a nonwoven fabric, and may be a resin film having a liquid permeation hole formed therein.

In this case, the adhesion between the surface sheet and the underlying layer can be improved by the embossed portion, and wrinkles can be prevented from occurring in the surface sheet due to friction with grooves of the buttocks. In addition, by increasing the density of the lower layer of the surface sheet by the embossing portion, it is possible to exert a function of stopping the menstrual blood which is going to move backward in this high density portion.

It is preferable that the 2nd layer which consists of heat-sealing fiber is provided under the surface sheet of the said resin film, and in the said embossing part, the said surface sheet and the said 2nd layer are compressed and fused together.

Thereby, in the rear part, the surface sheet of a resin film and a 2nd layer can be integrated, without using a hot melt adhesive too much, and the fiber density of a 2nd layer can be raised in an emboss part, and acupuncture point in an emboss part is Can be strongly attracted.

Further, if the absorbent article has a structure in which the emboss portion is not formed in the front portion, the irritation to the wearer's skin can be reduced when the front portion comes in close contact with the vaginal opening and its surroundings.

As described above, the present invention is useful in an elongate absorbent article in which the front part is an area facing the vaginal opening of the wearer, and the rear part is an area opposite the rear part away from the vaginal opening.

The present invention is to be understood in more detail from the following detailed description and the accompanying drawings of preferred embodiments of the present invention, however, these are not intended to limit the present invention, but are merely for explanation and understanding.

In the drawings,

BRIEF DESCRIPTION OF THE DRAWINGS The top view which shows the sanitary napkin of 1st Embodiment of the absorbent article of this invention.

FIG. 2 is a cross-sectional view taken along line II-II (horizontal reference line) showing a state where the sanitary napkin shown in FIG. 1 is mounted on the crotch portion of the underwear. FIG.

3 is an enlarged cross-sectional view showing an opening state of a liquid permeation hole formed in the front portion;

4 is an enlarged cross-sectional view showing a state where an embossed portion is formed in the rear portion;

Fig. 5 is a plan view partially showing a sanitary napkin of a second embodiment and a third embodiment of the present invention.

Fig. 6 is a cross-sectional explanatory view showing a state where a sanitary napkin is attached to a wearer's body.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is described in detail in preferred embodiment based on this invention with reference to attached drawing. In the following description, numerous specific details are set forth in order to fully understand the present invention. However, it will be apparent to those skilled in the art that the present invention can be achieved without these specific details. In addition, in order to avoid that this invention may become meaninglessly obscure, it does not show in detail about a well-known structure.

The absorbent article of the present invention is used as a sanitary napkin whose main purpose is to absorb menstrual blood excreted from the vaginal opening of a woman. The surface facing the wearer's crotch of the two surfaces of the absorbent article is the skin side surface, and the opposite surface is expressed as the wear side surface regardless of whether the wear is worn on the outside thereof.

The term longitudinal centerline as used herein means a line extending in the longitudinal direction by dividing the absorbent article in the transverse direction. On the other hand, the term transverse reference line does not necessarily mean a line extending in the transverse direction by dividing the absorbent article in the longitudinal direction, but in the transverse direction across the center of the longitudinal direction at the portion that is in contact with the vaginal opening during wearing. It means an extended line.

In addition, as shown in the following embodiment, although the liquid permeation hole and the embossing part are formed in the center area | region of an absorbent article, in this specification, the liquid permeation hole per unit area (this area is arbitrary, for example 100 mm <^2> ) is mentioned. The number and the number of embossed portions per unit area are taken as density of liquid permeation holes and density of embossed portions, respectively.

 In addition, although the center area is divided into the front part and the rear part, (the sum of the area occupied by the liquid permeation hole in the front part) / (the area of the front part), the opening density in the front part, and (the liquid permeation in the rear part). The total of the area occupied by the hole) / (the area of the rear part), the opening density in the rear part, (the total of the area occupied by the emboss part of the front part) / (the area of the front part), and the emboss density of the front part. , (Sum of the area occupied by the embossed part of the rear part) / (area of the rear part) are the emboss densities of the rear part.

1 is a plan view showing the sanitary napkin 1 with the skin side surface facing upward as a first embodiment of the absorbent article of the present invention, and FIG. 2 shows a state where the sanitary napkin of FIG. 1 is attached to the crotch fabric of the underwear. Sectional drawing in the II-II line (horizontal reference line) shown, FIG. 3 is an expanded sectional drawing which shows the front part of the sanitary napkin's center area, and FIG. 4 is an enlarged sectional view showing the rear part of the sanitary pad's center area.

The sanitary napkin 1 shown in Fig. 1 is an elongated type suitable for wearing by a woman during menstruation at bedtime and the like, and the total length dimension in the longitudinal direction is almost 200 to 380 mm.

The sanitary napkin 1 has a right edge portion 1a and a left edge portion 1b extending in the longitudinal direction at equidistant distances from the longitudinal center line Oy-Oy, and from the horizontal reference line Ox-Ox. It has the front edge part 1c and the rear edge part 1d of the protrusion curve shape spaced back and forth. The distance from the horizontal reference line Ox-Ox to the rear edge 1d is longer than the distance from the horizontal reference line Ox-Ox to the front edge 1c.

The right edge portion 1a and the left edge portion 1b protrude to both the left and right sides in a predetermined length range in the vertical direction including the horizontal reference line Ox-Ox, and the wing portions 1A and 1A in this protruding portion. Is formed. Further, at the rear of the wing portions 1A and 1A, the right edge portion 1a and the left edge portion 1b are formed in a curved shape so that the opposite intervals in the horizontal direction gradually widen toward the rear side, and the rear portion at the widening portion is rearward. Flaps 1B and 1B are formed.

As shown in the cross-sectional view of FIG. 2, this sanitary napkin 1 has a liquid-impermeable back sheet 2 appearing on the surface of the wearer side and a liquid-permeable surface sheet 3 appearing on the skin-side surface. A liquid absorbing layer 4 is interposed between the back sheet 2 and the surface sheet 3, and a second layer 5 is provided between the surface sheet 3 and the liquid absorbing layer 4. As indicated by the dotted line in FIG. 1, the liquid absorbing layer 4 extends from the inside of the front edge 1c to the inside of the rear edge 1d and further includes the wing portions 1A, 1A and the rear flap ( It is installed in a wide range except 1B and 1B).

The sanitary napkin 1 is provided with a compression groove 10 in which at least the surface sheet 3 and the liquid absorbing layer 4 are locally pressed and heated to appear on the skin side surface. That is, this compression groove 10 is formed by embossing using a heating roller. In the state where the liquid absorbing layer 4 and the surface sheet 3 overlap, the surface of the liquid absorbing layer 4 has a flat roll on the surface, and the surface having the convex portion of the embossed pattern on the surface of the surface sheet 3. The rolls are brought into contact and are formed by pressing and heating.

The compressed groove 10 has a high density compressed portion in which the liquid absorbing layer 4 and the surface sheet 3 are almost compressed into a film shape, and is made of a higher density than an area other than the compressed groove 10 although it is not made into a film shape. It has a medium density compression part. The high density compression section and the medium density compression section alternately form a continuous concave groove in which the skin side surface of the sanitary napkin 1 is recessed toward the back sheet 2 side.

As shown in Fig. 1, the compression groove 10 is divided into compression grooves indicated by reference numerals 11 to 17.

The inner compression grooves 11 and 11 extending in the longitudinal direction are formed symmetrically with respect to the longitudinal center line Oy-Oy. The inner compression grooves 11 and 11 include front curve portions 11A and 11A, inflection portions 11B and 11B and rear inclined portions 11D and 11D. The front curve portions 11A and 11A are arc curves in which the convex side is directed toward the longitudinal center line (Oy-Oy) so that the opposite interval is narrowed at the portion of the horizontal reference line (Ox-Ox). As the front curved portions 11A and 11A extend from the horizontal reference line Ox-Ox toward the rear (in the direction of the rear edge portion 1d), the opposing intervals of the inner compression grooves 11 and 11 gradually widen. All. Then, the inclined portions 11B and 11B are formed with the rear inclined portions 11D and 11D having the widest opposing intervals and gradually decreasing the opposing intervals from the inverted portions 11B and 11B toward the rear. .

In the front ends of the front curved portions 11A and 11A, the left and right inner compression grooves 11 and the inner compression grooves 11 are connected by the front connection compression grooves 12. This forward-connected compression groove 12 has a curved shape with the convex side facing the front edge 1c.

The extended compression grooves 13 and 13 are further extended from the boundary between the front curve portions 11A and 11A and the front connection compression groove 12 toward the front edge portion 1c. These extended compression grooves 13 and 13 are arranged symmetrically with respect to the longitudinal center line Oy-Oy.

At the rear ends of the rear inclined portions 11D and 11D, the inner compression groove 11 and the inner compression groove 11 are connected by the rear connection compression groove 14. The rear connection compression groove 14 has a curved shape with the convex side facing the rear edge 1d.

In this way, the inner compression grooves 11 and 11, the front connection compression grooves 12, the extension compression grooves 13 and 13, and the rear connection compression grooves 14 are all formed continuously. In addition, a predetermined range of the skin-side surface of the sanitary napkin 1 is surrounded by the inner compression grooves 11 and 11, the front connection compression grooves 12, and the rear connection compression grooves 14, and this surrounded range is the center. It is an area 20. The central region 20 is symmetrical with respect to the longitudinal center line (Oy-Oy), and has a longitudinally long shape in which a portion ahead of the horizontal reference line Ox-Ox is shorter than a portion behind the horizontal reference line Ox-Ox. to be.

Front outer compression grooves 15 and 15 are formed on the left and right sides of the front curved portions 11A and 11A of the inner compression grooves 11 and 11. The front outer compression grooves 15 and 15 are formed in a range of a predetermined length before and after the longitudinal direction about the horizontal reference line Ox-Ox. The front outer compression grooves 15 and 15 are curved in shape similar to the front curve portions 11A and 11A.

On the other hand, rear outer compression grooves 16 and 16 are provided on the left and right sides of the rear inclined portions 11D and 11D of the inner compression grooves 11 and 11. The rear outer compression grooves 16 and 16 are inclined so that the gap is gradually narrowed toward the rear edge portion 1d, and the left and right rear outer compression grooves 16 and 16 are connected to the rear connection compression groove 17. It is. The rear outer compression grooves 16 and 16 and the rear connection compression grooves 17 are formed in succession, and the rear connection compression grooves 17 are curved with convex side facing the rear edge portion 1d.

The central region 20 consists of a front portion 20A and a rear portion 20B. The boundary position of the front part 20A and the rear part 20B and the longitudinal length dimension of the front part 20A and the rear part 20B differ by the longitudinal length dimension of the sanitary napkin 1. As shown in FIG. 6, when worn on the female body, the front portion 20A faces the vaginal opening N, and the rear portion 20B does not face the vaginal opening N, but the anus P and the hip It opposes the point containing the groove | channel Q.

In the embodiment shown in FIG. 1, the front part 20A goes from the line which connects the top part of each inflection part 11B, 11B of the inner compression groove 11, 11 to the said front connection compression groove 12. And from the line connecting each vertex of the inflection portions 11B and 11B to the rear connecting compression groove 14 is the rear portion 20B.

As shown in FIG. 1, the second layer 5 is a rectangle installed in the central region 20 and has a long side in the longitudinal direction of the article, and both left and right edges that are long sides of the second layer 5 ( 5a and 5a are located in the longitudinal center line (Oy-Oy) side than the said inner compression grooves 11 and 11, and the 2nd layer 5 does not span the inner compression grooves 11 and 11. One short side of the second layer 5, the leading edge 5b is located on the side slightly closer to the horizontal reference line Ox-Ox than the front connecting compression groove 12, and the second layer 5 is forward It does not span the connection compression section 12. On the other hand, the rear part of the second layer 5 traverses the rear connecting compression groove 14, and the other short side of the second layer 5 is behind the rear connecting compression groove 14. Is also located ahead of the rear coupling compression groove 17.

Moreover, the front part of the 2nd layer 5 may cross the front connection compression groove 12, and the front edge part 5b may be located between the front connection compression groove 12 and the front edge part 1c, The front edge 5b of the second layer 5 extends to the front edge 1c of the sanitary napkin 1, and the rear edge 5c extends to the rear edge 1d of the sanitary napkin 1. You may be.

In the central region 20, a plurality of liquid permeation holes 25 are regularly arranged in the front portion 20A, and a plurality of dot-shaped emboss portions 26 are regularly arranged in the rear portion 20B. It is arranged to be installed. In FIG. 1, the embossing part 26 is shown with the black point for convenience so that the liquid permeation hole 25 and the embossing part 26 may be distinguished easily on drawing. However, the embossed portion 26 is not colored black in the actual product.

The liquid permeation hole 25 is formed in the front portion 20A, but the embossed portion 26 is not formed. That is, in the front part 20A, the emboss part 26 does not exist between the adjacent liquid permeation hole 25 and the liquid permeation hole 25. As shown in FIG. However, as shown in FIG. 1, the liquid permeation hole 25 and the embossed portion 26 do not prevent the mixing of the liquid permeation hole 25 and the embossed portion 26 within a limited area of the boundary between the front portion 20A and the rear portion 20B. .

In this embodiment, although each liquid permeation hole 25 is circular, the liquid permeation hole 25 may be an ellipse form, and each liquid permeation hole 25 may be a short slit.

In this embodiment, only the embossing part 26 is provided in the back part 20B. That is, the liquid permeation hole 25 is not provided in the rear part 20B. However, the liquid permeation hole 25 may be mixed in the embossed part 26 in the said back part 20B. When the liquid permeation hole 25 is formed in the rear part 20B, it is preferable that the number of the liquid permeation holes 25 in the rear part 20B is smaller than the number of the emboss part 26. As shown in FIG. Or the opening density represented by (total of the area which the liquid permeation hole 25 of the rear part 20B occupies) / (the area of the rear part 20B) is (emboss part 26 of the rear part 20B). It is preferable that the emboss density is lower than the sum of the area occupied by () / (the area of the rear part 20B).

In this embodiment, each shape of the dot-shaped emboss part (namely, the emboss part arrange | positioned in a dot pattern) 26 is circular. However, the dot-shaped embossing part 26 used in this specification is not limited to a circular thing as mentioned above, It may be an ellipse shape, a short straight line shape, or another shape.

In addition, the number of embossed portions 26 per predetermined area in the rear portion 20B is greater than the predetermined portion of the front portion 20A and the rear portion 20B permeate the liquid per predetermined area in the front portion 20A. Less than the number of holes 25. That is, the density of the embossed part 26 in the rear part 20B is lower than the density of the liquid permeation hole 25 in the front part 20A.

In addition, the emboss density in the rear part 20B represented by (total of the area which the emboss part 26 of the rear part 20B occupies) / (the area of the rear part 20B) is (front part ( It is lower than the opening density in the front part 20A represented by the sum total of the area which the liquid permeation hole 25 of 20A occupies) / (the area of the front part 20A). In addition, in the embodiment shown in FIG. 1, rather than the average value of the distance between the centers of the adjacent liquid permeation holes 25 in the front part 20A, the adjacent emboss part 26 in the rear part 20B is carried out. The average value of the distance between centers is getting longer. However, the area of each embossed part 26 is formed larger than the area of the individual liquid permeation hole 25.

The opening area of one of the liquid permeation holes 25 is 0.2 to 8 mm ² , and in the case of a circular shape, the diameter is 0.5 to 3.2 mm. The distance between the centers of adjacent liquid permeation holes 25 is 2 to 8 mm. Further, the area of the bottom portion 26a of the embossed portion 26 is 2 to 10 mm ² , and in the case of a circular shape, the diameter is 1.6 to 3.6 mm. In addition, the distance between the centers of adjacent emboss part 26 is 3-10 mm.

In order to introduce the acupuncture points given in the front portion 20A into the liquid absorbing layer 4 quickly and completely, the liquid permeation holes 25 are preferably arranged at the same density at any position of the front portion 20A. As shown in FIG. 1, it is preferable that the said liquid permeation hole 25 is arrange | positioned regularly uniformly. The percentage of pore density in the front portion 20A is 6-20%. In addition, the width dimension of the area | region in which the said liquid permeation hole 25 is formed is 10 mm or more in the horizontal direction orthogonal to a longitudinal center line (Oy-Oy). If it is less than the said range, it is difficult to fully transfer the acupoints excreted from the vaginal opening to the liquid absorption layer 4.

On the other hand, in the rear part 20B, the density of the embossed part 26 may differ from one place to another. For example, the density of the embossed portion 26 may be high at a position close to the rear connection compression groove 14, and the density may be low at a position close to the inflection portions 11B and 11B.

FIG. 3 shows the opening state of the liquid permeation hole 25 of the front portion 20A, and FIG. 4 shows the formation state of the embossed portion 26 of the rear portion 20B.

As shown in FIG. 3, in the front part 20A, the liquid permeation hole 25 penetrates the surface sheet 3, and it reaches | attains the 2nd layer 5, Preferably, the said liquid permeation hole ( 25 is formed through the second layer 5 from the surface sheet 3. Moreover, in the part which deviates from the side edge part 5a, 5a of the 2nd layer 5, the liquid permeation hole 25 is formed only in the said surface sheet 3. As shown in FIG.

As shown in FIG. 4, in the rear portion 20B, the surface sheet 3 and the second layer 5 are compressed to form the embossed portion 26 which becomes concave toward the liquid absorbing layer 4. It is. Moreover, in the part which deviates from the side edge part 5a, 5a of the 2nd layer 5, only the said surface sheet 3 is compressed and the embossed part 26 which becomes concave toward the inside of a sanitary napkin is formed.

The surface sheet 3 includes thermoplastic fibers capable of heat fusion, and the second layer 5 also includes thermoplastic fibers capable of heat fusion. The surface sheet 3 and the second layer 5 here should not be construed as being limited to sheets / layers formed solely of these thermoplastic fibers, but in addition to thermoplastic fibers, include non-heat-adhesive fibers such as natural fibers or regenerated cellulose fibers. It may be.

The liquid permeation hole 25 is formed by a heated needle or pin. That is, the end end 25a is moved downward by inserting the needle or pin from the surface sheet 3 toward the second layer 5 side in the state where the surface sheet 3 and the second layer 5 overlap. The liquid permeation hole 25 of the protruding shape is formed. At this time, the thermoplastic fiber contained in the surface sheet 3 and the thermoplastic fiber contained in the 2nd layer 5 are mutually fused together in the inner surface 25b of the liquid permeation hole 25, and its periphery. As a result, the opening shape of the liquid permeation hole 25 can be maintained, and the periphery of the opening of the liquid permeation hole 25 is reinforced by the second layer 5. In addition, since the surface sheet 3 and the second layer 5 are heat-sealed, there is no need to adhere the surface sheet 3 and the second layer 5 with an adhesive, and the permeation of liquid is inhibited by the adhesive. It doesn't happen.

After the liquid permeation hole 25 is formed, the embossed portion 26 is formed by sandwiching the surface sheet 3 and the second layer 5 between the heated rolls. At this time, the flat roll of the surface touches the surface of the second layer 5, and the embossed roll having the convex portion touches the surface of the surface sheet 3. Accordingly, the thermoplastic fibers included in the surface sheet 3 and the thermoplastic fibers included in the second layer 5 are mutually fused at the inner surface 26b of the embossed portion 26 and at the same time, The fiber density of the surface sheet 3 and the 2nd layer 5 becomes high in an outer peripheral part.

In the bottom portion 26a of the embossed portion 26, the fibers forming the surface sheet 3 and the fibers forming the second layer 5 are compressed to have a high density, and the thermoplastic fibers are melted to form a bottom portion ( 26a) becomes a film form or almost film form.

By fusion of the thermoplastic fibers at the inner surface 26b and the bottom portion 26a, the shape of the embossed portion 26 can be maintained and the surface sheet 3 can be reinforced by the second layer 5. Can be. In particular, as the bottom portion 26a becomes dense, the durability of the surface sheet 3 can be enhanced.

The surface sheet 3 is formed of an air through nonwoven fabric. This air-through nonwoven fabric is a core of polyethylene terephthalate (PET) containing titanium oxide, and is made by joining these fibers by hot air using a deep-sea composite composite fiber having a super-addition polyethylene (PE). The weight is about 15 to 60 g / m ² . In addition, some of the composite synthetic fibers constituting the surface sheet (3) is coated with a hydrophilic emulsion, the rest is coated with a water-repellent emulsion, these are mixed and the mixing ratio of the fiber coated with a water-repellent emulsion is 10 to 30 Mass% is preferred. By uniformly including the fiber coated with the water-repellent emulsion in the surface sheet 3 so as to have a mixing ratio within the above range, it is possible to suppress excessive diffusion of the menstrual blood given to the surface sheet 3 in the surface sheet 3, In the portion 20A, the menstrual blood mainly passes through the liquid penetrating hole 25 and is given to the liquid absorbing layer 4.

However, the surface sheet 3 can penetrate the menstrual blood toward the second layer 5 even in a region other than the liquid permeation hole 25. In order for the surface sheet 3 to exhibit such a liquid permeation function, it is preferable that the density is 0.12 g / cm <^3> or less, and the minimum is about 0.025 g / cm <^3> .

The second layer 5 is formed of an air-through nonwoven fabric made of a sheath-type composite synthetic fiber having an eccentric cross section with a core portion polypropylene (PP) and a super portion polyethylene (PE). In the air through nonwoven of the second layer 5, all the fibers are coated with a hydrophilic emulsion. That is, no fiber coated with a water repellent emulsion is included. In the embodiment shown in FIG. 3 and FIG. 4, the 2nd layer 5 is comprised by stacking the said air through nonwoven fabric in multiple sheets, for example, the thing which folded and folded so that one air through nonwoven fabric overlaps is used. The basis weight of one air through nonwoven fabric is about 15 to 50 g / m ² , and the basis weight of the second layer 5 is about 45 to 150 g / m ² .

By making the basis weight of the second layer 5 larger than the basis weight of the surface sheet 3, the surface sheet 3 can be reinforced with this second layer 5, and excessive wrinkles in the surface sheet 3 Generation | occurrence | production, or tearing from the liquid permeation hole 25 part etc. can be prevented.

For example, the surface sheet 3 is composed of fibers having a fineness of 2.2 dtex, and the second layer 5 is composed of fibers having a fineness of 4.4 dtex, so that the fiber density of the second layer 5 has a surface sheet 3. It is lower than the fiber density of. The fiber density of the second layer 5 is 0.016 to 0.08 g / cm ³ .

In addition, the surface sheet 3 and the 2nd layer 5 may be formed with nonwoven fabrics other than the said air through nonwoven fabric. For example, the surface sheet 3 is made of a spunlace nonwoven made of regenerated cellulose fibers, heat-sealable thermoplastic fibers, and, if necessary, pulp, and the second layer 5 is laminated with pulp and thermoplastic fibers in air, followed by a binder. It is good also as an airlaid nonwoven fabric which joined together and pressurized between heating rolls.

The liquid absorbing layer 4 is a synthetic absorbent polymer such as polyacrylate, polyacrylamide, maleic anhydride, natural starch, cellulose, or the like in aggregates of pulp such as milled pulp, mercerized pulp, and crosslinked pulp. As the absorbent polymer is contained, one in which pulp, the synthetic absorbent polymer and the like are surrounded by hydrophilic tissue paper is used.

The back sheet 2 is a liquid impermeable and breathable sheet, and is a polyethylene (PE) film or a polypropylene (PP) film having fine ventilation holes. For example, by mixing and stretching an inorganic filler such as CaCO ₃ or BaSO ₄ to a plastic sheet, fine vent holes are appropriately dispersed and formed in a film, thereby improving air permeability. The film is about 15-50 micrometers in thickness.

The second layer 5 and the liquid absorbing layer 4 are bonded with a hot melt adhesive partially disposed so as not to interfere with the permeation of the liquid. In addition, the liquid absorbing layer 4 and the back sheet 2 are also adhered with a hot melt adhesive.

In the manufacturing process of the sanitary napkin 1, the surface sheet 3 and the second layer 5 are overlapped as described above, and the liquid permeation hole 25 and the embossed portion 26 are formed so as to be in front of each other. After that, the liquid absorbing layer 4 and the second layer 5 are adhered to form the compressed groove 10. Thereafter, the back sheet 2 is adhered to the surface of the liquid absorbing layer 4.

As shown in FIG. 2, the impermeable sheets 30 and 30 are provided in the left and right both sides of the skin side surface. In the wing portions 1A and 1A and the rear flaps 1B and 1B, the impervious liquid sheets 30 and 30 are bonded to the back sheet 2 with a hot melt adhesive. Two sheets of impervious liquid sheets 30 are folded and folded at a position equidistant from the longitudinal center line (Oy-Oy) at an equidistant distance from each other, and an elastic member 32 extending in the longitudinal direction is bonded thereto. An elastic contraction force acts between the front part and the rear part of the sanitary napkin 1 by the elastic member 32, thereby bending the sanitary napkin 1, and as a result, the impervious sheet 30 at the front and rear intermediate portions of the sanitary napkin 1 , 30 stand up to form leakage preventing walls 31 and 31.

The impervious sheet is formed of a spunbond nonwoven fabric, a meltblown nonwoven fabric, or a composite nonwoven fabric laminated therewith.

The basis weight of the liquid absorbing layer 4 is the largest in the central region 20. A portion fitted in the inner compression grooves 11 and 11 and the front outer compression grooves 15 and 15, a portion fitted in the inner compression grooves 11 and 11 and the rear outer compression grooves 16 and 16, and a rear connecting compression groove ( In each of the portions 14) and the portions fitted in the rear connection compression grooves 17, the basis weight is smaller than the central region 20. The basis weight of the liquid absorbing layer 4 in the portion other than that is equal to or slightly smaller than the portion sandwiched between the inner compression grooves 11 and 11 and the front outer compression grooves 15 and 15.

The preferred basis weight of the liquid absorbent layer 4 in the central region 20, is 400~1200 g / m ^2, and more preferably, 500~1000g / m ^2. A portion fitted in the inner compression grooves 11 and 11 and a front outer compression groove 15 and 15, a portion fitted in the inner compression grooves 11 and 11 and a rear outer compression groove 16 and 16, and a rear connection compression groove. The preferred basis weight of each of the portions sandwiched between the 14 and the rear connection compression groove 17 is 300 to 900 g / m ² , more preferably 350 to 600 g / m ² . In addition, the preferable basis weight of the liquid absorbing layer 4 of other parts is 300-700 g / m <^2> .

As a result, as shown in FIG. 2, the thickness becomes large in the center region 20, and the skin-side surface becomes largely expanded toward the wearer's body in the center region 20. As shown in FIG.

The longitudinal dimension of the center region 20, that is, the longitudinal gap between the front linkage compression groove 12 and the rear linkage compression groove 14 is about 120 to 300 mm. The width dimension of the central region 20 on the horizontal reference line Ox-Ox shown in FIG. 2, that is, the width dimension W1 of the narrowest portion in the front portion 20A is determined according to the female genital width. . Since the average width of the crotch of a woman is about 30 mm, the width dimension W1 is preferably in the range of 15 to 50 mm, more preferably in the range of 20 to 40 mm. In addition, the distance in the horizontal direction between the bent portions 11B and 11B of the inner compression grooves 11 and 11 is about 10 to 40 mm wider than the width dimension W1. Further, the width dimension between the side edge portions 5a and 5a of the second layer 5 is 1 to 10 mm shorter than the width dimension W1.

The rear portion 20B of the central region 20 is sized to easily fit into the grooves Q of the buttocks of the woman's buttocks, shown in FIG. The length dimension up to) is about 60 to 150 mm.

When attaching the sanitary napkin 1 to the wearer's body, the pressure-sensitive adhesive provided on the outer surface of the back sheet 2 is adhered to the inner surface of the crotch cloth 41 shown in FIG. Also adhere to the inner surface of the underwear. In addition, the wing portions 1A and lA are wound around both edges of the crotch fabric 41, bent toward the outer surface of the underwear, and a pressure-sensitive adhesive provided on the wearing side surface of the wing portions 1A and 1A is applied to the outer surface of the crotch fabric 41. Glue.

As shown in FIG. 6, when this underwear is worn with the sanitary napkin 1 attached to the crotch cloth 41, the female crotch is formed by the skin side surface of the sanitary napkin 1 from the jig M. Covered over the groove Q rear.

As shown in FIG. 2, the central region 20 fitted into the inner compression grooves 11 and 11 is inflated toward the wearer's body and is larger in volume than the other portions. Therefore, the front portion 20A of the bulky central region 20 tends to be in close contact with the vaginal opening N, and preferably, the portion where the transverse reference line Ox-Ox traverses is closely in contact with the central part of the vaginal opening N. do. In addition, the wide portion fitted in the inflection portions 11B and 11B of the inner compression grooves 11 and 11 mainly touches the perineal portion O, and the rear portion 20B of the central region 20 is the anus P. From the buttocks (Q).

The surface sheet 3 located on the skin-side surface of the central region 20 is a low density air through nonwoven fabric, and a second layer 5 of a bulky air through nonwoven fabric is provided thereunder. Therefore, the contact feeling which the center area | region 20 gives to each said part of a wearer's body is soft. In particular, since the embossed portion 26 does not exist in the front portion 20A, the embossed portion does not touch the vaginal ball and its surroundings, and does not give a stimulus. In addition, since the embossed portion 26 located in the rear portion 20B is deeply recessed into the second layer 5, the bottom portion 26a of the embossed portion 26 in the rear portion 20B. The high density part becomes hard to directly touch the wearer's body. Therefore, the possibility that the embossing part 26 irritates in the perineal part O, the anus P, and the groove | channel Q of the buttocks also becomes low.

Acupuncture points excreted from the vaginal opening N are mainly given in the anterior portion 20A of the central region 20. Since the surface sheet 3 is a low density nonwoven fabric, menstrual blood penetrates into the surface sheet 3, but since the surface sheet 3 contains fibers coated with a water-repellent emulsion, the spread of the menstrual blood in the surface sheet 3 is diffused. Is suppressed. Acupuncture points given to the surface sheet 3 migrate to the second layer 5 which is in close contact with the surface sheet 3, but since the second layer 5 has air gaps therein, it is acupuncture point. The silver passes through the voids of the second layer 5 by gravity and is attracted to the liquid absorbing layer 4 positioned below it. However, most of the menstrual blood given to the front portion 20A passes quickly through the liquid permeation hole 25 and is attracted to the liquid absorbing layer 4 which is in close contact with the bottom of the second layer 5.

In this way, the menstrual blood excreted from the vaginal opening N is rapidly absorbed by the liquid absorbing layer 4 in the front portion 20A. However, in the posture at bedtime, there is acupuncture points that are intended to flow toward the anus P and the buttocks Q of the buttocks beyond the perineal part O of the body. In addition, when a large amount of acupuncture points are given to the front portion 20A at one time, a portion thereof may shift to the rear portion 20B via the surface of the surface sheet 3.

The menstrual blood that has migrated to the rear portion 20B is attracted by a strong force by the capillary action of the high density portion around the emboss portion 26, but this high density portion is transferred from the surface sheet 3 to the second layer 5. Since it is formed over, the acupuncture points reach the 2nd layer 5 from the surface sheet 3 through the high density part, and are attracted and hold | maintained under the high hydrophilic liquid absorption layer 4 below. Although the liquid permeation hole 25 is not formed in the rear part 20B, since the amount of acupuncture points which reach this rear part 20B is sufficiently less than the acupuncture points given to the front part 20A, it is scattered in the rear part 20B. The embossing part 26 can fully capture the menstrual blood to flow backward. Therefore, leakage of the menstrual blood to the rear can be prevented.

Here, the rear part 20B is brought into close contact from the anus P to the groove Q of the buttocks, and the compressive force from the side acts repeatedly on the rear part 20B according to the movement of the buttocks. In addition, a large change in body posture, such as body lag at bedtime, causes pressure to act on the rear portion 20B and also changes the pressure. However, by providing the embossed portion 26, the durability of the surface sheet 3 is increased in the rear portion 20B, and the surface sheet 3 is reinforced with the second layer 5. Therefore, the anxiety that large wrinkles arise in the rear part 20B, or the surface is fluffed or torn can be eliminated.

Fig. 5 is a partial plan view illustrating a sanitary napkin of another embodiment of the present invention.

In FIG. 5, only the portion including the compression grooves 11 to 17 and the central region 20 and the second layer 5 is shown. Since other parts are the same as the sanitary napkin 1 of the first embodiment shown in FIG. 1, the illustration is omitted. In addition, the shape and structure of the compression grooves 11-17 shown in FIG. 5 are also the same as that of 1st Embodiment shown in FIG.

As shown in FIG. 5 (as also described in the embodiment of FIG. 1), a central region surrounded by the inner compression grooves 11 and 11, the front connection compression grooves 12, and the rear connection compression grooves 14 is shown. 20 is the front part 20A ahead of it by the inflection parts 11B and 11B, and is the back part 20B behind it by the said inflection parts 11B and 11B as a starting point. In addition, in this embodiment, the front part 20A has three areas, namely, the first front part 20A1 and the second front part 20A2 and the first that are forward than the first front part 20A1. Has a third front portion 20A3 that is rearward of the front portion 20A1 of the first front portion 20A1, wherein the boundary between the first front portion 20A1 and the second front portion 20A2 and the first front portion 20A1 The boundary between the third front portion 20A3 and the third front portion 20A3 is equidistantly spaced in the longitudinal direction from the horizontal reference line Ox-Ox.

In this sanitary napkin, the first front portion 20A1 faces the vaginal opening N, and the third front portion 20A3 faces rearward from the vaginal opening N. In this specification, since the part of the center area | region 20 located behind the part which opposes the vaginal opening can be defined as the rear part of the center area | region 20, in the embodiment shown in FIG. It is also possible to include in the rear portion 20B. In the embodiment of Fig. 5, however, the part of 20A3 is distinguished from the rear part 20B and is referred to as a third front part as described above.

In FIG. 5, the embossed part 26 is shown by the white dot in the center area | region 20. As shown in FIG. However, illustration of the liquid permeation hole is omitted.

The individual emboss portions 26 are all formed with the same area, but the density thereof, that is, the number of emboss portions 26 per unit area is low in the first front portion 20A1 touching the vaginal opening, and the rear portion ( 20B) and 2nd front part 20A2 and 3rd front part 20A3.

In addition, (the total of the area occupied by the emboss portion 26 of the first front portion 20A1) / (the area of the first front portion 20A1), the emboss density A1, (the second front The sum of the area occupied by the emboss portion 26 of the portion 20A2) / (the area of the second front portion 20A2) is set to the emboss density A2, and the emboss of the third front portion 20A3. The sum of the area occupied by the part 26) / (the area of the third front part 20A3) is set to the emboss density A3, and (of the area occupied by the emboss part 26 of the rear part 20B). When the total) / (area of rear portion 20B) is emboss density B, the emboss density A1 is lower than any of the emboss densities A2 and A3 and the emboss density B. FIG. In this embodiment, the emboss density A2, the emboss density A3, and the emboss density B are substantially the same. Emboss density A1 is 1/5 or less of emboss density A2 and A3 and emboss density B, More preferably, it is 1/10 or less.

Therefore, the emboss density expressed by (sum of the area occupied by the emboss portion 26 of the front portion 20A) / (area of the front portion 20A) is (emboss portion 26 of the rear portion 20B). ) Is lower than the emboss density represented by the sum of the area occupied) / (the area of the rear part 20B), and the former emboss density is 1/5 or less of the latter emboss density, more preferably 1 / 10 or less.

In addition, in the embodiment shown in FIG. 5, the short compression grooves 18 and 18 are located inside the rear inclined portions 11D and 11D behind the inflection portions 11B and 11B of the inner compression grooves 11 and 11. ) Is formed. Similar to the respective compression grooves 11 to 17, the short compression grooves 18 and 18 compress the surface sheet 3 and the liquid absorbing layer 4 so that a high density compression portion and a medium density compression portion are alternately formed.

  As described above, the short compression portions 18 and 18 exist in the rear portion 20B in addition to the dot-shaped embossed portion 26. However, in the definition of the emboss density of the dot-shaped embossed portion 26, The area of the short compression portion is not included in the total of the areas occupied by the embossed portion 26.

As a sanitary napkin having the arrangement pattern of the embossed portion 26 shown in FIG. 5, the second embodiment and the third embodiment described below can be configured.

In the second embodiment, the surface sheet 3 covering the central region 20 is formed of the same nonwoven fabric as in the first embodiment shown in FIG. 1, and the surface is similar to that shown in FIG. 3. The liquid permeation hole 25 which penetrates the sheet | seat 3 and the 2nd layer 5 is formed. This liquid permeation hole 25 may be distributed in the whole area | region of 20 A of front parts, as shown in FIG. 1, and may be distributed uniformly in the 1st front part 20A1 and the 2nd front part 20A2. In the second embodiment, the liquid permeation hole 25 may be formed in the rear portion 20B.

However, the hole opening density expressed by (sum of the opening area of the liquid permeation hole 25 of the front part 20A) / (the area of the front part 20A) is (liquid permeation hole 25 of the rear part 20B). It is higher than the opening density of the total of the opening area of ()) / (the area of rear part 20B). Moreover, the emboss density expressed by (total of the area which the said emboss part 26 of the rear part 20B occupies) / (the area of the rear part 20B) is (the said emboss of 20 A of front parts) It is higher than the emboss density of the sum total of the area which the part 26 occupies) / (the area of 20 A of front parts).

This is the same also when defining the range of 20A1 and the range of 20A2 as the front part in FIG. 5, and the range of 20A3 and the range of 20B as the rear part.

Thus, since there are many liquid permeation holes 25 in the front part 20A, the menstrual blood passes the liquid permeation hole 25 by itself in the first front part 20A1 of the front part 20A. Can be quickly transferred to the liquid absorbing layer 4. In addition, since there are few emboss parts 26 in the front part 20A1 of the front part 20A, the probability that the emboss part 26 touches the vaginal ball becomes low.

On the other hand, since there are many emboss portions 26 in the rear portion 20B, the surface located in the rear portion 20B when the rear portion 20B enters the groove of the buttocks and receives pressure or frictional force from the wearer's body. It is possible to prevent generation of fluff and breakage from the liquid permeation hole 25 in the sheet 3.

In addition, as shown in FIG. 5, the number of the emboss portions 26 is small, and the second front portion (front and rear of the first front portion 20A1 where the liquid permeation hole 25 predominantly exists) ( Since the density of the embossed part 26 is increasing in 20A2 and the 3rd front part 20A3, the surface sheet | seat is reinforced before and after the 1st front part 20A1, and the 1st front part ( In 20A1), it is possible to prevent excessive wrinkles or the like from occurring in the surface sheet, or from breaking due to the liquid permeation hole 25.

In the third embodiment of the present invention, the surface sheet covering the central region 20 shown in FIG. 5 is formed of a resin film having a liquid permeation hole.

The resin film is, for example, a white polyethylene film containing titanium oxide and has a thickness of about 15 to 50 µm. A plurality of liquid permeation holes can be formed by supplying a softened resin film to the drum surface having a plurality of openings and sucking air from the inside of the drum. The individual liquid permeation holes are circular, elliptical. Alternatively, the resin film may be a network structure, and the mesh portion may function as a liquid permeation hole. The average pore size of each liquid permeation hole is 0.2 to 2 mm, and the pore density of the liquid permeation hole is preferably 10 to 30%.

In Fig. 5, in the case where the resin film having a plurality of liquid permeation holes is used as the surface sheet 3 to cover the central area 20 (and other areas), the liquid permeation holes in the whole area of the central area 20. This is uniformly distributed and installed.

In this case, in the emboss part 26 shown in FIG. 5, the said resin film and the 2nd layer located under it are heated and pressurized together, and the emboss part 26 makes the surface sheet 3 of the resin film. And the second layer 5 are integrated. Moreover, the fiber density of the 2nd layer 5 in the embossing part 26 is increasing.

Also in this third embodiment, in the front portion 20A, the menstrual blood passes through the liquid permeation hole formed in the resin film, passes through the fibers of the second layer 5 at its own weight, and quickly enters the liquid absorbing layer 4. Can be implemented. In addition, since there are few emboss parts 26 in the front part 20A1 of the front part 20A, the probability that the emboss part 26 touches the vaginal ball becomes low.

Also in the rear part 20B, although acupuncture points can quickly transfer to the liquid absorption layer 4 through the liquid permeation hole formed in the surface sheet 3, in the embossed part 26 which exists in large numbers with this, Acupuncture points are attracted by strong force to the high fiber density part of the second layer 5. In addition, since the surface sheet 3 and the 2nd layer 5 are bonded by the embossing part 26 which exists in the back part 20B, the back part 20B which entered the groove of the buttocks is worn by the wearer. When a pressure or a frictional force is received from the body, the excessive wrinkles can be prevented from occurring in the surface sheet 3 formed of the resin film.

In addition, although the surface sheet 3 and the 2nd layer 5 of the resin film are adhere | attached with a hot melt adhesive, the adhesiveness is improved, but in the embossing part 26, the surface sheet 3 and the 2nd layer 5 are Since it is joined, the coating amount of the said hot melt adhesive can be reduced, and therefore there is little possibility that the permeation | transmission of the liquid from the surface sheet 3 to the 2nd layer 5 will be inhibited by a hot melt adhesive. Lose.

While the invention has been shown and described with respect to its embodiments, it will be apparent to those skilled in the art that the foregoing and other various modifications, omissions, and additions can be made without departing from the spirit and scope of the invention. For example, the front coupling compression groove 12 and the rear coupling compression groove 14 may not be provided, and the left and right inner compression grooves 11 and 11 may be independent of each other. Accordingly, the invention should not be construed as limited to the specific embodiments set forth herein, but with respect to the features set forth in the appended claims, all possible implementations may be embodied within the scope and equivalents of the enclosed and equivalents. It is to include the form of.

As described above, in the present invention, the menstrual blood can be reliably captured by the longitudinally long central region sandwiched by the compression groove, and the migration of the menstrual blood to the rear can be effectively prevented. In addition, the durability of the surface sheet in the center area can be improved, and anxiety caused by excessive wrinkles or tearing can be eliminated by the force received from the wearer's body.

Claims (10)

A liquid permeable surface sheet (3) located on the skin side surface having a skin side surface and a wear side surface, a back sheet (2) located on a wear side surface, and the surface sheet (3) and the back sheet (2) In the elongate absorbent article provided with the liquid absorbing layer 4 located in between, A compression groove 11 in which the liquid absorbing layer 4 is compressed together with the surface sheet 3 is disposed so as to extend symmetrically with respect to the longitudinal center line Oy-Oy of the absorbent article, and a longitudinally long central region therebetween. 20 is formed, the central region 20 includes a front portion 20A and a rear portion 20B, In the central region 20, a liquid permeation hole 25 penetrating at least the surface sheet 3 and at least the surface sheet 3 are compressed to a nonwoven fabric forming the surface sheet 3 from the skin side surface. The dot-shaped embossing part 26 which becomes concave toward the liquid absorption layer 4 is formed, The opening density expressed by (the total of the area occupied by the liquid permeation hole 25 of the front part 20A) / (the area of the front part 20A) is equal to (the liquid permeation hole 25 of the rear part 20B is It is higher than the opening density of (the total of the area to occupy) / (the area of the rear part 20B), and (the total of the area which the embossing part 26 of the rear part 20B occupies) / (the area of the rear part 20B) The elongate absorbent article whose emboss density represented by is higher than the emboss density of (total area occupied by the emboss portion 26 of the front portion 20A) / (area of the front portion 20A). . 2. The surface sheet (3) according to claim 1, wherein the surface sheet (3) comprises heat sealable fibers, and a second layer (5) containing heat sealable fibers is provided below the surface sheet (3). The through hole 25 is formed from the surface sheet 3 to the second layer 5, and the surface sheet 3 and the second layer 5 at the inner surface 25b of the liquid permeation hole 25. And the surface sheet (3) and the second layer (5) are compressed together and fused together in the embossed portion (26). The elongate absorbent article according to claim 2, wherein the basis weight of the second layer (5) is greater than the basis weight of the surface sheet (3). The elongated absorbent article as set forth in claim 1, wherein said liquid permeation hole (25) is formed in said front portion (20A), but said emboss portion (26) is not formed. The distance between the centers of the liquid permeation holes 25 adjacent to the front portion 20A is an average value of the distances between the centers of the embossed portions 26 adjacent to the rear portion 20B. An elongate absorbent article, which is greater than the mean of. A liquid permeable surface sheet 3 located on the skin side surface, a back sheet 2 located on the wear side surface, and the surface sheet 3 and the back sheet 2 having a skin side surface and a wear side surface. In the elongate absorbent article provided with the liquid absorbing layer 4 positioned between A compression groove 11 in which the liquid absorbing layer 4 is compressed together with the surface sheet 3 is disposed so as to extend symmetrically with respect to the longitudinal center line Oy-Oy of the absorbent article, and a longitudinally long central region therebetween. 20 is formed, the central region 20 includes a front portion 20A and a rear portion 20B, The liquid permeation hole 25 is uniformly distributed in the surface sheet 3 over the whole of the central region 20, and the surface sheet 3 is compressed to concave toward the liquid absorbing layer 4 from the skin side surface. The embossed part 26 of the dot type | mold to become becomes the emboss density represented by (total of the area which the emboss part 26 of the rear part 20B occupies) / (the area of the rear part 20B), It is an elongate type disposed in the central region 20 so as to be higher than the emboss density of (the sum of the area occupied by the emboss portion 26 of the front portion 20A) / (the area of the front portion 20A). Absorbent articles. The elongate absorbent article as set forth in claim 6, wherein said surface sheet (3) is a resin film having a liquid permeation hole (25) formed therein. 8. The second layer (5) of heat-sealable fibers is provided under the surface sheet (3), and the embossed portion (26) is provided with the surface sheet (3) and the agent. An elongate absorbent article wherein the two layers (5) are compressed and fused together. 7. An elongate absorbent article as set forth in claim 6, wherein said emboss portion (26) is not formed in said front portion (20A). The elongated absorbent according to claim 1 or 6, wherein the front portion 20A is an area facing the wearer's vaginal opening, and the rear part 20B is an area opposite the rear part away from the vaginal opening. article.

Images