DISPOSABLE DIAPER HAVING REDUCED ABSORBENT CORE TO BACKSHEET GLUING

• US 20150005726A1
• Filed: 09/15/2014
• Published: 01/01/2015
• Est. Priority Date: 06/10/2011
• Status: Active Grant

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: EHRNSPERGER, Bruno Johannes, KREUZER, Carsten Heinrich, HIPPE, Matthias Konrad, LOEFFLER, Egon, BIANCHI, Ernesto G., ARIZTI, Blanca
• Granted Patent: US 9,173,784 B2
• Time in Patent Office: Days
• US Class Current: 604/361
• CPC Class Codes: A61F 13/42 with wetness indicator or alarm
• CPC Class Codes: A61F 13/49 Absorbent articles specially adapted to be worn around the waist, e.g. diapers
• CPC Class Codes: A61F 13/514 Backsheet, i.e. the impermeable cover or layer furthest from the skin A61F13/15211, A61F13/15252 take precedence
• CPC Class Codes: A61F 13/51401 characterised by the material
• CPC Class Codes: A61F 13/51474 characterised by its structure
• CPC Class Codes: A61F 13/51498 Details not otherwise provided for
• CPC Class Codes: A61F 13/53 characterised by the absorbing medium A61F13/20 takes precedence
• CPC Class Codes: A61F 13/5323 having absorbent material located in discrete regions, e.g. pockets
• 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 2013/15406 Basis weight
• CPC Class Codes: A61F 2013/428 for articles with superabsorbent materials
• CPC Class Codes: A61F 2013/51409 being a film
• CPC Class Codes: A61F 2013/530386 with pulp and polymeric
• CPC Class Codes: A61F 2013/530496 being fixed to fibres
• CPC Class Codes: A61F 2013/53051 being only in particular parts or specially arranged
• CPC Class Codes: A61F 2013/530554 and being fixed to a web
• CPC Class Codes: A61F 2013/53062 being made into a paper or non-woven
• CPC Class Codes: A61F 2013/5307 characterized by the quantity or ratio of superabsorbent material
• CPC Class Codes: A61F 2013/530868 characterized by the liquid distribution or transport means other than wicking layer A61F13/537 takes precedence
• CPC Class Codes: A61F 2013/53908 : with adhesive
• CPC Class Codes: A61F 2013/53925 : with intermittent pattern, e.g. spots

Abstract

The present disclosure generally relates to disposable diapers having absorbent cores comprising superabsorbent polymer particles which are immobilized by adhesive. The absorbent cores are attached to the backsheets of the disposable diapers in certain attachment zones to reduce see-through and the formation of tension lines on the backsheets.

Claims

1. A disposable diaper comprising a backsheet, a topsheet and therein between an absorbent core, the absorbent core having a longitudinal direction with a longitudinal axis and perpendicular thereto a lateral direction with a transverse axis, the absorbent core comprising a front region, a back region and a crotch region therein between and a front lateral edge, an opposing back lateral edge, and longitudinally extending side edges, wherein the absorbent core comprises superabsorbent polymer particles, the superabsorbent polymer particles being immobilized by a first core adhesive, wherein the absorbent core comprises less than 5% of airfelt, and wherein

a) the absorbent core is attached to the backsheet of the disposable diaper in attachment zones adjacent to the front lateral edge and the back lateral edge of the absorbent core;

and

b) the absorbent core is attached to the backsheet of the disposable diaper in the crotch region of the absorbent core in attachment zones adjacent to the longitudinal side edges of the absorbent core.

2. The disposable diaper of claim 1, wherein the backsheet comprises a film and one or more nonwoven webs, wherein the basis weight of the backsheet including the film and the one or more nonwoven webs is less than 70 g/m², and wherein the film has a basis weight of less than 25 g/m².

3. The disposable diaper of claim 1, wherein the backsheet is non-elastic.

4. The disposable diaper of claim 1, wherein the backsheet is highly non-elastic.

5. The disposable diaper of claim 1, wherein the absorbent core is attached to the topsheet at least in the front region and in the crotch region of the absorbent core.

6. The disposable diaper of claim 1, wherein absorbent material of the absorbent core comprises more than 95% of the superabsorbent polymer particles.

7. The disposable diaper of claim 1, wherein the absorbent core comprises first and second carrier substrates, and wherein the superabsorbent polymer particles are provided between the first and second carrier substrates.

8. The disposable diaper of claim 1, wherein the first core adhesive is a hot melt adhesive.

9. The disposable diaper of claim 1, wherein the absorbent core comprises one or more channels which are free of the superabsorbent polymer particles.

10. The disposable diaper of claim 9, wherein the one or more channels are provided in areas other than the attachment zones.

11. The disposable diaper of claim 1, wherein the absorbent core is attached to the backsheet by an adhesive.

12. The disposable diaper of claim 11, wherein the adhesive is a hot melt adhesive.

13. The disposable diaper of claim 1, wherein the absorbent core is unattached to the backsheet in any other region.

14. The disposable diaper of claim 1, wherein the absorbent core is not attached to the backsheet over the entire absorbent core surface.

15. The disposable diaper of claim 1, wherein the absorbent core is attached to the backsheet of the disposable diaper in the crotch region of the absorbent core in one or more than one attachment zones on or adjacent to the longitudinal axis of the absorbent core, wherein the one or more than one attachment zones cover from 0.2% to 3% of the total surface area of the absorbent core.

16. The disposable diaper of claim 15, wherein the disposable diaper comprises a wetness indicator, and wherein the wetness indicator is placed between the absorbent core and the backsheet in at least one of the one or more attachment zones.

17. A disposable diaper comprising a backsheet, a topsheet and therein between an absorbent core, the absorbent core having a longitudinal direction with a longitudinal axis and perpendicular thereto a lateral direction with a transverse axis, the absorbent core comprising a front region, a back region and a crotch region therein between and a front lateral edge, an opposing back lateral edge, and longitudinally extending side edges, wherein the absorbent core comprises superabsorbent polymer particles, the superabsorbent polymer particles being immobilized by a first core adhesive, wherein the absorbent core comprises less than 5% of airfelt, and wherein

a) the absorbent core is attached to the backsheet of the disposable diaper in attachment zones adjacent to the front lateral edge and the back lateral edge of the absorbent core;

and

b) the absorbent core is attached to the backsheet of the disposable diaper in the crotch region of the absorbent core in attachment zones adjacent to the longitudinal side edges of the absorbent core;

wherein the absorbent core comprises one or more channels which are free of the superabsorbent polymer particles;

wherein the one or more channels are provided in areas other than the attachment zones.

18. A disposable diaper comprising a backsheet, a topsheet and therein between an absorbent core, the absorbent core having a longitudinal direction with a longitudinal axis and perpendicular thereto a lateral direction with a transverse axis, the absorbent core comprising a front region, a back region and a crotch region therein between and a front lateral edge, an opposing back lateral edge, and longitudinally extending side edges, wherein the absorbent core comprises superabsorbent polymer particles, the superabsorbent polymer particles being immobilized by a first core adhesive, wherein the absorbent core comprises less than 5% of airfelt, and wherein

a) the absorbent core is attached to the backsheet of the disposable diaper in attachment zones adjacent to the front lateral edge and the back lateral edge of the absorbent core;

b) the absorbent core is attached to the backsheet of the disposable diaper in the crotch region of the absorbent core in attachment zones adjacent to the longitudinal side edges of the absorbent core; and

c) the absorbent core is attached to the backsheet of the disposable diaper in the crotch region of the absorbent core through a wetness indicator;

wherein the absorbent core comprises one or more channels which are free of the superabsorbent polymer particles;

wherein the one or more channels are provided in areas other than the attachment zones.