U.S. patent application number 12/164872 was filed with the patent office on 2009-12-31 for delivery product for topical compositions.
This patent application is currently assigned to Kimberly-Clark Worldwide, Inc.. Invention is credited to Kroy Donald Johnson, Sarah Anne Lemke.
Application Number | 20090324693 12/164872 |
Document ID | / |
Family ID | 41447752 |
Filed Date | 2009-12-31 |
United States Patent
Application |
20090324693 |
Kind Code |
A1 |
Lemke; Sarah Anne ; et
al. |
December 31, 2009 |
Delivery Product for Topical Compositions
Abstract
A delivery product is used to deliver a skin composition to the
skin of a user. The delivery product includes a thermo-responsive
polymer film. The polymer film is solid at room temperature but,
once contacted with the skin, increases in temperature and
degrades. A skin composition is associated with the polymer film.
The skin composition can be applied to a surface of the film or can
be incorporated into the film. The skin composition is released by
the polymer film for treating the skin of the user.
Inventors: |
Lemke; Sarah Anne;
(Appleton, WI) ; Johnson; Kroy Donald; (Neenah,
WI) |
Correspondence
Address: |
DORITY & MANNING, P.A.
POST OFFICE BOX 1449
GREENVILLE
SC
29602-1449
US
|
Assignee: |
Kimberly-Clark Worldwide,
Inc.
Neenah
WI
|
Family ID: |
41447752 |
Appl. No.: |
12/164872 |
Filed: |
June 30, 2008 |
Current U.S.
Class: |
424/443 |
Current CPC
Class: |
A61F 13/8405 20130101;
A61L 2300/602 20130101; A61L 2300/404 20130101; A61L 15/64
20130101; A61P 31/04 20180101; A61L 15/44 20130101; A61P 17/00
20180101; A61L 15/42 20130101; A61L 15/34 20130101 |
Class at
Publication: |
424/443 |
International
Class: |
A61K 9/70 20060101
A61K009/70 |
Claims
1. A delivery product for topical skin compositions comprising: a
thermo-responsive polymer film, the thermo-responsive polymer film
being solid at a temperature of 23.degree. C.; a topical skin
composition in association with the thermo-responsive polymer film,
the topical skin composition containing a skin care active, a
medicament or mixtures thereof; and wherein the thermo-responsive
polymer film changes properties at a temperature greater than
23.degree. C. but less than about 37.degree. C. so as to cause the
solid film to degrade such that when the delivery product is placed
in contact with a person's skin, the thermo-responsive polymer film
increases in temperature and the film degrades.
2. A delivery product as defined in claim 1, wherein the
thermo-responsive polymer film changes properties at a temperature
of from about 30.degree. C. to about 34.degree. C.
3. A delivery product as defined in claim 1, wherein the
thermo-responsive polymer film comprises a chitosan.
4. A delivery product as defined in claim 1, wherein the
thermo-responsive polymer film comprises a polyacrylic acid or
derivatives thereof.
5. A delivery product as defined in claim 1, wherein the
thermo-responsive polymer film comprises a N,N-dialkylacrylamide
copolymer.
6. A delivery product as defined in claim 1, wherein the
thermo-responsive polymer film comprises an encapsulated paraffin
wax.
7. A delivery product as defined in claim 1, wherein the
thermo-responsive polymer film is substantially water
insoluble.
8. A delivery product as defined in claim 1, wherein the skin care
active or the medicament comprises an antibacterial agent, a
deodorant, a skin moisturizer, a cleanser, an anti-itch agent, a
cooling agent, a diaper rash agent, or mixtures thereof.
9. A delivery product as defined in claim 1, wherein the
thermo-responsive polymer film is laminated to a releasable backing
layer that is configured to be separated from the thermo-responsive
polymer film when the thermo-responsive polymer film is applied to
a person's skin.
10. A delivery product as defined in claim 1, wherein, once the
thermo-responsive polymer film is placed on a surface at a
temperature of 34.degree. C. in an ambient environment, the
thermo-responsive polymer film takes at least 30 minutes to
completely degrade.
11. A delivery product as defined in claim 1, wherein the
thermo-responsive polymer film does not contain a skin adhesive on
any surface thereof.
12. A delivery product as defined in claim 1, wherein the
thermo-responsive polymer film is comprised of an interpenetrating
polymer network.
13. A system for delivering a topical skin composition comprising:
an absorbent article configured to be placed adjacent to the skin
of a wearer, the absorbent article including an interior surface
configured to be placed adjacent to the skin and an opposite
exterior surface; and an insert that is manually positioned on the
interior surface of the absorbent article for contact with the
wearer's skin, the insert comprising a delivery product defined in
claim 1.
14. A system as defined in claim 13, wherein the absorbent article
comprises a diaper or a pant.
15. A system as defined in claim 13, wherein the absorbent article
comprises a feminine hygiene pad.
16. A system as defined in claim 13, wherein the absorbent article
comprises an adult incontinence garment.
17. A system as defined in claim 13, wherein the absorbent article
comprises a wound dressing.
18. A system as defined in claim 14, wherein the skin care active
or medicament contained in the topical skin composition comprises a
diaper rash agent.
19. A system as defined in claim 13, wherein the thermo-responsive
polymer film comprises a polyacrylic acid or derivative thereof, or
a N,N-dialkylacrylamide copolymer.
20. A system as defined in claim 13, wherein the thermo-responsive
polymer film comprises an encapsulated paraffin wax.
21. A system as defined in claim 13, wherein the thermo-responsive
polymer film is substantially water insoluble.
22. A system as defined in claim 13, wherein the skin care active
or the medicament comprises an antibacterial agent, a deodorant, a
skin moisturizer, a cleanser, an anti-itch agent, a cooling agent,
a diaper rash agent, or mixtures thereof.
23. A system as defined in claim 13, wherein the thermo-responsive
polymer film is laminated to a releasable backing layer, the
releasable backing layer being removed from the thermo-responsive
polymer film when the insert is manually positioned on the interior
surface of the absorbent article.
24. A delivery product as defined in claim 1, wherein the topical
skin composition is incorporated into the thermo-responsive polymer
film.
Description
BACKGROUND
[0001] There are a variety of products that are applied topically
to the skin. Some products are applied to the skin, for instance,
for cosmetic purposes or in order to otherwise provide a benefit to
the skin. Other topical skin compositions are applied to the skin
in order to treat an ailment or skin condition. For example,
various diaper rash creams are available that are designed to
either treat a diaper rash or to otherwise relieve symptoms caused
by diaper rash.
[0002] Many topical skin compositions are applied to the skin in
the form of a cream, lotion or gel. These products, for instance,
are typically applied to one's hand or to an applicator and then
applied to the area of the skin where the topical composition is
desired. In many instances, however, the skin to be treated is
fragile or easily irritated when touched. In addition, applying
topical compositions by hand can be messy in some circumstances and
creating waste by leaving some of the composition on the hands of
the user or on an applicator.
[0003] In view of the above, a need currently exists for a delivery
device capable of applying topical compositions to the skin that
avoids the messes and inefficiencies commonly associated with
creams and lotions. A need also exists for a delivery device
capable of applying a topical composition to the skin in a careful
and controlled manner that does not irritate the area where the
topical composition is applied.
SUMMARY
[0004] In general, the present disclosure is directed to a delivery
product for a topical skin composition. The delivery product can be
used to apply any suitable composition to the skin, such as any
skin care active or medicament. Of particular advantage, the
topical composition can be applied to the skin without having to
touch or rub the skin with one's hand. The delivery product can
also be tailored so as to release any active ingredients contained
in the topical composition over a desired period of time.
[0005] For example, in one embodiment, the delivery product
includes a thermo-responsive polymer film. The thermo-responsive
polymer film is solid at ambient temperature, such as at a
temperature of 23.degree. C. The thermo-responsive polymer film,
however, contains a material that changes properties when increased
in temperature. For example, in one embodiment, the film may
contain a polymer that changes properties at a temperature greater
than 23.degree. C. and less than the normal body temperature of an
individual, such as about 37.degree. C. For example, in one
embodiment, a material such as a polymer may be present in the film
that changes properties at a temperature of from about 30.degree.
C. to about 37.degree. C. When the material changes properties, the
thermo-responsive polymer film degrades. As used herein, the term
degrade means that the polymer film loses its structural integrity.
For example, the polymer film may disintegrate into smaller pieces,
turn into a liquid, be absorbed by the skin, or be absorbed into an
adjacent garment.
[0006] In accordance with the present disclosure, the delivery
product further includes a topical skin composition in association
with the thermo-responsive polymer film. For example, the topical
composition may be incorporated into the polymer film, may be
applied to a surface of the polymer film, or otherwise attached to
or connected to the film. The topical skin composition can contain,
for example, a skin care active, a medicament, or mixtures
thereof.
[0007] The delivery product is used by applying the
thermo-responsive polymer film to the skin of a user. The film, for
instance, can be applied directly to the skin or, alternatively,
can be placed in an absorbent article for contact with the skin
when the article is donned. Once contacted with the skin, the
thermo-responsive polymer film increases in temperature due to
absorbing body heat. Consequently, the thermo-responsive polymer
film degrades releasing the topical skin composition or otherwise
disassociating from the topical skin composition.
[0008] In one embodiment, the thermo-responsive polymer film can be
made from any suitable polymer or mixture of polymers that are
solid at room temperature and then sensitive to temperature
increases that cause the delivery product to degrade when contacted
with a person's skin. Examples of polymers that may be used, for
instance, include chitosan, polyacrylic acid or derivatives, a
N,N-dialkylacrylamide copolymer, a wax such as a paraffin wax,
mixtures thereof, and the like. In one embodiment, the
thermo-responsive polymer film is substantially water insoluble.
Thus, delivery of the topical composition can be controlled
exclusively by temperature. When water insoluble, the delivery
product can continue to release the topical composition even after
being wetted.
[0009] The topical skin composition contained in the polymer film
can change dramatically depending upon the particular application.
In general, any suitable composition that is be applied to the skin
can be used. Without limitation, for instance, examples of skin
care actives and medicaments that may be incorporated into the
topical skin composition include antibacterial agents, deodorants,
skin moisturizers, cleansers, anti-itch agents, cooling agents,
diaper rash agents, and the like. Further, it should be understood
that the topical skin composition can also contain mixtures of
different skin care actives and medicaments. For instance, an
anti-itch agent may be combined with other medicaments that serve
as active agents to treat the skin.
[0010] In addition to the delivery product itself, the present
disclosure is also directed to a system for delivering a topical
skin composition. The system can include, for instance, an
absorbent article configured to be placed adjacent to the skin of a
wearer. The absorbent article may include an interior surface that
is placed adjacent to the skin and an opposite exterior surface.
The system can further comprise an insert that is separate from the
absorbent article but can be manually positioned on the interior
surface of the absorbent article for contact with the wearer's skin
in the desired area. The insert, for instance, may comprise the
delivery product as described above.
[0011] In general, any suitable absorbent article can be used with
the insert. The absorbent article may comprise, for instance, a
diaper, a training pant, absorbent swimwear, feminine hygiene pads,
an adult incontinence product, or a wound dressing.
[0012] In one embodiment, the insert to be used with the absorbent
article can include the thermo-responsive polymer film laminated to
a releasable backing layer. The releasable backing layer, for
instance, can be configured to be separated from the polymer film
when the polymer film is applied to the absorbent article.
[0013] Of particular advantage, the delivery product can be made so
as to adhere to the skin or can be used in conjunction with the
absorbent article so that no adhesive, such as a body adhesive, is
necessary for maintaining contact between the polymer film and the
skin of the user. The thermo-responsive polymer film can also be
tailored to degrade over a desired period of time. In one
embodiment, for instance, the thermo-responsive polymer film may be
constructed so that if the film is placed on a surface at a
temperature of 34.degree. C. in an ambient environment, the film
takes at least 30 minutes to complete degrade.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] A full and enabling disclosure of the present invention,
including the best mode thereof to one skilled in the art, is set
forth more particularly in the remainder of the specification,
including reference to the accompanying figures, in which:
[0015] FIG. 1 is a perspective view of one embodiment of a delivery
product made in accordance with the present disclosure;
[0016] FIG. 2 is a perspective view of one embodiment of an
absorbent article that may be used in association with the delivery
product of the present disclosure;
[0017] FIG. 3 is another perspective view of the absorbent article
illustrated in FIG. 2;
[0018] FIG. 4 is a plan view of the exterior surface of the
absorbent garment illustrated in FIG. 2;
[0019] FIG. 5 is a plan view of the absorbent article illustrated
in FIG. 2; and
[0020] FIG. 6 is a perspective view of one embodiment of a feminine
hygiene product that may be used in association with the delivery
product of the present disclosure.
[0021] Repeat use of reference characters in the present
specification and drawings is intended to represent the same or
analogous features or elements of the present invention.
DETAILED DESCRIPTION
[0022] It is to be understood by one of ordinary skill in the art
that the present discussion is a description of exemplary
embodiments only, and is not intended as limiting the broader
aspects of the present invention.
[0023] In general, the present disclosure is directed to a delivery
product for topical skin compositions. The delivery product
comprises a thermo-responsive polymer film that is solid at ambient
temperatures, such as at 23.degree. C. The thermo-responsive film
is placed in association with a topical skin composition that is
intended to contact the skin for providing some benefit. In
accordance with the present disclosure, the thermo-responsive film
is constructed such that, when contacted with the skin of a user,
the film increases in temperature due to the transfer of body heat
and then degrades once heated to a certain temperature. As the
polymer film degrades or prior to degrading, the topical skin
composition is released for interaction with the skin.
[0024] The skin delivery product of the present disclosure can
provide various advantages and benefits. For example, the delivery
product can provide a gentle method for applying skin compositions
to fragile, compromised or damaged skin that is sensitive to the
touch, torn or bruised easily.
[0025] Although the delivery product may be used alone, in one
embodiment, the delivery product may be used in conjunction with an
absorbent article. For instance, the delivery product may be placed
within an absorbent article in order to not only deliver a topical
composition to the skin but may also assist in treating hard to
reach areas such as in the perineal region. For example, by placing
the delivery device in an absorbent article, the skin composition
is applied by donning the article making the delivery product
particularly well suited for use by those with compromised
dexterity or strength, especially when the skin composition is to
be applied to areas not easily accessible by hand. Applying the
delivery product in association with an absorbent article is also a
very delicate and gentle way to deliver a skin composition to those
with fragile skin, such as the elderly, and those that have skin
problems related to conditions such as diabetes.
[0026] In one embodiment, the delivery product is maintained
separate from the absorbent article and used as an insert when
desired. Thus, a caregiver or wearer of the absorbent article can
choose when to apply the delivery product and to only use the
delivery product when needed.
[0027] Also of advantage is that the delivery product can treat the
skin of a user with a skin composition without any related mess.
For example, skin compositions in the form of gels, pastes and
creams are typically applied to the skin by first applying the
composition onto one's hand. After application, some of the
composition remains on the hand which not only requires the hands
to be cleaned but also represents wasted material. Spray
applicators also tend to cover more than the desired area creating
waste. The delivery product of the present disclosure, on the other
hand, avoids the above problems.
[0028] As will be described in greater detail below, the delivery
product of the present disclosure can also be tailored to deliver a
skin composition over a desired duration of time. For instance, the
thermo-responsive film can be formulated and constructed so as to
degrade either quickly or relatively slowly based upon the film
chemistry. Topical compositions, on the other hand, must be
reapplied at periodic intervals in order to achieve the same
effect.
[0029] Referring to FIG. 1, one embodiment of a delivery product 10
made in accordance with the present disclosure is shown. As
illustrated, the delivery product 10 includes a thermo-responsive
film 12 associated with a topical skin composition. Optionally, the
thermo-responsive film 12 can be associated with one or more
releasable backing layers, such as backing layer 14. The backing
layer 14 is configured to be removed from the thermo-responsive
polymer film 12 when the film is applied to the skin or to an
absorbent article. In the embodiment illustrated in FIG. 1, a
single backing layer 14 is shown. In alternative embodiments,
however, the thermo-responsive film 12 may be positioned in between
two opposing backing layers.
[0030] The backing layer 14, for instance, can be made from any
suitable material capable of protecting the thermo-responsive film
while easily separating from the film. The backing layer 14, for
instance, may comprise a polymer film or paper layer coated with a
release material, such as a silicone or wax.
[0031] The thermo-responsive polymer film 12 is generally made from
one or more polymers. At least one material contained in the film
is temperature sensitive such that the film changes properties when
heated. The material can be a polymer used to form the film or
another material present in the polymer matrix.
[0032] More particularly, the thermo-responsive film 12 made
according to the present disclosure is constructed such that the
film is a solid at ambient temperature, which is typically about
23.degree. C. The thermo-responsive film, however, is also
constructed such that the film begins to degrade at close to body
temperature. The term "body temperature" is the temperature at the
skin's surface of a user. For humans, the body temperature is
typically about 34.degree. C..+-.3.degree. C. Thus, body
temperature can be from about 31.degree. C. to about 37.degree. C.
Consequently, the thermo-responsive polymer film is constructed
such that the film will begin to degrade at a temperature of
greater than 23.degree. C. but less than about 34.degree. C. For
example, in one embodiment, the thermo-responsive polymer film may
be constructed such that the film degrades at a temperature of from
about 27.degree. C. to about 34.degree. C., and particularly from
about 29.degree. C. to about 31.degree. C.
[0033] In this manner, once the thermo-responsive polymer film is
applied to the skin, the film absorbs the heat being given off by
the skin and increases in temperature to approximately the body
temperature of the user. Once heated to a particular threshold
temperature, the film then degrades. The topical skin composition
associated with the film can be released from the film upon contact
with the skin or may be released from the film as the film
degrades.
[0034] The thermo-responsive polymer film can degrade in various
ways. For instance, in one embodiment, the thermo-responsive
polymer film may convert to a liquid when heated above ambient
temperatures. In an alternative embodiment, the film may simply
disintegrate into smaller particles. In still another embodiment,
the film may degrade and be absorbed by the skin. In yet another
embodiment, the film may degrade and be absorbed into the clothing
of the user or into an absorbent article associated with the
product.
[0035] In one embodiment, the thermo-responsive polymer film
contains at least one or more temperature sensitive polymers. In
general, any suitable temperature sensitive polymer may be used
that is capable of being a solid at ambient temperature but
changing physical properties at the temperature ranges described
above. Examples of some polymers that may be used to construct the
film may include, for instance, any suitable wax. The wax, for
instance, may comprise a paraffin wax that changes from a solid to
a liquid when heated above ambient temperature.
[0036] Other exemplary materials that may be used include a
chitosan, a polyacrylic acid or derivative, a N,N-dialkylacrylamide
copolymer or blend, and the like.
[0037] In one embodiment, the thermo-responsive polymer film may be
made from a thermo-responsive polymer that is an interpenetrating
polymer network. Suitable interpenetrating polymer networks may be
formed, for instance, from a polyacrylic acid and a block
copolymer. The block copolymer, for instance, may be a polyethylene
oxide/polypropylene oxide block copolymer. Another embodiment of an
interpenetrating polymer network may be formed from a random
copolymer of a methyacrylamide derivative and a comonomer to form a
thermally reversible solid at room temperature. The random
copolymer may be in the form of a plurality of linear chains having
a plurality of molecular weights greater than or equal to a minimum
gelling molecular weight cutoff.
[0038] In still another embodiment, an interpenetrating polymer
network may be used that comprises a reversible solid based on
NiPAAM and copolymers that do not reverse upon dilution. Such
polymers are described, for instance, in U.S. Pat. No. 5,262,055,
which is incorporated herein by reference.
[0039] Another example of an interpenetrating polymer network may
comprise polymethylvinyl ether families. In still another
embodiment, the polymer network may be formed from a cationic
chitosan made thermally sensitive by the addition of a salt, such
as polyol salts (.beta.-glycerophosphate).
[0040] In one embodiment, the thermo-responsive polymer film may
contain a phase change component alone or in combination with other
materials that causes the film to degrade when heated near body
temperature. Phase change components that may be used include
LURAPRET.RTM. phase change powder, a purified, encapsulated
paraffin available from BASF Corporation of New Jersey,
hydrocarbons (e.g., straight chain alkanes or paraffinic
hydrocarbons, branched-chain alkanes, unsaturated hydrocarbons,
halogenated hydrocarbons, and alicyclic hydrocarbons), waxes, oils,
fatty acids, fatty acid esters, dibasic acids, dibasic esters,
1-halides, primary alcohols, aromatic compounds, anhydrides (e.g.,
stearic anhydride), ethylene carbonate, polyhydric alcohols (e.g.,
2,2-dimethyl-1,3-propanediol,
2-hydroxymethyl-2-methyl-1,3-propanediol, ethylene glycol,
polyethylene glycol, pentaerythritol, dipentaerythritol,
pentaglycerine, tetramethylol ethane, neopentyl glycol,
tetramethylol propane, monoaminopentaerythritol,
diaminopentaerythritol, and tris(hydroxvmethyl)acetic acid),
polymers (e.g., polyethylene, polyethylene glycol, polypropylene,
polypropylene glycol, polytetramethylene glycol, and copolymers,
such as polyacrylate or poly(meth)acrylate with alkyl hydrocarbon
side chain or with polyethylene glycol side chain and copolymers
comprising polyethylene, polyethylene glycol, polypropylene,
polypropylene glycol, or polytetramethylene glycol), and mixtures
thereof.
[0041] Using a thermo-responsive polymer film as described above
can provide various advantages in particular applications. For
example, although many of the materials described above are
temperature sensitive, the film can be constructed so as to be
substantially water insoluble. Thus, the films will only degrade
when elevated in temperature and will resist degrading when
contacted with moisture. The films may contact moisture, for
instance, from the surface of the skin or from the environment in
which they are used. When used in an absorbent article, the
delivery product may contact body fluids without degrading and
still delivering the skin composition. This feature makes the
delivery product particularly well suited for use in diapers and
adult incontinence products for treating skin ailments, such as
diaper rash.
[0042] The thermo-responsive polymer film in addition to being
water insoluble can be constructed so as to degrade over a desired
period of time by changing or altering the components and their
relative amounts. For example, in one embodiment, the
thermo-responsive polymer film can be configured to degrade very
quickly (such as less than about 10 minutes) when elevated in
temperature. Alternatively, polymers and other materials can be
chosen to form the film that cause the film to degrade relatively
slowly. For example, in one embodiment, a thermo-responsive polymer
may be combined with a polymer that is not temperature sensitive in
forming the film. In one embodiment, for instance, the
thermo-responsive polymer film may be constructed such that when
the product is placed on a surface at a temperature of 34.degree.
C. in an ambient environment, the film takes at least 30 minutes,
such as at least 40 minutes, such as at least 60 minutes, such as
from about 30 minutes to about 120 minutes to completely
degrade.
[0043] In addition to the thermo-responsive polymer film, the
delivery product of the present disclosure includes a topical skin
composition associated with the film. The topical skin composition
can be associated with the film in various different ways. For
example, in one embodiment, the skin composition can be
incorporated into the film. In this manner, the skin composition is
embedded in the film and is released as the film degrades.
[0044] Alternatively, the skin composition can be coated on the
film. In this embodiment, the composition is immediately released
to the skin as the film degrades.
[0045] In still another embodiment, a skin composition may be
incorporated into the film while a second skin composition may be
applied to the film as a coating.
[0046] The thermo-responsive polymer film can be used to deliver
any suitable skin composition depending upon the particular
application and the desired result. Particular examples of
materials or ingredients that may be included in the skin
composition include any suitable skin care active, medicament, or
mixtures thereof. Particular components contained in the
composition may include, for instance, antibacterial agents,
deodorants, skin moisturizers, skin cleansers, anti-itch agents,
cooling agents, diaper rash agents, or mixtures thereof.
[0047] Other ingredients or components that may also be contained
within the delivery product include antioxidants (product
integrity); anti-reddening agents, such as aloe extract;
astringents--cosmetic (induce a tightening or tingling sensation on
skin); astringents--drug (a drug product which checks oozing,
discharge, or bleeding when applied to skin or mucous membrane and
works by coagulating protein); biological additives, including
botanical chemicals and proteins (enhance the performance or
consumer appeal of the product); external analgesics (a topically
applied drug that has a topical analgesic, anesthetic, pain
reliever or antipruritic effect by depressing cutaneous sensory
receptors, of that has a topical counterirritant effect by
stimulating cutaneous sensory receptors); hydrotropes (helps
dissolve some antimicrobial agents); opacifiers (reduce the clarity
or transparent appearance of the product); skin conditioning
agents; skin exfoliating agents (ingredients that increase the rate
of skin cell turnover such as alpha hydroxy acids and beta
hydroxyacids); skin protectants (a drug product which protects
injured or exposed skin or mucous membrane surface from harmful or
annoying stimuli); natural moisturizing factors, amino acids,
anti-inflammatory agents, sunscreens, insect repellants,
antiperspirants, vitamins (e.g. Vitamin B, C or E), and the
like.
[0048] In one embodiment, the topical skin composition may be for
moisturizing the skin and may contain a humectant. Humectants are
typically cosmetic ingredients used to increase the water content
of the top layers of the skin or mucous membrane, by helping
control the moisture exchange between the product, the skin, and
the atmosphere. Humectants may include primarily hydroscopic
materials. Suitable humectants include urocanic acid, N-Acetyl
ethanolamine, aloe vera gel, arginine PCA, chitosan PCA, copper
PCA, Corn glycerides, dimethyl imidazolidinone, fructose,
glucamine, glucose, glucose glutamate, glucuronic acid, glutamic
acid, glycereth-7, glycereth-12, glycereth-20, glycereth-26,
glycerin, honey, hydrogenated honey, hydrogenated starch
hydrolysates, hydrolyzed corn starch, lactamide MEA, lactic acid,
lactose lysine PCA, mannitol, methyl gluceth-10, methyl gluceth-20,
PCA, PEG-2 lactamide, PEG-10 propylene glycol, polyamino acids,
polysaccharides, polyamino sugar condensate, potassium PCA,
propylene glycol, propylene glycol citrate, saccharide hydrolysate,
saccharide isomerate, sodium aspartate, sodium lactate, sodium PCA,
sorbitol, TEA-lactate, TEA-PCA, Urea, Xylitol, and the like and
mixtures thereof. Preferred humectants include polyols, glycerin,
ethoxylated glycerin, polyethylene glycols, hydrogenated starch
hydrolsates, propylene glycol, silicone glycol, pyrrolidone
carboxylic acid and mixtures thereof.
[0049] In one embodiment, the topical skin composition may contain
a surfactant that promotes emulsifying activity. Surfactants have
the ability to lower the surface tension of water to reduce the
interfacial tension between two immiscible substances. Surfactants
can also enhance cleaning or removal of dirt, sweat, and/or sebum
from the skin. Some surfactants may also act as a wetting agent to
facilitate absorption of other components. As examples, surfactants
may be selected from groups of sorbitan fatty acids (sorbitan
monopalmitate, sorbitan monolaurate and the like), polyoxyethylene
sorbitan fatty acid esters (polyoxyethylene 20 sorbitan
monolaurate, polyoxyethylene sorbitan 20 monostearate,
polyoxyethylene 4 sorbitan monostearate and the like),
polyoxyethylene acids (polyoxyethylene 8 stearate, polyoxyethylene
20 stearate, and the like), and polyoxyethylene alcohols
(polyoxyethylene 4 lauryl ether, polyoxyethylene 10 cetyl ether,
polyoxyethylene 10 stearyl ether, polyoxyethylene 5.5 decyl ether,
and the like), but the surfactant(s) can be selected from any
suitable surfactants.
[0050] As described above, in one embodiment, a cooling agent may
be incorporated into the skin composition. Cooling agents cool the
skin by various techniques, such as by evaporation. For example,
water may serve as a cooling agent. Suitable cooling agents that
may be used include water; hydrocarbons such as isododecane and
isoeicosane; short chain alcohols such as ethanol and n-propanol;
small branched chain alcohols such as isopropyl alcohol;
fluorinated hydrocarbons such as perfluorodecalin,
perfluoroheptane, perfluorohexane, and perfluoromethylcyclohexane;
fluorinated alcohols such as C6-C12 perfluoroalkylethanol and
perfluorocyclohexylmethanol; fluorinated ethers such as ethyl
perfluorobutyl ether, ethyl perfluoroisobutyl ether, methyl
perfluorobutyl ether, methyl perfluoroisobutyl ether, and
perfluorohexylethyl dimethylbutyl ether; low molecular weight
grades of dimethicone, particularly DOW CORNING.RTM. 200
dimethicone fluid 0.65 cst; volatile cyclomethicones such as
octamethyl cyclotetrasiloxane, decamethyl cyclopentasiloxane,
dodecamethyl cyclohexasiloxane, and tetradecamethyl
cycloheptasiloxane.
[0051] Another particular ingredient that may be present in the
skin composition is a liquid powder. Liquid powders create a silky
and powdery feel on the skin. In one embodiment, for instance, the
liquid powder may comprise a volatile silicone. The term "volatile"
refers to those materials having a measurable pressure at ambient
conditions. In one embodiment, the volatile silicone has a low
molecular weight. Volatile polyorganosiloxanes useful herein may be
cyclic or linear. Suitable cyclic silicones include
polydimethysiloxanes containing from about 4 to about 8 silicon
atoms and an equal number of oxygen atoms in the ring (i.e. D4 to
D8). The straight chain silicones that are suitable for the
composition include those with a viscosity equal to or less than
about 5 centistokes.
[0052] The cyclic silicones suitable for use are generally known as
cyclomethicones. In one embodiment, the volatile silicone is
cyclomethicone, more specifically cyclopentasiloxane, a compound
sold commercially under the name DOW CORNING 245 (distributed by
Dow Corning Corp.).
[0053] In another embodiment, the composition comprises a low
viscosity dimethicone, for example, a linear polysiloxane. One
example of a commercially available low viscosity dimethicone, for
instance, is DOW CORNING 200 dimethicone available from the Dow
Corning Corp. DOW CORNING 200 dimethicone has a viscosity of about
5 centistoke. Other suitable volatile silicones for use include,
for example, cyclomethicones of varying viscosities, e.g., DOW
CORNING 244, DOW CORNING 344, and DOW CORNING 345 (commercially
available from Dow Corning Corp.); SF-1204 and SF-1202 Silicone
Fluids (commercially available from G.E. Silicones), Silicone 7207
and Silicone 7158 (commercially available from Union Carbide
Corp.); and SWS-03314 (commercially available from SWS Silicones
Corp.).
[0054] In one embodiment, especially when the delivery product is
to be used in conjunction with an absorbent article, the skin
composition may contain a diaper rash agent which may be configured
to form at least a partial skin barrier. Suitable compounds that
serve as diaper rash agents include zinc oxide, a nonvolatile
dimethicone, allantoin, cod liver oil, colloidal oatmeal, kaolin,
lanolin, petrolatum, topical starch, or mixtures thereof.
[0055] In one embodiment, the skin composition may contain a
sunscreen agent. Some examples of sunscreen agents that may by
incorporated into the composition are: aminobenzoic acis (PABA),
avobenzone, cinoxate, dioxybenzone, homosalate, menthyl
anthranilate, octocrylene, octyl methoxycinnamate, octyl
salicylate, benzophenone-3, ethylhexy dimethyl PABA,
phenylbenzimidole sulfonic acid, benzophenone-4, and trolamine
salicylate. The composition may also include but is not limited to
all current monographed organic sunscreens both oil and water
soluble.
[0056] In one embodiment, the skin composition may include an
additive that regulates the release of one or more components from
the film, in addition to the film itself. Such additives may
provide for long term delivery of one or more components contained
in the film. The appropriate amount of such an additive will depend
on the desired rate and duration of the release. Examples of such
additives include water insoluble polymers such as ethylcellulose,
acrylic resins, copolymers of methacrylic acid and acrylic acid
ethyl ester, polylactic acid, polylactic-co-glycolic acid,
polyurethane, polyethylene vinyl acetate copolymer, and
polystyrene-butadiene copolymers.
[0057] Other additives that may be present in the skin composition
include lubricants, plasticizing agents, preservatives, thickeners,
emulsion stabilizers, stick formers, suppository formers, coloring
agents, chelating agents, fragrances, viscosity controlling agents,
and pH-adjusting agents.
[0058] Thickeners that may be used in the skin composition include
various modified celluloses. For instance, the thickener may
comprise ethylcellulose, hydroxypropyl cellulose, carboxymethyl
cellulose, hydroxypropylmethyl cellulose, hydroxyethylmethyl
cellulose, and combinations thereof. Additionally, fumed silica may
serve as a thickener.
[0059] The relative amount of the topical skin composition present
in the delivery product of the present disclosure can vary
dramatically depending upon the particular application and the
materials used to construct the product. In general, the skin
composition is present in the product in an amount from about 0.5%
to about 80% by weight. When the topical skin composition is
applied topically to the film, even greater amounts may be
present.
[0060] For exemplary purposes only, the following is a list of
particular skin care actives or medicaments that may be present in
the delivery product and exemplary weight percentages: Allantoin,
0.5 to 2 percent; Aluminum hydroxide gel, 0.15 to 5 percent;
Calamine, 1 to 25 percent; Cocoa butter, 50 to 80 percent; Cod
liver oil, 5 to 13.56 percent; Dimethicone, 1 to 30 percent;
Glycerin, 20 to 45 percent; Kaolin, 4 to 20 percent; Lanolin, 12.5
to 50 percent; Petrolatum, 30 to 80 percent; Topical starch, 10 to
80 percent; Zinc acetate, 0.1 to 2 percent; Zinc carbonate, 0.2 to
2 percent; Zinc oxide, 1 to 25 percent.
[0061] In order to apply the delivery product to the skin, surface
tension only may be used to maintain contact between the delivery
product and the skin in a desired area. Although a skin adhesive
may be used in certain embodiments, in one embodiment, no such
adhesive is present in the product. Skin adhesives, for instance,
are not typically needed when the product is used in conjunction
with an absorbent article. In particular, the absorbent article can
be used to maintain contact between the delivery product and the
skin.
[0062] As described above, in one embodiment, the delivery product
of the present disclosure can be used as an insert in association
with an absorbent article. For example, referring to FIGS. 2-5, for
exemplary purposes, an absorbent article 20 that may be used in
association with the delivery product 10 is shown. The absorbent
article 20 may or may not be disposable. In the figures, a diaper
is shown. It should be understood, however, that the delivery
product is suitable for use with various other absorbent articles
intended for personal wear, including but not limited to training
pants, swim pants, feminine hygiene products, incontinence
products, medical garments, surgical pads and bandages, other
personal care or healthcare garments, and the like without
departing from the scope of the invention.
[0063] By way of illustration only, various materials and methods
for constructing absorbent articles such as the article 20 of the
various aspects of the present invention are disclosed in PCT
Patent Application WO 00/37009 published Jun. 29, 2000 by A.
Fletcher et al; U.S. Pat. No. 4,940,464 issued Jul. 10, 1990 to Van
Gompel et al.; U.S. Pat. No. 5,766,389 issued Jun. 16, 1998 to
Brandon et al., and U.S. Pat. No. 6,645,190 issued Nov. 11, 2003 to
Olson et al. which are incorporated herein by reference to the
extent they are consistent (i.e., not in conflict) herewith.
[0064] An absorbent article 20 is representatively illustrated in
FIG. 2 in a partially fastened condition. The absorbent article 20
shown in FIGS. 2 and 3 is also represented in FIGS. 4 and 5 in an
opened and unfolded state. Specifically, FIG. 4 is a plan view
illustrating the exterior side of the absorbent article 20, while
FIG. 5 illustrates the interior side of the absorbent article 20.
As shown in FIGS. 4 and 5, the absorbent article 20 defines a
longitudinal direction 48 that extends from the front of the
article when worn to the back of the article. Opposite to the
longitudinal direction 48 is a lateral direction 49.
[0065] The absorbent article 20 defines a pair of longitudinal end
regions, otherwise referred to herein as a front region 22 and a
back region 24, and a center region, otherwise referred to herein
as a crotch region 26, extending longitudinally between and
interconnecting the front and back regions 22, 24. The absorbent
article 20 also defines an inner surface 28 adapted in use (e.g.,
positioned relative to the other components of the article 20) to
be disposed toward the wearer, and an outer surface 30 opposite the
inner surface. The front and back regions 22, 24 are those portions
of the absorbent article 20, which when worn, wholly or partially
cover or encircle the waist or mid-lower torso of the wearer. The
crotch region 26 generally is that portion of the absorbent article
20 which, when worn, is positioned between the legs of the wearer
and covers the lower torso and crotch of the wearer. The absorbent
article 20 has a pair of laterally opposite side edges 36 and a
pair of longitudinally opposite waist edges, respectively
designated front waist edge 38 and back waist edge 39.
[0066] The illustrated absorbent article 20 includes a chassis 32,
that, in this embodiment, encompasses the front region 22, the back
region 24, and the crotch region 26. Referring to FIGS. 2-5, the
chassis 32 includes an outer cover 40 and a bodyside liner 42
(FIGS. 2 and 5) that may be joined to the outer cover 40 in a
superimposed relation therewith by adhesives, ultrasonic bonds,
thermal bonds or other conventional techniques. Referring to FIG.
5, the liner 42 may suitably be joined to the outer cover 40 along
the perimeter of the chassis 32 to form a front waist seam 62 and a
back waist seam 64. As shown in FIG. 5, the liner 42 may suitably
be joined to the outer cover 40 to form a pair of side seams 61 in
the front region 22 and the back region 24. The liner 42 can be
generally adapted, i.e., positioned relative to the other
components of the article 20, to be disposed toward the wearer's
skin during wear of the absorbent article. The chassis 32 may
further include an absorbent structure 44 particularly shown in
FIG. 5 disposed between the outer cover 40 and the bodyside liner
42 for absorbing liquid body exudates exuded by the wearer, and may
further include a pair of containment flaps 46 secured to the
bodyside liner 42 for inhibiting the lateral flow of body
exudates.
[0067] The elasticized containment flaps 46 as shown in FIG. 5
define a partially unattached edge which assumes an upright
configuration in at least the crotch region 26 of the absorbent
article 20 to form a seal against the wearer's body. The
containment flaps 46 can extend longitudinally along the entire
length of the chassis 32 or may extend only partially along the
length of the chassis. Suitable constructions and arrangements for
the containment flaps 46 are generally well known to those skilled
in the art and are described in U.S. Pat. No. 4,704,116 issued Nov.
3, 1987 to Enloe, which is incorporated herein by reference.
[0068] To further enhance containment and/or absorption of body
exudates, the absorbent article 20 may also suitably include leg
elastic members 58 (FIG. 5), as are known to those skilled in the
art. The leg elastic members 58 can be operatively joined to the
outer cover 40 and/or the bodyside liner 42 and positioned in the
crotch region 26 of the absorbent article 20.
[0069] In some embodiments, the absorbent article 20 may further
include a surge management layer (not shown) which may be
optionally located adjacent the absorbent structure 44 and attached
to various components in the article 20 such as the absorbent
structure 44 or the bodyside liner 42 by methods known in the art,
such as by using an adhesive. A surge management layer helps to
decelerate and diffuse surges or gushes of liquid that may be
rapidly introduced into the absorbent structure of the article.
[0070] As shown in FIGS. 2-5, the absorbent article 20 further
includes a pair of opposing elastic side panels 34 that are
attached to the back region of the chassis 32. As shown
particularly in FIGS. 2 and 3, the side panels 34 may be stretched
around the waist and/or hips of a wearer in order to secure the
garment in place. As shown in FIGS. 4 and 5, the elastic side
panels are attached to the chassis along a pair of opposing
longitudinal edges 37. The side panels 34 may be attached or bonded
to the chassis 32 using any suitable bonding technique. For
instance, the side panels 34 may be joined to the chassis by
adhesives, ultrasonic bonds, thermal bonds, or other conventional
techniques.
[0071] In an alternative embodiment, the elastic side panels may
also be integrally formed with the chassis 32. For instance, the
side panels 34 may comprise an extension of the bodyside liner 42,
of the outer cover 40, or of both the bodyside liner 42 and the
outer cover 40.
[0072] In the embodiments shown in the figures, the side panels 34
are connected to the back region of the absorbent article 20 and
extend over the front region of the article when securing the
article in place on a user. It should be understood, however, that
the side panels 34 may alternatively be connected to the front
region of the article 20 and extend over the back region when the
article is donned.
[0073] With the absorbent article 20 in the fastened position as
partially illustrated in FIGS. 2 and 3, the elastic side panels 34
may be connected by a fastening system 80 to define a 3-dimensional
diaper configuration having a waist opening 50 and a pair of leg
openings 52. The waist opening 50 of the article 20 is defined by
the waist edges 38 and 39 which encircle the waist of the
wearer.
[0074] In the embodiments shown in the figures, the side panels are
releasably attachable to the front region 22 of the article 20 by
the fastening system. It should be understood, however, that in
other embodiments the side panels may be permanently joined to the
chassis 32 at each end. The side panels may be permanently bonded
together, for instance, when forming a training pant or absorbent
swimwear.
[0075] The elastic side panels 34 each have a longitudinal outer
edge 68, a leg end edge 70 disposed toward the longitudinal center
of the absorbent article 20, and waist end edges 72 disposed toward
a longitudinal end of the absorbent article. The leg end edges 70
of the absorbent article 20 may be suitably curved and/or angled
relative to the lateral direction 49 to provide a better fit around
the wearer's legs. However, it is understood that only one of the
leg end edges 70 may be curved or angled, such as the leg end edge
of the back region 24, or alternatively, neither of the leg end
edges may be curved or angled, without departing from the scope of
the present invention. As shown in FIG. 5, the outer edges 68 are
generally parallel to the longitudinal direction 48 while the waist
end edges 72 are generally parallel to the transverse axis 49. It
should be understood, however, that in other embodiments the outer
edges 68 and/or the waist edges 72 may be slanted or curved as
desired. Ultimately, the side panels 34 are generally aligned with
a waist region 90 of the chassis.
[0076] The fastening system 80 may include laterally opposite first
fastening components 82 adapted for refastenable engagement to
corresponding second fastening components 84. In the embodiment
shown in the figures, the first fastening component 82 is located
on the elastic side panels 34, while the second fastening component
84 is located on the front region 22 of the chassis 32. In one
aspect, a front or outer surface of each of the fastening
components 82, 84 includes a plurality of engaging elements. The
engaging elements of the first fastening components 82 are adapted
to repeatedly engage and disengage corresponding engaging elements
of the second fastening components 84 to releasably secure the
article 20 in its three-dimensional configuration.
[0077] The fastening components 82, 84 may be any refastenable
fasteners suitable for absorbent articles, such as adhesive
fasteners, cohesive fasteners, mechanical fasteners, or the like.
In particular aspects the fastening components include mechanical
fastening elements for improved performance. Suitable mechanical
fastening elements can be provided by interlocking geometric shaped
materials, such as hooks, loops, bulbs, mushrooms, arrowheads,
balls on stems, male and female mating components, buckles, snaps,
or the like.
[0078] In the embodiment shown in the figures, the fastening
components 82 are attached to the side panels 34 along the edges
68. In this embodiment, the fastening components 82 are not elastic
or extendable. In other embodiments, however, the fastening
components may be integral with the side panels 34. For example,
the fastening components may be directly attached to the side
panels 34 on a surface thereof.
[0079] In addition to possibly having elastic side panels, the
absorbent article 20 may include various waist elastic members for
providing elasticity around the waist opening. For example, as
shown in the figures, the absorbent article 20 can include a front
waist elastic member 54 and/or a back waist elastic member 56.
[0080] As shown in FIGS. 2-5, the absorbent article 20 is placed in
association with a delivery device 10 made in accordance with the
present disclosure. The delivery device 10, for instance, can be a
separate insert that a user manually positions within the absorbent
article in the desired location. Having the delivery product 10
serve as an insert also gives control to the user as to when to use
the delivery product and when to use similar absorbent articles
without the delivery product.
[0081] Having the delivery product 10 comprise an insert that is
manually inserted in the article also provides advantages to the
manufacturer. For example, if the delivery product 10 contains an
over-the-counter active ingredient and the absorbent article was
sold with the delivery product already in place, various federal
and local laws may require that the article be made according to
special manufacturing conditions. In particular, the manufacturing
facility may need to be certified as an over-the-counter
manufacturing facility. By providing the delivery product 10 to
consumers separate from the absorbent article, however, no such
requirements are needed.
[0082] In FIGS. 2-5, the delivery product 10 is shown positioned
between the crotch region 26 and the front region 22. In other
embodiments, however, the delivery product may be positioned more
towards the back region 24. In still other embodiments, the
delivery product 10 may be placed around the waist opening or at
any other suitable location where skin treatment may be needed.
[0083] In the figures, the delivery product 10 is shown having a
rectangular shape. It should also be understood, however, that the
delivery product 10 can have any suitable shape. In fact, the
delivery product 10 may have a shape that conforms to the
particular area of the body where treatment is needed.
[0084] In addition to being used in conjunction with a diaper as
shown in FIGS. 2-5, the delivery product 10 may be used with any
other suitable absorbent article. For instance, referring to FIG.
6, a feminine care pad 100 is shown. Positioned on the interior
surface of the pad 100 is the delivery product 10.
[0085] These and other modifications and variations to the present
invention may be practiced by those of ordinary skill in the art,
without departing from the spirit and scope of the present
invention, which is more particularly set forth in the appended
claims. In addition, it should be understood that aspects of the
various embodiments may be interchanged both in whole or in part.
Furthermore, those of ordinary skill in the art will appreciate
that the foregoing description is by way of example only, and is
not intended to limit the invention so further described in such
appended claims.
* * * * *