WO2018100650A1 - Article absorbant - Google Patents

Article absorbant Download PDF

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Publication number
WO2018100650A1
WO2018100650A1 PCT/JP2016/085441 JP2016085441W WO2018100650A1 WO 2018100650 A1 WO2018100650 A1 WO 2018100650A1 JP 2016085441 W JP2016085441 W JP 2016085441W WO 2018100650 A1 WO2018100650 A1 WO 2018100650A1
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WO
WIPO (PCT)
Prior art keywords
region
width direction
absorber
top sheet
absorbent
Prior art date
Application number
PCT/JP2016/085441
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English (en)
Japanese (ja)
Inventor
麗子 ▲高▼島
Original Assignee
ユニ・チャーム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ユニ・チャーム株式会社 filed Critical ユニ・チャーム株式会社
Priority to PCT/JP2016/085441 priority Critical patent/WO2018100650A1/fr
Priority to JP2017566059A priority patent/JP6711850B2/ja
Publication of WO2018100650A1 publication Critical patent/WO2018100650A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin

Definitions

  • the present invention relates to an absorbent article having a lotion on a top sheet.
  • Patent Document 1 discloses an absorbent article having a top sheet with lotion.
  • the lotion of Patent Document 1 is discontinuously arranged at intervals in the central region in the width direction of the absorbent article.
  • the lotion of Patent Document 1 exhibits an effect by touching the wearer's skin during use, and a lotion having a high viscosity is selected so as not to flow into the article (paragraph 0059 of Patent Document 1).
  • absorbent articles are laminated in the thickness direction during distribution and are pressed in the thickness direction.
  • an absorptive article receives a body pressure in the state worn, and is pressed in the thickness direction.
  • the lotion in the top sheet may move to the absorber side.
  • the lotion attached to the top sheet moves, it becomes difficult for the lotion to touch the skin, and the effect of the lotion may not be continued.
  • This invention is made
  • the absorbent article which concerns on this indication is the front-back direction (front-back direction L), the width direction (width direction W) orthogonal to the said front-back direction, an absorber (absorber 40), and the said absorber.
  • top sheet disposed on the skin-facing surface side, and the absorbent body has a central region (central region 44) disposed in the center in the width direction of the absorbent body, and the central region Side areas (side areas 45) arranged on both sides in the width direction of the top area, the basis weight of the side areas is higher than the basis weight of the center area, the center of the top sheet
  • the gist is that an application area (application area 53) to which a lotion is applied is provided in an area overlapping the area.
  • FIG. 2 is a cross-sectional view of the disposable diaper along the line AA shown in FIG. 1. It is a top view of the absorber of a deployment state.
  • FIG. 4 is a cross-sectional view of the absorber along the line BB in FIG. 3. It is sectional drawing which showed typically the cross section along the width direction of a top sheet and an absorber. It is sectional drawing which showed typically the wearing condition of a disposable diaper. It is the figure which showed the result of the printing speed of the absorbent article which concerns on Example 1 and 2, and the printing speed of the absorbent article which concerns on Comparative Examples 1-3. It is the figure which showed the photograph of the top sheet of 30 second progress, 1 minute progress, 2 minutes progress, 3 minutes progress, and 5 minutes progress from the dripping start at the time of dripping 3 times simulated urine.
  • the central area has a lower basis weight than the side area, and is less susceptible to pressure than the side area when the absorbent article is pressed in the thickness direction. Since the lotion is attached to the area overlapping with the central area, the lotion of the top sheet is difficult to move to the absorber side, and the lotion remains on the top sheet, so that the effect of the lotion is easily continued.
  • the application area is also arranged in an area overlapping the side area of the top sheet, It is desirable that the basis weight of the lotion of the application region overlapping the central region is higher than the basis weight of the lotion of the application region overlapping the side region in a state where the absorbent article is opened from the package body. .
  • the area that overlaps the central area is located in the center of the absorbent body in the width direction, and a lot of body fluid is discharged from the excretion opening. Since the basis weight of the lotion in the area overlapping with the central area is large, the effect of the lotion is easily continued in the area where a lot of body fluid is discharged.
  • Such an absorbent article The application area and the non-application area where the lotion is not applied extend in the front-rear direction and are alternately arranged in the width direction,
  • the hydrophilicity of the application area is lower than the hydrophilicity of the non-application area,
  • the application area is provided on the skin facing surface side of the top sheet, It is desirable that the application region and the non-application region are arranged in a region overlapping the central region in the top sheet.
  • the application area and the non-application area are alternately arranged, and the lotion applied to the application area penetrates into the non-application area. Since the application region is provided on the skin-facing surface side of the top sheet, lotion that has penetrated into the non-application region also permeates the skin-facing surface side of the top sheet. On the skin facing surface side of the non-application area, a part of the lotion penetrates and the hydrophilicity is lowered. Therefore, in the non-application area, the hydrophilicity of the top sheet changes in the thickness direction, and the hydrophilicity increases from the skin facing surface side toward the non-skin facing surface side.
  • the body fluid discharged onto the top sheet is guided from the low hydrophilicity side to the high hydrophilicity side, it is guided from the application area to the non-application area.
  • the body fluid guided to the non-application area easily moves to the non-skin facing surface side having higher hydrophilicity, and is drawn to the absorber side. Therefore, body fluid can be drawn quickly. Since the application region and the non-application region are arranged in the region overlapping with the central region and the lotion tends to remain on the top sheet, the function of drawing body fluid is easily continued.
  • region are provided along the front-back direction, a bodily fluid can be spread
  • the density of the side region is preferably higher than the density of the central region.
  • the body fluid drawn into the central region is guided to the side region.
  • the body fluid can be diffused in the width direction, and the body fluid can be drawn more easily. Further, the absorption performance can be effectively utilized over the entire region in the width direction of the absorber.
  • the thickness of the central region is preferably thinner than the thickness of the side region.
  • the thickness of the absorber is relatively thin and is recessed on the non-skin facing surface side as compared with the side region. Therefore, the region overlapping with the central region is not easily pressed in the thickness direction, keeps the lotion, and easily maintains the effect of the lotion. Moreover, since the center area
  • the absorber has a wall portion extending from the side region toward the non-skin facing surface side toward the central region, In the top sheet, it is preferable that at least the non-application region is disposed in a region overlapping the wall portion.
  • the body fluid drawn into the central area can be drawn into the side area by the non-application area of the wall.
  • the body fluid can be diffused in the width direction, and the body fluid can be drawn more easily.
  • the length in the width direction of the non-application area is preferably 1 mm or more and 10 mm or less.
  • the top sheet can have both liquid repellency and liquid permeability.
  • the top sheet has a convex part and a concave part recessed on the non-skin facing surface side than the convex part,
  • the convex portions and the concave portions extend in the front-rear direction and are alternately arranged in the width direction,
  • the application area is provided at least on the convex part,
  • the non-application area is preferably provided at least in the recess.
  • the hydrophilicity of the top sheet facing the skin side is low, and when the lotion is not applied to the concave part, the hydrophilicity of the top sheet facing the skin side is maintained high. Is done. Therefore, the hydrophilicity increases from the convex part toward the concave part.
  • the body fluid easily shifts to the non-skin facing surface side with higher hydrophilicity, is drawn into the absorber side, and is quickly drawn into the absorber side. Further, the body fluid can be diffused in the front-rear direction by the convex portions and the concave portions of the top sheet, and it becomes easy to effectively utilize the absorption performance over the entire region in the front-rear direction of the absorbent body.
  • the absorber has pulp and a superabsorbent polymer,
  • the basis weight of the superabsorbent polymer in the side region is preferably higher than the basis weight of the superabsorbent polymer in the central region.
  • the side region tends to swell when absorbing body fluids.
  • the central region is more difficult to receive body pressure when worn, and the lotion can be prevented from shifting to the absorber side.
  • the swelling of the side region increases the volume of the space between the wearer and the absorbent body, continues to diffuse body fluid in the front-rear direction, and effectively utilizes the absorption performance throughout the front-rear direction of the absorbent body. It becomes easy.
  • the absorber has a pair of first folds and a pair of second folds extending in the front-rear direction,
  • the absorber is A central absorbent layer located between the pair of first folds and including the center in the width direction of the absorber;
  • a pair of first side absorbent layers positioned between the second fold line and the first fold line located on the inner side in the width direction from the first fold line and disposed on the skin facing surface side of the central absorbent layer;
  • a pair of second side absorbent layers that are located on the outer side in the width direction than the second fold and are respectively disposed on the skin facing surface side of the first side absorbent layer, In the central region, only the central absorbent layer is disposed, In the side region, the central absorption layer, the first side absorption layer, and the second side absorption layer are laminated, It is desirable that the skin facing surface of the first side absorbent layer and the non-skin facing surface of the second side absorbent layer are not joined.
  • the thickness of the side region is likely to be thicker than the configuration in which the first side absorption layer and the second side absorption layer are joined. Therefore, the dent by the center region can be formed deeply. The area overlapping with the central area is less likely to be pressed, keeps the lotion, and easily maintains the effect of the lotion.
  • Such an absorbent article has a non-skin surface sheet disposed on the non-skin facing surface side of the absorber,
  • the second side absorption layer extends outward in the width direction from the first fold, A non-skin facing of the second side absorbent layer, and a non-skin facing of the second side absorbent layer on the inner side in the width direction with respect to the non-skin facing sheet and the non-skin facing sheet of the second side absorbent layer. It is desirable that a non-joining region in which the surface and the non-skin surface sheet are not joined is provided.
  • the second side absorption layer and the non-skin sheet are joined by the joining region and are not joined by the non-joining region. Therefore, when a force directed from the outside in the width direction to the inside in the width direction is applied, the absorbent body in contact with the non-joining area is deformed so as to rise to the wearer side with the joining area as a base point, and the second side part is absorbed.
  • a space surrounded by the layer, the non-skin surface sheet, and the central absorbent layer can be provided. Urine can be accommodated by the space. Moreover, urine can be spread
  • FIG. 1 is a top view of the unfolded state of the disposable diaper 10 as an absorbent article which concerns on this embodiment.
  • FIG. 2 is a cross-sectional view of the disposable diaper 10 taken along the line AA shown in FIG.
  • FIG. 3 is a plan view of the absorbent body in a developed state.
  • FIG. 4 is a cross-sectional view of the absorber taken along line BB shown in FIG.
  • the plan view shown in FIG. 1 is a diagram in a state where the leg stretchable portion 75 and the elastic member 77 of the three-dimensional gather are extended until the top sheet 50 and the side sheets 70 constituting the disposable diaper are not formed with a heel.
  • the absorbent article of this Embodiment is not restricted to a disposable diaper, An absorption pad may be sufficient.
  • the disposable diaper 10 has a front waistline region 20, a crotch region 25, and a back waistline region 30.
  • the front waistline region 20 is a portion in contact with the wearer's front waistline portion (abdomen portion).
  • the back waistline area 30 is a part which contacts a wearer's back waistline part (back part).
  • the crotch region 25 is a region that is located between the front waistline region 20 and the rear waistline region 30 and is provided with a leg opening 35.
  • the leg opening 35 is provided at the outer edge of the disposable diaper, and is a portion that is disposed around the leg of the wearer while the disposable diaper is worn by the wearer.
  • the outer edge is an outer end in the width direction
  • the inner edge is an inner end in the width direction.
  • the direction from the front waistline region 20 to the rear waistline region 30 is referred to as the front-rear direction L
  • the direction orthogonal to the front-rear direction L is referred to as the width direction W
  • the skin facing surface side T1 of the wearer The direction opposite to the skin facing surface side T1 and including the non-skin facing surface side T2 of the wearer is referred to as a thickness direction T.
  • the disposable diaper 10 has at least the absorber 40, the top sheet 50 arrange
  • the absorber 40 is disposed at least in the crotch region 25.
  • the absorber 40 has the absorption core 40a and the core wrap 40b.
  • the absorbent core 40a can be made of a material similar to that of a conventional disposable diaper, includes an absorbent material such as pulverized pulp or a superabsorbent polymer (SAP), and can be appropriately formed using a known member or material.
  • the core wrap 40b is a sheet that covers the absorbent core 40a that is an absorbent material.
  • the core wrap 40b is composed of various fiber nonwoven fabrics or tissues having liquid permeability.
  • the absorber 40 will be described in detail later.
  • the top sheet 50 is formed of a liquid permeable sheet such as a nonwoven fabric or a woven fabric.
  • the top sheet 50 is a sheet that comes into contact with the skin of the wearer.
  • the back sheet 60a has liquid impermeability and is disposed on the non-skin facing surface side T2 of the absorbent core 40a and the core wrap 40b.
  • an exterior sheet 60 made of a nonwoven fabric is disposed on the non-skin facing surface side T2 of the back sheet 60a.
  • the side sheet 70 covers the outer edge of the top sheet 50 and extends outside the top sheet 50 in the width direction W.
  • the inner edge of the side sheet 70 is folded outward in the width direction W, and an elastic member 77 that expands and contracts in the front-rear direction is disposed between the two side sheets 70.
  • the side sheet 70 and the elastic member 77 constitute a three-dimensional gather.
  • a three-dimensional gather has the elastic member 77 which expands-contracts in the front-back direction, and is arrange
  • the side sheet 70 is provided with a fastening tape 90.
  • the fastening tape 90 extends along the width direction W in the rear waistline region 30 and is fastened to the target portion 95 of the front waistline region 20 to hold the disposable diaper 10 on the wearer's body.
  • the target portion 95 is configured such that the pair of fastening tapes 90 are fixed to each other.
  • On the outer side in the width direction of the absorber 40 there is provided a leg expansion / contraction portion 75 that is formed around the leg opening 35 and that can expand and contract in the front-rear direction L.
  • the absorber 40 is in the form of a single sheet in the unfolded state.
  • the absorber 40 has a pair of first fold lines FL1 extending in the front-rear direction L and a pair of second fold lines FL2 extending in the front-rear direction L.
  • the pair of first fold lines FL1 and the pair of second fold lines FL2 are fold lines for folding the absorber 40, and are formed in a state in which the absorber 40 is folded.
  • the absorber 40 is folded at four locations by a pair of first fold lines FL1 and a pair of second fold lines FL2, and is laminated in a plurality of layers.
  • the pair of first fold lines FL1, the pair of second fold lines FL2, and the first fold line FL1 and the second fold line FL2 are separated from each other in the width direction W.
  • the second fold line FL ⁇ b> 2 is wider than the first fold line FL ⁇ b> 1 in the unfolded state of the absorber 40 (the state where the absorber 40 is not folded by the first fold line FL ⁇ b> 1 and the second fold line FL ⁇ b> 2).
  • the second fold line FL2 is wider than the first fold line FL1 in the width direction W.
  • the absorbent body 40 includes a central absorbent layer 401 located between the pair of first fold lines FL1 and a pair of first side parts located between the first fold line FL1 and the second fold line FL2. It has the absorption layer 402 and a pair of 2nd side part absorption layer 403 located in the outer side of the width direction W rather than 2nd fold line FL2.
  • the 1st side part absorption layer 402 and the 2nd side part absorption layer 403 are arrange
  • the central absorbent layer 401 is a region between the pair of first fold lines FL1 including the center of the absorbent body 40 in the width direction W.
  • the first side absorption layer 402 is located on both sides of the central absorption layer 401 in the expanded state, and is a region between the first fold line FL1 and the second fold line FL2.
  • the second side absorption layer 403 is located on both sides of the central absorption layer 401 and the pair of first side absorption layers 402 in the unfolded state, and is a region between the outer side in the width direction than the second fold line FL2. is there.
  • the central absorption layer 401, the first side absorption layer 402, and the second side absorption layer 403 are continuous in the width direction W.
  • the central absorbent layer 401, the first side absorbent layer 402, and the second side absorbent layer 403 are covered with one continuous core wrap 40b.
  • the core wrap 40b straddles the central absorbent layer 401, the first side absorbent layer 402, and the second side absorbent layer 403.
  • the absorber 40 is valley-folded with respect to the wearer by the first fold line FL1, and is mountain-folded with respect to the wearer by the second fold line FL2.
  • the first side absorbent layer 402 is disposed on the skin facing surface side T1 of the central absorbent layer 401
  • the second side is disposed on the skin facing surface side T1 of the first side absorbent layer 402.
  • a partial absorption layer 403 is disposed.
  • the second side part absorption layer 403 should just be arrange
  • the pair of second fold lines FL2 are separated in the width direction W. Only the central absorption layer 401 is disposed between the pair of second folding lines FL2.
  • a region between the pair of second fold lines FL ⁇ b> 2 constitutes a central region 44 that is disposed at the center in the width direction W of the absorber 40 and has the central absorbent layer 401.
  • the region between the first fold line FL1 and the second fold line FL2 is disposed on both outer sides in the width direction W of the central region 44, and the central absorption layer 401, the first side absorption layer 402, and the second side portion.
  • a side region 45 having the absorption layer 403 is formed.
  • the absorber 40 has at least a central region 44 and a side region 45.
  • the thickness of the central region 44 is thinner than the thickness of the side region 45.
  • the central region 44 has a thickness of 3.8 to 4.4 mm
  • the side region 45 has a thickness of 5.0 mm to 5.4 mm.
  • the center region 44 is recessed to the non-skin facing surface side T2 from the side region 45.
  • the center region 44 is recessed to the non-skin facing surface side T2, and a space S1 extending in the front-rear direction L is formed between the wearer and the absorber 40.
  • the body fluid discharged to the crotch region by the space S1 can be diffused in the front-rear direction L, and it is easy to effectively utilize the absorption performance over the entire front-rear direction of the absorber 40.
  • the inner edge (side portion on the central region 44 side) of the side region 45 swells as the body fluid is absorbed.
  • the thickness difference between the side region 45 and the central region 44 becomes large, the volume of the space S1 can be secured, and the absorption performance can be more effectively utilized over the entire region in the front-rear direction of the absorber 40.
  • the outer edge of the second side absorption layer 403 is located outside the first fold line FL1 in the width direction W. Only the second side absorption layer 403 is disposed outside the first fold line FL1 in the width direction W.
  • the second side absorption layer 403 located on the outermost side in the width direction is pressed inward in the width direction W. If the second side absorbent layer 403 is deformed so as to rise to the wearer side, the walls by the second side absorbent layer 403 can be provided relatively high on both sides of the central region 44. Therefore, lateral leakage of body fluid can be suppressed, and excrement leakage can be further suppressed.
  • the outer edge 40E of the folded absorbent body 40 is disposed around the wearer's leg.
  • the outer edge 40E of the absorber 40 is the outer edge of the second side absorbent layer 403. Only the second side absorption layer 403 is disposed on the outer edge 40E of the folded absorbent body 40 and is relatively thin. Therefore, the uncomfortable feeling around the wearer's leg can be reduced.
  • the basis weight of the absorbent material of the first side absorbent layer 402 is lower than the basis weight of the absorbent material of the central absorbent layer 401 and lower than the basis weight of the absorbent material of the second side absorbent layer 403.
  • the central absorbent layer 401 has pulp and SAP
  • the first side absorbent layer 402 has substantially no absorbent material.
  • the first side absorbent layer 402 has zero basis weight of the designed absorbent material such as SAP, but may have SAP or pulp mixed from the central absorbent layer or the like in the manufacturing process.
  • the basis weight of the pulp of the central absorbent layer 401 and the basis weight of the pulp of the second side absorbent layer 403 are higher than the basis weight of the pulp of the first side absorbent layer 402.
  • the 1st side absorption layer 402 may contain the pulp of the basic weight lower than the center absorption layer 401 grade
  • the basis weight of the absorbent material of the first side absorbent layer 402 may be the same as the basis weight of the absorbent material of the central absorbent layer 401, or the absorbent material of the second side absorbent layer 403. The basis weight may be the same.
  • the basis weight of the pulp of the 1st side part absorption layer 402 is low compared with the center absorption layer 401 and the 2nd side part absorption layer 403, it can suppress that the thickness of the side part area
  • the basis weight of the pulp of the central absorbent layer 401 is higher than the basis weight of the pulp of the first side absorbent layer 402, body fluid can easily migrate from the first side absorbent layer 402 to the central absorbent layer 401. It becomes easy to guide the body fluid to the central absorbent layer 401 located on the skin facing surface side T2.
  • the first fold line FL1 and the second fold line FL2 are formed with a difference in rigidity due to a difference in basis weight of the pulp. Therefore, it becomes easier to fold the absorber 40 based on the first fold line FL1 and the second fold line FL2.
  • the thickness of the 1st side part absorption layer 402 is thinner than the thickness of the center absorption layer 401, and is thinner than the thickness of the 2nd side part absorption layer 403.
  • the first fold line FL1 and the second fold line FL2 are boundaries where the thickness and basis weight of the absorber 40 change, and are boundaries where the rigidity changes. Therefore, it is easy to fold the absorber 40 from the first fold line FL1 and the second fold line FL2.
  • the absorber has a wall portion 46 that extends from the side region 45 toward the central region 44 toward the non-skin facing surface.
  • the wall portion 46 is a portion extending from the thickest portion in the side region 45 to the central region 44 side.
  • the basis weight of the side region 45 is higher than the basis weight of the central region 44. Since the center area 44 has a lower basis weight than the side area 45, it is less susceptible to pressure than the side area when the absorbent article is pressed in the thickness direction.
  • the said basic weight is a basic weight which combined the absorption core 40a which has a pulp and a superabsorbent polymer, and the core wrap 40b. Further, the basis weight of the superabsorbent polymer in the side region 45 is higher than the basis weight of the superabsorbent polymer in the central region 44.
  • the basis weight of the side region 45 is a total basis weight of the central absorbent layer 401, the first side absorbent layer 402, and the second side absorbent layer 403 laminated in the side region 45.
  • the side region 45 Since the basis weight of the superabsorbent polymer is relatively high, the side region 45 is likely to swell when absorbing body fluid. As the side region 45 swells, the volume of the space between the wearer and the absorbent body becomes larger, the body fluid continues to diffuse in the front-rear direction, and the absorption performance is effectively utilized throughout the front-rear direction of the absorbent body 40. It becomes easy.
  • the basis weight of the pulp in the side region 45 is higher than the basis weight of the pulp in the central region 44. Since the basis weight of the pulp is relatively high, the side region 45 tends to be thick in a state before the body fluid is absorbed. Further, since the side area 45 has a high basis weight of SAP, it is likely to be thick even in a state after absorption of body fluid. Therefore, it is possible to continue to secure the volume of the space S1 extending in the front-rear direction between the wearer and the absorbent body, diffuse body fluid in the front-rear direction L, and effectively utilize the absorption performance over the entire area of the absorbent body 40 in the front-rear direction L. It becomes easy to do.
  • the density of the side region 45 is higher than the density of the central region 44.
  • the density of the side region 45 in the present embodiment is 0.172 to 0.186 g / m 3
  • the density of the central region 44 is 0.106 to 0.122 g / m 3 . Since the density of the side region 45 is higher than the density of the central region 44, the body fluid drawn into the central region 44 is easily guided to the side region 45. The body fluid can be diffused in the width direction W, and it becomes easy to effectively utilize the absorption performance over the entire width direction of the absorber.
  • the absorber 40 of this Embodiment is obtained by compressing to the thickness direction T in the state which has arrange
  • the density can be measured by cutting out a sample from each of the central region 44 and the side region 45 and using the measurement method described above.
  • the length of the side region 45 in the width direction W is equal to or greater than the thickness of the side region 45 after absorbing the body fluid. Even if the absorbent body 40 is deformed at the time of wearing because the length in the width direction W of the side region 45 is not less than the thickness after absorbing the body fluid in the side region 45, the side absorption layer and the central absorption It is easy to maintain the state in which the layers overlap, and it is easy to continue to absorb body fluids that are repeatedly discharged.
  • the thickness after absorbing the body fluid in the side region 45 is a thickness in a state where the absorber 40 has absorbed the maximum amount of body fluid.
  • the length in the width direction W of the side region 45 and the thickness of the side region 45 after absorbing the body fluid is 8 mm.
  • the core wrap 40b is disposed on the skin facing surface side T1 of the central absorbent layer 401 and the non-skin facing surface side T2 of the first side absorbent layer 402.
  • the core wrap 40b overlaps at least two layers.
  • body fluid can be easily guided from the central absorbent layer 401 side to the side absorbent layer side. It becomes easy to effectively utilize the absorption performance over the entire region of the absorber 40 in the thickness direction.
  • the core wrap 40b of this Embodiment is laminated
  • the top sheet 50 has an application region 53 to which a lotion is applied and a non-application region 54 to which no lotion is applied.
  • the application region 53 and the non-application region 54 each extend in the front-rear direction L.
  • the application region 53 is arranged with an interval in the width direction W
  • the non-application region 54 is arranged with an interval in the width direction W.
  • the application region 53 and the non-application region 54 are alternately arranged in the width direction W.
  • “extending along the front-rear direction” may be a configuration having at least a certain range in the front-rear direction, and includes a configuration extending in the front-rear direction while being inclined with respect to the front-rear direction.
  • the application region 53 is provided at least on the skin facing surface side of the top sheet 50.
  • the lotion is applied from the skin facing surface side T ⁇ b> 1 of the top sheet 50. Therefore, the amount of lotion is larger on the skin facing surface side T1 than on the non-skin facing surface side of the top sheet.
  • the type of lotion is not limited, but for example, a hydrophobic lotion can be used.
  • the lotion of the present embodiment comprises a styrenic elastomer and a hydrocarbon oil that can maintain a gel state at 38 ° C. and is a block copolymer of triblock or higher containing a polystyrene hard segment and a soft segment.
  • a hydrophobic lotion Since the lotion has hydrophobicity, the hydrophilicity of the application region 53 is lower than the hydrophilicity of the non-application region 54. According to such a lotion, since the gel can maintain a gel-like state even at 38 ° C., the lotion does not melt due to the body temperature of the wearer when the disposable diaper is worn. Since the lotion is difficult to penetrate the non-skin facing surface of the top sheet, the bonding state between the top sheet and the core wrap sheet is not affected and the bonding state can be stably maintained for a long time. it can.
  • the hydrophobic lotion is intermittently applied to the skin facing surface of the top sheet composed of hydrophilic fibers, etc., so that the hydrophobic lotion is applied to the skin facing surface of the top sheet. While the region 53 is formed, since the inside of the top sheet 50 has hydrophilicity, the synergistic action of the hydrophobic water-repellent action in the application region 53 and the hydrophilic water-absorbing action inside the top sheet 50, It is possible to form a state in which excrement such as urine supplied on the skin facing surface of the top sheet 50 is easily drawn into the top sheet 50 through the non-application area 54 where the lotion is not applied. .
  • the liquid repellency of the top sheet can be improved while maintaining the liquid permeability in the thickness direction.
  • the hydrophobic lotion is The presence of the excrement on the skin facing surface inhibits the excretion from leaching to the skin facing surface of the top sheet, so that liquid return of the liquid excretion that has once penetrated into the inside can be effectively prevented.
  • the disposable diaper can be a disposable diaper having excellent surface dryness while maintaining liquid permeability in the thickness direction. By realizing good dryness, it is possible to suppress stuffiness and rash of the buttocks.
  • the application areas 53 and the non-application areas 54 are alternately arranged, and the lotion applied to the application area 53 penetrates into the non-application areas 54. Since the application region 53 is provided on the skin facing surface side T1 of the top sheet 50, the lotion that has penetrated into the non-application region 54 also penetrates a lot on the skin facing surface side T1 of the top sheet 50. On the skin facing surface side T1 of the non-application area 54, a part of the lotion penetrates and the hydrophilicity thereof decreases. Therefore, in the non-application area 54, the hydrophilicity of the top sheet 50 changes in the thickness direction T, and the hydrophilicity increases from the skin facing surface side T1 toward the non-skin facing surface side T2.
  • the body fluid discharged onto the top sheet 50 is guided from the application region 53 to the non-application region 54.
  • the body fluid guided to the non-application area 54 easily moves to the non-skin facing surface side T2 having higher hydrophilicity and is drawn to the absorber side. Therefore, body fluid can be drawn quickly.
  • the application area 53 is provided at least in an area overlapping the central area 44 of the top sheet 50.
  • the center area 44 has a lower basis weight than the side area 45 and is less susceptible to pressure than the side area 45 when the disposable diaper 10 is pressed in the thickness direction T.
  • the central region 44 has a thickness thinner than that of the side region 45 and is recessed to the non-skin facing surface side T ⁇ b> 2 rather than the side region 45. Therefore, the region overlapping the central region 44 is difficult to be pressed in the thickness direction T.
  • a coating region 53 and a non-coating region 54 are arranged in a region overlapping with the central region 44. Since the lotion is attached to the region overlapping the central region 44, the lotion of the top sheet 50 is difficult to move to the absorber side.
  • the lotion continues to remain on the top sheet 50, the effect of the lotion is easily continued.
  • region 54 are provided along the front-back direction L, a bodily fluid can be spread
  • the application region 53 is also provided in a region overlapping the side region 45 of the top sheet 50.
  • absorbent articles are distributed in a state where they are laminated in the thickness direction. Since the basis weight of the side region 45 is higher than the basis weight of the central region 44, the top sheet 50 that overlaps the side region 45 in a state before use (a state where the absorbent article is opened from a packaging body for packaging), It is pressed more than the top sheet 50 that overlaps the central region 44.
  • the basis weight of the lotion of the application region 53 that overlaps the central region 44 is higher than the basis weight of the lotion of the application region 53 that overlaps the side region 45 in a state where the package is opened from the package that wraps the disposable diaper.
  • the region overlapping with the central region 44 is disposed in the center of the absorbent body 40 in the width direction W, and a large amount of body fluid is discharged from the excretion opening. Since the basis weight of the lotion in the area overlapping with the central area 44 is high, the drawability can be effectively exhibited in the area where much body fluid is discharged.
  • the application region 53 and the non-application region 54 are provided in a region overlapping the wall portion 46 in the top sheet 50.
  • the wall portion 46 extends from the side region 45 toward the central region 44 toward the non-skin facing surface side T2, and is less susceptible to body pressure than a region extending in the planar direction. Therefore, the lotion tends to remain in the top sheet 50, and the function of drawing body fluid can be easily continued.
  • excrement drawn into the central region 44 can be drawn into the side region 45 by the non-application region 54 provided in the region overlapping the wall portion 46.
  • the excrement can be diffused in the width direction W, and the body fluid can be drawn more easily.
  • the area ratio is preferably about 1% to about 50%, more preferably about 5% to about 30%, and particularly preferably about 10% to about 50%.
  • the area ratio is 15%. If the lotion is coated at an area ratio of less than 1% with respect to the area of the top sheet 50, the lotion coating area is small and the hydrophobicity on the skin facing surface of the top sheet 50 is insufficient.
  • the amount of lotion applied to the skin facing surface of the top sheet 50 is usually in the range of 1 to 30 g / m 2 , preferably in the range of 6 to 15 g / m 2 , Preferably, it is in the range of 6 to 10 g / m 2 . If the coating amount of the lotion is less than 6 g / m 2 , the coating amount of the lotion is small, and the hydrophobicity on the skin facing surface of the top sheet 50 is insufficient. Moreover, when the coating amount of the lotion exceeds 15 g / m 2 , the degree of repelling due to the hydrophobicity of the lotion increases, and thus it is difficult to obtain liquid permeability in the thickness direction.
  • the length in the width direction of the non-application area 54 is 1 mm or more and 10 mm or less.
  • the liquid repellency increases and the liquid permeability decreases.
  • the length in the width direction of the non-application area 54 is increased, the liquid repellency is lowered and the liquid permeability is increased.
  • the length in the width direction W of the non-application area 54 is 1 mm or more and 10 mm or less, the liquid repellency and liquid permeability of the top sheet 50 can be compatible.
  • the area ratio of the lotion that has moved from the application area 53 in the non-application area 54 becomes higher.
  • the area where the hydrophilic gradient in the thickness direction T is provided increases, and the liquid easily moves toward the absorber due to the hydrophilic gradient, and the liquid repellency is improved.
  • region 54 in the width direction W becomes short, the area ratio of a lotion will become high and the hydrophilicity of the whole top sheet will become low. It becomes difficult to hold the body fluid with the top sheet, and the liquid permeability decreases.
  • the area ratio of the lotion transferred from the application area 53 in the non-application area 54 is reduced, and the area provided with the hydrophilic gradient in the thickness direction T is reduced, which is favorable. It becomes difficult to obtain a good liquid repellency.
  • region 54 becomes long, the area ratio of a lotion will become low and the hydrophilicity of the top sheet 50 whole will become high. It becomes easy to hold body fluid in the top sheet 50, and the liquid permeability improves.
  • “Liquid repellency” means the ease with which the liquid excrement supplied on the skin-facing surface of the top sheet 50 is spread from the skin-facing surface to the non-skin facing surface side. Quantitative evaluation can be made based on the time (ie, “bake rate”) required to make the top sheet 50 from the skin facing surface to the non-skin facing surface and disappear from the top sheet 50. Further, in the present specification, “liquid permeability” means that the liquid excrement supplied on the skin facing surface of the top sheet 50 penetrates into the top sheet 50 from the skin facing surface. It means easiness, and the liquid excrement can be quantitatively evaluated by the time (ie, “penetration rate”) required for the liquid excrement to completely penetrate into the top sheet 50 from the surface of the top sheet 50 facing the skin.
  • the permeation speed and the printing speed can be measured by the following steps 1 to 7.
  • Step 1 A sample to be measured is placed in an oven set at 40 ° C. assuming the body temperature of the wearer. The sample to be measured is in a state of being folded in half with respect to the center in the front-rear direction so that the skin facing surface sides face each other.
  • Step 2 Ten measurement samples folded in half are prepared, stacked so as to overlap in the thickness direction, and a 3.5 kg weight is placed on the top. Leave in the oven for a day.
  • Step 3 Remove from the oven and leave at room temperature for 1 hour or more with the weight removed.
  • Step 4 The sample to be measured is developed, and the dripping position of the simulated urine is set in an area where the top sheet on the skin facing surface side is arranged and does not overlap with the fold line.
  • Step 5 A cylinder having a diameter of 60 mm is prepared, and the cylinder is set so that the center of the cylinder is a dropping position.
  • Step 6 40 ml of colored simulated urine is dropped. The stopwatch is started simultaneously with the dripping, and the time from the dripping start until the time when all the simulated urine is absorbed by the top sheet is measured, and this time is taken as the penetration rate.
  • Step 7 The time (seconds) when all the simulated urine dripped on the skin facing surface of the top sheet 50 has moved to the absorber side is measured, and this measured time is taken as the burning speed (seconds).
  • the simulated urine is prepared by dissolving 200 g of urea, 80 g of sodium chloride, 8 g of magnesium sulfate, 3 g of calcium chloride, and about 1 g of a pigment (blue No. 1) in 10 L of ion-exchanged water.
  • FIG. 5 is a cross-sectional view schematically showing a cross section along the width direction W of the top sheet 50 and the absorber 40.
  • the top sheet 50 has a convex portion 52 and a concave portion 51.
  • the recessed part 51 is recessed in the non-skin opposing surface side T2 rather than the convex part 52.
  • FIG. The top sheet 50 has a ridge groove structure having a ridge composed of convex portions 52 and a groove composed of concave portions 51.
  • the concave portion 51 and the convex portion 52 each extend in the front-rear direction L.
  • the concave portions 51 are arranged with an interval in the width direction W, and the convex portions 52 are arranged with an interval in the width direction W.
  • the concave portions 51 and the convex portions 52 are alternately arranged in the width direction W.
  • the top sheet 50 has the recessed part 51 and the convex part 52, and the center area
  • region 44 are hard to be crushed by body pressure, and are easy to maintain the shape.
  • the bodily fluid can be diffused in the front-rear direction L by the convex portions 52 and the concave portions 51 of the top sheet 50, and it becomes easy to effectively utilize the absorption performance over the entire region of the absorber 40 in the front-rear direction.
  • the concave portion 51 is a portion where the basis weight of the fiber is lower than the average basis weight of the fiber of the top sheet 50
  • the convex portion 52 is a portion where the basis weight of the fiber is higher than the average basis weight of the fiber of the top sheet 50.
  • the thickness T51 of the concave portion 51 is thinner than the thickness T52 of the convex portion 52.
  • the density of the concave portions 51 is higher than the density of the convex portions 52. According to such a configuration, a difference in density occurs between the convex portion 52 and the concave portion 51. Due to this density difference, the body fluid quickly moves from the convex portion of the convex portion 52 to the concave portion 51. Therefore, it becomes easy to draw body fluid by the recessed part 51 of a top sheet, and can improve absorptivity.
  • region 53 should just be provided in the convex part 52 at least, and the non-application area
  • the hydrophilicity of the skin facing surface side T1 of the top sheet 50 will become low. If the lotion is not attached to the recess 51, the hydrophilicity of the top sheet 50 on the skin facing surface side is maintained in a high state. Therefore, the hydrophilicity increases from the application region 53 of the convex portion 52 toward the non-application region 54 of the concave portion 51.
  • the body fluid easily shifts to the non-skin facing surface side with higher hydrophilicity, is drawn into the absorber side, and is quickly drawn into the absorber side.
  • the body fluid can be diffused in the front-rear direction by the convex portions and the concave portions of the top sheet, and it becomes easy to effectively utilize the absorption performance over the entire region in the front-rear direction of the absorbent body.
  • region 54 of this Embodiment are provided in the convex part 52 and the recessed part 51, respectively.
  • the top sheet 50 is disposed across the skin facing surface side T1 of the central region 44 and the skin facing surface side T1 of the side region 45.
  • the top sheet 50 extending in the width direction from the skin facing surface side T ⁇ b> 1 of the central region 44 does not extend between the central absorbent layer 401 and the first side absorbent layer 402, but on the skin facing surface side T ⁇ b> 1 of the side region 45. Extend.
  • the top sheet 50 is not disposed between the central absorbent layer 401 and the first side absorbent layer 402 and between the first side absorbent layer 402 and the second side absorbent layer 403.
  • the top sheet 50 is disposed across the central region 44 and the side region 45 and is not caught between the central absorbent layer 401 and the side absorbent layer, the density of the top sheet 50 in the planar direction of the top sheet 50 It is difficult for the difference to occur, and urine can be prevented from staying locally on the surface or inside of the top sheet 50.
  • a space S2 surrounded by the skin facing surface of the central region 44, the skin facing surface of the side region 45, and the top sheet 50 is formed at the boundary between the central region 44 and the side region 45.
  • the body fluid can be temporarily held or the body fluid can be diffused in the front-rear direction.
  • the disposable diaper 10 is provided with a first joining portion R1, a second non-joining portion NR2, a third joining portion R3, and a third non-joining portion NR3 in a folded state where the absorber 40 is folded. (See FIG. 6).
  • Each joint is a region where an adhesive such as a hot-melt adhesive is disposed, and each non-joint is bonded more than a region where no adhesive such as a hot-melt adhesive is disposed, or a joint.
  • FIG. 6 is a cross-sectional view schematically illustrating a wearing state of the disposable diaper.
  • the disposable diaper 10 is attached to the wearer, the disposable diaper 10 is sandwiched between the wearer's legs. The disposable diaper 10 is applied with a force from the outside in the width direction W toward the inside in the width direction W.
  • the force from the outer side in the width direction toward the inner side in the width direction is the second side absorption layer 403.
  • the 2nd side part absorption layer 403 absorbs the force which goes to the inner side of the width direction from the outer side of the width direction by changing. Therefore, the central absorbent layer 401 can be prevented from being deformed by the force.
  • the first joint portion R1 is a portion where the skin facing surface of the central absorbent layer 401 and the non-skin facing surface of the first side absorbent layer 402 are joined.
  • the first joint R1 may be provided on the entire surface where the skin-facing surface of the central absorbent layer 401 and the non-skin-facing surface of the first side absorbent layer 402 face each other, or on a part of the facing surface. It may be provided.
  • the first joint R1 when a force is applied to the disposable diaper 10 from the outer side in the width direction toward the inner side in the width direction, the central absorbent layer 401 and the first side absorbent layer 402 are disposed. Is prevented from shifting, and the folding structure by the first folding line FL1 is easily maintained.
  • the second non-joint portion NR2 is a portion where the skin facing surface of the first side absorbent layer 402 and the non-skin facing surface of the second side absorbent layer 403 are not joined in the wearing state.
  • the second non-joint portion NR2 is provided on the entire surface where the skin facing surface of the first side absorption layer 402 and the non-skin facing surface of the second side absorption layer 403 face each other at least in the crotch region 25.
  • the second non-joined portion NR2 extends across the center of the disposable diaper 10 in the front-rear direction and extends in the front-rear direction in the crotch region 25.
  • the second non-joining portion NR2 of the present embodiment is a region where no adhesive is disposed, and is in a non-joined state even in the folded state.
  • the second non-joint portion NR2 is joined to the skin facing surface of the first side absorbent layer 402 and the non-skin facing surface of the second side absorbent layer 403, and is worn and outside in the width direction.
  • the structure which will be in a non-joining state earlier than a 1st junction part when the force which goes to the inner side of the width direction is applied may be sufficient.
  • the force is directed from the outside in the width direction to the inside in the width direction.
  • the second side absorption layer is deformed so that the left and right second side absorption layers 403 rise to the wearer side with the first side absorption layer 402 joined to the central absorption layer 401 as a starting point.
  • a space S3 is formed on the non-skin facing surface side T2 of the layer 403. Excrement can be held by the space S3 between the first side absorption layer 402 and the second side absorption layer 403, and leakage of excrement can be suppressed.
  • the third joint portion R3 is a portion where the second side absorption layer 403 and the non-skin surface sheet are joined. More specifically, in the third joint portion R3, the non-skin facing surface of the second side absorption layer 403 and the skin facing surface of the back sheet 60a as the non-skin surface sheet are joined.
  • the range in the front-rear direction L of the second side absorption layer 403 is the entire region in the front-rear direction L of the absorber 40.
  • the range of the third joint R3 in the width direction W is a certain range extending from the outer edge of the second side absorption layer 403 to the inside of the width direction W.
  • the third joint portion R3 is located outside the first fold line FL1 in the width direction W and is separated from the first fold line FL1.
  • a third non-joining portion NR3 is provided on the inner side in the width direction W than the third joining portion R3.
  • the third non-joint portion NR3 is a portion where the second side absorption layer 403 and the non-skin surface sheet are not joined.
  • the third non-joining portion NR3 straddles the center in the front-rear direction of the disposable diaper 10 and extends in the front-rear direction L in the crotch region 25.
  • the third non-joining part NR3 is inside the width direction W from the third joining part R3 and outside the width direction W from the first fold line FL1. In the region on the inner side in the width direction from the first fold line FL1, the central absorbent layer 401 and the back sheet 60a are joined.
  • the third junction R3 constitutes a junction region in the present invention, and the third non-joint portion NR3 constitutes a non-joint region in the present invention.
  • 2nd side part absorption layer 403 and back sheet 60a are joined by the 3rd joined part R3, and are not joined by the 3rd non-joined part NR3. Therefore, when a force is applied from the outer side in the width direction W to the inner side in the width direction W, the absorbent body 40 that comes into contact with the third non-joint portion NR3 with the third joint portion R3 as a base point rises to the wearer side.
  • the space S4 that is deformed and is surrounded by the second side absorbent layer 403, the back sheet 60a, and the central absorbent layer 401 can be provided at least in the crotch region 25 (see FIG. 6). Urine can be accommodated in the space S4.
  • urine can be diffused in the front-rear direction L by the space S4, and body fluid can be retained in the entire region of the absorber 40 in the front-rear direction L. Therefore, even if it is a case where it is used for a long time, a body fluid can be absorbed with the absorber 40 whole, and the leakage of a body fluid can be suppressed.
  • moisture can be diffused in the front-rear direction L by the space S4, and stuffiness can be suppressed and the wearing feeling can be improved.
  • the third joint R3 is disposed in a region overlapping the inner edge of the elastic member 77.
  • the inner edge of the elastic member 77 is the inner edge of the elastic member located on the innermost side in the width direction.
  • the inner edge of the elastic member 77 of the three-dimensional gather contracts due to the expansion and contraction of the elastic member 77 and stands on the wearer side.
  • the absorber in the region overlapping the inner edge of the elastic member 77 is joined to the backsheet 60a by the third joint R3 and is not easily deformed. Therefore, when the three-dimensional gather contracts, the shape of the absorber 40 is easily maintained, and the three-dimensional gather is easily raised from the absorber 40 toward the wearer.
  • the space which accommodates excrement can be provided widely between the solid gathers and the absorber 40, and leakage of excrement can be suppressed. As a result, excrement leakage can be effectively suppressed while the folded structure of the absorber 40 is maintained.
  • Example 1 comparative evaluation of the absorbent performance of absorbent articles with different top sheets will be described.
  • the printing speed was evaluated using the absorbent articles according to Examples 1 and 2 and the absorbent articles according to Comparative Examples 1 to 3.
  • the absorbent bodies of the absorbent articles according to Example 1, Example 2, and Comparative Example 1 are folded based on the first fold line and the second fold line, similarly to the absorbent body of the above-described embodiment.
  • the absorbent body of the absorbent article according to Comparative Example 2 and Comparative Example 3 is not folded at the crease base, but has the same thickness throughout.
  • the application areas are arranged at intervals in the width direction.
  • regions of the top sheet which concerns on Example 1 and Comparative Example 3 is 2 mm.
  • regions of the top sheet which concerns on Example 2 is 5 mm.
  • the top sheets according to Comparative Example 1 and Comparative Example 2 are not coated with lotion.
  • the printing speed was measured by repeating Step 8: Steps 6 and 8 twice in addition to Steps 1 to 7 described above, and dropping simulated urine for a total of 40 ml ⁇ 3 times.
  • FIG. 7 the result of the printing speed of the absorbent article which concerns on Example 1 and 2 and the printing speed of the absorbent article which concerns on Comparative Examples 1-3 is shown.
  • FIG. 8 shows photographs of the top sheet after 30 seconds, 1 minute, 2 minutes, 3 minutes, and 5 minutes from the start of dropping when the simulated urine was dropped 3 times. Note that the dropping position in the measurement of the printing speed in the example is in the central region.
  • the printing speed of the absorbent articles according to Examples 1 and 2 and the printing speed of the absorbent articles according to Comparative Examples 1 to 3 are not significantly different. It was. However, in the second dropping (at the time of dropping 80 ml) and the third dropping (at the time of dropping 120 ml), the printing speed of the absorbent articles according to Examples 1 and 2 is the absorption according to Comparative Examples 1 to 3. It was significantly faster than the printing speed of the sex goods.
  • the absorbent articles according to Examples 1 and 2 were found to have good liquid printing properties. Moreover, it turned out that the comparison of the absorbent article which concerns on Example 1 and 2 has 2 mm rather than 5 mm as the space

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  • Vascular Medicine (AREA)
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Abstract

Le but de la présente invention est de fournir un article absorbant avec lequel l'effet d'une lotion appliquée sur une feuille supérieure peut facilement être maintenu. L'invention concerne une couche jetable (10) comprenant une direction longitudinale (L), une direction de largeur (W) qui est orthogonale à la direction longitudinale, un corps absorbant (40), et une feuille supérieure (50) qui est disposée sur un côté de surface faisant face à la peau du corps absorbant. Le corps absorbant comprend une région centrale (44) disposée dans le centre dans la direction de la largeur du corps absorbant, et des régions latérales (45) disposées des deux côtés dans la direction de la largeur de la région centrale. Le poids de base des régions latérales est supérieur au poids de base de la région centrale. Une région d'application (53) à laquelle une lotion a été appliquée est disposée dans une région de la feuille supérieure qui chevauche la région centrale.
PCT/JP2016/085441 2016-11-29 2016-11-29 Article absorbant WO2018100650A1 (fr)

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JP2020174996A (ja) * 2019-04-19 2020-10-29 ユニ・チャーム株式会社 吸収性物品
JP2020174995A (ja) * 2019-04-19 2020-10-29 ユニ・チャーム株式会社 吸収性物品
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WO2020213733A1 (fr) * 2019-04-19 2020-10-22 ユニ・チャーム株式会社 Article absorbant
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JP2020174995A (ja) * 2019-04-19 2020-10-29 ユニ・チャーム株式会社 吸収性物品
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