U.S. patent application number 14/623220 was filed with the patent office on 2017-04-27 for absorbent personal care article having intermeshing flaps.
The applicant listed for this patent is Kimberly-Clark Worldwide, Inc.. Invention is credited to Rogerio B. Bastos, Luciana V. Mercer, Paula C. Winkel.
Application Number | 20170112689 14/623220 |
Document ID | / |
Family ID | 56620617 |
Filed Date | 2017-04-27 |
United States Patent
Application |
20170112689 |
Kind Code |
A9 |
Mercer; Luciana V. ; et
al. |
April 27, 2017 |
Absorbent Personal Care Article Having Intermeshing Flaps
Abstract
An absorbent personal care article, such as a sanitary napkin or
incontinence pad, having a longitudinal centerline and a transverse
centerline and including a pair of opposed first and second wings
extending along the longitudinal sides of the article. The first
wing includes two or more peaks with furrows there between and the
second wing includes one or more peaks. The peaks of the first and
second wings are sized and positioned on the article such that when
folded under the article and around the wearer's undergarments, the
peak of the second wing extends across the longitudinal centerline
of the article and into the furrow of the first wing. The
inter-meshing wings help wearer's properly don the articles,
improve the attachment of the article to the wearer's garment
and/or reduce unwanted twisting or bunching of the article during
use.
Inventors: |
Mercer; Luciana V.; (Sao
Paulo, BR) ; Bastos; Rogerio B.; (Guaiba, BR)
; Winkel; Paula C.; (Chilton, WI) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Kimberly-Clark Worldwide, Inc. |
Neenah |
WI |
US |
|
|
Prior
Publication: |
|
Document Identifier |
Publication Date |
|
US 20160235607 A1 |
August 18, 2016 |
|
|
Family ID: |
56620617 |
Appl. No.: |
14/623220 |
Filed: |
February 16, 2015 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
13662129 |
Oct 26, 2012 |
8986273 |
|
|
14623220 |
|
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|
|
61558259 |
Nov 10, 2011 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A61F 13/5644 20130101;
A61F 13/5616 20130101 |
International
Class: |
A61F 13/56 20060101
A61F013/56 |
Claims
1. An absorbent personal care article comprising: a wearer-facing
side and a garment-facing side; an elongate shape defined by
opposed first and second sides extending in a longitudinal
direction and opposed front and rear ends extending in a transverse
direction, said article having a longitudinal centerline; a liquid
permeable topsheet, a liquid impermeable backsheet and an absorbent
core disposed between the liquid permeable topsheet and liquid
impermeable backsheet; a first flap extending from the first side
and having first and second peaks and a furrow positioned between
said first and second peaks; a second flap extending from the
second side and having a first peak; a first fastener positioned on
at least one of the first and second flaps; a second fastener
positioned on the garment-facing side of said liquid impermeable
backsheet; wherein the first flap and the second flap are sized
such that, when folded under the article and extended to lay flat
against the liquid impermeable backsheet, the first peak of the
second flap extends across the longitudinal centerline of the
article and into the furrow of the first flap.
2. The absorbent personal care article of claim 1 wherein the
furrow of the first flap and the first peak of the second flap are
sized and shaped to substantially conform with one another when the
first and second flaps are folded under the article and extended to
lay flat against the liquid impermeable backsheet.
3. The absorbent personal care article of claim 2 wherein, when
folded under the article and extended to lay flat against the
liquid impermeable backsheet, the first flap and the second flap do
not overlap thereby forming a gap between the first and second
flaps.
4. The absorbent personal care article of claim 3 wherein the gap
between the first flap and second flap is less than 15 mm when the
first and second flaps are folded under the article and extended to
lay flat against the liquid impermeable backsheet.
5. The absorbent personal care article of claim 4 wherein the gap
between the first flap and second flap is substantially uniform
when the first and second flaps are folded under the article and
extended to lay flat against the liquid impermeable backsheet.
6. The absorbent personal care article of claim 1 wherein, when
folded under the article and extended to lay flat against the
liquid impermeable backsheet, the first flap and the second flap
overlap thereby forming an overlap region having an area of at
least 50 mm.sup.2.
7. The absorbent personal care article of claim 6 wherein the first
fastener is located on the overlap region of at least one of the
first or second flaps such that, when the first and second flaps
are folded under and adjacent the liquid impermeable backsheet, the
fastener releasably joins the overlap region.
8. The absorbent personal care article of claim 7 wherein the first
peak of the second flap overlaps a base of the furrow of the first
flap, thereby forming said overlap region, when the first and
second flaps are folded under the article and extended to lay flat
against the liquid impermeable backsheet.
9. The absorbent personal care article of claim 7 wherein the
second flap has shoulders adjacent the first peak and further
wherein the first peak of the first flap overlaps the shoulder of
the second flap, thereby forming said overlap region, when the
first and second flaps are folded under and adjacent the liquid
impermeable backsheet.
10. The absorbent personal care article of claim 6 wherein, when
the first and second flaps are folded under the article and
extended to lay flat against the liquid impermeable backsheet, an
intermediate portion of the first peak of the first flap overlaps
an intermediate portion of the first peak of the second flap,
thereby forming said overlap region, generally extending in the
transverse direction.
11. The absorbent personal care article of claim 1 wherein the
first and second flaps extend between about 20-70% of the length of
the article.
12. The absorbent personal care article of claim 14 wherein the
longitudinal distance from the middle of the first peak of the
first flap to the middle of the furrow of the first flap is between
about 20 and about 60 mm.
13. The absorbent personal care article of claim 1 wherein: the
absorbent core has an asymmetrical shape having a front end having
a greater width than the rear end of the article; and further
wherein the first peak of the first flap is positioned forward of
the second peak of the first flap; and further wherein the first
peak of the first flap extends a greater distance from the
longitudinal centerline than the second peak of the first flap.
14. The absorbent personal care article of claim 1 wherein the
second flap further includes a second peak and a furrow positioned
between the first and second peaks and further wherein the first
flap and second flap are sized and positioned such that, when
folded under the article and extended to lay flat against liquid
impermeable backsheet, the second peak of the first flap extends
into the furrow of the second flap.
15. The absorbent article of claim 1 wherein said first fastener is
positioned on the garment-facing side of at least said first
flap.
16. The absorbent article of claim 1 wherein said first absorbent
article has a length of between 80 mm and 450 mm and further
wherein said first and second flaps have a length between 40 mm and
160 mm.
17. The absorbent article of claim 1 wherein the first fastener is
positioned proximate the outer edges of the peak of said second
flap and further comprising a third fastener positioned on the
furrow of said first flap.
18. The absorbent article of claim 7 wherein said first fastener is
positioned on the wearer-facing facing side of said overlap region
on at least one of said first and second flaps.
19. The absorbent article of claim 18 further comprising a third
fastener positioned on the garment-facing side of at least one of
said first and second flaps.
Description
RELATED APPLICATION
[0001] The present application is a divisional application of U.S.
patent application Ser. No. 13/662,129, by Luciana V. Mercer et
al., filed on Oct. 26, 2012, the contents of which are incorporated
herein.
FIELD OF THE INVENTION
[0002] The present invention relates to fastening systems for
absorbent personal care articles. More particularly, it relates to
absorbent personal care articles having foldable wings or flaps
that can be employed to properly position and attach the absorbent
articles to undergarments or other articles of clothing.
BACKGROUND
[0003] Absorbent personal care articles such as sanitary napkins,
panty liners and incontinence pads commonly utilize a pair of wings
or flaps which are used to help secure the article in place to the
wearer's undergarments. Generally, the wings are folded around the
outside of the wearer's undergarment and attach to the outside of
the undergarment via adhesive or other fastening means. Once
secured to the undergarment the wings help reduce the likelihood
that the article will become dislodged and move out of position.
Examples of such foldable wing fasteners are shown and described in
U.S. Pat. No. 4,589,876 Van Tilberg; EP0511905B1 Pigneul; U.S. Pat.
No. 5,401,268 Rodier; and EP1208823A1 Hohmann.
[0004] However, while wings of various size and shape have
previously been used, there remain a number of drawbacks to these
designs. First, many wings do not adequately prevent the article
from bunching or twisting due to the stresses imparted on the
article as the wearer moves. Second, misapplication of the article
to the undergarment can also greatly increase the risk of leakage.
In this regard, it can be difficult for wearers to place
conventional wings properly onto their undergarment and when the
wings are improperly fastened the absorbent article can be bunched
or partially twisted as donned or more easily become twisted or
bunched with the wearer's movement. Twisting of the article and/or
the deformation of the article when worn can result in the article
being at an angle relative to the wearer as opposed to being
perpendicular to or flat against the wearer. When the article is
sidewardly angled to the wearer the ability of the article to take
in and absorb fluids can be reduced to an extent such that the
article functions significantly less effectively than desired.
Further, bunching of the article results in the article covering
considerably less area under the vaginal region than desired. Thus,
such unwanted twisting and bunching of the article can result in
increased frequency of leakage and staining of the wearer's
garments.
[0005] Thus, there exists a continued need for an absorbent
personal care article having foldable wings that assist the wearer
with proper placement and donning of the article.
[0006] There further exists a need for such an article wherein the
foldable wings also help maintain the article in an uncontorted
and/or generally flap shape in order to minimize the incidence of
leakage.
SUMMARY OF THE INVENTION
[0007] The present invention addresses problems experienced with
the flap designs of the prior art by providing an absorbent
personal care article including (i) a left flap having first and
second peaks and a furrow positioned there between, and (ii) a
right flap having a first peak. The left and right flaps are
positioned on opposed longitudinal sides of the article and sized
such that, when the flaps are folded under the article and extended
so that they lay flat against the liquid impermeable backsheet, the
right flap peak extends across the longitudinal centerline of the
article and into the left flap furrow.
[0008] In a further aspect of the invention, the left and right
flaps can be integrally shaped and sized such that the wings
substantially inter-mesh with or conform to one another when folded
under and around the article. In still a further embodiment, the
left and right flaps may define a space or gap between them along
the substantial length of the flaps when the flaps are folded under
the article lying flat adjacent the liquid impermeable backsheet.
In an alternate embodiment, the left and right flaps can be sized
and shaped so as to form one or more discrete areas of overlap when
the flaps are folded under and around the article and lay flat
against the liquid impermeable backsheet.
[0009] In a further aspect of the invention, the left and right
flaps may include fasteners located on the garment facing side of
the flap peaks such that the fastener extends across the
longitudinal centerline of the article and either into the furrow
of the opposed flap or over the opposed flap. This may be achieved,
in one embodiment, by placing the fastener proximate the outer
edges of the flap peaks.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIG. 1 is a representative partially cut away plan view of
one embodiment of a sanitary napkin of the present invention in a
flat and unfolded state.
[0011] FIG. 2 is a representative plan view of a sanitary napkin of
an alternate embodiment of the present invention suitable for use
with both traditional and tanga style underwear.
[0012] FIGS. 3-6 are enlarged views of individual embodiments of
wings of the present invention shown in an inter-meshing
relationship as folded directly under the personal care article
lying flat against the backsheet.
DESCRIPTION OF THE INVENTION
[0013] In reference to FIGS. 1 and 2, the drawings show absorbent
personal care articles in a flat and unfolded state. Except as
otherwise noted, discussion of dimensions of the article and/or the
positions of individual components thereof are in reference to the
article being in a flat and unfolded state and further, in the
event elasticated components are utilized, dimensions are in
reference to the article being in an uncontracted state. Further,
as used herein, the terms "comprising" or "including" are inclusive
or open-ended and do not exclude additional unrecited elements,
compositional components, or method steps. Accordingly, the terms
"comprising" or "including" encompass the more restrictive terms
"consisting essentially of" and "consisting of."
[0014] In reference to FIG. 1, an absorbent personal care article
10 is provided comprising a liquid permeable topsheet 12, a liquid
impermeable backsheet 14 and an absorbent core 16. The absorbent
article 10 has a lengthwise or longitudinal direction and a
widthwise or transverse direction. The longitudinal centerline of
the article 10 is shown as line "L" and the transverse centerline
of the article 10 is shown as line "T". The absorbent article 10
can comprise any one of numerous elongate shapes including, but not
limited to, triangular, rectangular, dog-bone and elliptical. In
addition, it will often times be desirable for the article to have
rounded corners and/or generally convex ends.
[0015] The absorbent article desirably has a length between about
80 mm and about 450 mm, and still more desirably a length between
about 150 mm to about 250 mm. The absorbent article 10 desirably
has a maximum width (excluding the wings) between about 40 and
about 160 mm, and still more desirably a maximum width between
about 65 mm and about 95 mm.
[0016] The absorbent article 10 further includes a first wing 20
and second wing 30 extending from opposite longitudinal sides of
the article 10. The first and second wings 20, 30 desirably extend
from about 20% to about 75% of the length of the article 10. In a
further aspect, the wings desirably have a length, in the
longitudinal direction L, of from about 40 mm to about 160 mm, and
still more desirably a length from about 95 mm to about 145 mm. The
wings can be positioned about the transverse centerline or may be
positioned either some distance forward or rear of the transverse
centerline as may be desired to better accommodate the particular
shape of the article and/or use on a particular style of garment.
In addition, while not shown, it is noted that absorbent articles
can, if desired, contain more than one set of opposed wings of the
present invention.
[0017] A portion of the outside surface of the wings 20, 30 include
one or more fasteners 26, 36. The fastener will be selected to
releasably engage either a garment or an overlapping portion of an
opposed wing. Numerous adhesives and mechanical hook-type fasteners
that releasably attach to itself or a user's garments are well
known in the art and are suitable for use in connection with the
present invention. Pressure sensitive adhesives are particularly
well suited for use with the present invention. However, in order
to protect the adhesive from contamination or drying prior to use,
the adhesive is commonly protected by one or more releasable peel
strips as is known in the art. A suitable releasable peel strip is
a white Kraft paper having a silicone coating on one side so that
it can be easily released from the adhesive. In addition, with
respect to wing-to-wing attachment, examples of specific mechanical
hook, adhesive and other fastening systems include but are not
limited to those described in WO03/015682 to Hammonds et al.;
WO03/015684 to Hammonds et al. and US20040133179 to Steger et
al.
[0018] The first wing 20 includes at least a first peak 21 and a
second peak 22 and a furrow base 24 spanning the peaks; the inner
edges of the first and second peaks 21, 22 and the furrow base 24
define a groove or furrow 24A in the first wing 20. The shapes of
the peaks and furrow(s) can vary as desired including both
rectilinear and curvilinear configurations. The wing 20 and
components thereof are sized such that, when the wing 20 is folded
around the underside of the article and the wing 21 lays flat
against the backsheet 14, portions of the first and second peaks
21, 22 extend across the longitudinal centerline L whereas the
furrow base 24 does not extend across or even to the longitudinal
centerline. Thus, the specific dimensions for the wings will be
selected in relation to the corresponding width of the absorbent
article. In one aspect, the dimension of the peak in the transverse
direction may be at least 50% of the width of the adjacent section
of the absorbent core. In a further aspect, the distance from the
middle of the first peak to the middle of the furrow base 24 is
desirably at least about 20 mm and still more desirably between
about 20 mm and about 60 mm. /
[0019] The second wing 30 includes at least a first peak 31 and
first and second shoulders 38, 39 positioned on opposite sides of
the first peak 31 of the second wing 30. Individual elements of the
second wing 30 can have dimensions the same as or similar to those
of the first wing 20. However, as discussed in more detail below,
desirably the peaks, furrows, and/or shoulders of the first and
second wings are shaped so to coincide with one another. The second
wing 30 and components thereof are sized such that, when second
wing 30 is folded around the underside of the article and lays flat
against the backsheet 14, portions of the first peak 31 extend
across the longitudinal centerline L io whereas the shoulders 38,
39 do not extend across or even to the longitudinal centerline L.
The shapes of the peak(s), furrow(s) and/or shoulders can vary as
desired including both rectilinear and curvilinear
configurations.
[0020] The first and second wings 20, 30 are positioned along the
longitudinal sides of the article 10 wherein the furrow base 24 of
the first wing 20 lies in the same plane as the first peak 31 of
the second wing. Stated differently, the first and second wings 20,
30 are positioned along opposed longitudinal sides of the article
10 such that, when the first and second wings 20, 30 are folded
around the underside of the article 10 and extended to lay flat
against the backsheet 14, the first peak 31 of the second wing 30
extends into the furrow 24A of the first wing 20 (the furrow 24A of
the first wing 20 being defined by the peaks 21, 22 and furrow base
24).
[0021] In one embodiment and in reference to FIG. 3, the first and
second wings 20, 30 can be sized and shaped so that, when folded
around the underside of the article 10 and extended to lay flat
against the backsheet 14, the wings 20, 30 do not overlap thereby
leaving a space or gap "G" between them. In the embodiment shown,
the wings 20, 30 are sized and shaped so that they substantially
intermesh but leave a substantially uniform gap "G" between them
when folded around the underside of the article so as to lay flat
against the backsheet 14. Desirably in such embodiments the wings
leave a gap "G" of less than about 20 mm and still more desirably
less than about 15 mm. Thus, in use, the first wing 20 and second
wing 30 extend around the crotch portion of the garment, and the
first peak 31 of the second wing 30 extends into the furrow 24A of
the first wing 20 in a mating relationship. In a further aspect,
the first and second peaks 21, 22 of the first wing 20 and the
shoulders 38, 39 of the second wing 30 similarly lie in a
corresponding relationship having a similar gap between the
respective edges. Primary fasteners 26, 36, such as pressure
sensitive adhesive, can be positioned adjacent the outer edges of
the peaks such that, when the wings 20, 30 are folded under the
article so that the wings 20, 30 lie flat against the backsheet 14,
the fasteners 26, 36 lie on the opposite side of the longitudinal
center line relative to which the wing is attached. The wings may
also optionally include secondary fasteners 27, 37 located
proximate to outer edges of the furrow base 24, shoulders 38, 39 or
base of the peaks 21, 22, 31. The primary fasteners 26, 36 may lie
entirely or partially beyond the longitudinal center line when the
wings 20, 30 are folded around the underside of the article 10 and
lay flat against the backsheet 14. As shown in FIG. 3, when the
wings 20, 30 are folded around the underside of the article 10 and
lay flat against the backsheet 14, the primary fasteners 26, 36 are
positioned entirely on the opposite side of the longitudinal center
line "L" relative to the side that the wing extends from.
[0022] In a further embodiment, and in reference to FIGS. 4 and 5,
the first and second wings 20, 30 are sized and shaped so that the
wings form overlap regions 50 when folded around the underside of
the article 10 and extended to lay flat against the backsheet
14.
[0023] Thus, in use, the first wing 20 and second wing 30 can
extend around the crotch portion of the garment and the first peak
31 of the second wing 30 extends over the furrow base 24 of the
first wing 20 in an overlapping relationship. In this embodiment
the wings are sized and shaped so as to inter-mesh in a manner such
that the wings superpose one another. When the wings 20, 30 are
folded around the underside of the article 10 so as to lay flat
against the backsheet 14, individual overlap regions 50 formed by
the superposed portions of the first wing 20 and second wing 30
desirably each comprise an area of at least about 50 mm.sup.2, more
desirably between about 50-600 mm.sup.2 and still more desirably
between about 100-250 mm.sup.2. In a particular embodiment and in
reference to FIG. 4, the dimension of the wings relative to the
width of the article 10 (exclusive of the wings) is such that the
first and second wings 20, 30 form overlap regions 50 adjacent the
outer edges of the peaks 21, 22 and 31 extending generally in the
longitudinal direction. In a further particular embodiment and in
reference to FIG. 5, the shape and dimension of the wings 20, 30
relative to the width of the article 10 (exclusive of the wings) is
such that the first and second wings 20, 30 form overlap regions 50
adjacent the side edges of the peaks 21, 22 and 31 extending
generally in the transverse direction T. The wings 20, 30 can
include fasteners (not shown) positioned on one or both areas of
the wings intended to overlap and directly engage one another.
Desirably the fasteners are positioned adjacent the edges of the
peaks 21, 22, 31. The wings may optionally include secondary
fasteners such as pressure sensitive adhesive located in one or
more areas of the wings 20, 30 intended to overly the garment when
worn.
[0024] In still a further embodiment and in reference to FIG. 6,
the second wing 30 can have a shape the same as or substantially
similar to that of the first wing 20. Thus, in this embodiment, the
first wing 20 and second wing 30 each have first peaks 21, 31,
second peaks 22, 32 and furrow bases 24, 34 respectively. The first
peaks 21, 31 and second peaks 22, 32 are sized so as to extend
beyond the longitudinal centerline "L" when the wings 20, 30 are
folded under the backside of the article and extended so as to lay
flat against the backsheet 14. In addition, the wings 20, 30 are
off-set from one another such that, when the wings are folded
around the underside of the article and extended so that the wings
20, 30 lay flat against the backsheet 14, the first peak 31 of the
second flap 30 extends into the furrow of the first wing 20 and the
first peak 21 of the first wing 20 extends into the furrow of the
second wing 30. As will be readily understood by one skilled in the
art, the multiple peaks of the wings can be configured to have
non-overlapping relationships, overlapping relationships or both an
overlapping and non-overlapping relationship. Accordingly, the
wings will contain a plurality of fasteners in accord with the
selected overlap scheme and fastening mechanism. In reference to
FIG. 6, the primary fasteners 26, 36 traverse the longitudinal
centerline "L."
[0025] The front and rear halves of each wing can be symmetrical or
asymmetrical as desired. For example, in one embodiment and in
reference to FIG. 1, the front and rear halves of the wings, i.e.
the halves above and below the transverse centerline in the
longitudinal direction, are symmetrical. The absorbent core in the
embodiment of FIG. 1 is also symmetrical and commonly it will be
desirable for the wings to be symmetrical when the absorbent core
is symmetrical. In an alternate embodiment, and in reference to
FIG. 2, the absorbent core 16 is shaped having wider front (F) and
narrower rear (R) sections in order to better conform to a tanga or
thong type undergarments as well as for use in connection with
certain overnight pads. The wings are therefore configured to
correspond with the difference in the width of the article 10. More
specifically, the first peak 21 of first wing 20, which is
positioned adjacent a wider section of the absorbent core 16, has a
greater dimension in the transverse direction than the rearward
second peak 22 of the first wing 20. In the embodiment shown in
FIG. 2 the wings 20, 30 are centered about the transverse
centerline "T" of the article however, as noted previously, the
wings 20, 30 can be positioned either forwardly or rearwardly
relative to the transverse centerline as desired.
[0026] With respect to the general function and composition of the
article 10, the backsheet or outer cover 12 functions to isolate
absorbed fluids from the wearer's garments and therefore comprises
a liquid-impervious material. In one aspect the outer cover may
optionally comprise a material that prevents the passage of liquids
but allows air and water-vapor to pass there through. The outer
cover can comprise a single layer or multiple layers and these one
or more layers can themselves comprise similar or different
materials. Suitable backsheet materials include, but are not
limited to, polyolefin films, nonwovens and film/nonwoven
laminates. The particular structure and composition of the outer
cover may be selected from various known films and/or fabrics with
the particular material being selected as appropriate to provide
the desired level of liquid barrier, strength, abrasion resistance,
tactile properties, aesthetics and so forth. Suitable outer covers
include, but are not limited to, those described in U.S. Pat. No.
4,578,069 to Whitehead et al.; U.S. Pat. No. 4,376,799 to Tusim et
al.; U.S. Pat. No. 5,695,849 to Shawver et al; U.S. Pat. No.
6,075,179 et al. to McCormack et al. and U.S. Pat. No. 6,376,095 to
Cheung et al.
[0027] The topsheet 14 functions to receive and take in fluids,
such as urine or menses, and therefore comprises a liquid permeable
material. Additionally, topsheets can further function to help
isolate the wearer's skin from fluids held in the absorbent core
16. Topsheets can comprise a single layer or multiple layers and
these one or more layers can themselves comprise similar or
different materials. Topsheets are well known in the art and may be
manufactured from a wide variety of materials such as, for example,
porous foams, reticulated foams, apertured plastic films, woven
materials, nonwoven webs, aperture nonwoven webs and laminates
thereof. It is also well known that one or more chemical treatments
can be applied to the topsheet materials in order to improve io
movement of the fluid through the topsheet and into the article.
Suitable topsheets include, but not limited to, those described in
U.S. Pat. No. 4,397,644 to Matthews et al.; U.S. Pat. No. 4,629,643
to Curro et al.; U.S. Pat. No. 5,188,625 Van Iten et al.; U.S. Pat.
No. 5,382,400 to Pike et al.; U.S. Pat. No. 5,533,991 to Kirby et
al.; and 6,410,823 to Daley et al.
[0028] Between the liquid pervious topsheet 12 and liquid
impervious backsheet 14 is positioned an absorbent core 16. The
absorbent core 16 functions to absorb and preferably "lock-up" the
bodily fluids that pass into the absorbent article 10 through the
topsheet 12. The absorbent core can comprise a single layer or
multiple layers and these one or more layers can themselves
comprise similar or different materials. In order to efficiently
and effectively utilize the absorbent capacity of the article, it
is common for the absorbent core to include one or more liquid
distribution layers or wicking layers in combination with a highly
absorbent layer that preferentially absorbs and retains the
liquids. Suitable wicking layers include, but are not limited to,
bonded-carded webs, hydroentangled nonwoven webs, or spunbond webs
containing fibers treated with or containing one or more topical
agents that improve the contact angle with the bodily fluid and/or
modify the flow properties of the bodily fluid. Highly absorbent
layers often include, but not limited to, batts or webs containing
wood pulp fibers, superabsorbent particles, synthetic wood pulp
fibers, synthetic fibers and combinations thereof. The absorbent
core may comprise any one of a number of materials and structures,
the particular selection of which will vary with the desired
loading capacity, flexibility, body fluid to be absorbed and other
factors known to those skilled in the art. By way of example,
suitable materials and/or structures for the absorbent core
include, but are not limited to, those described in U.S. Pat. No.
4,610,678 to Weisman et al.; U.S. Pat. No. 6,060,636 to Yahiaoui et
al.; U.S. Pat. No. 6,610,903 to Latimer et al.; US20100174260 to Di
Luccio et al.; and U.S. Pat. No. 7,358,282 to Krueger t al.
[0029] The shape of the absorbent core can vary as desired and can
comprise any one of various shapes including, but not limited to,
generally triangular, rectangular, dog-bone and elliptical shapes.
In one embodiment, the absorbent core 16 has a shape that generally
corresponds with the overall shape of the article 10 such that the
absorbent core terminates proximate the edge seal 18 and wings 20,
30. The dimensions of the absorbent core can be substantially
similar to those referenced above with respect to the absorbent
article 10; however it will be appreciated that the dimensions of
the absorbent core 16 while similar will often be slightly less
than those of the overall absorbent article 10 in order to be
contained therein.
[0030] As previously indicated, the absorbent core 16 is positioned
between the topsheet 12 and backsheet 14. The individual layers
comprising the article can be attached to one another using means
known in the art such as adhesive, heat/pressure bonding,
ultrasonic bonding and other suitable mechanical attachments.
Commercially available construction adhesives usable in the present
invention include, for example Rextac adhesives available from
Huntsman Polymers of Houston, Tex., as well as adhesives available
from Bostik Findley, Inc., of Wauwatosa, Wis. In one embodiment,
and in reference to FIG. 1, the absorbent core can be sealed
between the topsheet 12 and backsheet 14 along the perimeter of the
absorbent core 16 along edge seal 18 formed by the application of
heat and pressure to melt thermoplastic polymers located in the
topsheet 12 and/or backsheet 14.
[0031] The wings can be constructed from materials described above
with respect to the topsheet and backsheet. In one embodiment, the
wings can comprise an extension of a layer of material within the
topsheet and/or backsheet. By way of example and in reference to
FIG. 1, the wings 20, 30 can be formed by an extension of the
topsheet 12 and backsheet 14 that are welded together along edge
seal 18. Such wings can be integrally formed with the main portion
of the absorbent article. Alternatively, the wings can be formed
independently and separately attached to an intermediate section of
the article. Wings that are made independent of the other
components of the absorbent article can be welded onto or
adhesively joined to a portion of the topsheet and/or backsheet. In
addition, as is known in the art, when cutting materials to the
desired shape it is preferable to arrange the components so as to
minimize waste. Examples of processes for manufacturing absorbent
articles and wings include, but are not limited to those described
in U.S. Pat. No. 4,059,114 to Richards; U.S. Pat. No. 4,862,574 to
Seidy et al., io WO1997040804 to Emenaker et al.; U.S. Pat. No.
5,342,647 to Heindel et al.; US20040040650 to Venturino et al.; and
U.S. Pat. No. 7,070,672 to Alcantara et al.
[0032] In order to further assist with the maintenance of the
article 10 in the desired location on the undergarment, garment
adhesive (not shown) may be applied to the garment facing side of
the backsheet 14. The use of garment adhesive on the backsheet to
help secure placement of an absorbent article on the garment is
well known in the art and there are numerous adhesive patterns and
releasable peel strips suitable for use with the present invention.
Examples of suitable garment adhesives, patterns and release sheets
include, but are not limited to, those described in DE700225U1;
U.S. Pat. No. 3,881,490 to Whitehead et al.; U.S. Pat. No.
3,913,580 Ginocchio; U.S. Pat. No. 4,337,772 to Roeder et al.;
GB1349962 Roeder; U.S. Pat. No. 4,556,146 to Swanson et al.; and
US20070073255A1 to Thomas et al.
[0033] The absorbent articles of the present invention may further
include one or more components or elements as may be desired. By
way of example, the absorbent article may optionally include slits,
voids or embossing on the topsheet and/or absorbent core in order
to improve fluid intake, fluid distribution, stiffness (bending
resistance) and/or aesthetic appeal. As a specific example and in
reference to FIGS. 1 and 6, embossing 17 can extend into both the
topsheet 12 and absorbent core 16. Examples of additional suitable
embossing patterns and methods include, but are not limited to,
those are described in U.S. Pat. No. 4,781,710 Megison et al.;
EP769284A1 to Mizutani et al.; US20050182374 to Zander et al.; and
U.S. Pat. No. 7,686,790 to Rasmussen et al.
[0034] The personal care articles can, optionally, contain one or
more additional elements or components as are known and used in the
art including, but not limited to, the use of fold lines,
individual wrappers, elasticated flaps that extend above the plain
of the topsheet in use, additional independent wings such as about
the ends, odor control agents, perfumes, and the use of ink
printing on one or more surfaces of the topsheet, backsheet, wings
or absorbent core. Still further additional features and various
constructions are known in the art. Thus, while the invention has
been described in detail with respect to specific embodiments
and/or examples thereof, it will be apparent io to those skilled in
the art that various alterations, modifications and other changes
may be made to the invention without departing from the spirit and
scope of the same. It is therefore intended that the claims cover
or encompass all such modifications, alterations and/or
changes.
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