CN108472158B - Absorbent article - Google Patents
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- CN108472158B CN108472158B CN201680075750.2A CN201680075750A CN108472158B CN 108472158 B CN108472158 B CN 108472158B CN 201680075750 A CN201680075750 A CN 201680075750A CN 108472158 B CN108472158 B CN 108472158B
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- sheet
- absorbent article
- nonwoven fabric
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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
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- Heart & Thoracic Surgery (AREA)
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- Absorbent Articles And Supports Therefor (AREA)
Abstract
The invention provides an absorbent article which can inhibit liquid excrement from seeping out through a back sheet and has excellent air permeability. An absorbent article (1) is provided with: a surface sheet (2) formed of a nonwoven fabric, a back sheet (3) formed of a hydrophobic nonwoven fabric, and an intermediate sheet (4) positioned between these sheets, wherein the intermediate sheet (4) is formed of a hydrophobic nonwoven fabric and has a thickness reduction rate due to a load of 4900Pa which is smaller than that of the surface sheet (2).
Description
Technical Field
The present invention relates to an absorbent article such as a panty liner, a light incontinence pad, a sanitary napkin, or the like.
Background
In absorbent articles such as sanitary pads, light incontinence pads, and sanitary napkins, basic performances such as absorption performance have been improved by technological development accumulated over the years, and leakage and the like have been reduced after absorption of excreta such as urine and menstrual blood as compared with the conventional ones.
For example, patent document 1 discloses an absorbent article comprising at least a topsheet made of a nonwoven fabric, a backsheet, and a cushion layer located between the topsheet and the backsheet, wherein the topsheet has a three-dimensional structure in which convex regions and concave regions are three-dimensionally formed so as to be alternately repeated at predetermined pitches, the topsheet has a thickness of 0.5 to 5mm in a state where a pressure of 49pa is applied, the cushion layer has a thickness of 49pa applied which is equal to or greater than the thickness of the topsheet, and the cushion layer has a compression characteristic value lower than that of the topsheet. In the absorbent article disclosed in patent document 1, since the cushion layer provided under the topsheet is thicker and softer than the topsheet, the difference in height between the convex and concave regions formed in the topsheet is less likely to collapse, and the absorbent article is thin, but a soft appearance and a good tactile sensation can always be obtained.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2003-339761
Disclosure of Invention
Problems to be solved by the invention
However, if a cushion layer that is easily collapsed is provided under the topsheet as in the absorbent article disclosed in patent document 1, when a pressure is applied in the thickness direction of the absorbent article due to the body pressure of the wearer of the absorbent article, etc., the cushion layer preferentially collapses and the distance between the topsheet and the backsheet becomes narrow, so that liquid excrement such as urine supplied onto the topsheet easily reaches the backsheet, and in some cases, the liquid excrement seeps out to the back surface side (non-skin surface side) of the absorbent article through the backsheet, and there is a possibility that underwear or the like of the wearer may be soiled.
Further, when the back sheet is formed of a liquid-impermeable sheet such as a resin film in order to prevent such liquid excreta from oozing out, the back sheet is generally low in air permeability, and moisture is trapped between the skin surface of the wearer and the absorbent article, so that stuffiness is likely to occur, and there is a possibility that discomfort may be given to the wearer.
Accordingly, an object of the present invention is to provide an absorbent article which can suppress liquid excrement from leaking out through a back sheet and has excellent air permeability.
Means for solving the problems
One aspect (aspect 1) of the present invention is an absorbent article including: a surface sheet formed of a nonwoven fabric, a back sheet formed of a hydrophobic nonwoven fabric, and an intermediate sheet located between these sheets, the aforementioned intermediate sheet being formed of a hydrophobic nonwoven fabric and having a thickness reduction rate due to a load of 4900Pa which is smaller than that of the aforementioned surface sheet.
In the absorbent article of the embodiment 1, since the intermediate sheet and the back sheet are each made of a hydrophobic nonwoven fabric, these sheets are less likely to absorb and retain liquid excreta such as urine and menstrual blood (less likely to cause liquid pooling), and the liquid excreta is more likely to be retained by the top sheet or between the top sheet and the intermediate sheet.
In the absorbent article of embodiment 1, since the rate of thickness reduction of the intermediate sheet due to the 4900Pa load (hereinafter, the "4900 Pa load" may be simply referred to as a "specific load") is smaller than the rate of thickness reduction of the topsheet (that is, the intermediate sheet is relatively less likely to collapse than the topsheet), even when pressure is applied in the thickness direction of the absorbent article due to body pressure of a wearer of the absorbent article, or the like, the topsheet collapses preferentially than the intermediate sheet to absorb the pressure, and the thickness of the intermediate sheet is less likely to decrease. When the topsheet and the backsheet are not easily accessible as described above, since a certain degree of separation between the topsheet and the backsheet can be ensured through the intermediate sheet made of the hydrophobic nonwoven fabric, liquid excreta held between the topsheet and the backsheet (hereinafter, sometimes simply referred to as "liquid excreta held on the topsheet or the like") does not easily reach the backsheet, and as a result, the liquid excreta does not easily seep out to the back surface side of the absorbent article through the backsheet (hereinafter, sometimes "liquid excreta seeps out to the back surface side of the absorbent article through the backsheet" simply referred to as "seeping out of liquid excreta").
On the other hand, in the absorbent article of the aspect 1, since the back sheet is made of the hydrophobic nonwoven fabric, ventilation through the back sheet is easy, and excellent ventilation can be exhibited as the absorbent article.
Therefore, the absorbent article of embodiment 1 can exhibit excellent air permeability while suppressing the exudation of liquid excreta.
In another aspect (aspect 2) of the present invention, in the absorbent article according to aspect 1, the intermediate sheet has a plurality of joining portions that include heat-fusible fibers and join the heat-fusible fibers to each other, and the top sheet does not include the heat-fusible fibers or has a smaller content of the heat-fusible fibers than the intermediate sheet.
In the absorbent article according to embodiment 2, the intermediate sheet contains the heat-fusible fibers (more specifically, the heat-fusible fibers form the bonded portions (welded portions) at a plurality of positions), whereby the rigidity is improved and the absorbent article is less likely to collapse, while the top sheet contains no heat-fusible fibers or contains less heat-fusible fibers than the intermediate sheet (mass ratio), and the bonded portions (welded portions) formed by the heat-fusible fibers do not exist in the nonwoven fabric constituting the top sheet or are less than the bonded portions (welded portions) in the nonwoven fabric constituting the intermediate sheet, whereby the rigidity of the top sheet is lower than the rigidity of the intermediate sheet (that is, the intermediate sheet is less likely to collapse than the top sheet).
Therefore, in the absorbent article of the aspect 2, since the liquid excrement held on the topsheet or the like and the backsheet can be more reliably spaced from each other through the intermediate sheet, the liquid excrement is less likely to reach the backsheet, and as a result, the liquid excrement is less likely to leak out to the back side of the absorbent article through the backsheet.
In another aspect (aspect 3) of the present invention, in the absorbent article according to aspect 1 or 2, the nonwoven fabric that forms the top sheet contains hydrophilic fibers at a mass ratio of 50 mass% or more.
In the absorbent article of embodiment 3, the nonwoven fabric constituting the top sheet contains the hydrophilic fibers in an amount of 50 mass% or more, and therefore the liquid excrement is more easily absorbed and retained in the top sheet.
Therefore, in the absorbent article of the aspect 3, in particular, as compared with the case where the liquid excrement is held between the topsheet and the intermediate sheet, the liquid excrement can be more reliably spaced from the backsheet, and therefore the liquid excrement can be more less likely to ooze out.
Further, in another aspect (aspect 4) of the present invention, in the absorbent article according to any one of aspects 1 to 3, a 1 st adhesive layer is disposed between the front sheet and the intermediate sheet, a 2 nd adhesive layer is disposed between the intermediate sheet and the back sheet, and the 1 st adhesive layer and the 2 nd adhesive layer are disposed so that their respective patterns do not overlap in the thickness direction of the absorbent article.
In the absorbent article of embodiment 4, since the topsheet and the intermediate sheet, and the intermediate sheet and the backsheet are bonded to each other through the 1 st adhesive layer and the 2 nd adhesive layer, respectively, positional displacement and deformation between these sheets are less likely to occur, and therefore the effects of suppressing the exudation of liquid excreta and the like described above can be exhibited more stably.
Further, since the 1 st adhesive layer between the front sheet and the intermediate sheet and the 2 nd adhesive layer between the intermediate sheet and the back sheet are arranged so that the arrangement patterns thereof do not overlap in the thickness direction of the absorbent article, even when an excessive pressure is applied in the thickness direction of the absorbent article due to the body pressure of the wearer or the like and the intermediate sheet temporarily collapses, the respective adhesive layers (i.e., the 1 st adhesive layer and the 2 nd adhesive layer) are less likely to come into contact and be joined, and when the excessive pressure is released, the thickness of the intermediate sheet is likely to be recovered.
Therefore, the absorbent article of embodiment 4 can suppress the exudation of the liquid excrement more stably and continuously.
In another aspect (aspect 5) of the present invention, in the absorbent article according to any one of aspects 1 to 3, an absorber is disposed between the topsheet and the intermediate sheet.
In the absorbent article of embodiment 5, since the absorbent body is disposed between the topsheet and the intermediate sheet, even if liquid excrement penetrates through the topsheet, the liquid excrement can be absorbed and retained in the absorbent body.
Therefore, in the absorbent article of the aspect 5, the liquid excrement is less likely to reach the intermediate sheet and the back sheet, and therefore the exudation of the liquid excrement can be more reliably suppressed.
In another aspect (aspect 6) of the present invention, in the absorbent article according to any one of aspects 1 to 5, the top sheet has an uneven structure including convex portions protruding on the skin surface side and concave portions recessed on the non-skin surface side.
In the absorbent article of embodiment 6, since the topsheet has the above-described uneven structure, a space that allows air to pass is easily formed between the skin surface of the wearer and the topsheet (particularly between the skin surface of the wearer and the concave portions), and therefore, further excellent air permeability can be exhibited.
Further, when the surface sheet has such an uneven structure, a good feel when it is in contact with the skin can be obtained.
In another aspect (aspect 7) of the present invention, in the absorbent article according to aspect 6, the convex portions have hollow portions facing the surface of the topsheet on the non-skin surface side.
In the absorbent article of embodiment 7, since the inside of the convex portion is hollow and the topsheet has a structure that is more likely to collapse, the liquid excrement held on the topsheet and the like can be more reliably separated from the backsheet via the intermediate sheet, and the liquid excrement can be more reliably prevented from oozing out.
In another aspect (aspect 8) of the present invention, in the absorbent article according to any one of aspects 1 to 7, the hydrophobic nonwoven fabric constituting the back sheet includes a microfiber layer made of fibers having a fineness of 1 dtex or less.
In the absorbent article of embodiment 8, the hydrophobic nonwoven fabric constituting the back sheet includes the ultrafine fiber layer composed of fibers having a fineness of 1 dtex or less, and the ultrafine fiber layer can suppress the permeation of liquid (liquid excrement) while maintaining air permeability, so that the back sheet is less likely to cause the liquid excrement to ooze out without hindering air permeability.
In another aspect (aspect 9) of the present invention, in the absorbent article according to any one of aspects 1 to 8, the hydrophobic nonwoven fabric constituting the back sheet is an SMS nonwoven fabric.
In the absorbent article of embodiment 9, the hydrophobic nonwoven fabric constituting the back sheet is an SMS nonwoven fabric having a 3-layer structure of spunbond/meltblown/spunbond, and the SMS nonwoven fabric has both air permeability and a certain strength (particularly, by the spunbond layer), and effectively suppresses the permeation of liquid excreta (particularly, by the meltblown layer which is the ultrafine fiber layer), so that the back sheet can ensure air permeability and a certain strength, and more effectively and stably suppress the exudation of liquid excreta.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, an absorbent article which can suppress liquid excrement from leaking out through the back sheet and has excellent air permeability can be provided.
Drawings
Fig. 1 is a partially broken perspective view of a panty liner 1 according to an embodiment of the invention.
Fig. 2 is a partial sectional view of a panty liner 1 according to an embodiment of the invention, taken along the line II-II in fig. 1.
Fig. 3 is a partial sectional view corresponding to fig. 2 schematically showing a state where pressure is applied to a pantiliner 1 according to an embodiment of the present invention from the topsheet side.
Fig. 4 is a partial cross-sectional view of a panty liner 1' corresponding to fig. 2 according to a further embodiment of the invention.
Detailed Description
Hereinafter, preferred embodiments of the absorbent article of the present invention will be described in detail with reference to the accompanying drawings. In the present specification, unless otherwise specified, "an object (for example, an absorbent article, an absorber, or the like) placed on a horizontal plane in a spread state is simply referred to as" in plan view "when viewed from above in the vertical direction (the top sheet side when the object is an absorbent article) in the thickness direction of the object.
The various directions and the like used in the present specification are as follows unless otherwise specified.
In the present specification, "the width direction W" refers to a direction (short side direction) in which the length of a longitudinal object is short in a plan view, "the length direction L" refers to a direction in which the length of the longitudinal object is long in a plan view, "the thickness direction T" refers to a direction perpendicular to the object placed on a horizontal plane in a developed state, "and these width direction W, length direction L, and thickness direction T are orthogonal to each other.
In the present specification, unless otherwise specified, "the side located relatively close to the skin surface of the wearer when the absorbent article is worn" is referred to as "skin surface side" and "the side located relatively far from the skin surface of the wearer when the absorbent article is worn" is referred to as "non-skin surface side" in the thickness direction T of the absorbent article. In the present specification, the "non-skin surface side" may be referred to as a "back surface side".
Fig. 1 is a partially broken perspective view of a panty liner 1 (absorbent article) according to an embodiment of the invention, and fig. 2 is a partial cross-sectional view of the panty liner 1 along the line II-II in fig. 1. Fig. 3 is a partial cross-sectional view corresponding to fig. 2, schematically showing a state in which pressure is applied to the sanitary pad 1 from the topsheet side.
The sanitary pad 1 according to one embodiment of the present invention has a shape in which an outer shape is long in the longitudinal direction L in a plan view, and further has a substantially elliptical longitudinal shape in which an outer edge of a substantially central portion in the longitudinal direction L is slightly tapered in the width direction W. In the present invention, the outer shape of the absorbent article is not particularly limited, and if the absorbent article has a vertically long shape in which the length dimension in the longitudinal direction L is longer than the width dimension in the width direction W, any shape (for example, a rectangular shape, an oval shape, a gourd-shaped shape, or the like) can be adopted according to various uses or the like.
As shown in FIGS. 1 and 2, the present embodimentThe sanitary pad 1 of the embodiment includes in the thickness direction T: a surface sheet 2 made of nonwoven fabric and having an uneven structure, which is positioned on the skin surface side of the wearer; a back sheet 3 which is positioned on the non-skin surface side of the wearer and is formed of a hydrophobic nonwoven fabric; and an intermediate sheet 4 formed of a hydrophobic nonwoven fabric and positioned between these sheets. In the present embodiment, the first adhesive layer a using a hot-melt adhesive described later is interposed between the front sheet 2 and the intermediate sheet 4, and between the intermediate sheet 4 and the back sheet 31And 2 nd adhesive layer A2And (6) jointing.
As shown in fig. 2, the back sheet 3 includes a garment-fixing adhesive section to be worn in which a plurality of adhesive layers 6 extending continuously in the width direction W are arranged in a line (so-called stripe pattern) along the longitudinal direction L on the surface on the non-skin surface side, and a release sheet 5 for protecting the garment-fixing adhesive section to be worn before use is arranged on the surface on the non-skin surface side of the garment-fixing adhesive section to be worn. The adhesive forming the adhesive layer is not particularly limited as long as the absorbent article can be fixed to clothing (e.g., underwear) worn by the wearer, and any adhesive including styrene-based polymers and the like can be used. The arrangement pattern of the adhesive layer in the garment-fastening adhesive section to be worn is not particularly limited, and the adhesive layer may be intermittently elongated in the width direction W or may be elongated in the longitudinal direction L.
The sanitary pad 1 is worn by peeling the release sheet 5 off during wearing, fixing the sanitary pad 1 to the inner surface of clothing 7 (e.g., underwear) worn by the wearer by the worn clothing fixing adhesive section disposed on the surface of the back sheet 3 on the non-skin surface side, and facing the surface sheet 2 to the skin surface of the wearer. When liquid excrement such as urine is discharged from the wearer, the liquid excrement is supplied to the skin-side surface of the topsheet 2 of the sanitary pad 1 and absorbed and retained in the topsheet 2, but when the amount of liquid excrement is large, part of the liquid excrement permeates through the topsheet 2 and is retained between the topsheet 2 and the intermediate sheet 4 made of hydrophobic nonwoven fabric.
In the pantiliner 1 of the present embodiment, the thickness reduction rate of the intermediate sheet 4 made of the hydrophobic nonwoven fabric due to the 4900Pa load is smaller than the thickness reduction rate of the topsheet 2. By providing such an intermediate sheet 4, the sanitary pad 1 can maintain the thickness of the intermediate sheet 4 even when pressure is applied from the surface sheet 2 side by the body pressure of the wearer or the like, the surface sheet 2 preferentially collapses compared with the intermediate sheet 4 to absorb the pressure, and the surface sheet 2 and the back sheet 3 are spaced apart from each other by a certain distance through the intermediate sheet 4. As a result, the liquid excreta held by the topsheet 2 and the like hardly reaches the backsheet 3, and therefore the liquid excreta hardly seeps out to the non-skin surface side of the sanitary pad 1 through the backsheet 3.
On the other hand, since the back sheet 3 is made of hydrophobic nonwoven fabric, the sanitary pad 1 is easily ventilated through the back sheet 3, and can exhibit excellent air permeability.
Hereinafter, various members constituting the absorbent article of the present invention will be described in more detail.
< surface sheet >
In the sanitary pad 1 of the present embodiment, the top sheet 2 is formed of a nonwoven fabric having a certain water absorption property and liquid retention property, which can be directly brought into contact with the skin surface of the wearer, is disposed at a position on the skin surface side in the thickness direction T of the sanitary pad 1, as shown in fig. 1 and 2.
The nonwoven fabric constituting the top sheet is not particularly limited as long as the thickness reduction rate due to a load of 4900Pa (specific load) is larger than the thickness reduction rate due to the same specific load of an intermediate sheet (i.e., the nonwoven fabric is more easily collapsed than the intermediate sheet) described later, and any nonwoven fabric such as a spunlace nonwoven fabric, a breathable nonwoven fabric, a spunbonded nonwoven fabric, a point-bonded nonwoven fabric, a meltblown nonwoven fabric, and a combination thereof (e.g., SMS nonwoven fabric) may be used. Among them, a spunlace nonwoven fabric is preferably used from the viewpoint of easily obtaining a nonwoven fabric having excellent flexibility and the like and having the above-mentioned predetermined thickness reduction ratio.
Further, from the viewpoint of water absorption, liquid retention, and the like, hydrophilic fibers are preferably used as fibers constituting the nonwoven fabric, and more specifically, cellulose fibers such as cotton and ground pulp; regenerated cellulose fibers such as rayon and fibrillated rayon; semi-synthetic cellulose fibers such as acetate and triacetate; and hydrophilized thermoplastic resin fibers and composite fibers. Among them, cellulose fibers such as cellulose fibers, regenerated cellulose fibers, and semi-synthetic cellulose fibers are preferably used from the viewpoint of easily obtaining a nonwoven fabric having excellent water absorption, liquid retention, flexibility, and the like and having a predetermined thickness reduction ratio described later, and particularly, a mixed fiber of cotton, rayon, or a combination thereof is preferably used.
In addition, in the case where the absorbent article includes an absorbent body capable of absorbing and retaining liquid excrement such as urine, or in the case where the amount of liquid excrement to be targeted is small, the nonwoven fabric constituting the top sheet may contain polyolefin fibers such as Polyethylene (PE) and polypropylene (PP) in addition to the above-described hydrophilic fibers; polyester fibers such as polyethylene terephthalate (PET); the nonwoven fabric constituting the surface sheet preferably contains hydrophilic fibers in a mass ratio of 50 mass% or more. Since the nonwoven fabric constituting the topsheet contains the hydrophilic fiber in a mass ratio of 50 mass% or more, the topsheet can ensure a certain or more absorption performance, and the absorbent article provided with the topsheet can more reliably space the liquid excrement held on the topsheet and the backsheet, and thus the liquid excrement is less likely to ooze out, particularly as compared with the case where the liquid excrement is held between the topsheet and the intermediate sheet.
As described above, the nonwoven fabric constituting the top sheet may contain heat-fusible fibers in addition to hydrophilic fibers in order to improve the sheet strength, but particularly when the intermediate sheet described later contains heat-fusible fibers, the nonwoven fabric constituting the top sheet preferably does not contain heat-fusible fibers or contains heat-fusible fibers in a content (mass ratio) smaller than the content (mass ratio) of the heat-fusible fibers in the intermediate sheet. If the nonwoven fabric constituting the surface sheet does not contain the heat-fusible fibers or if it contains the heat-fusible fibers in a content less than that of the intermediate sheet, the bonded portions (welded portions) formed by welding the heat-fusible fibers are not present in the nonwoven fabric constituting the surface sheet or are present in a number less than the number of bonded portions (welded portions) in the hydrophobic nonwoven fabric constituting the intermediate sheet even if present, and therefore the rigidity of the surface sheet is lower than that of the intermediate sheet (that is, the surface sheet is relatively more likely to collapse than the intermediate sheet).
Therefore, in the absorbent article including the topsheet, the liquid excrement held on the topsheet and the backsheet can be more reliably separated from each other through the intermediate sheet, and therefore the liquid excrement is less likely to reach the backsheet, and as a result, the liquid excrement is less likely to leak out to the non-skin surface side of the absorbent article through the backsheet.
In the present invention, the basis weight of the surface sheet is not particularly limited as long as the effect of the present invention is not impaired, and any basis weight can be used in consideration of water absorption, liquid retention, ease of collapse under load, and the like. Such a basis weight may be, for example, 10g/m2～100g/m2Preferably in the range of 20g/m2～50g/m2Within the range of (1). The basis weight can be measured according to 5.2 of JIS L1906.
Further, the thickness of the top sheet is not particularly limited as long as the effect of the present invention is not hindered, and for example, a thickness in the range of 0.001mm to 5.0mm can be adopted, but from the viewpoint of water absorption, liquid retention, cushioning properties, feeling when contacting the skin, and the like, a thickness in the range of 0.01mm to 3.0mm is preferable, and a thickness in the range of 0.1mm to 1.0mm is more preferable.
The thickness of the top sheet under the above-mentioned specific load is not particularly limited as long as the thickness reduction rate under the specific load is larger than that under the same specific load of the intermediate sheet described later, and for example, the top sheet is made of cotton orWith a basis weight of 30g/m, based on rayon2In the case of the spun lace nonwoven fabric of (3), the thickness under the above specific load is about 0.26 mm.
Here, the thickness of the surface sheet and the intermediate sheet described later (i.e., the thickness before application of a specific load), the thickness under a specific load, and the thickness reduction rate can be measured by the following measurement methods. The thickness of various members (for example, a back sheet) other than the front sheet and the intermediate sheet can be measured in the same manner by the following measurement method.
[ measurement methods for various thicknesses and reduction ratios of thicknesses ]
(1) A sample sheet of a predetermined size (for example, 100 mm. times.100 mm) is cut out from a sheet to be measured.
(2) The cut sample sheet was mounted on an automatic compression testing machine "KES FB-3A" of KATO TECH co., ltd., and the thickness (mm) at a pressure of 49Pa to the sample sheet was measured by a measurement terminal of the testing machine, and the measured thickness (mm) was used as the thickness of the sample sheet (i.e., the thickness before applying a specific load).
(3) Similarly, the thickness (mm) of the sample sheet under a pressure of 4900Pa was measured using the measurement terminal of the test machine, and the measured thickness (mm) was defined as the thickness of the sample sheet under a specific load.
(4) The thickness (mm) under the specific load measured as described above is divided by the thickness (mm) before the application of the load and converted into a percentage (%), thereby calculating the thickness reduction rate (%) due to the specific load.
In the absorbent article of the present invention, the structure of the topsheet is not particularly limited as long as the effect of the present invention is not impaired, and for example, both the skin surface side and the non-skin surface side may have a substantially flat structure, but the topsheet preferably has a concavo-convex structure including a plurality of convex portions protruding on the skin surface side and a plurality of concave portions recessed on the non-skin surface side, and further preferably the convex portions have hollow portions facing the surface on the non-skin surface side of the topsheet. When the top sheet has the above-described uneven structure, a space that allows air to pass is formed between the skin surface of the wearer and the top sheet (particularly between the skin surface of the wearer and the concave portion), and therefore further excellent air permeability can be imparted to the absorbent article. When the surface sheet has such an uneven structure, a more favorable feel when contacting the skin can be imparted to the absorbent article, and the amount of absorption can be increased by increasing the surface area.
Further, in the above-described uneven structure, if the convex portion has a hollow portion facing the surface of the front sheet on the non-skin surface side (that is, if the inside of the convex portion is hollow), the convex portion has low rigidity and is likely to collapse, and thus the front sheet can be more likely to collapse than the intermediate sheet. Thus, even if a pressure is applied in the thickness direction of the absorbent article by the body pressure of the wearer or the like, as shown in fig. 3, the topsheet collapses preferentially over the intermediate sheet, and the pressure is easily absorbed, and the thickness of the intermediate sheet can be more reliably maintained (that is, the liquid excreta held on the topsheet or the like and the back sheet can be more reliably spaced apart from each other via the intermediate sheet), so that the exudation of the liquid excreta can be more reliably suppressed.
In the above-described uneven structure, the pitch of the convex portions (i.e., the distance (mm) between the centers of the tops of two adjacent convex portions) is not particularly limited, and a pitch in the range of 0.5mm to 5.0mm may be employed, but is preferably in the range of 1.0mm to 4.0mm from the viewpoint of cushioning properties, feeling when touching the skin, and the like. The pitch of the convex portions can be measured as a distance (mm) between the centers of tops of two adjacent convex portions based on a plane photograph or a plane image of the surface sheet in the non-pressurized state.
The structure and shape of the convex portions and the concave portions in the above-described uneven structure are not particularly limited, and for example, a structure in which the convex portions are convex portions extending in the longitudinal direction and/or the width direction, and the concave portions are concave portions located between 2 adjacent convex portions (for example, a convex-concave structure having a wave-shaped cross section as shown in fig. 1 and 2, or the like) may be employed; the projections and the recesses have any concave-convex structure such as a circular or rectangular structure in plan view.
When the topsheet has the uneven structure having a wavy cross section as shown in fig. 1 and 2, the topsheet is joined to the intermediate sheet or the absorbent body described later on the surface of the uneven structure on the non-skin surface side of the depressions. Means for joining the top sheet to the intermediate sheet or the absorbent body is not particularly limited, and for example, a hot melt adhesive, a heat sealing method such as heat sealing, or the like, which will be described later, can be used.
The method of forming the uneven structure on the surface sheet is not particularly limited, and for example, a method of forming a convex-concave groove-like uneven structure by continuously blowing gas (usually air) to the fiber woven sheet as disclosed in japanese patent laid-open nos. 2008-25079, 2008-23326, 2009-30218, and the like; a method using vacuum forming; a method using gear drawing; and a method utilizing thermal elongation of a thermally extensible fiber and/or thermal shrinkage of a thermally shrinkable fiber.
In the present invention, the nonwoven fabric constituting the surface sheet may be subjected to hydrophilization treatment. The method of hydrophilizing treatment is not particularly limited, and examples thereof include a method of coating a hydrophilizing agent on the surface of a nonwoven fabric; a method of coating a hydrophilizing agent on the surface of fibers constituting a nonwoven fabric; a method of adding a hydrophilizing agent to a resin which is a raw material of fibers constituting the nonwoven fabric, and the like.
< intermediate sheet >
In the pantiliner 1 of the present embodiment, the intermediate sheet 4 is made of a hydrophobic nonwoven fabric which is disposed so as to be positioned between the front sheet 2 and the back sheet 3 in the thickness direction T of the pantiliner 1 as shown in fig. 1 and 2, and functions so that the front sheet 2 and the back sheet 3 are spaced apart in the thickness direction T. If the intermediate sheet 4 is made of such a hydrophobic nonwoven fabric, the liquid excrement that has permeated through the top sheet 2 is less likely to be absorbed and retained by the intermediate sheet 4, and the liquid excrement is more likely to be retained between the top sheet 2 and the intermediate sheet 4 and in the top sheet 2, so that the liquid excrement and the back sheet 3 are more likely to be spaced apart from each other via the intermediate sheet 4.
The degree of hydrophobicity of the hydrophobic nonwoven fabric constituting the intermediate sheet is sufficient if the water is dropped on the surface of the hydrophobic nonwoven fabric to such an extent that the dropped water is not absorbed, but the degree of hydrophobicity (so-called water repellency) is preferably such that the dropped water is repelled on the surface of the hydrophobic nonwoven fabric to form water droplets when the water is dropped on the surface of the hydrophobic nonwoven fabric. If the intermediate sheet is made of a nonwoven fabric having such water repellency, the liquid excrement permeating through the top sheet is further less likely to be absorbed and retained by the intermediate sheet, and therefore the liquid excrement is further more likely to be retained between the top sheet and the intermediate sheet and in the top sheet, and further more likely to be separated from the back sheet via the intermediate sheet.
Further, in the present invention, the rate of thickness reduction due to the 4900Pa load is smaller for the intermediate sheet than for the surface sheet due to the same load (i.e., less likely to collapse compared to the surface sheet). By providing such an intermediate sheet, even if a pressure is applied in the thickness direction of the absorbent article by the body pressure of the wearer or the like, the absorbent article of the present invention can maintain the thickness of the intermediate sheet and the surface sheet collapses preferentially compared with the intermediate sheet to absorb the pressure, and therefore, a state can be ensured in which the surface sheet and the back sheet are spaced apart from each other by the intermediate sheet to some extent in the thickness direction T of the absorbent article. As a result, the liquid excrement held on the topsheet or the like is less likely to reach the backsheet, and therefore the liquid excrement is less likely to leak out to the non-skin surface side of the absorbent article through the backsheet.
In the present invention, the hydrophobic nonwoven fabric constituting the intermediate sheet is not particularly limited as long as the thickness reduction rate under the specific load is smaller than the thickness reduction rate under the same specific load of the top sheet, and for example, the same kind of nonwoven fabric as the top sheet can be used, but from the viewpoint of easily obtaining a nonwoven fabric which is not easily penetrated by liquid excreta and has the predetermined thickness reduction rate, a breathable nonwoven fabric is preferably used.
In the present invention, the intermediate sheet may be composed of a single-layer hydrophobic nonwoven fabric using a hydrophobic nonwoven fabric alone, or may be composed of a laminated hydrophobic nonwoven fabric using 2 or more sheets of hydrophobic nonwoven fabrics. When the intermediate sheet is formed of a hydrophobic laminated nonwoven fabric, the distance between the front sheet and the back sheet can be arbitrarily adjusted by adjusting the number of layers of the hydrophobic laminated nonwoven fabric, and a predetermined function (for example, a water retention function, a pressure buffering function, or the like) can be assigned to each layer.
Further, the fibers constituting the hydrophobic nonwoven fabric are not particularly limited as long as they have hydrophobicity, and for example, polyolefin-based fibers such as Polyethylene (PE) and polypropylene (PP); polyester fibers such as polyethylene terephthalate (PET); hydrophobic thermoplastic resin fibers such as conjugate fibers. In addition, in order to improve the rigidity, the hydrophobic nonwoven fabric constituting the intermediate sheet may contain heat-fusible fibers, but particularly in the case where the surface sheet contains heat-fusible fibers, the hydrophobic nonwoven fabric constituting the intermediate sheet preferably contains heat-fusible fibers in a content (mass ratio) larger than the content (mass ratio) of the heat-fusible fibers in the surface sheet. When the hydrophobic nonwoven fabric constituting the intermediate sheet contains the heat-fusible fibers in an amount larger than the amount of the heat-fusible fibers in the surface sheet, the number of joined portions (welded portions) formed by welding the heat-fusible fibers in the hydrophobic nonwoven fabric constituting the intermediate sheet is larger than the number of joined portions (welded portions) in the nonwoven fabric constituting the surface sheet, and therefore the rigidity of the intermediate sheet is higher than that of the surface sheet (that is, the intermediate sheet is less likely to collapse than the surface sheet).
In the present invention, the basis weight of the intermediate sheet is not particularly limited as long as the effects of the present invention are not impaired, and any basis weight can be used in consideration of the degree of difficulty in collapse under load. Such a basis weight may be, for example, 20g/m2～200g/m2Preferably in the range of 30g/m2～100g/m2Within the range of (1). When the intermediate sheet is formed of the hydrophobic laminated nonwoven fabric, the total basis weight of the basis weights of the layers constituting the hydrophobic laminated nonwoven fabric isWithin the above range.
Further, the thickness of the intermediate sheet is not particularly limited as long as the effect of the present invention is not inhibited, and for example, a thickness in the range of 0.01mm to 8.0mm can be adopted, but from the viewpoint of the degree of difficulty in collapse under load, it is preferably in the range of 0.05mm to 5.0mm, and more preferably in the range of 0.1mm to 3.0 mm. When the intermediate sheet is formed of the hydrophobic laminated nonwoven fabric, the total thickness of the layers constituting the hydrophobic laminated nonwoven fabric may be within the above range.
The thickness of the intermediate sheet under the specific load is not particularly limited as long as the thickness reduction rate under the specific load is smaller than that under the same specific load of the top sheet, and the intermediate sheet has a basis weight of, for example, 40g/m2In the case of the water-repellent laminated nonwoven fabric comprising 2 stacked spunlace nonwoven fabrics, the thickness under the above-mentioned specific load is about 0.39 mm.
< Back sheet >
In the sanitary pad 1 of the present embodiment, the back sheet 3 is made of a hydrophobic nonwoven fabric which is disposed at a position on the non-skin surface side in the thickness direction T of the sanitary pad 1 as shown in fig. 1 and 2, has air permeability, and functions to prevent liquid excreta such as urine and menstrual blood discharged from the wearer from permeating therethrough. When the back sheet is made of such a hydrophobic nonwoven fabric, even if the liquid excrement that has permeated through the top sheet further permeates through the intermediate sheet, the liquid excrement is not easily absorbed and retained by the back sheet, and further, the liquid excrement is not easily permeated through the back sheet, so that the liquid excrement is not easily exuded. Further, if the back sheet is made of a hydrophobic nonwoven fabric, ventilation through the back sheet is facilitated, and excellent ventilation properties can be exhibited as an absorbent article.
The hydrophobic nonwoven fabric constituting the back sheet has a degree of hydrophobicity similar to that of the intermediate sheet, and is sufficient if the water drops on the surface of the hydrophobic nonwoven fabric to such an extent that the dropped water is not absorbed, but is preferably a degree of hydrophobicity (so-called water repellency) that the dropped water is repelled on the surface of the hydrophobic nonwoven fabric to form water droplets when the water drops on the surface of the hydrophobic nonwoven fabric. When the back sheet is made of a nonwoven fabric having such water repellency, the liquid excrement permeating through the top sheet and the intermediate sheet is less likely to permeate through the back sheet, and therefore the liquid excrement is less likely to bleed out.
In the present invention, the hydrophobic nonwoven fabric constituting the back sheet is not particularly limited as long as it is air-permeable and can function to prevent the permeation of liquid excrement, and any nonwoven fabric such as a spunbond nonwoven fabric, a point-bond nonwoven fabric, a meltblown nonwoven fabric, and an SMS nonwoven fabric may be used, and among such nonwoven fabrics, a nonwoven fabric including a microfiber layer made of fibers having a fineness of 1 dtex or less is preferably used. When the hydrophobic nonwoven fabric constituting the back sheet contains such a microfine fiber layer, the microfine fiber layer can easily suppress the permeation of liquid (liquid excrement) while maintaining particularly air permeability, and therefore the back sheet can be further prevented from suffering the exudation of liquid excrement without hindering air permeability. The lower limit of the fineness of the fibers constituting the microfiber layer is not particularly limited, and is, for example, about 0.1 dtex.
Among the above nonwoven fabrics, SMS nonwoven fabrics are particularly preferably used. Since the SMS nonwoven fabric is a laminated nonwoven fabric having a 3-layer structure of spunbond/meltblown/spunbond, and has both air permeability and a certain strength (particularly, by a spunbond layer), and further can more effectively suppress the bleeding of liquid excrement (particularly, by a meltblown layer which is an ultrafine fiber layer), when such a nonwoven fabric is used as a hydrophobic nonwoven fabric constituting the back sheet, the back sheet can more effectively and stably suppress the bleeding of liquid excrement while ensuring air permeability and a certain strength.
The constituent fibers of the hydrophobic nonwoven fabric constituting the back sheet are not particularly limited as long as they have hydrophobicity, and for example, polyolefin-based fibers such as Polyethylene (PE) and polypropylene (PP); polyester fibers such as polyethylene terephthalate (PET); hydrophobic thermoplastic resin fibers such as conjugate fibers.
In the present invention, the basis weight of the back sheet is not particularly limited as long as the effect of the present invention is not impaired, and any basis weight can be used in consideration of air permeability, liquid impermeability, and the like. Such a basis weight may be, for example, 8g/m2～60g/m2Preferably in the range of 15g/m2～50g/m2Within the range of (1).
Further, the thickness of the back sheet is not particularly limited as long as the effect of the present invention is not hindered, and for example, a thickness in the range of 0.01mm to 5.0mm may be adopted, but is preferably in the range of 0.05mm to 3.0mm from the viewpoint of air permeability, liquid impermeability, and the like.
< adhesive layer >
In the above embodiment, in the sanitary pad 1, the front sheet 2, the intermediate sheet 4 and the back sheet 3 are interposed by the 1 st adhesive layer a using a hot-melt adhesive agent, which is respectively disposed between the sheets (i.e., between the front sheet 2 and the intermediate sheet 4, and between the intermediate sheet 4 and the back sheet 3)1And 2 nd adhesive layer A2Are joined to each other. In the present invention, means for joining the sheets are not particularly limited, and any joining means such as a heat sealing method such as heat sealing may be used in addition to the hot-melt adhesive, but the hot-melt adhesive as in the above-described embodiments is preferably used from the viewpoint that the thickness of the sheet (particularly, the intermediate sheet) is not reduced at the time of joining. In the above embodiment, the 1 st adhesive layer a1And 2 nd adhesive layer A2The adhesive arrangement pattern in (2) is a plurality of spiral arrangement patterns extending in the longitudinal direction L, but in the present invention, the arrangement pattern is not limited to this arrangement pattern, and any arrangement pattern such as a plurality of Ω -like, wavy line-like, zigzag-like, stripe-like, or band-like patterns extending in the longitudinal direction and/or the width direction may be employed.
When the front sheet and the intermediate sheet, and the intermediate sheet and the back sheet are bonded to each other through the 1 st adhesive layer and the 2 nd adhesive layer, respectively, positional displacement and deformation between these sheets are less likely to occur, and therefore the effects of the present invention, such as suppression of exudation of liquid excreta, can be more stably exhibited.
In the present invention, it is preferable that the arrangement pattern of the 1 st adhesive layer between the top sheet and the intermediate sheet and the arrangement pattern of the 2 nd adhesive layer between the intermediate sheet and the back sheet are arranged so as not to overlap in the thickness direction of the absorbent article (that is, the arrangement pattern of the 1 st adhesive layer and the arrangement pattern of the 2 nd adhesive layer do not overlap in a plan view). Since the hot-melt adhesive has a constant adhesiveness even at room temperature (25 ℃), if the 1 st adhesive layer and the 2 nd adhesive layer are arranged in an arrangement pattern overlapping each other in the thickness direction of the absorbent article, when excessive pressure is applied in the thickness direction of the absorbent article due to the body pressure of the wearer or the like and the intermediate sheet temporarily collapses, the adhesive layers (i.e., the 1 st adhesive layer and the 2 nd adhesive layer) come into contact with each other and are joined to each other, and there is a possibility that the adhesive layers are held in a state where the distance between the top sheet and the back sheet is close (i.e., liquid excreta easily oozes out). However, if the 1 st adhesive layer and the 2 nd adhesive layer are arranged in respective arrangement patterns that do not overlap in the thickness direction of the absorbent article, even when excessive pressure is applied in the thickness direction of the absorbent article due to body pressure of the wearer or the like and the intermediate sheet temporarily collapses, the adhesive layers (i.e., the 1 st adhesive layer and the 2 nd adhesive layer) are less likely to come into contact and be joined, and when the excessive pressure is released, the thickness of the intermediate sheet is likely to be recovered (i.e., the state in which the surface sheet and the back sheet are spaced apart is likely to be recovered), so that the exudation of the liquid excreta can be suppressed more stably and continuously.
In the present specification, the arrangement pattern in which the 1 st adhesive layer and the 2 nd adhesive layer do not overlap in the thickness direction of the absorbent article means a mode in which the arrangement pattern of the 1 st adhesive layer and the arrangement pattern of the 2 nd adhesive layer do not overlap at all in the thickness direction of the absorbent article, and includes a mode in which the arrangement patterns partially overlap in the thickness direction of the absorbent article. That is, if the 1 st adhesive layer and the 2 nd adhesive layer are not bonded to each other when an excessive pressure is applied in the thickness direction of the absorbent article, the same effect as described above can be obtained even if the arrangement pattern of the 1 st adhesive layer and the arrangement pattern of the 2 nd adhesive layer partially overlap in the thickness direction of the absorbent article.
In addition, the arrangement pattern of the 1 st adhesive layer and the arrangement pattern of the 2 nd adhesive layer are preferably: the respective arrangement patterns do not overlap in the thickness direction of the absorbent article at least in a portion where liquid excreta can be supplied (for example, a central portion in the longitudinal direction of the absorbent article) when the absorbent article is viewed in plan, but may overlap in the thickness direction of the absorbent article in a portion where liquid excreta is not easily supplied (for example, both end portions in the longitudinal direction of the absorbent article) when the absorbent article is viewed in plan.
< absorbent body >
The absorbent article of the present invention may be provided with an absorbent body capable of absorbing and retaining liquid excreta at a position between the topsheet and the intermediate sheet. Fig. 4 is a partial cross-sectional view of a panty liner 1' corresponding to fig. 2 according to a further embodiment of the invention. As in the embodiment shown in fig. 4, when the absorbent body 8 is disposed between the topsheet 2 and the backsheet 4, even if liquid excrement penetrates through the topsheet 2, the liquid excrement can be more reliably absorbed and held in the absorbent body 8, and therefore the liquid excrement is less likely to reach the backsheet 3 and the intermediate sheet 4, and the exudation of the liquid excrement can be more reliably suppressed.
In the absorbent article of the present invention, the absorbent body is not particularly limited as long as it can absorb and retain liquid excreta, and any absorbent body known in the art can be used. Examples of such an absorbent body include an absorbent body in which an absorbent core made of an absorbent material is covered with a core wrap sheet such as a hydrophilic tissue. Examples of the absorbent material constituting the absorbent core include hydrophilic fibers, super absorbent polymers, and the like, and more specifically, cellulose fibers such as ground pulp and cotton; regenerated cellulose fibers such as rayon and fibrillated rayon; semi-synthetic cellulose fibers such as acetate and triacetate; and pellets made of a highly absorbent polymer such as a sodium acrylate copolymer, and an arbitrary combination of two or more of these.
As described above, the absorbent article of the present invention is constituted by the surface sheet, the intermediate sheet and the back sheet which are respectively specified, and therefore, it is possible to suppress liquid excrement such as urine discharged from the wearer from leaking out to the non-skin surface side via the back sheet, and it is possible to easily perform air permeation via the back sheet, and excellent air permeability is exhibited.
The present invention can be applied to various absorbent articles such as sanitary napkins and (light) incontinence pads, in addition to the pantiliners of the above-described embodiments. The absorbent article of the present invention is not limited to the above-described embodiments, and can be appropriately combined with, modified, or the like without departing from the object and spirit of the present invention. In the present specification, ordinal numbers such as "1 st" and "2 nd" are used to distinguish items to which the ordinal numbers are added, and do not refer to the order, priority, importance, and the like of the items.
Description of the reference numerals
1. 1' sanitary pad (absorbent article)
2 surface sheet
3 Back sheet
4 intermediate sheet
5 Release sheet
6 adhesive layer
7 garment to be worn
8 absorbent body
A11 st adhesive layer
A22 nd adhesive layer
Claims (7)
1. An absorbent article comprising: a surface sheet formed of a nonwoven fabric, a back sheet formed of a hydrophobic nonwoven fabric, and an intermediate sheet positioned between these sheets,
the intermediate sheet is formed of a hydrophobic nonwoven fabric and has a thickness reduction rate due to a load of 4900Pa which is smaller than that of the surface sheet,
a 1 st adhesive layer is disposed between the front sheet and the intermediate sheet, and a 2 nd adhesive layer is disposed between the intermediate sheet and the back sheet,
the 1 st adhesive layer and the 2 nd adhesive layer are arranged such that their arrangement patterns do not overlap in the thickness direction of the absorbent article.
2. The absorbent article according to claim 1, wherein the intermediate sheet has a plurality of joining portions that contain heat-fusible fibers and that join the heat-fusible fibers to each other, and the surface sheet does not contain heat-fusible fibers or contains a smaller amount of heat-fusible fibers than the intermediate sheet.
3. The absorbent article according to claim 1 or 2, wherein the nonwoven fabric constituting the top sheet contains hydrophilic fibers at a mass ratio of 50 mass% or more.
4. The absorbent article according to claim 1, wherein the top sheet has an uneven structure including convex portions protruding on the skin surface side and concave portions recessed on the non-skin surface side.
5. The absorbent article according to claim 4, wherein the convex portion has a cavity portion facing a surface of the topsheet on the non-skin surface side.
6. The absorbent article according to claim 1, wherein the hydrophobic nonwoven fabric constituting the back sheet comprises a microfiber layer composed of fibers having a fineness of 1 dtex or less.
7. The absorbent article according to claim 1, wherein the hydrophobic nonwoven fabric constituting the back sheet is an SMS nonwoven fabric.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015255251A JP5938138B1 (en) | 2015-12-25 | 2015-12-25 | Absorbent articles |
| JP2015-255251 | 2015-12-25 | ||
| PCT/JP2016/053399 WO2017110097A1 (en) | 2015-12-25 | 2016-02-04 | Absorbent article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108472158A CN108472158A (en) | 2018-08-31 |
| CN108472158B true CN108472158B (en) | 2020-11-20 |
Family
ID=56184708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680075750.2A Active CN108472158B (en) | 2015-12-25 | 2016-02-04 | Absorbent article |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5938138B1 (en) |
| CN (1) | CN108472158B (en) |
| TW (1) | TWI715632B (en) |
| WO (1) | WO2017110097A1 (en) |
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| CN1175395A (en) * | 1996-06-28 | 1998-03-11 | 尤尼佳股份有限公司 | Disposable body fluids absorbing article |
| CN1406569A (en) * | 2001-08-31 | 2003-04-02 | 尤妮佳股份有限公司 | Disposable napkin |
| JP2003299694A (en) * | 2002-04-09 | 2003-10-21 | Kao Corp | Disposable diaper |
| CN1618417A (en) * | 2001-06-08 | 2005-05-25 | 尤妮佳股份有限公司 | Absorbing products mfg. method |
| JP2005312526A (en) * | 2004-04-27 | 2005-11-10 | Uni Charm Corp | Absorptive article |
| WO2014204803A1 (en) * | 2013-06-20 | 2014-12-24 | 3M Innovative Properties Company | Stretch release articles and fasteners |
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| JPH04272261A (en) * | 1991-02-22 | 1992-09-29 | Kuraray Co Ltd | Second sheet of hygienic material |
| JP3831819B2 (en) * | 1994-09-08 | 2006-10-11 | 小林製薬株式会社 | Body fluid absorbing pad |
| JP4208379B2 (en) * | 2000-03-13 | 2009-01-14 | 花王株式会社 | Absorbent articles |
| JP2003339761A (en) * | 2001-06-08 | 2003-12-02 | Uni Charm Corp | Absorbent article and method for manufacturing the same |
| JP4164416B2 (en) * | 2003-08-01 | 2008-10-15 | 大王製紙株式会社 | Absorbent article and manufacturing method thereof |
| JP4303143B2 (en) * | 2003-12-25 | 2009-07-29 | ユニ・チャーム株式会社 | Panty liner |
| JP4521268B2 (en) * | 2004-09-30 | 2010-08-11 | 大王製紙株式会社 | Pad-type absorbent article |
| EP1889589B1 (en) * | 2005-06-08 | 2012-06-13 | Kao Corporation | Absorptive article |
| JP5021719B2 (en) * | 2009-12-18 | 2012-09-12 | 花王株式会社 | Non-woven |
| JP5368816B2 (en) * | 2009-02-02 | 2013-12-18 | 花王株式会社 | Absorbent articles |
| JP5769896B1 (en) * | 2014-10-10 | 2015-08-26 | ユニ・チャーム株式会社 | Absorbent articles |
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2015
- 2015-12-25 JP JP2015255251A patent/JP5938138B1/en active Active
-
2016
- 2016-02-04 WO PCT/JP2016/053399 patent/WO2017110097A1/en active Application Filing
- 2016-02-04 CN CN201680075750.2A patent/CN108472158B/en active Active
- 2016-09-20 TW TW105130327A patent/TWI715632B/en active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1175395A (en) * | 1996-06-28 | 1998-03-11 | 尤尼佳股份有限公司 | Disposable body fluids absorbing article |
| CN1618417A (en) * | 2001-06-08 | 2005-05-25 | 尤妮佳股份有限公司 | Absorbing products mfg. method |
| CN1406569A (en) * | 2001-08-31 | 2003-04-02 | 尤妮佳股份有限公司 | Disposable napkin |
| JP2003299694A (en) * | 2002-04-09 | 2003-10-21 | Kao Corp | Disposable diaper |
| JP2005312526A (en) * | 2004-04-27 | 2005-11-10 | Uni Charm Corp | Absorptive article |
| WO2014204803A1 (en) * | 2013-06-20 | 2014-12-24 | 3M Innovative Properties Company | Stretch release articles and fasteners |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017110097A1 (en) | 2017-06-29 |
| TW201726089A (en) | 2017-08-01 |
| TWI715632B (en) | 2021-01-11 |
| JP2017113476A (en) | 2017-06-29 |
| JP5938138B1 (en) | 2016-06-22 |
| CN108472158A (en) | 2018-08-31 |
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