WO2013187261A1 - Absorbent article - Google Patents
Absorbent article Download PDFInfo
- Publication number
- WO2013187261A1 WO2013187261A1 PCT/JP2013/065269 JP2013065269W WO2013187261A1 WO 2013187261 A1 WO2013187261 A1 WO 2013187261A1 JP 2013065269 W JP2013065269 W JP 2013065269W WO 2013187261 A1 WO2013187261 A1 WO 2013187261A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- basis weight
- indicator
- absorbent
- back sheet
- low basis
- Prior art date
Links
Images
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
- A61F13/53—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 absorbing medium
- A61F13/531—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 absorbing medium having a homogeneous composition through the thickness of the pad
- A61F13/532—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 absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
- A61F13/533—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 absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad having discontinuous areas of compression
-
- 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
- A61F13/42—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators with wetness indicator or alarm
Definitions
- the present invention relates to an absorbent article such as a disposable diaper.
- Patent Document 1 describes a disposable diaper in which an indicator for notifying a mother that urine has been excreted is interposed between a back sheet and an absorbent body.
- the disposable diaper described in Patent Document 1 is a diaper that easily recognizes discoloration caused by excreted urine or the like from the outside.
- Patent Document 2 describes an absorbent article including an absorbent body in which a groove-like space extending in a planar direction is formed.
- Patent Document 1 As described above, the disposable diaper described in Patent Document 1 is easy to recognize discoloration caused by excreted urine or the like from the outside, but as a consumer need, when the amount of excrement is small However, there was a need to change diapers easily.
- Patent Document 2 in an absorbent article including an absorbent body in which a groove-like space extending in a planar direction is formed, there is no description as to how an indicator is arranged with respect to the absorbent body. It has not been.
- the present invention relates to providing an absorbent article that can satisfy the aforementioned needs.
- the present invention comprises a top sheet disposed on the skin facing surface side, a back sheet disposed on the non-skin facing surface side, and a vertically long absorber disposed between both the sheets, the back sheet and the
- the present invention relates to an absorbent article in which an indicator notifying excretion by a color change is continuously arranged in the vertical direction between the absorbent body.
- the absorbent body has an absorbent core containing an absorbent polymer, and the absorbent core has a relatively high basis weight and is convex on the back sheet side, and is adjacent to the high basis weight part.
- the basis weight is relatively low, and the low basis weight portions that are recessed from the back sheet side to the top sheet side are alternately formed in the vertical direction, and the high basis weight portion and the low basis weight portion are integrally formed.
- An uneven structure in which the high basis weight portion and the low basis weight portion are alternately arranged in the extending direction of the indicator is formed on the side of the back sheet on which the indicator is provided.
- 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. 3 is a cross-sectional view taken along the line II-II after the disposable diaper of FIG. 1 has absorbed a small amount of body fluid.
- FIG. 4 is a schematic view showing an example of an absorbent body manufacturing apparatus used in the unfolded disposable diaper according to the embodiment of the present invention.
- FIG. 5 is a schematic cross-sectional view along the width direction of a part (concave portion) on the outer peripheral surface side of the rotating drum shown in FIG. FIG.
- FIG. 6 is a schematic cross-sectional view showing a state where an absorbent material is deposited in the concave portion of the rotating drum shown in FIG.
- FIG. 7 is a plan view of the absorbent core of the disposable diaper shown in FIG. 1 as viewed from the back sheet side.
- FIG. 8 is the top view which looked at the absorptive core used for the disposable diaper which is another embodiment of this invention from the back surface sheet side.
- FIG. 9 is the top view which looked at the absorptive core used for the disposable diaper which is another embodiment of this invention from the back surface sheet side.
- FIG. 10 is the top view which looked at the absorptive core used for the disposable diaper which is another embodiment of this invention from the back surface sheet side.
- 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
- FIG. 3 is a cross-sectional view taken along the line II-II after the disposable diaper of FIG. 1 has absorbed a small amount of body fluid.
- the disposable diaper 1 of the present embodiment (hereinafter also referred to as “diaper 1”) has a top sheet 2 disposed on the skin facing surface side and a back surface disposed on the non-skin facing surface side.
- a sheet 3 and a vertically long absorbent body 4 arranged between the two sheets 2 and 3 are provided, and an indicator 5 for informing excretion by a color change is continuous between the back sheet 3 and the absorbent body 4 in the vertical direction. Is arranged.
- the diaper 1 is formed symmetrically with respect to a center line CL extending in the vertical direction.
- the diaper 1 is a longitudinal direction (hereinafter also referred to as “Y direction”) when the diaper 1 is unfolded.
- Y direction direction parallel to the center line CL
- Abdominal part A, dorsal part B, and crotch part C positioned between A and B.
- the abdomen A is a part located on the wearer's abdomen when the diaper is worn
- the dorsal part B is a part located on the wearer's back
- the crotch C is located on the inseam of the wearer. It is a part to do.
- the crotch part C is located in the central part of the diaper 1 in the vertical direction (Y direction).
- the direction orthogonal to the vertical direction (Y direction) will be described as the horizontal direction of the diaper 1 (hereinafter also referred to as “X direction”).
- the “skin facing surface” is a surface disposed on the skin side of the wearer when worn, out of the front and back surfaces of each member such as the surface sheet 2 constituting the diaper 1.
- the “surface” is a surface that is directed to the side opposite to the skin side of the wearer when wearing, out of the front and back surfaces of each member such as the surface sheet 2.
- the diaper 1 has left and right side edges of the abdominal side A and left and right side edges of the back side B extending laterally (X direction) outward from the left and right side edges of the crotch C. ing.
- the left and right side edges of the crotch portion C are convexly curved inward in the lateral direction (X direction), and the central part in the longitudinal direction (Y direction) is constricted inward as a whole.
- the top sheet 2 and the back sheet 3 respectively extend outward from the left and right side edges and front and rear end edges of the absorber 4.
- the surface sheet 2 has a lateral dimension (X direction) smaller than a lateral dimension (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 peripheral edge of the absorbent body 4, and sandwiches and fixes the absorbent body 4 is doing.
- the diaper 1 is a so-called unfolded diaper.
- a pair of fastening tapes 7 and 7 are provided on the left and right edges of the back side B, and the outer surface (non-skin) of the abdominal side A is provided.
- a landing tape 8 for fastening the fastening tapes 7 is provided on the opposing surface.
- a three-dimensional gather forming sheet 62 having elastic members 61 fixed in an expanded state in the Y direction is provided on both side portions along the longitudinal direction (Y direction) of the diaper 1.
- a pair of three-dimensional gathers 6 and 6 are formed by being arranged and fixed on the side portions. Moreover, as shown in FIG.
- the leg elastic member 63 for leg gather formation is distribute
- Leg gathers are formed by the contraction of the leg elastic members 63.
- the waist part elastic member 64 for waist gathers formation is distribute
- the absorbent body 4 has an absorbent core 41 containing an absorbent polymer, and the diaper 1 has a covering 42 that wraps the absorbent core 41.
- the absorbent core 41 is wrapped with a covering material 42.
- the absorbent body 4 includes a liquid-retaining absorbent core 41 that is long in the longitudinal direction (Y direction), and a covering material that is a liquid-permeable hydrophilic sheet as shown in FIG. 2. 42 is formed.
- the covering material 42 of the diaper 1 has an absorbent portion 41 by forming an overlapping portion 420 where side edge portions of the covering material 42 overlap each other on the back sheet 3 side of the absorbent core 41.
- the core 41 is wrapped around.
- the absorbent body 4 of the diaper 1 is formed by wrapping the absorbent core 41 with the covering material 42 in this way.
- the absorbent core 41 has a relatively high basis weight, a high basis weight portion 43 that is convex on the back sheet 3 side, and a relatively low basis weight adjacent to the high basis weight portion 43, so that the top sheet is from the back sheet 3 side. And a low basis weight portion 44 that is recessed toward the second side. More specifically, in the diaper 1, as shown in FIG. 1 and FIG. 2, the absorbent core 41 constituting the absorbent body 4 has a high basis weight portion 43 in which the absorbent material is larger than the low basis weight portion 44. The absorbent material has a low basis weight portion 44 (44X, 44Y) that is less than the high basis weight portion 43. As shown in FIG.
- the absorbent core 41 has a linear (continuous linear) low basis weight portion 44 ⁇ / b> X extending in the lateral direction (X direction) and a linear (continuous linear) extending in the vertical direction (Y direction).
- a plurality of low basis weight portions 44Y As shown in FIG. 1, the low basis weight portion 44 includes a linear low basis weight portion 44 ⁇ / b> X extending in the horizontal direction (X direction) and a linear low basis weight portion 44 ⁇ / b> Y extending in the vertical direction (Y direction). The whole is formed in a lattice shape, and the high basis weight portion 43 is disposed in a portion (the position of the lattice eye) partitioned by these linear low basis weight portions 44X and 44Y.
- the high basic weight part 43 and the low basic weight part 44 of the absorptive core 41 are integrally molded.
- “being integrally formed” means that the high basis weight portion 43 and the low basis weight portion 44 are integrated so as not to be separated from each other without using a bonding means such as an adhesive or heat fusion, It means that it is integrally formed from the same material.
- a bonding means such as an adhesive or heat fusion
- the absorptive core 41 has the high basic weight part 43 and the low basic weight part 44 (44X) alternately in the direction where the indicator 5 is extended on the side to which the indicator 5 of the back sheet 3 is provided.
- a concavo-convex structure is formed. That is, the absorbent core 41 is flat on the top sheet 2 side, and an uneven structure is formed on the back sheet 3 side facing the indicator 5.
- the high basis weight portion 43 is convex on the back sheet 3 side
- the low basis weight portion 44 (44X, 44Y) is recessed on the top sheet 2 side.
- the concave portion (groove) that is recessed toward the topsheet 2 side in the concave-convex structure of the absorbent core 41 is formed mainly by the low basis weight portions 44 (44X, 44Y), and the backsheet in the concave-convex structure of the absorbent core 41
- the convex portion protruding to the 3 side is mainly formed by the high basis weight portion 43.
- “the recess is mainly formed by the low basis weight portion 44” means that the high basis weight portion 43 near the boundary between the low basis weight portion 44 and the high basis weight portion 43 forms a part of the recess.
- the convex portion is mainly formed by the high basis weight portion 43
- the low basis weight in the vicinity of the boundary between the high basis weight portion 43 and the low basis weight portion 44. This means that the amount portion 44 forms a part of the convex portion.
- the direction in which the indicator 5 extends is a direction extending in the vertical direction as shown in FIG. 1, and is the same direction as the direction parallel to the center line CL (Y direction).
- the absorbent core 41 has an uneven structure on the back sheet 3 side above the indicator 5 and facing the indicator 5. That is, as shown in FIG. 1, the back sheet 3 side of the absorbent core 41 facing the indicator 5 has a linear low basis weight portion 44 ⁇ / b> X extending in the horizontal direction (X direction) in the vertical direction (Y direction). High basis weight portions 43 are alternately arranged to form a concavo-convex structure.
- the low basic weight part 44 is unevenly distributed in the surface sheet 2 side (the skin opposing surface side of the absorber 4) in the thickness direction T of the diaper 1, as shown in FIG.
- the surface sheet 2 side is flat as shown in FIG.
- FIG. 7 a plan view (FIG. 7) in which the absorbent core 41 of the diaper 1 is viewed from the back sheet 3 side.
- the high basic weight part 43 partitioned by the low basic weight part 44X extended in a horizontal direction (X direction) and the low basic weight part 44Y extended in a vertical direction (Y direction).
- seven irregular block-like structures regularly arranged in the lateral direction (X direction) are regularly arranged in the vertical direction (Y direction) from the ventral side A to the back side B in 14 rows.
- a block-shaped region 411 is formed.
- eight low basis weight portions 44 ⁇ / b> Y extending in the vertical direction (Y direction) are straight from the ventral side A to the back side B, respectively. It is arranged in a shape.
- the total length in the vertical direction (Y direction) is preferably 250 mm or more and 550 mm or less, and the total width in the horizontal direction (X direction) is preferably 50 mm or more and 200 mm or less.
- the average length in the direction (Y direction) in which the indicator 5 extends in the low basis weight portion 44 (44 X) has a large amount of urine and loose stool water. From the viewpoint that it is easy to determine and specify the excretion position, the average length in the direction in which the indicator extends (Y direction) in the high basis weight portion 43 is shorter.
- the average length (L1) in the direction (Y direction) in which the indicator 5 extends in the linear low basis weight portion 44X extending in the lateral direction (X direction) is high basis weight. It is shorter than the average length (L3) in the direction in which the indicator of the portion 43 extends (Y direction).
- the average length (L1) of the low basis weight portion 44 (44X) is 3% or more of the average length (L3) of the high basis weight portion 43, preferably 5 % Or more, and 20% or less, preferably 15% or less, more specifically 3% or more and 20% or less, preferably 5% or more and 15% or less. More preferably, it is.
- “average length” means an average value of measured lengths measured at five different locations.
- the width L1 of the linear low basis weight portion 44X extending in the lateral direction (X direction) is such that the shape of the absorbent core 41 is not broken by the movement of the wearer when the absorbent article is used in, for example, a disposable diaper. From the viewpoint of limiting the indicator area where discoloration occurs with a small amount of water to a part of the indicator 5, 0.5 mm or more, preferably 1 mm or more, and 5 mm or less, preferably 3 mm or less, more specifically, It is preferably 0.5 mm or more and 5 mm or less, and more preferably 1 mm or more and 3 mm or less.
- the width L1 is a measured value at the position of the bottom of the concave portion in the concave-convex structure of the absorbent core 41.
- the high basis weight portion 43 is formed in a rectangular shape that is long in the vertical direction (Y direction) in plan view, as shown in FIG. 1.
- the high basis weight portion 43 is formed in a rectangular shape in plan view, but the four corners may have an arc shape, such as a polygonal shape, an ellipse, or a combination thereof. Also good.
- the high basis weight portion 43 of the diaper 1 can be easily determined by discoloration with a small amount of water.
- the length L3 in the longitudinal direction (Y direction) is 5 mm or more, preferably 15 mm or more, and 30 mm or less, preferably 25 mm or less, as shown in FIG. More specifically, it is preferably 5 mm or more and 30 mm or less, and more preferably 15 mm or more and 25 mm or less.
- the low basis weight portion 44 (44X) is formed from the viewpoint of easily forming a space for facilitating contact between a small amount of moisture and the indicator 5
- the basis weight is 20% or more, preferably 30% or more, and 80% or less, preferably 70% or less, more specifically 20% or more and 80% or less of the basis weight of the high basis weight portion 43. It is preferably 30% or more and 70% or less.
- the low basis weight portion 44 (44X) has a basis weight of 100 g / m 2 or more, preferably 150 g / m 2 or more, and 500 g / m 2 or less, preferably 400 g / m 2 or less.
- the high basis weight portion 43 has a basis weight of 300 g / m 2 or more, preferably 350 g / m 2 or more, and 900 g / m 2 or less, preferably 800 g / m 2 or less, more specifically, It is preferably 300 g / m 2 or more and 900 g / m 2 or less, and more preferably 350 g / m 2 or more and 800 g / m 2 or less.
- the thickness of the low basis weight portion 44 (44X) is preferably 30% or more and 90% or less of the thickness of the high basis weight portion 43. Specifically, the thickness of the low basis weight portion 44 (44X) is 1.5 mm or more, preferably 2.5 mm or more, and 4.5 mm or less, preferably 4.0 mm or less, more specifically 1 The thickness is preferably from 0.5 mm to 4.5 mm, more preferably from 2.5 mm to 4.0 mm.
- the thickness of the high basis weight portion 43 is 2 mm or more, preferably 3 mm or more, and 8 mm or less, preferably 7 mm or less, more specifically 2 mm or more and 8 mm or less, and preferably 3 mm or more and 7 mm or less. Is more preferable.
- the sample is cut to a predetermined size, the measurement site is pressurized at 5 kPa for 10 minutes, and the measurement is performed immediately after dewetting.
- the measurement location is 3 points or more including 1 point or more each of the abdominal side, crotch portion, and back side per one sheet, and the average thickness of 2 diaper samples (6 or more measurement locations) is obtained.
- the thickness of the high basis weight part 43 and the low basis weight part 44 (44X) is, for example, cutting the diaper 1 in the longitudinal direction (Y direction) or the lateral direction (X direction) shown in FIG. 1 with a sharp razor, The cross section of the cut sample is measured.
- the thickness of the high basis weight portion 43 is a value measured at the thickest position in the convex portion
- the thickness of the low basis weight portion 44 (44X) is a value measured at the thinnest position in the concave portion. If it is difficult to measure with the naked eye, the cross section of the cut sample may be observed and measured at a magnification of 20 to 100 times using, for example, a microscope (VHX-1000 manufactured by KEYENCE).
- the basic weight of the high basic weight part 43 and the low basic weight part 44 is measured as follows.
- the measuring method of the basic weight of the high basic weight part 43 and the low basic weight part 44 is as follows. Cut along the boundary line between the high basis weight portion 43 and the low basis weight portion 44 in the absorbent core 41 using a feather blade razor. Ten pieces of the high basis weight portion 43 obtained by cutting were measured using an electronic balance (Electronic balance GR-300 manufactured by A & D, accuracy: 4 digits after the decimal point). Find the average weight of the pieces. The calculated average weight is divided by the average area per piece of the high basis weight portion 43 to calculate the basis weight of the high basis weight portion 43.
- the length is designed to be 100 mm and the width is the width of the low basis weight portion 44 (44X).
- five small pieces of the thin striped low basis weight portion 44 (44X) are cut out using a single-edged razor manufactured by Feather.
- Each of the 5 pieces obtained was measured using an electronic balance (Electronic Balance GR-300, manufactured by A & D, accuracy: 4 digits after the decimal point), and averaged, the average of one piece of the low basis weight portion 44 (44X) Find the weight.
- the calculated average weight is divided by the average area per piece of the small basis weight 44 (44X) to calculate the basis weight of the low basis weight 41 (44X).
- the high basic weight part 43 is formed with substantially the same density or high density as compared with the low basic weight part 44 (44X, 44Y).
- the low basis weight portion 44 (44X, 44Y) does not break the shape of the absorbent core 41 due to the movement of the wearer, and prevents a small amount of moisture from contacting the indicator 5.
- the density is 50% or more, preferably 75% or more, and 100% or less, preferably 95% or less of the density of the high basis weight portion 43. More specifically, it is preferably 50% or more and 100% or less, and more preferably 75% or more and 95% or less.
- low basis weight portion 44 is its density, 0.05 g / cm 3 or higher, preferably 0.07 g / cm 3 or more, and, 0.15 g / cm 3 or less, preferably the 0.13 g / cm 3 or less, and more specifically, is preferably not more than 0.05 g / cm 3 or more 0.15g / cm 3, 0.07g / cm 3 or more 0.13 g / cm 3 or less More preferably it is.
- high basis weight portion 43 its density, 0.05 g / cm 3 or higher, preferably 0.07 g / cm 3 or more, and, 0.15 g / cm 3 or less, preferably 0.13 g / cm 3 or less and more specifically, it is preferably 0.05 g / cm 3 or more 0.15 g / cm 3 or less, and more preferably not more than 0.07 g / cm 3 or more 0.13 g / cm 3.
- the densities of the high basis weight portion 43 and the low basis weight portion 44 (44X, 44Y) are the thicknesses obtained by the above-described method for the basis weights of the high basis weight portion 43 and the low density portion 44 determined by the above-described method. Calculated by dividing by.
- a space 9 is formed between the low basis weight portion 44 (44 X, 44 Y) of the absorbent core 41 and the covering material 42. That is, the absorbent body 4 is formed with a space 9 formed by the uneven structure of the absorbent core 41 and the covering material 42 that wraps the absorbent core 41.
- the low basis weight portion 44 (44X, 44Y) is formed in a lattice shape as a whole on the back sheet 3 side of the absorbent core 41.
- the high basis weight portion 43 is disposed at the position of the eye, and the low basis weight portion 44 is formed so as to surround the high basis weight portion 43. Therefore, in the diaper 1, as shown in FIGS.
- the plurality of spaces 9 ⁇ / b> X formed by the low basis weight portion 44 ⁇ / b> X and the covering material 42 that are recessed toward the topsheet 2 side correspond to the low basis weight portion 44 ⁇ / b> X.
- a plurality of spaces 9Y formed by the low basis weight portion 44Y and the covering material 42 that are continuously extended in the lateral direction (X direction) and recessed on the surface sheet 2 side correspond to the low basis weight portion 44Y. Thus, they extend continuously in the vertical direction (Y direction).
- the indicator 5 that notifies excretion by a color change is continuously arranged between the back sheet 3 and the absorber 4 in the vertical direction (Y direction).
- the indicator 5 is disposed between the covering material 42 of the absorbent body 4 and the back sheet 3 as illustrated in FIG. 2, and is disposed on the skin facing surface of the back sheet 3.
- the change in the color of the indicator 5 is visible from the outside through the back sheet 3.
- the indicator 5 of the diaper 1 is arranged in a central portion in the horizontal direction (X direction) including the center line CL in a cross-sectional view of the diaper 1 as shown in FIG. 2.
- the indicator 5 of the diaper 1 is linearly arranged along the center line CL from the crotch part C to the back side part A and the crotch part B in the vertical direction (Y direction).
- the indicator 5 is arranged in the diaper 1 so that three elongated lines are arranged in parallel at equal intervals in the lateral direction (X direction).
- the indicator 5 may be formed from one or more. It may be formed.
- the indicator 5 of the diaper 1 is arranged in a straight line in the vertical direction (Y direction) from the crotch part C to the abdominal part A and the back part B, but at least on the crotch part C. What is necessary is just to be distribute
- the width W1 of the indicator 5 (the total width of the three indicators in the present embodiment) is 2 mm or more from the viewpoint of having high visibility even from the gaps of clothing when worn and not hindering the design of the back sheet.
- it is 3 mm or more and 10 mm or less, preferably 8 mm or less, more specifically 2 mm or more and 10 mm or less, and more preferably 3 mm or more and 8 mm or less.
- the covering material 42 of the diaper 1 has an overlapping portion 420 where the side edge portions of the covering material 42 overlap each other on the back sheet 3 side of the absorbent core 41 as shown in FIG.
- the absorbent core 41 is wrapped.
- the overlapping portion 420 extends on the indicator 5 along the direction in which the indicator 5 extends (Y direction).
- the overlapping portion 420 is formed on the indicator 5 along the center line CL over the entire length of the absorber 4 in the longitudinal direction (Y direction).
- the width W2 of the overlapping portion 420 is preferably the same as or wider than the width W1 of the indicator 5, and the width W2 of the overlapping portion 420 with respect to the width W1 of the indicator 5 is larger.
- the ratio (W2 / W1) is 1.0 or more, preferably 1.5 or more, and 3.0 or less, preferably 2.5, from the viewpoint of absorbing excess water of excreta in the vicinity of the indicator 5. More specifically, it is preferably 1.0 or more and 3.0 or less, and more preferably 1.5 or more and 2.5 or less.
- the width W2 of the overlapping portion 420 is 5 mm or more, preferably 10 mm or more, and 30 mm or less, preferably 25 mm or less, more specifically, 5 mm or more and 30 mm or less, preferably 10 mm or more and 25 mm. More preferably, it is as follows.
- FIG. 4 shows an embodiment of a method for manufacturing the absorbent body 4 and a manufacturing apparatus used therefor.
- the manufacturing apparatus of the absorbent body 4 includes a rotary drum 50 that is rotationally driven in the direction of arrow R1, and a duct 60 that supplies an absorbent material 45 containing an absorbent polymer that is a raw material of the absorbent core 41 to the outer peripheral surface of the rotary drum 50.
- the transfer roll 70 disposed obliquely below and downstream of the rotary drum 50 and driven to rotate in the direction of the arrow R2, and the vacuum box 65 disposed between the duct 60 and the transfer roll 70 in the circumferential direction of the rotary drum 50
- a mesh belt 75 that is a sheet-like air-permeable member disposed between the vacuum box 65 and the rotary drum 50 and between the transfer roll 70 and the rotary drum 50, and below the transfer roll 70.
- a vacuum conveyor 80 is provided.
- the rotating drum 50 has a cylindrical shape, and receives power from a prime mover such as a motor, so that members forming the outer peripheral surface rotate around a horizontal axis.
- a space 56 capable of depressurizing the inside is formed in a non-rotating portion inside the rotating drum 50 (on the rotating shaft side).
- a known exhaust device such as an intake fan is connected to the space 56, and the interior of the space 56 can be maintained at a negative pressure by operating the exhaust device.
- piping (not shown) capable of taking in air outside the apparatus is connected to the spaces 57 and 58 on the inner side (rotating shaft side) of the rotating drum 50.
- a plurality of drum recesses 51 having a shape corresponding to the shape of the absorbent core 41 to be manufactured are formed on the outer peripheral surface of the rotary drum 50 at equal intervals in the R1 direction.
- a mesh plate 52 in which a large number of pores are formed, and a metal or resin impermeable member 53 are arranged on the bottom surface of each drum recess 51.
- the air-impermeable member 53 is provided so as to protrude on the mesh plate 52, and is disposed so as to correspond to the shape and position of the low basis weight portion 44 (44X, 44Y) described above.
- the part of the outer peripheral surface of the rotating drum 50 in which the drum recessed part 51 is not formed consists of the frame body of the rotating drum 50 which consists of metal rigid bodies, and is non-breathable.
- one end side of the duct 60 covers the outer peripheral surface of the rotary drum 50 positioned on the space 56 maintained at a negative pressure, and the other end side (not shown) has a fiber material introduction device.
- the fiber material introducing device includes, for example, a pulverizer that pulverizes sheet-like wood pulp into defibrated pulp and feeds the defibrated pulp (fiber material) into the duct, and introduces an absorbent polymer into the duct 60.
- An absorbent polymer introduction part is provided.
- the transfer roll 70 has a cylindrical outer peripheral portion having air permeability, and receives the power from a prime mover such as a motor and the outer peripheral portion rotates in the R2 direction.
- a prime mover such as a motor
- the outer peripheral portion rotates in the R2 direction.
- a space 71 that can be depressurized is formed in the non-rotating portion on the inner side (rotating shaft side) of the transfer roll 70.
- a known exhaust device such as an intake fan is connected to the space 71, and the interior of the space 71 can be maintained at a negative pressure by operating the exhaust device.
- the vacuum box 65 is disposed between the downstream end 601 of the duct 60 and the transfer roll 70 in the rotation direction R1 of the rotary drum 50.
- the vacuum box 65 has a box-like shape, and has an opening that opens in the direction of the rotating drum 50 at a portion facing the rotating drum 50.
- the vacuum box 65 is connected to a known exhaust device (not shown) such as an intake fan via an exhaust pipe 67, and the inside of the vacuum box 65 can be maintained at a negative pressure by the operation of the exhaust device. .
- the mesh belt 75 is a belt-shaped breathable belt having a mesh connected endlessly, and is continuously guided along a plurality of free rolls and transfer rolls 70 to move along a predetermined route.
- the mesh belt 75 is driven by the rotation of the transfer roll 70. While the mesh belt 75 passes in front of the opening of the vacuum box 65, the mesh belt 75 is in contact with the outer peripheral surface of the rotary drum 50, and the transfer roll 70 and the rotary drum 50 are closest to each other. In the vicinity of the portion, the transfer drum 70 moves away from the outer peripheral surface of the rotating drum 50.
- the vacuum conveyor 80 includes an endless breathable belt 83 that is stretched between the drive roll 81 and the driven roll 82, and a vacuum box 84 that is disposed at a position facing the transfer roll 70 with the breathable belt 83 interposed therebetween. ing.
- the exhaust device connected to each of the space 56 in the rotary drum 50 and the vacuum box 65 is operated to make negative pressure. This is because the negative pressure in the space 56 causes an air flow that conveys the absorbent material 45 to the outer peripheral surface of the rotary drum 50 in the duct 60.
- the rotating drum 50 and the transfer roll 70 are rotated, and the vacuum conveyor 80 is operated.
- the fiber material introduction device is operated to supply the fiber material into the duct 60 and further supply the absorbent polymer, these absorbent materials 45 ride on the air flow flowing through the duct 60 and are scattered. And is supplied toward the outer peripheral surface of the rotating drum 50.
- the absorbent material (mixture of fiber material and absorbent polymer) 45 is sucked into the drum recess 51 of the rotary drum 50. As shown in FIG. 6, the absorbent material 45 gradually accumulates on the mesh plate 52 in each region 54 of the drum recess 51.
- a portion (a portion corresponding to the breathable member 53) 46a formed by depositing the absorbent material 45 on the breathable member 53 has a relatively large deposit amount of the absorbent material 45.
- the other portion (corresponding to the region 54) 46b has a relatively large deposit amount of the absorbent material 45, and the deposit 46 as a whole has a concavo-convex structure.
- the deposit 46 in the drum concave portion 51 is sucked to the mesh belt 75 by the suction from the vacuum box 65. It becomes.
- the deposit 46 in the drum recess 51 is conveyed to a position immediately before the closest portion between the transfer roll 70 and the rotary drum 50, and is sucked from the transfer roll 70 side in the vicinity of the closest portion to the mesh belt.
- the mold is released from the drum recess 51 while being sucked by 75 and moved onto the transfer roll 70.
- the deposit 46 having the concavo-convex structure transferred onto the transfer roll 70 together with the mesh belt 75 is adsorbed to the mesh belt 75 on the transfer roll 70 while being transferred to the vacuum conveyor 80 (the lowermost end of the transfer roll 70). And is transferred to the vacuum conveyor 80 by suction by the vacuum box 84 at the delivery section.
- a covering material 42 made of tissue paper or a hydrophilic nonwoven fabric is introduced onto a vacuum conveyor 80 before the deposit 46 is placed. Then, the deposit 46 moves on the covering material 42. Further, after the covering material 42 is folded by a folded plate (not shown) and the deposit 46 is wrapped with the covering material 42, the deposit 46 in the state wrapped with the covering material 42 is cut at a predetermined interval. Thus, the absorber precursor 49 cut to the size of one absorber is continuously manufactured.
- the absorber precursor 49 obtained in this way is compressed by the pressurizing means 90, and the thickness of the deposit 46 which comprises the absorber precursor 49 is actively reduced.
- the intended absorber 4 (absorbent core 41) is obtained.
- the pressurizing means 90 includes a pair of rolls 91 and 92 having at least one smooth surface, and pressurizes an object to be pressed introduced between the rolls 91 and 92 from above and below the thickness. It is configured to be compressible in the direction.
- a portion (area 54 corresponding portion) 46b having a relatively large absorbent material and a large thickness is a portion having a relatively small absorbent material 45 and a small thickness (hard breathability). It is compressed more strongly than the member 53 corresponding part) 46a.
- the portion (region 54 corresponding portion) 46b (convex portion) in the deposit 46 is relatively in the absorbent core 41.
- a high basis weight portion 43 having a high density and a portion (corresponding portion) 46a (concave portion) in the deposit 46 becomes a low basis weight portion 44 having a relatively low density in the absorbent core 41.
- the diaper 1 is formed by an adhesive (hot melt adhesive or the like) applied between the top sheet 2 and the absorber 4 and between the absorber 4 and the back sheet 3 in a pattern such as dots, spirals, stripes, etc. They are fixed to each other.
- the absorbent body 4 has the back sheet 3 and the adhesive 10 in both lateral directions (X direction) of the indicator 5. And is not fixed to the back sheet 3 in the area of the indicator 5. That is, as shown in FIG. 2, the covering material 42 and the back sheet 3 of the absorber 4 are not fixed in the region of the indicator 5, and are arranged on both sides of the indicator 5 in the lateral direction (X direction). It is fixed only via the adhesive 10 extending in the vertical direction (Y direction).
- any sheet can be used without particular limitation as long as it is normally used for absorbent articles such as disposable diapers.
- a liquid-permeable nonwoven fabric, an apertured film, or a laminate of these can be used as the top sheet 2
- a resin film or a laminate of a resin film and a nonwoven fabric can be used as the back sheet 3.
- a stretchable film, a nonwoven fabric, a woven fabric, or a laminated sheet thereof can be used as the three-dimensional gather forming sheet 62.
- the fastening tape 7 can be used without particular limitation as long as it is usually used for absorbent articles such as disposable diapers.
- male members in “Magic Tape (registered trademark)” manufactured by Kuraray Co., Ltd.
- “Quicklon (registered trademark)” manufactured by YKK
- “Majikurosu (registered trademark)” manufactured by Kanebo Bell Touch
- 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.
- the elastic member 61 for forming a three-dimensional gather, the leg elastic member 63, and the waist elastic member 64 include natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, and ethyl acrylate-ethylene.
- a thread-like stretchable material made of a polyethylene- ⁇ -olefin copolymer or the like can be used.
- the indicator 5 can be used without particular limitation as long as it is usually used for absorbent articles such as disposable diapers.
- a sheet material such as a film or non-woven fabric different from the back sheet 3 or a sheet material coated with a color material that develops, discolors, or decolors by contacting the back sheet 3 directly with excrement can be used.
- a color material a mixture of a pH indicator and an oxidation compound can be used.
- the uneven structure is formed in the side to which the indicator 5 of the back surface sheet 3 was provided.
- the diaper 1 has a space 9 formed between the recess of the low basis weight portion 44 of the absorbent core 41 and the covering material 42, and the low basis weight portion 44 and the space 9. Is touching. Therefore, when the wearer excretes excrement while wearing the diaper 1, even if the excrement has a small amount of water, the water easily passes through the space 9 and reaches the indicator 5, and the indicator 5 can be easily discolored. Thus, since the indicator 5 easily changes color, it is possible to satisfy the need to change diapers even when the amount of excrement is small.
- the indicator 5 can be easily discolored sequentially with the movement of the excrement moisture, and it is easy to visually recognize from which side of the indicator 5 the ventral side A or the back side B has started to discolor.
- the diaper 1 has an overlapping portion 420 of the hydrophilic covering material 42 wrapping the absorbent core 41 on the indicator 5 along the direction in which the indicator 5 extends (Y direction). It is extended. Therefore, the excess water of excrement can be absorbed by the overlapping portion 420, and an effect of preventing the misjudgment of a large amount of urine volume due to the diffusion of the excess water and the discolored portion of the indicator 5 spreading. Play.
- the absorber 4 is fixed via the back sheet 3 and the adhesive 10 on both sides of the indicator 5 in the lateral direction (X direction). Is not fixed to the back sheet 3. Therefore, since the contact between the indicator 5 and moisture is not hindered by the adhesive 10, there is an effect that the function of changing the color of the indicator 5 with a smaller amount of moisture is exhibited.
- the disposable diaper which is an embodiment of the absorbent article of the present invention is not limited to the disposable diaper of the above-described embodiment, and can be appropriately changed.
- the indicator 5 continuously extends in the direction parallel to the center line CL (Y direction), but continuously extends in the vertical direction. It only has to be. That is, the indicator 5 may extend obliquely in the vertical direction, or may extend in a curved shape in the vertical direction.
- the low basic weight part 44 of the absorptive core 41 which comprises the absorber 4 has the linear low shape extended in a horizontal direction (X direction).
- the basis weight portion 44X and the linear low basis weight portion 44Y extending in the vertical direction (Y direction) are formed in a lattice shape as a whole, the shape is not limited to the lattice shape.
- the absorptive core 41 of the absorber 4 has a rectangular block-shaped area
- absorbent cores 41A to 41C shown in FIGS. 8 to 10 may be provided.
- the description in detail regarding the absorbent core 41 included in the diaper 1 is applied as appropriate to points that are not particularly described. 8 to 10, the same members as those in FIGS. 1 and 7 are denoted by the same reference numerals.
- the absorbent cores 41A to 41C shown in FIG. 8 to FIG. 10 have lateral edges (X direction) outward on both side edges on the ventral side A and both side edges on the back side B than both side edges on the crotch C, respectively. And has a block-shaped region 411 formed in a shape in which the central portion in the longitudinal direction (Y direction) is constricted inward as a whole, and the shape in which the central portion in the longitudinal direction (Y direction) is constricted inward
- the non-blocking region 412 is formed.
- the back side portion 411b of the block-shaped region 411 includes a low basis weight portion 44X extending in the horizontal direction (X direction) and a low basis weight extending in the vertical direction (Y direction).
- the concavo-convex structure in which four high basis weight portions 43 partitioned by the portion 44Y are regularly arranged in the horizontal direction (X direction) is regularly arranged in four rows in the vertical direction (Y direction). Yes. Further, as shown in FIG.
- the crotch portion 411c of the block-shaped region 411 is partitioned into a low basis weight portion 44X extending in the horizontal direction (X direction) and a low basis weight portion 44Y extending in the vertical direction (Y direction).
- the uneven structure in which three high basis weight portions 43 are regularly arranged in the horizontal direction (X direction) is regularly arranged in seven rows in the vertical direction (Y direction).
- the ventral portion 411a of the block-shaped region 411 is divided into a low basis weight portion 44X extending in the horizontal direction (X direction) and a low basis weight portion 44Y extending in the vertical direction (Y direction).
- the uneven structure in which the four high basis weight portions 43 are regularly arranged in the horizontal direction (X direction) is regularly arranged in four rows in the vertical direction (Y direction).
- the low basis weight portion 44Y extending in any longitudinal direction (Y direction) is also linear from the ventral side A to the back side B. Not arranged.
- the back side portion 411b of the block-shaped region 411 has a low basis weight portion 44X extending in the horizontal direction (X direction) and a low basis weight extending in the vertical direction (Y direction).
- the concavo-convex structure in which five high basis weight portions 43 partitioned by the portion 44Y are regularly arranged in the horizontal direction (X direction) is regularly arranged in three rows in the vertical direction (Y direction).
- a concavo-convex structure in which four quantity portions 43 are regularly arranged in the horizontal direction (X direction) is regularly arranged in one row in the vertical direction (Y direction). Further, as shown in FIG.
- the crotch portion 411c of the block-shaped region 411 is divided into a low basis weight portion 44X extending in the horizontal direction (X direction) and a low basis weight portion 44Y extending in the vertical direction (Y direction).
- the uneven structure in which three high basis weight portions 43 are regularly arranged in the horizontal direction (X direction) is regularly arranged in seven rows in the vertical direction (Y direction).
- the ventral portion 411a of the block-shaped region 411 is divided into a low basis weight portion 44X extending in the horizontal direction (X direction) and a low basis weight portion 44Y extending in the vertical direction (Y direction).
- the concavo-convex structure in which four high basis weight portions 43 are regularly arranged in the horizontal direction (X direction) is regularly arranged in one row in the vertical direction (Y direction), and the high basis weight portions 43 are also regular.
- five concavo-convex structures arranged in the horizontal direction (X direction) are regularly arranged in three rows in the vertical direction (Y direction).
- the low basis weight portion 44Y extending in any longitudinal direction (Y direction) is linear from the ventral side A to the back side B. Not arranged.
- the back side portion 411b of the block-shaped region 411 has a low basis weight extending in the horizontal direction (X direction) and a low basis weight extending in the vertical direction (Y direction).
- the concavo-convex structure in which six high basis weight portions 43 partitioned by the portion 44Y are regularly arranged in the horizontal direction (X direction) is regularly arranged in three rows in the vertical direction (Y direction).
- a concavo-convex structure in which four quantity portions 43 are regularly arranged in the horizontal direction (X direction) is regularly arranged in one row in the vertical direction (Y direction). As shown in FIG.
- the crotch part 411c of the block-shaped region 411 is partitioned into a low basis weight portion 44X extending in the horizontal direction (X direction) and a low basis weight portion 44Y extending in the vertical direction (Y direction).
- a low basis weight portion 44X extending in the horizontal direction (X direction)
- a low basis weight portion 44Y extending in the vertical direction (Y direction).
- an uneven structure in which two high basis weight portions 43 are regularly arranged in the horizontal direction (X direction) is regularly arranged in seven rows in the vertical direction (Y direction).
- the ventral side portion 411a of the block-shaped region 411 is divided into a low basis weight portion 44X extending in the horizontal direction (X direction) and a low basis weight portion 44Y extending in the vertical direction (Y direction).
- the concavo-convex structure in which four high basis weight portions 43 are regularly arranged in the horizontal direction (X direction) is regularly arranged in one row in the vertical direction (Y direction), and the high basis weight portions 43 are also regular.
- six concavo-convex structures arranged in the horizontal direction (X direction) are regularly arranged in three rows in the vertical direction (Y direction).
- three of the seven low basis weight portions 44Y extending in the vertical direction (Y direction) are respectively separated from the ventral side portion A. It is arranged linearly over the side part B.
- the disposable diaper 1 of the above-mentioned embodiment is a deployment-type disposable diaper as shown in FIG. 1, a pants-type disposable diaper may be sufficient.
- absorbent articles are disclosed regarding the embodiment described above.
- the absorbent body has an absorbent core containing an absorbent polymer;
- the absorbent core has a relatively high basis weight and a convex high basis weight part on the back sheet side, and a relatively low basis weight adjacent to the high basis weight part from the back sheet side to the top sheet.
- Low basis weight portions that are recessed toward the side are alternately formed in the vertical direction, the high basis weight portions and the low basis weight portions are integrally formed, and the back sheet is provided with the indicator on the side.
- the absorbent article in which the uneven structure formed by alternately arranging the high basis weight part and the low basis weight part in the extending direction of the indicator is formed.
- the first-stage absorbent core is covered with a coating material, and a space is formed between the low basis weight portion of the absorbent core and the coating material on the back sheet side.
- ⁇ 3> In plan view, the average length in the direction in which the indicator extends in the low basis weight portion is shorter than the average length in the direction in which the indicator extends in the high basis weight portion.
- the covering material is a hydrophilic sheet, The covering material wraps the absorbent core on the back sheet side of the absorbent core by forming an overlapping portion where the side edge portions of the covering material overlap each other,
- the absorber is fixed to the back sheet and an adhesive on both lateral outer sides of the indicator, and is not fixed to the back sheet in the indicator region.
- the absorbent article according to any one of ⁇ 6>.
- the absorbent article has left and right side edges on the abdominal side and left and right side edges on the back side extending laterally outward from the left and right side edges of the crotch part, and the left and right side edges of the crotch part are sideways.
- the upper side sheet and the back sheet are respectively curved on the left and right sides of the absorber.
- Absorbent article as described in 1. ⁇ 9> The absorbent body according to ⁇ 1> to ⁇ 8>, wherein the absorbent body is formed by coating a liquid-retaining absorbent core that is long in the vertical direction with the coating material that is a liquid-permeable hydrophilic sheet.
- the low basis weight portion is unevenly distributed on the topsheet side in the thickness direction of the absorbent article, and the topsheet side is flat ⁇ 1>.
- the low basis weight portion has an average length of 5% or more and 15% or less of an average length of the high basis weight portion in the longitudinal direction.
- the indicator is disposed between the covering material of the absorber and the back sheet, and is disposed on the skin-facing surface of the back sheet.
- ⁇ 13> The indicator according to any one of ⁇ 1> to ⁇ 12>, wherein the indicator is disposed in a laterally central portion including a center line when the absorbent article is viewed in cross section in the lateral direction. Absorbent article.
- the indicator in any one of the above items ⁇ 1> to ⁇ 13>, in the vertical direction, the indicator is linearly arranged along the center line from the crotch part to the back side part and the crotch part 2.
- ⁇ 15> The absorbent article according to any one of ⁇ 1> to ⁇ 14>, wherein the indicator is arranged so that three elongated lines are arranged in parallel at equal intervals in the lateral direction.
- the indicator 5 has a width of 2 mm to 10 mm, or 3 mm to 8 mm.
- the covering material wraps the absorbent core by forming an overlapping portion where side edge portions of the covering material overlap each other on the back sheet side of the absorbent core. Extending over the indicator along the direction in which the indicator extends, and the overlapping portion is formed along the center line on the indicator over the entire length of the absorber in the longitudinal direction; The width of the overlapping portion in the lateral direction is equal to or wider than the width of the indicator, and the ratio of the width W2 of the overlapping portion 420 to the width W1 of the indicator 5 (width of the overlapping portion 420 / indicator). 5.
- the absorbent article according to any one of ⁇ 1> to ⁇ 16>, wherein a width of 5 is 1.0 to 3.0, or 1.5 to 2.5.
- the absorptive core constituting the absorbent body an absorbent polymer particle held in an aggregate of fibers such as pulp fibers is used.
- the covering material constituting the absorbent body is hydrophilic.
- a sheet material such as a film or a non-woven fabric different from the back sheet, or a color material that is colored, discolored, or decolored by contacting the excrement directly on the back sheet
- a mixture of a pH indicator and an oxidizing compound is used as a coloring material.
- a pair of fastening tapes are provided on the left and right side edges of the back side part, and a landing tape for fastening the fastening tape is provided on the outer surface of the abdominal side part, and the longitudinal direction of the absorbent article
- a sheet for forming a three-dimensional gather having an elastic member fixed in a stretched state in the longitudinal direction is arranged and fixed on a side portion of the top sheet, thereby forming a pair of three-dimensional gathers.
- a plurality of leg elastic members for forming leg gathers are extended in the longitudinal direction on both side portions along the longitudinal direction of the absorbent article, and the leg gathers are contracted by the contraction of the leg elastic members.
- a waist elastic member for forming waist gathers is disposed in an extended state in the lateral direction at the longitudinal end on the back side of the absorbent article.
- the absorbent article according to ⁇ 20> which waist gather is formed by contraction of the waist elastic members.
- ⁇ 22> As the top sheet, a liquid-permeable non-woven fabric, a perforated film, or a laminate thereof is used.
- As the back sheet a resin film or a laminate of the resin film and the non-woven fabric is used, and the three-dimensional gathering is performed.
- the elastic member for forming a three-dimensional gather, the leg elastic member, and the waist elastic member include natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, ethyl acrylate-
- ⁇ 24> The absorbent article according to any one of ⁇ 1> to ⁇ 19>, wherein the absorbent article is a pants-type disposable diaper.
- the indicator can be easily discolored even when the excreta has a small amount of water.
- the indicator easily changes color, it is possible to satisfy the need to change diapers even when the amount of excrement is small.
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Abstract
Description
尚、特許文献2には、平面方向に延設された溝状の空間が形成された吸収体を備えた吸収性物品において、インジケーターを前記吸収体に対してどのように配するかに関して何ら記載されていない。 As described above, the disposable diaper described in
In
本明細書において、「肌対向面」とは、おむつ1を構成する表面シート2などの各部材の表裏両面のうち、着用時に着用者の肌側に配される面であり、「非肌対向面」とは、表面シート2などの各部材の表裏両面のうち、着用時に着用者の肌側とは反対側に向けられる面である。 The
In the present specification, the “skin facing surface” is a surface disposed on the skin side of the wearer when worn, out of the front and back surfaces of each member such as the
おむつ1においては、図7に示すように、横方向(X方向)に延びる低坪量部44Xと、縦方向(Y方向)に延びる低坪量部44Yとで区画された高坪量部43が、規則的に横方向(X方向)に7個配されたブロック状の凹凸構造が、腹側部Aから背側部Bに亘って、規則的に縦方向(Y方向)に14行配されて、ブロック形状領域411が形成されている。おむつ1のブロック形状領域411においては、図7に示すように、8本の縦方向(Y方向)に延びる低坪量部44Yが、それぞれ、腹側部Aから背側部Bに亘って直線状に配されている。 The concavo-convex structure of the
In the
おむつ1の吸収性コア41においては、図1に示すように、低坪量部44(44X)におけるインジケーター5の延びる方向(Y方向)の平均長さが、尿や軟便の水分量の多寡の判断及び排泄位置の特定が容易となるという観点から、高坪量部43におけるインジケーターの延びる方向(Y方向)の平均長さよりも短くなっている。具体的には、吸収性コア41においては、横方向(X方向)に延びる線状の低坪量部44Xのインジケーター5の延びる方向(Y方向)の平均長さ(L1)が、高坪量部43のインジケーターの延びる方向(Y方向)の平均長さ(L3)よりも短くなっている。上記効果を奏するために、さらに詳述すると、低坪量部44(44X)の平均長さ(L1)は、高坪量部43の平均長さ(L3)の、3%以上、好ましくは5%以上の長さ、そして、20%以下、好ましくは15%以下の長さ、より具体的には、3%以上20%以下の長さであることが好ましく、5%以上15%以下の長さであることが更に好ましい。ここで「平均長さ」とは、異なる5箇所で測定した測定長さの平均値を意味する。 When the
In the
横方向(X方向)に延びる線状の低坪量部44Xの幅L1は、吸収性物品が例えば使い捨ておむつに用いられる場合においては、装着者の動きによって吸収コア41の形状が壊れず、また少量の水分で変色が発生するインジケーターの領域をインジケーター5の一部に制限するという観点から、0.5mm以上、好ましくは1mm以上、そして、5mm以下、好ましくは3mm以下、より具体的には、0.5mm以上5mm以下であることが好ましく、1mm以上3mm以下であることが更に好ましい。
尚、幅L1は、吸収性コア41の凹凸構造における凹部の底部の位置での測定値である。 Hereinafter, the size and basis weight of the high
The width L1 of the linear low
The width L1 is a measured value at the position of the bottom of the concave portion in the concave-convex structure of the
おむつ1の高坪量部43は、吸収性物品が例えば使い捨ておむつに用いられる場合においては、少量の水分での変色が容易に判断可能となるために少量の水分によって変色するインジケーター部がインジケーター5の全域にわたって適度に分散されるという観点から、図1に示すように、その縦方向(Y方向)の長さL3が、5mm以上、好ましくは15mm以上、そして、30mm以下、好ましくは25mm以下、より具体的には、5mm以上30mm以下であることが好ましく、15mm以上25mm以下であることが更に好ましい。 In the
When the absorbent article is used for a disposable diaper, for example, the high
具体的には、低坪量部44(44X)は、その坪量が、100g/m2以上、好ましくは150g/m2以上、そして、500g/m2以下、好ましくは400g/m2以下、より具体的には、100g/m2以上500g/m2以下であることが好ましく、150g/m2以上400g/m2以下であることが更に好ましい。また、高坪量部43は、その坪量が、300g/m2以上、好ましくは350g/m2以上、そして、900g/m2以下、好ましくは800g/m2以下、より具体的には、300g/m2以上900g/m2以下であることが好ましく、350g/m2以上800g/m2以下であることが更に好ましい。
また、低坪量部44(44X)の厚みは高坪量部43の厚みの30%以上90%以下であることが好ましい。具体的には、低坪量部44(44X)の厚みは、1.5mm以上、好ましくは2.5mm以上、そして、4.5mm以下、好ましくは4.0mm以下、より具体的には、1.5mm以上4.5mm以下であることが好ましく、2.5mm以上4.0mm以下であることが更に好ましい。高坪量部43の厚みは、2mm以上、好ましくは3mm以上、そして、8mm以下、好ましくは7mm以下、より具体的には、2mm以上8mm以下であることが好ましく、3mm以上7mm以下であることが更に好ましい。
尚、厚みは所定のサイズにサンプルをカットし、5kPaで測定部位を10分間加圧し、除重後すぐに測定を行う。測定箇所は、1枚辺り腹側部、股間部、背側部の任意それぞれ1点以上を含む3点以上とし、おむつサンプル2枚(測定箇所6点以上)の平均で厚みを出す。高坪量部43及び低坪量部44(44X)の厚みは、例えばおむつ1を、鋭利なかみそりで、図1に示す縦方向(Y方向)、又は横方向(X方向)に切断し、この切断されたサンプルの断面を測定する。高坪量部43の厚みは凸部の中で最も厚い位置で測定した値であり、低坪量部44(44X)の厚みは凹部の中で最も薄い位置で測定した値である。肉眼にて測定し難い場合には、前記切断されたサンプルの断面を、例えば、マイクロスコープ(KEYENCE社製VHX-1000)を用いて20~100倍の倍率で観察し、測定してもよい。
高坪量部43及び低坪量部44の坪量は次のようにして測定される。 In the case where the absorbent article is used for a disposable diaper, for example, the low basis weight portion 44 (44X) is formed from the viewpoint of easily forming a space for facilitating contact between a small amount of moisture and the
Specifically, the low basis weight portion 44 (44X) has a basis weight of 100 g / m 2 or more, preferably 150 g / m 2 or more, and 500 g / m 2 or less, preferably 400 g / m 2 or less. More specifically, it is preferably 100 g / m 2 or more and 500 g / m 2 or less, and more preferably 150 g / m 2 or more and 400 g / m 2 or less. The high
The thickness of the low basis weight portion 44 (44X) is preferably 30% or more and 90% or less of the thickness of the high
The sample is cut to a predetermined size, the measurement site is pressurized at 5 kPa for 10 minutes, and the measurement is performed immediately after dewetting. The measurement location is 3 points or more including 1 point or more each of the abdominal side, crotch portion, and back side per one sheet, and the average thickness of 2 diaper samples (6 or more measurement locations) is obtained. The thickness of the high
The basic weight of the high
高坪量部43及び低坪量部44の坪量の測定方法は以下の通りである。
吸収性コア41における高坪量部43と低坪量部44の境界線に沿ってフェザー社製片刃剃刀を用いて切断する。切断して得られた高坪量部43の小片10個をそれぞれ電子天秤(A&D社製電子天秤GR-300、精度:小数点以下4桁)を用いて測定し、高坪量部43の小片1個の平均重量を求める。求めた平均重量を高坪量部43の小片1個当りの平均面積で除して高坪量部43の坪量を算出する。
次いで、高坪量部43と低坪量部44(44X)の横方向(X方向)に延びた境界線に沿って、長さ100mm、幅は低坪量部44(44X)の幅の設計寸法に合わせて、フェザー社製片刃剃刀を用いて、細いストライプ状の低坪量部44(44X)の小片5個を切り出す。得られた小片5個をそれぞれ電子天秤(A&D社製電子天秤GR-300、精度:小数点以下4桁)を用いて測定し、平均して低坪量部44(44X)の小片1個の平均重量を求める。求めた平均重量を低坪量部44(44X)の小片1個当たりの平均面積で除して低坪量部41(44X)の坪量を算出する。 <Measurement method of basis weight>
The measuring method of the basic weight of the high
Cut along the boundary line between the high
Next, along the boundary line extending in the lateral direction (X direction) of the high
低坪量部44(44X,44Y)は、吸収性物品が例えば使い捨ておむつに用いられる場合においては、装着者の動きによって吸収コア41の形状が壊れず、少量の水分とインジケーター5との接触を容易にするために水分の拡散性を向上させるという観点から、その密度が、高坪量部43の密度の、50%以上、好ましくは75%以上、そして、100%以下、好ましくは95%以下、より具体的には、50%以上100%以下であることが好ましく、75%以上95%以下であることが更に好ましい。
具体的には、低坪量部44(44X,44Y)は、その密度が、0.05g/cm3以上、好ましくは0.07g/cm3以上、そして、0.15g/cm3以下、好ましくは0.13g/cm3以下、より具体的には、0.05g/cm3以上0.15g/cm3以下であることが好ましく、0.07g/cm3以上0.13g/cm3以下であることが更に好ましい。また、高坪量部43は、その密度が、0.05g/cm3以上、好ましくは0.07g/cm3以上、そして、0.15g/cm3以下、好ましくは0.13g/cm3以下、より具体的には、0.05g/cm3以上0.15g/cm3以下であることが好ましく、0.07g/cm3以上0.13g/cm3以下であることが更に好ましい。
高坪量部43及び低坪量部44(44X,44Y)の密度は、上述した方法により求めた高坪量部43及び低密度部44の坪量を、上述した方法により求めたそれぞれの厚みで除して算出される。 In the
When the absorbent article is used in a disposable diaper, for example, the low basis weight portion 44 (44X, 44Y) does not break the shape of the
Specifically, low basis weight portion 44 (44X, 44Y) is its density, 0.05 g / cm 3 or higher, preferably 0.07 g / cm 3 or more, and, 0.15 g / cm 3 or less, preferably the 0.13 g / cm 3 or less, and more specifically, is preferably not more than 0.05 g / cm 3 or more 0.15g / cm 3, 0.07g / cm 3 or more 0.13 g / cm 3 or less More preferably it is. Also, high
The densities of the high
図4には、吸収体4の製造方法の一実施態様及びそれに用いる製造装置が示されている。吸収体4の製造装置は、矢印R1方向に回転駆動される回転ドラム50と、回転ドラム50の外周面に吸収性コア41の原料である吸収ポリマーを含む吸収性材料45を供給するダクト60と、回転ドラム50の下流側の斜め下方に配置され、矢印R2方向に回転駆動されるトランスファーロール70と、回転ドラム50の周方向におけるダクト60とトランスファーロール70との間に配置されたバキュームボックス65と、バキュームボックス65と回転ドラム50との間及びトランスファーロール70と回転ドラム50との間を通るように配された、シート状の通気性部材であるメッシュベルト75と、トランスファーロール70の下方に配されたバキュームコンベア80とを備えている。 Next, the manufacturing method of the
FIG. 4 shows an embodiment of a method for manufacturing the
先ず、回転ドラム50内の空間56、及びバキュームボックス65内を、それぞれに接続された排気装置を作動させて負圧にする。このように、空間56内を負圧にすることで、ダクト60内に、吸収性材料45を回転ドラム50の外周面に搬送させる空気流が生じるからである。次に、回転ドラム50及びトランスファーロール70を回転させ、また、バキュームコンベア80を作動させる。そして、前記繊維材料導入装置を作動させて、ダクト60内に繊維材料を供給し、更には吸収ポリマーを供給すると、これらの吸収性材料45は、ダクト60内を流れる空気流に乗り、飛散状態となって回転ドラム50の外周面に向けて供給される。 Next, a method for continuously manufacturing the absorbent body 4 (absorbent core 41) using the above-described absorbent body manufacturing apparatus will be described.
First, the exhaust device connected to each of the
特に吸収体4と裏面シート3との間に関し、おむつ1においては、図2に示すように、吸収体4は、インジケーター5の横方向(X方向)両外方において裏面シート3と接着剤10を介して固定されており、インジケーター5の領域においては裏面シート3と固定されていない。即ち、図2に示すように、吸収体4の被覆材42と裏面シート3とは、インジケーター5の領域においては固定されておらず、インジケーター5の横方向(X方向)両外方それぞれに配された縦方向(Y方向)に延びる接着剤10を介してのみ固定されている。 The
In particular, regarding the space between the
表面シート2、裏面シート3、立体ギャザー形成用シート62としては、通常、使い捨ておむつ等の吸収性物品に用いられるものであれば、特に制限なく用いることができる。例えば、表面シート2としては、液透過性の不織布や、開孔フィルム、これらの積層体等を用いることができ、裏面シート3としては、樹脂フィルムや樹脂フィルムと不織布の積層体等を用いることができる。立体ギャザー形成用シート62としては、伸縮性のフィルム、不織布、織物またはそれらの積層シート等を用いることができる。
ファスニングテープ7としては、通常、使い捨ておむつ等の吸収性物品に用いられるものであれば、特に制限なく用いることができる。例えば、「マジックテープ(登録商標)」(クラレ社製)、「クイックロン(登録商標)」(YKK社製)、「マジクロス(登録商標)」(カネボウベルタッチ社製)等におけるオス部材等を用いることができる。 The formation material of the
As the
The
立体ギャザー形成用の弾性部材61、レッグ弾性部材63、及びウエスト部弾性部材64としては、天然ゴム、ポリウレタン、ポリスチレン-ポリイソプレン共重合体、ポリスチレン-ポリブタジエン共重合体、アクリル酸エチル-エチレン等のポリエチレン-αオレフィン共重合体等からなる糸状の伸縮性材料を用いることができる。 As the
Examples of the
おむつ1は、図1,図2に示すように、吸収性コア41は、裏面シート3のインジケーター5が付与された側に凹凸構造が形成されている。言いかえればインジケーター5に対向する裏面シート3側に、吸収性コア41の高坪量部43及び低坪量部44がインジケーター5の延びる方向(Y方向)に交互に配されてなる凹凸構造が形成されている。そのため、インジケーター5を容易に変色させることができる。また、おむつ1は、図3に示すように、吸収性コア41の低坪量部44の凹みと被覆材42との間に空間9が形成されており、低坪量部44と空間9とが接している。その為、おむつ1の着用中に、着用者が排泄物を排泄すると、例え排泄物の水分が少量であったとしても、空間部9を通過してインジケーター5に該水分が到達し易く、インジケーター5を容易に変色させることができる。このようにインジケーター5が容易に変色するので、排泄物が少量である場合にもおむつ交換をしたいというニーズを満たすことができる。また、おむつ1においては、高坪量部43及び低坪量部44がインジケーター5の延びる方向(Y方向)に交互に配されているので、低坪量部44に対応する位置に形成される空間9が複数個インジケーター5の延びる方向(Y方向)に間欠的に形成されている。その為、排泄物の水分の移行に伴ってインジケーター5を順次容易に変色させることができ、インジケーター5における腹側部A及び背側部Bの何れ側から変色し始めたのかを視認し易い。このように腹側部A及び背側部Bの何れ側から変色し始めたのかが視認できると、例えば腹側部A側から変色し始めると尿であり、背側部B側から変色し始めると軟便であると推測することができる。 The effect at the time of using the
As for the
<1>肌対向面側に配された表面シートと、非肌対向面側に配された裏面シートと、これら両シート間に配された縦長の吸収体とを備え、該裏面シートと該吸収体との間に、色の変化により排泄を知らせるインジケーターが縦方向に連続的に配された吸収性物品であって、
前記吸収体は、吸収ポリマーを含む吸収性コアを有し、
前記吸収性コアは、相対的に坪量が高く前記裏面シート側に凸の高坪量部と、該高坪量部に隣接して相対的に坪量が低く前記裏面シート側から前記表面シート側に向けて凹んだ低坪量部とが縦方向に交互に形成され、該高坪量部及び該低坪量部は一体成形されており、前記裏面シートの前記インジケーターが付与された側に、前記高坪量部及び前記低坪量部が該インジケーターの延びる方向に交互に配されてなる凹凸構造が形成されている吸収性物品。 The following absorbent articles are disclosed regarding the embodiment described above.
<1> A surface sheet disposed on the skin facing surface side, a back sheet disposed on the non-skin facing surface side, and a vertically long absorber disposed between both sheets, the back sheet and the absorption An absorbent article in which an indicator that informs excretion by a change in color is continuously arranged in the vertical direction between the body,
The absorbent body has an absorbent core containing an absorbent polymer;
The absorbent core has a relatively high basis weight and a convex high basis weight part on the back sheet side, and a relatively low basis weight adjacent to the high basis weight part from the back sheet side to the top sheet. Low basis weight portions that are recessed toward the side are alternately formed in the vertical direction, the high basis weight portions and the low basis weight portions are integrally formed, and the back sheet is provided with the indicator on the side. The absorbent article in which the uneven structure formed by alternately arranging the high basis weight part and the low basis weight part in the extending direction of the indicator is formed.
<3>平面視して、前記低坪量部における前記インジケーターの延びる方向の平均長さは、前記高坪量部における前記インジケーターの延びる方向の平均長さよりも短い前記<1>又は<2>に記載の吸収性物品。
<4>前記低坪量部の前記平均長さは、前記高坪量部の前記平均長さの3%以上20%以下の長さである前記<3>に記載の吸収性物品。
<5>前記低坪量部の坪量は、前記高坪量部の坪量の20%以上80%以下の坪量である前記<1>~<4>の何れか1に記載の吸収性物品。
<6>前記被覆材は、親水性シートであり、
前記被覆材は、前記吸収性コアの前記裏面シート側に、該被覆材の側縁部どうしの重なる重なり部を形成して該吸収性コアを包んでおり、
前記重なり部は、前記インジケーターの延びる方向に沿って該インジケーター上に延在している前記<1>~<5>の何れか1に記載の吸収性物品。
<7>前記吸収体は、前記インジケーターの横方向両外方において前記裏面シートと接着剤を介して固定されており、該インジケーターの領域においては該裏面シートと固定されていない前記<1>~<6>の何れか1に記載の吸収性物品。
<8>前記吸収性物品は、腹側部の左右両側縁及び背側部の左右両側縁それぞれが股下部の左右両側縁よりも横方向外方に延出し、股下部の左右両側縁が横方向内方に向かって凸状に湾曲しており、全体として縦方向中央部が内方に括れた形状を有しており、前記表面シート及び前記裏面シートはそれぞれ、前記吸収体の左右両側縁及び前後両端縁から外方に延出しており、該表面シートは、その横方向の寸法が、該裏面シートの横方向の寸法より小さくなっている前記<1>~<7>の何れか1に記載の吸収性物品。
<9>前記吸収体は、縦方向に長い液保持性の吸収性コアを、液透過性の親水性シートである前記被覆材で被覆して形成されている前記<1>~<8>の何れか1に記載の吸収性物品。
<10>前記吸収性コアは、前記低坪量部が、前記吸収性物品の厚み方向において、前記表面シート側に偏在しており、その該表面シート側が、平坦となっている前記<1>~<9>の何れか1に記載の吸収性物品。 <2> The first-stage absorbent core is covered with a coating material, and a space is formed between the low basis weight portion of the absorbent core and the coating material on the back sheet side. The absorbent article according to <1>.
<3> In plan view, the average length in the direction in which the indicator extends in the low basis weight portion is shorter than the average length in the direction in which the indicator extends in the high basis weight portion. Absorbent article as described in 1.
<4> The absorbent article according to <3>, wherein the average length of the low basis weight part is 3% or more and 20% or less of the average length of the high basis weight part.
<5> The absorptivity according to any one of <1> to <4>, wherein the basis weight of the low basis weight part is a basis weight of 20% to 80% of the basis weight of the high basis weight part. Goods.
<6> The covering material is a hydrophilic sheet,
The covering material wraps the absorbent core on the back sheet side of the absorbent core by forming an overlapping portion where the side edge portions of the covering material overlap each other,
The absorbent article according to any one of <1> to <5>, wherein the overlapping portion extends on the indicator along a direction in which the indicator extends.
<7> The absorber is fixed to the back sheet and an adhesive on both lateral outer sides of the indicator, and is not fixed to the back sheet in the indicator region. The absorbent article according to any one of <6>.
<8> The absorbent article has left and right side edges on the abdominal side and left and right side edges on the back side extending laterally outward from the left and right side edges of the crotch part, and the left and right side edges of the crotch part are sideways. The upper side sheet and the back sheet are respectively curved on the left and right sides of the absorber. Any one of the above <1> to <7>, wherein the top sheet extends outward from both front and rear edges, and the lateral dimension of the top sheet is smaller than the lateral dimension of the back sheet. Absorbent article as described in 1.
<9> The absorbent body according to <1> to <8>, wherein the absorbent body is formed by coating a liquid-retaining absorbent core that is long in the vertical direction with the coating material that is a liquid-permeable hydrophilic sheet. The absorbent article of any one.
<10> In the absorbent core, the low basis weight portion is unevenly distributed on the topsheet side in the thickness direction of the absorbent article, and the topsheet side is flat <1>. The absorbent article according to any one of <9>.
<12>前記インジケーターは、前記吸収体の前記被覆材と前記裏面シートとの間に配されており、該裏面シートの肌対向面上に配されて該インジケーターの色の変化は、該裏面シート越しに外部から視認可能になっている前記<1>~<11>の何れか1に記載の吸収性物品。
<13>前記インジケーターは、横方向においては、前記吸収性物品を断面視して、中心線を含む横方向中央部に配されている前記<1>~<12>の何れか1に記載の吸収性物品。
<14>前記インジケーターは、縦方向においては、股下部を越えて背側部及び股下部に至るまで、中心線に沿って直線状に配されている前記<1>~<13>の何れか1に記載の吸収性物品。
<15>前記インジケーターは、横方向に3本の細長い線が等間隔を開けて並列するように配されている前記<1>~<14>の何れか1に記載の吸収性物品。
<16>前記インジケーター5の幅は、2mm以上10mm以下であるか、又は3mm以上8mm以下である前記<1>~<15>の何れか1に記載の吸収性物品。
<17>前記被覆材は、前記吸収性コアの前記裏面シート側に、該被覆材の側縁部どうしの重なる重なり部を形成して該吸収性コアを包んでおり、前記重なり部は、前記インジケーターの延びる方向に沿って該インジケーター上に延在しており、該重なり部は、縦方向においては、前記吸収体の全長に亘って、該インジケーター上に中心線に沿って形成されており、該重なり部は、横方向においては、その幅が、該インジケーターの幅と同じかそれよりも広く、該インジケーター5の幅W1に対する該重なり部420の幅W2の比(重なり部420の幅/インジケーター5の幅)は、1.0~3.0であるか、又は1.5~2.5である前記<1>~<16>の何れか1に記載の吸収性物品。
<18>前記吸収体を構成する前記吸収性コアとしては、パルプ繊維等の繊維の集合体に吸収ポリマーの粒子を保持させたものを用い、該吸収体を構成する前記被覆材としては、親水性シート、透水性の薄紙や透水性の不織布からなるコアラップシートを用いる前記<1>~<17>の何れか1に記載の吸収性物品。
<19>前記インジケーターとしては、前記裏面シートとは別のフィルム若しくは不織布等のシート材、又は該裏面シートに直接、排泄物と接触することにより発色、変色又は消色する色材を塗布したものを用い、色材としては、pH指示薬と酸化化合物の混合物を用いる前記<1>~<18>の何れか1に記載の吸収性物品。
<20>前記吸収性物品は、展開型の使い捨ておむつである前記<1>~<19>の何れか1に記載の吸収性物品。 <11> The low basis weight portion has an average length of 5% or more and 15% or less of an average length of the high basis weight portion in the longitudinal direction. <1> to <10> The absorbent article according to any one of 1.
<12> The indicator is disposed between the covering material of the absorber and the back sheet, and is disposed on the skin-facing surface of the back sheet. The absorbent article according to any one of <1> to <11>, wherein the absorbent article is visible from outside through the outside.
<13> The indicator according to any one of <1> to <12>, wherein the indicator is disposed in a laterally central portion including a center line when the absorbent article is viewed in cross section in the lateral direction. Absorbent article.
<14> In any one of the above items <1> to <13>, in the vertical direction, the indicator is linearly arranged along the center line from the crotch part to the back side part and the
<15> The absorbent article according to any one of <1> to <14>, wherein the indicator is arranged so that three elongated lines are arranged in parallel at equal intervals in the lateral direction.
<16> The absorbent article according to any one of <1> to <15>, wherein the
<17> The covering material wraps the absorbent core by forming an overlapping portion where side edge portions of the covering material overlap each other on the back sheet side of the absorbent core. Extending over the indicator along the direction in which the indicator extends, and the overlapping portion is formed along the center line on the indicator over the entire length of the absorber in the longitudinal direction; The width of the overlapping portion in the lateral direction is equal to or wider than the width of the indicator, and the ratio of the width W2 of the overlapping
<18> As the absorptive core constituting the absorbent body, an absorbent polymer particle held in an aggregate of fibers such as pulp fibers is used. The covering material constituting the absorbent body is hydrophilic. The absorbent article according to any one of <1> to <17>, wherein a core wrap sheet made of a water-permeable sheet, a water-permeable thin paper, or a water-permeable nonwoven fabric is used.
<19> As the indicator, a sheet material such as a film or a non-woven fabric different from the back sheet, or a color material that is colored, discolored, or decolored by contacting the excrement directly on the back sheet The absorbent article according to any one of <1> to <18>, wherein a mixture of a pH indicator and an oxidizing compound is used as a coloring material.
<20> The absorbent article according to any one of <1> to <19>, wherein the absorbent article is an unfolded disposable diaper.
<22>前記表面シートとしては、液透過性の不織布や、開孔フィルム、これらの積層体を用い、前記裏面シートとしては、樹脂フィルムや樹脂フィルムと不織布の積層体を用い、前記立体ギャザー形成用シートとしては、伸縮性のフィルム、不織布、織物またはそれらの積層シートを用いる前記<21>に記載の吸収性物品。
<23>前記立体ギャザー形成用の弾性部材、前記レッグ弾性部材、及び前記ウエスト部弾性部材としては、天然ゴム、ポリウレタン、ポリスチレン-ポリイソプレン共重合体、ポリスチレン-ポリブタジエン共重合体、アクリル酸エチル-エチレンのポリエチレン-αオレフィン共重合体からなる糸状の伸縮性材料を用いる前記<21>又は<22>に記載の吸収性物品。
<24>前記吸収性物品は、パンツ型使い捨ておむつである前記<1>~<19>の何れか1に記載の吸収性物品。 <21> A pair of fastening tapes are provided on the left and right side edges of the back side part, and a landing tape for fastening the fastening tape is provided on the outer surface of the abdominal side part, and the longitudinal direction of the absorbent article A sheet for forming a three-dimensional gather having an elastic member fixed in a stretched state in the longitudinal direction is arranged and fixed on a side portion of the top sheet, thereby forming a pair of three-dimensional gathers. A plurality of leg elastic members for forming leg gathers are extended in the longitudinal direction on both side portions along the longitudinal direction of the absorbent article, and the leg gathers are contracted by the contraction of the leg elastic members. Further, a waist elastic member for forming waist gathers is disposed in an extended state in the lateral direction at the longitudinal end on the back side of the absorbent article. The absorbent article according to <20> which waist gather is formed by contraction of the waist elastic members.
<22> As the top sheet, a liquid-permeable non-woven fabric, a perforated film, or a laminate thereof is used. As the back sheet, a resin film or a laminate of the resin film and the non-woven fabric is used, and the three-dimensional gathering is performed. The absorbent article according to <21>, in which a stretchable film, a nonwoven fabric, a woven fabric, or a laminate sheet thereof is used as the sheet for use.
<23> The elastic member for forming a three-dimensional gather, the leg elastic member, and the waist elastic member include natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, ethyl acrylate- The absorbent article according to <21> or <22>, wherein a thread-like stretchable material made of a polyethylene-α-olefin copolymer of ethylene is used.
<24> The absorbent article according to any one of <1> to <19>, wherein the absorbent article is a pants-type disposable diaper.
Claims (7)
- 肌対向面側に配された表面シートと、非肌対向面側に配された裏面シートと、これら両シート間に配された縦長の吸収体とを備え、該裏面シートと該吸収体との間に、色の変化により排泄を知らせるインジケーターが縦方向に連続的に配された吸収性物品であって、
前記吸収体は、吸収ポリマーを含む吸収性コアを有し、
前記吸収性コアは、相対的に坪量が高く前記裏面シート側に凸の高坪量部と、該高坪量部に隣接して相対的に坪量が低く前記裏面シート側から前記表面シート側に向けて凹んだ低坪量部とが縦方向に交互に形成され、該高坪量部及び該低坪量部は一体成形されており、前記裏面シートの前記インジケーターが付与された側に、前記高坪量部及び前記低坪量部が該インジケーターの延びる方向に交互に配されてなる凹凸構造が形成されている吸収性物品。 A surface sheet disposed on the skin facing surface side, a back sheet disposed on the non-skin facing surface side, and a vertically long absorbent body disposed between both sheets, the back sheet and the absorber In the meantime, an absorbent article in which the indicator that informs the excretion by the color change is continuously arranged in the vertical direction,
The absorbent body has an absorbent core containing an absorbent polymer;
The absorbent core has a relatively high basis weight and a convex high basis weight part on the back sheet side, and a relatively low basis weight adjacent to the high basis weight part from the back sheet side to the top sheet. Low basis weight portions that are recessed toward the side are alternately formed in the vertical direction, the high basis weight portions and the low basis weight portions are integrally formed, and the back sheet is provided with the indicator on the side. The absorbent article in which the uneven structure formed by alternately arranging the high basis weight part and the low basis weight part in the extending direction of the indicator is formed. - 前記吸収性コアが被覆材により包まれており、前期吸収性コアの前記低坪量部と前記裏面シート側の前記被覆材との間には空間が形成されている請求項1に記載の吸収性物品。 The absorption according to claim 1, wherein the absorbent core is wrapped with a covering material, and a space is formed between the low basis weight portion of the absorbent core and the covering material on the back sheet side. Sex goods.
- 平面視して、前記低坪量部における前記インジケーターの延びる方向の平均長さは、前記高坪量部における前記インジケーターの延びる方向の平均長さよりも短い請求項1又は2に記載の吸収性物品。 3. The absorbent article according to claim 1, wherein an average length of the low basis weight portion in the direction in which the indicator extends is shorter than an average length of the high basis weight portion in the direction in which the indicator extends. .
- 前記低坪量部の前記平均長さは、前記高坪量部の前記平均長さの3%以上20%以下の長さである請求項3に記載の吸収性物品。 The absorbent article according to claim 3, wherein the average length of the low basis weight part is 3% or more and 20% or less of the average length of the high basis weight part.
- 前記低坪量部の坪量は、前記高坪量部の坪量の20%以上80%以下の坪量である請求項1~4の何れか1項に記載の吸収性物品。 The absorbent article according to any one of claims 1 to 4, wherein a basis weight of the low basis weight part is a basis weight of 20% to 80% of a basis weight of the high basis weight part.
- 前記被覆材は、親水性シートであり、
前記被覆材は、前記吸収性コアの前記裏面シート側に、該被覆材の側縁部どうしの重なる重なり部を形成して該吸収性コアを包んでおり、
前記重なり部は、前記インジケーターの延びる方向に沿って該インジケーター上に延在している請求項1~5の何れか1項に記載の吸収性物品。 The covering material is a hydrophilic sheet,
The covering material wraps the absorbent core on the back sheet side of the absorbent core by forming an overlapping portion where the side edge portions of the covering material overlap each other,
The absorbent article according to any one of claims 1 to 5, wherein the overlapping portion extends on the indicator along a direction in which the indicator extends. - 前記吸収体は、前記インジケーターの横方向両外方において前記裏面シートと接着剤を介して固定されており、該インジケーターの領域においては該裏面シートと固定されていない請求項1~6の何れか1項に記載の吸収性物品。 7. The absorber according to claim 1, wherein the absorber is fixed to the back sheet via an adhesive on both lateral sides of the indicator, and is not fixed to the back sheet in the indicator region. The absorbent article according to item 1.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2014152693A RU2636568C2 (en) | 2012-06-11 | 2013-05-31 | Absorbent product |
CN201380030862.2A CN104379104B (en) | 2012-06-11 | 2013-05-31 | Absorbent commodity |
BR112014031071-8A BR112014031071B1 (en) | 2012-06-11 | 2013-05-31 | ABSORBENT ARTICLE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012131861A JP5608708B2 (en) | 2012-06-11 | 2012-06-11 | Absorbent articles |
JP2012-131861 | 2012-06-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013187261A1 true WO2013187261A1 (en) | 2013-12-19 |
Family
ID=49758089
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/065269 WO2013187261A1 (en) | 2012-06-11 | 2013-05-31 | Absorbent article |
Country Status (6)
Country | Link |
---|---|
JP (1) | JP5608708B2 (en) |
CN (1) | CN104379104B (en) |
BR (1) | BR112014031071B1 (en) |
RU (1) | RU2636568C2 (en) |
TW (1) | TWI508709B (en) |
WO (1) | WO2013187261A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10231883B2 (en) | 2015-01-23 | 2019-03-19 | Kimberly-Clark Worldwide, Inc. | Bridged absorbent structure |
WO2020105278A1 (en) * | 2018-11-22 | 2020-05-28 | ユニ・チャーム株式会社 | Absorbent article |
WO2020241554A1 (en) * | 2019-05-30 | 2020-12-03 | 花王株式会社 | Absorbent article |
RU2778056C1 (en) * | 2019-05-30 | 2022-08-15 | Као Корпорейшн | Absorbent product |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6840791B2 (en) * | 2019-06-28 | 2021-03-10 | 花王株式会社 | Absorbent article |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009119154A (en) * | 2007-11-16 | 2009-06-04 | Uni Charm Corp | Absorbent article |
JP2010075464A (en) * | 2008-09-26 | 2010-04-08 | Daio Paper Corp | Disposable diaper |
JP2012029965A (en) * | 2010-08-02 | 2012-02-16 | Unicharm Corp | Disposable wearing article |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0553625U (en) * | 1991-11-08 | 1993-07-20 | 王子製紙株式会社 | Disposable diaper |
KR101223832B1 (en) * | 2005-03-23 | 2013-01-17 | 가오 가부시키가이샤 | Absorbent articles |
JP2006297071A (en) * | 2005-03-24 | 2006-11-02 | Kao Corp | Absorbent article |
WO2009084642A1 (en) * | 2007-12-28 | 2009-07-09 | Daio Paper Corporation | Disposable absorbent article |
JP5075703B2 (en) * | 2008-03-26 | 2012-11-21 | 王子ネピア株式会社 | Absorbent articles |
-
2012
- 2012-06-11 JP JP2012131861A patent/JP5608708B2/en active Active
-
2013
- 2013-05-31 WO PCT/JP2013/065269 patent/WO2013187261A1/en active Application Filing
- 2013-05-31 CN CN201380030862.2A patent/CN104379104B/en active Active
- 2013-05-31 BR BR112014031071-8A patent/BR112014031071B1/en not_active IP Right Cessation
- 2013-05-31 RU RU2014152693A patent/RU2636568C2/en active
- 2013-06-11 TW TW102120805A patent/TWI508709B/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009119154A (en) * | 2007-11-16 | 2009-06-04 | Uni Charm Corp | Absorbent article |
JP2010075464A (en) * | 2008-09-26 | 2010-04-08 | Daio Paper Corp | Disposable diaper |
JP2012029965A (en) * | 2010-08-02 | 2012-02-16 | Unicharm Corp | Disposable wearing article |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10231883B2 (en) | 2015-01-23 | 2019-03-19 | Kimberly-Clark Worldwide, Inc. | Bridged absorbent structure |
WO2020105278A1 (en) * | 2018-11-22 | 2020-05-28 | ユニ・チャーム株式会社 | Absorbent article |
JP2020081342A (en) * | 2018-11-22 | 2020-06-04 | ユニ・チャーム株式会社 | Absorbent article |
JP7209421B2 (en) | 2018-11-22 | 2023-01-20 | ユニ・チャーム株式会社 | absorbent article |
WO2020241554A1 (en) * | 2019-05-30 | 2020-12-03 | 花王株式会社 | Absorbent article |
JP2020195425A (en) * | 2019-05-30 | 2020-12-10 | 花王株式会社 | Absorbent article |
RU2778056C1 (en) * | 2019-05-30 | 2022-08-15 | Као Корпорейшн | Absorbent product |
Also Published As
Publication number | Publication date |
---|---|
JP5608708B2 (en) | 2014-10-15 |
RU2636568C2 (en) | 2017-11-23 |
RU2014152693A (en) | 2016-07-27 |
CN104379104A (en) | 2015-02-25 |
TW201417782A (en) | 2014-05-16 |
CN104379104B (en) | 2017-03-15 |
TWI508709B (en) | 2015-11-21 |
BR112014031071A2 (en) | 2017-06-27 |
BR112014031071B1 (en) | 2021-08-17 |
JP2013255559A (en) | 2013-12-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6012270B2 (en) | Absorbent articles | |
JP6099239B2 (en) | Absorbent articles | |
JP5997944B2 (en) | Absorbent articles | |
JP5670959B2 (en) | Absorbent articles | |
JP6050612B2 (en) | Absorbent articles | |
JP6029862B2 (en) | Absorbent articles | |
JP5670960B2 (en) | Absorbent articles | |
JP5608707B2 (en) | Absorbent articles | |
JP5997943B2 (en) | Absorbent articles | |
JP5997945B2 (en) | Pants-type absorbent article | |
JP5608708B2 (en) | Absorbent articles | |
JP5593350B2 (en) | Absorbent articles | |
JP6012269B2 (en) | Absorbent articles | |
JP6421024B2 (en) | Absorbent manufacturing method and manufacturing apparatus | |
JP5604393B2 (en) | Absorbent articles | |
JP6012273B2 (en) | Absorbent articles |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13804917 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2014/14983 Country of ref document: TR |
|
ENP | Entry into the national phase |
Ref document number: 2014152693 Country of ref document: RU Kind code of ref document: A |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112014031071 Country of ref document: BR |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 13804917 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 112014031071 Country of ref document: BR Kind code of ref document: A2 Effective date: 20141211 |