Global patent index - EP 1018981 A2

EP 1018981 A2 2000-07-19 - LAYERED ABSORBENT STRUCTURE WITH A ZONED BASIS WEIGHT AND A HETEROGENEOUS LAYER REGION

Title (en)

LAYERED ABSORBENT STRUCTURE WITH A ZONED BASIS WEIGHT AND A HETEROGENEOUS LAYER REGION

Title (de)

ABSORBIERENDE MEHRSCHICHTIGE STRUKTUR MIT BEREICHEN VON UNTERSCHIEDLIDCHEM FLÄCHENGEWICHT UND HETEROGENEN SCHICHTBEREICHEN

Title (fr)

STRUCTURE ABSORBANTE A COUCHES COMPORTANT UNE MASSE SURFACIQUE ZONEE ET UNE ZONE DE COUCHE HETEROGENE

Publication

EP 1018981 A2 (EN)

Application

EP 98957318 A

Priority

  • US 9821270 W
  • US 6141697 P
  • US 6218997 P
  • US 9702998 A

Abstract (en)

[origin: WO9917679A2] A distinctive absorbent article includes an absorbent core having multiple absorbent layers, wherein the absorbent layers interact in such a manner which preferentially locates absorbed liquid in an appointed, high saturation wicking layer. The localization of the liquid within this wicking layer increases the potential of this layer to move liquid through capillary action due to the higher saturation level and increased amount of liquid available. The intake capability of the absorbent system is maintained or improved over current systems by keeping a second layer of the absorbent system at low saturation levels through as many insults of the product as possible, while providing optimum intake performance through appropriate control of the composite properties. The low saturation in this layer provides void volume for the incoming insult as well, as a high permeability, thus increasing the intake rate of the absorbent system as a whole, but the structure of the low saturation layer is also balanced to provide an appropriately high level of capillary tension to provide enough control of the liquid to stop leakage from occurring. This low saturation layer is used in addition to a surge material and provides intake functionality in addition to that provided by the surge material. In particular aspects of the invention, the body side layer of the absorbent core does not extend over the entire surface of the overall absorbent core, therefore is not used as the high saturation, wicking layer, but as the intake layer. This arrangement also allows the intake layer to be in direct contact with the incoming liquid, therefore allowing for more immediate access and improved intake function. In additional aspects, at least one primary layer region can have a non-uniform, selectively zoned basis weight distribution. Particular configurations of the at least one primary layer region can be constructed with a target area of such primary layer region having a basis weight which is less than a basis weight of another non-target portion of the primary layer region. Moreover, at least one primary layer region can have a heterogeneous structure. In particular constructions, the at least one primary layer region can include a plurality of two or more sublayers.

IPC 1-7 (main, further and additional classification)

A61F 2/00

IPC 8 full level (invention and additional information)

A61F 13/53 (2006.01); A61F 2/00 (2006.01); A61F 5/44 (2006.01); A61F 13/15 (2006.01); A61F 13/49 (2006.01); A61F 13/534 (2006.01); A61L 15/60 (2006.01)

IPC 8 main group level (invention and additional information)

A61F (2006.01)

CPC (invention and additional information)

A61F 13/15 (2013.01); A61F 13/49015 (2013.01); A61F 13/49466 (2013.01); A61F 13/535 (2013.01); A61F 13/5376 (2013.01); A61F 2013/530722 (2013.01)

Citation (search report)

See references of WO 9917679A3

Designated contracting state (EPC)

BE DE ES FR GB IT NL SE

EPO simple patent family

WO 9917679 A2 19990415; WO 9917679 A3 19990819; AR 017306 A1 20010905; AU 1360399 A 19990427; AU 738839 B2 20010927; BR 9815392 A 20010904; CA 2304219 A1 19990415; CO 5070597 A1 20010828; EP 1018981 A2 20000719; IL 134972 D0 20010520; JP 2002509737 A 20020402; KR 20010015721 A 20010226; MX 225083 B 20041216; MX PA00003383 A 20001101

INPADOC legal status

2004-09-15 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20040218

2003-09-24 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20030807

2000-07-19 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000505

2000-07-19 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): BE DE ES FR GB IT NL SE