Catamenial device with an absorbent layer having admixture of discrete superabsorbent and introfying particles

• US 4,327,728 A
• Filed: 06/04/1980
• Issued: 05/04/1982
• Est. Priority Date: 10/24/1978
• Status: Expired due to Term

• Current Assignee: Johnson and Johnson Consumer Products Inc (Johnson & Johnson)
• Original Assignee: Johnson and Johnson Baby Products Co (Johnson & Johnson)
• Inventors: Elias, Robert T.
• Primary Examiner(s): Ives, P.
• Application Number:
  US06/153,709
• Time in Patent Office: 699 Days
• Field of Search: 128/285, 128/284, 128/290 R
• US Class Current: 604/368
• CPC Class Codes: A61F 13/202 Catamenial tampons A61F13/2022-A61F13/34 take precedence
• CPC Class Codes: A61F 13/206 Tampons made of rolled-up material
• CPC Class Codes: A61F 13/511 Topsheet, i.e. the permeable cover or layer facing the skin
• CPC Class Codes: A61F 13/5323 having absorbent material located in discrete regions, e.g. pockets
• CPC Class Codes: A61F 13/535 inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes A61F13/5323, A61F13/537 take precedence
• CPC Class Codes: A61F 13/536 having discontinuous areas of compression
• CPC Class Codes: A61F 13/539 characterised by the connection of the absorbent layers with each other or with the outer layers
• CPC Class Codes: A61F 2013/51042 with hydrophobic and hydrophilic fibres
• CPC Class Codes: A61F 2013/530481 having superabsorbent materials, i.e. highly absorbent polymer gel materials
• CPC Class Codes: A61F 2013/53051 being only in particular parts or specially arranged
• CPC Class Codes: A61F 2013/530671 being mixed with mineral or inert material, e.g. "introfying particles"
• CPC Class Codes: A61F 2013/5395 with thermoplastic agent, i.e. softened by heat
• CPC Class Codes: A61L 15/18 containing inorganic materials
• CPC Class Codes: A61L 15/60 Liquid-swellable gel-forming materials, e.g. super-absorbents
• CPC Class Codes: Y10S 604/904 Tampons

Abstract

A catamenial device such as a tampon, a sanitary napkin or the like, is disclosed which includes an absorbent layer having at least one pocket containing a uniform admixture of discrete superabsorbent particles and discrete introfying particles.

Claims

1. A catamenial device comprising a moisture permeable outer layer containing an absorbent layer, said absorbent layer including at least one discrete pocket therein, at least a portion of said pocket being moisture permeable, said pocket containing therewithin a uniform admixture of discrete particulate hydrocolloid material and discrete introfying particles which maintain the particles of hydrocolloid material in spaced relationship relative to one another.

2. A catamenial device as set forth in claim 1 where said absorbent layer includes a plurality of discrete pockets each containing an admixture of hydrocolloid and introfying particles.

3. A catamenial device as set forth in claim 2 wherein said absorbent layer includes a cellulosic fibrous batt of loosely compacted fibers adjacent to said pockets.

4. A catamenial device as set forth in claim 1 wherein said device is a tampon.

5. A catamenial device as set forth in claim 1 wherein said device is a sanitary napkin.

6. A sanitary napkin comprising a moisture permeable outer layer, and an absorbent batt surrounded by said outer layer, said absorbent batt being a cellulosic fibrous batt of loosely compacted fibers and including a plurality of discrete pockets therein, at least a portion of each of said pockets being moisture permeable, and each of said pockets containing therewithin a uniform admixture of discrete particles of hydrocolloid material, said particles of hydrocolloid material being retained in spaced relationship relative to one another by discrete introfying particles disposed within each pocket.

7. A sanitary napkin as set forth in claim 6 wherein said pockets are spaced from one another.

8. A sanitary napkin as set forth in claim 6 wherein said pockets are interconnected.

9. A sanitary napkin as set forth in claim 6 wherein each pocket includes a moisture permeable membrane surrounding said hydrocolloid and introfying particles.

10. A tampon comprising a moisture permeable outer layer, and an absorbent batt surrounded by said outer layer, said absorbent batt being a cellulosic fibrous batt of loosely compacted fibers and including a plurality of discrete pockets therein, at least a portion of each of said pockets being moisture permeable, and each of said pockets containing therewithin a uniform admixture of discrete particles of hydrocolloid material, said particles of hydrocolloid material being retained in spaced relationship relative to one another by discrete introfying particles disposed within each pocket.

11. A tampon as set forth in claim 10 wherein said pockets are spaced from one another.

12. A tampon as set forth in claim 10 wherein said pockets are interconnected.

13. A tampon as set forth in claim 10 wherein each pocket includes a moisture permeable membrane surrounding said hydrocolloid and introfying particles.

14. A catamenial device comprising a moisture permeable outer layer, containing an absorbent batt, said absorbent batt including at least one discrete pocket therein, at least a portion of said pocket being moisture permeable, and said pocket containing therewithin a plurality of discrete particles of hydrocolloid material, said particles of hydrocolloid material being retained in spaced relationship relative to one another by discrete introfying particles disposed within said pocket, said hydrocolloid particles and said introfying particles being present in said pocket in a uniform admixture which has a bulk volume from about 4 to about 60 times a great as the bulk volume of the hydrocolloid particles therein.

15. A catamenial device as set forth in claim 14 wherein the device is a sanitary napkin.

16. A catamenial device as set forth in claim 14 wherein the device is a tampon.

17. A catamenial device comprising a moisture permeable outer layer containing an absorbent batt, said absorbent batt including at least one discrete pocket therein, at least a portion of said pocket being moisture permeable, and said pocket containing therewithin a plurality of discrete particles of hydrocolloid material, said particles of hydrocolloid material being retained in spaced relationship relative to one another by discrete introfying particles disposed within said pocket, said introfying particles having sufficient structural integrity to substantially retain their size and shape under compressive forces exerted by said hydrocolloid particles as they swell and expand when wetted, said hydrocolloid particles and said introfying particles being present in said pocket in a uniform admixture which has a bulk volume from about 4 to about 60 times as great as the bulk volume of the hydrocolloid particles therein.

18. A catamenial device as set forth in claim 17 wherein said hydrocolloid and introfying particles occupy only a portion of the internal volume of said pocket.

19. A catamenial device as set forth in claim 17 wherein at least a portion of said pocket is defined by an expansible membrane.

20. A catamenial device as set forth in claim 17 wherein said pocket is formed by a bag formed of a porous, high wet strength, light-weight filter paper.

21. A catamenial device as set forth in claim 20 wherein said bag is formed of two sheets of filter paper secured to one another around their periphery.

22. A catamenial device as set forth in claim 17 wherein said introfying particles have a bulk density less than about 0.05 g./ml.

23. A catamenial device as set forth in claim 17 wherein said bulk volume of said uniform admixture is from about 20 to about 50 times the bulk volume of the hydrocolloid particles therein.