Absorbent article

• US 20060184149A1
• Filed: 08/18/2005
• Published: 08/17/2006
• Est. Priority Date: 08/20/2004
• Status: Abandoned Application

• Current Assignee: KAO Corporation
• Original Assignee: KAO Corporation
• Inventors: Niinomi, Masahiko, Kasai, Takao, Kouta, Takuya
• Application Number:
  US11/205,982
• Publication Number:
  US 20060184149A1
• Time in Patent Office: Days
• US Class Current: 604/367
• CPC Class Codes: A61F 13/15658 Forming continuous, e.g. composite, fibrous webs, e.g. involving the application of pulverulent material on parts thereof
• CPC Class Codes: A61F 13/53 characterised by the absorbing medium A61F13/20 takes precedence
• CPC Class Codes: A61F 13/538 characterised by specific fibre orientation or weave
• CPC Class Codes: D04H 3/00 Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length

Abstract

An absorbent article has an absorbent member 1 containing a web 2 of hydrophilic long fibers. The long fibers have a crimp percentage of 40% to 90% and are oriented in the planar direction of the absorbent member 1. The web 2 has a superabsorbent polymer embeddedly supported therein. The absorbent member 1 preferably has two or more webs 2 and a superabsorbent polymer layer 3 sprinkled between the webs 2, with part of the superabsorbent polymer being embeddedly supported in the web 2.

Claims

1. An absorbent article comprising an absorbent member comprising a web of hydrophilic long fibers, the long fibers having a crimp percentage of 40% to 90% and being oriented in the planar direction of the absorbent member, and the web having a superabsorbent polymer embeddedly supported therein.

2. The absorbent article according to claim 1, wherein the superabsorbent polymer is embeddedly supported uniformly in the web.

3. The absorbent article according to claim 1, wherein the superabsorbent polymer is embeddedly supported localizedly in the side of the web adapted to face the skin.

4. The absorbent article according to claim 1, wherein the superabsorbent polymer is embeddedly supported localizedly in the side of the web adapted to face a garment.

5. The absorbent article according to claim 1, wherein the superabsorbent polymer has a larger weight per unit area than the web.

6. The absorbent article according to claim 1, wherein the absorbent member comprises at least two the webs and a layer of a superabsorbent polymer sprinkled between the webs, part of the superabsorbent polymer being embeddedly supported in the web.

7. The absorbent article according to claim 6, wherein the webs adjacent to each other are bonded in points.

8. The absorbent article according to claim 6, wherein part of the long fibers contained in at least one of the webs are in a straightened state.

9. The absorbent article according to claim 1, further having a web of hydrophilic long fibers having no crimp.

10. The absorbent article according to claim 1, wherein the absorbent member further comprises a fluff pulp layer located under the web.

11. The absorbent article according to claim 10, wherein the absorbent member comprises a stack of combined layers which have the web and the fluff pulp layer located under the web.

12. The absorbent article according to claim 10, wherein the fluff pulp layer contains a superabsorbent polymer.

13. An absorbent article according to claim 1, wherein the long fibers are oriented in the longitudinal direction of the absorbent article, and the absorbent member has no linear joint across the orientation direction of the long fibers, or the long fibers are oriented in the width direction of the absorbent article, and the absorbent member has a linear joint across the orientation direction of the long fibers.

14. A stretchable absorbent member comprising a web of hydrophilic long fibers, a superabsorbent polymer embeddedly supported in the web, and a liquid permeable sheet wrapping the web,

the hydrophilic long fibers having a crimp percentage of 40% to 90%,

the web having a high degree of orientation in the planar direction of the absorbent member, and

the liquid permeable sheet being extensible to ensure the stretchability of the absorbent member.

15. The stretchable absorbent member according to claim 14, wherein the liquid permeable sheet is obtained by subjecting a liquid permeable sheet to a processing for making the sheet extensible, and the absorbent member is stretchable in the orientation direction of the web.

16. The stretchable absorbent member according to claim 15, wherein the processing is cutting a large number of slits extending in the direction intersecting with the orientation direction of the web.

17. The stretchable absorbent member according to claim 15, wherein the processing is creping or pleating to make wrinkles or pleats extending in the direction intersecting with the orientation direction of the web.

18. The stretchable absorbent member according to claim 15, wherein the processing is corrugating to make ripples propagating in the orientation direction of the web.

19. An absorbent article comprising the absorbent member according to claim 14.

20. An absorbent article having elastic regions which extend along at least one of the longitudinal direction and the width direction and are located along at least one of a pair of lateral sides and a pair of longitudinal ends thereof and comprising an absorbent member, the absorbent member being disposed in the elastic regions,

the absorbent member being stretchable and comprising a web containing hydrophilic crimped long fibers with a high degree of orientation in one direction, and

the web having a superabsorbent polymer embeddedly supported therein.

21. The absorbent article according to claim 20, further comprising a central absorbent member and a pair of leg flaps located on both lateral sides of the central absorbent member, the leg flaps each having an elastic strand disposed therein to provide a pair of elastic regions, and the absorbent member being disposed on the upper side, lower side or by the side of the elastic strand.

22. The absorbent article according to claim 20, wherein the orientation direction of the web coincides with the longitudinal direction of the absorbent article.

23. The absorbent article according to claim 21, wherein the orientation direction of the web coincides with the direction of extension of the elastic strands located on the leg flaps.

24. The absorbent article according to claim 20, wherein the crimped long fibers have a crimp percentage of 40% to 90%.

25. The absorbent article according to claim 20, wherein the absorbent member further comprises a liquid permeable sheet wrapping the web having the superabsorbent polymer embeddedly supported therein,

the liquid permeable sheet being obtained by subjecting a liquid permeable sheet to a processing for making the sheet extensible to ensure extensibility of the absorbent member in the orientation direction of the web.

26. The absorbent article according to claim 20, further comprising a central absorbent member, the central absorbent member comprising a hydrophilic web containing long fibers and a superabsorbent polymer embeddedly supported in the web, the orientation direction of the web coinciding with the longitudinal direction of the absorbent article.

27. An absorbent member comprising webs of hydrophilic long fibers having a crimp percentage of 40% to 90% and a layer of a superabsorbent polymer sprinkled between the webs, part of the superabsorbent polymer being embeddedly supported in the web, and the webs adjacent to each other being bonded in points.

28. A process of producing an absorbent member comprising a web of crimped long fibers and a superabsorbent polymer contained in the web, the process comprising the steps of opening a web in a longitudinally stretched state under tension and feeding the superabsorbent polymer to the web in a state under reduced tension.