Absorbent article with fastening system

Patent metadata

Field	Value
Publication number	US-2016101003-A1
Application number	US-201514878518-A
Country	US
Kind code	A1
Filing date	Oct 8, 2015
Priority date	Oct 14, 2014
Publication date	Apr 14, 2016
Grant date	—

Abstract

An absorbent article includes a chassis having a topsheet, a backsheet including an outer cover non-woven material, and an absorbent core disposed between the topsheet and the backsheet; at least one elastically elongatable panel joined to the chassis; and a fastening system, the fastening system having a male fastener and a female fastening material.

First claim

What is claimed is:

1 . An absorbent article comprising:
a) a chassis having i) a topsheet, ii) a backsheet comprising an outer cover non-woven material, and iii) an absorbent core disposed between the topsheet and the backsheet; and b) a fastening system, the fastening system having a male fastener and a female fastening material, wherein the male fastener is joined to the at least one elastically elongatable panel, and the male fastener includes a plurality of bidirectional micro-sized hooks, wherein:
each of the hooks has an overall hook height that is greater than or equal to one third of the overall thickness of the female fastening material but less than or equal to twice the overall thickness of the female fastening material;
each of the hooks includes a cap, and each of the caps has a vertical engagement effective area that:
has an overall shape with at least two sides that are substantially parallel, has a width-to-thickness aspect ratio that is greater than or equal to 1 but less than or equal to 2, and
is greater than or equal to 40,000 square micrometers but less than or equal to 120,000 square micrometers; and

each of the caps has an overall cap height that is:
less than or equal to one third of the thickness of the overall thickness of the female fastening material, and
less than or equal to 120 micrometers; and

each of the hooks has two arms, at least one of the arms having an underside, the underside including a recessed portion, the recessed portion having a deepest recessed depth that is greater than or equal to 40% of the overall fiber cross-sectional dimension and less than or equal to 200% of the overall fiber cross-sectional dimension; and
wherein the female fastening material is integral with the outer cover non-woven and the female fastening material comprises a section of a nonwoven web forming surface approximating a plane, a machine direction and a cross direction perpendicular to the machine direction, the nonwoven web formed predominately of polymeric fibers and comprising a series of one or more consolidating bonds impressed on the surface, the one or more consolidating bonds having at least one bond shape; wherein the series is repeated to form a pattern of consolidating bonds; wherein the series is repeated in at least four rows extending predominately in the cross direction, and the series is repeated in at least four columns extending predominately in the machine direction; and wherein the bond shape has a perimeter with a greatest measurable length and a greatest measurable width, and the perimeter:
has a convex portion;
has an aspect ratio of the greatest measurable length to the greatest measurable width of at least 2.5; and
is oriented such that a line intersecting the perimeter along which the greatest measurable length exists intersects an axis lying on the surface along the machine direction to form an angle of between 1 degree and 40 degrees.

2 . The absorbent article of claim 1 , wherein each of the arms has an underside with a recessed portion.

3 . The absorbent article of claim 1 , wherein the two sides that are substantially parallel are two side edges of the cap.

4 . The absorbent article of claim 1 , wherein the overall shape of the vertical engagement effective area is rectangular.

5 . The absorbent article of claim 1 , wherein the overall hook height is greater than or equal to half of the overall thickness of the female fastening material but less than or equal to one and half times the overall thickness of the female fastening material.

6 . The absorbent article of claim 1 , wherein the overall hook height is about equal to the overall thickness of the female fastening material.

7 . The absorbent article of claim 1 , wherein the width-to-thickness aspect ratio is greater than or equal to 1.2, but less than or equal to 1.9.

8 . The absorbent article of claim 1 , wherein the width-to-thickness aspect ratio is greater than or equal to 1.3, but less than or equal to 1.8.

9 . The absorbent article of claim 1 , wherein the vertical engagement effective area is greater than or equal to 50,000 square micrometers, but less than or equal to 100,000 square micrometers.

10 . The absorbent article of claim 1 wherein the pattern is arranged such that an airflow line may be identified on the surface, that passes at least 8 rows of consolidating bonds, without intersecting a bond shape, and intersects an axis lying on the surface along the cross direction, to form an angle of greater than 45 degrees.

11 . The absorbent article of claim 1 wherein the convex portion has varying radii.

12 . The absorbent article of claim 1 wherein the perimeter also has a concave portion disposed substantially opposite the convex portion.

13 . The absorbent article of claim 1 wherein bonds having the repeated bond shape are arranged in identical rotational orientation along a line lying on the surface along the machine direction.

14 . The absorbent article of claim 1 wherein bonds having the repeated bond shape are arranged in identical rotational orientation in a column along a line lying on the surface that intersects an axis lying on the surface along the machine direction to form an angle of less than 4 degrees.

15 . The absorbent article of claim 1 wherein the greatest measurable length lies along a line lying on the surface that intersects an axis lying on the surface along the machine direction to form an angle between 5 degrees and 15 degrees.

16 . The absorbent article of claim 1 wherein the convex portion has a camber height, and the ratio of the camber height to the greatest measurable length is 0.30 or less.

17 . The absorbent article of claim 1 wherein the perimeter has two convex portions.

18 . The absorbent article of claim 17 wherein the perimeter has two concave portions respectively disposed substantially opposite the convex portions.

19 . The absorbent article of claim 1 , wherein when the fastening system is tested under the VPT-S Method, zero out of ten samples fail at the 0.1 N application force, 7 N shear force conditions.

20 . The absorbent article of claim 1 , wherein the female fastening material has a basis weight of 13 gsm or less.

21 . The absorbent article of claim 1 , wherein the female fastening material has a basis weight between about 13 gsm and about 25 gsm.

22 . The absorbent article of claim 1 , wherein the female fastening material has a basis weight between about 10 gsm and about 22 gsm.

23 . The absorbent article of claim 1 , wherein the female fastening material contains over 50% of fibers made by spunbond process measured by weight.

24 . The absorbent article of claim 1 , wherein a zone on a front side of the disposable absorbent article can be identified wherein:
a. contains at least a portion of the female fastener, and b. area size is greater than the area size of one male fastener used in the fastening system, and c. average adhesive add-on level measured in gram per square meter applied in between the female fastener material and a substantially fluid impermeable component of the backsheet is at least 10% higher than a same size area outside of primary fastening zone.

Assignees

• Procter & Gamble

Inventors

• Jennewein Marc
• Mueller Joerg
• Kline Mark James
• Krallmann Gabriele Elisabeth
• Ramos-Medina Nayda Liz
• Xu Han
• Liu Fang

Classifications

• A61F13/511

  Topsheet, i.e. the permeable cover or layer facing the skin · CPC title

• A61F2013/51452

  being nonwovens · CPC title

• A61F13/627

  characterised by the loop · CPC title

• A61F13/515

  characterised by the interconnection of the topsheet and the backsheet · CPC title

• A61F13/5622

  specially adapted for diapers or the like · CPC title