JP2009240588A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article in which a skin abutting part is partially composed of a nonwoven fabric and yet the nonwoven part is hard to hold discharged liquid, and which is excellent in concealment property of a discharge part absorbed in the reverse side of the nonwoven part. <P>SOLUTION: In the absorbent article having an absorbent body 4 and a liquid permeable skin abutting surface 3F covering the surface side of the absorbent body 4, the skin abutting surface 3F comprises a mesh sheet part 3M composed of a resin mesh sheet 31 and a nonwoven fabric part 3N which does not overlap the mesh sheet 31 and is composed of a nonwoven fabric 32. The mesh sheet part 3M and the nonwoven fabric part 3N contain titanium oxide and the titanium oxide content in the nonwoven fabric part 3N is within the range of ±50% with respect to the titanium oxide content in the mesh sheet part 3M. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a disposable absorbent article such as a sanitary napkin, a panty liner, a urine absorption pad, and a disposable diaper for absorbing menstrual blood, cages, and the like.

Conventionally, as absorbent articles such as panty liners, sanitary napkins, and incontinence pads, liquid-impervious backsheets such as polyethylene sheets or polyethylene sheet-laminated nonwoven fabrics, and liquid-permeable top sheets such as nonwoven fabrics or liquid-permeable plastic sheets And an absorbent body having a compression restoring property made of cotton-like pulp or the like is interposed therebetween.
Since the top sheet forms a skin contact surface, it is required to be flexible, to obtain a dry touch even after excretory fluid absorption, and to be less irritating to the skin. Resin mesh sheets widely used in the field of absorbent articles, especially sanitary napkins, do not have water retention, so they satisfy the demand for a dry feel. It is not preferred by some users because it is different.
In order to solve this, the entire skin contact surface is not composed of a mesh sheet, but both sides in the width direction of the resin mesh sheet over the entire skin contact region are partially covered with a nonwoven fabric, and these nonwoven fabrics The thing which exposed the mesh sheet | seat part between the parts is proposed (refer patent document 1).
JP-A-6-142135

  However, if the mesh sheet is partially covered with a nonwoven fabric, there are problems such as the excretion fluid being easily retained in the nonwoven fabric portion. On the other hand, if the mesh sheet is not provided in the nonwoven fabric part, the excretion part absorbed on the back side of the nonwoven fabric part is easily visible through the nonwoven fabric, and the concealment property of the excretion liquid after use is inferior, the mesh sheet part and the nonwoven fabric part. When the excretory fluid is absorbed, the non-woven fabric portion absorbs more, that is, it gives the user the impression that it is absorbed evenly.

  Therefore, the main problem of the present invention is that although the skin contact surface is partially composed of a nonwoven fabric, excretion fluid is difficult to be retained in the nonwoven fabric portion, and the appearance of the nonwoven fabric portion and the mesh sheet portion after absorption is good. The object is to provide an absorbent article with little difference.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
In an absorbent article having an absorbent body and a liquid-permeable skin contact surface covering the surface side,
The skin contact surface is composed of a mesh sheet portion made of a resin mesh sheet, and a nonwoven fabric portion that does not overlap the mesh sheet and is made of a nonwoven fabric,
The mesh sheet portion and the nonwoven fabric portion contain titanium oxide, and the titanium oxide content of the nonwoven fabric portion is within a range of ± 50% with respect to the titanium oxide content of the mesh sheet portion.
An absorbent article characterized by the above.

(Function and effect)
In this invention, since a mesh sheet does not overlap with the nonwoven fabric part which is a part contact | abutted to skin, excretion liquid is hard to be hold | maintained at a nonwoven fabric part. In addition, regarding the titanium oxide content that has a very strong influence on the concealability in the mesh sheet portion and the nonwoven fabric portion, the nonwoven fabric portion is within a range of ± 50% with respect to the mesh sheet portion. The difference in appearance between the portion and the mesh sheet portion is small. In addition, the amount of expensive mesh sheets used can be reduced.

<Invention of Claim 2>
The mesh sheet has a thickness of 0.01 to 0.2 mm, an area of individual openings of 0.01 to ¹ mm ² , an opening ratio of 15 to 50%, and a titanium oxide content of 2% by weight or more. ,
The non-woven fabric of the non-woven fabric portion has a fiber basis weight of 10 to 50 g / m ² .
The absorbent article according to claim 1.

(Function and effect)
When the mesh sheet and the nonwoven fabric are such, both the nonwoven fabric portion and the mesh sheet portion have sufficiently high opacity. Therefore, it is excellent also in the concealment property of the excretory fluid absorbed on the back side of the mesh sheet portion and the nonwoven fabric portion. In addition, an opening ratio means the ratio of the total area of the opening which occupies for the whole area of a mesh sheet.

<Invention of Claim 3>
The absorbent article according to claim 1, wherein the nonwoven fabric portion is embossed with a predetermined pattern.

(Function and effect)
When the pattern by embossing is formed in the nonwoven fabric part, the concealment property of excretion liquid becomes still more by the camouflage effect of the pattern. Moreover, since the unevenness | corrugation by embossing is formed in the skin contact surface, the touch becomes smooth like a mesh sheet.

<Invention of Claim 4>
The mesh sheet forming the mesh sheet portion and the non-woven fabric forming the nonwoven fabric portion have an overlapping portion at least in the vicinity of the boundary between the mesh sheet portion and the nonwoven fabric portion, and the mesh sheet in the overlapping portion and the nonwoven fabric portion. The absorbent article according to claim 3, wherein the nonwoven fabric is integrated by embossing.

(Function and effect)
When such embossing is applied, the mesh sheet portion and the non-woven fabric portion are less likely to peel off at the boundary between the two, and a sense of incongruity (particularly a foreign body feeling) due to the edge of the material hitting the skin is less likely to occur. . Moreover, since the change of the touch from a mesh sheet | seat part to a nonwoven fabric part becomes loose, a discomfort is hard to generate | occur | produce.

<Invention of Claim 5>
The absorptive article according to claim 1 in which said nonwoven fabric part consists of a water-repellent nonwoven fabric which has a penetration hole penetrated in the front and back direction.

(Function and effect)
By using the perforated water-repellent nonwoven fabric in this way, the excretory fluid can easily move from the nonwoven fabric portion to the absorber side, that is, the absorption speed of the nonwoven fabric portion is increased. As a result, it becomes difficult for the excretory liquid to be retained in the nonwoven fabric portion.

<Invention of Claim 6>
The absorbent body is formed of an aggregate of pulp fibers containing a superabsorbent polymer, and the absorption rate of the superabsorbent polymer contained in the portion overlapping the non-woven fabric portion is 0.1 to 5 g / g / sec. The absorptive article according to any one of claims 1 to 5.

(Function and effect)
By containing a superabsorbent polymer having a high absorption rate in the portion of the absorbent body that overlaps with the non-woven fabric portion, the absorption rate in the non-woven fabric portion is increased and the excretion fluid is hardly held in the non-woven fabric portion. The “absorption rate” of the superabsorbent polymer means a value measured by JIS K 7224-1996 “Test method for water absorption rate of superabsorbent resin”.

<Invention of Claim 7>
The said absorber is formed with the fiber assembly containing a pulp fiber, and the pulp fiber content in the part which overlaps with the said nonwoven fabric part is larger than the pulp fiber content contained in the part which overlaps with the said mesh sheet part. The absorbent article of any one of -6.

(Function and effect)
By containing many pulp fibers in the portion of the absorbent body that overlaps with the nonwoven fabric portion, a sufficient absorption amount (retention fluid retention amount) can be secured, and the absorption in the nonwoven fabric portion is less likely to be saturated. Therefore, it becomes difficult for the excretion liquid to be held in the nonwoven fabric portion.

<Invention of Claim 8>
The absorbent body is formed of a fiber assembly, and a fiber density of a portion of the absorbent body that overlaps with the nonwoven fabric portion is 0.06 to 0.005 g / cm ³ , and does not overlap with the nonwoven fabric portion. The absorbent article according to any one of claims 1 to 7, wherein the fiber density of the portion is high.

(Function and effect)
If the fiber density of the part which overlaps a nonwoven fabric part among absorbers is made low, the absorption speed of the said part will become quick. Therefore, it becomes difficult for the excretion liquid to be held in the nonwoven fabric portion. Further, the absorption amount (retention fluid retention amount) can be secured by a portion that does not overlap with the nonwoven fabric portion.

<Invention of Claim 9>
The absorbent article of any one of Claims 1-8 in which the ditch | groove is formed in the surface of the part which overlaps with the said nonwoven fabric part among the said absorbers.

(Function and effect)
If the absorbent body has a concave groove on the surface of the portion that overlaps the nonwoven fabric portion, the inside of the concave groove becomes a receiving space for excretory fluid, and the absorption speed of the portion increases. Therefore, it becomes difficult for the excretion liquid to be held in the nonwoven fabric portion.

<Invention of Claim 10>
A nonwoven fabric forming the nonwoven fabric portion is provided over the entire main absorption region determined by the skin contact surface,
Among the both sides in the width direction on the surface of this nonwoven fabric and the intermediate part located between them, a part or the whole of the intermediate part is covered with the mesh sheet, and both side parts are not covered with the mesh sheet,
The portion of the nonwoven fabric covered by the mesh sheet forms the mesh sheet portion, and the portion not covered by the mesh sheet constitutes a skin contact surface as the nonwoven fabric portion.
The absorptive article according to any one of claims 1 to 9.

(Function and effect)
By adopting such a structure, the peripheral edge portion that is likely to come into contact with the skin or the contact pressure with respect to the skin is likely to increase due to the non-woven fabric portion among the skin contact surfaces. Become prominent. In addition, since the number of members constituting the skin contact surface is small (one nonwoven fabric and one mesh sheet, the conventional one requires two nonwoven fabrics and one mesh sheet), the manufacturing cost can be reduced. Can be manufactured easily.

  As described above in detail, according to the present invention, although the skin contact surface is partially composed of a nonwoven fabric, excretion fluid is difficult to be retained in the nonwoven fabric portion, and the excretion portion absorbed on the back side of the nonwoven fabric portion. Advantages such as an absorbent article having excellent concealability are provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
<Example of basic structure of sanitary napkin>
1 is a developed view of a sanitary napkin 1 according to the present invention, FIG. 2 is a view taken along the line II-II in FIG. 1, FIG. 3 is a view taken along the line III-III in FIG. FIG. The sanitary napkin 1 includes a liquid-impervious back sheet 2 made of a polyethylene sheet, a skin contact member 3 that has a skin contact surface 3F, and allows rapid passage of menstrual blood, venom, and the like. Absorbers 4 and 5 made of cotton-like pulp or synthetic pulp interposed between two and three, an intermediate sheet 6 disposed so as to be in contact with the back surface of the skin contact member 3, and a substantially side of the absorber 4 Consists mainly of a pair of left and right three-dimensional gathers BS, BS provided in a predetermined section in the front-rear direction so as to include at least a body fluid discharge part and having an edge as a standing base end, and absorbing Around the body 4, the outer edge portions of the liquid-impermeable back sheet 2 and the skin contact member 3 are joined at the upper and lower edge portions thereof by an adhesive such as hot melt or an adhesive means such as heat seal. Absorbed at both edges The liquid-impervious backsheet 2 extending to the side of 4 and the side nonwoven fabric 7 forming the three-dimensional gather BS are joined together by an adhesive such as hot melt or an adhesive means such as heat seal. Wing-like flaps W, W projecting sideways are formed by the laminated sheet portion of the liquid-impermeable back sheet 2 and the side nonwoven fabric 7, and the second wing-like flap is formed at a portion located on the heel side from this. WB and WB are formed.

  As the liquid-impermeable back sheet 2, a sheet material having at least water shielding properties such as polyethylene is used, but in recent years, a material having moisture permeability tends to be used from the viewpoint of preventing stuffiness. The water- and moisture-permeable sheet material is a microporous material obtained by melting and kneading an inorganic filler in an olefin-based resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. A sheet is preferably used. One or a plurality of adhesive layers (not shown) are formed on the non-use surface side (outer surface) of the liquid-impermeable back sheet 2 so that the sanitary napkin 1 is fixed to the underwear when worn on the body. It has become. As the liquid-impermeable back sheet 2, a polylaminated nonwoven fabric in which a plastic film and a nonwoven fabric are laminated may be used.

  The absorbent bodies 4 and 5 may be any one that can absorb and retain body fluids. Usually, a fluffy pulp mixed with a water-absorbing polymer powder is preferably used from the viewpoint of absorption function and price. The absorbent bodies 4 and 5 are preferably surrounded by packaging sheets 4L and 5L such as crepe paper for holding the shape and polymer powder. In the illustrated example, the upper layer absorbent body 5 is provided along the center in the width direction on the upper side of the lower layer absorbent body 4, but the upper layer absorbent body 5 and its packaging sheet 5L are omitted, and only the single absorbent body 4 is used. For example, a known absorber structure can be adopted.

  In the illustrated example, the intermediate sheet 6 is folded into a cylindrical shape to have a two-layer structure, but may be a single-layer structure without being folded. The intermediate sheet 6 may be provided over the entire skin contact surface, but is preferably provided only in the center in the width direction and in the front-rear direction intermediate portion (particularly the crotch portion). The material of the intermediate sheet 6 may be any material having liquid permeability, but a material having hydrophilicity is preferable. Specifically, by using recycled fibers such as rayon and cupra, natural fibers such as cotton, the material itself has hydrophilicity, or synthesis of olefins such as polyethylene or polypropylene, polyesters, polyamides, etc. The fiber which surface-treated with the hydrophilizing agent and provided the hydrophilic property can be used. The intermediate sheet 6 is desirably bonded to the back surface of the skin contact member 3 by hot melt or heat fusion (emboss).

In the illustrated example, the skin contact member 3 is slightly wider than the width of the absorbent body 4, and only stops covering the absorbent body 4. Is covered with a side nonwoven fabric 7 (a member different from the skin contact member) extending from the surfaces of both sides of the. A portion on the center side in the width direction of the side nonwoven fabric 7 forms a three-dimensional gather BS. As the side non-woven fabric 7, a non-woven fabric material subjected to appropriate water repellent treatment or hydrophilic treatment can be used according to the purpose of preventing menstrual blood or vaginal discharge from penetrating or enhancing touch feeling. . The side nonwoven fabric 7 can be made of natural fiber, synthetic fiber, regenerated fiber, or the like and formed by an appropriate processing method. Preferably, the side nonwoven fabric 7 eliminates the feeling of stickiness and prevents stuffiness. For this reason, it is preferable to use a non-woven fabric with reduced basis weight and air permeability. Specifically, it is desirable to use a nonwoven fabric prepared with a basis weight of 18 to 23 g / m ² , and in order to prevent permeation of body fluids reliably, a silicone-based or paraffin-based water repellent is coated. The water-repellent treated non-woven fabric is preferably used.

  As shown in FIGS. 2 and 3, the side nonwoven fabric 7 is a range from the inner side position of the absorbent body 4 to the outer edge of the liquid-impervious backsheet 2 slightly beyond the intermediate side position of the absorbent body 4 from the widthwise intermediate portion. A pair of left and right wing flaps W are bonded to the absorbent body side portion substantially corresponding to the body fluid discharge portion by the laminated sheet portion of the side nonwoven fabric 7 and the liquid-impermeable back sheet 2. , W are formed, and second wing-shaped flaps WB, WB are formed at the buttock side position. These wing-shaped flaps W, W and the second wing-shaped flaps WB, WB are respectively provided with adhesive layers 12 ... 13, and the wing-shaped flaps W, W are at the position of the folding line RL when mounted on the shorts. It is folded back to the opposite side, wrapped around the crotch part of the shorts and fastened.

  On the other hand, while the inner side part of the side nonwoven fabric 7 is folded back substantially double, a thread-like elastic elastic member 19 in which both ends or appropriate positions in the longitudinal direction are fixed to the middle portion in the height direction inside the double sheet. And a plurality of, in the illustrated example, two thread-like elastic elastic members 20 and 20 are arranged at both ends or at appropriate positions in the longitudinal direction at the upper portion of the thread-like elastic elastic member 19. Has been. As shown in FIG. 3, the double sheet portion is bent and laminated on the absorbent body 4 side in a state of being folded in a Z-shaped cross section, thereby bending the portion where the elastic elastic member 19 is disposed. As a point, three-dimensional gathers BS and BS standing on the surface side are formed while forming a pocket with an opening facing inward in a cross-sectional shape.

  On the other hand, in the sanitary napkin 1, as shown in detail in FIG. 4, on the use surface side of the lower layer absorbent body 4, an annular shape that is elongated in the longitudinal direction of the napkin and closed in the circumferential direction at the center in the width direction. In the region defined by the embossed recess 8, a mid-high portion is formed by the upper layer absorbent body 5 that is raised to the use surface side with respect to the surroundings. The embossed recess 8 is formed so as to bite from the surface of the skin contact part member 3 into the absorber 4. If the thickness of the middle-high part is too thick, the rigidity of the lower layer absorbent body 4 is increased and the adhesion to the body is lowered, so that it is preferably 3 to 20 mm, preferably 5 to 15 mm. Moreover, the embossing recessed part 9,10,11 is formed in the use surface side with the embossed recessed part 8, respectively.

  On the outer side of the middle and high portions 6, rear side embossed recesses 10, 10 extending in the longitudinal direction of the napkin 1 are formed on both sides of the rear portion of the embossed recess 8 with a predetermined distance from the embossed recess 8. In the illustrated example, each of the rear side embossed recesses 10 is an arcuate curve having a center of curvature on the outside of the napkin 1. A rear end independent emboss 11 having a substantially inverted umbrella shape is formed on the rear side of the embossed recess 8 with a predetermined distance from the embossed recess 8.

<About features>
The skin contact member 3 forms a skin contact surface 3F that is a portion covering the surface side of the absorbers 4 and 5, and is characteristically a mesh sheet in which a resin mesh sheet 31 is exposed on the surface. It has a portion 3M and a nonwoven fabric portion 3N that does not overlap the mesh sheet 31 and is made of the nonwoven fabric 32. The positions, numbers, shapes, dimensions, and the like of the mesh sheet portion 3M and the nonwoven fabric portion 3N can be determined as appropriate. For example, either one or both can be provided at a plurality of locations on the skin contact surface.

  In the example of illustration, the nonwoven fabric 32 which makes a nonwoven fabric part is provided over the whole main absorption area | region defined by the skin contact surface, and the width direction both sides in the surface of this nonwoven fabric 32, and the intermediate part of the intermediate part located between them are provided. The portion excluding both ends in the front-rear direction (or the whole) may be covered with the mesh sheet 31, and both sides may not be covered with the mesh sheet 31, and the mesh sheet may be covered with the portion of the nonwoven fabric 32 covered with the mesh sheet 31. The portion 3M is configured, and the non-woven fabric portion 3N is configured by a portion not covered with the mesh sheet 31. In this case, the width of the mesh sheet portion 3M is preferably about 30 to 80 mm, and the width of the nonwoven fabric portion 3N protruding on both sides thereof is preferably about 10 to 60 mm. Similar arrangement can be made by disposing the non-woven fabric 32 on the surface side of the mesh sheet 31 contrary to the illustrated embodiment.

As the mesh sheet 31, as long as it contains titanium oxide, a known top sheet of an absorbent article can be used without particular limitation. However, the thickness is 0.01 to 0.2 mm, and the area of each opening is 0. One having a thickness of 0.01 to ¹ mm ² , an opening ratio of 15 to 50%, and a titanium oxide content of 2% by weight or more (particularly 2 to 3% by weight) is preferable. As the raw material resin for the mesh sheet, an olefin resin such as polyethylene or polypropylene can be suitably used.

On the other hand, as the nonwoven fabric 32, one containing titanium oxide and having a content within a range of ± 50% with respect to the titanium oxide content of the mesh sheet is used. A particularly preferred range is ± 20%. Within this range, the difference in appearance between the nonwoven fabric portion and the mesh sheet portion after absorption is small. More specifically, the nonwoven fabric 32 preferably has a fiber basis weight of 10 to 50 g / m ² (particularly 15 to 40 / m ² ) and the constituent fiber has a titanium oxide content within the above range. . When the titanium oxide content in the mesh sheet portion 3M and the non-woven fabric portion 3N is sufficiently high and has sufficient fiber basis weight, the opacity is increased and the excretion of the excretory fluid absorbed on the back side is also excellent. If the fiber basis weight or titanium oxide content is too low, the concealing property will be inferior, and if it is too high, the concealing property will not change, but if the fiber basis weight in the nonwoven fabric portion 3N is too high, excrement fluid will be retained. There is a problem that it becomes easy to do. As long as this is the case, the specifications of the nonwoven fabric 32 can be determined as appropriate. For example, synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters and polyamides, regenerated fibers such as rayon and cupra, and natural fibers such as cotton are used as raw materials. Long fiber or short fiber nonwoven fabric obtained by an appropriate processing method such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air-through method, or a point bond method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. When the skin contact member 3 has a large number of through-holes, menstrual blood, urine and the like (hereinafter collectively referred to as body fluid) are quickly absorbed, and the dry touch property is excellent. . In particular, the thermal bond method is suitable from the viewpoint of softness and absorption speed.

  In order to further improve the concealability of the nonwoven fabric portion 3N, it is one preferred embodiment to emboss a predetermined pattern on the nonwoven fabric portion 3N as shown in the figure. When the pattern 40 is formed by such embossing, the camouflage effect of the pattern 40 improves the concealment property of the excretory fluid and makes the touch smooth like a mesh sheet. Although the embossing pattern 40 can be determined as appropriate, the area of the embossing pattern (uneven portion) 40 is preferably about 20 to 100% of the area of the nonwoven fabric portion 3N. The embossed pattern 40 may be a dot-like pattern, but may be a geometric pattern combining a circle, a triangle, a rectangle, or the like, or a pattern such as a floral pattern.

  As shown in the figure, when the mesh sheet 3M and the nonwoven fabric portion 3N have an overlap portion between the mesh sheet portion 3M and the nonwoven fabric portion 3N and in the vicinity thereof, the range including the overlap portion 33 is included. In the state where the mesh sheet 31 and the non-woven fabric 32 are overlapped, it is preferable to emboss the above-described concealing property to integrate the members 31 and 32 together. In this case, it is preferable to weld both members by so-called heat embossing. When such embossing is applied, the mesh sheet portion 3M and the nonwoven fabric portion 3N are difficult to peel off at the boundary between them, and a sense of incongruity (especially a foreign body sensation) occurs due to the edge of the material hitting the skin. It becomes difficult. Moreover, since the change of the touch from the mesh sheet part 3M to the nonwoven fabric part 3N becomes loose, it is hard to generate a sense of incongruity.

On the other hand, in order to further reduce the retention of excretion fluid in the nonwoven fabric portion 3N, it is also preferable that the nonwoven fabric portion 3N is constituted by a water-repellent nonwoven fabric 32 having through holes 32h penetrating in the front and back directions, as shown in FIG. It is a form. By using the perforated water-repellent nonwoven fabric 32 as described above, the excretion liquid easily moves from the nonwoven fabric portion 3N to the absorbent body 4 side, that is, the absorption speed of the nonwoven fabric portion 3N is increased. As a result, it becomes difficult for the excretory liquid to be retained in the nonwoven fabric portion. In this case, the opening area of each of the through holes 32h is preferably about 0.01 to 100 mm ² , and a large number are preferably arranged so as to occupy about 10 to 50% of the area of the nonwoven fabric portion 3N. The water repellent nonwoven fabric 32 can be manufactured by subjecting a normal nonwoven fabric to a water repellent treatment such as silicon treatment.

  Moreover, when the absorber 4 contains a superabsorbent polymer, in order to further reduce the retention of excretory fluid in the nonwoven fabric portion 3N, the absorption rate is 0 as a superabsorbent polymer contained in the portion overlapping the nonwoven fabric portion 3N. When a fast one of about 1 to 5 g / g / sec (preferably 0.7 to 3 g / g / sec) is used, the absorption rate on the back side of the non-woven fabric portion 3N increases, and as a result, the excretion liquid is retained in the non-woven fabric portion 3N. It becomes difficult to be done.

Further, when the absorbent body 4 is formed of a fiber assembly containing pulp fibers, in order to further reduce the retention of excretion fluid in the nonwoven fabric portion 3N, the pulp fiber content in the portion overlapping the nonwoven fabric portion 3N is increased, Specifically, when the amount is about 200 to 600 g / m ² , the absorption on the back side of the nonwoven fabric portion 3N becomes difficult to be saturated, so that the excretion liquid is hardly held in the nonwoven fabric portion 3N.

Further, when the absorbent body 4 is formed of a fiber assembly, in order to further reduce the retention of excretion fluid in the nonwoven fabric portion 3N, the fiber density of the portion overlapping the nonwoven fabric portion 3N in the absorbent body 4 is reduced. Specifically, it is preferable that the fiber density is set to about 0.06 to 0.005 g / cm ^3, and the fiber density of the portion that does not overlap with the nonwoven fabric portion 3N is increased. In this case, since the fiber density of the part which overlaps the nonwoven fabric part 3N among the absorbers 4 is low, the absorption speed of the said part becomes quick and liquid retainability falls. Moreover, although the absorption amount of the part which overlaps with the nonwoven fabric part 3N becomes small, since the fiber density of the part which does not overlap with a nonwoven fabric part is relatively high, the absorption amount (retention fluid retention amount) as the absorber 4 whole is ensured. be able to.

Further, in order to reduce the retention of excretory fluid in the nonwoven fabric portion 3N, as shown in FIG. 4, a groove 50 is formed on the surface of the portion of the absorbent body 4 that overlaps with the nonwoven fabric portion 3N by embossing or the like. Is also preferable. When such a concave groove 50 is provided, the inside of the concave groove 50 becomes a receiving space for excretory liquid, and the absorption speed to the back side of the nonwoven fabric portion 3N is increased. Therefore, it becomes difficult for the excretion liquid to be held in the nonwoven fabric portion 3N. The concave groove 50 may be formed along the front-rear direction of the absorber or may be formed along the width direction. Although the dimension of the concave groove 50 can be determined as appropriate, the groove width is preferably about 1 to 20 mm. Further, the number of the concave grooves 50 may be one, but a plurality of the concave grooves 50 may be provided as illustrated.
Note that a plurality of liquid retention lowering means described above can be used in combination.

  INDUSTRIAL APPLICABILITY The present invention can be used for disposable absorbent articles in general such as sanitary napkins, panty liners, urine absorption pads, disposable diapers for absorbing menstrual blood, cages and the like.

It is an expanded view of a sanitary napkin. It is the cross-sectional view (II-II line arrow view of FIG. 1). It is the cross-sectional view (III-III arrow directional view of FIG. 1). It is a principal part expanded sectional view.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Impervious back sheet, 3 ... Skin contact member, 4 ... Lower layer absorber, 5 ... Upper layer absorber, 6 ... Intermediate sheet, 7 ... Side nonwoven fabric, 8 ... Embossed recessed part, 9 ... Front end independent emboss, 10 ... Rear side emboss, 11 ... Rear end independent emboss, 31 ... Mesh sheet, 32 ... Non-woven fabric, 40 ... Emboss pattern, BS ... Solid gather, W ... Wing-shaped flap, WB ... Buttocks side wing-shaped flap .

Claims (10)

In an absorbent article having an absorbent body and a liquid-permeable skin contact surface covering the surface side,
The skin contact surface is composed of a mesh sheet portion made of a resin mesh sheet, and a nonwoven fabric portion that does not overlap the mesh sheet and is made of a nonwoven fabric,
The mesh sheet portion and the nonwoven fabric portion contain titanium oxide, and the titanium oxide content of the nonwoven fabric portion is within a range of ± 50% with respect to the titanium oxide content of the mesh sheet portion.
An absorbent article characterized by the above. The mesh sheet has a thickness of 0.01 to 0.2 mm, an area of individual openings of 0.01 to ¹ mm ² , an opening ratio of 15 to 50%, and a titanium oxide content of 2% by weight or more. ,
The non-woven fabric of the non-woven fabric portion has a fiber basis weight of 10 to 50 g / m ² .
The absorbent article according to claim 1.   The absorbent article according to claim 1, wherein the nonwoven fabric portion is embossed with a predetermined pattern.   The mesh sheet forming the mesh sheet portion and the non-woven fabric forming the nonwoven fabric portion have an overlapping portion at least in the vicinity of the boundary between the mesh sheet portion and the nonwoven fabric portion, and the mesh sheet in the overlapping portion and the nonwoven fabric portion. The absorbent article according to claim 3, wherein the nonwoven fabric is integrated by embossing.   The absorptive article according to claim 1 in which said nonwoven fabric part consists of a water-repellent nonwoven fabric which has a penetration hole penetrated in the front and back direction.   The absorbent body is formed of an aggregate of pulp fibers containing a superabsorbent polymer, and the absorption rate of the superabsorbent polymer contained in the portion overlapping the non-woven fabric portion is 0.1 to 5 g / g / sec. The absorptive article according to any one of claims 1 to 5.   The absorbent body is formed by an aggregate of pulp fibers and non-pulp fibers having a lower hydrophilicity than this, and the pulp fiber content in the portion overlapping the nonwoven fabric portion is included in the portion overlapping the mesh sheet portion. The absorbent article according to any one of claims 1 to 6, wherein the absorbent article is greater than the pulp fiber content. The said absorber is formed with the fiber assembly, The fiber density of the part which overlaps with the said nonwoven fabric part among the said absorber is 0.06-0.005 g / cm < ³ >, Any one of Claims 1-7. Absorbent article according to item.   The absorbent article of any one of Claims 1-8 in which the ditch | groove is formed in the surface of the part which overlaps with the said nonwoven fabric part among the said absorbers. A nonwoven fabric forming the nonwoven fabric portion is provided over the entire main absorption region determined by the skin contact surface,
Among the both sides in the width direction on the surface of this nonwoven fabric and the intermediate part located between them, a part or the whole of the intermediate part is covered with the mesh sheet, and both side parts are not covered with the mesh sheet,
The portion of the nonwoven fabric covered by the mesh sheet forms the mesh sheet portion, and the portion not covered by the mesh sheet constitutes a skin contact surface as the nonwoven fabric portion.
The absorptive article according to any one of claims 1 to 9.

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