Panty type diaper (brief-type diaper)

• US 20050131365A1
• Filed: 11/22/2004
• Published: 06/16/2005
• Est. Priority Date: 05/22/2002
• Status: Active Grant

• Current Assignee: Unicharm Corporation
• Original Assignee: Unicharm Corporation
• Inventors: Sakaguchi, Satoru
• Granted Patent: US 7,083,604 B2
• Time in Patent Office: Days
• US Class Current: 604/367
• CPC Class Codes: A61F 13/49011 the elastic means is located at the waist region
• CPC Class Codes: A61F 13/49017 the elastic means being located at the crotch region
• CPC Class Codes: A61F 13/496 in the form of pants or briefs

Abstract

A brief-type diaper for babies, adults and incontinent persons. A brief-type diaper comprises an outer layer sheet constituting an enclosure, an inner layer sheet touching a wearer, a humor absorber, an elastic member for spreading/shrinking a part of respective sheets, and a pair of leg openings for passing the legs of the wearer. The outer layer sheet has a substantially circular external shape, the elastic member is stretched on the upper surface of the outer layer sheet along the outer circumferential fringe thereof while being elongated previously, an inner layer sheet having shape and size substantially identical tot hose of the outer layer sheet is compounded on the upper surface of the outer layer sheet and the elastic member, and the absorber is disposed substantially in the central area on the upper surface of the inner layer sheet. With such an arrangement, a brief-type diaper having no joint in the girth area and in which the elastic member shrinks to form a waist opening can be obtained.

Claims

1. A brief-type diaper having an outer layer sheet constituting an exterior, an inner layer sheet which comes into contact with a wearer, an absorbent for absorbing body fluids, an elastic member for causing portions of the outer and inner sheets to contract and extend, and a pair of leg openings through which the wear'"'"'s legs penetrate, wherein

the absorbent is arranged such that at least a portion of the absorbent is located between the pair of leg openings;

and either the outer layer sheet or the inner layer sheet or both outer and inner layer sheets are formed from members which are seamless in the direction of a girth when the diaper is worn.

2. The brief-type diaper according to claim 1, wherein the diaper is formed from the outer layer sheet, the elastic member which is provided beforehand along a substantially outer peripheral edge of the outer layer sheet in an elongated state and on a surface facing a wearer when the wearer has worn the diaper, the inner layer sheet provided integrally with the outer layer sheet and the surface of the elastic member facing the wearer, and the absorbent provided at substantially the center of the surface of the inner layer sheet facing the wearer;

and wherein the elastic member is subjected to shrinkage, thereby constituting a waist opening section.

3. The brief-type diaper according to claim 2, further comprising a liquid-impervious sheet provided between the outer layer sheet and the inner layer sheet and at substantially the center of the these sheets.

4. The brief-type diaper according to claim 1, wherein the diaper is formed from the outer layer sheet, the elastic member which is provided beforehand along a substantially outer peripheral edge of the outer layer sheet in an elongated state and on a surface facing a wearer when the wearer has worn the diaper, the absorbent provided at substantially the center of the surface of the inner layer sheet facing the wearer, and the inner sheet which is provided integrally with the outer layer sheet and the surface of the elastic member facing the wearer such that an opening section covers an outer peripheral edge of the outer layer sheet, is substantially identical in shape and size with the outer layer sheet, and has an opening section located at substantially the center thereof;

and wherein the elastic member is subjected to shrinkage, thereby constituting a waist opening section.

5. The brief-type diaper according to claim 4, wherein a back sheet of the absorbent is made substantially identical in size and shape with the outer layer sheet and is placed between the elastic member and the inner layer sheet.

6. The brief-type diaper according to claim 1, wherein the diaper is formed from the donut-shaped outer layer sheet having an opening section formed at substantially the center thereof, the elastic member which is provided beforehand along a substantially outer peripheral edge of the outer layer sheet in an elongated state and on a surface facing a wearer, the inner layer sheet which is provided integrally with the outer layer sheet and the surface of the elastic member facing the wearer, is substantially identical in shape and size with the outer layer sheet, and has an opening section at substantially a center thereof, and the absorbent provided on a surface of the outer layer sheet, the surface facing the wearer, so as to straddle an opening in the opening section and opening portions left on both sides of the opening section;

the elastic member is subjected to contraction, thereby forming a waist opening; and

the opening portions which are left on both sides of the opening section constitute the leg opening sections.

7. The brief-type diaper according to claim 1, wherein the elastic member provided along the waist has a cross at a front abdominal region and a rear abdominal region along the waist, or at a right abdominal region and a left abdominal region at the waist opening section.

8. The brief-type diaper according to claim 2, wherein the elastic member provided along the waist has a cross at a front abdominal region and a rear abdominal region along the waist, or at a right abdominal region and a left abdominal region at the waist opening section.

9. The brief-type diaper according to claim 3, wherein the elastic member provided along the waist has a cross at a front abdominal region and a rear abdominal region along the waist, or at a right abdominal region and a left abdominal region at the waist opening section.

10. The brief-type diaper according to claim 1, wherein the elastic member provided at the waist opening section has a cross or overlap at a front abdominal region and a rear abdominal region along the waist, or at a right abdominal region and a left abdominal region along the waist.

11. The brief-type diaper according to claim 2, wherein the elastic member provided at the waist opening section has a cross or overlap at a front abdominal region and a rear abdominal region along the waist, or at a right abdominal region and a left abdominal region along the waist.

12. The brief-type diaper according to claim 3, wherein the elastic member provided at the waist opening section has a cross or overlap at a front abdominal region and a rear abdominal region along the waist, or at a right abdominal region and a left abdominal region along the waist.

13. The brief-type diaper according to claim 1, wherein the elastic member is rubber yarn, flat rubber, or a ribbon-shaped elastic body.

14. The brief-type diaper according to claim 2, wherein the elastic member is rubber yarn, flat rubber, or a ribbon-shaped elastic body.

15. The brief-type diaper according to claim 1, wherein the absorbent is laminated and cemented onto a side surface of either the outer layer sheet or the inner layer sheet facing the wearer.

16. The brief-type diaper according to claim 2 wherein the absorbent is laminated and cemented onto a side surface of either the outer layer sheet or the inner layer sheet facing the wearer.

17. The brief-type diaper according to claim 1, wherein the absorbent comprises a liquid-pervious top sheet, and an absorbent core which is placed adjacent to the top sheet and absorbs liquid having passed through the top sheet, and wherein a three-dimensional leakage prevention wall is provided at longitudinal side edges of the top sheet.

18. The brief-type diaper according to claim 2 wherein the absorbent comprises a liquid-pervious top sheet, and an absorbent core which is placed adjacent to the top sheet and absorbs liquid having passed through the top sheet, and wherein a three-dimensional leakage prevention wall is provided at longitudinal side edges of the top sheet.