U.S. patent application number 13/784014 was filed with the patent office on 2013-07-18 for absorbent article having a multi-component visual signal.
This patent application is currently assigned to THE PROCTER & GAMBLE COMPANY. The applicant listed for this patent is The Procter & Gamble Company. Invention is credited to John Lee HAMMONS, Lisa June HOOD, Signe Christina LARSON, David Christopher OETJEN.
Application Number | 20130184667 13/784014 |
Document ID | / |
Family ID | 70162076 |
Filed Date | 2013-07-18 |
United States Patent
Application |
20130184667 |
Kind Code |
A1 |
LARSON; Signe Christina ; et
al. |
July 18, 2013 |
ABSORBENT ARTICLE HAVING A MULTI-COMPONENT VISUAL SIGNAL
Abstract
An absorbent article comprising a first layer comprising a
nonwoven having a first colored region that includes at least one
of a central colored region, an intermediate colored region, and an
outer colored region; and a second layer comprising a polymer film
having a second colored region that includes at least one of a
central colored region, an intermediate colored region, and an
outer colored region; wherein the first colored region differs from
the second colored region. The article may further comprise a
background region. The background region may be visually
distinguishable from at least one of the first colored region and
the second colored region.
Inventors: |
LARSON; Signe Christina;
(Cincinnati, OH) ; HOOD; Lisa June; (Cincinnati,
OH) ; OETJEN; David Christopher; (West Chester,
OH) ; HAMMONS; John Lee; (Hamilton, OH) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Gamble Company; The Procter & |
Cincinnati |
OH |
US |
|
|
Assignee: |
THE PROCTER & GAMBLE
COMPANY
Cincinnati
OH
|
Family ID: |
70162076 |
Appl. No.: |
13/784014 |
Filed: |
March 4, 2013 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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13584914 |
Aug 14, 2012 |
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13784014 |
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12548603 |
Aug 27, 2009 |
8262633 |
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13584914 |
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Current U.S.
Class: |
604/385.01 |
Current CPC
Class: |
A61F 13/51394 20130101;
A61F 13/15203 20130101; A61F 2013/15243 20130101; A61F 13/511
20130101; A61F 13/472 20130101; A61F 13/84 20130101 |
Class at
Publication: |
604/385.01 |
International
Class: |
A61F 13/472 20060101
A61F013/472 |
Claims
1. An absorbent article, comprising: a. a topsheet; b. a backsheet;
c. an absorbent core disposed between the topsheet and the
backsheet; and d. three colored regions comprising a central
colored region, an intermediate colored region, and an outer
colored region; e. wherein the three colored regions are printed on
at least two of the topsheet, the backsheet, and the absorbent
core; and f. wherein all three colored regions are visible from a
body facing side of the absorbent article.
2. The absorbent article of claim 1, wherein the three colored
regions are within a CIELab color space volume of less than about
200.
3. The absorbent article of claim 1, wherein the three colored
regions are within a CIELab color space volume of less than about
50.
4. The absorbent article of claim 1, wherein the topsheet comprises
a nonwoven.
5. The absorbent article of claim 1, wherein the topsheet comprises
a liquid pervious polymer film.
6. The absorbent article of claim 1, wherein the central colored
region is spaced apart from the intermediate colored region.
7. The absorbent article of claim 1, wherein the central colored
region is positioned substantially adjacent to the intermediate
colored region.
8. The absorbent article of claim 1, wherein one of the three
colored regions is printed on the backsheet, and another of the
three colored regions is printed on the topsheet or the absorbent
core.
9. An absorbent article, comprising: a. a plurality of layers,
comprising: i. a topsheet; ii. a backsheet; and iii. an absorbent
core disposed between the topsheet and the backsheet; and b. three
colored regions comprising a first colored region, a second colored
region, and a third colored region; c. wherein the first colored
region is printed on one of the plurality of layers; d. wherein the
second colored region and the third colored region are printed on
another of the plurality of layers; and e. wherein all three
colored regions are visible from a body facing side of the
absorbent article.
10. The absorbent article of claim 9, wherein the first colored
region is printed on the topsheet, the second colored region is
printed on the absorbent core, and the third colored region is
printed on the backsheet.
11. An absorbent article, comprising: a. a plurality of layers,
comprising: i. a topsheet; ii. a backsheet; iii. an absorbent core
disposed between the topsheet and the backsheet; and iv. an
intermediate layer disposed between the topsheet and the absorbent
core; and b. three colored regions comprising a first colored
region, a second colored region, and a third colored region; c.
wherein the first colored region is printed on one of the plurality
of layers; d. wherein the second colored region and the third
colored region are printed on another of the plurality of layers;
and e. wherein all three colored regions are visible from a body
facing side of the absorbent article.
12. The absorbent article of claim 11, wherein the first colored
region is printed on the topsheet, the second colored region is
printed on the intermediate layer, and the third colored region is
printed on the backsheet.
13. The absorbent article of claim 11, wherein the three colored
regions are within a CIELab color space volume of less than about
200.
14. The absorbent article of claim 11, wherein the three colored
regions are within a CIELab color space volume of less than about
50.
15. The absorbent article of claim 11, wherein the topsheet
comprises a nonwoven.
16. The absorbent article of claim 15, wherein the intermediate
layer comprises a liquid pervious polymer film.
17. The absorbent article of claim 11, wherein the intermediate
layer comprises a liquid pervious polymer film.
18. An absorbent article, comprising: a. a body facing layer; b. a
garment facing layer; c. an intermediate layer disposed between the
body facing layer and the garment facing layer, the intermediate
layer comprising a plurality of fibers; and d. three colored
regions comprising a central colored region, an intermediate
colored region, and an outer colored region; e. wherein some of the
plurality of fibers from the intermediate area protrude through the
body facing layer; f. wherein the protruding fibers comprise a
non-white color; and g. wherein all three colored regions are
visible from a body facing side of the absorbent article.
19. The absorbent article of claim 18, wherein the non-white color
arises from pigmenting or dyeing the fibers.
20. The absorbent article of claim 18, wherein the body facing
layer comprises a nonwoven.
Description
FIELD OF THE INVENTION
[0001] The invention provides an absorbent article having a
multi-component visual signal.
BACKGROUND OF THE INVENTION
[0002] A variety of absorbent articles that include different
colored regions are available in the market. Absorbent articles
such as sanitary napkins and female adult incontinence articles
that function to collect fluid discharged from a woman's vagina or
urethra sometimes include a colored region proximal the central
portion of the absorbent article that differs in color from
portions of the absorbent article remote from the central portion
of the absorbent article.
[0003] By including a colored region in the central portion of the
absorbent article, manufacturers of absorbent articles have
effectively taught consumers that the central portion of the
absorbent article is where the fluid collected should reside.
Manufacturers have devised a variety of designs for central colored
regions. In some absorbent articles, the central colored region is
relatively narrow as compared to the overall width of the absorbent
article and extends only along about one-half of the length of the
absorbent article. One possible reason that relatively narrow
central colored regions were adopted was that such colored regions
could provide a desired visual impression, such as the impression
of depth. Central colored regions also might help the consumer
understand how her use and placement of the product in her panty
might be affecting the staining pattern of absorbent article, which
might help her improve how and where she mounts the chassis of the
absorbent article in her panty to achieve maximum performance.
[0004] One problem associated with narrow central colored regions
on absorbent articles is that some consumers associate stain
patterns that extend outside the central colored region as
indicating that the absorbent capacity of the absorbent article is
exhausted. In some absorbent articles, the central colored region
could account for less than 25% of the absorbent capacity of the
absorbent article.
[0005] A variety of materials having outstanding widthwise and
lengthwise fluid distribution properties are available. Such
materials can distribute collected fluid to regions of the
absorbent article remote from the central colored region. An
absorbent article capable of more widely distributing fluid in the
absorbent article can be advantageous because wider fluid
distribution can effectively increase the absorbent capacity of the
absorbent article. One drawback to widely distributing fluid in an
absorbent article is that the stains of such fluid might travel
well beyond the central colored region, if present. As mentioned
above, stains outside of the central colored region might be
alarming to the wearer. Making the central colored region larger
may not be an attractive design option because larger colored
regions might make the absorbent article appear to be bulkier and
be perceived as not providing for comfortable fit.
[0006] With these limitations in mind, there is a continuing
unaddressed need for absorbent articles having a visual impression
that that are perceived by wearers as having adequate fluid storage
capacity to meet their needs. Further, there is a continuing
unaddressed need for absorbent articles that reassure the user that
fluid in the absorbent article in regions outside of a relatively
narrow colored region is securely retained in the absorbent article
and she need not worry about a leak.
SUMMARY OF THE INVENTION
[0007] Disclosed is an absorbent article having a centroid, a
longitudinal centerline, a transverse centerline orthogonal to the
longitudinal centerline and intersecting the longitudinal
centerline at the centroid, and a body facing surface. The
absorbent article comprises a background region. The absorbent
article comprises a central colored region coincident with the
longitudinal centerline. The absorbent article comprises an
intermediate colored region substantially circumscribing the
central colored region, wherein a portion of the intermediate
colored region extends across the longitudinal centerline, wherein
along the transverse centerline part of the background region is
between the intermediate colored region and the central colored
region. The absorbent article comprises an outer colored region,
wherein at least part of the background region is between the outer
colored region and the intermediate colored region. The background
region, the central colored region, the intermediate colored
region, and the outer colored region are viewable from the body
facing surface. The central colored region, the intermediate
colored region, and the outer colored region differ in color from
the background region.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 is a schematic of an absorbent article.
[0009] FIG. 2 is a schematic of an absorbent article.
[0010] FIG. 3 is a schematic of an absorbent article.
[0011] FIG. 4 is a cross-section of the absorbent article
illustrated in FIG. 1.
[0012] FIG. 5 is a schematic of an absorbent article.
DETAILED DESCRIPTION OF THE INVENTION
[0013] "Absorbent articles" as referred to herein can be sanitary
napkins, pantiliners, or incontinence pads that are worn in the
crotch region of an undergarment. It is conceivable that baby
diapers, adult incontinence diapers, and human waste management
devices might benefit from the present invention even though they
are conventionally not worn in conjunction with an undergarment.
Absorbent articles can be disposable absorbent articles.
[0014] The term `color` as referred to herein includes any primary
color, i.e., white, black, red, blue, violet, orange, yellow,
green, and indigo as well as any declination thereof or mixture
thereof. The term `non-color` or `non-colored` refers to the color
white which is further defined as those colors having an L* value
of at least 80, an a* value equal to 0.+-.2, and a b* value equal
to 0.+-.2.
[0015] The term `disposable` is used herein to describe absorbent
articles that are not intended to be re-launched or otherwise
restored or reused as absorbent articles (i.e., they are intended
to be disposed of after a single use).
[0016] Non-limiting examples of panty liners and sanitary napkins
which may be provided with multi-component visual signal include
those manufactured by The Procter & Gamble Company of
Cincinnati, Ohio, such as ALWAYS ULTRA, ALWAYS INFINITY, and ALWAYS
pantiliners. Absorbent articles such as those disclosed in U.S.
Pat. Nos. 4,324,246, 4,463,045, 6,004,893, 4,342,314, 4,463,045,
4,556,146, 4,589,876, 4,687,478, 4,950,264, 5,009,653, 5,267,992,
and Re. 32,649 are also contemplated as being absorbent articles
that might benefit from such a multi-component visual signal.
[0017] A top view of an absorbent article 5 is shown in FIG. 1. The
absorbent article 5 can have a substantially planar configuration
and a centroid 40. The centroid 40 can be the intersection between
the longitudinal centerline L and transverse centerline T. The
absorbent article 5 can have a body facing surface 10 and a garment
facing surface. The absorbent article 5 can have a machine
direction MD and a cross machine direction CD, these terms being
used as they are commonly used by those having ordinary skill in
the art.
[0018] As shown in FIG. 1, the absorbent article 5, can be
considered to have a viewing surface that is the body facing
surface 10. The body facing surface 10 can be the side of the
absorbent article 5 that is in contact the wearer's body when the
absorbent article 5 is worn, as might be the case for a sanitary
napkin, panti-liner, or adult incontinence product, or is inserted
into the wearer's body, as might be the case for a tampon. For a
generally cylindrical tampon, the longitudinal centerline L is
considered to be on the body facing surface 10 of the tampon,
aligned with the central axis of the tampon and the centroid 40 can
be the midpoint of the longitudinal centerline L. The absorbent
article 5 can have a central colored region 60, an intermediate
colored region 80, and an outer colored region 100. The central
colored region 60, intermediate colored region 80, and outer
colored region 100 can be viewable from the body facing surface
10.
[0019] When the body facing surface 10 of the absorbent article 5
is viewed, the absorbent article 5 can have a background region 50.
The background region 50 is a region that is visually
distinguishable from the central colored region 60, the
intermediate colored region 80, and the outer colored region 100.
The background region 50 can be white or any other color visually
distinguishable from the central colored region 60, the
intermediate colored region 80, and the outer colored region 100.
Two colors are believed to be visually distinguishable if there is
a .quadrature.E, which is discussed further below, between the two
colors of at least about 1. Two colors can be more visually
distinguishable if there is a .quadrature.E between the two colors
of at least about 3.
[0020] The central colored region 60 can be coincident with the
longitudinal centerline L. The central colored region 60 can be
part of the topsheet 30. The central colored region 60 can be part
of the absorbent core 90, the absorbent core 90 being disposed
between the topsheet 30 and the backsheet 92. The central colored
region 60 can be positioned on a layer intermediate the topsheet 30
and the absorbent core 90. The central colored region 60 need only
to be visually perceptible when the body facing surface 10 is
presented to the viewer. The central colored region 60 can be
provided by printing, pigmenting, dyeing, or other known means for
creating a contrast in color of a substrate. Providing the central
colored region 60 coincident with the longitudinal centerline L can
make the absorbent article 5 to appear to be thicker than an
absorbent article 5 that is devoid of a central colored region 60.
The central colored region 60 can be coincident with the centroid
40, which might make the absorbent article appear to be more
symmetric, which might be perceived as providing for better fit and
performance. The entire outer colored region 100 can be positioned
away from the transverse centerline T such that no part of the
outer colored region 100 intersects the transverse centerline
T.
[0021] The central colored region 60, as shown in FIG. 1, can be a
substantially elongated shape. Without being bound by theory, it is
believed that elongated shapes that are aligned with or on the
longitudinal centerline L may make the absorbent article 5 look as
if the absorbent article 5 is slim as compared to an absorbent
article 5 devoid of such an elongated shape. A consumer might
associate such an impression with a belief that the apparently
narrow absorbent article will fit comfortably in the crotch of her
panty. The central colored region 60 can have a width less than
about 50% of the maximum distance between portions of the periphery
110 coincident with the transverse centerline T.
[0022] The intermediate colored region 80 can substantially
circumscribe the central colored region 60. By substantially
circumscribe, it is meant that more than n radians around the
center of mass of the central colored region 60 is circumscribed by
the intermediate colored region 80, which corresponds to the
intermediate colored region 80 radially circumscribing more than
about 50% of the central colored region 60. More than about 1.5.pi.
radians around the center of mass of the central colored region 60
can be circumscribed by the intermediate colored region 80, which
corresponds to the intermediate colored region 80 radially
circumscribing more than about 75% of the central colored region
60. More than about 1.8.pi. radians around the center of mass of
the central colored region 60 can be circumscribed by the
intermediate colored region 80, which corresponds to the
intermediate colored region 80 radially circumscribing more than
about 90% of the central colored region 60. Without being bound by
theory, it is believed that the intermediate colored region 80
might be understood by wearers as an intermediate portion of the
absorbent article 5 beyond which if staining occurs, the wearer
should consider being more alert to the potential need to change
the absorbent article 5 in the proximal future. The intermediate
colored region 80 can be provided by printing, pigmenting, dyeing,
or any other known means for creating a contrast in color of a
substrate.
[0023] An outer colored region 100 can be positioned such that the
intermediate colored region 80 is positioned between the central
colored region 60 and the outer colored region 100. Providing an
outer colored region 100 such that the intermediate colored region
80 is between the outer colored region 100 and the central colored
region 60 is thought to possibly provide several benefits. For
instance, for absorbent articles 5 capable of laterally
distributing collected fluid, stains in the absorbent article 5
that appear beyond the intermediate colored region 80 need not
worry the wearer because the absorbent article 5 likely has
sufficient absorbent capacity to contain additional fluid. By
providing an outer colored region 100 outwards of the central
colored region 60 and intermediate colored region 80, the wearer of
the absorbent article 5 might better understand that the portion of
the absorbent article 5 comprising the outer colored region 100 has
additional fluid storage capacity because the wearer might
understand that the outer colored region 100 is placed in such
location to indicate to the wearer that staining in that location
is not necessarily undesirable. The outer colored region 100 can be
provided by printing, pigmenting, dyeing, or other known means for
creating a contrast in color of a substrate.
[0024] The central colored region 60 and intermediate colored
region 80 can be spaced apart from one another. Such an arrangement
can be desirable so that poor registration of the central colored
region 60 and the intermediate colored region 80 that might occur
during manufacturing might be obscured as compared to a design in
which the central colored region 60 and intermediate colored region
80 are butted up against one another. Alternatively, the
intermediate colored region 80 can be positioned substantially
adjacent to the central colored region 60. Such an arrangement
might be useful in that staining that occurs in an intermediate
colored region 80 that is substantially adjacent the central
colored region 60 can provide an indication to the wearer that
increased vigilance by the wearer might be advisable as the
generally central portion of the absorbent article may be
approaching capacity.
[0025] The outer colored region 100 can be positioned on the
longitudinal centerline L. Without being bound by theory, an outer
colored region 100 positioned on the longitudinal centerline L is
thought to provide the benefit that when staining occurs in such an
area, that the wearer should be prepared to change the absorbent
article within a relatively short period of time.
[0026] In some embodiments, at least part of the background region
50 can be between the outer colored region 100 and the intermediate
colored region 80. Such an approach is thought to provide for a
background region 50 and outer colored region 100 that are
perceptibly distinct from one another. Similarly, along the
transverse centerline T, part of the background region 50 can be
between the intermediate colored region 80 and the central colored
region 60, to provide for perceptibly distinct regions.
[0027] The absorbent article 5 can comprise two outer colored
regions 100 disposed such that the two outer colored regions 100
are positioned on the longitudinal centerline L and the central
colored region 60 is between the two outer colored regions 100.
Such an arrangement might be desirable in that the two outer
colored regions 100 will tend to be located towards the front
(oriented towards the pubic region) and back ends (oriented towards
the anal region) of the absorbent article and staining in the outer
colored regions 100 can be an indicator that the absorbent article
5 should be changed. Arranged as such, the intermediate colored
region 80 can be between each outer colored region 100 and the
central colored region 60.
[0028] The central colored region 60 can have a central colored
region area that is between about 15% and about 50% of the area of
the absorbent core 90 measured in the MD-CD plane. The outer
colored region 100 can be less than about 15% of the area of the
absorbent core 90 in the MD-CD plane.
[0029] As shown in FIG. 2, the absorbent article 5 can comprise two
outer colored regions 100 in which the two outer colored regions
100 are spaced apart from one another such that the longitudinal
centerline L is between the two outer colored regions 100. By
placing two outer colored regions 100 on opposing sides of the
longitudinal centerline L, the outer colored regions 100 are
located somewhat in proximity to the periphery 110 of the absorbent
article 5. As such, staining occurring in the outer colored regions
100 located in proximity to the periphery 110 can be an indicator
that the absorbent article 5 is approaching or has absorbed the
maximum amount of fluid that the absorbent article 5 is designed to
store. In another embodiment, the absorbent article 5 can comprise
two outer colored regions 100 that are spaced apart from one
another such that the transverse centerline T is between the two
outer colored regions 100.
[0030] The absorbent article 5 can be considered to have a first
end 150 and a second end 160. The first end 150 and second end 160
can be considered to be on opposing sides of the transverse
centerline T. The first end 150 can comprise two outer colored
regions 100 on opposing sides of the longitudinal centerline L.
Similarly, the second end 160 can comprise two outer colored
regions 100 on opposing sides of the longitudinal centerline.
Structured as such, the absorbent article can comprise four outer
colored regions 100 dispersed away from the central colored region
60. As the absorbent article 5 might have the capacity to absorb
fluid in these outer colored regions 100 remote from the most
central portion of the absorbent article 5, the outer colored
regions 100 can indicate to the wearer that the staining in such
areas is not a cause for immediate alarm. The first end 150 can be
the end of the absorbent article 5 oriented towards the wearer's
pubic area when worn and the second end 160 can be the end of the
absorbent article 5 oriented towards the wearer's anal area when
worn.
[0031] In some embodiments, it may be desirable to have the
background region 50 completely frame at least the central colored
region 60. For instance, the background region 50 can be between
the central colored region 60 and the periphery 110, as shown in
FIGS. 1 and 2. In effect, the central colored region 60 is set off
or distinct from the periphery 110 so that the central colored
region 60 does not contact the periphery 110. This may be desirable
because for many absorbent articles 5 in which the periphery 110
comprises a bond between the topsheet 30 and backsheet 92, the bond
might not be absorbent and a central colored region 60 in contact
with such bond might be misunderstood by the wearer as being
absorbent. For the same reason as above, the central colored region
60, intermediate colored region 80, and outer colored region 100 or
outer colored regions 100 might be substantially surrounded by the
background region 50. That is, the background region 50 could be
between the periphery 110 and the any of the central colored region
60, intermediate colored region 80, and outer colored region 100 or
outer colored regions 100.
[0032] To provide for more visually coherent designs, the central
colored region 60, the intermediate colored region 80, and outer
colored region 100 can be within a CIELab color space volume of
less than about 200. CIELab color space volume is discussed in more
detail below. With such an approach, the colors of the central
colored region 60, intermediate colored region 80, and outer
colored region 100 do not differ substantially to the eye of most
viewers and viewers might perceive the colors to be shades or
subtle variations of the same color. Subtle variations in color are
thought to be pleasing to the eye, much like sample paint chips
having slightly varying colors that can be pleasurable and
interesting to view. If less distinctiveness between the central
colored region 60, intermediate colored region 80, and outer
colored region 100 is desired, the central colored region 60,
intermediate colored region 80, and outer colored region 100 can be
within a CIELab color space volume of less than about 50.
[0033] When the body facing surface 10 of the absorbent article 5
is viewed, the background region 50, central colored region 60,
intermediate colored region 80, and outer colored region 100 are
viewable by an observer. The central colored region 60,
intermediate colored region 80, and outer colored region 100 are
visibly distinct from the background region 50 in that central
colored region 60, intermediate colored region 80, and outer
colored region 100 each differ in color from the background region
50. The central colored region 60 and the background region 50 can
differ in color by a .quadrature.E, which is discussed in more
detail below, of at least about 1. Similarly, the intermediate
colored region 80 and the background region 50 can differ in color
by a .quadrature.E of at least about 1 so that the intermediate
colored region 80 is noticeable against the background region 50.
The outer colored region 100 and the background region 50 can
differ in color by a .quadrature.E of at least about 1. To provide
for simple manufacturing, the central colored region 60,
intermediate colored region 80, and outer colored region 100 can be
provided on a first layer of material in the absorbent article
5.
[0034] The central colored region 60 can be darker than the outer
colored region 100. The darkness of a color can be quantified as L,
discussed below, with lower values of L corresponding to darker
colors. Such a design might be useful for situations in which the
central portion of the absorbent article 5 has a greater fluid
capacity than more peripherally located portions of the absorbent
article 5. Further, a central colored region 60 that is darker than
the outer colored region 100 may provide for improved stain masking
in the portion of the absorbent article 5 with which the central
colored region 60 is coordinated. It may not be desirable to mask a
stain in the outer colored region 100 as much as in the central
colored region 60 because if the wearer does not perceive the
stain, she might not recognize that she should consider changing
the absorbent article 5 in the near future. For the same reasons
with respect ensuring that stains in relatively remote portions of
the absorbent article 5 are apparent to the wearer, the central
colored region 60 can be darker than the intermediate colored
region 80 and the intermediate colored region 80 can be darker than
the outer colored region 100.
[0035] As shown in FIG. 3, the absorbent article can comprise a
first layer 20 and a second layer 22. The first layer 20 can
comprise a colored region selected from the group consisting of the
central colored region 60, the intermediate colored region 80, and
the outer colored region 100. The second layer 22 can comprise a
colored region selected from the group consisting of the central
colored region 60, the intermediate colored region 80, and the
outer colored region 100, wherein the colored region of the first
layer 20 differs from the colored region of the second layer 22. In
such an embodiment, different colored regions can be located on
different layers of the absorbent article 5, the layers being
combined to create the overall visual impression. In manufacturing,
the first layer 20 and second layer 22 can each be provided with
the colored region or regions desired to be disposed thereon and
the first layer 20 and second layer 22 can be combined in the
manufacturing process
[0036] It is thought that by having different colored regions on
different layers of material of the absorbent article 5 that a
richer visual impression can be created on the absorbent article 5.
For instance, if the central colored region 60 and outer colored
region 100 (or outer colored regions 100) are on different layers
of materials, when viewed, at least one of the colored regions will
be viewed through the layer comprising the other colored region. A
colored region viewed through another layer material can have a
significantly different visual impression in terms of
softness/diffuseness of the image, somewhat like the difference
between a matte finished photograph versus a gloss finished
photograph or the way an undergarment looks beneath a sheer article
of clothing. Further, if the first layer 20 and second layer 22 are
different material types, for example one is a film and the other
is a nonwoven, different coloring techniques might be used on each
layer. For instance, contact printing (e.g. gravure printing) might
be employed for providing a colored region on a film and inkjet
printing might be employed to provide a colored region on a
nonwoven. Such a multilayer approach might also allow changes in
certain colored regions to be made conveniently on-line during
manufacturing. For instance, a single manufacturing line could be
used to produce a plurality of absorbent articles 5 having
identical central colored regions 60 and outer colored regions 100
that vary from absorbent article 5 to absorbent article 5.
[0037] The first layer 20 can be a topsheet 30. The first layer 20
can be a fluid pervious polymer film or a nonwoven material. The
first layer 20 can be a secondary topsheet 30 or insert, for
instance an intermediate layer that is between the material in
contact with the wearer's body when worn and the absorbent core 90
that is designed to collect and retain fluid. The first layer 20
can be an absorbent core 90. The first layer 20 can be a fibrous
nonwoven wherein fibers from the nonwoven protrude through the
second layer 22. Fibers from the nonwoven protruding through the
second layer 22 can be provided by needle punching or other
suitable method for moving the fibers of one web through another
web such as disclosed in U.S. Pat. No. 7,410,683.
[0038] The second layer 22 can be a topsheet 30. The second layer
22 can be a fluid pervious polymer film, a nonwoven material, or
another suitable fluid pervious material. The second layer 22 can
be a secondary topsheet 30 or insert, for instance an intermediate
layer that is between the material in contact with the wearer's
body, such as the topsheet 30, when worn and the absorbent core 90
that is designed to collect and retain fluid. The second layer 22
can be an absorbent core 90.
[0039] Each of the central colored region 60, intermediate colored
region 80, and outer colored region 100 can be provided to a layer
by a technique selected from the group consisting of ink jet
printing, gravure printing, flexographic printing, lithographic
printing, and screen printing. In one embodiment of the method of
fabricating, the coloration technique by which the central colored
region 60 is colored differs from the coloration technique by which
the outer colored region 100 is colored.
[0040] A cross section of the absorbent article 5 illustrated in
FIG. 1 is shown in FIG. 4. As illustrated, the absorbent article 5
can comprises a topsheet 30, a backsheet 92, and an absorbent core
90 disposed between the topsheet 30 and the backsheet 92. In some
embodiments, each component of the absorbent article 5, and the
absorbent article 5 itself, as illustrated in FIG. 4, can be
considered to have a body facing side 11 and a garment facing side
12. The body facing side 11 being oriented towards the wearer's
body or vaginal wall when the absorbent article is in-use and the
garment facing side 12 opposing the body facing side 11. A tampon
would not be considered to have a garment facing side since it is
worn in the interior of the body.
[0041] Any of the central colored region 60, intermediate colored
region 80, and outer colored region 100 can be disposed on or be
part of any layer of the absorbent article 5 so long as these
colored regions are visually perceptible from the body facing side
11 of the absorbent article 5. These colored regions can be located
on, for example, the body facing side 11 or garment facing side 12
of any layer of the absorbent article 5. For instance, the central
colored region 60 can be printed on the body facing side 11 of the
absorbent core 90 and the outer colored region 100 can be printed
on the garment facing side 12 of the topsheet 30. Any of the
central colored region 60, intermediate colored region 80, and
outer colored region 100 can be provided on an insert positioned
between the topsheet 30 and the absorbent core 90.
[0042] As shown in FIG. 5, the outer colored region 100 can be
positioned such that the outer colored region 100 is between the
central colored region 60 and the intermediate colored region 80.
Such an approach might be desirable if the intermediate colored
region 80 is placed proximal the periphery 110, which might be
perceived as a barrier to fluid flow.
[0043] The color of the central colored region 60, intermediate
colored region 80, outer colored region 100, and background region
50 are measured by the reflectance spectrophotometer according to
the colors' L*, a*, and b* values. The L*, a*, and b* values are
measured from the body facing surface 10 of the absorbent article 5
inboard of the periphery 110 of the absorbent article 5. The
difference in color is calculated using the L*, a*, and b* values
by the formula
.quadrature.E=[(L*.sub.X.cndot.-L*.sub.Y).sup.2+(a*.sub.X.cndot.-a*.sub.Y-
).sub.2+(b*.sub.X-b*.sub.Y).sup.2].sup.1/2. Herein, the `X` in the
equation may represent the central colored region 60, the
intermediate colored region 80, outer colored region 100, or the
background region 50 and `Y` may represent the color of another
region against which the color of such region is compared. X and Y
should not be the same two points of measurement at the same time.
In other words, for any particular comparison of the difference in
color, the location of X is not the same as the location of Y.
[0044] Where more than two colors are used, the `X` and `Y` values
alternately include points of measurement in them also. The key to
the .quadrature.E calculation herein is that the `X` and `Y` values
should not stem from the same measured point on the viewing
surface. In those instances where there is effectively no
background region 50 within the confines of the measurement area,
the `X` values should flow from a point different in spatial
relationship to the `Y` values, but within the confines of the
periphery absorbent core 90.
[0045] Reflectance color is measured using the Hunter Lab LabScan
XE reflectance spectrophotometer obtained from Hunter Associates
Laboratory of Reston, Va. An absorbent article 5 is tested at an
ambient temperature between 65.degree. F. and 75.degree. F. and a
relative humidity between 50% and 80%.
[0046] The spectrophotometer is set to the CIELab color scale and
with a D65 illumination. The Observer is set at 10.degree. and the
Mode is set at 45/0.degree.. Area View is set to 0.125'' and Port
Size is set to 0.20''. The spectrophotometer is calibrated prior to
sample analysis utilizing the black glass and white reference tiles
supplied from the vendor with the instrument. Calibration is done
according to the manufacturer's instructions as set forth in
LabScan XE User's Manual, Manual Version 1.1, August 2001,
A60-1010-862. If cleaning is required of the reference tiles or
samples, only tissues that do not contain embossing, lotion, or
brighteners should be used (e.g., PUFFS tissue). Any sample point
on the absorbent article containing the imparted color to be
analyzed can be selected.
[0047] The absorbent article 5 is placed over the sample port of
the spectrophotometer with a white clamp disk placed behind the
absorbent article 5. The absorbent article 5 is to be in a
substantially flat condition and free of wrinkles.
[0048] The absorbent article 5 is removed and repositioned so that
a minimum of six readings of color of the body facing surface 10
are conducted. If possible (e.g., the size of the imparted color on
the element in question does not limit the ability to have six
discretely different, non-overlapping sample points), each of the
readings is to be performed at a substantially different region on
the externally visible surface so that no two sample points
overlap. If the size of the colored region requires overlapping of
sample points, only six samples should be taken with the sample
points selected to minimize overlap between any two sample points.
The readings are averaged to yield the reported L*, a*, and b*
values for a specified color on an externally visible surface of an
element.
[0049] In calculating the CIELab color space volume, V, maximum and
minimum L*, a*, and b* values reported are determined for a
particular set of regions to be measured. The maximum and minimum
L*, a*, and b* values reported are used to calculate the CIELab
color space volume, V, according to the following formula:
V = 4 3 .DELTA. L * 2 .DELTA. a * 2 .DELTA. b * 2 ##EQU00001##
[0050] Within the above formula, .DELTA.L* is the difference in L*
values between the two colored regions being compared and is
calculated by: .DELTA.L*=L*.sub.X-L*.sub.Y. The .DELTA.a* is the
difference in a* values between the two colored regions being
compared and is calculated by: .DELTA.a*=a*.sub.X-a*.sub.Y. The
.DELTA.b* is the difference in b* values between the two colored
regions being compared and is calculated by:
.DELTA.b*=b*.sub.X-b*.sub.Y. The CIELab color space volume can
result in a solid substantially ellipsoidal in shape. If .DELTA.L*,
.DELTA.a*, and .DELTA.b* are equal, the solid will be spherical. As
used herein, a "solid" refers to the mathematical concept of a
three-dimensional figure having length, breadth, and height (or
depth). An ellipsoidal volume is preferred to calculate volume
because an ellipsoid generally requires the dimensional differences
of .DELTA.L*, .DELTA.a*, and .DELTA.b* to be relatively more
uniform than other solids. Furthermore, it is believed that
ellipsoidal volumes are more visually acceptable (i.e., less
detectable color mismatch by human perception) than spherical
volumes.
[0051] In some embodiments, the colors of at least two externally
visible surfaces of discrete elements will occupy a CIELab color
space volume of less than about 200. The externally visible
surfaces are analyzed according to the Test Method described above.
Upon analysis, the inherent color of an element comprising an
externally visible surface will yield L*, a*, and b* coordinates.
The CIELab color space volume is then calculated using the formula
presented above. The resulting volume can be less than about 200.
The resulting volume can be less than about 50.
[0052] It should be recognized that the colors of more than two
discrete colored regions having a visible surface may occupy the
aforementioned CIELab color space volumes. In calculating the
CIELab color space volume for more than two elements, the CIELab
color space volume is calculated using the maximum and minimum L*,
a*, and b* from a set of elements. The maximum color values and
minimum color values are used to calculate V according to the
formula presented above.
[0053] The dimensions and values disclosed herein are not to be
understood as being strictly limited to the exact numerical values
recited. Instead, unless otherwise specified, each such dimension
is intended to mean both the recited value and a functionally
equivalent range surrounding that value. For example, a dimension
disclosed as "40 mm" is intended to mean "about 40 mm"
[0054] Every document cited herein, including any cross referenced
or related patent or application, is hereby incorporated herein by
reference in its entirety unless expressly excluded or otherwise
limited. The citation of any document is not an admission that it
is prior art with respect to any invention disclosed or claimed
herein or that it alone, or in any combination with any other
reference or references, teaches, suggests or discloses any such
invention. Further, to the extent that any meaning or definition of
a term in this document conflicts with any meaning or definition of
the same term in a document incorporated by reference, the meaning
or definition assigned to that term in this document shall
govern.
[0055] While particular embodiments of the present invention have
been illustrated and described, it would be obvious to those
skilled in the art that various other changes and modifications can
be made without departing from the spirit and scope of the
invention. It is therefore intended to cover in the appended claims
all such changes and modifications that are within the scope of
this invention.
* * * * *