TW201536263A - Absorbent article - Google Patents

Abstract

The present invention relates to an absorbent article and the objective thereof is to provide an absorbent article which can favorably diffuse body fluids such as excreted urine in a longitudinal direction of a surface sheet, exhibits excellent intake of the body fluids diffused in the longitudinal direction, and allows less of the body fluids to pass back. In this absorbent article (1), a surface member (2) includes a central sheet member (21) and a pair of side sheet members (22, 23). The surface member (2) has a pair of first overlapping portions (A1) formed by overlapping the pair of side sheet members (22, 23) with the central sheet member (21) from a skin surface side. Each of the pair of first overlapping portions (A1) has a first joining portion (B1) that joins the central sheet member (21) and side sheet members (22, 23) and extends in a longitudinal direction (L), and first free edge portions (22a, 23a) of the side sheet members (22, 23), the first free edge portions (22a, 23a) extending along the first joining portion (B1) and protruding in a longitudinal axis direction (C).

Description

Absorbent article

The present invention relates to an absorbent article such as a disposable diaper, a urine absorbent pad, and the like.

An absorbent article disclosed in Patent Document 1 is an absorbent article such as a disposable diaper or a urine absorbing pad. The absorbent article is configured to be disposed on the skin of the absorbent core by three or more sheets extending in the longitudinal direction. The inner side sheet member on the face side. In the absorbent article, the edge portion on the inner side in the lateral direction of the sheet material on the outer side in the lateral direction is superposed on the lateral direction of the adjacent sheet material on the inner side in the lateral direction from the skin surface side. The outer side of the side is formed.

In the absorbent article disclosed in Patent Document 1, the inner sheet member is composed of three or more sheets, and the edge portion of each sheet is formed into two or more steps extending in the longitudinal direction, thereby promoting the fact that the absorbent sheet has been formed. The discharged urine spreads in the longitudinal direction.

Further, Patent Document 2 discloses an absorbent article in which a pair of left and right pleated sheets provided at both end portions in the width direction of the surface sheet are provided with a part of the surface sheet protruding and formed. For the protrusions. In the absorbent article, the surface sheet is composed of a single sheet continuous from one end to the other end in the width direction of the absorbent article, and the protruding portion is formed by partially folding the single sheet.

The absorbent article disclosed in Patent Document 2 is by The pair of left and right protruding portions are formed on the surface sheet, so that the strength of the discharged body fluid can be weakened, and the body fluid can be diffused in the longitudinal direction.

[Previous Technical Literature] [Patent Document]

[Patent Document 1] JP-A-2011-000279

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2004-351228

In the absorbent article in which the inner sheet member (surface sheet member) is composed of three or more sheets as in Patent Document 1, the sheet is generally a hot melt adhesive type (HMA) at a portion where the sheets overlap each other. ) Fully coated to join. However, when each sheet material is joined by the full application of such HMA, even if the body fluid such as urine that has been discharged reaches the overlapping portion, the HMA of the joint portion becomes an obstacle to the inhalation of the body fluid, and therefore, It is not easy to inhale the above body fluid and it is produced.

Further, as in Patent Document 2, an absorbent article in which a surface sheet is partially folded to form a projection is used as a body such as urine that has been discharged. When the liquid reaches the protruding portion, since the protruding portion is formed by partially folding a surface sheet composed of a single sheet material, the body fluid is sucked into the inside of the protruding portion, from the lower portion of the protruding portion. The side oozes in the width direction of the absorbent article, and the body fluid becomes less likely to diffuse toward the longitudinal direction of the absorbent article. In addition, even if the body fluid that has been sucked into the inside of the protruding portion does not ooze out from the lower side of the protruding portion and remains inside the protruding portion, there is a load such as a pressure, and the body fluid faces the skin surface side outside the protruding portion. Outflow (ie, reflux).

The present invention relates to absorbent articles, the purpose of which is to provide An absorbent article capable of diffusing a body fluid such as urine that has been discharged to the longitudinal direction of the surface sheet, and absorbing the body fluid that has diffused in the longitudinal direction, and the backflow of the body fluid is small. Absorbent items.

The present invention relates to an absorbent article comprising a liquid permeable surface member disposed on a skin surface side and an absorbent body disposed on a garment side of the surface member, wherein the absorbent member has a surface member and a width direction. a central sheet member disposed on a long axis of the absorbent article and extending in the longitudinal direction; and disposed on both side portions of the central sheet member in the longitudinal direction and extending in a longitudinal direction of the absorbent article In the pair of side sheet members, the surface member has a pair of first overlapping portions, and the pair of first overlapping portions include the pair of side sheet members being overlapped from the skin surface side The overlapping portion formed by the center sheet member extends in the longitudinal direction, and each of the pair of first overlapping portions has a first joint portion that joins the center sheet member and the side sheet member and extends in the longitudinal direction. And a first free edge portion of the side sheet member that protrudes in the longitudinal direction along the first joint portion.

According to the invention, the first free edge portion of the side sheet member can stand up and form a standing portion even in a state in which the absorbent article is unfolded, but it is easier to form the standing portion when the absorbent article is bent inward in the longitudinal direction. According to such a standing portion, the discharged body fluid can be favorably diffused in the longitudinal direction of the surface sheet, and the inhalation of the body fluid diffused in the longitudinal direction can be improved, and the backflow of the body fluid can be made small. .

1‧‧‧Absorbables

2‧‧‧Surface components

21‧‧‧Central sheet member

21a‧‧‧2nd Free Edge

21b‧‧‧2nd Free Edge

22‧‧‧one side sheet member

22a‧‧‧1st free edge

23‧‧‧The other side sheet member

23a‧‧‧1st free edge

3‧‧‧ absorber

31‧‧‧1st absorbent core

32‧‧‧2nd absorbent core

4‧‧‧ Back member

5‧‧‧ wrinkle forming members

5a‧‧‧ One side of the wrinkles forming a thin sheet

5b‧‧‧The other side of the wrinkle forming sheet

51‧‧‧ Elastomers

6‧‧‧Binder

A ₁ ‧‧‧1st repeat

A ₂ ‧‧‧2nd Repetition

B ₁ ‧‧‧1st joint

B ₂ ‧‧‧2nd joint

C‧‧‧Long axis of absorbent articles

G‧‧‧Three-dimensional wrinkles

L‧‧‧ Length direction

W‧‧‧Width direction

Fig. 1 is a plan view showing a state in which an absorbent article according to an embodiment of the present invention is unfolded.

Figure 2 is a cross-sectional view taken along line XX' of the absorbent article of Figure 1.

Fig. 3 is a partial perspective view showing the vicinity of a first overlapping portion of the absorbent article according to the embodiment of the present invention.

Figure 4 is a first section of the absorbent article according to an embodiment of the present invention. A partial oblique view of the width direction near the repeating portion.

Fig. 5 is a schematic view showing the action of the second free edge portion of the center sheet member.

Fig. 6 is a cross-sectional view showing an absorbent article according to another embodiment of the present invention (an embodiment in which each side sheet member is composed of two sheets).

Hereinafter, a preferred embodiment of the absorbent article according to the present invention will be described with reference to the drawings.

Fig. 1 is a plan view (expanded plan view) showing a state in which the absorbent article 1 according to the embodiment of the present invention is unfolded, and Fig. 2 is a cross-sectional view taken along line XX' of Fig. 1. The absorbent article 1 has a long viewing angle in the longitudinal direction L in a planar view in a developed state, and has respective regions of the abdominal side region 11, the crotch region 12, and the back side region 13 along the longitudinal direction L. Here, the abdominal side region 11 and the back side region 13 are regions corresponding to the front waist portion (abdomen) and the waist rear portion (hip portion) of the wearer, and the crotch region 12 is located in the abdominal side region 11 A region corresponding to the aforementioned back side region 13 and corresponding to the wearer's crotch portion.

Further, the absorbent article 1 has a belt-shaped central region 14 including the long axis C of the absorbent article 1 and extending over the entire length L of the absorbent article 1 in a planar view of the unfolded state; and the absorbent article Two of the aforementioned central regions 14 in the width direction W of 1 On the side, the side regions 15, 16 which are the remaining regions other than the central region 14 are formed. In addition, the width direction W of the absorbent article 1 means a direction orthogonal to the longitudinal direction L of the absorbent article 1 in a plane view angle in a state in which the absorbent article 1 is unfolded.

The central region 14 is a urine that can be discharged, etc. The length of the body fluid to be diffused in the width direction W (that is, the width of the central region 14) can be appropriately selected depending on the form, size, and the like of the object to which the absorbent article 1 is applied, but generally has the width direction of the absorbent article 1. The length of 1/3 or more of the total length of W.

If the shape of the absorbent article 1 is in an unfolded state The shape in which the plane angle of view is long in one direction is not particularly limited, and may be a gourd shape as shown in FIG. 1 or a shape other than a gourd shape such as a rectangular shape such as a rectangular shape, an elliptical shape, or an oblong shape.

Moreover, the absorbent article 1 is as shown in FIGS. 1 and 2, There is a laminated structure including the surface member 2, the absorber 3, the back member 4, and the corrugated molded member 5.

The surface member 2 is disposed in the thickness of the absorbent article 1 A liquid-permeable sheet member that is in direct contact with the wearer's skin surface on the skin side of the direction. In the present embodiment, the surface member 2 includes a center sheet member 21 which is disposed on the long axis C of the absorbent article 1 and which is formed to be long in the longitudinal direction L, and is disposed in the longitudinal direction L of the center sheet member 21, respectively. Both side portions and a pair of side sheet members 22, 23 are formed long in the longitudinal direction L.

If the central sheet member 21 is a liquid-permeable sheet member It is not particularly limited, and any sheet member can be used. The center sheet member of the present invention is, for example, a nonwoven fabric or a woven fabric, and is preferably a non-woven fabric from the viewpoints of cushioning properties, skin feel, versatility, and the like. Further, as the non-woven fabric, any non-woven fabric which is commonly used in the technical field such as hot air non-woven fabric, water needle non-woven fabric, spunbonded non-woven fabric, heat-fusible non-woven fabric, melt-blown non-woven fabric, and needle-punched nonwoven fabric can be used.

The basis weight of the center sheet member 21 is not particularly limited, and any basis weight may be employed. The basis weight of the central sheet member of the present invention is desirably 10 g/m ² to 100 g/m ² , and more desirably 20 g/m ² to 50 g/m ² . When the basis weight is less than 10 g/m ² , sufficient surface strength cannot be obtained, and breakage occurs in use, and when it exceeds 100 g/m ² , excessive stiffness is generated, causing wearer to cause Uncomfortable feelings, foreign body sensation, etc. occur.

The structure of the center sheet member 21 is not particularly special if it is a sheet shape. Limitations can be made to a sheet member having any thickness and any surface configuration. The thickness of the center sheet member of the present invention is, for example, in the range of 0.001 mm to 5.0 mm, preferably 0.01 mm to 3.0 mm, more preferably 0.1 mm, from the viewpoints of moderate liquid permeability, cushioning property, and skin feel. ~1.0mm. The central sheet member of the present invention preferably has a structure in which a plurality of convex portions are formed on at least the surface of the skin surface side. When the center sheet member has such a configuration, when the center sheet member is joined to the side sheet member, the joint portion of the center sheet member is crushed by the fluffiness of the convex portion by the pressure of the joint, Further, in a region closer to the long axis side than the joint portion, since the convex portion has a high bulkiness, the free edge portion extending in the longitudinal direction of the side sheet member becomes Easy to stand up. The convex portion is not particularly limited as long as it can exhibit such an effect, and may have any structure. For example, it may be a raised portion (a ridge portion) extending in the longitudinal direction, or may have a ridge line with a circular arc. A flat cuboid or a truncated quadrangular pyramid, a pyramidal shape with a vertex rounded (for example, a triangular pyramid shape, a quadrangular pyramid shape, or the like), a conical shape with a vertex, and an arch shape. In addition, the structure of the portion other than the convex portion is not particularly limited, and the groove portion may be a flat portion, and the convex portion may be formed as a plurality of raised portions extending in the longitudinal direction, for example, and the convex portion may be formed. The other portion is a ridge groove structure or the like formed by a plurality of groove portions extending in the longitudinal direction. In addition, the center sheet member of the present invention can have one or a plurality of grooves extending in the longitudinal direction on at least the surface on the skin surface side. When the central sheet member has such a configuration, it is possible to promote the diffusion of the body fluid such as urine that has been discharged in the longitudinal direction, and to improve cushioning properties, skin feel, and the like.

Further, the center sheet member of the present invention is disposed in an absorbent article It is preferred in the aforementioned central region of the product. When the center sheet member is disposed in the central region, the body fluid such as urine that has been discharged is easily introduced into the garment side disposed on the surface member via the center sheet member (that is, the skin side of the wearer) As a result, since the body fluid does not easily reach the end portion of the absorbent article in the width direction W, the body fluid in the width direction W of the absorbent article can be reduced (the body liquid leakage from the width direction W of the absorbent article) That is, side leakage).

In the present embodiment, the side sheet members 22 and 23 are not particularly limited as long as they have a liquid permeable sheet member, and the same sheet member as the center sheet member 21 can be used. An ideal sheet member as the side sheet member of the present invention is, for example, a nonwoven fabric having a basis weight of 10 g/m ² to 30 g/m ² . However, as described later, since the end edge on the long axis side in the width direction W of the side sheet member is a free edge portion, the free edge portion stands up to form a standing portion, and therefore it is necessary to consider the longitudinal direction L of the discharged body fluid. The diffuseness, the touch of the wearer's skin, etc., the basis weight, thickness, structure, material, etc. are selected.

Moreover, in this embodiment, it is arrange|positioned in the absorbent article 1. The liquid permeability of the central sheet member 21 in the central region 14 is preferably higher than that of the side sheet members 22, 23. In the present invention, when the liquid permeability of the center sheet member is higher than that of the side sheet member, the body fluid shutoff stopping effect of the standing portion formed by the first free edge portion to be described later can be increased, so that the arrangement is facilitated. The body fluid absorption of the absorbent body in the central region on the garment side of the surface member can more effectively prevent lateral leakage of the body fluid.

In the present invention, the absorbent system is disposed on the surface member of the garment The side absorbs body fluids such as urine contained in the surface member and moisture contained in the feces. In the present embodiment, the absorbent body 3 has a two-layer structure including a first absorbent core member 31 that forms a layer on the skin surface side and a second absorbent core member 32 that forms a layer on the garment side.

The absorbent core members 31 and 32 are not particularly limited as long as they have a function of absorbing and retaining a body fluid such as urine that has been discharged, and any absorption that has been conventionally used for paper diapers or the like can be used. Elements. In general, when considering the water absorbing property, the comfort during installation, and the like, the core material of the absorbent core material is high in bulkiness, is not easily broken in shape, and has less chemical stimuli. As the absorbent core material of the present invention, for example, a fiber-based material including a pile pulp, a spunbonded nonwoven fabric, an air-laid nonwoven fabric, a thermoplastic fiber, and the like is covered by a core wrap composed of a liquid-permeable sheet and A polymeric core element of a polymeric absorbent such as a superabsorbent polymer (SAP). Further, the absorbent core member may not include a superabsorbent polymer, and for example, a core material may be used as the absorbent core only if the core material is coated with the core material. In addition, as the core material-clad layer, a liquid-permeable sheet such as a tissue paper having a basis weight of about 10 to 30 g/m ² , a liquid-permeable non-woven fabric, or a hydrophilic nonwoven fabric is exemplified.

The configuration of the aforementioned absorbent core members 31, 32 is not particularly limited. Any constructor can be used. The absorbent core materials of the present invention may have the same structure as each other or may have different configurations. In the case where the absorbent core members are configured to be different from each other, one of the absorbent core members is disposed in a region corresponding to the central sheet member of the absorbent article at a planar viewing angle in a state in which the absorbent article is unfolded. It is preferable that the other absorbent core material is formed to be longer (that is, wide) in the width direction W than the absorbent core of one of the foregoing. When the structure is such a structure, the thickness of the portion of the absorber corresponding to the central sheet member becomes thicker, and the basis weight of the portion becomes larger than the basis weight of the other portion. Therefore, the absorption capacity of the absorber can be concentrated. a portion corresponding to the aforementioned central sheet member of the aforementioned absorbent article. As a result, the amount of body fluid absorption of the portion of the absorbent body corresponding to the central sheet member is increased, so that the lateral leakage of the body fluid is reduced, so that the contaminated area caused by the body fluid can be reduced.

Moreover, from the viewpoint of preventing lateral leakage of body fluids, etc. As shown in FIG. 1, the absorbent core material of at least one of the first absorbent core material and the second absorbent core material is formed into a gourd shape in a planar view from the state in which the absorbent article 1 is unfolded.

Furthermore, in the present embodiment, the absorber 3 has two The absorbent article of the present invention is not limited to such a structure, and may have a single layer structure using one absorbent core material, or may have three or more layers. A multilayer structure composed of a laminate of absorbent core materials. Even in the case of having such a single-layer structure or a multilayer structure, in the same manner as the above-described two-layer structure, the absorbent core material is used in order to make the basis weight of the portion of the absorbent body corresponding to the central sheet member larger than that of the other portions. The thickness and/or the number of layers of the portion corresponding to the central sheet member are preferably larger than the thickness and/or the number of layers of the other portions.

In the present embodiment, the back member 4 is a liquid-impermeable sheet disposed on the garment side of the absorbent body 3. The liquid-impermeable sheet constituting the back surface member of the present invention is not particularly limited as long as it is liquid-impermeable to a body fluid such as urine, and can be used as a liquid-impermeable sheet such as a disposable diaper. Any sheet material. This liquid-impermeable sheet is not only liquid-impermeable to body fluids such as urine but also has air permeability. Examples of such a liquid-impermeable sheet include a liquid-impermeable synthetic resin film such as polyethylene having a basis weight of about 15 to 25 g/m ² , and a basis weight of about 10 to about 30 g/m. A non-woven fabric such as an SMS non-woven fabric having ² water-repellent synthetic fibers and a laminated sheet having a liquid-impermeable synthetic resin film.

In the present embodiment, the wrinkle forming member 5 has: a configuration The pair of wrinkle forming sheets 5a and 5b are formed on both sides in the width direction W of the skin surface side of the surface member 2, and are formed in the longitudinal direction L of the absorbent article 1; and the wrinkle forming sheet 5a is disposed on the both sides An elastic body 51 such as a rubber thread in a space formed by folding the end portion on the long axis C side of 5b. The wrinkle forming member is configured such that when the absorbent article is bent inward, the end portion on the long axis side of the wrinkle forming sheet is raised by the contraction force of the elastic body to form the three-dimensional gathers G. By the three-dimensional wrinkles G, it is possible to more effectively prevent the excretion of excreted urine, feces, and the like from leaking from the absorbent article.

In addition, the pleated sheets 5a and 5b are not particularly limited as long as they are hydrophobic or liquid-impermeable, and any conventional three-dimensional pleated sheet such as a disposable diaper can be used. Sheet material. Examples of the hydrophobic or liquid-impermeable sheet material constituting the wrinkle-forming sheet of the present invention include a spunbonded nonwoven fabric having a basis weight of from about 10 to about 40 g/m ² , a dot-bonded nonwoven fabric, and an SMS nonwoven fabric. A liquid-impermeable synthetic resin film and a laminate of the materials.

Hereinafter, the absorption of this embodiment will be described in further detail. The structure of the surface member 1 of the article 1.

As shown in Fig. 1 and Fig. 2, in the absorbent article 1 of the present invention, the center sheet member 21 is formed on both side portions in the longitudinal direction L of the center sheet member 21, and the length of the pair of side sheet members 22, 23 is long. Each side of the axis C side overlaps from the skin side. Further, the first overlapping portion A ₁ of the center sheet member 21 and the respective side sheet members 22 and 23 are overlapped on the edge side of each side portion on the long axis C side of the side sheet members 22 and 23 The first free edge portions 22a and 23a are formed, and are joined to each other at a portion separated from the edge of each of the side portions.

FIG 3 based the absorbent article near the first repeat unit A ₁ E ₁ a perspective view of part of FIG. 1, FIG. 4 along a line off the first repetition section portion of the absorbent article A ₁ E 1 in the vicinity of the width direction W ₂ of Surface map. As shown in FIG. 3 and FIG. 4, each of the first free edge portions 22a and 23a is inclined toward the long axis C side of the absorbent article 1 when the absorbent article 1 is bent inward in the longitudinal direction L. The state rises and forms a standing position. In addition, when the body fluid such as urine is discharged, the standing body is blocked from the body fluid flowing in the width direction W on the skin surface side of the surface member 2, so that the width of the absorbent article 1 can be effectively prevented. Leakage in direction W (ie lateral leakage).

Further, since this portion of the base stand, the sheet member 21 and the center of the side portions 22 and 23 of the first sheet engaging member B ₁ along the longitudinal direction L of the absorbent article 1 is formed, and therefore, has been possible to The discharged body fluid diffuses in the longitudinal direction L along the first joint portion B ₁ . Further, since the rising portion is the boundary, the side opposite to the long axis C side of the surface member 2 is discontinuous, so that the diffusion of the body fluid in the width direction W is suppressed by the discontinuous portion, and as a result, The diffusion of the body fluid into the longitudinal direction L can be further promoted. Further, when the body fluid is diffused in the longitudinal direction L, the body fluid can be absorbed by using a wide surface of the absorbent body 3 disposed on the garment side of the surface member 2, so that the body fluid can be greatly increased toward the absorbent body 3. Absorption rate.

Further, the first free edge portions 22a and 23a are formed by the first free edge portions 22a and 23a. The erected portion is constituted by one side sheet member 22, 23 (ideally, the side sheet members 22 and 23 made of non-woven fabric), so that it is possible to prevent the body fluid from remaining in the standing portion and to reduce the adhesion of the body fluid to the wearer. The skin of the user, as a result, keeps the wearer's skin clean.

The length W _{F of the} first free edge portions 22a and 23a in the width direction W is not particularly limited as long as the first free edge portions 22a and 23a can exhibit the above-described effects, and can be formed to have an arbitrary width. For example, the W _F of the width direction W of the first free edge portion of the present invention is in the range of 1 mm to 20 mm from the viewpoint of the effect of stopping the discharge of the body fluid that has been discharged, the wearing feeling of the wearer, and the like. It is preferably in the range of 3 mm to 15 mm, more preferably in the range of 4 mm to 10 mm.

Further, the length W _F of the width direction W of the first free edge portion is preferably in the entire length of the longitudinal direction L of the absorbent article. When the length W _F of the width direction W of the first free edge portion is constant over the entire length L of the absorbent article, when the discharged body fluid flows on the skin surface side of the surface member, the use The standing portion formed by the first free edge portion having a constant width can equally stop the body fluid at any position in the longitudinal direction L of the absorbent article, thereby achieving stable lateral leakage prevention. Features.

In the present invention, the length W _F of the width direction W of the first free edge portion and the form of the rising portion can be adjusted by the form of the first joint portion of the first sheet member and the first overlap portion of the side sheet member. . For example, the first joint portion may have a linear viewing angle along the longitudinal direction L in a plane view angle in a state in which the absorbent article is unfolded. When the first joint portion is formed in a straight line shape, the base portion of the rising portion formed by the first free edge portion is linear, so that the discharged body fluid is on the skin surface side surface of the surface member. When the fluid flows upward, the body fluid is stopped in a straight line, and the body fluid can be stopped at the same position in the width direction W in the longitudinal direction L of the absorbent article, so that the lateral leakage of the body fluid can be more effectively suppressed. Further, the linear first joint portion has an advantage that the body fluid that is stopped by the joint portion can be easily smoothly diffused in the longitudinal direction L.

Further, the first joint portion can be used as an absorbent material The plane viewing angle of the state in which the product is unfolded is a non-linear shape such as a wave shape or a shape in which a spiral is projected on a plane along the longitudinal direction L. When the first joining portion is formed in a non-linear shape, the base portion of the rising portion formed by the first free edge portion is non-linear, so that the discharged body fluid flows on the skin surface side of the surface member. In the upper direction, the position in the width direction W in which the body fluid is stopped can be stopped along the longitudinal direction L of the absorbent article. Therefore, it is possible to suppress the diffusion of the body fluid in the width direction W, and to use the surface member. The wide range of the absorbent body on the garment side absorbs the body fluid efficiently. In addition, when the first free edge portion is erected, the first joining portion is formed in a non-linear shape, and the wrinkle portion is easily formed in the rising portion. Therefore, cushioning property, skin feel, and the like can be improved.

The length W _{B of the} first joining portion B _{1 in} the width direction W is not particularly limited, and can be formed to have an arbitrary width. In the present invention, the length W _B of the first joining portion in the width direction W is, for example, in the range of 1 mm to 10 mm, preferably in the range of 1.5 mm to 6 mm, and more preferably in the range of 2 mm to 4 mm. In addition, the length W _{F of the} first free edge portion in the width direction and the width of the first joint portion are from the viewpoint of the stoppage effect of the discharged body fluid, the joint strength, the ease of suction of the body fluid, and the like. than the longitudinal direction of W _B to W (W _F / W _B) is preferably 5/3 or more.

In the present invention, the first joint portion and the second joint to be described later are formed The joining means of the joint portion is not particularly limited, and any means known in the art can be employed, and examples thereof include an adhesive using a hot melt adhesive type (HMA), a means of hot melting such as hot embossing, and the like. It is preferable to use an adhesive agent, and it is preferable to use HMA, it is preferable to use an adhesive agent from the viewpoint of the effect of the stoppage of the body fluid which has already been discharged, the joint strength is excellent, etc., and the adhesive means of the first joint portion and the second joint portion.

The surface member of the present invention can be applied as described above. Any of the conventional means has been produced, for example, by being coated in the longitudinal direction L by a portion separated from the end edges of the respective side portions in the upper surface of each side portion of the longitudinal direction L of the center sheet member. An adhesive such as HMA is produced by laminating the side portions on the long axis C side of the pair of side sheet members on the applied adhesive. Moreover, the absorbent article of the present invention can be manufactured by any conventional manufacturing process other than the manufacturing process of the surface member, and therefore, it is easy to carry out without requiring special manufacturing equipment and complicated manufacturing processes. Manufacturing.

Further, in the present embodiment, as shown in FIG. 2 and FIG. 4, lines 21 to the central sheet member of the second free edge is formed at the portion A _1, each side edge in the longitudinal direction L of the side portions of the first repetition section 21a and 21b are joined to the side sheet members 22 and 23 at a portion separated from the edge of the both side portions. Fig. 5 is a schematic view showing the action of the second free edge portion of the center sheet member. As shown in FIG. 5, when the second free edge portions 21a and 21b are formed on the edge sides of both side portions in the longitudinal direction L of the center sheet member 21, the body fluid U such as urine that has been discharged is transmitted through the surface member 2 After the absorption of the absorbent body 3, the body fluid U' absorbed by the absorbent body 3 oozes toward the surface member 2 side due to the load of the pressure, the absorption capacity of the absorbent body 3, or the like, and the central sheet member 21 can be used. The second free edge portions 21a and 21b on both sides in the longitudinal direction L prevent the body fluid U' from flowing out toward the skin surface side of the surface member 2 (so-called backflow), so that the body fluid U' can be prevented from adhering to the wear. The skin of the person, as a result, keeps the wearer's skin clean.

The length W _F′ of the width direction W of the second free edge portions 21 a and 21 b is not particularly limited as long as the second free edge portions 21 a and 21 b can exhibit the above-described functions, and can be formed to have an arbitrary length. For example, the length W _F′ of the width direction W of the second free edge portion of the present invention is in the range of 1 mm to 20 mm which is approximately the same as the length W _F of the width direction W of the first free edge portion, and is preferably 3 mm to 15 mm. Within the range, it is more preferably in the range of 4 mm to 10 mm. Moreover, the length W _{F '} of the width direction W of the second free edge portion and the width direction W of the first joining portion are from the point of the backflow suppressing effect of the body fluid absorbed by the absorber, the joint strength, and the like. The ratio of the length W _B (W _F' /W _B ) is preferably 5/3 or more.

Moreover, in the present embodiment, the surface member 2 is composed of one piece. Total 3 of the central sheet member 21 and the two side sheet members 22, 23 Although the sheet member of the sheet is constituted, the present invention is not limited to such a configuration, and the surface member may be constituted by four or more sheet members.

Fig. 6 is a cross-sectional view showing an absorbent article according to another embodiment of the present invention in which each of the side sheet members 22 and 23 is composed of two sheets 221, 222, 231, and 232, respectively. As shown in FIG. 6, each of the side sheet members 22 and 23 is formed by arranging four sheets 221, 222, 231, and 232 extending in the longitudinal direction L of the absorbent article 1 in the width direction W. . In the above-described four sheets 221, 222, 231, and 232, the two sheets 221 and 231 located on the long axis C side of the absorbent article 1 are on the side opposite to the long axis C side. In each of the side portions, the side portions on the long axis C side of the other two sheets 222 and 232 adjacent to each other on the side opposite to the long axis C side are overlapped from the skin surface side. Further, the second overlapping portions A ₂ of the two sheets 221 and 231 located on the side of the long axis C and the other two sheets 222 and 232 on the side opposite to the long axis C side are arranged in order to The third free edge portions 222a and 232a are formed on the end edges of the side portions of the two sheets 222 and 232 on the side opposite to the long axis C side, and are separated from the end edges of the respective side portions. Engage each other.

Further, from the viewpoint of the barrier effect of the discharged body fluid, the joint strength, the ease of suction of the body fluid, and the like, the length of the third free edge portion in the width direction W of the second overlap portion A ₂ is the second The ratio of the length of the joint portion in the width direction W is preferably 5/3 or more.

When the surface member is composed of a plurality of sheets, respectively In the case of each side sheet member, due to the surface of the skin surface side of the aforementioned surface member In this case, the free edge portion extending along the longitudinal direction L of the absorbent article is formed in the width direction W in a plurality of stages, so that the flow of the discharged body fluid in the width direction W can be more reliably stopped. The lateral leakage of the aforementioned body fluid can be prevented more effectively.

Further, as shown in FIG. 6, in the four sheets 221, 222, 231, and 232, the two sheets 221 and 231 located on the long axis C side are adjacent to the long axis C side. In the second overlapping portion A ₂ of the other two sheets 222 and 232 on the opposite side, the fourth free edge portions 221b and 231b are formed on the end edges of the side portions on the side opposite to the long axis C side. The portions separated from the end edges of the respective side portions are joined to each other.

In the second overlapping portion A ₂ , the length of the fourth free edge portion in the width direction W is the width of the second joining portion, from the viewpoint of the backflow suppressing effect of the body fluid absorbed by the absorber, the joint strength, and the like. The ratio of the length of the direction W is preferably 5/3 or more.

When two sheets of sheet material are located on the side of the long axis C described above When the free edge portion is formed on each of the end edges on the side opposite to the long axis C side, the free edge portion can more effectively suppress the backflow of the body fluid absorbed by the absorber, and the body fluid can be more reliably prevented. Attached to the wearer's skin.

Further, the absorbent article of the present invention is not limited to the aforementioned embodiment The state and the like can be appropriately combined, changed, and the like without departing from the scope of the invention and the technical idea.

The present invention is applicable, for example, to disposable diapers Various absorbent articles such as cloth, urine absorbent pad, and sanitary napkin are particularly preferably used for absorbent articles such as paper diapers and urine absorbent pads which are required to absorb a large amount of body fluid.

Hereinafter, embodiments of the present invention will be exemplified.

According to one embodiment of the present invention, an absorbent article comprising a liquid permeable surface member disposed on a skin surface side and an absorbent body disposed on a garment side of the surface member is provided in a longitudinal direction and a width direction, and is characterized in that: The surface member includes: a central sheet member disposed on a long axis of the absorbent article and extending in the longitudinal direction; and disposed on both sides of the longitudinal direction of the center sheet member, and facing the absorbent article One of the pair of side sheet members extending in the longitudinal direction, the surface member having a pair of first overlapping portions including the pair of side sheet members overlapping the center portion from the skin surface side a repeating portion formed by the sheet member and extending in the longitudinal direction, wherein each of the pair of first overlapping portions has a first joining portion that joins the center sheet member and the side sheet member and extends in the longitudinal direction; a first free edge portion of the side sheet member that protrudes in the longitudinal direction along the first joining portion.

Furthermore, in another embodiment of the present invention, each of the pair of first overlapping portions has a second free edge portion of the center sheet member that protrudes in a direction opposite to the long axis direction along the first joining portion.

In still another embodiment of the present invention, the first The free edge portion has a length in the width direction of 5/3 or more of the length of the first joining portion in the width direction.

Furthermore, in still another embodiment of the present invention, the aforementioned one Each of the first overlapping portions has a second free edge portion of the center sheet member that protrudes in a direction opposite to the long axis direction along the first joining portion, and the second free edge portion has the first joining portion The length in the width direction of 5/3 or more of the length in the width direction.

According to still another embodiment of the present invention, the side sheet member includes a plurality of sheets extending in the longitudinal direction and arranged in the width direction, and the side sheet member has a second repeating portion, the second sheet The repeating portion extends in the longitudinal direction and includes a repeating portion formed by laminating a sheet material located on the long axis side from the side of the absorbent body to another sheet adjacent to the side opposite to the long axis side, The second repeating portion includes: a second joining portion that joins the sheet material and the other sheet material and extends in the longitudinal direction; and the other sheet material that protrudes in the long axis direction along the second joining portion The third free edge.

In still another embodiment of the present invention, the first free edge portion has a constant length in the width direction over the entire length in the longitudinal direction.

Further, in still another embodiment of the present invention, in the absorbent body, the basis weight of the region corresponding to the center sheet member is larger than that of the other regions.

Furthermore, in still another embodiment of the present invention, in the foregoing The thickness of the region corresponding to the central sheet member of the absorbent body is larger than the thickness of the other regions.

According to still another embodiment of the present invention, the absorber includes a single layer or a plurality of layers of the absorbent core, and the thickness and/or the number of layers of the absorbent core in a region corresponding to the center sheet member is higher than the other The area is large.

In still another embodiment of the present invention, the first joining portion is formed by a hot melt adhesive applied in a straight line.

Furthermore, in still another embodiment of the present invention, the first joining portion is formed by a hot melt adhesive which is applied in a non-linear shape.

According to still another embodiment of the present invention, the first joining portion is formed by a hot melt adhesive which is applied in a non-linear shape, and the non-linear shape is a wave shape or a spiral is projected in a planar shape. .

Further, in still another embodiment of the present invention, the liquid permeability of the center sheet member is higher than the liquid permeability of the side sheet member.

In still another embodiment of the present invention, the center sheet member has a structure in which a plurality of convex portions are formed on at least a surface of the skin surface side.

1‧‧‧Absorbables

2‧‧‧Surface components

21‧‧‧Central sheet member

21a‧‧‧2nd Free Edge

21b‧‧‧2nd Free Edge

22‧‧‧one side sheet member

22a‧‧‧1st free edge

23‧‧‧The other side sheet member

23a‧‧‧1st free edge

3‧‧‧ absorber

31‧‧‧1st absorbent core

32‧‧‧2nd absorbent core

5‧‧‧ wrinkle forming members

5a‧‧‧ One side of the wrinkles forming a thin sheet

5b‧‧‧The other side of the wrinkle forming sheet

6‧‧‧Binder

A ₁ ‧‧‧1st repeat

C‧‧‧Long axis of absorbent articles

G‧‧‧Three-dimensional wrinkles

L‧‧‧ Length direction

W‧‧‧Width direction

11‧‧‧Abdominal side area

12‧‧‧ Under the region

13‧‧‧ Back side area

14‧‧‧Central zone

15, 16‧‧‧ side area

E ₁ ‧‧‧near the first repeat A ₁

Claims (14)

An absorbent article comprising a liquid-permeable surface member disposed on a skin surface side and an absorbent body disposed on a garment side of the surface member, wherein the absorbent article has a surface member: a central sheet member extending in a longitudinal direction of the absorbent article and extending in a longitudinal direction thereof; and a pair of both sides in the longitudinal direction of the center sheet member and extending in a longitudinal direction of the absorbent article In the side sheet member, the surface member has a pair of first overlapping portions including a repeating portion formed by superposing the pair of side sheet members from the skin surface side on the center sheet member And extending in the longitudinal direction, the pair of first overlapping portions each having a first joining portion that joins the center sheet member and the side sheet member and extends in the longitudinal direction; and along the first joining portion And a first free edge portion of the side sheet member that protrudes in the longitudinal direction. The absorbent article according to claim 1, wherein the pair of first overlapping portions respectively have a second freedom of the central sheet member that protrudes in a direction opposite to the long axis direction along the first joining portion Edge. The absorbent article according to claim 2, wherein the second free edge portion has a length in the width direction of 5/3 or more of the length of the first joining portion in the width direction. Absorbent material as claimed in any one of claims 1 to 3 In the product, the first free edge portion has a length in the width direction of 5/3 or more of the length of the first joining portion in the width direction. The absorbent article according to any one of claims 1 to 4, wherein the side sheet member includes a plurality of sheets extending in the longitudinal direction and arranged in the width direction, wherein the side sheet member has In the second repeating portion, the second repeating portion extends in the longitudinal direction and includes a sheet in which the sheet material located on the long axis side is superposed on the side opposite to the long axis side from the absorber side a second overlapping portion that joins the sheet material and the other sheet material and extends in the longitudinal direction; and the second joining portion and the long axis along the long axis The third free edge portion of the other sheet material that protrudes in the direction. The absorbent article according to any one of claims 1 to 5, wherein the first free edge portion has a length in a predetermined width direction over the entire length in the longitudinal direction. The absorbent article according to any one of claims 1 to 5, wherein in the absorbent body, a basis weight of a region corresponding to the central sheet member is larger than a base of the other regions. The absorbent article according to claim 7, wherein in the absorbent body, a region corresponding to the central sheet member is thicker than other regions. The absorbent article of claim 7 or 8, wherein the absorbent body comprises a single or multiple layers of absorbent core material, and the aforementioned central portion The thickness and/or the number of layers of the aforementioned absorbent core in the region corresponding to the sheet member is larger than the other regions described above. The absorbent article according to any one of claims 1 to 9, wherein the first joining portion is formed by a hot melt adhesive applied in a straight line. The absorbent article according to any one of claims 1 to 9, wherein the first joining portion is formed by a hot melt adhesive which is applied in a non-linear shape. The absorbent article according to claim 11, wherein the non-linear shape is a wave shape or a spiral is projected on a flat surface. The absorbent article according to any one of claims 1 to 12, wherein the liquid permeable property of the central sheet member is higher than that of the side sheet member. The absorbent article according to any one of claims 1 to 13, wherein the central sheet member has a structure in which a plurality of convex portions are formed on at least a surface of the skin surface side.