WO2016002471A1 - 吸収性物品及び該吸収性物品を備える着用物品 - Google Patents
吸収性物品及び該吸収性物品を備える着用物品 Download PDFInfo
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- WO2016002471A1 WO2016002471A1 PCT/JP2015/066911 JP2015066911W WO2016002471A1 WO 2016002471 A1 WO2016002471 A1 WO 2016002471A1 JP 2015066911 W JP2015066911 W JP 2015066911W WO 2016002471 A1 WO2016002471 A1 WO 2016002471A1
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- absorbent
- absorbent article
- sheet
- liquid
- layer
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- 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
- A61F13/534—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 an inhomogeneous composition through the thickness of the pad
- A61F13/537—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
- A61F2013/53765—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterized by its geometry
- A61F2013/53782—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterized by its geometry with holes
Definitions
- the present invention relates to an absorbent article and a wearing article provided with the absorbent article.
- Patent Document 1 describes an absorbent article in which an absorbent body in which through-holes are formed is arranged at a portion where a wearer's genital area abuts. In the absorbent article described in Patent Document 1, it is possible to improve the fit of the absorbent article to the wearer's genital area. Moreover, since the part which a wearer's shadow part contacts is difficult to become a wet state, it is possible to prevent a wearer's discomfort.
- Patent Documents 2 to 13 disclose the use of a nonwoven fabric having a convex portion formed on the surface and the top sheet of the absorbent article.
- the liquid permeability and the touch of the nonwoven fabric can be improved by the convex portions formed on the surface.
- this invention is an absorbent article provided with the top sheet in which the convex part was formed, Comprising: The shape of the convex part formed in the predetermined area
- the present invention includes a liquid-permeable top sheet, a liquid-impervious back sheet, and a liquid-absorbing absorber disposed between the top sheet and the back sheet.
- a liquid-permeable top sheet Comprising an absorbent article having a length direction, a width direction and a thickness direction orthogonal to each other, wherein the top sheet is a non-woven fabric having a skin-side surface on which convex portions are formed, and the absorber is The absorbent article having a through-hole penetrating an absorbent body in the thickness direction or a recess opening on the top sheet side is provided.
- the present invention also includes an exterior body that includes a liquid-permeable top sheet having a mounting surface on which an absorbent article is mounted, and a liquid-impermeable back sheet, and has an abdominal side portion, a crotch portion, and a back side portion. And an absorbent article of the present invention detachably attached to the skin side surface of the exterior body.
- an absorbent article provided with the top sheet in which the convex part was formed, Comprising: The shape of the convex part formed in the predetermined area
- FIG. 1 is a plan view of a urine collecting pad according to an embodiment of the present invention.
- FIG. 2 is an exploded perspective view of the urine collection pad shown in FIG. 3 is an end view taken along line AA of FIG. 4A is an end view taken along the line BB in FIG. 1 (part on the abdomen side), and
- FIG. 4B is an end view taken along line BB in FIG. ).
- FIG. 5 is an enlarged perspective view of a part of the top sheet provided in the urine collecting pad shown in FIG. 1.
- FIG. 6 is a plan view of an exterior body according to an embodiment of the present invention.
- 7 is an exploded perspective view of the exterior body shown in FIG.
- FIG. 8 is a perspective view showing a state in which the exterior body shown in FIG. 6 is deformed into a pants shape.
- FIG. 9 is a diagram for explaining a side sheet provided in the exterior body illustrated in FIG. 6.
- FIG. 10 is a partially enlarged plan view of a wearing article according to an embodiment of the present invention.
- 11 is a cross-sectional view taken along line AA in FIG.
- FIG. 12A is an overall view of the nonwoven fabric manufacturing apparatus
- FIG. 12B is an enlarged perspective view of an injection unit of the nonwoven fabric manufacturing apparatus.
- FIG. 13 is a diagram for explaining the action of the gas injected from the injection unit on the web.
- the proximal side of the virtual center line extending in the width direction through the center of the absorbent article is expressed as “inner of the length direction” and the distal side is expressed as “ It may be expressed as “outside in the length direction”.
- the proximal side of the virtual center line extending in the length direction through the center of the absorbent article is expressed as “inner side in the width direction”
- the distal side is expressed as “width direction” It may be expressed as “outside”.
- one side in the thickness direction located on the wearer's skin side is referred to as “skin side”
- the other side in the thickness direction located on the wearer's clothing side is referred to as “clothing side” "
- An absorbent article according to an aspect of the present invention (hereinafter referred to as “Aspect 1A”) is disposed between a liquid-permeable top sheet, a liquid-impermeable back sheet, and the top sheet and the back sheet.
- An absorbent article having a liquid-absorbent absorbent body and having a length direction, a width direction and a thickness direction perpendicular to each other, wherein the top sheet is a nonwoven fabric having a skin-side surface on which convex portions are formed.
- the absorbent body is the absorbent article having a through hole penetrating the absorbent body in the thickness direction or a recess opening on the top sheet side.
- the absorbent article according to aspect 1A can exhibit the following effects.
- the skin-side surface of the top sheet is convex toward the clothing side (back sheet side) with a portion other than the convex portion (for example, a concave portion) as a starting point by the force toward the inner side in the width direction applied when the absorbent article is worn.
- the absorbent body tends to be convexly deformed on the skin side (top sheet side). Therefore, when the absorbent article is worn, the top sheet tends to enter the through hole or the recess of the absorbent body.
- Urine of elderly people contains more impurities than urine of general adults. Therefore, when the convex portion is crushed by the pressing of the top sheet and the bulk and voids of the convex portion are reduced, impurities in the urine are likely to remain in the top sheet, causing a decrease in liquid permeability of the top sheet.
- the absorbent article according to aspect 1A is easy to maintain the bulk and voids of the convex portion, and therefore, an absorbent article for absorbing urine of an elderly person (especially a bedridden elderly person) (for example, a urine collecting pad). It is suitable as.
- An elderly person usually means a person 65 years or older.
- the convex part is a flange part extending in the length direction.
- the absorbent article which concerns on aspect 2A can demonstrate the following effect.
- the skin-side surface of the top sheet is likely to be convexly deformed toward the clothing side with a portion other than the heel (for example, a groove) as a starting point due to the force toward the inner side in the width direction applied when the absorbent article is worn. Therefore, when the absorbent article is worn, the top sheet tends to enter the through hole or the recess of the absorbent body.
- the through hole or the recess extends in the length direction through the center in the width direction of the absorbent body. Exists.
- the absorbent article according to aspect 3A can exhibit the following effects. Due to the force toward the inner side in the width direction applied when the absorbent article is worn, the absorbent body is likely to be convexly deformed to the skin side with the through-hole or the recessed portion as a starting point. Therefore, when the absorbent article is worn, the top sheet tends to enter the through hole or the recess of the absorbent body.
- the absorber has a first layer and a maximum width smaller than the minimum width of the first layer.
- a second layer that is located closer to the backsheet than the first layer.
- the absorbent article according to aspect 4A can exhibit the following effects. Due to the force toward the inner side in the width direction applied when the absorbent article is worn, the absorbent body tends to be convexly deformed to the skin side starting from the portion of the first layer that does not overlap the second layer. Therefore, when the absorbent article is worn, the top sheet tends to enter the through hole or the recess of the absorbent body.
- the absorbent body is a pressing part that integrates the absorbent body in the thickness direction, and It has the said pressing part formed in the outer side of the said width direction rather than the through-hole or the said recessed part.
- the absorbent article according to aspect 5A can exhibit the following effects. Due to the force toward the inner side in the width direction applied when the absorbent article is worn, the absorbent body tends to be convexly deformed to the skin side with the squeezed portion as the starting point. Therefore, when the absorbent article is worn, the top sheet tends to enter the through hole or the recess of the absorbent body. Moreover, since the shape of the through-hole or recessed part of an absorber is easy to be hold
- the content of the fiber in the thickness direction in the convex portion of the nonwoven fabric is other than the convex portion of the nonwoven fabric. It is larger than the content rate of the thickness direction oriented fiber in the portion.
- the absorbent article according to aspect 6A can exhibit the following effects. Since the content rate of the thickness direction orientation fiber in a convex part is large, even if a top sheet is pressed at the time of wear of an absorptive article, the volume and space
- an absorbent article for example, urine picking pad
- the absorbent article includes a liquid-permeable first sheet, a liquid-permeable second sheet, and the first.
- a liquid-absorbent sheet having an absorbent polymer layer disposed between one sheet and the second sheet, further comprising the liquid-absorbent sheet disposed between the top sheet and the absorber, The liquid-absorbent sheet is disposed so as not to overlap the through hole or the recess in the thickness direction.
- the absorbent article according to aspect 7A can exhibit the following effects.
- the absorbent polymer layer absorbs the liquid (for example, urine) supplied to the absorbent article and swells, the thickness of the absorbent polymer layer increases. Therefore, the swollen absorbent polymer layer functions as a pressure buffer layer, and protects the portion of the top sheet that does not overlap the absorbent polymer layer in the thickness direction from pressure. For this reason, the part which does not overlap with the absorptive polymer layer in the thickness direction among top sheets is hard to be pressed, and the shape of the convex part in this part is easy to be maintained.
- the absorbent article has an abdominal side part, a crotch part and a back side part arranged in the length direction, and the through hole Or the said recessed part is located in the said crotch part, and the said liquid absorbing sheet is located in the said back side part.
- both end edges of the absorbent polymer layer are inside the both end edges of the first absorbent layer, and the second absorbent layer It is outside the both edges.
- the width of the top sheet including at least the entire width of the second absorbent layer by having both end edges of the absorbent polymer layer inside the both end edges of the first absorbent layer and outside the both end edges of the second absorbent layer
- the first absorbent layer and the second absorbent layer even after the absorbent polymer layer has absorbed liquid and swelled It is possible to make the wearer more difficult to feel the level difference caused by the difference in size between the absorbent polymer layer and the absorbent polymer layer, and to improve the wearing feeling of the absorbent article.
- the absorbent article according to aspect 4A has the characteristics of aspect 7A, and further, both end edges of the absorbent polymer layer are inside the both end edges of the first absorbent layer in the width direction of the absorbent article, and When it has the characteristic that it exists in the outer side from the both ends of a 2nd absorption layer, it can understand from the positional relationship of the 1st absorption layer shown by the projection outline in FIG. 1, a 2nd absorption layer, and an absorptive polymer layer.
- the absorbent article becomes thinner from the central region in the width direction of the absorbent article in which the first absorbent layer, the second absorbent layer, and the absorbent polymer layer extend, the absorbent polymer layer Even if the liquid absorbs the liquid and expands, the level difference due to the size difference between the first absorbent layer, the second absorbent layer and the absorbent polymer layer, particularly the widthwise end of the absorbent article having a large thickness among absorbent articles It is possible to make it difficult for the wearer to feel the level difference caused by Improvement of feeling is brought about.
- the absorbent article according to aspect 8A can exhibit the following effects.
- a portion located in the crotch portion of the top sheet is likely to enter the through hole or the recessed portion of the absorbent body by the force toward the inner side in the width direction applied when the absorbent article is worn.
- the liquid (for example, urine) supplied to the absorbent article is absorbed and swollen by the absorbent polymer layer of the liquid absorbent sheet, the swollen absorbent polymer layer functions as a pressure buffer layer, The part located on the back side is protected from pressure. Therefore, the shape of the convex part in the part located in the crotch part of the top sheet is easily maintained.
- a wearing article according to an aspect of the present invention includes a liquid-permeable top sheet having a mounting surface on which an absorbent article is mounted, and a liquid-impermeable back sheet.
- a worn article comprising: an exterior body having a side part, a crotch part, and a back side part; and an absorbent article according to any one of aspects 1 to 8, which is detachably attached to the attachment surface.
- the wearing article according to aspect 1B can exhibit the same effects as the absorbent article according to aspects 1A to 8A, depending on the aspect of the absorbent article to be mounted.
- the exterior body is a first leakage prevention portion that can stand up from the mounting surface, and is a fixed end fixed to the mounting surface.
- a first elastic member attached in a stretched state to the free end portion of the first leakproof portion, the first leakproof portion having a free end portion separable from the mounting portion and the mounting surface,
- the first elastic member having both end portions fixed to the mounting surface and the second leakage preventing portion that can stand up from the mounting surface, and can be separated from the fixed end portion fixed to the mounting surface and the mounting surface
- a second leak-proof portion having a free end and a second elastic member attached to the free end of the second leak-proof portion in a stretched state, wherein both ends in the stretch direction are fixed to the mounting surface
- the second elastic member, and the absorbent article is made up of the absorbent article.
- Both side portions in the width direction are arranged on the mounting surface so as to be positioned between the mounting surface and the first leakage preventing portion and between the mounting surface and the second leakage preventing portion, respectively.
- the said absorbent article is an absorbent article which concerns on aspect 7A or aspect 8A, and the maximum width of the said absorbent polymer layer is larger than the space
- the wearing article which concerns on aspect 2B can demonstrate the following effect.
- the absorbent polymer layer of the absorbent article absorbs the liquid and swells, the first leakage preventing portion and the second leakage preventing portion are pushed up in the standing direction. Therefore, the first leakage preventing portion and the second leakage preventing portion are unlikely to fall down, and the liquid leakage preventing effect by the first leakage preventing portion and the second leakage preventing portion is easily exhibited effectively.
- the type and application of the absorbent article of the present invention are not particularly limited.
- absorbent articles include sanitary products such as urine collection pads, disposable diapers, sanitary napkins, panty liners, etc., and these may be used for humans and non-human animals such as pets.
- the liquid to be absorbed by the absorbent article of the present invention is not particularly limited, and examples thereof include liquid excrement (for example, urine, watery stool, menstrual blood, etc.) of the wearer.
- FIG. 1 is a plan view of the urine collection pad 100
- FIG. 2 is an exploded perspective view of the urine collection pad 100
- FIG. 3 is an end view taken along line AA of FIG. 1
- FIG. 5 is a partially enlarged perspective view of the top sheet 120.
- the urine collecting pad 100 has a length direction X, a width direction Y, and a thickness direction Z orthogonal to each other in the extended state.
- the urine absorbing pad 100 is disposed between a liquid-permeable top sheet 120 having a skin-side surface 121, a liquid-impermeable back sheet 130 having a clothing-side surface 131, and the top sheet 120 and the back sheet 130.
- a liquid-absorbing absorber 140 is disposed between a liquid-permeable top sheet 120 having a skin-side surface 121, a liquid-impermeable back sheet 130 having a clothing-side surface 131, and the top sheet 120 and the back sheet 130.
- a liquid-absorbing absorber 140 is disposed between a liquid-permeable top sheet 120 having a skin-side surface 121, a liquid-impermeable back sheet 130 having a clothing-side surface 131, and the top sheet 120 and the back sheet 130.
- the urine collecting pad 100 has an abdominal side part 111, a crotch part 112, and a back side part 113 arranged in the length direction X.
- the abdomen 111 is applied to the wearer's abdomen
- the crotch 112 is applied to the wearer's crotch
- the back 113 is the wearer's buttocks and / or back.
- the length of the urine absorbing pad 100 is usually 350 to 880 mm, and the width is usually 160 to 460 mm.
- the urine removing pad 100 is worn such that the skin side surface 121 of the top sheet 120 is located on the wearer's skin side and the clothing side surface 131 of the back sheet 130 is located on the wearer's clothing side.
- the urine absorbing pad 100 is preferably worn in a state of being mounted on an exterior body 200 described later. Since the shape of the urine absorbing pad 100 in a plan view is a bowl shape with a substantially central portion in the length direction X being constricted, the constricted portion of the urine collecting pad 100 can easily fit between the wearer's crotch.
- the urine excreted from the wearer penetrates the absorber 140 through the top sheet 120 and is absorbed and held by the absorber 140. Leakage of urine absorbed and held by the absorber 140 is prevented by the back sheet 130.
- the liquid-permeable sheet used as the top sheet 120 is a nonwoven fabric.
- the nonwoven fabric include air-through nonwoven fabric, spunbond nonwoven fabric, point bond nonwoven fabric, spunlace nonwoven fabric, needle punch nonwoven fabric, melt blown nonwoven fabric, and combinations thereof (for example, spunbond / meltblown / spunbond (SMS) nonwoven fabric).
- SMS spunbond / meltblown / spunbond
- An air-through nonwoven fabric is preferable.
- the basis weight of the nonwoven fabric used as the top sheet 120 is appropriately adjusted in consideration of liquid permeability, touch and the like.
- the basis weight of the air-through nonwoven fabric is usually 20 to 40 g / m 2 , preferably 25 to 35 g / m 2 .
- a collar portion 122 (an example of a convex portion) is formed on the skin side surface 121 of the top sheet 120.
- the flanges 122 extend in the length direction X and are arranged at a predetermined interval in the width direction Y, and one groove 123 is formed between two adjacent flanges 122. That is, the skin-side surface 121 is formed with a ridge groove structure 124 including a plurality of ridges 122 extending in the length direction X and a plurality of grooves 123 extending in the length direction X.
- one flange 122 is shown as a region between two adjacent lines, and one groove 123 is shown by one line.
- a part of the ridge groove structure 124 formed on the skin side surface 121 is omitted in FIG. Further, since the BB line shown in FIG. 1 is a line passing through the flange 122, the groove 123 does not appear in the end view of the BB line (FIG. 4).
- the urine supplied to the top sheet 120 extends in the length direction X along the ridge portion 122 and the groove portion 123. It is advantageous in that it is easy to spread, and it is possible to prevent urine from spreading in the width direction Y and leakage of urine from the urine collecting pad 100 due to this.
- the form of the collar part 122 and the groove part 123 is changeable.
- the flange portion 122 and the groove portion 123 extend in the width direction Y and are aligned in the length direction X, and the flange portion 122 and the groove portion 123 extend while changing directions (for example, in a wavy shape).
- the embodiment in which the flange 122 and the groove 123 extend intermittently in the length direction X, and the like.
- the surface of the flange 122 is a curved surface, and the cross-sectional shape of the flange 122 is a substantially inverted U shape toward the surface.
- the cross-sectional shape of the flange 122 can be changed.
- embodiment whose cross-sectional shape of the collar part 122 is trapezoid shape, a triangular shape, etc. is mentioned, for example.
- the groove portion 123 is formed even when the collar portion 122 is crushed by the force applied to the urine collecting pad 100 (for example, body pressure of the wearer). This is advantageous in that it can maintain the space.
- the flange portion 122 has a thickness T1
- the groove portion 123 has a thickness T2.
- the thickness T1 of the flange 122 is usually 0.3 to 1.5 mm, preferably 0.6 to 1.4 mm, more preferably 0.8 to 1.2 mm
- the thickness T2 of the groove 123 is usually The thickness is 0.1 to 0.5 mm, preferably 0.2 to 0.4 mm, and more preferably 0.2 to 0.3 mm.
- the thickness of the buttock and groove is measured by measuring a 100 mm ⁇ 100 mm top sheet sample cut out from the urine collection pad and a laser displacement meter (for example, a high-precision two-dimensional laser displacement meter LJ-G series manufactured by Keyence Corporation (model: Using LJ-G030)) in a non-contact manner as follows.
- a top sheet sample is placed on a horizontal measuring table, and the displacement from the measuring table is measured with a laser displacement meter for five different collars, and the average value of the five measurements is defined as the thickness (mm) of the collar. .
- the displacement from a measurement stand is measured with a laser displacement meter, and let the average value of five measured values be the thickness (mm) of a groove part.
- the flange portion 122 has a width W1, and the groove portion 123 has a width W2.
- the width W1 of the flange 122 is usually 2.0 to 5.0 mm, preferably 3.0 to 4.0 mm, and the width W2 of the groove 123 is usually 1.0 to 3.0 mm, preferably 1.0. ⁇ 2.0 mm.
- the interval between the two adjacent flange portions 122 is usually equal to the width W2 of the groove portion, and the interval between the two adjacent groove portions 123 is usually equal to the width of the flange portion 122.
- the width W1 of the flange 122 is measured as a distance between the boundary lines of the flange 122 and the two groove portions 123 located on both sides thereof based on a plane photograph or a plane image of the top sheet 120 in a non-pressurized state.
- the width W2 of the groove 123 is the same.
- the thickness and width of the flange 122 are substantially the same in any flange, but there may be a flange having a thickness or width different from other flanges. The same applies to the thickness and width of the groove 122.
- the content ratio of the thickness direction oriented fibers in the ridge portion 122 is greater than the content ratio of the thickness direction oriented fibers in a portion of the nonwoven fabric other than the ridge portion 122 (for example, the groove portion 123). Larger is preferred.
- “Thickness-oriented fibers” are fibers that are oriented at an angle of +45 degrees to ⁇ 45 degrees with respect to the thickness direction Z.
- the content ratio of the thickness-oriented fibers in the collar portion 122 is preferably 55 to 100%, more preferably 60 to 100%.
- the difference between the content of the thickness-oriented fibers in the ridge portion 122 and the content of the thickness-oriented fibers in the portion of the nonwoven fabric other than the ridge portion 122 is preferably 10 to 100%, Preferably it is 20 to 100%.
- the measurement of the content rate of the thickness direction orientation fiber in the predetermined part of a nonwoven fabric is implemented as follows. (1) Cut the nonwoven fabric to produce a nonwoven fabric sample. (2) Using a digital microscope VHX-100 manufactured by Keyence Corporation, take an enlarged image from a direction perpendicular to the cut surface of the nonwoven fabric sample. The magnified image is an image magnified to a magnification that allows measurement of 50 or more fibers, and the magnification is, for example, 20 to 50 times. When taking an enlarged image, focus on the fiber nearest to the cut surface of the non-woven fabric sample (excluding fibers that have irregularly jumped forward), and set the shooting depth (depth). The enlarged image is created on the PC screen as a 3D image.
- a 3D image is converted into a 2D image, and a plurality of lines extending parallel to the thickness direction of the nonwoven fabric sample are drawn on the 2D image, and +45 degrees to -45 degrees with respect to the thickness direction of the nonwoven fabric sample.
- the number of fibers oriented at an angle of is counted.
- the ratio of the number of counted fibers to the number of all fibers in the measurement range is calculated.
- (1) to (4) are repeated several times (for example, 3 to 5 times), and the average value is taken as the content of the fiber in the thickness direction.
- the non-woven fabric in which the ridge groove structure 124 is formed is formed by, for example, forming a ridge groove structure on a web containing thermoplastic resin fibers, and then heat-treating the intersecting portions of the thermoplastic resin fibers in the web. Can be manufactured.
- heat processing are implemented by spraying a hot air with respect to a web.
- thermoplastic resin constituting the thermoplastic resin fiber contained in the web examples include polyolefin, polyester, polyamide, and the like.
- polyolefin examples include, for example, linear low density polyethylene (LLDPE), low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), polypropylene, polybutylene, and copolymers based on these (for example, Ethylene-vinyl acetate copolymer (EVA), ethylene-ethyl acrylate copolymer (EEA), ethylene-acrylic acid copolymer (EAA), ionomer resin) and the like.
- LLDPE linear low density polyethylene
- LDPE low density polyethylene
- MDPE medium density polyethylene
- HDPE high density polyethylene
- EVA Ethylene-vinyl acetate copolymer
- EAA ethylene-ethyl acrylate copolymer
- EAA ethylene-acrylic acid copolymer
- polyesters examples include linear or branched carbon atoms of up to 20 including polyethylene terephthalate (PET), polytrimethyl terephthalate (PTT), polybutylene terephthalate (PBT), polylactic acid, and polyglycolic acid. And polyesters such as polyhydroxyalkanoic acid, copolymers based on these, and copolymerized polyesters obtained by copolymerizing alkylene terephthalate as a main component with a small amount of other components.
- polyamide examples include 6-nylon and 6,6-nylon.
- the thermoplastic resin fiber is preferably subjected to a hydrophilic treatment.
- thermoplastic resin fiber examples include, for example, a treatment using a surfactant, a hydrophilic agent, etc. (for example, kneading a surfactant inside the fiber, coating a surfactant on the fiber surface, etc.) Plasma processing etc. are mentioned.
- a surfactant for example, kneading a surfactant inside the fiber, coating a surfactant on the fiber surface, etc.
- Plasma processing etc. are mentioned.
- the thermoplastic resin fiber may be composed of one kind of thermoplastic resin, but is preferably a composite fiber containing two or more kinds of thermoplastic resins.
- a preferable composite fiber is a core-sheath type composite fiber.
- the thermoplastic resin forming the sheath component of the core-sheath composite fiber a thermoplastic resin having a melting point lower than that of the thermoplastic resin forming the core component is selected.
- the core component of the sheath-core composite fiber and the thermoplastic resin forming the sheath component include olefin resins such as polyethylene and polypropylene, polyamide resins such as nylon, polyester resins, polyacrylonitrile resins, and the like. .
- the thermoplastic resin forming the sheath component is preferably polyethylene (for example, high density polyethylene, low density polyethylene, linear low density polyethylene, a mixture of these polyethylenes, etc.), and the thermoplastic resin forming the core component is Polypropylene and polyester are preferable.
- polyethylene for example, high density polyethylene, low density polyethylene, linear low density polyethylene, a mixture of these polyethylenes, etc.
- thermoplastic resin forming the core component is Polypropylene and polyester are preferable.
- Examples of the method for forming the groove structure on the web include the methods described in JP-A-2008-25079, JP-A-2008-23326, JP-A-2009-30218, and the like. According to these methods, the web is placed on a breathable support member (for example, a net-like support member), and the gas (usually air) is continuously formed on the upper surface of the web while moving the breathable support member in a predetermined direction. By injecting, a grooved structure can be formed on the web.
- the lower surface of the web has a shape along the shape of the breathable support member. For example, when the web placement surface of the net-like support member is flat, the lower surface of the web is substantially flat (therefore, the lower surface of the nonwoven fabric is also substantially flat).
- a groove portion extending in the moving direction of the air-permeable support member is formed in a region of the upper surface of the web where the gas is injected, and a flange portion is formed between two adjacent groove portions.
- region where gas was injected moves to the both sides of a groove part, the basic weight of a collar part becomes higher than the basic weight of a groove part normally.
- the fibers in the web are rolled up by the gas bounced back by colliding with a non-venting portion (for example, a wire) of the air-permeable support member, and the thickness direction orientation in the heel portion of the ridge groove structure formed on the web
- the content rate of the fiber becomes larger than the content rate of the thickness direction oriented fiber in the other portion (for example, the groove).
- the number of ribs and grooves, spacing, basis weight, fiber density, thickness-oriented fiber content, etc. are the number of nozzles, caliber and pitch, temperature and amount of gas injected from the nozzle, web tension, etc. It is possible to adjust to a desired range by adjusting.
- FIG. 12 and FIG. 13 are diagrams for explaining an embodiment of a nonwoven fabric manufacturing apparatus for manufacturing a nonwoven fabric in which the ridge groove structure 124 is formed.
- 12A is an overall view of the nonwoven fabric manufacturing apparatus 300
- FIG. 12B is an enlarged perspective view of the injection unit 330 of the nonwoven fabric manufacturing apparatus 300
- FIG. 13 is injected from the injection unit 330. It is a figure for demonstrating the effect
- the nonwoven fabric manufacturing apparatus 300 includes a gas-permeable support member 310 that supports the web W, a conveyor 320 that moves the gas-permeable support member 310 in a predetermined direction F, and a surface of the web W that is supported by the gas-permeable support member 310. And a heater unit 340 for heat-treating the web W after the gas injection process.
- the air-permeable support member 310 is a net-like support member formed by weaving a plurality of wires having a predetermined thickness that are impermeable portions.
- the breathable support member 310 is formed with a plurality of holes that are ventilation portions by weaving a plurality of wires at a predetermined interval. The hole vents the gas G injected from the injection unit 330 downward.
- the conveyor 320 includes a breathable belt portion 321 that supports the breathable support member 310 and rotating portions 322 and 323 that rotate the breathable belt portion 321 in a predetermined direction.
- the injection unit 330 is connected to an air supply unit (not shown) through an air supply pipe 331 so as to allow ventilation.
- a plurality of injection ports 332 are formed in the injection unit 330 at predetermined intervals.
- the gas G supplied from the air supply unit (not shown) to the injection unit 330 through the air supply pipe 331 is supplied from the plurality of injection ports 332 formed in the injection unit 330 to the web W supported by the air-permeable support member 310.
- the gas G that has passed through the air-permeable support member 310 is sucked by the air intake unit 350 disposed below the injection unit 330.
- the gas G injected from the injection port 332 collides with the air-impermeable portion (wire) of the air-permeable support member 310 and bounces back, so that the fibers in the web W are rolled up and the orientation of the web W in the thickness direction is increased. It improves (refer FIG. 13). Thereby, the content rate of the thickness direction orientation fiber in a collar part becomes larger than the content rate of the thickness direction orientation fiber in a groove part among the groove structure formed in the web W. As shown in FIG.
- the temperature of the gas G injected from the injection port 332 may be normal temperature, but from the viewpoint of improving the moldability of the groove structure, it is equal to or higher than the softening point of the thermoplastic resin fibers constituting the web W,
- the melting point is preferably in the range of + 50 ° C. to ⁇ 50 ° C.
- the web W supported by the air-permeable support member 310 is heated by the heater unit 340 after the gas injection process.
- the web W supported by the air-permeable support member 310 continuously moves in a heating space formed in the heater portion 340 with a stay for a predetermined time.
- the intersecting portion of the thermoplastic resin fibers in the web W is heat-sealed in a state where the groove structure formed in the web W is held, and the groove structure 124 is formed.
- a non-woven fabric is produced.
- the collar part 122 (projection ridge part extended in the length direction X) in this embodiment is an example of a convex part, and the form of the convex part formed in the skin side surface 121 of the top sheet 120 can be changed. .
- the nonwoven fabric which has the skin side surface in which many convex parts scattered are used as the top sheet 120 is mentioned, for example.
- the thickness of the portion where the convex portions are formed is not formed.
- the thickness of the part (concave part) (distance from the lower surface of the nonwoven fabric to the deepest part of the concave part), the pitch of the convex part (distance between the tops of two adjacent convex parts), etc.
- a method for producing a nonwoven fabric having a skin-side surface on which a large number of interspersed projections are formed a method using gear stretching, heat stretching of heat stretchable fibers and / or heat shrinking of heat shrinkable fibers is used. And the like.
- the content ratio of the thickness direction-oriented fibers in the ridge portion of the ridge groove structure formed in the nonwoven fabric is It is considered that the content of the fiber in the thickness direction in other portions (for example, the groove portion) becomes larger.
- the heat-extensible fiber layer is provided on the skin side and partially joined to the heat-extensible fiber layer by the joint portion.
- the heat-extensible fiber layer is raised on the skin side by heat expansion of the heat-extensible fiber layer and heat contraction of the heat-shrinkable fiber layer.
- a heat-shrinkable fiber layer having a non-heat-shrinkable fiber layer on the skin side and partially joined to the non-heat-shrinkable fiber layer by the joint portion A non-woven fabric having a skin-side surface on which a large number of convex portions are formed by heat-treating a laminated sheet having a heat-shrinkable fiber layer on the clothing side and causing the non-heat-shrinkable fiber layer to rise to the skin side by heat shrinkage of the heat-shrinkable fiber layer.
- a non-heat-extensible fiber layer having a heat-extensible fiber layer on the skin side and partially joined to the heat-extensible fiber layer by a joint portion is used.
- Fabricate a non-woven fabric having a skin-side surface on which a large number of protrusions are formed by heat-treating the laminated sheet on the clothing side and raising the heat-extensible fiber layer to the skin side by heat extension of the heat-extensible fiber layer The method of doing is mentioned.
- liquid-impermeable sheet used as the back sheet 130 examples include, for example, a waterproof nonwoven fabric (for example, a point bond nonwoven fabric, a spun bond nonwoven fabric, a spun lace nonwoven fabric), a synthetic resin (for example, polyethylene, polypropylene, polyethylene). Terephthalate, etc.) film, composite sheet of non-woven fabric and synthetic resin film, and the like.
- the thickness, basis weight, and the like of the back sheet 130 are appropriately adjusted in consideration of liquid impermeability and the like.
- the back sheet 130 preferably has air permeability or moisture permeability in addition to liquid impermeability in order to reduce stuffiness when worn.
- the absorbent body 140 is disposed between the top sheet 120 and the back sheet 130 and extends from the abdominal side part 111 to the back side part 113 through the crotch part 112.
- the absorber 140 has a first absorption layer 140a and a second absorption layer 140b.
- the number of layers included in the absorber 140 can be changed. Examples of the modification include an embodiment in which the absorber 140 is formed of a single layer, an embodiment in which the absorber 140 has one or more layers other than the first absorption layer 140a and the second absorption layer 140b.
- the 1st absorption layer 140a and the 2nd absorption layer 140b of absorber 140 contain the absorptive material which can absorb urine excreted from a wearer.
- the absorbent material include hydrophilic fibers and absorbent polymers.
- the hydrophilic fiber include wood pulp; non-wood pulp; regenerated cellulose such as rayon and fibril rayon; semi-synthetic cellulose such as acetate and triacetate.
- the absorbent polymer include polyacrylate, polysulfonate, maleate anhydride, polyacrylamide, polyvinyl alcohol, and polyethylene oxide superabsorbent polymers (Super Absorbent Polymer (SAP)). Can be mentioned.
- the planar view shape of the first absorbent layer 140a is a bowl shape with a substantially central portion in the length direction
- the planar view shape of the second absorbent layer 140b is a substantially rectangular shape.
- the thickness, basis weight, and the like of the first absorbent layer 140a and the second absorbent layer 140b are appropriately adjusted in consideration of the liquid absorbency of the absorbent body 140 and the like.
- the thickness of the first absorbent layer 140a is usually 1.5 to 5.0 mm, preferably 2.5 to 3.5 mm, and the basis weight is usually 150 to 400 g / m 2 , preferably 200 to 300 g / m. 2 .
- the thickness of the second absorbent layer 140b is usually 1.5 to 5.0 mm, preferably 2.5 to 3.5 mm, and the basis weight is usually 150 to 400 g / m 2 , preferably 200 to 300 g / m. 2 .
- the thickness of the absorber is measured by measuring a 100 mm ⁇ 100 mm absorber sample cut out from a urine absorption pad and a commercially available thickness measuring instrument (for example, PE257 manufactured by PEACOCK, measuring surface 50 mm (diameter), measuring pressure 3 g. / Cm 2 ) and is carried out as follows. Using a thickness meter, pressurize five different parts of the absorber sample at a constant pressure of 3 g / cm 2 , measure the thickness after 10 seconds of pressurization at each part, and calculate the average of the five measured values as thickness (mm) And
- the maximum width of the second absorbent layer 140b located closer to the back sheet 130 than the first absorbent layer 140a is smaller than the minimum width of the first absorbent layer 140a. That is, the absorber 140 is formed by a high basis weight portion formed by a portion where the first absorption layer 140a and the second absorption layer 140b overlap, and a portion of the first absorption layer 140a that does not overlap the second absorption layer 140b. And the low basis weight portion extends in the length direction X.
- the high basis weight and the low basis weight mean the relative basis weight. However, the widths of the first absorption layer 140a and the second absorption layer 140b can be changed.
- the wearer is different in size between the first absorbent layer 140a and the second absorbent layer 140b. It is difficult to feel the level difference due to the urine, and the feeling of wearing the urine collecting pad 1 improves.
- the positional relationship between the first absorption layer 140a and the second absorption layer 140b can be changed. Examples of the change include an embodiment in which the second absorbent layer 140b is positioned closer to the top sheet 120 than the first absorbent layer 140a.
- the first absorption layer 140a and the second absorption layer 140b may be covered with a core wrap.
- the first absorbent layer 140a and the second absorbent layer 140b can be prevented from collapsing by covering the first absorbent layer 140a and the second absorbent layer 140b, which are layered molded articles of absorbent material, with a core wrap.
- a liquid-permeable sheet used as a core wrap a nonwoven fabric etc. are mentioned, for example.
- a through hole 141a is formed in the first absorbent layer 140a so as to penetrate the first absorbent layer 140a in the thickness direction Z.
- the second absorbent layer 140b penetrates the second absorbent layer 140b in the thickness direction Z.
- a through-hole 141b is formed.
- the through holes 141 a and 141 b are located in the crotch portion 112 of the urine absorbing pad 100 and extend in the length direction X through the center in the width direction Y of the absorbent body 140.
- the first absorption layer 140a and the second absorption layer 140b are stacked so that the positions of the through holes 141a and 141b coincide (that is, the through holes 141a and 141b communicate with each other).
- the absorber 140 is formed with the through holes 141a and 141b that penetrate the absorber 140 in the thickness direction Z.
- the through hole 141 is located in the crotch portion 112 of the urine collecting pad 100 and extends in the length direction X through the center in the width direction Y of the absorbent body 140, like the through holes 141a and 141b. .
- the position of the through-hole 141 tends to coincide with the position of the wearer's genital area (urine excretion opening), and the fit of the urine collecting pad 100 to the wearer is improved.
- mouth) contacts becomes difficult to become a moist state, a wearer's discomfort is prevented.
- a recess that opens to the top sheet 120 side may be formed instead of the through hole 141.
- the absorber having a recess opening on the top sheet 120 side can be formed, for example, by laminating a first layer having a through hole 141a and a second layer having no through hole 141b.
- the lengths, widths, and the like of the through holes 141a, 141b are appropriately adjusted in consideration of the sizes of the first absorption layer 140a and the second absorption layer 140b.
- the width of the through hole 141a is usually 5.0 to 50 mm, preferably 10 to 20 mm.
- the width of the through hole 141b is equal to or smaller than the width of the through hole 141a, and is usually 5.0 to 40 mm, preferably 10 to 15 mm.
- the length of the through hole 141a is usually 50 to 300 mm, preferably 50 to 200 mm, and more preferably 50 to 150 mm.
- the length of the through hole 141b is equal to or shorter than the length of the through hole 141a, and is usually 30 to 250 mm, preferably 30 to 150 mm.
- the width and length of the through-hole 141a being equal to or greater than the width and length of the through-hole 141b, some deviation occurred in the step of laminating the first absorption layer 140a and the second absorption layer 140b. Even so, the size of the through hole 141 viewed from the surface of the absorber 140 on the top sheet 120 side is kept substantially constant. Further, a step is generated on the inner wall surface of the through hole 141 and the inner surface area of the through hole 141 is increased, so that the urine absorbability of the absorbent body 140 in the portion where the through hole 141 is formed is improved.
- compressed parts 142 and 143 that integrate the absorbent body 140 in the thickness direction Z are formed on the outer side (both sides) of the through hole 141 in the width direction Y.
- the pressing parts 142 and 143 integrate the first absorbent layer 140a and the second absorbent layer 140b in the thickness direction Z.
- the compressed parts 142 and 143 extend in the length direction X at the crotch part 112.
- the pressing parts 142 and 143 are concave parts that are formed by heat embossing and open to the top sheet 120 side.
- the urine removing pad 100 further includes a liquid absorbent sheet 160 disposed between the top sheet 120 and the absorber 140.
- the liquid absorbent sheet 160 is arranged in a region from the crotch portion 112 to the back side portion 113 so as not to overlap the through hole 141 in the thickness direction Z.
- the liquid absorbent sheet 160 includes liquid permeable sheets 161 and 162 and an absorbent polymer layer 163 disposed between the liquid permeable sheets 161 and 162.
- the liquid permeable sheets 161 and 162 are, for example, nonwoven fabrics. As a nonwoven fabric, the same specific example as the top sheet 120 is mentioned.
- Specific examples of the absorbent polymer contained in the absorbent polymer layer 163 are the same as those of the absorber 140.
- the basis weight of the absorbent polymer 163 layer is appropriately adjusted in consideration of the urine absorption amount required for the urine absorption pad 100 and the like.
- the liquid-permeable sheets 161 and 162 have a size of 180 mm ⁇ 130 mm, absorption of approximately the same size as the liquid-permeable sheets 161 and 162 using the absorbent polymer 2 g that absorbs 60 g of physiological saline per 1 g
- the conductive polymer layer 163 can be formed.
- Absorbent polymer layer 163 has a maximum width D 1.
- the maximum width D 1 is the outermost point on one side in the width direction Y among the points on the contour line of the absorbent polymer layer 163 in the plane perpendicular to the thickness direction Z on which the absorbent polymer layer 163 is projected. This is a distance between a virtual straight line extending in the length direction X through the point and a virtual straight line extending in the length direction X through a point on the outermost side on the other side in the width direction Y.
- the width of the absorbent polymer layer 163 is substantially constant.
- the absorbent polymer layer 163 is fixed between the liquid-permeable sheets 161 and 162 with an adhesive (for example, hot melt adhesive) applied to at least one surface of the liquid-permeable sheets 161 and 162. .
- an adhesive for example, hot melt adhesive
- the adhesive is not applied to the entire interface of the liquid permeable sheets 161 and 162. For example, dots, spirals, stripes, etc. Painted with a pattern.
- the absorbent polymer layer 163 may be divided into a plurality of regions by an absorbent polymer absence region extending in an arbitrary direction.
- the urine absorption pad 100 can exhibit the following effects.
- the skin-side surface 121 of the top sheet 120 is folded on a part other than the heel part 122 (for example, the groove part 123) by the force toward the inner side in the width direction Y applied at the time of wearing the urine collecting pad 100. 130 side), the absorbent body 140 has a through-hole 141, a portion of the first absorbent layer 140a that does not overlap the second absorbent layer 140b (low basis weight portion), and the compressed portions 141, 142. It tends to be convexly deformed to the skin side (top sheet 120 side) as a fold starting point. Therefore, when the urine absorbing pad 100 is worn, the top sheet 120 easily enters the through hole 141 of the absorber 140.
- the through hole 141 is located in the crotch portion 112
- a portion of the top sheet 120 located in the crotch portion 112 is likely to enter the through hole 141 of the absorber 140.
- the portion of the top sheet 120 that has entered the through hole 141 of the absorber 140 is difficult to be pressed, and the shape of the flange 122 in this portion is Easy to maintain.
- Urine of elderly people contains more impurities than urine of general adults. Therefore, when the ridge 122 is crushed by the pressing of the top sheet 120 and the bulk and voids of the ridge 122 are reduced, impurities in the urine are likely to remain in the top sheet 120, and the liquid permeability of the top sheet 120 is reduced. cause.
- the urine collection pad 100 is suitable as a urine collection pad for absorbing the urine of an elderly person (especially a bedridden elderly person) because the bulk and voids of the collar 122 are easily maintained.
- the urine collection pad 100 is particularly suitable as an absorbent article (for example, a urine collection pad) for absorbing urine of an elderly person (especially a bedridden elderly person).
- the swollen absorbent polymer layer 163 functions as a pressure buffer layer, and protects the portion of the top sheet 120 that does not overlap the absorbent polymer layer 163 in the thickness direction Z from pressure.
- the liquid absorbent sheet 160 is disposed so as not to overlap the through hole 141 in the thickness direction Z, a portion of the top sheet 120 that overlaps the through hole 141 in the thickness direction Z is protected from pressure. For this reason, the part which overlaps with the through-hole 141 in the thickness direction Z among the top sheets 120 is hard to be pressed, and the shape of the collar part 122 in this part is easy to be maintained.
- FIGS. 6 is a plan view of the exterior body 200
- FIG. 7 is an exploded perspective view of the exterior body 200
- FIG. 8 is a perspective view of the exterior body 200 transformed into a pants shape
- FIG. It is a figure for demonstrating the side seat
- the exterior body 200 has a length direction X, a width direction Y, and a thickness direction Z that are orthogonal to each other in the extended state.
- the length direction X, the width direction Y, and the thickness direction Z of the exterior body 200 coincide with the length direction X, the width direction Y, and the thickness direction Z of the urine collecting pad 100.
- the exterior body 200 includes a main body portion 210 having both end edges 201 and 202 in the length direction X and both end edges 203 and 204 in the width direction Y, and both end edges 203 and 204 in the width direction Y of the main body portion 210 in the width direction Y.
- Side flap sheets 280a and 280b extending.
- the main body 210 has an abdominal side part 211, a crotch part 212, and a back side part 213 arranged in the length direction X.
- the ventral part 211 is a part applied to the wearer's abdomen
- the crotch part 212 is a part applied to the wearer's crotch part
- the back side part 213 is a part applied to the wearer's buttocks and / or back part. It is.
- the length of the main body 210 is usually 650 to 1000 mm, and the width is usually 300 to 690 mm.
- the pair of side flap sheets 280 a and 280 b are provided on both sides of the back side part 213 of the main body part 210.
- the hook portions 281a and 281b of the mechanical fastener which is the engaging means attached to the side flap sheets 280a and 280b, engage both end edges in the width direction Y of the ventral side portion 211 and both end edges in the width direction Y of the back side portion 213.
- the exterior body 200 is formed in a pants shape
- the waist opening is formed by both end edges 201 and 202 in the length direction X of the main body 210, and both end edges 213 in the width direction Y of the main body 210.
- 214 form a leg opening (see FIG. 8).
- the exterior body 200 can be deformed from the unfolded type to the pant type, but may be formed into the pant type from the beginning.
- the exterior body 200 can be formed into a pants shape by joining both end edges in the width direction Y of the crotch part 212 and both end edges in the width direction Y of the back side part 213.
- the pair of side flap sheets 280a and 280b can be omitted.
- the main body 210 has a bowl shape in which a substantially central portion in the length direction X (a portion corresponding to the crotch portion 212) is constricted. For this reason, the crotch part 212 is easy to fit a wearer's crotch. However, the shape of the main body 210 can be changed as appropriate within a range that can be transformed into a pants shape.
- the main body 210 includes a liquid-permeable top sheet 220 having a skin-side surface 221, a liquid-impermeable back sheet 230 having a clothing-side surface 231, and a liquid absorption disposed between the top sheet 220 and the back sheet 230.
- the absorber 240 can be omitted.
- the liquid-permeable sheet used as the top sheet 220 is, for example, a nonwoven fabric.
- a nonwoven fabric the same specific example as the top sheet 120 is mentioned.
- the basis weight, thickness, and the like of the top sheet 220 are appropriately adjusted in consideration of liquid permeability, touch, and the like.
- the back sheet 230 has a liquid-impermeable sheet 231 located on the skin side and a liquid-impermeable sheet 232 located on the clothing side.
- the liquid-impermeable sheets 231 and 232 include a waterproof nonwoven fabric, a synthetic resin film, a composite sheet of a nonwoven fabric and a synthetic resin film, and the like.
- the thickness, basis weight, and the like of the back sheet 230 are appropriately adjusted in consideration of liquid impermeability and the like.
- the back sheet 230 preferably has air permeability or moisture permeability in addition to liquid impermeability in order to reduce stuffiness when worn.
- the absorbent body 240 is disposed between the top sheet 200 and the back sheet 300 and extends from the abdominal side part 211 to the back side part 213 through the crotch part 212.
- the shape of the absorber 240 in plan view is a bowl shape in which the approximate center in the length direction X is constricted. Thereby, the narrow part of the absorber 240 becomes easy to fit a wearer's crotch.
- the absorber 240 contains an absorptive material that can absorb urine excreted from the wearer. As an absorptive material, the same specific example as the absorber 140 is mentioned.
- the absorber 240 may be covered with a core wrap.
- the thickness, basis weight, and the like of the absorber 240 are appropriately adjusted in consideration of liquid absorbency and the like.
- the thickness of the absorber 240 is usually 3 to 10 mm, preferably 4 to 7 mm, 150 to 500 g / m 2 , preferably 200 to 400 g / m 2 .
- the through-hole 241 which penetrates the absorber 240 in the thickness direction Z is formed in the absorber 240.
- the through hole 241 is located in the crotch portion 212 of the exterior body 200 and extends in the length direction X through the center in the width direction Y of the absorber 240. For this reason, when the urine collecting pad 100 is attached to the exterior body 200, the position of the through hole 141 of the urine collection pad 100 can be easily matched with the position of the through hole 241 of the exterior body 200.
- a recess that opens to the top sheet 220 side may be formed instead of the through hole 241.
- the absorber having a recess opening on the top sheet 220 side can be formed, for example, by laminating a first layer having a through hole 241 and a second layer having no through hole.
- the length, width, and the like of the through hole 241 are appropriately adjusted in consideration of the size of the absorber 240 and the like.
- the width of the through hole 241 is equal to or wider than the width of the through hole 141, and is usually 5 to 50 mm, preferably 15 to 25 mm.
- the length of the through hole 241 is equal to or longer than the length of the through hole 141, and is usually 50 to 700 mm, preferably 90 to 350 mm. Since the width and length of the through-hole 241 are equal to or larger than the width and length of the through-hole 141, the position of the through-hole 141 of the urine collection pad 100 when the urine collection pad 100 is attached to the exterior body 200. Is easily matched with the position of the through hole 241 of the exterior body 200.
- liquid-impervious sheet used as the side sheets 250a and 250b examples include, for example, a waterproof nonwoven fabric (for example, a point bond nonwoven fabric, a spun bond nonwoven fabric, a spun lace nonwoven fabric), and a synthetic resin (for example, polyethylene, polypropylene). , Polyethylene terephthalate, etc.) films, composite sheets of nonwoven fabric and synthetic resin film, and the like.
- the thickness, basis weight and the like of the side sheets 250a and 250b are appropriately adjusted in consideration of liquid impermeability and the like.
- the side sheet 250a has both end edges 251a and 252a in the length direction X and both end edges 253a and 254a in the width direction Y
- the side sheet 250b has both end edges 251b and 252b in the length direction X and both ends in the width direction Y. It has edges 253b and 254b.
- the side sheets 250a and 250b have leak-proof portions 255a and 255b as a part thereof.
- the leak-proof portion 255a has both end edges 256a and 257a in the length direction X and both end edges 258a and 259a in the width direction Y
- the leak-proof portion 255b has both end portions 256b and 257b in the length direction X and the width direction Y.
- Edges 253a and 253b of the side sheets 250a and 250b pass through the center in the width direction Y of the skin side surface 221 of the top sheet 220 and end edges 254a and 254b with respect to a virtual center line extending in the length direction X. More proximal.
- the edges 253a and 253b of the side sheets 250a and 250b may be referred to as proximal edges, and the edges 254a and 254b may be referred to as distal edges.
- the end edges 258a and 258b of the leakage preventing portions 255a and 255b may be referred to as proximal end edges, and the end edges 259a and 259b may be referred to as distal end edges.
- the leak-proof portions 255a and 255b are formed in a region overlapping the top sheet 220 in the thickness direction Z of the side sheets 250a and 250b, and the proximal ends 258a and 258b of the leak-proof portions 255a and 255b It coincides with the proximal edges 253a, 253b of the sheets 250a, 250b.
- the leakage preventing portions 255a and 255b are not fixed to the skin side surface 221 of the top sheet 220, but other than the leakage preventing portions 255a and 255b. This part is fixed to the skin side surface 221 of the top sheet 220.
- both end edges and distal end edges 259a, 259b in the length direction X of the leak-proof portions 255a, 255b are fixed ends fixed to the skin-side surface 221 of the top sheet 220, while the leak-proof portions
- the proximal end edges 258 a and 258 b of 250 a and 250 b are not fixed to the skin side surface 221 of the top sheet 220, and are free ends that can be separated from the skin side surface 221 of the top sheet 220.
- Examples of the bonding mode between the side sheets 250a and 250b and the top sheet 220 include bonding with a hot-melt adhesive.
- the side sheets 250a and 250b include first sheet portions S21a and S21b extending in the width direction Y from the distal end edges 254a and 254b to the proximal end edges 253a and 253b, and the top sheet 220 at the proximal end edges 253a and 253b. And second sheet portions S22a and S22b which are folded back and joined to the first sheet portions S21a and S21b.
- An elastic member 270a extending in the length direction X along the proximal end edge 253a is attached between the first sheet portion S21a and the second sheet portion S22a of the side seat 250a so as to be contractible in an extended state.
- An elastic member 270b extending in the length direction X along the proximal end edge 253b is attached between the first sheet portion S21b and the second sheet portion S22b of the side seat 250b so as to be contractible in an extended state. Yes.
- the extension direction of the elastic members 270a and 270b is substantially coincident with the length direction X.
- Both end portions 271a and 272a in the length direction X (extension direction) of the elastic member 270a extend in the length direction X beyond both end edges 256a and 257a in the length direction X of the leak-proof portion 255a, and are elastic.
- Both end edges 271b and 272b in the length direction X (extension direction) of the member 270b extend in the length direction X beyond both end edges 256b and 257b in the length direction X of the leak-proof portion 255b. Then, both end edges 271a and 272a in the length direction X (extension direction) of the elastic member 270a are fixed to the top sheet 220 while being sandwiched between the first sheet portion S21a and the second sheet portion S22a, Both ends 271b and 272b in the length direction X (extension direction) of the elastic member 270b are fixed to the top sheet 220 in a state of being sandwiched between the first sheet portion S21b and the second sheet portion S22b.
- the leak-proof parts 255a and 255b can stand up from the skin side surface 221 of the top sheet 220 by the contraction force of the elastic members 270a and 270b.
- a three-dimensional gather portion is formed.
- the leak-proof portions 255a and 255b stand up, the distal end edges 259a and 259b become the base, and the proximal end edges 258a and 258b are separated from the skin-side surface 221 of the top sheet 220 toward the wearer's skin side.
- Examples of the elastic members 270a and 270b include thread rubber and flat rubber.
- the skin side surface 221 of the top sheet 220 serves as a mounting surface for mounting the urine collecting pad 100.
- the urine absorbing pad 100 can be detachably attached to the skin side surface 221 of the top sheet 220.
- FIG. 10 is a partially enlarged plan view of the wearing article 500
- FIG. 11 is a cross-sectional view taken along line AA of FIG.
- the wearing article 500 includes an exterior body 200 and a urine removing pad 100 that is detachably attached to the attachment surface of the exterior body 200 (skin-side surface 221 of the top sheet 220).
- the urine collecting pad 100 is so packaged that both side portions of the urine collecting pad 100 in the width direction Y are located between the mounting surface of the exterior body 200 (skin-side surface 221 of the top sheet 220) and the leak-proof portions 225a and 255b. It is arranged on the mounting surface of the body 200.
- the ridge groove structure 124 formed on the top sheet 120 of the urine collection pad 100 serves as a mark, and the length direction X of the urine collection pad 100 and the length direction X of the exterior body 200 Easy to align with.
- the maximum width D 1 of the absorbent polymer layer 163 of the urine absorbing pad 100 is larger than the distance D 2 between the elastic member 270a and the elastic member 270b.
- Both end edges in the length direction X of the leak preventive portions 255 a and 255 b substantially coincide with both end edges in the length direction of the urine collecting pad 100. Therefore, the three-dimensional gathered portion formed by the standing of the leak-proofing portions 255a and 255b is not easily collapsed, and the effect of preventing urine leakage by the three-dimensional gathered portion is effectively exhibited.
- the through hole 141 formed in the absorbent body 140 of the urine collecting pad 100 overlaps with the through hole 241 formed in the absorbent body 240 of the exterior body 200 in the thickness direction Z. Therefore, even if the top sheet 120 is pressed when the wearing article 500 is worn, the portion of the top sheet 120 that has entered the through hole 141 of the absorber 140 is difficult to be pressed, and the shape of the flange 122 in this portion is maintained. Cheap.
- Example 1 Production of web A web which is a laminate of the first layer and the second layer was produced.
- a fiber coated with a concentric core-sheath type composite fiber A having polyethylene terephthalate as a core component and polyethylene as a sheath component with a durable hydrophilic oil agent was used as the fiber constituting the first layer.
- the average fineness of the fiber A is 2.2 dtex, and the average fiber length is 45 mm.
- fibers constituting the second layer polyethylene terephthalate as a core component, and a concentric core-sheath type composite fiber B having polyethylene as a sheath component coated with an initial hydrophilic hydrophilic oil agent, and polyethylene terephthalate as a core component
- a mixture (mass ratio 1: 1) with an eccentric core-sheath type composite fiber B containing polyethylene as a sheath component and coated with a durable hydrophilic oil agent was used.
- the average fineness of the fiber B is 3.3 dtex, and the average fiber length is 38 mm.
- the average fineness of the fiber C is 2.2 dtex, and the average fiber length is 44 mm.
- the web which is a laminated body of the 1st layer (basis weight: 20 g / m ⁇ 2 >) and the 2nd layer (basis weight: 10 g / m ⁇ 2 >) was manufactured with the card machine of speed 20m / min.
- the gas injection process is performed on the surface of the first layer.
- a fiber prepared by coating a concentric core-sheath type composite fiber F having polyethylene terephthalate as a core component and polyethylene as a sheath component with an initial hydrophilic hydrophilic oil agent was used as the fiber constituting the second layer.
- the average fineness of the fiber F is 2.8 dtex, and the average fiber length is 44 mm.
- the web which is a laminated body of the 1st layer (basis weight: 10 g / m ⁇ 2 >) and the 2nd layer (basis weight: 20 g / m ⁇ 2 >) was manufactured with the card machine of speed 20m / min.
- a nonwoven fabric was produced using the web produced in (1) above in the same manner as in Example 1 except that the gas injection treatment by the injection unit 330 was not performed.
- Example 1 The non-woven fabrics produced in Example 1 and Comparative Example 1 were measured for dry thickness and wet thickness.
- the method for measuring the dry thickness and wet thickness of the nonwoven fabric is as described above.
- the nonwoven fabric produced in Example 1 had a dry thickness of 0.86 mm and a wet thickness of 0.79 mm. The wet thickness corresponded to 91% of the dry thickness.
- the nonwoven fabric produced in Comparative Example 1 had a dry thickness of 0.78 mm and a wet thickness of 0.62 mm. The wet thickness corresponded to 80% of the dry thickness.
- Test Example 2 Measurement of urine absorption time A commercially available urine absorbing pad (comparative product) in which no ridge groove structure is formed on the skin side surface of the top sheet and the non-woven fabric manufactured in Production Example 1 were used as the top sheet. Except for the points, the urine absorption time was measured using a urine absorption pad (product of the present invention) having the same structure as the comparative product. Urine samples A, B and C collected from bedridden elderly people A, B and C were used as urine samples.
- a cylinder with a diameter of 60 mm was placed on the urine collection pad, and 80 mL of the urine sample was injected into the cylinder at an injection rate of 10 mL / second. After the start of injection, the time until the urine staying in the cylinder disappeared was measured, and this was defined as the first urine absorption time (seconds).
- the absorption times of the first, second, and third times of general adult urine were 10 seconds, 16 seconds, and 23 seconds, whereas the first time of urine sample A, 2
- the first and third absorption times are 10 seconds, 31 seconds and 72 seconds, respectively
- the first, second and third absorption times of urine sample B are 10 seconds, 34 seconds and 125 seconds, respectively.
- the first, second and third absorption times for C were 15 seconds, 57 seconds and 153 seconds, respectively.
- the first, second and third absorption times of urine sample A are 8 seconds, 17 seconds and 26 seconds, respectively, and first time and second time of urine sample B.
- the absorption times for the first and third times were 9 seconds, 20 seconds and 40 seconds, respectively, and the absorption times for the first, second and third times of the urine sample C were 10 seconds, 32 seconds and 59 seconds, respectively.
- the urine absorption time was significantly reduced.
- Urine collection pad 200 Exterior body 111,211 Abdominal side part 112,212 Crotch part 113,213 Back side part 120,220 Liquid-permeable top sheet 121,220 Skin side surface 122 top sheet (an example of convex part) 123 Groove (an example of a recess) 124 Groove structure (an example of uneven structure) 130,230 Liquid impervious back sheet 140,240 Absorber 140a First layer 140b Second layer 141 Through hole 141a First layer through hole 141b Second layer through hole 142,143 Squeeze part 160 Liquid absorbing sheet 163 Absorbent polymer layer 250a, 250b Side sheet 255a, 255b Leakproof part
Abstract
Description
また、本発明は、吸収性物品が装着される装着面を有する透液性のトップシートと、不透液性のバックシートとを備え、腹側部、股間部及び背側部を有する外装体と、前記外装体の前記肌側表面に脱着可能に装着された本発明の吸収性物品とを備える、着用物品を提供する。
本発明の一態様(以下「態様1A」という)に係る吸収性物品は、透液性のトップシートと、不透液性のバックシートと、前記トップシート及び前記バックシートの間に配置された吸液性の吸収体とを備え、互いに直交する長さ方向、幅方向及び厚さ方向を有する吸収性物品であって、前記トップシートは、凸部が形成された肌側表面を有する不織布であり、前記吸収体は、前記吸収体を前記厚さ方向に貫通する貫通孔又は前記トップシート側に開口する凹部を有する、前記吸収性物品である。
本発明の一態様(以下「態様1B」という)に係る着用物品は、吸収性物品が装着される装着面を有する透液性のトップシートと、不透液性のバックシートとを備え、腹側部、股間部及び背側部を有する外装体と、前記装着面に脱着可能に装着された、態様1~態様8のいずれかに係る吸収性物品とを備える、着用物品である。
(1)不織布を切断し、不織布サンプルを作製する。
(2)株式会社キーエンス製のデジタルマイクロスコープVHX-100を使用して、不織布サンプルの切断面に対して垂直の方向からの拡大画像を撮影する。拡大画像は、50本以上の繊維の測定が可能となるような倍率に拡大された画像であり、拡大倍率は、例えば20~50倍である。拡大画像の撮影の際、不織布サンプルの切断面の最も手前の繊維(イレギュラーに手前に飛び出した繊維を除く)にピントを合わせ、撮影深度(奥行き)を設定する。拡大画像は、3D画像としてPC画面上に作成される。
(3)3D画像を2D画像に変換し、2D画像上に、不織布サンプルの厚さ方向に平行に延在する複数の線を引き、不織布サンプルの厚さ方向に対して+45度~-45度の角度で配向する繊維の本数をカウントする。
(4)カウントした繊維の本数の、測定範囲内の全繊維の本数に対する割合を計算する。
(5)(1)~(4)を数回(例えば3~5回)繰り返し、その平均値を厚さ方向配向繊維の含有率とする。
尿取りパッド100の着用時に加えられる幅方向Yの内側に向かう力によって、トップシート120の肌側表面121は、畝部122以外の部分(例えば、溝部123)を折れ起点として着衣側(バックシート130側)に向けて凸状変形しやすい一方、吸収体140は貫通孔141、第1吸収層140aのうち第2吸収層140bと重ならない部分(低坪量部分)及び圧搾部141,142を折れ起点として肌側(トップシート120側)に凸状変形しやすい。したがって、尿取りパッド100の着用時、トップシート120は吸収体140の貫通孔141内に入り込みやすい。特に、貫通孔141は股間部112に位置するので、トップシート120のうち股間部112に位置する部分が吸収体140の貫通孔141内に入り込みやすい。このため、尿取りパッド100の着用時にトップシート120が押圧されても、トップシート120のうち吸収体140の貫通孔141内に入り込んだ部分は押圧されにくく、この部分における畝部122の形状が維持されやすい。
(1)ウェブの製造
第1層及び第2層の積層体であるウェブを製造した。
第1層を構成する繊維として、ポリエチレンテレフタレートを芯成分とし、ポリエチレンを鞘成分とする同芯芯鞘型複合繊維Aを、耐久親水性の親水油剤でコーティングしたものを使用した。繊維Aの平均繊度は2.2dtex、平均繊維長は45mmである。
上記(1)で製造されたウェブと、図12に示される不織布製造装置300とを使用して、畝溝構造が形成された肌側表面を有する不織布を製造した。
不織布製造装置300における各種設定は、次の通りである。
噴射口332の直径:1.0mm(真円)
噴射口322のピッチ:3.0mm
噴射気体温度:310℃
1つの噴射口あたりの噴射気体風量:5L/分
ウェブ搬送速度:速度100m/分
通気性支持部材310(網状支持部材):70メッシュ
ヒータ部340による加熱処理:加熱処理温度を140℃、通過風速1.2m/秒で6秒間処理
(1)ウェブの製造
第1層及び第2層の積層体であるウェブを製造した。
第1層を構成する繊維として、ポリエチレンテレフタレートを芯成分とし、ポリエチレンを鞘成分とする同芯芯鞘型複合繊維Dを耐久親水性の親水油剤でコーティングしたものと、ポリエチレンテレフタレートを芯成分とし、ポリエチレンを鞘成分とする偏芯芯鞘型複合繊維Eを耐久親水性の親水油剤でコーティングしたものとの混合物(質量比1:1)を使用した。繊維Dの平均繊度は2.2dtex、平均繊維長は45mmである。繊維Eの平均繊度は2.2dtex、平均繊維長は44mmである。
噴射部330による気体噴射処理を行わなかった点を除き、実施例1と同様にして、上記(1)で製造されたウェブを使用して不織布を製造した。
実施例1及び比較例1で製造した不織布の乾燥時厚み及び湿潤時厚みを測定した。
なお、不織布の乾燥時厚み及び湿潤時厚みの測定方法は、上記の通りである。
実施例1で製造した不織布の乾燥時厚みは0.86mm、湿潤時厚みは0.79mmであった。湿潤時厚みは、乾燥時厚みの91%に相当した。
比較例1で製造した不織布の乾燥時厚みは0.78mm、湿潤時厚みは0.62mmであった。湿潤時厚みは、乾燥時厚みの80%に相当した。
トップシートの肌側表面に畝溝構造が形成されていない市販の尿取りパッド(比較品)と、トップシートとして製造例1で製造された不織布を採用した点を除き、比較品と同じ構成を有する尿取りパッド(本発明品)とを使用して、尿吸収時間を測定した。尿サンプルとして、寝たきりの高齢者A、B及びCから採取した尿サンプルA、B及びCを使用した。
200 外装体
111,211 腹側部
112,212 股間部
113,213 背側部
120,220 透液性のトップシート
121,220 トップシートの肌側面
122 畝部(凸部の一例)
123 溝部(凹部の一例)
124 畝溝構造(凹凸構造の一例)
130,230 不透液性のバックシート
140,240 吸収体
140a 第1層
140b 第2層
141 貫通孔
141a 第1層の貫通孔
141b 第2層の貫通孔
142,143 圧搾部
160 吸液性シート
163 吸収性ポリマー層
250a,250b サイドシート
255a,255b 防漏部
Claims (10)
- 透液性のトップシートと、不透液性のバックシートと、前記トップシート及び前記バックシートの間に配置された吸液性の吸収体とを備え、互いに直交する長さ方向、幅方向及び厚さ方向を有する吸収性物品であって、
前記トップシートは、凸部が形成された肌側表面を有する不織布であり、
前記吸収体は、前記吸収体を前記厚さ方向に貫通する貫通孔又は前記トップシート側に開口する凹部を有する、前記吸収性物品。 - 前記凸部は、前記長さ方向に延在する畝部である、請求項1に記載の吸収性物品。
- 前記貫通孔又は前記凹部は、前記吸収体の前記幅方向の中心を通って前記長さ方向に延在する、請求項1又は2に記載の吸収性物品。
- 前記吸収体は、第1吸収層と、前記第1吸収層の最小幅よりも小さい最大幅を有する第2吸収層であって、前記第1吸収層よりも前記バックシート側に位置する前記第2吸収層とを有する、請求項1~3のいずれか1項に記載の吸収性物品。
- 前記吸収体は、前記吸収体を厚さ方向に一体化する圧搾部であって、前記貫通孔又は前記凹部よりも前記幅方向の外側に形成された前記圧搾部を有する、請求項1~4のいずれか1項に記載の吸収性物品。
- 前記不織布のうち前記凸部における厚さ方向配向繊維の含有率は、前記不織布のうち前記凸部以外の部分における厚さ方向配向繊維の含有率よりも大きい、請求項1~5のいずれか1項に記載の吸収性物品。
- 前記吸収性物品は、透液性の第1シートと、透液性の第2シートと、前記第1シート及び前記第2シートの間に配置された吸収性ポリマー層とを有する吸液性シートであって、前記トップシート及び前記吸収体の間に配置された前記吸液性シートをさらに備え、
前記吸液性シートは、前記厚さ方向において前記貫通孔又は前記凹部と重ならないように配置されている、請求項1~6のいずれか1項に記載の吸収性物品。 - 前記吸収性物品は、前記長さ方向に並ぶ腹側部、股間部及び背側部を有し、
前記貫通孔又は前記凹部は、前記股間部に位置し、
前記吸液性シートは、前記背側部に位置する、請求項7に記載の吸収性物品。 - 吸収性物品が装着される装着面を有する透液性のトップシートと、不透液性のバックシートとを備え、腹側部、股間部及び背側部を有する外装体と、
前記装着面に脱着可能に装着された、請求項1~8のいずれか1項に記載の吸収性物品とを備える、着用物品。 - 前記外装体は、
前記装着面から起立可能な第1防漏部であって、前記装着面に固定された固定端部及び前記装着面から離間可能な自由端部を有する前記第1防漏部と、
前記第1防漏部の自由端部に伸張状態で取り付けられた第1弾性部材であって、伸張方向の両端部が前記装着面に固定された前記第1弾性部材と、
前記装着面から起立可能な第2防漏部であって、前記装着面に固定された固定端部及び前記装着面から離間可能な自由端部を有する前記第2防漏部と、
前記第2防漏部の自由端部に伸張状態で取り付けられた第2弾性部材であって、伸張方向の両端部が前記装着面に固定された前記第2弾性部材とを備え、
前記吸収性物品は、前記吸収性物品の前記幅方向の両側部分が、それぞれ、前記装着面と前記第1防漏部との間及び前記装着面と前記第2防漏部との間に位置するように、前記装着面に配置されており、
前記吸収性物品は、請求項7又は8に記載の吸収性物品であり、
前記吸収性ポリマー層の最大幅は、前記第1弾性部材と前記第2弾性部材との間隔よりも大きい、請求項9に記載の着用物品。
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- 2015-06-11 KR KR1020167036538A patent/KR102478713B1/ko active IP Right Grant
- 2015-06-22 TW TW104119996A patent/TWI680750B/zh active
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US11523946B2 (en) | 2017-03-31 | 2022-12-13 | Kimberly-Clark Worldwide, Inc. | Absorbent article with an exudate management layer |
US11596561B2 (en) | 2017-03-31 | 2023-03-07 | Kimberly-Clark Worldwide, Inc. | Absorbent article with an exudate management layer |
US11771605B2 (en) | 2017-03-31 | 2023-10-03 | Kimberly-Clark Worldwide, Inc. | Absorbent article with an exudate management layer |
US11969322B2 (en) | 2022-10-11 | 2024-04-30 | Kimberly-Clark Worldwide, Inc. | Absorbent article with an exudate management layer |
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MY185793A (en) | 2021-06-08 |
EP3162341A1 (en) | 2017-05-03 |
AU2015285607B2 (en) | 2019-09-19 |
TW201611801A (en) | 2016-04-01 |
EP3162341A4 (en) | 2017-06-21 |
AU2015285607A1 (en) | 2017-02-16 |
EP3162341B1 (en) | 2020-09-09 |
TWI680750B (zh) | 2020-01-01 |
US20170135869A1 (en) | 2017-05-18 |
CN106659607B (zh) | 2020-04-03 |
JP2016013209A (ja) | 2016-01-28 |
JP5669976B1 (ja) | 2015-02-18 |
CN106659607A (zh) | 2017-05-10 |
US10667961B2 (en) | 2020-06-02 |
KR102478713B1 (ko) | 2022-12-16 |
KR20170023016A (ko) | 2017-03-02 |
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