WO2015015970A1 - 吸収性物品 - Google Patents

吸収性物品 Download PDF

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Publication number
WO2015015970A1
WO2015015970A1 PCT/JP2014/067167 JP2014067167W WO2015015970A1 WO 2015015970 A1 WO2015015970 A1 WO 2015015970A1 JP 2014067167 W JP2014067167 W JP 2014067167W WO 2015015970 A1 WO2015015970 A1 WO 2015015970A1
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WO
WIPO (PCT)
Prior art keywords
region
bulky
disposable diaper
pair
space
Prior art date
Application number
PCT/JP2014/067167
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
美奈 富田
Original Assignee
花王株式会社
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 花王株式会社 filed Critical 花王株式会社
Priority to CN201490000917.5U priority Critical patent/CN205672142U/zh
Priority to RU2016105480U priority patent/RU168782U1/ru
Publication of WO2015015970A1 publication Critical patent/WO2015015970A1/ja

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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
    • A61F13/51121—Topsheet, i.e. the permeable cover or layer facing the skin characterised by the material
    • 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
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
    • 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
    • A61F13/51104—Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections
    • 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
    • A61F13/51104—Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections
    • A61F13/51108—Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections the top sheet having corrugations or embossments having one axis relatively longer than the other axis, e.g. forming channels or grooves in a longitudinal direction

Definitions

  • the present invention relates to an absorbent article such as a disposable diaper.
  • an absorbent article having a surface sheet with an uneven structure is known.
  • a plurality of first convex portions are provided on the skin facing surface of the central region disposed in the central portion extending in the longitudinal direction, and a pair of side regions disposed on the left and right sides of the central region.
  • the disposable diaper provided with the surface sheet in which many 2nd convex parts whose height is higher than a 1st convex part was provided in each skin opposing surface is described.
  • the cushioning property at the time of wearing is good, for example, there is little wet back after soft stool absorption, and the feeling of use is good.
  • the height of the multiple second convex portions provided in the pair of side regions is higher than the height of the multiple first convex portions provided in the central region. Therefore, for example, it is excellent in preventing the side leakage of soft stool.
  • the disposable diaper described in Patent Document 1 has a diaper width direction in which a plurality of second convex portions provided in each of the pair of side regions are arranged in series across the entire diaper longitudinal direction. A plurality of rows are formed. That is, in the disposable diaper described in Patent Document 1, a large number of second convex portions are provided from the back side region of each of the pair of side regions to the entire longitudinal direction of the ventral region. Since the second convex portion is provided in this way, for example, soft stool excreted in the dorsal region is difficult to spread in the width direction in the dorsal region, and a large amount of loose stools easily spread to the crotch region through the central region. .
  • the present invention relates to providing an absorbent article that can satisfy the aforementioned needs.
  • the present invention comprises a liquid-permeable surface sheet disposed on the skin facing surface side, a liquid-impermeable back sheet disposed on the non-skin facing surface side, and an absorber disposed between these both sheets.
  • the present invention relates to an absorbent article having a vertically long absorbent main body.
  • the absorbent main body is divided into a ventral region located on the wearer's ventral side when worn, a dorsal region located on the dorsal side, and a crotch region disposed between the ventral region and the dorsal region. ing.
  • the surface sheet is made of a bulky nonwoven fabric, and the surface sheet excluding the back side region has the highest apparent density in the center portion of the crotch region on both side portions along the longitudinal direction of the absorbent main body. At least one pair of bulky regions having an apparent density lower than that of the portion is arranged.
  • FIG. 1 is a partially broken plan view of an unfolded disposable diaper according to an embodiment of the present invention as viewed from the surface sheet side.
  • 2 is a cross-sectional view taken along the line II of FIG.
  • FIG. 3 is a plan view of the absorbent core that constitutes the absorbent body of the disposable diaper shown in FIG. 1.
  • FIG. 4 is a plan view of the top sheet having the disposable diaper shown in FIG. 1.
  • FIG. 5 is a schematic view showing an example of a press roll used for manufacturing a deployable disposable diaper according to an embodiment of the present invention.
  • FIG. 6 is a plan view of an absorbent core used in a disposable diaper according to another embodiment of the present invention (corresponding to FIG. 3).
  • FIG. 7 is a plan view of an absorbent core used in a disposable diaper according to still another embodiment of the present invention (corresponding to FIG. 3).
  • FIG. 8 is a plan view of an absorbent core used in a disposable diaper according to still another embodiment of the present invention (corresponding to FIG. 3).
  • FIG. 9 is a plan view of an absorbent core used in a disposable diaper according to still another embodiment of the present invention (corresponding to FIG. 3).
  • FIG. 10 is a plan view of a topsheet used in the disposable diaper having the absorbent core shown in FIG. 6 which is another embodiment of the present invention (corresponding to FIG. 4).
  • FIG. 11 is a plan view of a topsheet used in the disposable diaper having the absorbent core shown in FIG. 7 which is another embodiment of the present invention (corresponding to FIG. 4).
  • FIG. 12 is a plan view of another topsheet used in the disposable diaper having the absorbent core shown in FIG. 7 which is another embodiment of the present invention (corresponding to FIG. 4).
  • FIG. 13 is a plan view of a top sheet used for a disposable diaper having the absorbent core shown in FIG. 8 which is another embodiment of the present invention (corresponding to FIG. 4).
  • FIG. 14 is a plan view of a top sheet used for a disposable diaper having the absorbent core shown in FIG. 9 which is another embodiment of the present invention (corresponding to FIG. 4).
  • FIG. 15 is a perspective view of a topsheet provided in the disposable diaper used when producing the disposable diapers of Example 1 and Comparative Examples 1 to 3.
  • FIG. 16 is a perspective view of a topsheet provided in the disposable diaper used when producing the disposable diapers of Example 2 and Comparative Examples 4 to 6.
  • FIG. 1 is a partially cutaway plan view of an unfolded disposable diaper according to an embodiment of the present invention as viewed from the top sheet side
  • FIG. 2 is a cross-sectional view taken along the line II of FIG. ing.
  • 3 shows a plan view of the absorbent core of the absorbent body having the disposable diaper shown in FIG. 1
  • FIG. 4 shows a plan view of the top sheet having the disposable diaper shown in FIG. Yes.
  • the disposable diaper 1 of this embodiment (hereinafter also referred to as “diaper 1”) has a liquid-permeable surface sheet 2 disposed on the skin facing surface side and a non-skin facing surface side. It has a vertically long absorbent main body 5 provided with a hardly liquid permeable back sheet 3 disposed and an absorbent body 4 disposed between both sheets 2 and 3.
  • the absorptive main body 5 includes a ventral region A located on the abdomen side of the wearer when worn, a dorsal region B located on the dorsal side, and a crotch region C disposed between the ventral region A and the dorsal region B It is divided into. As shown in FIG.
  • the diaper 1 is formed symmetrically with respect to a center line CL extending in the longitudinal direction.
  • the abdominal region A, the back region B, and the crotch region C are determined by dividing into the following diapers 1) to 3).
  • a region corresponding to the constricted position of the outer packaging body is defined as a crotch region C, and on the stomach side of the wearer from the crotch region C
  • the region located is defined as a ventral region A
  • the region located on the back side of the wearer from the crotch region C is defined as a dorsal region B.
  • the above-mentioned constricted position refers to a region where the width of the outer packaging body is narrowed by binding the outer packaging body from both side portions along the Y direction, which will be described later, to the center in the width direction (X direction, which will be described later).
  • the outer packaging referred to here means a sheet disposed on the outermost side of the diaper on the non-skin side, and generally refers to a nonwoven fabric disposed on the outer side of a liquid-impermeable film sheet. In the case of only the poorly permeable film, the film is regarded as an envelope.
  • the film sheet and the non-woven fabric are the same size, or the non-woven fabric as an envelope is several millimeters larger.
  • the outer envelope protrudes from the crotch C in the width direction and is wide.
  • the region including the panel is defined as the back side region B.
  • An abdominal side corresponding to the length, that is, a part where the panels overlap when worn is defined as an abdominal area A, and a space between the back side area B and the abdominal area A is defined as a crotch area C.
  • the absorbent main body 5 of the diaper 1 is in a stretched state (hereinafter also referred to as “Y direction”.
  • Y direction direction parallel to the center line CL).
  • 2) has a ventral region A, a crotch region C, and a dorsal region B.
  • the abdomen A, the crotch C, and the dorsal B are located in the crotch region C in a state where the diaper 1 is extended, and are located closer to the wearer than the crotch region.
  • the region is defined as a ventral region A, and the region located on the back side of the wearer relative to the crotch region is defined as a dorsal region B (because it corresponds to the diaper classified as (1) above).
  • the direction orthogonal to the longitudinal direction (Y direction) will be described as the width direction of the diaper 1 (hereinafter also referred to as “X direction”).
  • a “skin opposing surface” is a surface distribute
  • the “skin facing surface” is a surface of the front and back surfaces of each member such as the surface sheet 2 that is directed to the side opposite to the wearer's skin side when worn.
  • the left and right side edges of the ventral region A and the left and right side edges of the back side region B extend outward in the width direction (X direction) from the left and right side edges of the crotch region C. ing.
  • the left and right side edges of the crotch region C are curved in an arc shape inward in the width direction (X direction), and the central part in the longitudinal direction (Y direction) is constricted inward as a whole. Yes.
  • the top sheet 2 and the back sheet 3 respectively extend outward from the left and right side edges and the front and rear end edges of the absorber 4 that is long in the longitudinal direction (Y direction).
  • the surface sheet 2 has the same length in the longitudinal direction (Y direction) as the length in the longitudinal direction (Y direction) of the back sheet 3, but as shown in FIG.
  • the dimension in the direction (X direction) is smaller than the dimension in the width direction (X direction) of the back sheet 3.
  • Each of the top sheet 2 and the back sheet 3 is joined to each other directly or through another member at the extended portion extending outward from the periphery of the absorbent body 4, and sandwiches and fixes the absorbent body 4. is doing.
  • the absorbent body 4 is composed of an absorbent core 41 in which particles of a water-absorbing polymer are held in an aggregate of fibers such as pulp fibers, and a core wrap sheet 42 that covers the absorbent core 41.
  • the absorbent core 41 and the top sheet 2 of the absorbent body 4 will be described in detail below.
  • a three-dimensional gather forming sheet 62 having elastic members 61 fixed in a stretched state in the Y direction is provided on both sides along the longitudinal direction (Y direction) of the diaper 1. It arrange
  • leg elastic members 63 for forming leg gathers are arranged in an extended state in the Y direction on both side portions along the longitudinal direction (Y direction) of the diaper 1. Leg gathers are formed by the contraction of the leg elastic members 63.
  • the waist part elastic member for waist gathers formation is distribute
  • the diaper 1 is a so-called unfolded diaper.
  • a pair of fastening tapes 7 and 7 are provided on both left and right edges of the dorsal region B.
  • a landing tape 8 for fastening the fastening tapes 7 is provided on the outer surface (non-skin facing surface).
  • the absorbent body 4 has an absorbent core 41, and the absorbent core 41 has a pulp-free space 41s that constitutes the absorbent core 41 as shown in FIGS. ing.
  • the space 41s of the absorbent core 41 included in the diaper 1 is pulped in an arc shape convex inward from both side edges along the longitudinal direction (Y direction) of the absorbent core 41 toward the center line CL. It is formed lacking.
  • the absorptive core 41 with which the diaper 1 is provided has the space part 41s formed lacking the pulp, a pulp is laminated
  • the basis weight of the low basis weight part is preferably as low as compared to other parts, and specifically, the ratio of the low basis weight part / high basis weight part is 70% or less, more preferably. If it is 50% or less, a sufficiently satisfactory effect can be obtained.
  • the absorbent body 4 included in the diaper 1 is formed by covering an absorbent core 41 having a space portion 41 s formed in an inwardly convex arc shape with a single core wrap sheet 42.
  • the surface sheet 2 consists of a bulky nonwoven fabric.
  • the top sheet 2 excluding the back region B has a central portion of the crotch region C on both side portions 5s and 5s along the longitudinal direction (Y direction) of the absorbent main body 5, as shown in FIGS.
  • At least a pair of bulky regions 9L having an apparent density lower than that of the portion 9h having the highest apparent density in 5m are arranged.
  • the bulky region 9L is disposed not only in the back side region B but also in the ventral region A, as shown in FIG.
  • the center portion 5m is a portion having a width (length in the X direction) of about 70 mm including the center line CL and extending along the center line CL in a state where the diaper 1 is extended.
  • the crotch region C is narrower in the width direction (X direction) than the center portion 5 m and is located outside the width direction (X direction).
  • Both side portions 5s, 5s and the central portion 5m extend from the ventral region A to the dorsal region B of the absorbent main body 5, that is, over the entire region in the longitudinal direction (Y direction).
  • the portion 9h with the highest apparent density may be in the region T of the central portion 5m of the crotch region C, and is determined by cutting out a portion in the range of 4 cm 2 as will be described later. The measurement of the apparent density will be described in detail below.
  • the most apparent dense portion 9h is first from within the region T in the central portion 5m of the crotch region C of the surface sheet 2 is cut in the thickness direction cut portion of the range of 4 cm 2.
  • the portions cut out from the region T of the topsheet 2 are a central portion in the region T of the topsheet 2, a portion near the back region B in the region T, and a portion near the ventral region A in the region T.
  • each apparent thickness of each cut surface is measured using a Keyence Corporation VHX-1000 digital microscope with a magnification of 20 to 100 and no load.
  • each apparent density is measured by dividing the basis weight of each cut-out portion by each apparent thickness measured.
  • the portion is a portion 9h having the highest apparent density in the central portion 5m of the crotch region C.
  • those average values Is the apparent density of the portion 9h having the highest apparent density.
  • the apparent density of the bulky region 9L is cut in the thickness direction and a portion in the range of 4 cm 2 is cut out from the bulky region 9L, and the apparent density is measured in the same manner as the portion 9h having a high apparent density.
  • the top sheet 2 of the diaper 1 is provided with a pair of bulky regions 9L, 9L, and the region excluding the pair of bulky regions 9L, 9L is a portion 9h having a high apparent density, In the portion 9h having a high apparent density, the density is uniform.
  • the apparent density of the high apparent density portion 9h is preferably 0.02 g / cm 3 or more, more preferably 0.03 g / cm 3 or more, and preferably 0.1 g / cm 3 or less, more preferably 0.07 g. / Cm 3 or less, more specifically, preferably 0.02 g / cm 3 or more and 0.1 g / cm 3 or less, more preferably 0.03 g / cm 3 or more and 0.07 g / cm 3 or less.
  • the apparent density of the bulky region 9L is preferably 0.008 g / cm 3 or more, more preferably 0.02 g / cm 3 or more, and preferably 0.05 g / cm 3 or less, more preferably 0.04 g / cm 3 or less , more particularly preferably 0.008 g / cm 3 or more 0.05 g / cm 3, more preferably not more than 0.02 g / cm 3 or more 0.04 g / cm 3.
  • the apparent density of the bulky region 9L is preferably lower than the apparent density of the high apparent density portion 9h and not more than 0.8 times the apparent density of the high apparent density portion 9h. More preferably, it is 0.5 times or less.
  • the bulky region 9L is arranged at a position corresponding to the space 41s or the low basis weight portion of the absorbent core 41 constituting the absorber 4.
  • a bulky region 9 ⁇ / b> L having a shape similar to the contour is within the contours of the spaces 41 s and 41 s on both sides of the absorbent core 41. Is arranged.
  • a pair of bulky regions 9 ⁇ / b> L and 9 ⁇ / b> L are arranged corresponding to the pair of space portions 41 s and 41 s.
  • the space portion 41s of the absorbent core 41 is formed in an arc shape convex inward from the side edge along the longitudinal direction (Y direction) of the absorbent core 41 toward the center line CL.
  • the bulky region 9L of the topsheet 2 is also formed in an arc shape convex inward from the side edge along the longitudinal direction (Y direction) of the topsheet 2 toward the center line CL. .
  • the one side 90 arranged on the innermost side among the sides constituting the outline of the bulky region 9 ⁇ / b> L in a plan view as shown in FIG. 1 is formed in an inwardly convex arc shape.
  • the sides 90, 90 constituting the pair of bulky regions 9L, 9L are opposed to each other. That is, the shape of the pair of bulky regions 9L, 9L of the diaper 1 is formed symmetrically with respect to the center line CL.
  • the top sheet 2 of the diaper 1 has a bulky structure having a concavo-convex structure including a large number of convex portions 21 protruding on the skin facing surface side and concave concave portions 22 adjacent to the convex portions 21.
  • the surface sheet 2 has a structure in which the skin facing surface side is uneven, and the non-skin facing surface side is flat.
  • the top sheet 2 of the diaper 1 has a first layer 23 and a second layer 24 that are sheet-like materials.
  • the first layer 23 constitutes the skin facing surface of the topsheet 2
  • the second layer 24 constitutes the non-skin facing surface of the topsheet 2.
  • the first layer 23 is formed with a large number of convex portions 21 that protrude to the skin facing surface side and have a hollow inside, and concave portions 22 are formed between the convex portions 21. Further, the second layer 24 is planar. In the recess 22, the first layer 23 and the second layer 24 are joined via a joint (not shown).
  • the recess 22 includes a joint (not shown) and a non-joint that surrounds the entire circumference of the joint (not shown).
  • the first layer 23 and the second layer 24 are made of the same or different sheet-like materials.
  • This sheet-like material is substantially non-stretchable.
  • any material that is used in conventionally known diapers and is substantially non-stretchable can be used without particular limitation.
  • various nonwoven fabrics such as a nonwoven fabric, a spunbond nonwoven fabric, a meltblown nonwoven fabric, a spunlace nonwoven fabric, and a needle punched nonwoven fabric manufactured by the card method can be used.
  • transmission by the opening means can also be used.
  • the fineness of the constituent fibers is 1 dtex or more, preferably 1.5 dtex or more, and 20 dtex or less, preferably 5.6 dtex or less, more specifically 1 dtex or more and 20 dtex or less. It is preferable from 1.5 dtex or more and 5.6 dtex or less from points, such as ensuring the intensity
  • the convex portion 21 is surrounded by a concave portion 22 having four joint portions (not shown) as shown in FIG. 4, and its bottom surface is rectangular in plan view.
  • the convex portion 21 is a flat rectangular parallelepiped or truncated quadrangular pyramid with rounded ridgelines as a whole.
  • the recess 22 is also rectangular in plan view.
  • the convex portion 21 is surrounded by four joint portions (not shown) (concave portions 22), but there are more joint portions (not shown) (concave portions 22) than four points.
  • the convex portion (not shown) is surrounded by a concave portion having six joint portions (not shown).
  • the convex part is a flat rectangular parallelepiped or truncated cone with rounded ridgelines as a whole.
  • the convex part 21 and the recessed part 22 have comprised the row
  • the convex portion 21 is located at a position adjacent to the one convex portion 21 in the left and right rows adjacent to the row in the width direction (X direction). Is not located. That is, in two rows adjacent in the width direction (X direction), the joint portions (not shown) (concave portions 22) are arranged so as to be shifted by a half pitch in the longitudinal direction (Y direction).
  • the one joint portion (not shown) (concave portion 22) is surrounded by the convex portion 21 at the front and rear and right and left. This is a closed depression formed. That is, when the top sheet 2 is viewed in plan from the first layer 23 side, joints (not shown) (concave portions 22) are arranged in a staggered pattern, and the convex portions 21 are also arranged in a staggered pattern. Yes.
  • the basis weight of the bulky region 9L and the basis weight of the portion 9h having the highest apparent density in the central portion 5m of the crotch region C are the same, and the first layer 23 and the first layer 23
  • the overall basis weight of the topsheet 2 including the two layers 24 is uniform.
  • Total basis weight of the topsheet 2 is preferably 15 g / m 2 or more, more preferably 20 g / m 2 or more, and preferably 150 g / m 2 or less, more preferably 60 g / m 2 or less, more specifically Is preferably 15 g / m 2 or more and 150 g / m 2 or less, more preferably 20 g / m 2 or more and 60 g / m 2 or less.
  • the height of the convex portion 21 located in the bulky region 9L is the apparent thickness of the portion 9h having the highest apparent density, specifically the diaper 1 In the surface sheet 2, it is higher than the height of the convex part 21 located in the area
  • the apparent thickness is measured by the measurement method used in the above-described apparent density measurement method.
  • the apparent thickness of the bulky region 9L is preferably 0.5 mm or more, more preferably 1 mm or more, and preferably 5 mm or less, more preferably 4 mm or less, more specifically 0.5 mm or more and 5 mm or less. More preferably, it is 1 mm or more and 4 mm or less.
  • the apparent thickness of the portion 9h having a high apparent density is preferably 0.3 mm or more, more preferably 0.5 mm or more, and preferably 3 mm or less, more preferably 2 mm or less, more specifically 0.3 mm or more and 3 mm. Or less, more preferably 0.5 mm or more and 2 mm or less.
  • the apparent thickness of the bulky region 9L is higher than the apparent thickness of the portion 9h having a high apparent density, and from the viewpoint of further improving the prevention of side leakage, It is preferably higher than the total thickness of the apparent thickness and the thickness of the absorbent body 4, preferably 1.2 times or more of the apparent thickness of the portion 9 h having a high apparent density, and 1.6 times or more. Is more preferable.
  • the maximum width W1 of the bulky region 9L is wider than the width W2 of the convex portion 21 of the nonwoven fabric of the concavo-convex structure constituting the surface sheet 2 in the bulky region 9L. Is formed.
  • the width W ⁇ b> 2 of the convex portion 21 indicates a dimension along the X direction at the bottom of the convex portion 21.
  • the maximum width W1 of the bulky region 9L is preferably 2 mm or more, more preferably 5 mm or more, and preferably 50 mm or less, more preferably 20 mm or less, more specifically 2 mm or more and 50 mm or less, preferably 5 mm or more. More preferably, it is 20 mm or less.
  • the width W2 of the convex portion 21 located in the bulky region 9L is preferably 1 mm or more, more preferably 2 mm or more, and preferably 30 mm or less, more preferably 5 mm or less, more specifically 1 mm or more and 30 mm or less. Is preferably 2 mm or more and 5 mm or less.
  • region 9L is the same as the width W2 of the convex part 21 located in this bulky area
  • the maximum width W1 of the bulky region 9L is formed wider than the width W2 of the convex portion 21 of the concavo-convex structure of the topsheet 2 in the bulky region 9L.
  • the width W2 of the convex portion 21 of the nonwoven fabric is preferably 2 times or more, and more preferably 5 times or more.
  • the length L1 of the convex part 21 located in the bulky region 9L in the Y direction is the same as the length in the Y direction of the convex part 21 located in the region excluding the bulky region 9L.
  • the length L1 of the convex portion 21 indicates a dimension along the Y direction at the bottom of the convex portion 21.
  • the length L1 of the convex portion 21 is preferably 1 mm or more, more preferably 2 mm or more, and preferably 30 mm or less, more preferably 5 mm or less, and more specifically 1 mm or more and 30 mm or less, preferably 2 mm or more. More preferably, it is 5 mm or less.
  • the diaper 1 of the present embodiment is not particularly limited in its manufacturing method, and can be manufactured by any method.
  • the preferable example of the manufacturing method of the diaper 1 of this embodiment is demonstrated, referring FIG.
  • the press roll 100 includes a first roll 102 having a pair of recessed concave portions 101 forming a pair of bulky regions 9L on the peripheral surface, and a second roll 103 having a flat peripheral surface.
  • the pair of concave portions 101 of the first roll 102 are formed at positions corresponding to the pair of space portions 41 s, 41 s or the low basis weight portion of the absorbent core 41 constituting the absorber 4, and the space portion 41 s or It is formed in a shape similar to the outline of the low basis weight part.
  • the recessed part 101 has the depth of the dent deeper than the height of the convex part 21 of the surface sheet 2.
  • the surface sheet 2 of the diaper for example, the surface sheet described in Japanese Patent Application Laid-Open No. 2004-174234 related to the previous application of the present applicant is used.
  • the absorptive core 41 of the diaper the absorptive core which formed a pair of space part 41s, 41s or the low basic weight part by vacuuming in accordance with a conventional method is used.
  • the absorbent core 4 of the diaper 1 is formed by covering the absorbent core 41 having the pair of space portions 41 s, 41 s or the low basis weight portion thus formed with one core wrap sheet 42.
  • the belt-like top sheet 2 and the belt-like back sheet 3 are fixed in accordance with a conventional method so as to sandwich the plurality of absorbers 4, 4.
  • the leg elastic member 63 is fixed in accordance with a conventional method in a state where the leg elastic member 63 is extended in the transport direction along both sides of the belt-shaped topsheet 2 in the transport direction.
  • a belt-shaped three-dimensional gather forming sheet 62 is provided along each side of the belt-shaped surface sheet 2 in the conveying direction. It fixes according to a conventional method, and fixes according to a conventional method in the state which extended the elastic member 61 for solid gathering to the conveyance direction to the width direction inner side of each solid gather forming sheet 62.
  • the continuous body 104 of the disposable diaper 1 formed as described above is opposed to the first roll 102 of the press roll 100 on the upper surface side (the surface side on which the plurality of convex portions 21 are arranged) of the belt-shaped topsheet 2. In this way, the sheet is conveyed between the first roll 102 and the second roll 103. Then, by pressing the conveyed continuous body 104 of the disposable diaper 1 at a portion excluding the pair of concave portions 101 of the first roll 102, the height of the convex portion 21 is lowered and the pair of concave portions 101. The height of the convex portion 21 located in the region corresponding to is maintained as it is.
  • the convex portion located in the region excluding the pair of concave portions 101 thus formed becomes the convex portion 21 located in a region other than the pair of bulky regions 9L and 9L (part 9h having a high apparent density).
  • regions 9L and 9L intermittently in a conveyance direction is obtained through the above processes, The continuous body of this disposable diaper 1
  • the disposable diaper 1 is continuously obtained by cutting 105 with a known cutting means.
  • the manufacturing method of the disposable diaper 1 provided with the above-described pair of bulky regions 9L and 9L includes the first roll 102 and the second roll 103 of the press roll 100 after the continuous body 104 of the disposable diaper 1 is manufactured first.
  • the belt-like topsheet 2 is pressed using the first roll 102 and the second roll 103 of the press roll 100, and the pair of bulky regions 9L and 9L are intermittently moved in the transport direction.
  • the disposable diaper 1 formed by forming the continuous body 105 of the disposable diaper 1 as described above so as to be disposed at a position corresponding to the pair of space portions 41s, 41s or the low basis weight portion of the core 41.
  • the disposable diaper 1 may be continuously manufactured by cutting the continuum 105 with a known cutting means.
  • the formation material of the disposable diaper 1 of this embodiment is demonstrated.
  • the back sheet 3 and the three-dimensional gather forming sheet 62 can be used without particular limitation as long as they are normally used for absorbent articles such as disposable diapers.
  • a resin film or a laminate of a resin film and a nonwoven fabric can be used as the back sheet 3.
  • As the three-dimensional gather forming sheet 62 a stretchable film, a nonwoven fabric, a woven fabric, or a laminated sheet thereof can be used.
  • the fastening tape 7 can be used without particular limitation as long as it is usually used for absorbent articles such as disposable diapers.
  • the absorptive core 41 that constitutes the absorbent body 4 a structure in which absorbent polymer particles are held in an aggregate of fibers such as pulp fibers can be used.
  • a hydrophilic sheet for example, a core-wrap sheet made of a water-permeable thin paper (tissue paper) or a water-permeable nonwoven fabric can be used.
  • Examples of the elastic member 61, the leg elastic member 63, and the waist elastic member for forming a three-dimensional gather include natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, and polyethylene-such as ethyl acrylate-ethylene.
  • a thread-like stretchable material made of an ⁇ -olefin copolymer or the like can be used.
  • any adhesive that can be used for absorbent articles such as disposable diapers can be used without particular limitation.
  • a hot melt adhesive can be used.
  • hot melt adhesives include blocks such as styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), and styrene-ethylene-butylene-styrene copolymer (SEBS).
  • SIS styrene-isoprene-styrene block copolymer
  • SBS styrene-butadiene-styrene block copolymer
  • SEBS styrene-ethylene-butylene-styrene copolymer
  • the diaper 1 Since the diaper 1 is formed from a bulky nonwoven fabric, the diaper 1 has a good cushioning property when worn, has little wet back after absorption of body fluids, and has a good feeling of use. Further, as shown in FIG. 1, the diaper 1 has a pair of bulky regions 9L and 9L arranged in a portion excluding the back side region B of the topsheet 2, so that, for example, loose stool excreted in the back side region B However, it is easy to spread in the width direction (X direction) in the back side region B, and is easily diffused sufficiently in the back side region B.
  • the amount of loose stool that spreads to the crotch region C through the central region 5m can be suppressed, and the soft stool that spreads to the crotch region C is suppressed by the pair of bulky regions 9L and 9L, further improving the side leakage prevention property of the soft stool. You can do it.
  • the absorptive core 41 which comprises the absorber 4 has a pair of space parts 41s and 41s as shown in FIG. 3, and as shown in FIG. , 41s, a pair of bulky regions 9L, 9L are arranged. Therefore, for example, soft stools that are dammed in the bulky regions 9L and 9L are easily absorbed into the absorbent core 41 via the pair of space portions 41s and 41s, and the side leakage prevention property of the soft stools can be further improved. .
  • the diaper 1 has a bulky region 9 ⁇ / b> L not only in the dorsal region B but also in the ventral region A and disposed in the crotch region C. Therefore, even if the diaper 1 in a state of being pressurized by packaging is taken out and used, the bulk of the bulky region 9L can be maintained, and the side leakage preventing property of soft stool can be further improved.
  • the bulk of the bulky region 9L can be maintained as described above, and the apparent density in the crotch region C is lowered by folding and packaging.
  • the state of the surface sheet 2 is maintained.
  • the bulk of the bulky region 9L can be maintained, and folds generated in an absorbent article such as a normal diaper are reduced. Liquid bleeding to the side of the property article (induction of leakage), uncomfortable feeling at the time of wearing, and the likelihood of rubbing are reduced.
  • the treatment of the topsheet 2 in the crotch region C is performed by changing the fiber fusion state of the topsheet 2 from the viewpoint of stabilizing the low density state.
  • it is preferable to increase it from 9L (increase the amount of fusion and the fusion point) it usually tends to lower the texture. Therefore, in general, it is conceivable to maintain the texture (softness) by treatment of the concave portion (absorber side) of the concavo-convex structure or treatment at a relatively low temperature, but the stability is difficult and the effect is low.
  • 9L increase the amount of fusion and the fusion point
  • the effect may be reduced by a bulky second sheet and an absorbent body that are difficult to maintain a low density state.
  • the diaper (absorbent article) of the present invention when the crotch region C is folded in two or three, the crotch region C is folded in a shape in which the absorbers face each other between the crotch regions or different regions (back side or belly side). It is. Furthermore, since there are few folds by folding, it is hard to form a clearance gap, a fold shape is stabilized, the surface sheet 2 is stably pinched
  • the top sheet 2 is stably sandwiched, and a low density state is easily maintained, and a stable effect is obtained for a long time.
  • an absorbent article such as a diaper that exhibits a stable effect
  • a normal configuration can be used due to the stability effect of the folded shape, but the thickness of the absorber gradually decreases from the central region to the side periphery. If the shape of the absorber in the central region is partially thickened like the shape, a region with enhanced adhesion is formed, and the effect can be enhanced.
  • the adhesive when the adhesive is partially disposed between the top sheet 2 and the absorber 4 or the absorber surface side of the top sheet has a partial convex structure, the fixability may be partially enhanced. And stability is improved.
  • the folding surfaces are stabilized by the absorption surfaces facing each other, the compression to the topsheet 2 at the portion where the absorbent body 4 overlaps is made uniform, and the topsheet 2 in the crotch region C
  • the topsheet 2 in the crotch region C In addition to obtaining the above-described function by maintaining a higher density than the portion in the bulky region 9L, it provides a new effect that smoothness and a sense of incongruity can be stably obtained.
  • the absorbent article such as a folded diaper is in a state of being stacked by a package, it is easy to obtain an effect over a long period of time, and stability is improved as compared with a single case. This effect is effective even when the package is opened, as long as a plurality of the layers are stacked.
  • the surface sheet 2 consists of a bulky nonwoven fabric which has a concavo-convex structure provided with many convex parts 21 and recessed parts 22, the diaper 1 is easy to form the bulky area
  • the surface sheet 2 of the diaper 1 has an apparent thickness of the bulky region 9L larger than an apparent thickness of the portion 9h having the highest apparent density in the central portion 5m of the crotch region C. Since it is high, the soft stool spreading in the width direction (X direction) in the crotch region C can be easily dammed, and the side leakage prevention property of the soft stool can be further improved.
  • the diaper 1 has a pair of bulky regions 9L, 9L formed symmetrically with respect to the center line CL, and the sides 90, 90 are opposed to each other and are formed in an inwardly convex arc shape.
  • the diffusion width of soft stools becomes narrower toward the center of the crotch region C. Therefore, the loose stool excreted in the dorsal region B easily spreads toward the center of the crotch region C through the central region 5m, and the side leakage prevention property of the soft stool can be further improved.
  • the diaper 1 is formed so that the maximum width W1 of the bulky region 9L is wider than the width W2 of the convex portion 21 of the topsheet 2 in the bulky region 9L. Therefore, even if the diaper 1 in a state pressurized by packaging is taken out and used, the shape of the convex portion 21 in the bulky region 9L can be maintained, and the side leakage prevention property of soft stool can be further improved. it can.
  • the disposable diaper which is an embodiment of the absorbent article of the present invention is not limited to the disposable diaper 1 of the above-described embodiment, and can be appropriately changed.
  • the absorbent core 41 of the absorbent body 4 is in the crotch region C in the longitudinal direction (Y direction) of the absorbent core 41. It has a space 41 s formed by lacking pulp in a circular arc convex inward from both side edges along the center line CL, or a low basis weight part formed by lowering the basis weight of the pulp.
  • the space portion 41 s or the low basis weight portion is the length of the absorbent core 41 in the crotch region C as shown in FIG. It is located inward from both side edges along the direction (Y direction), and the shape thereof may be formed in an arc shape convex inward toward the center line CL.
  • the space part 41s or the low basis weight part may have a first space part 41s1 and a second space part 41s2.
  • the first space portion 41s1 is formed in an arc shape convex inward from both side edges along the longitudinal direction (Y direction) of the absorbent core 41 toward the center line CL.
  • the second space portion 41s2 is positioned inward from the arcuate top of the first space portion 41s1, and is formed in a pair of rectangular shapes.
  • the space part 41s or the low basis weight part may have a first space part 41s1 and a third space part 41s3.
  • the first space portion 41s1 is positioned inward from both side edges along the longitudinal direction (Y direction) of the absorbent core 41, and the shape thereof is inward toward the center line CL.
  • the third space 41s3 is located in the middle of the arcuate tops of the adjacent first spaces 41s1 and formed in a single rectangular shape.
  • the end of the back side region B side of the single rectangular third space 41s3 is the back side of each of the pair of arc-shaped first spaces 41s1, 41s1. It is arranged closer to the ventral region A than the end on the region B side.
  • the space portion 41 s or the low basis weight portion is located on both sides along the longitudinal direction (Y direction) of the absorbent core 41 from the portion near the crotch region C of the back region B to the crotch region. It may be formed in a straight line until it reaches the entire region of the ventral region A through C.
  • region 9L of the surface sheet 2 is the space part 41s which the absorptive core 41 which comprises the absorber 4 has, or low-tsubo Although it is arranged at a position corresponding to the quantity part, it may not be arranged correspondingly.
  • the shape of the space part 41s or the low basic weight part which the absorptive core 41 which comprises the absorber 4 has is a shape as shown in FIG.
  • the bulky region 9L of the sheet 2 is arranged at a position corresponding to the space portion 41s or the low basis weight portion as shown in FIGS. 1 and 4.
  • the shape of the space portion 41s or the low basis weight portion is
  • the bulky region 9L of the topsheet 2 is similar to the shape of the pair of space portions 41s, 41s or the low basis weight portion shown in FIG. 6, as shown in FIG.
  • the crotch region C it is located inward from both side edges along the longitudinal direction (Y direction) of the absorbent core 41, and the shape thereof is formed in an arc shape convex inward toward the center line CL. It may be.
  • the topsheet 2 on the side portions 5s and 5s the bulky region 9L includes a pair of first bulky regions 9La, 9La, and a pair of central bulky regions 9Lb, 9Lb between the pair of first bulky regions 9La, 9La. You may have.
  • the bulky region 9L of the topsheet 2 is similar to the shape of the two pairs of space portions 41s (first space portion 41s1 and second space portion 41s2) shown in FIG.
  • a pair of first bulky regions 9La and 9La are formed in an arc shape convex inward from both side edges along the longitudinal direction (Y direction) of the topsheet 2 toward the center line CL.
  • a pair of central bulky regions 9Lb and 9Lb are located inward from the tops of the arc-shaped bulky regions 9La and are rectangular in the Y direction. Is formed.
  • the pair of central bulky regions 9Lb and 9Lb have end portions on the back side region B side at the back side region B side of the pair of arc-shaped bulky regions 9La and 9La, respectively.
  • the bulk region 9L of the topsheet 2 has one pair of space portions 41s and 41s (first space) of the two pairs of space portions 41s (first space portion 41s1 and second space portion 41s2) shown in FIG. It may be formed similar to the shape of the portion 41s1 or the second space portion 41s2).
  • the shape is similar to the shape of the inner pair of space portions 41s and 41s (second space portion 41s2).
  • only a pair of central bulk regions 9Lb and 9Lb may be formed in a rectangular shape that is long in the Y direction.
  • the bulk region 9L of the topsheet 2 is as shown in FIG. A pair of first bulky regions 9La and 9La and a second central bulky region 9Lc may be provided between the pair of first bulky regions 9La and 9La.
  • the bulky region 9L of the topsheet 2 is similar to the shape of the three space portions 41s (first space portion 41s1 and third space portion 41s3) shown in FIG.
  • the first bulky regions 9La and 9La are located inward from both side edges along the longitudinal direction (Y direction) of the topsheet 2, and the shape thereof is an arc shape convex inward toward the center line CL.
  • a second central bulk region 9Lc is located between the pair of bulky regions 9La and 9La and is located inward from the top of the arc-shaped bulky region 9La and is longer in the Y direction. It may be formed in a rectangular shape.
  • the one second central bulk region 9Lc has an end on the back side region B side at the back side region B side of each of the pair of arc-shaped bulk regions 9La and 9La. It is arranged closer to the ventral region A than the end portion.
  • the loose stool excreted in the dorsal region B is in the crotch region C. Can be further prevented from diffusing to the ventral region A, and leakage on the ventral side can be further prevented.
  • the bulky region 9L of the topsheet 2 is a space shown in FIG. Similar to the shape of the portion 41 s or the low basis weight portion, on both sides along the longitudinal direction (Y direction) of the topsheet 2, from the portion near the crotch region C of the dorsal region B to the ventral region C through the crotch region C You may form in the shape of a straight line until it covers the whole area of A.
  • the surface sheet 2 As the surface sheet 2, it is a nonwoven fabric which has the 1st layer 23 and the 2nd layer 24, Comprising: The 1st layer 23 side is skin.
  • a bulky nonwoven fabric having a concavo-convex structure in which a large number of convex portions 21 are formed which are raised on the opposite surface side and are hollow inside and a concave portion 22 is formed between the convex portions 21 is used.
  • a bulky nonwoven fabric having a concavo-convex structure which is a nonwoven fabric composed of two layers and has a large number of convex portions with solid inside and concave portions between the convex portions may be used.
  • a nonwoven fabric for example, a surface sheet described in JP-A No. 2002-187228 related to the previous application of the present applicant can be mentioned.
  • the woven fabric is composed of a single layer, and is a bulky nonwoven fabric having a concavo-convex structure having a large number of convex portions protruding on the skin facing surface side and concave portions between the convex portions. May be used.
  • a surface sheet described in JP 2012-136790 A related to the earlier application of the present applicant can be mentioned.
  • the disposable diaper 1 of the above-mentioned embodiment as shown in FIG.2 and FIG.4, as the surface sheet 2, many convex parts 21 which protruded only on the skin opposing surface side, and concave parts between the convex parts 21 22 is used in place of the non-woven fabric having a concavo-convex structure, and in place of the concavo-convex structure non-woven fabric, a large number of convex portions protruding not only on the skin facing surface side but also on the non-skin facing surface side, and the convex portions You may use the bulky nonwoven fabric of the uneven structure which has a recessed part in between.
  • Examples of such a concavo-convex structure of the nonwoven fabric include a ridge groove structure in which the convex portions 21 are ridges and the concave portions 22 are grooves.
  • the convex part 21 of the collar is solid. If a nonwoven fabric having such a concave-convex structure made up of such ridges is used, loose stool excreted in the dorsal region B can easily diffuse in the longitudinal direction (Y direction), and further prevent lateral leakage from the crotch region C. it can.
  • An example of such a non-woven fabric having a concavo-convex structure made of ridges is a surface sheet described in Japanese Patent Application Laid-Open No. 2009-153937 according to the earlier application of the present applicant.
  • the disposable diaper 1 of the above-mentioned embodiment is an unfolded disposable diaper as shown in FIG. 1, it may be a pants-type disposable diaper or a sanitary napkin.
  • a longitudinally long sheet comprising a liquid-permeable surface sheet disposed on the skin facing surface side, a liquid-impermeable surface sheet disposed on the non-skin facing surface side, and an absorber disposed between the two sheets.
  • An absorbent article having an absorbent body The absorbent main body is divided into a ventral region located on the wearer's ventral side when worn, a dorsal region located on the dorsal side, and a crotch region disposed between the ventral region and the dorsal region.
  • the surface sheet is made of a bulky nonwoven fabric, In the topsheet excluding the back region, on both sides along the longitudinal direction of the absorbent main body, a bulky region having a lower apparent density than a portion having the highest apparent density in the central portion of the crotch region, At least a pair of absorbent articles.
  • the absorbent body has an absorptive core, and the absorptive core is a low basis weight part in which the basis weight of the pulp constituting the absorbent core is relatively low, or a space without pulp constituting the absorptive core.
  • Part The absorbent article according to ⁇ 1>, wherein the bulky region is disposed at a position corresponding to the low basis weight portion or the space portion.
  • the bulky region is not in the ventral region, but is disposed in the crotch region, according to ⁇ 1> or ⁇ 2>.
  • the surface sheet is any one of ⁇ 1> to ⁇ 3> comprising a bulky nonwoven fabric having a concavo-convex structure including at least a large number of convex portions protruding on the skin facing surface side and concave concave portions adjacent to the convex portions.
  • the absorbent article as described.
  • ⁇ 5> The absorbent article according to ⁇ 4>, wherein the concavo-convex structure is a ridge groove structure in which the convex portion is a ridge and the concave portion is a groove.
  • ⁇ 6> The absorbent article according to any one of ⁇ 1> to ⁇ 5>, wherein the bulky region has an apparent thickness that is higher than an apparent thickness of a portion having the highest apparent density in a central portion of the crotch region.
  • ⁇ 7> In plan view, one of the sides that constitutes the outline of the bulky region, the innermost side is formed in an inwardly convex arc shape, and the sides that constitute the pair of bulky regions are The absorbent article according to any one of ⁇ 1> to ⁇ 6>, which are opposed to each other.
  • ⁇ 8> The absorption according to any one of ⁇ 4> to ⁇ 7>, wherein the maximum width of the bulky region is larger than the width of the convex portion of the nonwoven fabric having a concavo-convex structure constituting the surface sheet in the bulky region in plan view. Sex goods. ⁇ 9> Between the pair of bulky regions, at least one central bulky region is further arranged, and an end of the central bulky region on the back side region side is an end on the back side region side of each of the pair of bulky regions.
  • the absorbent article according to ⁇ 1> to ⁇ 9> is a disposable diaper.
  • the disposable diaper is a deployable disposable diaper, and a pair of fastening tapes are provided on both left and right edges of the dorsal region, and a landing tape for fastening the fastening tape is provided on the outer surface of the ventral region.
  • ⁇ 12> ⁇ 10> ⁇ 11> The disposable diaper according to any one of ⁇ 10> and ⁇ 11>, wherein the liquid-impervious rear sheet is provided with an outer packaging made of a liquid-impermeable film and a non-woven fabric disposed outward.
  • ⁇ 13> The disposable diaper according to ⁇ 12>, wherein the outer package has a constricted position, and the constricted position is in a crotch region.
  • the absorbent body is composed of an absorbent core in which water-absorbing polymer particles are held in an aggregate of pulp fibers, and a core wrap sheet covering the absorbent core.
  • Disposable diapers ⁇ 15> In each side part along the longitudinal direction of the disposable diaper, a three-dimensional gather forming sheet having an elastic member fixed in an extended state is arranged and fixed on a side part of the top sheet, thereby a pair of three-dimensional solids.
  • Leg elastic members for forming leg gathers are extended in both sides along the longitudinal direction of the disposable diaper, and the leg gathers are formed by contraction of the leg elastic members ⁇ 10> to ⁇ 15>.
  • the basis weight of the low basis weight part of the absorbent core is lower than other parts, and the ratio of the low basis weight part / high basis weight part is 70% or less, preferably 50% or less ⁇ 10> to ⁇ 16>
  • the disposable diaper according to any one of ⁇ 10> to ⁇ 18>, wherein the absorbent body is formed by covering an absorbent core having a space portion formed in an inwardly convex arc shape with a core wrap sheet.
  • the top sheet is provided with a pair of bulky regions, and the regions other than the pair of bulky regions are all portions having a high apparent density.
  • ⁇ 20> The disposable diaper according to any one of ⁇ 10> to ⁇ 18>, wherein a total area of the pair of bulky regions is 5 cm 2 or more, preferably 30 cm 2 or more, and 150 cm 2 or less, preferably 60 cm 2 or less.
  • the apparent density of the high apparent density portion is 0.02 g / cm 3 or more, preferably 0.03 g / cm 3 or more, and 0.1 g / cm 3 or less, preferably 0.07 g / cm 3 or less ⁇
  • ⁇ 22> Apparent density of the bulky region, 0.008 g / cm 3 or higher, preferably 0.02 g / cm 3 or more and 0.05 g / cm 3 or less, preferably is 0.04 g / cm 3 or less ⁇ 10> - ⁇ 20>
  • ⁇ 23> The apparent density of the bulky region is lower than the apparent density of the high apparent density portion, 0.8 times or less, preferably 0.5 times or less the apparent density of the high apparent density portion ⁇ 10
  • the space portion of the absorbent core is formed in an arc shape protruding inward from the side edge along the longitudinal direction of the absorbent core toward the center line, and the shape of the space portion
  • the bulky region of the topsheet is also formed in an arc shape convex inward from the side edge along the longitudinal direction of the topsheet toward the center line, and the contour of the bulky region in plan view
  • the one side arranged on the innermost side is formed in an inwardly convex arc shape, and the one side constituting a pair of bulky regions is opposed to each other, and the shape of the bulky region is:
  • the disposable diaper according to any one of ⁇ 10> to ⁇ 23>, which is formed symmetrically with respect to the center line.
  • the surface sheet of the disposable diaper is made of a bulky nonwoven fabric having a concavo-convex structure including a large number of convex portions raised on the skin facing surface side and concave concave portions adjacent to the convex portions, and the top sheet is a skin facing surface.
  • the side has a undulating structure, the non-skin facing surface side is flat, and the top sheet has a first layer and a second layer of a sheet-like material, and the first layer is a skin facing surface of the top sheet.
  • the second layer 24 constitutes the non-skin facing surface of the topsheet, and the first layer has a number of bulges that are raised on the skin facing surface side and are hollow inside.
  • the first layer and the second layer are made of the same or different sheet-like material, and the sheet-like material is substantially non-stretchable.
  • the nonwoven fabric, spunbond nonwoven fabric, meltblown nonwoven fabric, and spunlace manufactured by the card method.
  • the disposable diaper according to ⁇ 25> which is either a nonwoven fabric or a needle punched nonwoven fabric, and the fineness of the constituent fibers is 1 dtex or more, preferably 1.5 dtex or more, and 20 dtex or less, preferably 5.6 dtex or less.
  • the convex portion is surrounded by a concave portion having a joint portion of 4 or 6 points, the bottom surface thereof is flat, and the convex portion is a flat rectangular parallelepiped having a rounded ridgeline as a whole or
  • the basis weight of the bulky region and the basis weight of the portion with the highest apparent density in the central portion of the crotch region are the same, and the entire surface sheet including the first layer and the second layer
  • the basis weight of the top sheet is 15 g / m 2 or more, preferably 20 g / m 2 or more, and 150 g / m 2 or less, preferably 60 g / m 2 or less.
  • the apparent thickness of the bulk region of the surface sheet is 0.5 mm or more, preferably 1 mm or more, and 5 mm or less, preferably 4 mm or less, and the apparent thickness of the high apparent density portion is 0.3 mm or more, preferably
  • the apparent thickness of the bulk region is higher than the apparent thickness of the high apparent density portion, higher than the total thickness of the apparent thickness of the high apparent density portion and the absorber thickness,
  • the maximum width of the bulky region is formed wider than the width of the convex portion of the nonwoven fabric of the uneven structure constituting the surface sheet in the bulky region, and the maximum width of the bulky region is 2 mm or more , Preferably 5 mm or more, and 50 mm or less, preferably 20 mm or less, and the width of the convex portion located in the bulky region is 1 mm or more, preferably 2 mm or more, and 30 mm or less, preferably 5 mm or less ⁇ 10
  • the disposable diaper according to any one of> to ⁇ 30>.
  • the maximum width of the bulk region is formed wider than the width of the convex portion of the nonwoven fabric of the uneven structure constituting the surface sheet in the bulk region,
  • the disposable diaper according to any one of ⁇ 10> to ⁇ 31>, which is at least twice the width of the convex portion of the nonwoven fabric, preferably at least 5 times.
  • the length in the longitudinal direction of the convex portion located in the bulky region is the same as the length in the longitudinal direction of the convex portion located in the region excluding the bulky region, and the length of the convex portion is The disposable diaper according to any one of ⁇ 10> to ⁇ 32>, which is 1 mm or more, preferably 2 mm or more, and 30 mm or less, preferably 5 mm or less.
  • the absorbent core constituting the absorbent body an aggregate of pulp fibers is used in which absorbent polymer particles are held, and the covering material constituting the absorbent body is a hydrophilic sheet, and is permeable to water.
  • the elastic member and leg elastic member for forming three-dimensional gathers are made of natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, polyethylene acrylate-ethylene copolymer of ethyl acrylate-ethylene.
  • a hot melt adhesive can be used as an adhesive used for fixing each member.
  • hot melt adhesive examples include styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer.
  • SIS styrene-isoprene-styrene block copolymer
  • SEBS styrene-ethylene-butylene-styrene copolymer
  • the space part or the low basis weight part of the absorbent core is located inward from both side edges along the longitudinal direction of the absorbent core in the crotch region, and the shape of the absorbent core is a circle that protrudes inward toward the center line.
  • the disposable diaper according to any one of ⁇ 10> to ⁇ 36>, which is formed in an arc shape.
  • the space portion or the low basis weight portion of the absorbent core has a first space portion and a second space portion, and in the crotch region, the first space portion is centered from both side edges along the longitudinal direction of the absorbent core.
  • the disposable diaper according to any one of 10> to ⁇ 37>.
  • the space portion or the low basis weight portion of the absorbent core has a first space portion and a third space portion, and in the crotch region, the first space portion is inward from both side edges along the longitudinal direction of the absorbent core.
  • the shape thereof is formed in an arc shape convex inward toward the center line, and the third space portion is located between the arc-shaped top portions of the adjacent first space portions.
  • the disposable diaper according to any one of ⁇ 10> to ⁇ 36>, which is disposed closer to the ventral region than the end.
  • the space part or the low basis weight part of the absorbent core is straight on both sides along the longitudinal direction of the absorbent core from the part near the crotch area of the dorsal area to the whole area of the ventral area through the crotch area.
  • the shape of the space part or the low basis weight part of the absorbent core, the bulk region of the topsheet is arranged at a position corresponding to the space part or the low basis weight part,
  • the bulky region of the topsheet is similar to the shape of the pair of space portions or the low basis weight portions, and is located inward from both side edges along the longitudinal direction of the absorbent core in the crotch region, and the shape is
  • the disposable diaper according to any one of ⁇ 10> to ⁇ 36>, wherein the disposable diaper is formed in an arc shape convex inward toward the center line.
  • the space part or low basis weight part of the absorbent core has a first space part and a second space part, and the bulky areas of the topsheet on both sides are a pair of first bulky areas and the pair of first bulky parts.
  • a pair of central bulky regions, and the bulky region of the topsheet resembles the shape of the two pairs of space portions, and a pair of first bulky regions on both sides of the crotch region Are formed in an arc shape convex inwardly toward the center line CL from both side edges along the longitudinal direction (Y direction) of the surface sheet, and a pair further between the pair of first bulky regions.
  • the central bulky region is located inward of the top of the arc-shaped bulky region and is formed in a rectangular shape that is long in the longitudinal direction. Further, each of the pair of arc-shaped bulky regions is disposed closer to the ventral region than the end on the dorsal region side ⁇ 10 ⁇ ⁇ 36>
  • the space portion or the low basis weight portion of the absorbent core has a first space portion and a second space portion, and does not have a bulky region of the surface sheet on both sides, and a pair of centers corresponding to the second space portion.
  • the disposable bulk according to any one of ⁇ 10> to ⁇ 36>, having a bulky region, wherein the central bulky region of the topsheet is formed in a rectangular shape long in the longitudinal direction similar to the shape of the second space portion Diapers.
  • the space portion or the low basis weight portion of the absorbent core includes a pair of space portions, and further includes one space portion between the pair of space portions, and in the crotch region, the pair of space portions is the length of the absorber. It is located inward from both side edges along the direction (Y direction), and its shape is formed in an arc shape protruding inward toward the center line, and one more between the pair of space portions.
  • the central space portion is located inward of the top of the arc-shaped space portion and is formed in a rectangular shape that is long in the longitudinal direction, and the end portion on the back side region side of the one central space portion is
  • the absorbent core is arranged closer to the ventral region than the end on the dorsal region side of each of the pair of arc-shaped spaces
  • the bulky region of the topsheet is similar to the shape of the three spaces of the absorbent core, and in the crotch region, the pair of bulky regions are located inward from both side edges along the longitudinal direction of the topsheet,
  • the shape is formed in an arc shape projecting inwardly toward the center line, and one central bulky region is located between the pair of bulky regions than the top of the arcuate bulky region.
  • the central bulky region is located on the back side, and the end portion on the back side region side of the one central bulky region is more than the back side region end portion of each of the pair of arc-shaped bulky regions.
  • the disposable diaper according to any one of ⁇ 10> to ⁇ 36>, which is also arranged near the ventral region.
  • Example 1 Using the apparatus shown in FIG. 5, press the M size of Marys (registered trademark) smooth air-through manufactured by Kao Corporation so that the upper surface side of the top sheet faces the first roll 102 of the press roll 100, A disposable diaper of Example 1 having a pair of bulky regions 9L, 9L was produced.
  • the shape of the pair of bulky regions 9L, 9L was formed in an arc shape convex inward from the side edge along the longitudinal direction (Y direction) of the topsheet toward the center line CL.
  • the total area of the pair of bulky regions 9L, 9L was 30.5 cm 2 .
  • the apparent density of the portion 9h having a high apparent density was 0.051 g / cm 3
  • the apparent density of the bulky region 9L was 0.027 g / cm 3
  • the apparent thickness of the portion 9h having a high apparent density is 0.8 mm
  • the apparent thickness of the bulky region 9L (the convex portion 21 located in the bulky region 9L). The height was 1.5 mm.
  • FIG. 15 the surface sheet with which the product of the Merry's (trademark) smooth air through M size made from Kao Corporation is shown. The surface sheet shown in FIG.
  • the 15 has an upper layer and a lower layer made of a sheet-like material, the upper layer and the lower layer are partially bonded, the upper layer protrudes at a portion other than the bonded portion, and the inside is hollow. It is a bulky sheet having a large number of convex portions.
  • Example 2 The surface sheet is removed from the M size product of Merry's (registered trademark) smooth air-through manufactured by Kao Corporation, and the nonwoven fabric shown below is attached in place, and then pressed using the apparatus shown in FIG. And the disposable diaper of Example 2 which has a pair of bulky area
  • the nonwoven fabric attached instead is the bulky sheet shown in FIG. 16, and is a sheet formed by forming a large number of convex portions on a single sheet-like material.
  • Such a nonwoven fabric supplies a web having a basis weight of 30 g / m 2 made of a core-sheath type composite fiber to a shaping device, and the web on the pedestal is projected along a protrusion on the pedestal arranged in the shaping device. It is manufactured by blowing hot air toward the web, shaping and fusing the fibers.
  • the non-woven fabric attached instead had a thickness of 2.5 mm.
  • the total area of a pair of bulky regions 9L and 9L was 30.5 cm 2 .
  • the apparent density of the portion 9h having a high apparent density was 0.017 g / cm 3
  • the apparent density of the bulky region 9L was 0.012 g / cm 3 .
  • the apparent thickness of the portion 9h having a high apparent density was 1.7 mm
  • the apparent thickness of the bulky region 9L was 2.5 mm.
  • Comparative Example 3 As shown in FIG. 5, the first roll 102 having a pair of recessed concave portions 101 of the press roll 100 on the peripheral surface is replaced with a roll having a flat entire area without the concave portions, and the surface sheet shown in FIG. 15. Disposable of Comparative Example 3 having no bulky area by pressing M area of Merry's (Registered Trademark) Air-Through Air-Through manufactured by Kao Co., Ltd. with the upper surface of the top sheet facing the changed roll. A diaper was made.
  • Comparative Example 5 As shown in FIG. 5, a roll having a first roll 102 provided with a pair of recessed concave portions 101 on the peripheral surface of the press roll 100, and having a convex portion raised over the entire circumference in the center in the width direction of the roll. Instead, the disposable diaper of Comparative Example 4 is pressed so that the upper surface side of the topsheet faces the changed roll, and the pair of bulky regions span the entire longitudinal direction (Y direction) of both side portions. A disposable diaper of Comparative Example 5 was prepared.
  • the OHP film is placed on the top sheet, and a roller having a diameter of 65 mm and a width of 65 mm is used from above the OHP film, and the roller is rolled toward the ventral region.
  • the diffusion distance in the side region direction was measured. The measurement is shown in Table 1 by measuring three samples for each diaper and calculating the average value of the measured values.
  • the disposable diapers of Examples 1 and 2 are more easily diffused in the longitudinal direction in the crotch region than the disposable diapers of Comparative Examples 1 to 6, and the width direction It was found that the diffusion to was suppressed. Therefore, according to the disposable diapers of Examples 1 and 2, it can be expected that the side leakage of soft stool is efficiently prevented.
  • the disposable diaper of Comparative Examples 1 and 4 does not have a bulky region, it was found that in the crotch region, it easily diffuses not only in the longitudinal direction but also in the width direction.
  • the disposable diaper of Comparative Examples 2 and 5 has a pair of bulky regions over the entire area on both sides in the longitudinal direction, diffusion to the crotch region is promoted too much and diffuses in the width direction as well. I understood that.
  • the disposable diapers of Comparative Examples 3 and 6 do not have a bulky region, and the entire region is a portion having a high apparent density, and therefore, in the crotch region, the disposable diaper can easily diffuse not only in the longitudinal direction but also in the width direction. I understood.
  • the cushioning property at the time of wearing is good, the wetback after absorption of body fluid is small, the feeling of use is good, and the side leakage prevention property of body fluid is further improved.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
PCT/JP2014/067167 2013-07-30 2014-06-27 吸収性物品 WO2015015970A1 (ja)

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JPS6227946A (ja) * 1985-07-31 1987-02-05 メ−ルンリユ−ケ・ア−ベ− おむつ、失禁防護帯または月経帯のごとき吸収性物品
JP2004154153A (ja) * 2002-09-09 2004-06-03 Uni Charm Corp 可撓軸を備えた吸収性物品
JP2009148445A (ja) * 2007-12-21 2009-07-09 Kao Corp 吸収性物品
JP2011530342A (ja) * 2008-08-08 2011-12-22 ザ プロクター アンド ギャンブル カンパニー 房付きトップシートを有する吸収性物品
JP2012061167A (ja) * 2010-09-16 2012-03-29 Kao Corp パンツ型吸収性物品
JP2012075566A (ja) * 2010-09-30 2012-04-19 Unicharm Corp パンツ型オムツ
JP2012090818A (ja) * 2010-10-27 2012-05-17 Oji Nepia Co Ltd 吸収性物品
JP2012214938A (ja) * 2011-04-01 2012-11-08 Uni Charm Corp 不織布、上記不織布を含む吸収性物品、及び上記不織布の製造方法

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JP4979862B2 (ja) * 2001-09-27 2012-07-18 大王製紙株式会社 ペーパー層と繊維ウェブ層の複合体シート及びその製造方法、多機能トップシート、吸収体製品及びその製造方法、吸収性複合体シート及びその製造方法

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Publication number Priority date Publication date Assignee Title
JPS6227946A (ja) * 1985-07-31 1987-02-05 メ−ルンリユ−ケ・ア−ベ− おむつ、失禁防護帯または月経帯のごとき吸収性物品
JP2004154153A (ja) * 2002-09-09 2004-06-03 Uni Charm Corp 可撓軸を備えた吸収性物品
JP2009148445A (ja) * 2007-12-21 2009-07-09 Kao Corp 吸収性物品
JP2011530342A (ja) * 2008-08-08 2011-12-22 ザ プロクター アンド ギャンブル カンパニー 房付きトップシートを有する吸収性物品
JP2012061167A (ja) * 2010-09-16 2012-03-29 Kao Corp パンツ型吸収性物品
JP2012075566A (ja) * 2010-09-30 2012-04-19 Unicharm Corp パンツ型オムツ
JP2012090818A (ja) * 2010-10-27 2012-05-17 Oji Nepia Co Ltd 吸収性物品
JP2012214938A (ja) * 2011-04-01 2012-11-08 Uni Charm Corp 不織布、上記不織布を含む吸収性物品、及び上記不織布の製造方法

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JP6419454B2 (ja) 2018-11-07
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CN205672142U (zh) 2016-11-09
RU168782U1 (ru) 2017-02-17
TW201509388A (zh) 2015-03-16

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