TW200423909A - Longitudinal absorbent article - Google Patents

Abstract

The object of the present invention is to enhance liquid absorbing capacity of a central area of an absorbent article in order to prevent the backward leakage of vaginal discharge, and to maintain the high durability of the surface sheet. The solution of the present invention is that a longitudinal central region 20 is formed between internal compressed grooves 11 and 11 on the skin side surface of a sanitary napkin 1. A front part 20A of the central region 20 only forms liquid permeation holes 25, while a rear part 20B forms only embossment 26. Vaginal discharge received by the front part 20A is promptly absorbed into liquid absorption layers via the liquid permeation holes 25, and vaginal discharge flowing to the rear part 20B is prevented from backward transferring by density differences in the embossed parts 26. Since no liquid permeation holes are formed at the rear part 20B, the durability of the surface sheet is enhanced.

Description

200423909 ⑴ 玖, Description of the invention [Technical field to which the invention belongs] The present invention relates to an absorbent article suitable for absorbing menstrual blood and the like discharged from a female sexual organ, and more particularly to an elongated absorbent article covering from the mouth to the buttocks . [Prior art] The general structure of an absorbent article that absorbs menstrual blood discharged from a female device is a liquid-permeable surface sheet on the skin-side surface, a liquid-impermeable back sheet on the clothing-side surface, and a clip. The person who absorbs the liquid-absorbing layer between the surface sheet and the back sheet is usually sandwiched between the pressure-sensitive adhesive layer on the inner surface of the undercloth of the panties and then worn under the state of the back sheet. In the above-mentioned absorbent article, it is required to have a function of accurately capturing menstrual blood received on the side surface of the skin, and preventing the liquid from leaking to the side of the absorbent article or leaking from the rear portion of the liquid to the outside. In particular, absorbent articles worn by women during their physiological period during bedtime require the prevention of menstrual blood leaking from the lateral direction of the absorbent article, as well as the menstrual blood that will flow from the anus toward the gluteal groove along the body, or along the absorbent article. The menstrual blood flowing on the side of the skin will flow backwards so that it will not leak out. Therefore, as described in the following Japanese Patent Literature 1 and Japanese Patent Literature 2, the absorbent article used at bedtime is formed longer than usual in the user's longitudinal direction, so that the skin side surface can be easily removed from the skin. The shame in front of the mouth covers a wider area than the hips behind the anus. The absorbent article used at bedtime is usually formed when the user is longer than the lengthwise direction of -5- (2) (2) 200423909, before the skin side surface is sipped, before the above-mentioned lengthwise absorbent article, In the wide range from the part facing the mouth to the part facing the anus or gluteal groove, there are many surface sheets with uniformly dispersed liquid-permeable holes. For example, in the above-mentioned wide range, a non-woven fabric formed by uniformly dispersing liquid-pervious pores or a resin film uniformly dispersing liquid-pervious pores is used. However, the above-mentioned non-woven fabric has a large number of liquid-permeable holes, which reduces the frictional strength of the surface. When it is sandwiched behind the gluteal groove due to changes in body posture such as turning over, if a large force is generated The fibers around the liquid-permeable holes will fluff, and there will be doubts about the damage around the liquid-permeable holes. When the resin film having liquid-permeation holes is used, if the resin film is thin and soft, creases are likely to occur on the surface sheet closely adhering to the anus or gluteal groove by the above-mentioned posture change. Therefore, if a thin resin film is used as described above, the resin film and the layer below it are bonded together with a hot-melt adhesive to bind the resin film by the layer below it. However, the above-mentioned hot-melt adhesive prevents the penetration of menstrual blood from the surface sheet toward the layer underneath it. That is to say, in the longitudinally-absorbent article covering from the mouth to the gluteal sulcus, since the part facing the mouth is to receive a large amount of menstrual blood in a short time, the part in front of the mouth facing the mouth is covered by It is required that the menstrual blood must be quickly introduced into the liquid-absorbent layer. On the other hand, the part facing the back of the anus or gluteal groove is not required for the speed of liquid absorption, but can be used to retain a small amount of menstrual blood without leaking to the outside. 'And to prevent the hair in the gluteal groove or the friction of the buttocks from fluffing or damage, or to prevent the occurrence of wrinkles, or the durability--6-(3) 200423909 combined strength. In this way, for the parts with different required functions, the same surface sheet with liquid permeation holes uniformly used is not the best structure. In order to solve the above-mentioned conventional problems, the present invention aims to provide a rapid part of menstrual blood through the front part facing the mouth, and a function of suppressing the leakage of menstrual blood in the back part facing the gluteal groove. Absorbent articles that can improve local surface strength or joint strength. [Japanese Patent Document 1]

Japanese Patent Laid-Open No. 2 00 1 -9 5 8 42 [Japanese Patent Document 2] Japanese Patent Laid-Open No. 200 1 290 1 8 [Summary of the Invention] [Technical means for solving problems]

The first invention of the present invention is directed to a longitudinal length including a liquid-permeable surface sheet on the skin-side surface, a back sheet on the garment-side surface, and a liquid-absorbing layer between the top sheet and the back sheet. The absorbent article is characterized in that: at a position spaced from the center line in the longitudinal direction toward the left and right sides, a pair of compression grooves extending in the longitudinal direction and formed from the surface sheet to the liquid absorbing layer are formed, A longitudinally-shaped central region sandwiched by the compression groove is formed. The central region is divided into a front portion and a rear portion. A surface sheet formed of a non-woven fabric is formed in the central region, and a central sheet is formed in the central region. Most of the liquid-pervious holes penetrating the surface sheet at least, and most of the point-shaped embossed portions (4) (4) 200423909 where at least the surface sheet is pressurized are (the total area of the liquid-pervious holes of the front part) / (Area of the front part) The obtained opening density is higher than (the sum of the area occupied by the liquid-permeable holes in the rear part) / (area of the rear part). (Sum of the area occupied by the embossed portion in the rear portion) / (Area of the rear portion) The embossed density obtained is greater than (Sum of the area occupied by the embossed portion in the front portion) / (Area of the front portion) Flower density is still high. This absorbent article is made of a non-woven sheet on the surface, so that it feels soft to the body. In the part where the liquid-permeable holes of the non-woven fabric are formed, menstrual blood can pass quickly because the menstrual blood will fall through the liquid-permeable holes by its own weight. On the other hand, in the embossed portion formed on the non-woven fabric, the fiber density is high, and menstrual blood can be strongly introduced by capillary action. That is, although the force of the menstrual blood to attract menstrual blood is weak, the menstrual blood passes quickly, so the speed of menstrual blood passing through the part where the embossing part is formed is slow but the force of attracting menstrual blood is strong. By forming a majority in front of the central area The liquid perforation hole can move the menstrual blood discharged from the mouth to the liquid absorption layer in a short time, and in the rear part, a small amount of menstrual blood that is slowly moved can be blocked by the embossing part to prevent it from leaking to the outside. Moreover, by arranging a large number of embossed portions in the rear portion, the frictional strength of the non-woven surface of the rear portion can be increased, and when the rear portion receives a force from the gluteal groove, it can prevent the occurrence of fluff or damage. In addition, since the number of embossed portions in the front portion is small, the accuracy of the embossed portion to be connected to the opening and the like will be lower, and the irritation to the mouth and the like will be reduced, and the dressing feeling is better. -8- (5) (5) 200423909 In another aspect of the present invention, the surface sheet contains a heat-fusible fiber, and a second layer containing the heat-fusible fiber is provided below the surface sheet, and the liquid-permeable hole is provided, It is formed from the surface sheet to the second layer, and on the inner surface of the liquid-permeable hole, the surface sheet is fused with the second layer, the embossing part, the surface sheet and the second layer are compressed together, and The surface sheet and the second layer can be made together. In the present invention, since the surface sheet and the second layer are joined around the liquid-permeable hole, the surface sheet is reinforced by the second layer. When subjected to the force from the body, the surface sheet is less prone to creases, and the surface sheet can be prevented from The part of the liquid-permeable hole is broken. Therefore, it is also possible to make the opening size of the liquid-permeable hole larger. In the rear part, if an embossed part is formed on the surface sheet and the second layer, the surface sheet on the rear part is also reinforced by the second layer. If the surface sheet and the second layer are pressed together, the surrounding of the embossed part will become more bulky, and the embossed part will not easily give the body a hard touch. As described above, in order to exert the reinforcing function and to have a high bulkiness, the basis weight of the second layer is preferably larger than the basis weight of the surface sheet. In addition, the present invention can be formed in a configuration in which the liquid-permeation hole is formed in the front portion and the embossed portion is not formed. By forming only the liquid-permeable holes in the front part, the entire area of the front part becomes softer, and the adhesion to the mouth or its periphery becomes softer and better. At this time, the average length of the distance between the centers of the embossed portions adjacent to each other in the rear portion is preferably longer than the average length of the distance between the centers of the liquid-permeable holes adjacent to each other in the front portion. -9- (6) (6) 200423909 By making the opening density of the liquid perforation holes higher in the front part, the menstrual blood discharged from the mouth can be quickly moved from the liquid perforations to the liquid absorbing layer. Since menstrual blood intended to move toward the rear part is less than the menstrual blood received by the front part, even if the embossing density is low, it is sufficient to prevent the movement to the rear. Also, by making the embossing density of the rear part lower, the rear part can be prevented from becoming too hard, and the touch between the rear part and the body can be made softer. The second invention of the present invention is directed to a longitudinal length including a liquid-permeable surface sheet on the skin-side surface, a back sheet on the garment-side surface, and a liquid-absorbing layer between the top sheet and the back sheet. The absorbent article is characterized in that: at a position spaced from the center line in the lengthwise direction toward the left and right sides, a pair of compression grooves extending in the lengthwise direction and formed on the surface sheet to the liquid-absorbing layer are formed, and A longitudinally-shaped central region sandwiching the compression groove is formed, and the central region is divided into a front part and a rear part. In the entire area of the central field, there are surface sheets with uniformly distributed liquid-permeable holes. In the center area, a plurality of dot-shaped embossed portions formed by pressing the above-mentioned surface sheet are formed, and the embossed density obtained by (the total area occupied by the embossed portion in the rear portion) / (area of the rear portion) is calculated, and the ratio is (Sum of the area occupied by the embossed part of the front part) / (Area of the front part) The embossed density is still high. In this absorbent article, the embossed part is also arranged in the rear part so that the embossed part does not irritate the mouth and the periphery, and the menstrual blood to be moved backward can be attracted by the embossed part with high density. live. Moreover, in the above invention, the surface sheet may be a resin film having a liquid-permeation hole in addition to the surface sheet in addition to the above-mentioned surface sheet -10- (7) 200423909. At this time, 'the embossing portion can improve the bonding between the surface sheet and the underlying layer, and can prevent creases on the surface sheet due to friction between the gluteal groove and the like. In addition, the density of the layer under the surface sheet is increased by the embossed portion, and the function of blocking the menstrual blood from moving backward can be exerted in the portion with a high density.

Below the surface sheet of the resin film, a second layer containing heat-adhesive fibers is provided, and the embossing section is compressed together with the surface sheet and the second layer, and the surface sheet and the second layer are fused together As ideal. In this way, in the rear part, it is possible to avoid using an excessive amount of hot-melt adhesive tree to integrate the surface sheet of the fat film with the second layer, and also in the embossing part, which can increase the fiber density of the second layer, and Can attract menstrual blood strongly. In addition, if the structure in which the embossed portion is not formed in the front portion is formed, when the front portion is closely adhered to the mouth and the periphery, the irritation to the skin can be reduced.

As described above, the present invention relates to the front part of the area facing the female mouth, and the rear part of the present invention is the length of the area facing the female part after leaving the female mouth. Absorbent articles are useful. [Embodiment] The absorbent article of the present invention is a sanitary napkin that can be used for the main purpose of absorbing menstrual blood discharged from a woman's mouth. Among the two surfaces of the absorbent article, the surface facing the femoral region is referred to as the skin side surface. (11) 200423909 The surface, the surface on the opposite side 'is referred to as whether or not a garment-side surface is worn on the outside. In the so-called “longitudinal centerline” of this patent specification, the article is halved in the horizontal direction and extends in the longitudinal direction. The horizontal reference line does not necessarily cross the position where the absorbent is halved in half. At the time of the body, the center line of the longitudinal direction of the mouth part. As shown in the following embodiment, in the shape of the central area and the embossed portion, but in this patent specification, 'the number of liquid perforations per unit area of an arbitrary area, for example, 100 m 2') J embossed area The number of parts represents the density of the dense parts of the liquid-permeable holes, respectively. The central area is divided into the front part and the rear part (the sum of the area occupied by the liquid-permeable holes in the front part) / (front) product), and is defined as the opening density in the front part, and the liquid-permeable holes in the same part. Sum of the area) / (The rear part S is defined as the opening density in the rear part, and (Sum of the area occupied by the front part) / (Area of the front part)) defines the embossing density of I, (the embossing of the rear part The area behind the area) is defined as the embossed density of the rear part. Figure 1 is a plan view showing the skin side surface of the sanitary napkin 1 as the first absorbent article of the present invention. Shown in Figure 1 is the sanitary napkin that is set in the inner position. 'It is the clothes in the horizontal direction when viewed from the direction of the arrow. It means to absorb the line. The other product is used in the longitudinal direction to block it. A liquid-permeable hole is formed (the area is 4 and the above-mentioned single set degree and embossing points, but the surface of the part is (the area of the rear L), the sum of the front part of the embossing part) / (degrees.) , Top View, 2nd Underpants -12-200423909 〇) Sectional view of ΙΙ-Π, Figure 3 is an enlarged sectional view showing the front part of the central area of the above-mentioned sanitary napkin, and Fig. 4 is a diagram showing the above-mentioned physiological hygiene An enlarged cross-sectional view of the rear portion of the central area of cotton. The sanitary napkin 1 shown in Fig. 1 is a lengthwise type suitable for women in the physiological period to wear at bedtime. The overall length is approximately 200 to 380 mm. The sanitary napkin 1 includes a right-hand edge portion 1 a and a left side which are spaced at equal intervals from the centerline 〇y-〇y in the horizontal direction and extend in the horizontal direction. The edge portion lb is provided with a front curve portion 1 C and a rear edge portion 1 d having a convex curve shape spaced from the horizontal direction reference line Ox-Ox toward the front and back. Compared to the horizontal direction reference line OX-Ox to the front The distance between the edges 1 c is longer from the horizontal reference line 〇 X-Ο X to the rear edge 1 d. The right edge 1 a and the left edge 1 b mentioned above include the horizontal reference line Ox -〇x protrudes toward the left and right sides within a specific length range Flange portions 1 A and 1 A are formed on the protruding portion. The right edge portion 1 a and the left edge portion 1 b are opposite to each other in the lateral direction as they move away from the lateral reference line 〇 X-〇 X. The gap is gradually formed into a curved shape so as to gradually widen, and rear wings IB, 1B are formed at the widened portion. As shown in the sectional view of FIG. 2, the sanitary napkin 1 is provided with The liquid-impermeable back sheet 2 on the clothing side surface and the liquid-permeable top 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 the top sheet A second layer 5 is provided between 3 and the liquid absorbing layer 4. As shown in the dotted line in Figure 1, the liquid-absorbing layer -13- (10) (10) 200423909 4 is widely arranged from the inside of the leading edge portion 1 c to the inside of the trailing edge portion 1 d, and except A range other than the above-mentioned wing portions 1 A and 1 A and the rear wing portions 1 B and 1 B. At least the surface sheet 3 and the liquid absorbing layer 4 of the sanitary napkin 1 are partially pressurized and heated to form a compression groove 10 appearing on the skin-side surface. The compression groove 10 is formed by an embossing process using a heating roller. In a state where the liquid absorbing layer 4 and the surface sheet 3 are overlapped, the roller having a flat surface is blocked on the outer surface of the liquid absorbing layer 4, and The surface of the surface sheet 3 is formed by contacting a heating roller provided with a convex portion having an embossed pattern, which is pressurized and heated. In the compression groove 10, the liquid-absorbent layer 4 and the surface sheet 3 are pressed and adhered to a substantially thin film-shaped high-density compression portion, and the density is higher than that in areas other than the compression groove 10 which is not compressed into a film The medium-density compression sections are formed to interact with each other. The compression groove provided with the high-density compression portion and the medium-density compression portion is formed as a groove recessed from the skin side surface of the sanitary napkin 1 toward the back sheet 2 side. As shown in FIG. 1, the above-mentioned compression grooves 10 are divided into compression grooves indicated by symbols 11 to 17. The inner compression grooves 1 1 and 1 1 extending in the longitudinal direction are formed at positions spaced apart from the center line Oy-Oy in the longitudinal direction to the right and left by an equal distance. The above-mentioned inner compression grooves 11 and 11 include forward curved portions 1 1 A and 1 1 A. The forward curved portions 1 1 A and 1 1 A become portions in the transverse direction reference line 0x-0x. The interval is narrower and narrower, and the convex side protrudes toward the center line Oy-Oy of the longitudinal direction, which is an arc curve. Along the above forward curve • 14- (11) (11) 200423909 Part 1 1 A, 1 1 A, the opposite interval of the inner compression grooves 1 1, 1 1 will follow the reference line Ox- Ox gradually widened toward the rear (in the direction of the trailing edge 1 d). However, the above-mentioned facing interval is at the bent portion; t〗 b, 1 1 B becomes the widest, and as the bent portion 1 1 B, 1 1 B faces backward, the facing interval will gradually form Behind the narrowed slope; ti D, 1 id. At the front ends of the forward curved portions 1 1 A and 1 1 A, the left and right inner compression grooves Π and the inner compression grooves 11 are connected together by a forward connection compression groove 12. The front connecting compression groove 12 has a curved shape whose convex side faces the leading edge 1c. A pair of extended compression grooves 1 3, 1 and 3 are formed from the intersection of the forward curve portions 1 1 A, 1 1 A and the forward connection compression groove 12 toward the leading edge portion 1 c. At the rear end of 1 1 D, the inner compression groove 11 and the inner compression groove 11 are connected together by a rear connection compression groove 14. The rear connecting compression groove 14 has a curved shape whose convex side faces the trailing edge 1 d. The above-mentioned inner compression grooves 1 1 and 1 1, the forward connection compression grooves 1 2, the extended compression grooves 1 3, 1 3, and the rear connection compression grooves 14 are all formed together. In addition, by the above-mentioned inner compression grooves 1 1, 11 1, the front connection compression grooves 12, and the rear connection compression grooves 14, a specific range of the skin-side surface of the sanitary napkin 1 is enclosed, and the enclosed range becomes Central area 20. The central area 20, which is symmetrical to the longitudinal centerline 〇y-Oy, is shorter than the one in front of the lateral reference line Ox-Ox, and longer from the lateral reference line 0 X-0 X Longitudinal. On the left side of the medial compression grooves Π, 11 before the front curve portions Π A, 11 A -15- (12) (12) 200423909 The right two outer sides' are formed with front lateral compression grooves 15 and 15. The front and outer compression grooves 15 and 15 are formed in a range of a specific length in the longitudinal direction centered on the horizontal direction reference line 0x-0x. The front outer compression grooves 15 and 15 have curved shapes similar to those of the front curved portions 1 1 A and 1 1 A. The rear outer compression grooves 16 and 16 are provided on the left and right outer sides of the inward compression grooves Π, 11 and the rear inclined portions 1 1 D and 1 1 D, respectively. The rear outer compression grooves 16 and 16 are inclined so that the gap gradually narrows toward the rear edge portion 1 d. At the rear, the left and right rear compression grooves 16 and 16 are connected at the rear. Compression grooves are connected at 17 locations. The rear outside compression grooves 16 and 16 and the rear connection compression groove 17 are formed continuously, and the rear connection compression groove 17 has a curved shape whose convex side faces the trailing edge 1 d. The above-mentioned central area 20 is divided into a front portion 20A and a rear portion 20B. The boundary between the front portion 20A and the rear portion 20B and the length in the longitudinal direction of the front portion 20A and the rear portion 20B are different depending on the length in the longitudinal direction of the sanitary napkin 1. When worn on the female body shown in Figure 6, the part facing the mouth (N) is the front part 20A, and the back part 20B is the part that is not facing the mouth (N). For example, it is mainly shown The part from the anus (p) to the vicinity of the gluteal groove (Q). In the embodiment shown in FIG. 1, from the connecting line connecting the tops of the above-mentioned bent portions 1 1 B and 1 1 B of the inner compression grooves 11 and 1 1 to the above-mentioned forward connection compression grooves 1 2 It is the front part 20A. Starting from the connecting line connecting the vertices of the above-mentioned curved parts 1 1 B and Π B, -16-(13) (13) 200423909 to the above-mentioned rear connection compression groove 14 is the rear part 20B. . As shown in FIG. 1, the second layer 5 is a rectangle provided in the central area 20 with the long sides facing the longitudinal direction, and the left and right side edges 5 a and 5 a of the long sides are located more than the inner side. The compression grooves Π, 11 are closer to the longitudinal centerline 〇y-〇y side, and the second layer 5 does not overlap the inner compression grooves Π, 11. The front edge portion 5 b of the short side of the second layer 5 is located on the side slightly closer to the horizontal reference line OX-OX than the front connection compression groove 12, and the second layer 5 does not overlap the front connection compression portion 12. On the other hand, the rear portion of the second layer 5 spans the rear connection compression groove 14 and is the short side rear edge portion 5 c. It is located behind the rear connection compression groove 14 and in front of the rear connection compression groove 17. . In addition, the front portion of the second layer 5 spans the front connection compression groove 12 and the leading edge portion 5 b may be located between the front connection compression groove 12 and the front edge portion 1 c. The front edge portion 5 b of the second layer 5 is also It can extend to the leading edge 1 c and the trailing edge 5 c of the sanitary napkin 1 and extend to the trailing edge 1 d of the sanitary napkin 1. In the above-mentioned central area 20, a majority of the front portion 20A is provided. The regularly arranged liquid-permeable holes 25 are provided at the rear portion 20 B with a plurality of regularly arranged dot-shaped embossed portions 26. In Fig. 1, in order to make it easier to distinguish the liquid permeation hole 25 and the embossed portion 26 on the drawing, the embossed portion 26 is shown with black dots in consideration of convenience. However, in actual products, the embossing section 26 is not intended to be black. In the front portion 20A, the liquid-permeable hole 25 is formed, but the embossed portion 26 is not formed. That is, in the front portion 20A, there are no embossed portions 26 between the liquid-pervious holes 25 and 25 which are adjacent to each other -17- (14) 200423909. However, as shown in Fig. 1, in the limited area of the boundary portion between the front portion 20A and the rear portion 20B, the above-mentioned liquid permeable holes 25 and embossed portions 26 are not prevented from coexisting. In this embodiment, the individual liquid-permeable holes 25 are circular, but the liquid-permeable holes 25 may also be oblong, and the individual liquid-permeable holes 25 may also be shorter slits. In this embodiment, In the rear part 20 B, only the embossing part 26 is provided, and the liquid-permeation hole 25 is not provided. However, the above-mentioned rear portion 20B does not prevent the liquid-permeation holes 25 from being mixed in the embossed portion 26. However, when the liquid-permeable holes 25 are formed in the rear portion 20B, the number of liquid-permeable holes 25 in the rear portion 20B is preferably smaller than the number of the embossed portions 26. Or, the opening density obtained by (the sum of the area occupied by the liquid-permeable holes 25 in the rear portion) / (the area of the rear portion 20 B) is more than the ratio of (the area occupied by the embossed portion 26 in the rear portion) The sum of the embossing densities obtained from the sum of (the area of the rear part 20 B) is low for arbores. In this embodiment, the individual shapes of the embossed parts 26 arranged in a dot shape are circular. However, the dot-shaped embossing portion 26 in this patent specification is not limited to those having a circular shape as described above, and may be an oval shape, a shorter straight shape, or other shapes. In addition, when observing the front part 20A and the rear part 20B of the same area, the number of the embossed parts 26 per specific area in the rear part 20B is greater than the number of the above-mentioned liquid-permeable holes 25 per same area in the front part 20A. less. That is, the density of the embossed portion 26 in the rear portion 20B is lower than the density of the liquid-permeable holes 25 in the front portion 20A. The embossing density at the rear part 20B is calculated by (the sum of the area occupied by the embossed part 26 at the rear part) / (area of the rear part 20B), compared with the area occupied by (the liquid-permeable holes 25 at the front part). The sum of the area) / (the area of the front portion 20A) is obtained, and the opening density in the front portion 20A is still low. Furthermore, in the embodiment shown in FIG. 1, the embossed portion 2 adjacent to each other in the rear portion 20B is compared with the average distance between the centers of the liquid-permeable holes 25 adjacent to each other in the front portion 20A. The average distance between 6 and 6 will be longer. However, the area of the individual embossed portions 26 is larger than that of the individual liquid-permeable holes 25. The opening area of one of the liquid-permeable holes 25 is 0.2 to 8 mm2, and the diameter is 0.5 to 3.2 mm in a circular shape. The distance between the centers of the liquid-permeable holes 25 adjacent to each other is 2 to 8 mm. The area of the bottom portion 26a of the embossed portion 26 is 2 to 10 mm2, and the diameter of the circular portion is 1.6 to 3.6 mm. The distance between the centers of the embossing sections 26 adjacent to each other is 3 to 10 m. In order to make the menstrual blood received by the front part 20A pass quickly and evenly through the liquid absorbing layer 4, the liquid perforation holes 25, it is ideal to arrange the same density at any position of the front part 20 A, as in the first As shown in FIG. 1, it is preferable that the liquid-permeable holes 25 are regularly and uniformly arranged. The percentage of the opening density at the front portion 20A is 6 to 20%. The width of the area in which the liquid-permeable holes 25 are formed must be a width of 10 mm or more in the X direction with the center line 0 y _ 0 y in the longitudinal direction as the center. If the above range is not satisfied, the menstrual blood discharged from the mouth is not easily moved to the liquid absorbing layer 4. On the other hand, in the rear part 20A, the density of the embossed part 26, -19- (16) (16) 200423909 may also vary depending on the location. For example, the density of the embossed portion 26 may be higher near the rear connecting compression groove 14, and closer to the locations of the curved portions 1 B, 1 1 B, the density is lower. Fig. 3 is a diagram showing the opening state of the liquid-permeable hole 25 in the front portion 20A, and Fig. 4 is a diagram showing the formation state of the embossing portion 26 in the rear portion 20B. As shown in FIG. 3, in the front part 20 A, the liquid-pervious holes 25 are formed so as to penetrate the surface sheet 3 and reach the second layer 5. It is preferable that the liquid-pervious holes 25 extend from the surface sheet 3 Formed by the second layer 5. In addition, liquid permeable holes 25 are formed in the surface sheet 3 only at the portions separated from the side edge portions 5a, 5a of the second layer 5. As shown in Fig. 4, in the rear portion 20B, the surface sheet 3 and the second layer 5 are compressed to form the above-mentioned embossed portion 26 which is concave from the skin-side surface toward the liquid absorbing layer 4. Moreover, only the above-mentioned surface sheet 3 is compressed at the portions separated from the side edge portions 5a, 5a of the second layer 5, and an embossed portion 26 formed in a concave shape from the skin-side surface toward the inside of the sanitary napkin is formed. The surface sheet 3 contains thermoplastic fibers which are heat fusible, and the second layer 5 also contains thermoplastic fibers. In this patent specification, the term "containing thermoplastic fibers" refers to the case where the surface sheet 3 or the second layer 5 is formed only of thermoplastic fibers, and not only thermoplastic fibers, but also natural fibers or regenerated cellulose fibers. Two occasions for non-thermolytic fibers. The liquid-permeable hole 25 is formed by a heated needle or pin. In the state where the surface sheet 3 and the second layer 5 overlap, insert the above-mentioned needle or pin from the surface sheet 3 toward -20- (17) (17) 200423909 to the side of the second layer 5 and remove it, that is, A liquid-permeable hole 25 having a shape in which the end 2 5 a protrudes downward is formed. At this time, the thermoplastic fibers contained in the surface sheet 3 and the thermoplastic fibers contained in the second layer 5 are fused to each other on the inner surface 25b of the liquid-permeable hole 25 and its surroundings. Thereby, the shape of the openings of the liquid-permeable holes 25 can be maintained, and at the same time, the periphery of the openings of the liquid-permeable holes 25 can be reinforced by the second layer 5. Since the surface sheet 3 and the second layer 5 are joined together by the above-mentioned thermal fusion, there is no need to bond the surface sheet 3 and the second layer 5 with an adhesive, and the passage of liquid is not hindered by the adhesive. After the liquid-permeation holes 25 are formed, the surface sheet 3 and the second layer 5 are sandwiched between heating rollers to form the embossed portions 26. At this time, a flat roller is blocked on the surface of the second layer 5, and an embossing roller having a convex portion formed from the surface is blocked on the surface sheet 3 side. As a result, the thermoplastic fiber contained in the surface sheet 3 and the thermoplastic fiber contained in the second layer 5 are fused to each other on the inner surface 26b of the embossed portion 26, and at the same time, the outer sheet 3 of the inner surface 26b And the fiber density of the second layer 5 will change. At 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 a high density, and at the bottom portion 2a, the above thermoplastic fibers are melted to become a film or close to this High density. The shape of the embossed portion 26 can be maintained by the fusion of the thermoplastic fibers on the inner surface 26b and the bottom portion 26a, and the surface sheet 3 can be reinforced by the second layer 5. In particular, by making the bottom portion 26a into a high density, the durability of the surface sheet 3 of Table -21-(18) (18) 200423909 can be improved. The surface sheet 3 is formed of an air-through nonwoven fabric. This air-laid non-woven fabric uses a core-sheath composite synthetic fiber whose core portion is polyethylene terephthalate (PET) containing titanium oxide and whose sheath portion is polyethylene (PE). The joints have a basis weight of about 15 to 60 g / m. The above-mentioned composite synthetic fibers constituting the surface sheet 3 are those coated with a hydrophilic oil agent and those coated with a water-repellent oil agent. The mixing ratio of the fiber coated with the water-repellent oil agent is 10 ~ 30% by mass is ideal. By making the surface sheet 3 uniformly contain the fiber coated with water-repellent oil in such a way as to achieve the above-mentioned mixing ratio, the menstrual blood undertaken by the surface sheet 3 can be inhibited from spreading too much in the surface sheet 3 and being 20 A in the front part. The menstrual blood that has passed through is mainly received by the liquid absorbing layer 4 through the liquid-permeable holes 25. However, the above-mentioned surface sheet 3 may pass menstrual blood toward the second layer 5 in areas other than the liquid-permeable holes 25. In order to exert such a liquid-permeating function, the density is preferably 0.12 g / c in, and the lower limit thereof is about 0.025 g / cm3. The second layer 5 is formed of an air-laid non-woven fabric formed of a core-sheath composite synthetic fiber having a core portion of polypropylene (PP) and a sheath portion of polyethylene (PE) and an eccentric cross-section. The air-laid nonwoven fabric of the second layer 5 is formed only of fibers coated with a hydrophilic oil agent, and does not include fibers coated with a water-repellent oil agent. In the embodiment shown in Figs. 3 and 4, the second layer 5 is constituted by stacking a plurality of the above-mentioned air-laid nonwoven fabrics', for example, one in which one air-laid nonwoven fabric is folded into three pieces is folded. The basis weight of one piece of air-laid nonwoven fabric is about 15 to 50 g2 / m, and the basis weight of the entire second layer 5 is about 45 to 150 g / m2. -22- (19) 200423909 By making the basis weight of the second layer 5 larger than that of the surface sheet 3, the surface sheet 3 can be reinforced by the second layer 5 to prevent excessive crepe from being generated on the surface sheet 3. Wrinkles or breakage may occur from the liquid-permeable holes 25. For example, the surface sheet 3 is composed of a fiber having a fineness of 2.2 dt ex, the second layer 5 is composed of a fiber having a fineness of 4.4 d t e X, and the fiber density of the second layer 5 is lower than that of the surface sheet 3. The fiber density of the second layer 5 is 0.016 to 0.08 g / cm3.

The surface sheet 3 and the second layer 5 may be formed of a non-woven fabric other than the aforementioned air-laid non-woven fabric. For example, the surface sheet 3 is formed of a spunlace non-woven fabric composed of regenerated cellulose fibers and heat-fusible thermoplastic fibers, or a spunlace non-woven fabric in which the fibers contain pulp, and the second layer 5 'also It can be formed by air-laid non-woven fabric in which pulp and thermoplastic fibers are laminated in the air and bonded with an adhesive, and pressed between heating rollers.

The liquid-absorbent layer 4 can be a synthetic water-absorptive polymer containing polyacrylate, polypropylene amidamine, maleic anhydride, and the like in an aggregate of pulverized pulp, cellulose saponified pulp, and cross-linked pulp. Materials, or natural absorbent polymers such as starch and cellulose, and the pulp and the synthetic water-absorbing polymers mentioned above are those covered with hydrophilic fiber paper. The back sheet 2 is a liquid-impermeable and air-permeable sheet, and is a polyethylene (PE) film or a polypropylene (pp) film formed with fine ventilation holes. For example, by mixing CaC03, BaS04 and other inorganic samarium fillings in plastic flakes, and through extension treatment, they can be appropriately dispersed to form fine vent holes to improve air permeability and form a film with a thickness of about 15 to 5 0 // m -23- (20) (20) 200423909 The above-mentioned second layer 5 and liquid-absorbent layer 4 are adhered by a partially-arranged hot-melt adhesive in a manner that does not hinder liquid transmission. The liquid absorbing layer 4 and the back sheet 2 are also bonded by 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 either of the liquid-permeable holes 25 or the embossed portion 26 is formed first, and then the liquid-absorbing layer is formed. 4 and the second layer 5 are followed to form the above-mentioned compression groove 10. Thereafter, the back sheet 2 is adhered to the surface of the liquid absorbing layer 4. As shown in FIG. 2, liquid-impermeable sheets 30 are provided on the left and right sides of the skin-side surface. The liquid-impermeable sheets 1 A and 1 A and the rear wings 1 B and 1 B are provided on the skin side. 3 0 and 3 0 are adhered to the back sheet 2 by a hot-melt adhesive. From the longitudinal centerline 0 y-〇 y away from the left and right positions, the liquid-impermeable sheet 30 is folded into two overlaps, and an elastic member 32 extending in the longitudinal direction is next to the inside. With the elastic member 32 described above, the elastic contraction force acts between the front part and the rear part of the sanitary napkin 1 to produce a force for bending the sanitary napkin 1. As a result, the sanitary napkin 1 In the middle part of the front and back, the liquid-impermeable sheets 30 and 30 stand up to form leak-proof walls 3 1 and 31. The liquid-impermeable sheet is formed by spunbond (spunbond) non-woven fabric, meltblown non-woven fabric, or a laminated non-woven fabric. The basis weight of the liquid absorbing layer 4 is the largest in the central area 20. It is sandwiched between the inner compression grooves 1 1 and 11 and the front outer compression grooves 1 5 and 15, and -24- (21) (21) 200423909 is sandwiched between the inner compression grooves π and π and the rear outer compression grooves 1 6 The parts 16 and 16 and the parts sandwiched between the rear connecting compression groove 14 and the rear connecting compression groove 17 are respectively smaller in basis weight than the central area 20 described above. The basis weight of the liquid absorbing layer 4 other than that is the same as or slightly smaller than the portion sandwiched between the inner compression grooves 丨 丨, 1 丨 and the front outer compression grooves 15 and 15. The ideal basis weight of the liquid absorbing layer 4 in the central area 20 is 400 to 1 200 g / m2, and more preferably 500 to 1 000 g / m2. Portions sandwiched by the above-mentioned inner compression grooves 11, 11 and the front outer compression grooves 15, 15, portions sandwiched by the inner compression grooves 11, 11, and the rear outer compression grooves 16, 16, and The ideal basis weights of the portions sandwiched between the rear connecting compression grooves 14 and the rear connecting compression grooves 17 are 300 to 900 g / m2, and more preferably 350 to 600 g / m2. The ideal basis weight of the liquid absorbing layer 4 in other parts is 3,000 to 700 g / m2. As a result, as shown in FIG. 2, the thickness of the central area 20 is large, and in the central area 20, the skin-side surface has a shape that swells toward the body. The dimension in the longitudinal direction of the central area 2 0 ', that is, the interval in the longitudinal direction between the front connecting compression groove 12 and the rear connecting compression groove 14 is 1 2 0 to

About 300 mm. The wide size of the central area 20 on the horizontal reference line Ox-Ox shown in FIG. 2, that is, the wide size W 1 'of the narrowest portion of the front portion 20A is corresponding to the female SS. Decide. Since the average width of the female crotch region is about 30 mm ', the above-mentioned wide size W1 is preferably in a range of 15 to 50 mm, and more preferably in a range of 20 to 40 mm. In addition, the curved portions 1 1 B -25- (22) 200423909. of the inner compression grooves 11 and 11 are about 10 to 40 mm wider than the wide width W1. The above-mentioned rear portion 20B of the central area 20 is a size that can easily enter the gluteal groove (Q) of the female body shown in FIG. 6, and the length, that is, from the curved portion 1 1 B, 1 1 B to the rear connecting compression groove The length dimension of 14 is about 60 ~ 150mm.

When the sanitary napkin 1 is worn on the body, the pressure-sensitive adhesive provided on the outside of the back sheet 2 is adhered to the inner surface of the chin cloth 4 1 shown in FIG. 2. At this time, the rear wings 1 B , 1 B is also attached to the inner surface of the underwear. In addition, the side flaps 1 A and 1 A are to be rolled toward the outer surface of the underpants so that the edges of both sides of the chin cloth 4 1 are rolled in, and the side flaps 1 A and 1 A are provided. The pressure-sensitive adhesive on the side surface of the garment is adhered to the outer surface of the diaper cloth 41.

As shown in FIG. 6, in the state that the sanitary napkin 1 of the underpants is equipped with the sanitary napkin 1, when wearing the underpants, the skin side surface of the sanitary napkin 1 will be used to remove the femoral panties. The pubic hump (M) of the part is covered behind the gluteal groove (Q). As shown in FIG. 2, the central area 20 sandwiched between the inner compression grooves 11 and 1 丨 expands toward the body side, and the central area 20 has a higher bulkiness than the other parts. Therefore, the central portion 20 A with a high bulkiness of the front part 20 A is easy to closely adhere to the mouth (N), and more preferably, the portion across the transverse direction reference line 〇 X-Ο X is closely attached to the mouth. (N) the central part. In addition, the widened parts 1 1 B and 1 1 B sandwiched between the inner compression grooves 11 and 11 are mainly connected to the perineum (0), and the central area 2 0 -26- (23) (23) 200423909 Fang Yan points 2 B, and blocks from the anus (p) to the gluteal groove (q). The surface sheet 3 located on the skin-side surface of the central area 20 is a low-density air-laid nonwoven fabric, and a second layer 5 of the air-laid nonwoven fabric having a high bulkiness is disposed below it. Therefore, the central area 20 gives the above-mentioned parts of the body a soft touch. In particular, since there is no embossed portion 2 6 ′ at the front part 20 A, the entrapment 25 and its periphery will not be blocked by the embossed part, and there will be no contact irritation at the entrapment and its periphery. Since the embossed portion 26 located at the rear portion 20B is formed deeply on the surface sheet 3 to the second layer 5, the high-density portion of the bottom portion 26a of the embossed portion 26 becomes difficult at the rear portion 20B. Block directly to the body. Therefore, the embossed portion 26 is less likely to be stimulated in the perineum (0), the anus (P), and the gluteal groove (Q). Menstrual blood discharged from the mouth (N) is mainly used by the central area 2 0 is taken over by the previous section 20A. Since the surface sheet 3 is a low-density non-woven fabric, although the menstrual blood penetrates into the surface sheet 2, the surface sheet 3 is coated with a fiber containing a water-repellent oil agent, so the menstrual blood can be prevented from spreading on the surface sheet 3. The menstrual blood received on the surface sheet 3 will move to the second layer 5 immediately below it. However, since the second layer 5 has a gap inside the air-laid nonwoven fabric, the menstrual blood will pass through the gap of the second layer 5 by gravity. And is attracted by the liquid absorbing layer 4 located below it. However, most of the menstrual blood received by the front part 20 A passes through the liquid-permeable hole 25 quickly and is attracted by the liquid-absorbing layer 4 which is closely attached to the lower side of the second layer 5. In this way, the menstrual blood 'discharged from the mouth (N) is quickly absorbed by the liquid absorbing layer 4 at the front portion 20A. However, “at bedtime posture” there is menstrual blood that flows over the body's perineum (0) toward the anus (P) and the gluteal groove (Q). When the front part 20A receives a large amount of menstrual blood, a part of the part may move along the surface of the surface sheet 3 toward the rear part 20B. The menstrual blood moving in the rear part 20B is strongly attracted by the capillary action of the high-density part around the embossed part 26, but the high-density part is formed on the surface sheet 3 to the second layer 5, so the menstrual blood will follow The high-density portion moves from the surface sheet 3 to the second layer 5 and is attracted and held by the highly hydrophilic liquid-absorbing layer 4 below it. The liquid-permeable hole 25 is not formed in the rear portion 20 B, but the amount of menstrual blood moved to the rear portion 20B is less than the menstrual blood received by the front portion 20 A, so it can be distributed in a dot shape on the rear portion 20B. The embossing portion 26 is sufficient to capture menstrual blood that is to flow backward. Therefore, menstrual blood can be prevented from leaking toward the rear. Here, the rear portion 20 B is closely adhered from the anus (P) to the gluteal groove (Q). In response to the motion of the buttocks, the compression force from the side is repeatedly applied to the rear portion 10 B. Also, a large change in body posture like turning over at bedtime will also exert a pressure on the rear portion 20B, and the pressure will change. However, the rear portion 20B is provided with an embossed portion 26 to improve the durability of the surface sheet 3, and by the embossed portion 26, the surface sheet 3 is reinforced by the second layer 5. Therefore, it is possible to eliminate the anxiety that large creases, surface fluffing, and breakage occur at the rear portion 20B. Fig. 5 is a partial plan view illustrating a sanitary napkin according to another embodiment. In Fig. 5, only the compression grooves 11 to 17 and the central area 20 to -28- (25) 200423909 and the second layer 5 are shown. The other part is due to the first! The physiological sanitary napkin 1 of the first embodiment shown in the figure is the same ', so the illustration is omitted. The shapes and structures of the compression grooves 11 to 17 are the same as those of the first embodiment shown in FIG.

As shown in FIG. 5 (also described in the embodiment of FIG. 丨), the central area surrounded by the inner compression grooves 1 1, 1 1, the forward connection compression grooves 2 and the rear connection compression grooves 1 4 The starting point of the deformed parts 1 1 B, 1 1 B is 20A, and the starting position of the deformed parts 11B, 1 1 B is 20 A, and the rear part is 2 b. The front part 20A is the first front part 20A 1 with the horizontally-spaced reference line 0x_0x as the center in the longitudinal direction. The first front part 20A 1 is the second front part 20A2, and the rear part. For the third front part 2 0A: 3 〇

The sanitary napkin is mainly the first front part 20 A 1 facing the mouth (N), and the third front part 20A 3 facing the back of the mouth (N). In this patent specification, since the part located behind the part which is not blocked by the mouth can be defined as the part behind the central area 20, the embodiment shown in FIG. 5 may also include 20 A3 And the area of 20B is called the rear part. However, in the following, 20B is defined as the rear portion, and 20 A 3 is defined as the third front portion as described above. In Fig. 5 ', the embossed portion 26 in the center region 20 is shown with a white dot without blackening. However, the illustration of the liquid-permeable holes is omitted. The individual above-mentioned embossed sections 2 6 are all formed from the same area, but -29- (26) (26) 200423909 its density ', that is, the number of embossed sections 2 6 per unit area, which are blocked at the mouth The first front portion 20A1 will be lower, the rear portion 20B and the second square portion 20a2, and the third front portion 20A3 will be higher. Also, (total the area occupied by the embossed portion 26 of the first front portion 20 A1) / (the area of the front portion 20A1) as the embossed density A1 'will be (the embossed portion of the second front portion 20A2) The sum of the area occupied by 26) / (the area of the second front portion 20A2) is taken as the embossing density A2, and the sum of the area of the embossed portion 26 of the third front portion 20A3) / (the third front portion 2) 〇A3 area) as the embossing density A3, if (the total area of the embossing portion 26 of the rear portion 20B) / (area of the rear portion 20B) is the embossing density b, the specific embossing density A1, embossing The flower density A2, A3 and embossing density B are all low. Also in this embodiment, the embossed density A i, the embossed density A2, and the embossed density B are substantially equal. In addition, the embossing density A1 is equal to or less than 1/5 of the embossing density A2, A3, and embossing density B, and more preferably 1 / 丨 0 or less. Therefore, the embossing density obtained by (the total area occupied by the embossed portion 26 of the front portion 20A) / (the area of the front portion 20A) is greater than the area occupied by (the embossed portion 26 of the rear portion 20B) The sum of the embossing densities obtained from the total) / (area of the rear portion 20B) is low. The embossing density of the former is 1/5 or less, and more preferably 1/1 or less. The embodiment shown in FIG. 5 is further behind the inflection portions 1 1 B and 1 1 B of the inner compression grooves 11 and 11 and inside the rear inclined portions 丨 i D and 1 1 D. A short compression groove is formed! 8, 1 8. The short compression grooves 18 and 18 are the same as the compression grooves π to 17 described above, for the surface sheet 3 and the suction -30- (27) 200423909 The liquid layer 4 is compressed and the local density compression section and the low density compression section are alternately formed. In this way, in the rear portion 20B, in addition to the dot-shaped embossed portion 26, the short compression portions 18 and 18 described above exist, but in the definition of the embossed density of the dot-shaped embossed portion 26, The area of the short compression portion is the total of the area occupied by the embossed portion 26.

As a sanitary napkin provided with an arrangement pattern of the embossed portion 26 shown in FIG. 5, a second embodiment and a third embodiment shown below can be configured. First, it is located in the above-mentioned central area 2 in the second embodiment. The surface sheet 3 of 〇 is formed of the same non-woven fabric as the first embodiment shown in FIG. 1, and similar to the one shown in FIG. 3, a liquid-permeable hole 2 5 is formed to penetrate the surface sheet 3 and the second layer 5. . The liquid-permeable holes 25 may be distributed in the entire area of the front part 20 A in the same manner as in the first figure, or may be evenly distributed in the first front part 2 0 A 1 and the second front part 20 A 2. Furthermore, in the second embodiment, the liquid-pervious holes 25 may be formed in the rear portion 20B. However, the opening density obtained by (the sum of the opening area of the liquid-permeable holes 25 in the front part 20 A) / (the area of the front part 20 A) will be smaller than that of (the liquid-permeable holes 25 in the rear part 20B) The total opening area) / (the area of the rear part 20 B) has a higher opening density. In addition, the embossing density obtained by (the sum of the area occupied by the above-mentioned embossed portion 26 in the rear portion 20B) / (the area of the rear portion 20B) is smaller than the area occupied by the above-mentioned embossed portion 26 in the front portion 20A The total) / (the area of the front part 20A) has a higher embossing density. -31-(28) 200423909 This is the same as when the range of 20 A1 and 20 A2 in Figure 5 are defined as the former part and the range of 20 A3 and 20B are defined as the rear part.

In this way, in the front portion 20A, because there are many liquid-permeable holes 25, in the front portion 20A, especially in the first central portion 20A1, menstrual blood can pass through the liquid-permeable holes 25 by its own weight and quickly move to the liquid-absorbing layer 4 . Also at the front portion 20A, especially the first central portion 20A1, since the embossed portion 26 is less, the accuracy with which the embossed portion 26 is blocked by the mouth will become lower. On the other hand, since there are a large number of embossed portions 26 in the rear portion 20B, when the rear portion 20B enters the gluteal groove and receives pressure or friction from the body, it is possible to prevent fluffing on the surface sheet 3 located in the rear portion 20B. Or damage may occur from the liquid-permeable holes 25. In addition, as shown in FIG. 5, the number of embossed portions 26 is small.

The liquid permeable hole 25 is the second front portion 20A2 and the third front portion 20A3 which are dominant before and after the first front portion 20A1. Because of the high density of the embossed portion 26, the surface sheet of the front portion 20A1 may be By strengthening it later, it is possible to prevent creases and the like on the surface of the first front part 20 A 1 from being too large, or damage caused by the liquid-permeable holes 25. In the third embodiment of the present invention, the surface sheet 20 located in the central area 20 shown in FIG. 5 is a resin film as described above, which is formed of a resin film provided with a liquid-permeable hole, for example, a white turbid resin containing titanium oxide. The polyethylene film 'has a thickness of about 15 to 5 0 // m. It is possible to use a softened 楱 f grease film on the surface of a roller having a large number of openings, and draw a large number of liquid-permeable holes by sucking air from the inside of the roller -32- (29) (29) 200423909. Individual above-mentioned liquid-permeation holes are circular or oblong. Alternatively, a resin film can be used to form a mesh structure, and a hole is formed in the mesh portion. The average width of the individual liquid-permeable holes is 0.2 to 2 mm, and the opening ratio of the liquid-permeable holes is preferably 10 to 30%. In FIG. 5, if the above-mentioned resin film having a large number of liquid-permeable holes is provided as the surface sheet 3 in the central area 20 (including other areas), it will become an evenly dispersed liquid-permeability provided in the entire area of the central area 20 Hole 〇 At this time, in the embossed portion 26 shown in FIG. 5, the resin film and the second layer below it are heated and pressed together. In the embossed portion 26, the surface sheet 3 of the resin film and the first Level 5 is integrated. The fiber density of the second layer 5 in the embossed portion 26 becomes higher. In this third embodiment, menstrual blood can also pass through the liquid-perforation holes formed in the resin film at the front part 20 A, and can pass between the fibers of the liquid-permeable layer 5 by its own weight, and can quickly move to the liquid-absorbing layer 4. Also at the front part 20 A, especially the first central part 20A1, since there are fewer embossed parts 26, the accuracy with which the embossed parts 26 are blocked from the mouth will become lower. On the other hand, in the rear portion 20B, the menstrual blood can also pass through the liquid-permeable layer formed on the surface sheet 3 and move quickly to the liquid-permeable layer 4, but at the same time, in the second layer where most of the embossed portions 26 are present The higher the fiber density of 5, menstrual blood will be strongly attracted. In the rear portion 20B, since the surface sheet 3 and the second layer 5 are joined by the embossed portions 26 that are mostly present, it is possible to prevent the resin from entering the gluteal groove when receiving pressure or friction from the body. The surface sheet 3 formed by the film is excessively wrinkled. -33- (30) (30) 200423909 In addition, the interface between the surface sheet 3 and the liquid-permeable layer 5 of the resin film is improved by the hot-melt adhesive. Since 3 is bonded to the liquid-permeable layer 5, the application amount of the hot-melt adhesive can be reduced, so that there is less concern that the penetration of liquid from the surface sheet 3 toward the liquid-permeable hole 5 will be hindered by the hot-melt adhesive. The present invention is not limited to those described above, and various modifications are possible. For example, even if the front connecting compression grooves 1 2 and the rear connecting compression grooves 14 are not provided, the left and right inner compression grooves 11 and 11 may be formed independently of each other. [Effects of the Invention] As described above, in the present invention, the menstrual blood can be reliably captured by the central area of the longitudinal type sandwiched between the compression grooves, and the menstrual blood can be effectively prevented from moving backward. It can also improve the durability of the surface sheet in the central area, which can eliminate the anxiety of excessive creases or breakage due to the force from the body. [Schematic description] Figure 1 shows the absorbent article of the present invention. A plan view of a sanitary napkin according to the first embodiment. Fig. 2 is a cross-sectional view of Π-ΙΙ cut in a state where the sanitary napkin shown in Fig. 1 is mounted on the lower part of the undergarment when viewed from the direction of the arrow at the reference line in the horizontal direction. -34- (31) 200423909 Figure 3 is an enlarged cross-sectional view showing the opening state of the liquid-permeable hole formed in the front part. Fig. 4 is an enlarged sectional view showing a forming state of an embossed portion formed at a rear portion. Fig. 5 is a plan view showing a sanitary napkin according to the second embodiment and the third embodiment of the present invention. Fig. 6 is a sectional explanatory view showing a state in which a sanitary napkin is set on the body.

DESCRIPTION OF SYMBOLS 1, 1 A: Sanitary napkin 2: Back sheet 3: Surface sheet 4: Liquid absorption layer 5: Second layer

1 0: Compression groove 1 1: Inner compression groove 2 0: Central area 20A: Front portion 20B: Rear portion 2 5: Liquid perforation hole 26: Embossed portion -35-

Claims (1)

(1) 200423909 Patent application scope 1 · An elongated absorbent article is provided with a liquid-permeable surface sheet on the skin-side surface, a back sheet on the garment-side surface, and the surface sheet The longitudinally absorptive article with the liquid-absorbing layer between the back sheet and the above-mentioned sheet is characterized by: At a position spaced from the center line in the longitudinal direction to the left and right sides, a pair of compression grooves extending in the lengthwise direction and formed between the surface sheet and the liquid absorbing layer are formed, and are sandwiched by the compression grooves. In the vertical central area, the central area is divided into a front portion and a rear portion. In the central area, a surface sheet formed of a non-woven fabric is formed. In the central area, a large number of transparent layers that penetrate at least the surface sheet are formed. Liquid pores, and most of the point-like embossed portions on which at least the surface sheet is pressed 7 The density of the openings obtained by (the sum of the area occupied by the liquid-permeable holes in the front part) / (the area of the front part) / the area ratio of (the sum of the area occupied by the liquid-permeable holes in the rear part) / (the area of the rear part) The density of openings is still high. The embossed density obtained by (the total area of the embossed portion in the rear portion) / (the area of the rear portion) is greater than the (total area of the embossed portion in the front portion) / ( The area of the front part) has a high embossing density. 2. The longitudinally absorptive article according to item 1 of the scope of patent application, wherein the surface sheet contains thermally fusible fibers, and a second layer containing thermally fusible fibers is provided below the surface sheet. The liquid-permeation holes are formed from the surface sheet to the second layer. On the inner surface of the liquid-permeation holes, the surface sheet is fused with the second layer. The embossed part, the above table-36- (2) 200423909 The surface sheet and the second layer are compressed together, and the surface sheet and the second layer can be fused together. 3. If the lengthwise absorbent article in item 2 of the patent application, the basis weight of the second layer is greater than the basis weight of the surface sheet. 4 · The longitudinally absorptive article according to item 1, 2 or 3 of the scope of patent application, wherein the liquid-pervious hole is formed in the front portion, and the embossed portion is not formed. 5. The lengthwise absorbent article according to item 4 of the scope of patent application, wherein the average distance between the centers of the embossed portions adjacent to each other in the rear portion is larger than the liquid-permeable holes adjacent to each other in the front portion. The average length of the distance between the centers. 6 · —An elongated absorbent article is provided with a liquid-permeable surface sheet on the skin-side surface, a back sheet on the garment-side surface, and liquid absorption between the above-mentioned surface sheet and the above-mentioned back sheet Layered longitudinally absorbent articles are characterized by: A pair of compression grooves extending in the lengthwise direction and formed on the surface sheet to the liquid absorbing layer are formed at positions spaced from the centerline to the left and right sides, and a compression groove is sandwiched between the compression grooves. Vertically-shaped central area 'The above-mentioned central area is divided into a front part and a rear part. In the entire area of the above-mentioned central area, there are surface sheets evenly distributed with liquid-pervious holes, and a large number of the above-mentioned surface sheets are formed in the central area. The point-shaped embossed portion formed by pressing is the embossed density obtained by (sum of the area occupied by the embossed portion in the rear portion) / (area of the rear portion), which is larger than (the area occupied by the embossed portion in the front portion). Sum of area) / (Area of front part) -37- (3) 200423909 The embossing density is still high. 7. The longitudinally absorptive article according to item 6 of the scope of patent application, wherein the above-mentioned surface sheet is a resin film formed with liquid-permeable holes. 8. The elongated absorbent article according to item 6 or 7 of the scope of patent application, wherein a second layer containing heat-fusible fibers is provided below the surface sheet, the embossed portion, and the surface thereof The sheet is compressed together with the second layer, and the surface sheet is fused with the second layer. 9. The elongated absorbent article according to item 6 or 7 of the scope of patent application, wherein the aforementioned embossed portion is not formed on the front portion. 10. The longitudinal absorbent article according to item 1, 3, 6 or 7 of the scope of the patent application, wherein the front part is a field facing a woman's mouth, and the rear part is a part from The above part of the women's mouth has left the area behind it. -38-