WO2005099640A1 - 生理用ナプキン - Google Patents
生理用ナプキン Download PDFInfo
- Publication number
- WO2005099640A1 WO2005099640A1 PCT/JP2005/006749 JP2005006749W WO2005099640A1 WO 2005099640 A1 WO2005099640 A1 WO 2005099640A1 JP 2005006749 W JP2005006749 W JP 2005006749W WO 2005099640 A1 WO2005099640 A1 WO 2005099640A1
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- WIPO (PCT)
- Prior art keywords
- liquid
- layer
- barrier layer
- sanitary napkin
- sheet
- Prior art date
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Classifications
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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
- A61F13/53743—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 characterised by the position of the layer relative to the other layers
- A61F13/53747—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 characterised by the position of the layer relative to the other layers the layer is facing the topsheet
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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
-
- 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
- A61F13/53704—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 the layer having an inhibiting function on liquid propagation
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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
- A61F13/53708—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 the layer having a promotional function on liquid propagation in at least one direction
- A61F13/53713—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 the layer having a promotional function on liquid propagation in at least one direction the layer having a promotional function on liquid propagation in the vertical direction
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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
- A61F13/53708—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 the layer having a promotional function on liquid propagation in at least one direction
- A61F13/53717—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 the layer having a promotional function on liquid propagation in at least one direction the layer having a promotional function on liquid propagation in the horizontal direction
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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 a sanitary napkin having a high side leakage prevention effect and a high effect of concealing the color of menstrual blood absorbed in a liquid absorbing layer.
- the present invention relates to a sanitary napkin that allows a given liquid to diffuse vertically below a topsheet and quickly absorb the liquid into a liquid absorbing layer.
- Sanitary napkins generally include a liquid-permeable top sheet, a back sheet, and a liquid absorbing layer (absorbing core) disposed between the top sheet and the back sheet.
- the sanitary napkin absorbs menstrual blood quickly and prevents the given liquid from leaking in the horizontal direction!
- the menstrual blood absorbed by the liquid absorbing layer absorbs It is required that it is difficult to return, and it is preferable that the color of menstrual blood absorbed by the liquid absorbing layer is difficult to be seen from the outside.
- surface sheets of various structures and other members disposed between the surface sheet and the liquid absorbing layer have been developed.
- Patent Document 1 discloses a sanitary napkin for the purpose of facilitating the intake of a liquid, improving the function of concealing the color of the liquid by allowing the liquid to return to the surface side of the surface sheet skin, and the like. It has been disclosed. That is, in the sanitary napkin described in Patent Literature 1, the first passage layer (top sheet) located on the skin side surface has large pores with individual pore areas of 1.4 to 3.0 mm 2 .
- the second passage layer which is a fat film and is located below the first passage layer, is formed of a high porosity high loft elastic fiber material. Further, as a structure to be compared with the invention, the same first pass layer is used, but the second pass layer is small, and is replaced by a resin film having holes formed therein. You.
- Patent Literature 2 discloses an absorbent article provided with a second layer between a liquid-permeable surface sheet and a liquid absorbing layer. ing.
- This second layer is a nonwoven fabric having a large number of concave portions formed toward the liquid absorbing layer.
- the recess functions to retain the liquid inside and enhance the effect of preventing leakage in the lateral direction.
- the liquid provided in the recess is diffused in the second layer. In addition, the liquid is prevented from returning to the surface side of the top sheet.
- Patent Document 1 Japanese Patent Publication No. 11-507573
- Patent Document 2 JP 2000-140015
- Patent Document 3 JP-A-55-94251
- Patent Document 4 JP-A-6-38998
- the liquid permeability of the first passage layer is enhanced by the large aperture, and the second passage layer made of a fiber material is provided between the first passage layer and the liquid absorption layer. It is located. Therefore, when body pressure acts on the skin-side surface, the menstrual force absorbed by the liquid absorbing layer easily passes through the second passage layer and returns to the skin-side surface of the first passage layer through a larger opening. In addition, since menstrual blood can be retained in the space of the second passage layer, the color of the menstrual blood can be seen through a large opening in the first passage layer.
- a resin film having small openings formed as a second passage layer is disposed below the first passage layer. It is considered that the second passage layer makes it possible to make the color of menstrual blood absorbed by the liquid absorbing layer less visible to external force. Under pressure, this second permeable layer also acts as a resistance to menstrual flow after passing through the first permeable layer and toward the liquid absorbing layer. Therefore, menstrual blood stays between the first passage layer and the second passage layer, and menstrual blood that has just stayed there easily spreads along the surface between the first passage layer and the second passage layer. Therefore, it is easy to cause lateral leakage. Furthermore, the retained menstrual blood tends to return to the skin-side surface of the first passage layer through the large opening.
- the liquid that has passed through the topsheet is temporarily held in the concave portion of the second layer formed of the nonwoven fabric, and thereafter, It passes through the second layer and is absorbed by the liquid absorption layer.
- the second layer temporarily stores the urine in the recess. It functions as a material that allows urine to pass between fibers and is absorbed by the liquid absorbing layer.
- menstrual blood having a relatively high viscosity does not easily pass between the fibers of the second layer, so This makes it difficult for the liquid to remain on the skin-side surface of the topsheet.
- the liquid absorption layer force reduces the return of the liquid toward the surface sheet, and the menstrual blood absorbed by the liquid absorption layer The effect of hiding the color of the image can be enhanced.
- each component of the near layer is in contact with the surface sheet and the liquid absorbing layer.
- the components may be completely separated from each other, or may be partially connected at vertically spaced positions.
- the barrier layer has a two-layer structure, and the upper barrier layer is located on the lower barrier layer.
- the components of the lower barrier layer are provided below the liquid passage area formed between the adjacent components of the upper barrier layer. It is even more preferable that the upper and lower layers are arranged differently from each other so that the layers are located.
- a corrugated sheet is disposed between the topsheet and the liquid absorbing layer, and functions as a nomination layer at the top.
- menstrual blood that has passed through the topsheet flows in the longitudinal direction of the sanitary napkin along the concave portion of the corrugated sheet, and is immediately absorbed by the liquid absorbing layer.
- an opening is formed in the corrugated sheet for the passage of liquid.
- the corrugated sheet may have a larger liquid permeation hole than the top sheet so that menstrual blood in the concave portion is quickly absorbed by the liquid absorbing layer.
- the sanitary napkin and each element thereof have two main surfaces, of which the surface worn toward the crotch of the wearer is referred to as the “skin-side surface”, and the opposite surface is referred to as the “clothes-side surface”. It is called “surface”.
- FIG. 1 is a plan view showing the sanitary napkin 1 according to the first embodiment of the present invention with the skin side surface facing forward
- FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1
- FIG. Fig. 4 is a partial perspective view schematically showing how the topsheet and one barrier layer are arranged on the liquid absorbing layer
- Fig. 5 is an enlarged photograph of the skin side surface of the sanitary napkin 1. It is.
- the sanitary napkin 1 has a longitudinal center line Oy that is long in the Y direction (longitudinal direction). It has a main body part that is symmetrical through the left and right.
- the body has a leading edge la and a trailing edge lb, each of which curves (projects) back and forth.
- the wings 2 and 2 protrude outward from both left and right sides of the main body.
- the wings 2 and 2 are provided at a position closer to the front edge la than the rear edge lb which is not concentric with the horizontal center line Ox.
- the main body includes a front right edge lc and a front left edge Id in front of the wings 2 and 2, and a rear right edge le and a rear left rim behind the wings 2 and 2. Has If.
- the sanitary napkin 1 is basically composed of a liquid-permeable surface sheet 5 that appears on the skin-side surface of the sanitary napkin 1 and a liquid that appears on the clothing-side surface of the sanitary napkin 1. It comprises a back sheet 6 having a barrier property, and a liquid absorbing layer 7 disposed between the top sheet 5 and the back sheet 6. As shown by the broken line in FIG. 1, the liquid absorbing layer 7 curves (projects) forward and separates inwardly from the leading edge la of the sanitary napkin 1, and curves (projects) backward to remove the physiological And a trailing edge 7b inwardly spaced from the trailing edge lb of the napkin 1.
- the liquid absorbing layer 7 includes a right edge 7c which is spaced inward from the front right edge lc and the rear right edge le of the sanitary napkin 1, and a front left edge Id and a rear left edge of the sanitary napkin 1. And a left edge 7d inwardly spaced from the If. Outside the liquid absorption layer 7, the top sheet 5 and the back sheet 6 are bonded with a hot melt adhesive.
- an additional liquid impermeable side sheet is provided on the skin side surface of the sanitary napkin 1 at a predetermined distance from the longitudinal center line Oy so as to cover both left and right sides. It may be.
- the side sheet may form a leak-proof wall (cuff) that extends in the vertical direction and rises from the skin-side surface.
- a region surrounded by a broken line is referred to as a main liquid receiving region 10.
- the main liquid receiving region 10 is symmetric with respect to both the vertical center line Oy and the horizontal center line Ox, and has a length dimension L1 and a width dimension W1.
- a barrier layer 11 is disposed between the top sheet 5 and the liquid absorbing layer 7.
- the barrier layer 11 also acts as a plurality of strip-shaped components (strips), each of which has a width dimension in the X direction (transverse direction Z transverse direction) of the sanitary napkin 1.
- the main liquid receiving region 10 extends continuously over the length dimension L1.
- This component is made of a resin film.
- Fig. 4 does not show the three components. Four or more elements are spaced apart in the X direction to provide a primary liquid receiving area 10. If necessary, individual components may be shorter than the length dimension L1 of the main liquid receiving region 10.
- a liquid passage area 12 is defined between adjacent components.
- Each liquid passage area 12 has a width dimension Wb in the X direction, and extends continuously over the length dimension L1 of the main liquid receiving area 10. That is, the components of the barrier layer 11 are separated by the distance Wb in the X direction.
- the length L1 and the width L1 of the main liquid receiving area 10 are set so that the main liquid receiving area 10 can easily face the vaginal opening.
- W1 is determined.
- the preferred range of the length dimension L1 is (but not limited to) 40 to 70 mm, and the preferred range of the width dimension W1 is (not limited to 20 to 30 mm force). It is.
- the width dimension Wb of each of the liquid passage areas 12 is, for example, 0.5 to: LOmm, preferably 1 to 8 mm, and more preferably 3 to 8 mm.
- the width dimension Wb may be the same as the width dimension Wa of each constituent element of the near layer 11, or may be smaller or larger than the width dimension Wa.
- the total area of the liquid passage area 12 is 5 to 70% of the area (LlxWl) of the main liquid receiving area 10.
- the width Wb is preferably equal to or less than the width Wa.
- the total area of the liquid passage area 12 may be 25 to 50% of the area (LlxWl) of the main liquid receiving area 10. preferable.
- the presence of the non-aqueous layer 11 can effectively prevent menstrual blood absorbed by the liquid absorbing layer 7 from returning to the topsheet 5 and also prevent the menstrual blood absorbed by the liquid absorbing layer 7 Can be effectively hidden by the barrier layer 11 and the topsheet 5. Further, the liquid passage area 12 facilitates absorption of menstrual blood into the liquid absorbing layer 7.
- the topsheet 5 is formed of an open synthetic resin film, that is, a synthetic resin film in which a large number of liquid permeable holes 5a are arranged regularly or randomly. Being done. Also, an apertured synthetic resin film is used for the barrier layer 11. Therefore, a number of liquid permeation holes 1 la are regularly or randomly arranged in each constituent element of the near layer 11! RU
- each liquid permeable hole 5 a in the topsheet 5 is equal to the opening surface of each liquid permeable hole 11 a in each component of the barrier layer 11. Is larger than the product (preferably 1.5 to 10 times, and more preferably 2 to 6 times), and the open area ratio of the surface sheet 5 by the liquid permeation holes 5a. (Preferably 1.5 to 10 times, more preferably 2 to 6 times).
- the arrangement pitch of the liquid transmission holes 5a and the arrangement pitch of the liquid transmission holes 11a do not match in both the vertical and horizontal directions.
- FIG. 5 is an enlarged photograph of the main liquid receiving region 10 actually created according to the first embodiment. When viewed from above the skin side surface, the overlapping portion of the liquid permeation hole 5a and the liquid permeation hole 1 la is appropriately distributed in the main liquid receiving area 10.
- the same perforated resin film may be used for the topsheet 5 and the barrier layer 11.
- This resin film is stretched for the surface sheet 5 so that both the individual opening area and the opening area ratio are increased. That is, in FIG. 5, the resin film is stretched in the X direction, and the liquid permeable holes 5a are elongated in the X direction.
- the barrier layer 11 the resin film can be used without being stretched.
- the components of the layer 11 are thicker than the topsheet 5, and the liquid passage area 12 defined between the adjacent components of the barrier layer 11 is a groove having the same depth as the component.
- This groove functions to guide menstrual blood in the Y direction, and causes menstrual blood to be rapidly absorbed by the liquid absorbing layer 7.
- the grooves also serve to prevent menses from leaking in the X direction.
- liquid passage hole 11a is pore diameter is 0. 3 to 3. 5 mm (preferably 1. 0 to 2. 5 mm), each opening area 0. 07 ⁇ 9. 61mm 2 (preferably 0. 78 to 4.91 mm 2 ).
- Each component of the layer 11 has an opening area ratio of 20 to 60% (preferably 35 to 50%) due to the liquid permeation hole 11a, and a thickness of 0.15 to: L Omm (preferably). Is 0.3 to 0.7 mm). It is preferable that the same resin film used for the barrier layer 11 is stretched to 1.5 to 4 times the original length of the topsheet 5.
- the liquid-permeable holes can be formed by a perforation method in which a resin film is softened on a substrate having a large number of holes and air is sucked from the back side of the substrate.
- a perforation method as shown in FIG. 3, each liquid permeation hole 11a gradually narrows toward the liquid absorption layer 7, and the surface of the resin film on the clothing side protrudes a ring (short cylindrical shape). Body) l ib is formed.
- each liquid permeation hole 5a is also gradually narrowed toward the liquid absorption layer 7, and a ring (short cylindrical body) 5b is formed in which the clothing-side surface force of the resin film also protrudes.
- Thermoplastic resin materials suitable for the topsheet 5 and the barrier layer 11 are LLDPE (linear low-density polyethylene), LDPE (low-density polyethylene), HDPE (high-density polyethylene), and PP (polypropylene). , Including Tuffmer (registered trademark) manufactured by Mitsui Iridaku Co., Ltd., and a mixture thereof. The present invention is not limited to this. These resin materials may also be combined to form a multilayer film. An inorganic filler such as titanium oxide, barium sulfate, or calcium carbonate may be kneaded in the resin material in a range of 10 to 40% by mass to whiten the resin film.
- LLDPE linear low-density polyethylene
- LDPE low-density polyethylene
- HDPE high-density polyethylene
- PP polypropylene
- the resin material used for the surface sheet 5 and the barrier layer 11 may be subjected to a hydrophilic treatment by giving a hydrophilic agent such as an ester in an amount of 0.1 to 2.5% by mass.
- the back sheet 6 is formed of a liquid barrier sheet such as a PE (polyethylene) resin film.
- the liquid absorption layer 7 is formed by wrapping a mixture of ground pulp and a superabsorbent polymer (SAP) with a tissue paper.
- SAP superabsorbent polymer
- component liquid absorbent layer 7 of barrier further 11 are bonded by applying the hot-melt adhesive in the range of. 1 to 10 g / m 2 RU
- the back sheet 6 is also bonded to the liquid absorbing layer 7 with a hot melt type adhesive.
- the sanitary napkin 1 When worn, the sanitary napkin 1 is placed on the inner surface of the crotch portion of the underwear, and the pressure-sensitive adhesive layer provided on the clothing-side surface (back sheet 6) of the sanitary napkin 1 body is used for the sanitary napkin 1. It is fixed to the crotch.
- the wings 2 and 2 are folded back, and are adhered to the outer surface of the crotch of the underwear by a pressure-sensitive adhesive layer provided on the clothing side surface (back sheet 6) of the wings 2 and 2.
- the main liquid receiving area 10 faces the vaginal opening, and the menstrual blood from which the vaginal loci have been discharged is mainly given to the main liquid receiving area 10. .
- Menstrual blood given to the main liquid receiving area 10 passes through the relatively large liquid permeable holes 5a of the topsheet 5, and mainly In the liquid passage area 12, the liquid absorbing layer 7 comes into contact with the liquid absorbing layer 7 and is absorbed by the liquid absorbing layer 7 by its hydrophilicity. As shown in FIG.
- a part of the menstrual blood given to the main liquid receiving area 10 has a liquid permeation hole 5a and a liquid permeation hole 1 la. And reaches the liquid absorbing layer 7 through the overlapping portion of the.
- the surface sheet 5 since the surface area ratio of the surface sheet 5 is relatively high and the individual hole areas of the liquid permeable holes 5a are relatively large, a given liquid is applied to the surface sheet 5. Less likely to remain on skin side surface. Further, as shown in FIG. 5, the surface sheet 5 overlaps the constituent elements of the near layer 11 to reduce the area of the liquid absorbing layer 7 exposed to the outside through the liquid permeable holes, so that the liquid absorbing layer The menstrual blood absorbed by the liquid 7 is returned to the skin side surface of the topsheet 5, and the color of the menstrual blood absorbed by the liquid absorbing layer 7 becomes visible from the outside.
- FIG. 6, corresponding to FIG. 3, is a partially enlarged cross-sectional view showing a sanitary napkin 1A which is a modification of the first embodiment.
- two barrier layers 11 and 11 are provided in two layers between the top sheet 5 and the liquid absorbing layer 7! / ⁇ . You.
- the liquid passage area defined between adjacent components of the upper barrier layer 11 is indicated by 12a, and the liquid passage area defined between adjacent components of the lower barrier layer 11 is indicated by 12b.
- the components extend in the Y direction on both the upper and lower barrier layers 11, 11 and are spaced apart in the X direction.
- the upper component of the lower layer 11 is located below the liquid passage area 12a, and the upper component of the upper layer 11 is located above the liquid passage area 12b.
- the barrier layer 11 and the lower layer 11 are shifted in the X direction.
- a component of the near layer 11 has a liquid permeation hole 1 la from which the ring ib projects toward the liquid absorbing layer 7 by the perforation method. Since at least the upper barrier layer 11 has a ring of 1 lb, a gap “h”, which is the sum of the height of the ring lib and the thickness of the resin film, is formed between the topsheet 5 and the lower barrier layer 11. Formed.
- the upper and lower barrier layers 11 and 11 thus stacked are more effective in preventing menstrual blood absorbed by the liquid absorbing layer 7 from returning to the surface sheet 5 and the skin side surface.
- the color of the menstrual blood absorbed in the absorbent layer 7 is made visible by the external force. Even in this case, menstrual blood given to the main liquid receiving area 10 can quickly reach the liquid absorbing layer 7 due to the presence of the liquid passing areas 12a and 12b alternated in the X direction.
- FIG. 7 is a partially enlarged perspective view showing a barrier layer 11A which is a modification of the barrier layer 11 used in the embodiment.
- the nomination layer 11A also has a plurality of constituent elements each having a resin film layer 13 and a fiber layer 14 bonded to the resin film 13 layer.
- the resin film layer 13 is whitened and hydrophilically treated similarly to the barrier layer 11 of the above embodiment.
- Liquid lamination hole 1 la is also formed in near layer 11A.
- the liquid permeation hole 11a may penetrate only the resin film layer 13 or may penetrate both the resin film layer 13 and the fiber layer 14.
- the fiber layer 14 is a hydrophilic nonwoven fabric, and the fiber layer 14 is bonded to the resin film layer 13 by adhesion and heat fusion.
- the fiber layer 14 can be made to have a dot-shaped embossed portion which is thermally fused to the resin film layer 13.
- Fibers suitable for the fiber layer 14 are synthetic resin fibers that have been subjected to hydrophilic treatment, such as PE, PP, and PET (polyethylene terephthalate).
- the fiber layer 14 may further contain cellulosic fibers.
- FIG. 8 is an enlarged plan view showing a barrier layer 11B as still another modification.
- the barrier layer 11B also has a plurality of component forces whose width dimensions change. In this component, the wide portions and the narrow portions alternate in the Y direction. Therefore, even in the liquid passage area 12d defined between the components of the adjacent barrier layer 11B, the wide portions and the narrow portions alternate in the Y direction.
- FIGS. 9 and 10 show a sanitary napkin 1B and a sanitary napkin 1D which are modified examples of the above embodiment.
- the barrier layer 11 is clearly shown.
- the components of the barrier layer 11 are relatively large in the central region extending at a predetermined width along the longitudinal center line Oy, and the interval Wd is relatively large. Outside the area there is a relatively small spacing We. That is, the liquid passage area 12 located in the central area has a width dimension Wd, which is larger than the width dimension We of the liquid passage area 12 located outside the central area.
- the sanitary napkin 1B menstrual blood that has passed through the topsheet 5 is guided to the liquid absorbing layer 7 more quickly in the central region than in the rest of the main liquid receiving region 10.
- the liquid passage area 12 located in the central area has a width Wf, which is smaller than the width Wg of the liquid passage area 12 located outside the central area. Is also small.
- the width dimensions Wd and Wg are in the range of 0.5 or more to 10 mm, and preferably 1 to 5 mm.
- the widths We and Wf are smaller than the widths Wd and Wg, but are at least 0.5 mm.
- the liquid passage area 12 may have different width dimensions, and may gradually increase or decrease according to the distance in the X direction from the vertical center line Oy.
- the width dimension force of each component may be changed in the same manner as the S barrier layer 11B.
- the components are completely separated from each other, and a single liquid passage area is defined between them.
- the components are connected to each other, and each liquid passage area is divided into two or more. May be vertically divided into different areas.
- FIG. 11 is an enlarged sectional view corresponding to FIG. 3 and showing a sanitary napkin 101 according to a second embodiment of the present invention
- FIG. 12 is a partially enlarged perspective view corresponding to FIG. .
- the sanitary napkin 101 of the second embodiment has an aperture sheet 110 between the top sheet 5 and the liquid absorbing layer 7.
- the aperture sheet 110 is subjected to a whitening treatment and a hydrophilic treatment similarly to those used for the components of the near layer 11 of the first embodiment, and further has a plurality of liquid permeable holes 1 la. It is formed from the formed resin film.
- the area of each of the liquid-permeable holes 11a of the aperture sheet 110 is smaller than the area of each of the liquid-permeable holes 5a of the topsheet 5. Also, through the liquid permeation hole 5a Smaller than the opening area ratio of the topsheet 5.
- the aperture sheet 110 is corrugated as shown in FIG.
- the aperture sheet 110 has a substantially flat top, which contacts the topsheet 5 and serves as a component of the barrier layer 111.
- a liquid passage area 112 is defined between the components (substantially flat tops) of the adjacent barrier layers 111, in which the aperture sheet 110 is separated from the topsheet 5, and the liquid absorption area is formed at the bottom of the recess.
- the sanitary napkin 101 is guided to the concave portion of the menstrual force perforated sheet 110 that has passed through the liquid permeable holes 5 a of the topsheet 5. Menstrual blood flowing in the Y direction along the bottom of the concave portion is attracted by the hydrophilic force of the liquid absorbing layer 7, passes through the liquid permeable hole 11 a, is absorbed by the liquid absorbing layer 7 and held.
- the liquid passage area 112 functions as preventing menstrual blood from leaking sideways.
- the perforated sheet 110 is placed under the topsheet 5, so that menstrual blood absorbed by the liquid absorbing layer 7 is hard to return to the topsheet 5, and The color of the blood is hard to see the external force.
- FIG. 13 is a partially enlarged perspective view showing a sanitary napkin 101A as a modified example of the second embodiment.
- this sanitary napkin 101A another aperture sheet 110A is interposed between the aperture sheet 110 and the liquid absorbing layer 7.
- the aperture sheet 110A is corrugated, and the convex portions 11la and the concave portions 112a alternate in the Y direction and extend continuously in the X direction.
- the aperture sheet 110A in which the liquid permeation holes are represented by 113 may be the same resin film as the aperture sheet 110 positioned thereon.
- the opening area of each of the liquid permeable holes 113 of the aperture sheet 110A is larger than the individual opening area of the liquid permeable holes 11a of the aperture sheet 110, and
- the opening area ratio is preferably larger than the opening area ratio of the opening sheet 110 formed by the liquid permeation holes 11a.
- menstrual blood that has passed through the liquid permeation hole 11a is given to the aperture sheet 110A below it, and passes through the liquid permeation hole 113 of the aperture sheet 110A to the liquid absorption layer 7. Absorbed.
- the sanitary napkin 101A also contributes to preventing menstrual blood from returning from the liquid absorbing layer 7 to the topsheet 5 and hiding the color of the menstrual blood absorbed by the liquid absorbing layer 7.
- FIG. 14A is a partial perspective view showing a preferred structure of the aperture sheet 110.
- the aperture sheet 110 shown in (A) is a corrugated resin film in which the liquid permeation holes 11a are formed in advance, and sandwiched between embossing rolls in a state of being interlocked with each other to form a corrugated film.
- the corrugated shape is formed by the enbossing process, the film and the opening formed therein are stretched on the side wall of the convex portion (side wall of the concave portion), and the opening lid is formed.
- Each of the openings lid can have a larger opening area than each of the liquid permeable holes 11a remaining at the top of the projection and the bottom of the depression.
- the opening lid facilitates the movement of menstrual blood from the liquid passage area 112 to the liquid absorption layer 7. Since the liquid permeation hole 11a remaining at the top of the projection or the bottom of the depression is not extremely widened, the color of menstrual blood absorbed by the liquid absorption layer 7 can be effectively hidden.
- FIG. 14 (B) shows a perforated sheet 110B, which is obtained by bonding the hydrophilic fiber layer 14 of FIG. 7 to the clothing side surface of the perforated sheet 110 of FIG. 14 (A). It is. Since the hydrophilic fiber layer 14 is exposed at the opening lid, menstrual blood in the liquid passage area 112 is attracted from the opening lid by the hydrophilic force of the fiber layer 14, and the liquid absorbing layer is quickly absorbed. Go to 7
- FIGS. 15 to 17 is a partial perspective view showing a modified example of the aperture sheet arranged below the topsheet 5 in the second embodiment.
- FIG. 15 shows a perforated sheet 210, which is formed of a resin film having a large number of liquid permeable holes 1 la similarly to the barrier layer 11 and the perforated sheet 110.
- the aperture sheet 210 has a plurality of recesses (recesses) 212 which are elongated in the Y direction and are alternately arranged as shown in FIG. Of the aperture sheet 210, the concave portion 212 functions as a liquid passage area, and the rest is called a barrier layer 211.
- a liquid is formed on the side wall of the concave portion 212 in the same manner as described with reference to FIG. 14 (A).
- a plurality of openings larger than the transmission hole 11a can be formed.
- the hydrophilic fiber layer 14 is bonded to the clothing side surface of the aperture sheet 210, and the larger opening is formed on the side wall of the concave portion 212.
- the fiber layer 14 may be exposed.
- FIG. 16 shows a sheet 310, which is formed of a resin film which has been subjected to a whitening treatment and a hydrophilic treatment.
- the resin film has the liquid permeable holes 1 la.
- the sheet 310 has a plurality of recesses (recesses) 312, which are elongated in the Y direction and are staggered as shown in FIG. Openings (elongated holes) 313 that extend long in the Y direction are formed in the left and right side walls of each of the recesses 312.
- the opening 313 has individual opening areas sufficiently larger than the liquid permeable holes 5a and 11a, and has a length of 1Z2 or more, which is the length of the recess 312 in the Y direction.
- the concave portion 312 functions as a liquid passage area, and the rest is referred to as a barrier layer 311.
- Menstrual blood that has passed through the liquid permeation hole 5a of the topsheet 5 flows in the Y direction in the recess 312, passes through the opening 313, and is absorbed by the liquid absorbing layer 7.
- FIG. 17 shows a sheet 310A, in which a hydrophilic nonwoven fabric 314 is bonded to the clothing-side surface of the sheet 310 in FIG.
- This nonwoven fabric 314 can be a liquid-permeable air-through nonwoven fabric formed of synthetic resin fibers that have been subjected to hydrophilic treatment. If necessary, the nonwoven fabric 314 may include cellulosic fibers. Since the nonwoven fabric 314 appears at the opening 313, the nonwoven fabric 314 is attracted to the menstrual force nonwoven fabric 314 in the concave portion 312 and can be transferred to the liquid absorption layer 7.
- the width of the liquid passage area 112 of the aperture sheet 110 shown in FIGS. 11 and 12, the liquid passage area (recess 212) shown in FIG. 15, and the liquid passage area (recess 312) shown in FIGS. 16 and 17 The preferred range of dimensions is the same as Wb shown in FIGS. Further, as described with reference to FIGS. 9 and 10, the liquid passage area may have different widths depending on the distance of the vertical center line Oy force in the X direction.
- FIG. 18 is a plan view showing a sanitary napkin 40 having another structure of the present invention.
- the sanitary napkin 40 further includes longitudinal compression grooves 41, 41 overlapping the left and right sides of the main liquid receiving region 10 with the barrier layer 11 present, and is separated from the front and rear of the main liquid receiving region 10. It has located lateral compression grooves 42,42.
- Resin fill with PE polyethylene
- PE polyethylene
- a large number of liquid-permeation holes were formed by forming a liquid through a perforation method.
- the resin film had a basis weight of 27 gZm 2 , the opening area of each liquid permeation hole in the resin film was 0.3 mm 2 , and the opening area ratio of the resin film due to the liquid permeation holes was 25%. This was used as the basic aperture film.
- the basic aperture film was cut into strips having a width dimension Wa of 3 mm. These strips were arranged as shown in FIGS. 3 and 4 to form a barrier layer 11. The distance Wb between adjacent strips was 2 mm. That is, the width dimension of the liquid passage area 12 was 2 mm as described above.
- the basic apertured film was stretched in the X direction to 200% of its original length, and used as a surface sheet 5.
- the liquid permeable holes were stretched in the X direction.
- basis weight of pulverized pulp 500gZm 2 basis weight creates a liquid absorbent layer 7 wrapped in Tissue Bae over pa 15gZm 2.
- the back sheet 6 was a PE film having a basis weight of 23.5 gZm 2 .
- Example 1 was created as having the same structure as shown in FIGS.
- the base aperture film was corrugated as shown in FIGS.
- the width of the almost flat top of the non-layer 111 was 3 mm
- the width of the liquid passage area 112 was 2 mm
- the depth of the recess was 2. Omm.
- a 0.5 mm clearance was provided between the embossing rolls so that the apertures of the apertured film were not crushed.
- the two barrier layers 11 and 11 are vertically stacked, and the components of the lower barrier layer 11 are located below the liquid passage area 12a defined between the components of the upper barrier layer 11. I did it.
- the basic aperture film was cut into strips having a width Wa of 3 mm.
- the width Wb of the liquid passage areas 12a and 12b is 2 mm.
- Other components are the same as those in the first embodiment.
- the basic aperture film was used as the topsheet 5.
- an air-through nonwoven fabric (basis weight 20 gZm 2 ) formed of a core-in-sheath type composite synthetic fiber (4.4 dtex, average fiber length 5 lmm) with a core of PP and a sheath of PE , Thickness 0.5 mm).
- the basic aperture film was used as the topsheet 5.
- the basic perforated film was also arranged between the top sheet 5 and the liquid absorbing layer 7 without cutting the strip into strips.
- the basic apertured film was stretched in the X direction to 200% of its original length in the same manner as in Example 1, and used as the topsheet 5.
- the sanitary napkins of Examples 1 to 3 and Comparative Examples 1 to 3 were arranged on a plane with the skin side surface facing upward, and artificially applied to a region (main liquid receiving region 10) in which the layers were sequentially laminated. The menstrual drip was repeated four times using an autopuret.
- artificial menstrual blood was prepared by adding 300 g of glycerin, 30 g of sodium salt of carboxymethylcellulose, and 40 g of sodium salt of sodium chloride to 4 liters of ion-exchanged water, stirring the solution, and stirring the solution. And obtained by coloring.
- a filter paper and an acrylic plate were placed on the skin side surface of the sample, and a 5 kg weight was placed on the acrylic plate. After standing for 3 minutes, the filter paper, the acrylic plate and the weight were removed, and the color difference ( ⁇ E) between the white color and the color of the surface provided with artificial menstrual blood was measured using a color difference meter.
- FIG. 1 is a plan view showing a sanitary napkin according to a first embodiment of the present invention
- FIG. 2 is a cross-sectional view of the sanitary napkin shown in FIG.
- FIG. 3 is a partially enlarged view of FIG. 2,
- FIG. 4 is a partial perspective view schematically showing how the topsheet and one barrier layer are arranged on the liquid absorbing layer.
- FIG. 7 is an enlarged perspective view showing a modification of the barrier layer.
- FIG. 8 is an enlarged plan view showing a modification of the barrier layer.
- FIG. 14] (A) and (B) are partial perspective views showing a preferred structure of the aperture sheet according to the second embodiment. [15] Perspective views showing a modification of the aperture sheet according to the second embodiment.
- ⁇ 16 A perspective view showing a modified example of the aperture sheet of the second embodiment.
- FIG. 18 is a plan view showing a sanitary napkin having another structure of the present invention.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004119854A JP2005296480A (ja) | 2004-04-15 | 2004-04-15 | 生理用ナプキン |
JP2004-119854 | 2004-04-15 |
Publications (2)
Publication Number | Publication Date |
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WO2005099640A1 true WO2005099640A1 (ja) | 2005-10-27 |
WO2005099640A9 WO2005099640A9 (ja) | 2005-12-08 |
Family
ID=35097222
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/006749 WO2005099640A1 (ja) | 2004-04-15 | 2005-04-06 | 生理用ナプキン |
Country Status (4)
Country | Link |
---|---|
US (1) | US20050234417A1 (ja) |
JP (1) | JP2005296480A (ja) |
TW (1) | TWI256300B (ja) |
WO (1) | WO2005099640A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007130817A (ja) * | 2005-11-08 | 2007-05-31 | Kao Corp | 複合シート、その製造方法及び装置 |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
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TW200936108A (en) * | 2008-02-29 | 2009-09-01 | Chen-Cheng Huang | Thin-layer with liquid diversion function |
US20100121298A1 (en) * | 2008-11-10 | 2010-05-13 | Tredegar Film Products Corporation | Transfer layer for absorbent article |
US20110264067A1 (en) * | 2010-04-23 | 2011-10-27 | Ilse Rubio | Feminine hygiene pads |
IT1403062B1 (it) * | 2010-06-15 | 2013-10-04 | Gdm Spa | Metodo di piegatura di assorbenti igienici. |
US20120136329A1 (en) * | 2010-11-30 | 2012-05-31 | Sca Hygiene Products Ab | Absorbent article with an acquisition distribution layer with channels |
US20130143726A1 (en) * | 2010-12-09 | 2013-06-06 | Everyday Haute, Llc | System and method for forming ruffles on a web |
JP6037606B2 (ja) * | 2011-09-30 | 2016-12-07 | ユニ・チャーム株式会社 | 吸収性物品、吸収性物品のトップシートおよびそのトップシートの製造方法 |
WO2013129325A1 (ja) * | 2012-02-29 | 2013-09-06 | ユニ・チャーム株式会社 | 吸収性物品 |
JP5963639B2 (ja) | 2012-02-29 | 2016-08-03 | ユニ・チャーム株式会社 | 吸収性物品 |
CN106880446A (zh) * | 2017-03-15 | 2017-06-23 | 君临天下(天津)电子商务有限公司 | 一种壳聚糖纤维包覆粘黏卫生棉垫 |
US10813797B2 (en) * | 2017-06-22 | 2020-10-27 | The Procter & Gamble Company | Laminate webs and absorbent articles having the same |
JP7164995B2 (ja) * | 2018-08-30 | 2022-11-02 | 株式会社リブドゥコーポレーション | 吸収性物品 |
WO2020089980A1 (ja) * | 2018-10-29 | 2020-05-07 | ユニ・チャーム株式会社 | 生理用タンポン |
JP2023501545A (ja) * | 2019-11-14 | 2023-01-18 | フィテサ フィルム プロダクツ エルエルシー | 吸収性物品向けの流体分配材料 |
GB2600411A (en) * | 2020-10-27 | 2022-05-04 | Joii Ltd | Absorbent articles |
CN115120415A (zh) * | 2022-06-27 | 2022-09-30 | 福建恒安集团有限公司 | 一种具有高导流效果的纸尿裤 |
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JPH0490321U (ja) * | 1990-11-30 | 1992-08-06 | ||
US6610904B1 (en) * | 2000-09-22 | 2003-08-26 | Tredegar Film Products Corporation | Acquisition distribution layer having void volumes for an absorbent article |
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- 2005-03-29 TW TW094109804A patent/TWI256300B/zh not_active IP Right Cessation
- 2005-04-01 US US11/097,494 patent/US20050234417A1/en not_active Abandoned
- 2005-04-06 WO PCT/JP2005/006749 patent/WO2005099640A1/ja active Application Filing
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JPH06506372A (ja) * | 1991-04-18 | 1994-07-21 | スミス アンド ネフュー ピーエルシー | 衛生吸収具 |
JPH067724U (ja) * | 1991-11-29 | 1994-02-01 | 淑莉 李 | さじ形の夜間及び産褥期用の生理ナプキンパッド |
JPH08511706A (ja) * | 1993-06-28 | 1996-12-10 | ザ、プロクター、エンド、ギャンブル、カンパニー | 流動体分布方向づけ手段を備えた吸収性物品 |
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Also Published As
Publication number | Publication date |
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WO2005099640A9 (ja) | 2005-12-08 |
JP2005296480A (ja) | 2005-10-27 |
TWI256300B (en) | 2006-06-11 |
TW200534833A (en) | 2005-11-01 |
US20050234417A1 (en) | 2005-10-20 |
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