Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F13/00—Bandages or dressings; Absorbent pads
  • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
  • A61F13/45—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 shape
  • A61F13/47—Sanitary towels, incontinence pads or napkins
  • A61F13/475—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means
• • 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
  • A61F13/45—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 shape
  • A61F13/47—Sanitary towels, incontinence pads or napkins
  • A61F13/472—Sanitary towels, incontinence pads or napkins specially adapted for female use
  • A61F13/47236—Sanitary towels, incontinence pads or napkins specially adapted for female use characterised by an unusual contour
  • A61F13/47245—Sanitary towels, incontinence pads or napkins specially adapted for female use characterised by an unusual contour with asymmetry around the x or y axis
• • 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
  • A61F13/45—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 shape
  • A61F13/47—Sanitary towels, incontinence pads or napkins
  • A61F13/476—Sanitary towels, incontinence pads or napkins characterised by encircling the crotch region of the undergarment, e.g. with flaps
• • 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
  • A61F13/551—Packaging before or after use
  • A61F13/5513—Packaging before or after use packaging of feminine sanitary napkins
  • A61F13/55135—Packaging before or after use packaging of feminine sanitary napkins before use
  • A61F13/5514—Packaging before or after use packaging of feminine sanitary napkins before use each item packaged single
• • 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
  • A61F13/551—Packaging before or after use

Definitions

• Sanitary napkins have been used as conventional means which are worn on female bodies for absorbing body fluid.
• the conventional sanitary napkins have constant widths from the front of the body of a wearer to the back thereof.
• Such napkins because of their shape, because of their constant widths, have high production efficiency and are advantageous in material saving. It cannot be said, however that such napkins are not sufficiently preventive for fluid leakage at the rear portions. That is, for a long time use of such napkins in sleeping at night, prevention of fluid leakage at the backward portion of the lying body is a significant problem.
• sanitary napkins having portions thereof corre-sponding to the backward portion of the body of a wearer of the sanitary napkins made wider than the forward portions thereof are used.
• Such sanitary napkins have problems that the sanitary napkins cannot be secured stable to underwear because of the wider rearward portions, the side portions of the rearward portions are turned up in use and jeopardize the long-time leakage prevention.
• the wider portions make the individual packages large, and in packaging the individual napkins with the wider portions folded, it is necessary that the wider portions are kept folded until the packages are completed, which makes their production difficult.
• An object of the present invention is to provide a sanitary napkin which has a wider rearward portion to thereby prevent fluid leakage.
• Another object of the present invention is to provide a sanitary napkin a wider rearward portion of which is stable to effect fluid leakage prevention.
• Another object of the present invention is to provide a sanitary napkin a wider rearward portion of which can be folded stable.
• the sanitary napkin according to the present invention comprises a fluid permeable topsheet disposed on a side of the sanitary napkin, which is to be opposed to the body of a wearer, a fluid impermeable backsheet disposed on a side of the sanitary napkin, which is to be opposed to underwear of the wearer, and an absorbent core disposed between said both sheets, the backsheet having a shape which agrees with a contour of the sanitary napkin and which is substantially elongate from the front to the back of the body of the wearer, and being wider at a rearward portion thereof corresponding to a rearward part of the body of the wearer than at a forward portion thereof corresponding to a forward part of the body of the wearer, the absorbent core being narrower than the forward portion of the backsheet, a first adhesive layer being disposed on a side of the backsheet to be opposed to the underwear in a region where the absorbent core is present, second adhesive layers being disposed on the side of the backsheet
• FIG.l is a top view of the sanitary napkin according to one embodiment of the present invention.
• FIG. 2 is a sectional view of the sanitary napkin of FIG. 1 along the line 11-11.
• FIG. 3 is a top view of the sanitary napkin of FIG. 1 in its folded state.
• FIGs. 1 to 3 show the sanitary napkin according to a first embodiment of the present invention.
• a napkin generally represented by reference number 1 comprises a fluid permeable topsheet 4, a fluid impermeable backsheet 6 and an absorbent core 8. It is important that fluid discharged by the body of a wearer and does not excessive unpleasant touch to the wearer when the topsheet 4 directly contacts the skin of the wearer.
• the topsheet 4 is suitably made of, woven or unwoven fabric of natural fibers or synthetic fibers, thermoplastic synthetic resin film having a number of pores formed in, porous synthetic resin foam, net synthetic foam, net thermoplastic synthetic resin film, thermoplastic synthetic resin scrim or others.
• the backsheet 6 has the function that fluid absorbed by the absorbent core 8 flows out of the napkin to smear the wearer herself and/or her clothes, and is suit ably formed of flexible fluid impermeable thermoplastic synthetic resin film, such as polyolefin film.
• flexible fluid impermeable thermoplastic synthetic resin film such as polyolefin film.
• suitable film of which the backsheet 6 include low- density polyethylene film of 0.01 - 0.05 mm thickness, especially about 0.025 mm thickness (marketed as "MODEL XP 39385" by Ethyl Corp., Visqueen Division, and as "SOFLEXX 1401" by Clopay Corp., Cincinnati, Ohio, U.S.A.).
• the absorbent core 8 disposed intermediate between the topsheet 4 and the backsheet 6 absorbs and holds fluid which has been discharged by the wearer and permeated the topsheet 4.
• the absorbent core 8 is suitably formed of, e.g., finely pulverized pulp so called air felt, creped cellulose-filled cotton, melt blow polymer, chemically rigidified, modified or cross linked cellulose fiber, absorbent synthetic resin foam, tissue paper layer, absorbing gelling material (which absorbs fluid and gels), or suitable combinations of these materials.
• a layer 3 of an adhesive for securing the napkin to the underwear of the wearer is disposed at a position on the outside surface of the backsheet 6, which substantially corresponds to the absorbent core 8.
• the adhesive "Century Adhesive A-305-IV" by Century Adhesive Corp., Columbus, Ohio, U.S.A. is suitably used.
• the layer 3 of an adhesive is provided on the outside surface of the backsheet 6, preferably the adhesive is covered with a sheet of silicone coated paper for preventing the adhesive from contamination before use.
• the topsheet 4 and the backsheet 6 are projected at a little forward (upward as viewed in FIG. 1) beyond the side edge 8a of the absorbent core 8 laterally outward at positions on the lengthwise edges, which are a little offset forward (upward as viewed in FIG. 1).
• the projected portions provide wings of the napkin 2.
• the wings 12 are turned onto the crotch region of underwear when the napkin 2 is used. If necessary, layers 14 of an adhesive for securing the wings to underwear may be disposed on the side of the backsheet 6 to be opposed to the underwear.
• layers 28 of an adhesive a reprovided on portions of the side of the backsheet 6 to be opposed to underwear of a wearer, which (portions) are in the wider portion 16.
• the projected portions of the wider portion 16 are spread inside the underwear of a wearer and adhered to the inside surface of the underwear by the adhesive layers 28.
• the adhesive layers 28 hinder the projected portions of the wider portion 16 from peeling off in contact with the body of the wearer.
• FIG. 3 shows the sanitary napkin according to the embodiment of FIG. 1 with the wing 12 and the projected portions of the wider portion 16 folded.
• the wing 12 and the projected portions of the wider portion 16 are folded on the topsheet 4 .
• the adhesive layers 14 on the wings 12 are covered with a release sheet 30 with a release agent, such as silicone or others applied to the surface, and the left and the right wings are interconnected with each other by the release sheet 30.
• the adhesive layers 28 on the projected portions of the wider portion 16 are also covered with a release sheet 32 with a release agent, such as silicone or others, applied to the surface, and the left and the right projected portions of the wider portion 16 are interconnected with each other by the release sheet.
• the portions which are projected laterally outward beyond the absorbent core 8, i.e., the wings 12 and the projected portions of the wider portion 16, are folded onto the topsheet 4 towards the transverse center of the absorbent core 8 along the side edges 8a, whereby the napkin 2 can have a small width.
• An individual package oft he napkin 12 can be accordingly small.
• the wings 12, and the projected portions of the wider portion 16 can be interconnected by their respective release sheets, whereby it is not necessary to press the wings 12 and the projected portions of the wider portions 16 folded, and the production line can be simple.
• the adhesive layers 3 for securing the napkin body 2 to underwear, and the adhesive layers 16 for preventing the projected portions of the wider portion 16 from peeling off the underwear are separately provided, but in place, the adhesive layers 3 and the adhesive layers 28 may be connected. In any case, it is necessary that adhesive layers are provided on the backside of the backsheet in the projected portions of the wider portion 16, where the absorbent core 8 is absent.
• Various design changes are possible with the scope of the present invention.
• the projected portions of the wider portion of the sanitary napkin which are positioned at rearward portions of the napkin are to be secured to the inside of underwear by means of the adhesive layers, whereby the projected portions of the wider portion are hindered from peeling off the underwear, and stably long contribute to the leakage prevention. Even in a case that because of no absorbent core in the projected portions of the wider portion positioned at t he rearward portion of the sanitary napkin, the projected portions of the wider portion have no sufficient rigidity, there is no risk that the projected portions of the wider portion may peel off.

Landscapes

• Health & Medical Sciences (AREA)
• Epidemiology (AREA)
• Engineering & Computer Science (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Vascular Medicine (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Absorbent Articles And Supports Therefor (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=15185680

Family Applications (1)

Country Status (18)

Families Citing this family (38)

Citations (2)

Family Cites Families (2)

• 1995
  • 1995-06-02 JP JP7136879A patent/JP2974934B2/ja not_active Expired - Lifetime
• 1996
  • 1996-05-09 AU AU57909/96A patent/AU712928B2/en not_active Ceased
  • 1996-05-09 HU HU9901429A patent/HUP9901429A3/hu unknown
  • 1996-05-09 CA CA002223082A patent/CA2223082A1/en not_active Abandoned
  • 1996-05-09 CZ CZ973835A patent/CZ383597A3/cs unknown
  • 1996-05-09 EP EP96914601A patent/EP0830120A4/en not_active Withdrawn
  • 1996-05-09 TR TR97/01485T patent/TR199701485T1/xx unknown
  • 1996-05-09 CN CN96195625A patent/CN1120698C/zh not_active Expired - Lifetime
  • 1996-05-09 WO PCT/US1996/006572 patent/WO1996038110A1/en not_active Application Discontinuation
  • 1996-05-09 KR KR1019970708720A patent/KR100621371B1/ko not_active IP Right Cessation
  • 1996-05-09 BR BR9608536A patent/BR9608536A/pt not_active Application Discontinuation
  • 1996-05-22 ZA ZA964103A patent/ZA964103B/xx unknown
  • 1996-05-30 EG EG46996A patent/EG20715A/xx active
  • 1996-05-30 MY MYPI96002123A patent/MY117843A/en unknown
  • 1996-05-31 AR ARP960102823A patent/AR002164A1/es not_active Application Discontinuation
  • 1996-06-03 CO CO96028600A patent/CO4700393A1/es unknown
  • 1996-08-21 TW TW086219513U patent/TW338314U/zh unknown
• 1997
  • 1997-12-01 NO NO975532A patent/NO975532L/no unknown

Patent Citations (2)

Non-Patent Citations (1)

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