JP4020847B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article that has a gentle texture to the skin and that the design is clearly visible in appearance.

  Absorbent articles, especially disposable diapers, often use a film material for the outermost layer, which feels similar to the slimy feeling of plastics, but in recent years it has been improved by using a nonwoven fabric for the outermost layer. Many have been proposed. However, most of the outermost layer non-woven fabric is bonded to the inner absorbent body or back sheet so that the absorbent body does not move during or during the wearing of the absorbent article. Even if a non-woven fabric with a good texture was arranged on the outer layer, the texture could not be fully utilized.

  Regarding the adhesive pattern between the absorbent body and the sheet disposed on the outside thereof, Patent Document 1 describes a disposable diaper in which the absorbent body is attached to the outermost layer sheet only on both sides thereof. However, Patent Document 1 relates to a technique for removing the absorber from the outer layer sheet after use, and does not describe any device for preventing the absorber from moving during use.

  Patent Document 2 describes a disposable diaper in which an absorbent body is bonded to a back sheet with an adhesive provided along both right and left side edges. In general, diapers that are currently on the market are designed to give the user's motivation to use animals or other patterns on the waistline, etc., and such patterns can be clearly seen from the outside. preferable. However, Patent Document 2 does not describe anything about how the pattern looks when such a pattern is provided.

JP 2000-116703 A JP 2001-252302 A

  An object of the present invention is to provide an absorbent article that has a gentle texture to the skin and that the design is clearly visible in appearance.

  The present invention comprises a vertically long absorbent main body having a liquid-permeable surface sheet and a liquid-retaining absorbent, and an outer body having an outer layer sheet and an inner layer sheet. An absorbent article having a crotch portion positioned therebetween, wherein a sheet having a pattern is bonded and fixed between the outer layer sheet and the inner layer sheet, and the absorbent main body and the inner layer sheet are The absorptive main body is bonded to both sides in the longitudinal direction and front and rear ends, and the central part in the width direction of the absorptive main body at the crotch is not bonded to the exterior body or the absorptive main body This object is achieved by providing an absorbent article that is bonded to the exterior body with an adhesive having a lower basis weight than the adhesive used for bonding the both side portions and the front and rear end portions.

  The absorbent article of the present invention has a gentle texture to the skin, and the design is clearly visible in appearance.

The present invention will be described below based on preferred embodiments with reference to the drawings.
FIG. 1 shows a perspective view of a pants-type disposable diaper as an embodiment of the absorbent article of the present invention. FIG. 2 is a plan view showing a partially broken state in which the diaper shown in FIG. 1 is separated and developed by the side seal portion. FIG. 3 is an exploded perspective view showing an exterior body in the diaper shown in FIG. FIG. 4 shows an arrangement pattern of the adhesive arranged for bonding the absorbent main body and the exterior body in the diaper shown in FIG. FIG. 5 is a sectional view taken along line XX in FIG. FIG. 6 shows a cross-sectional view of the dorsal and ventral end flaps along the diaper longitudinal direction.

  As shown in FIG. 1, the diaper 1 is a pants type. As shown in FIGS. 2 and 5, the diaper 1 includes a vertically long absorbent main body 10 having a liquid-permeable surface sheet 2 and a liquid-retaining absorbent body 4, and an outer side (non-skin contact) of the absorbent main body 10. And the exterior body 5 which is bonded and fixed to the absorbent main body 10 and is disposed on both side edges and the back side of the abdominal side portion A disposed on the abdomen side of the wearer when worn. Both side edges of the back side portion B are joined to each other by known joining means such as heat sealing, high frequency sealing, and ultrasonic sealing to form a side sealing portion. Thereby, as shown in FIG. 1, the diaper 1 is formed with a waist opening 7 and a pair of leg openings 8,8. A crotch part C is formed between the ventral part A and the dorsal part B. The crotch part C is a part of the diaper corresponding to the crotch part of the wearer, and indicates a region that occupies 15% of the total length of the diaper from the longitudinal center part of the diaper toward the abdominal part A and the back part B. . The ventral part A and the dorsal part B are each region excluding the crotch part in the longitudinal direction.

  As shown in FIG. 2, the absorbent main body 10 has a vertically long rectangular shape, and the exterior body extends from the abdominal side A to the back side B of the diaper 1 with its longitudinal direction coinciding with the longitudinal direction of the diaper 1. 5 is joined to the central portion in the width direction by an adhesive. The absorbent body 4 in the absorbent main body 10 has an hourglass shape in which the central portion in the longitudinal direction is constricted, and one surface is covered with the topsheet 2.

  As shown in FIGS. 2 and 5, the absorbent main body 10 is formed with a pair of first three-dimensional guards 6 </ b> A and 6 </ b> A and second three-dimensional guards 6 </ b> B and 6 </ b> B extending in the longitudinal direction on both left and right side portions. As shown in FIG. 5, the first three-dimensional guard 6 </ b> A has a free end 61 </ b> A on the inner side in the width direction of the absorbent main body 10 and a fixed end (rising base end) 62 on the outer side. An elastic member 63A is disposed in the vicinity of the free end 61A so as to be extendable and retractable along the free end 61A. On the other hand, the second three-dimensional guard 6 </ b> B has a fixed end 64 with the exterior body 5, and has a free end 61 </ b> B on the outer side in the width direction than the fixed end 64. In the vicinity of the free end 61B, an elastic member 63B is disposed so as to be extendable and retractable along the free end 61B.

  The exterior body 5 is mainly composed of two sheet materials 51 and 52 and a sheet 3 having a design (hereinafter referred to as a back sheet). Specifically, as shown in FIGS. 3 and 5, the exterior body 5 has a structure in which an outer layer sheet 51 and an inner layer sheet 52 are laminated, and the back sheet 3 is bonded and fixed between these two sheets. ing. In the present embodiment, the back sheet 3 has substantially the same length and width as the absorbent body, and the exterior body 5 is formed from only the outer layer sheet and the inner layer sheet on both sides of the absorbent body of the abdominal part A and the back part B. Is structured. In FIG. 4, the outer layer sheet 51 is distinguished from the inner layer sheet 52 by adding a dot pattern to help understanding. The outer layer sheet 51 forms the outermost surface of the diaper 1. The inner layer sheet 52 is disposed on the inner surface side of the diaper 1 and is adjacent to the outer layer sheet 51 except for a portion where the back sheet 3 is interposed. Both the outer layer sheet 51 and the inner layer sheet 52 are made of nonwoven fabric.

  The outer layer sheet 51 and the inner layer sheet 52 have the same contour at the side edges, but the shapes in the longitudinal direction are different. Specifically, as shown in FIGS. 3 and 4, the outer layer sheet 51 includes extending portions 51 </ b> A and 51 </ b> B extending in the front-rear direction from the front and rear end edges of the inner layer sheet 52. The extending portions 51 </ b> A and 51 </ b> B are respectively folded back toward the absorbent main body 10 so as to cover the front and rear ends of the absorbent main body 10 after the absorbent main body 10 is disposed on the inner layer sheet of the exterior body 5. (See FIG. 6). The end edges of the extended portions 51 </ b> A and 51 </ b> B that are folded back extend beyond the front and rear end edges of the absorber 4 and reach the absorber. Accordingly, end flaps E1 and E2 extending in the front-rear direction from the front and rear end edges of the absorber 4 are formed in the diaper 1 (see FIGS. 1 and 6). The front and rear end portions 12a and 12b of the absorbent main body 10 are covered with the extension portions 51A and 51B in addition to the adhesion between the absorbent body 4 side surface of the absorbent main body 10 and the inner layer sheet 52 described later, It is firmly fixed to the exterior body 5.

The back sheet 3 has a pattern 30 and is arranged outside the absorber. The back sheet 3 in the present embodiment is a moisture permeable sheet, and is preferably liquid leakproof. In the present embodiment, a liquid-impermeable sheet made of a resin film is used as the back sheet 3.
As shown in FIGS. 1, 3, and 4, the back surface sheet 3 in the present embodiment has a rabbit face pattern 30 at a position located on the ventral side A and the back side B. The pattern 30 includes patterns such as circles, squares, triangles, lattices, and parallel lines as well as animals, vehicles, food, characters, notes, and character patterns. The symbol 30 of the present embodiment is a symbol for the purpose of inducing use motivation (for example, for the purpose of attracting children's interest). The pattern 30 may be present on any surface of the back sheet as long as it can be visually recognized through the exterior body 5, and various known printing methods, coating methods, and the like can be used as a method for providing the pattern on the back sheet. The pattern 30 in the present embodiment is provided on the surface of the back sheet 3 on the outer layer sheet 51 side by printing. The portion of the pattern 30 in the outer layer sheet 51 and the back sheet 3 is bonded through an adhesive or the like.

  Moreover, what has the role of the indicator which notifies that the absorber got wet can also be provided as a pattern for other purposes. The design having the role of an indicator is usually provided on the surface of the back sheet on the absorber side, and the shape and / or color of the design is changed by contact with the liquid (urine) absorbed by the absorber 4, so that the diaper is Make it possible to visually identify that it is wet.

  As described above, the back sheet 3 is bonded and fixed between the outer layer sheet 51 and the inner layer sheet 52. Specifically, the outer layer sheet 51 and the inner layer sheet 52 are joined to each other via an adhesive applied to the outer layer sheet 51 side in a portion extending outward from the peripheral edge portion of the back sheet 3. The outer layer sheet 51 and the back sheet 3 are also bonded together by the adhesive applied in the same manner as the adhesive. In the present invention, it is not necessary to join the inner layer sheet 52 and the back sheet 3 with an adhesive. There is no adhesive between the inner layer sheet 52 and the back sheet 3 in the present embodiment, and the two sheets are not joined. For this reason, the texture of the product is excellent and the moisture permeability of the diaper is high.

  When the film material (back sheet 3) having the pattern 30 is sandwiched between the two non-woven fabrics (sheets) 51 and 52 constituting the outer package 5 as in the present embodiment, the outer sheet 51 is viewed only. As a result, the design can be clearly seen. In particular, it is effective when a material having a high basis weight is used in consideration of the texture of the outer sheet 51 and leakage prevention. Moreover, since the non-woven fabric and the film having better adhesiveness are bonded to each other by bonding the outer sheet 51 and the film having the design (back sheet), the non-woven fabric and the non-woven fabric are bonded. Reduction is possible, the texture is not impaired, and the pattern is clearly visible from the outside.

  Moreover, in this embodiment, as shown in FIG.2 and FIG.4, the surface by the side of the absorber 4 (non-skin contact surface side) in the absorptive main body 10 and the inner layer sheet | seat 52 in the exterior body 5 are absorptive. The side portions 11, 11 in the longitudinal direction of the main body 10 and the front and rear end portions 12 a, 12 b are bonded to each other by an adhesive, and the central portion 18 in the width direction of the absorbent main body 10 in the crotch C is bonded to the exterior body 5. Not. More specifically, the absorbent body 10 and the exterior body 5 are bonded to each other in areas other than the portions fixed to the exterior body 5 (both side portions 11 and 11 and front and rear end portions 12a and 12b of the absorbent body 10). It has not been.

  In FIG. 4, reference numeral 10 ′ is an arrangement part of the absorbent main body 10, 11 ′ is an adhesive for bonding the side portions 11, 11 of the absorbent main body 10, and 12 a ′ and 12 b ′ are the absorbent body 10, respectively. An adhesive for bonding the front and rear end portions 12a and 12b is shown. Each adhesive used in the present embodiment is a hot-melt adhesive, and is applied using a coater. In addition, as an adhesive agent, the various well-known adhesive agents conventionally used for a disposable diaper etc. can be used.

  According to the diaper 1 of the present embodiment, the pattern 30 is in close contact with the exterior body 5 and clearly visible from the outside through the exterior body 5, and the texture of the nonwoven fabric (sheet) used for the outer layer sheet 51 is impaired. There is no. In addition, the texture (feel) of the crotch part C, particularly the touch when touching the outer surface side of the diaper crotch part, is very soft, and the moisture permeability is high, so that the occurrence of fog and the like hardly occurs.

From the viewpoint of improving the texture of the crotch C, it is preferable that the central portion 18 in the width direction of the absorbent main body 10 in the crotch C is not bonded to the exterior body 5, but to the extent that the effect of improving the texture is not impaired. It may be adhered. However, when the basis weight of the adhesive is higher than the adhesive used for bonding at the both side portions 11 and 11 or the front and rear end portions 12a and 12b of the absorbent main body 10, a good texture (feel) of the crotch C is obtained. It becomes difficult to maintain. Therefore, adhesives 11 ′, 12a ′, 12b ′ used for bonding the both side portions 11, 11 and the front and rear end portions 12a, 12b of the absorbent main body 10 and an adhesive used for fixing the vicinity of the central portion of the absorbent main body at the crotch preferably the basis weight difference of at least 0.5 g / m ^2, in particular 0.5 to 10 g / m ² of material, from the same viewpoint, in the vicinity of the widthwise central portion of the absorbent body 10 in the crotch portion C The basis weight of the adhesive used for fixing is preferably 0 to 10 g / m ² , particularly preferably 0 to 5 g / m ² .

The coating amount of the adhesive 11 ′ that bonds the both side portions 11, 11 of the absorbent main body 10 and the exterior body 5 is a texture while ensuring sufficient adhesive strength that the absorbent main body 10 and the exterior body 5 do not peel off. From the viewpoint of improving (soft feel), 1 to 20 g / m ² , particularly ² to 10 g / m ² is preferable.

The application amount of the adhesives 12a ′ and 12b ′ for bonding the front and rear end portions 12a and 12b of the absorbent main body 10 to the exterior body 5 is in the manufacturing process when the outer sheet 51 is folded on the absorber. 0.5 to 20 g / m ² from the viewpoint of ensuring the bonding strength so as not peel off, in particular 1 to 10 g / m ² is preferred.

  In the diaper 1 of the present embodiment, the adhesive 11 ′ for bonding the side portions 11, 11 of the absorbent main body 10 and the exterior body 5 is enlarged as shown in FIG. 4. 10 is intermittently applied in the longitudinal direction, and more specifically, the adhesive placement portions 14 and the adhesive non-placement portions 15 are alternately arranged along the longitudinal direction of the absorbent main body 10, It is coated so as to form a band-like adhesion region. The width W (see FIG. 4) of the adhesion region is preferably about 1 to 50 mm, particularly about 3 to 30 mm. The pitch P (see FIG. 4) of the adhesive placement portion 14 in the longitudinal direction of the absorbent main body 10 in the present embodiment is about 0.3 to 5 mm, and the length L1 in the same direction of each adhesive placement portion 14 ( 4) is about 0.15 to 3 mm. Here, the pitch P in the longitudinal direction indicates the total length of the lengths of the adjacent adhesive placement portions 34 and the adhesive non-placement portions 15 in the longitudinal direction. The length of the adhesive non-arrangement portion 15 in the longitudinal direction of the diaper is preferably 5 mm or less. By doing in this way, it is possible to prevent “floating (a part of the exterior body floats from the absorbent main body)” on the appearance. Moreover, it is preferable that the length L1 of the longitudinal direction of the adhesive arrangement | positioning part 14 is 0.15 mm or more. By doing in this way, it becomes difficult to receive the influence of the foreign material etc. which mix in an adhesive agent, and possibility that the part which is not smeared or apply | coated will generate | occur | produce becomes low.

Thus, it is preferable to use the adhesive applied intermittently for bonding the absorbent main body 10 and the exterior body 5 from the viewpoint of improving the texture (soft feel).
When the adhesive is applied intermittently, the amount of the adhesive applied is obtained by calculating the area of the entire adhesive region including the adhesive non-arrangement portion 15 located between the adhesive arrangement portions 14. The total weight of the adhesive in the adhesion area is determined.
The adhesives 12a 'and 12b' at the front and rear ends of the absorbent main body 10 may also be applied intermittently, but in the present embodiment, they are applied to the entire surface (so-called solid coating). .

Further, non-woven fabric used as an outer layer sheet 51, it focuses on the texture, and the balance with the strength, a basis weight of 10 to 30 g / m ^2, it is preferable that especially 15-25 g / m ^2. Moreover, when it is this range, when a water-repellent nonwoven fabric is used, since it is excellent in leak-proof property, it is preferable. On the other hand, the nonwoven fabric used as the inner layer sheet 52, emphasis on strength, in consideration of the texture, it is preferred that the basis weight of 10 to 25 g / m ^2, in particular 12~20g / m ^2.

Moreover, the basic weight of the adhesive agent used for adhesion | attachment between the outer layer sheet | seat 51 and the inner layer sheet | seat 52 which comprises the exterior body 5 is 1-20 g / m < ² > from a viewpoint of the adhesiveness of sheets and the texture of an exterior body. It is preferable. Here, the adhesive is the total of the adhesives existing between the exterior sheets.

As the outer layer sheet 51, a sheet having translucency is used. The light transmittance measured by the following measuring method is 50% or more, preferably 60% or more.
<Measurement method>
Using a reflection / transmittance meter (in this specification, Murakami Color Research Laboratory, trade name “HR-100” is used), the value of total light transmittance T was measured using an A light source. Ten arbitrary points on the sample were measured, and the average value was used as the light transmittance value.

The exterior body 5 preferably has a leak-proof property, and it is preferable to use a water-repellent nonwoven fabric in consideration of the texture and the moisture performance. When the outer layer sheet 51 and the inner layer sheet 52 in the outer package 5 have a water pressure resistance measured by the following method of 2 g / cm ² or more, particularly 3 g / cm ² or more, sufficient liquid impermeability is obtained. It is preferable because it exhibits. Moreover, as the exterior body 5, it is preferable to have a leak-proof property of 5 g / cm ² or more, particularly 8 g / cm ² or more. In particular, when an absorber is present, the outer package 5 preferably has a leak-proof property of 10 g / cm ² or more. For this purpose, it is preferable to dispose a liquid-impermeable resin film as a back sheet between the outer layer sheet and the inner layer sheet at the position where the absorber exists. The outer layer sheet 51 is preferably an air-through nonwoven fabric and the inner layer sheet 52 is preferably a spunbond nonwoven fabric.
<Measurement method of water pressure resistance>
A sample sheet is sandwiched between two cylindrical tubes having an inner diameter of 35 mm that are vertically connected, and physiological saline is poured into the upper cylindrical tube at a rate of 8 g / min. The time is measured when the saline begins to break through the sample sheet and flow into the lower cylindrical tube. The amount of liquid is calculated from the flow rate of physiological saline and the time required to break through the sample sheet. A value obtained by dividing the calculated liquid amount by the cross-sectional area of the cylindrical rod (area of the region surrounded by the inner wall surface) is defined as a water pressure resistance.

Moreover, it is preferable that the bending rigidity of the absorber 4 is 1-60 cN / 50 mm, especially 1-40 cN / 50 mm from a viewpoint of raising the softness of the whole product.
The bending rigidity includes a bending rigidity in the longitudinal direction and a bending rigidity in the width direction of the absorbent main body 10, and the bending rigidity in the width direction is preferably within the above range.

The bending rigidity of the absorber 4 can be measured as follows.
[Measurement method of bending stiffness]
The measurement is performed using a Tensilon tester [RTC-1150A manufactured by Orientec Co., Ltd.] in accordance with JIS standard K7171 method (plastic-bending property test method) (R1 = 5.0 ± 0). 0.1 mm, R2 = 5.0 ± 0.2 mm).
The test piece is placed so as to pass between both edges of the support base where the edge span L is 50 mm, and the tip of the indenter is arranged so as to slightly touch the test piece. A load-deflection curve is obtained by lowering the indenter under conditions of a load cell of 5 kg (range: 200 cN) and a speed of 30 mm / min. Let the maximum value of the obtained bending stress be a bending rigidity value (cN / 50 mm).

[Method for preparing test piece]
The test piece is taken out of the absorbent article from the absorbent article (including those if wrapped in tissue paper or non-woven fabric), and the longitudinal direction of the absorbent main body 10 from the center in the longitudinal direction and the width direction. Into a rectangular shape of 50 mm and 80 mm in the width direction. 50 mm in the unit of the flexural rigidity value is the length of the short side of the test piece, and is the width of the test piece bent with the indenter at the time of the test. The test piece is bridged between both edges, with the long sides thereof aligned in the direction from one edge to the other. If the absorber cannot be taken out from the absorbent article, measure the stiffness value including materials such as exterior materials and back sheets and the stiffness value of each material, and calculate the stiffness value of the absorber from that value. Find the body stiffness value.

  In the diaper 1 of the present embodiment, as shown in FIGS. 1, 3 and 6, a plurality of elastic members 71 extending in the width direction of the diaper 1 are extended at predetermined intervals on the end flaps E1 and E2. It is arranged. As a result, an annular waist gather that is substantially continuous over the entire circumference of the waist opening 7 is formed. Each leg opening 8, 8 is provided with a plurality of elastic members 81 for forming leg gathers along the edge of the opening. The elastic member 81 for forming leg gathers is disposed and fixed in an expanded state so that elastic stretchability is expressed at least at a portion outward in the width direction from both side edges of the absorber 4. At least the central part in the width direction of the overlapping portion is not disposed in a state where the elastic stretchability is expressed. For this reason, a pocket structure is formed in the product crotch part, and the absorption performance can be sufficiently exhibited.

  Moreover, as shown in FIG. 2, the outer layer sheet 51 and the inner layer sheet 52 extend from the both side edges in the longitudinal direction of the absorbent body 4 to the left and right sides to form side flap portions, and the ventral side portion A and the back side As shown in FIG. 3, a plurality of elastic members 91 are sandwiched and fixed between the outer layer sheet 51 and the inner layer sheet 52 in the side flap portions Sa and Sb of the portion B so as to expand and contract in the width direction of the diaper 1. . In the natural state, these elastic members 91 form gathers (hereinafter also referred to as side gathers) in the side flap portions Sa and Sb of the ventral portion A and the back portion B. These elastic members 91 are disposed and fixed in a stretched state so that elastic stretchability is expressed at least in the width direction outer side than both side edges of the absorber 4, and in a portion overlapping the absorber 4. At least the central portion in the width direction is not disposed in a state where the elastic stretchability is exhibited. The elastic member 91 extends in the width direction of the diaper 1 to the waist circumference D, which is a region from the position of 20 mm downward from the opening peripheral edge of the waist opening 5 to the position of the upper end of the leg openings 8 and 8. And arranged parallel to each other.

  In the present embodiment, the elastic member 91 is elastic only in the side flap portions Sa and Sb so that the elastic member 91 substantially exhibits elasticity only in the side flap portions Sa and Sb of the ventral portion A and the back portion B. The adhesive for fixing 91 is used, and it can prevent that the exterior body 5 of the site | part which overlaps with the absorber in the ventral part A and the back part B becomes hard. Moreover, since shrinkage | contraction of the back surface sheet 3 is suppressed, the pattern 30 can be seen very clearly from the outside of a diaper. Furthermore, since it expands and contracts only in the side flap portions Sa and Sb of the ventral portion A and the dorsal portion B and the portion overlapping the absorbent body 4 does not contract, it prevents the material from being felt due to gathering of the material due to the contraction. be able to. Therefore, it is possible to obtain a very soft feel at the portions of the ventral portion A and the back portion B that overlap with the absorber 4. Therefore, the diaper of this embodiment is accepted as a diaper having a touch like underwear by a caregiver such as a mother.

  As the elastic member 91 for forming the side gather, a thread-like elastic member of 450 dtex or less, preferably 200 to 400 dtex is used. The gather of the side gather becomes fine, a good texture is obtained, and the touch is closer to underwear. Is preferable. In addition, when the gathers are gathered densely, when a hydrophobic adhesive is used, the hydrophobicity of the part increases, so that the liquid leaking from the absorbent oozes out to the outside of the diaper. The effect to prevent increases.

  As a material constituting each part of the diaper of the present embodiment, those usually used in the technical field can be used without particular limitation. For example, as the surface sheet 2, a hydrophilic and liquid-permeable nonwoven fabric or an apertured film can be used. As the absorbent body 4, a mixed fiber of fluff pulp and superabsorbent polymer particles wrapped with tissue paper or nonwoven fabric can be used. As each elastic member, a natural or synthetic elastomer material can be used. As a sheet constituting the three-dimensional guard, a film (mainly having moisture permeability) or the like is used in addition to a water-repellent nonwoven fabric.

As the back sheet 3, a liquid-impermeable film, particularly a moisture-permeable film is preferably used. As the moisture-permeable film, for example, a microporous film can be used. The microporous film is formed by, for example, melt-kneading a hydrophobic thermoplastic resin and a fine inorganic filler made of calcium carbonate or the like, or an organic polymer incompatible with the thermoplastic resin, It is obtained by uniaxially or biaxially stretching the film. Incidentally, the moisture permeability of the back sheet 3 measured in a single state where no adhesive is applied is 2000 to 8000 g / (m ² · 24 hr) when the moisture permeability value measured according to JIS Z 0208 is 25 ° C. It is preferable.

As mentioned above, although preferable embodiment of this invention was described, this invention can be changed suitably in the range which does not deviate from the meaning.
For example, the pattern 30 of the back sheet 3 may be provided only on either the abdominal side A or the back side B, or may be provided on the crotch C. Furthermore, the abdominal side A and the crotch C It may be provided at the boundary between the back side B and the crotch part C. Moreover, the shape of each part, a forming material, etc. can be changed suitably.

  Moreover, the back sheet 3 in the diaper 1 of the above embodiment is basically bonded and fixed between the outer layer sheet 51 and the inner layer sheet 52 having a length and width equal to or greater than those of the absorber 14. However, for example, in the case where a sheet capable of expressing leakage is arranged on the absorbent main body side, the size of the back sheet 3 may be smaller than that of the absorber 4, and the back sheet 3 may be partially or A liquid-permeable sheet as a whole can also be used. For example, in the crotch part C, a liquid-impermeable sheet having the same width as the absorber is disposed between the inner layer sheet and the absorber, and the back sheet 3 is provided on at least one of the ventral side A and the back side B. A configuration in which the crotch part C is not provided is also possible. In addition, when the back side of both side edges of the absorbent main body is covered with a water-repellent nonwoven fabric, etc., it is considered that a sheet that exhibits leakproofness is disposed on both side edges of the absorbent main body. Can do.

  As another example, instead of the above-described embodiment, the back sheet 3 wider than the absorbent body 14 is arranged only between the outer layer sheet 51 and the inner layer sheet 52 in the abdominal part A and the back part B, and In the section, a second back sheet (liquid-impermeable sheet material) is disposed between the absorber 14 and the inner layer sheet 52 so that the back sheet is always disposed below the absorber 4. The absorptive main body 10 and the exterior body 5 may be bonded and fixed (so that the liquid is not exposed to the outside).

  The absorbent article of the present invention may be a pants-type absorbent article other than a pants-type disposable diaper, for example, a shorts-type sanitary napkin, a pants-type incontinence pad, or a so-called unfolded disposable diaper. An incontinence pad may be used.

  It should be noted that the description omitted in one embodiment and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately applied between the embodiments. Can be substituted.

FIG. 1 is a perspective view showing a pants-type disposable diaper as an embodiment of the absorbent article of the present invention. FIG. 2 is a plan view partially broken away showing a state where the diaper shown in FIG. FIG. 3 is an exploded perspective view showing an exterior body in the diaper shown in FIG. 1. FIG. 4 is a diagram illustrating an arrangement of an adhesive disposed for bonding the absorbent main body and the exterior body in the diaper illustrated in FIG. 1. 5 is a schematic cross-sectional view showing a cross section taken along line XX in FIG. 2 of the diaper shown in FIG. FIG. 6 shows a cross-sectional view of the diaper shown in FIG. 1 along the longitudinal direction of the back flap and the ventral end flap.

Explanation of symbols

1 Pants-type disposable diaper (absorbent article)
2 Top sheet 3 Back sheet (Sheet with pattern)
DESCRIPTION OF SYMBOLS 4 Absorber 5 Exterior body 51 Outer layer sheet 52 Inner layer sheet 10 Absorbent main body 11 Both sides 11 'of the absorbent main body Adhesives 12a and 12b adhering the both sides of the absorbent main body The front and rear ends 12a of the absorbent main body ', 12b' Adhesive bonding the front and rear ends of the absorbent body

Claims (5)

It consists of a vertically long absorbent main body having a liquid-permeable surface sheet and a liquid-retaining absorbent, and an exterior body having an outer layer sheet and an inner layer sheet, and is located between the abdominal side, the back side, and both An absorbent article having a crotch part,
A sheet having a pattern is bonded and fixed between the outer layer sheet and the inner layer sheet,
The absorbent main body and the inner layer sheet are bonded to each other at both side portions and front and rear end portions in the longitudinal direction of the absorbent main body, and the widthwise central portion of the absorbent main body at the crotch portion is the absorption center. It is adhered to the exterior body with an adhesive having a lower basis weight than the adhesive used for bonding the both sides and the front and rear ends of the adhesive main body,
The adhesive bonding the both side portions of the absorbent main body and the inner layer sheet is intermittently applied in the longitudinal direction of the absorbent main body, and the adhesive placement portion and the adhesive non-placement portion absorb the absorption. Band-shaped adhesive regions arranged alternately along the longitudinal direction of the adhesive main body are formed, the width W of the adhesive region is 1 to 50 mm, and the adhesive placement portion is the longitudinal direction of the absorbent main body An absorbent article having a pitch P of 0.3 to 5 mm and a length L1 in the same direction of 0.15 to 3 mm .   The exterior body extends from the both side edges of the absorber to the left and right outwards to form side flap portions, and between the outer layer sheet and the inner layer sheet in the ventral side portion and the back side portion, An elastic member is sandwiched and fixed so as to expand and contract in the width direction of the absorbent article, and the elastic member is disposed at least in the center in the width direction of the portion overlapping with the absorbent body in a state of exhibiting elastic stretchability. The absorbent article of Claim 1 which is not.   The absorbent article according to claim 1 or 2, wherein the absorber has a bending rigidity of 1 to 60 cN / 50 mm.   The absorbent article according to any one of claims 1 to 3, wherein the sheet having the design and the outer layer sheet are moisture-permeable.   The absorbent article according to any one of claims 1 to 4, wherein the sheet having the design is disposed on the abdomen or the back side and is not disposed on the crotch part.

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