U.S. patent application number 17/630081 was filed with the patent office on 2022-08-25 for cosmetic article.
This patent application is currently assigned to L'OREAL. The applicant listed for this patent is L'OREAL. Invention is credited to Philippe ILEKTI.
Application Number | 20220264980 17/630081 |
Document ID | / |
Family ID | 1000006365786 |
Filed Date | 2022-08-25 |
United States Patent
Application |
20220264980 |
Kind Code |
A1 |
ILEKTI; Philippe |
August 25, 2022 |
COSMETIC ARTICLE
Abstract
Cosmetic article (1) for application to the eyelid, the
eyelashes and/or the eyebrows, including:--at least one element (2)
to be applied,--at least one adhesive layer (5) which is at least
partially in contact with the element (2) to be applied, this
adhesive layer (5) including at least one water-resistant adhesive
material, and--at least one layer (6) for protecting the adhesive
layer (5), externally covering same and including at least one
water-soluble polymer.
Inventors: |
ILEKTI; Philippe; (Chevilly
Larue, FR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
L'OREAL |
Paris |
|
FR |
|
|
Assignee: |
L'OREAL
Paris
FR
|
Family ID: |
1000006365786 |
Appl. No.: |
17/630081 |
Filed: |
July 17, 2020 |
PCT Filed: |
July 17, 2020 |
PCT NO: |
PCT/EP2020/070338 |
371 Date: |
January 25, 2022 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A41G 5/02 20130101 |
International
Class: |
A41G 5/02 20060101
A41G005/02 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 26, 2019 |
FR |
FR1908519 |
Claims
1. Cosmetic article (1) for application to the eyelid, the
eyelashes and/or the eyebrows, including: at least one element (2)
to be applied, at least one adhesive layer (5) which is at least
partially in contact with the element (2) to be applied, this
adhesive layer (5) including at least one water-resistant adhesive
material, and at least one layer (6) for protecting the adhesive
layer (5), externally covering same and including at least one
water-soluble polymer.
2. Article (1) according to claim 1, in which the element (2) to be
applied includes a false eyelash (3) or a tuft of false eyelashes
(3), the adhesive layer (5) coated with the protective layer (6)
being located at one end of the false eyelash (3) or of the tuft of
false eyelashes (3).
3. Article (1) according to claim 1, in which the element (2) to be
applied includes a false eyelash fringe (3) and a connecting strip
(25), the false eyelashes (3) being fixed, via one end, to the
connecting strip (25), said connecting strip (25) being at least
partially covered with the adhesive layer (5).
4. Article (1) according to claim 1, in which the element (2) to be
applied includes a shell, a patch or a strip for the eyelid.
5. Article (1) according claim 1, in which the water-resistant
adhesive material is a water-resistant pressure-sensitive adhesive
(PSA) selected from the group consisting of acrylic polymers,
notably copolymers of acrylate and methacrylate, pressure-sensitive
adhesives based on rubber or based on styrene copolymers.
6. Article (1) according to claim 1, in which the protective layer
(6) includes a hydrophilic polymer, in dry form.
7. Article (1) according to claim 6, in which the hydrophilic
polymer is chosen such that its glass transition temperature
T.sub.g is greater than or equal to 30.degree. C.
8. Article (1) according to claim 1, in which said at least one
polymer of the protective layer (6) may be selected from the group
consisting of polyvinylpyrrolidones (PVP), polyvidones, povidones,
polysaccharides, and polyvinyl alcohols (PVA).
9. Article (1) according to claim 1, in which the protective layer
(6) entirely covers the adhesive layer (5) before use of the
article, uniformly.
10. Packaging assembly including at least one cosmetic article (1),
according to claim 1, and a packaging for containing same.
11. Process for manufacturing a cosmetic article (1) according to
claim 1 from an element (2) to be applied, including the following
steps: depositing the adhesive layer (5) onto at least a part of
the element (2) to be applied, where appropriate, drying the
adhesive layer (5), at least partially, covering this adhesive
layer (5) with the protective layer (6), in a fluid state, where
appropriate, drying the protective layer (6).
12. Process for applying to the eyelid, the eyelashes and/or the
eyebrows a cosmetic article (1) according to claim 1, including the
following steps: (a) placing at least the protective layer (6) of
the cosmetic article (1) in contact with water, until said
protective layer (6) has at least partially dissolved, (b) applying
the article to the eyelid, the eyelashes and/or the eyebrows by
placing the adhesive layer (5) in contact with the eyelid, the
eyelashes and/or the eyebrows.
13. Article (1) according to claim 6, in which the hydrophilic
polymer is chosen such that its glass transition temperature
T.sub.g is greater than or equal to 60.degree. C.
14. Article (1) according to claim 6, in which the hydrophilic
polymer is chosen such that its glass transition temperature
T.sub.g is greater than or equal to 80.degree. C.
15. Process according to claim 11, wherein the adhesive layer (5)
is totally covered with the protective layer (6).
Description
TECHNICAL FIELD
[0001] The present invention relates to a cosmetic article to be
applied to human keratinous materials, namely the eyelids, the
eyelashes and/or the eyebrows, and also to the production of such
an article and to the application thereof to these
keratinousmaterials. The invention relates, more particularly but
not exclusively, to an article including one or more false
eyelashes to be applied to the eyelashes, the eyebrows and/or the
eyelid, or a shell, a strip or a patch to be applied to the
eyelid.
PRIOR ART
[0002] In general, to apply false eyelashes or eyelash extensions,
the person has, on the one hand, false eyelashes and, on the other
hand, a bottle of special glue, which may be in the same package.
In a first stage, he or she places the glue on the false eyelashes.
Some glues contain solvents with an unpleasant odour: this is the
case, for example, for the glue known under the trade name Ardell
Lashtite Clear Adhesive. Next, he or she waits until this deposit
of glue has at least partially dried. Finally, he or she sticks the
false eyelashes to the root of the eyelashes, or even to the
eyelid. This is the case, for example, for the article and the
process described in U.S. Pat. No. 3,833,007. This application is
intricate or even difficult since the spreading of the glue on the
false eyelashes is not always uniform, which may result in
unsightly surpluses of glue or, on the contrary, absences of glue
which will penalize the hold of the false eyelashes. Furthermore,
this application is long since it requires partial drying of the
glue. Finally, it obliges the use of two articles, namely the glue
and the false eyelashes.
[0003] Presized false eyelashes are also known, in the form of
whole tufts or fringes, which are held on a voluminous plastic
support or a support in silicone film form. Such supports are
difficult to recycle, they are for a single use and/or are
relatively expensive. Furthermore, since the surface of the false
eyelashes is tacky, the false eyelashes have a tendency to catch
the surrounding dust: rigorous conditions of cleanliness and
handling of the false eyelashes are thus necessary for the use of
such presized false eyelashes and for their storage. Such articles
are described in WO 2012/026315 or JP 2008/308806. Self-adhesive
eyeliners, patches or shells which function on the same principle
and have the same drawbacks are also known.
[0004] There is a need for false eyelashes, shells or patches for
the eyelid which are easy to use and to apply, and practical to
store.
PRESENTATION OF THE INVENTION
Cosmetic Article
[0005] The present invention is directed toward meeting this need
and thus concerns, according to a first of its aspects, a cosmetic
article for application to the eyelid, the eyelashes and/or the
eyebrows, including: [0006] at least one element to be applied,
[0007] at least one adhesive layer which is at least partially in
contact with the element to be applied, this adhesive layer
including at least one water-resistant adhesive material, and
[0008] at least one layer for protecting the adhesive layer,
externally covering same and including at least one water-soluble
polymer.
[0009] The protective layer may be at least partially removed by
wetting it, preferably with water or an aqueous solution, which
brings about the at least partial dissolution of the water-soluble
polymer. The protective layer then ceases to externally cover the
adhesive layer at least in places, and said layer can come into
contact with the surface onto which it is desired to bond the
element to be applied.
[0010] The term "water-resistant adhesive material" should be
understood as meaning that the adhesive material can be brought
into contact with water and not dissolve in water to any great
extent during the wetting of the protective layer, or even not
dissolve at all. If the adhesive material becomes dissolved on
contact with water, its dissolution is less rapid than that of the
protective layer, so as to enable the removal of same while at the
same time leaving a sufficient amount of adhesive on the element to
obtain the desired bonding. Preferably, the adhesive material
maintains its cohesion during the wetting of the protective layer,
and conserves its adhesive properties after possible evaporation of
the water present on its surface, used to remove the protective
layer.
[0011] By means of the invention, a cosmetic article presized with
the adhesive layer, but which is not tacky before use by virtue of
the protective layer, is provided. The article according to the
invention does not require a removable non-stick protective film,
such as a silicone foil, to protect the adhesive layer, and is not
sensitive to dust during its handling by virtue of the presence of
the protective layer which is not tacky. The protective layer is
located on the adhesive layer opposite the element to be applied
and it is preferably provided so as not to come in contact
therewith. Thus, according to the invention, a surface, which may
be an interior surface, of the element to be applied is at least
partially coated with the adhesive layer, which is itself coated
with the protective layer.
[0012] The element to be applied may include a false eyelash or a
tuft of false eyelashes, the adhesive layer coated with the
protective layer being located at one end of the false eyelash or
of the tuft of false eyelashes. As a variant, the element to be
applied includes a false eyelash fringe. In the latter case, the
element to be applied preferably includes a connecting strip and
the false eyelashes are then fixed, via one end, to the connecting
strip, said connecting strip being at least partially covered with
the adhesive layer. The false eyelashes may also be connected
together by a knitted or woven connecting strip, the term "strip"
covering one or more yarns for connecting between the eyelashes,
this or these connecting yarns possibly being monolithic with the
eyelashes, where appropriate.
[0013] In other embodiments, the element to be applied is intended
to be deposited on the eyelid. In this case, the element to be
applied may include a shell, a patch or a strip for the eyelid. The
shell preferably has a concave application surface, matching the
curvature of the eyelid. The patch or the strip have dimensions
suitable for attachment to the eyelid or the eyebrows.
[0014] The water-resistant adhesive material is preferably a
water-resistant pressure-sensitive adhesive (PSA) chosen from the
group consisting of acrylic polymers, notably copolymers of
acrylate and methacrylate, pressure-sensitive adhesives based on
rubber or based on styrene copolymers, for instance
styrene-isoprene-styrene (SIS) and styrene-butadiene-styrene (SBS)
copolymers.
[0015] The adhesive layer on the support may be deposited by
coating, spraying or dipping onto the support during manufacture.
Said adhesive layer may also be activated by a source of heat, a
source of light, for instance UV, by depositing a two-component
mixture which crosslinks on the support to form a PSA.
[0016] Said at least one polymer of the protective layer is
preferably a water-soluble hydrophilic polymer. The protective
layer may include a hydrophilic polymer, in dry form. The
protective layer may be in the form of a continuous film. The
protective layer is advantageously different from a layer of
water-soluble powder. In particular, the coating layer
advantageously forms a coating, a uniform covering on the adhesive
layer, notably in contrast with a powder. The protective layer may
thus be non-pulverulent, preferably of substantially constant
thickness, and preferably in the form of a flexible, monolithic,
transparent film of uniform composition, continuously covering the
adhesive layer.
[0017] The water-soluble polymer is preferably chosen such that its
glass transition temperature T.sub.g is greater than or equal to
30.degree. C., better still greater than or equal to 60.degree. C.,
or even greater than or equal to 80.degree. C.
[0018] Said at least one polymer of the protective layer is notably
chosen from the group consisting of polyvinylpyrrolidones (PVP),
also known as polyvidones or povidones, preferably nonionic PVPs,
polysaccharides, notably hydroxyethylcellulose (HEC) or gum arabic,
and polyvinyl alcohols (PVA), notably polyvinyl alcohol.
[0019] The protective layer may also contain plasticizers to give
this protective layer suppleness: mention may be made of glycerol,
glycols, acid esters, notably carboxylic acid esters, citrates,
benzoates and/or isosorbide diesters.
[0020] The protective layer advantageously entirely covers the
adhesive layer before use of the article, uniformly. The protective
adhesive layers are thus superposed.
[0021] The protective layer may have a thickness of between 10
.mu.m and 1000 .mu.m.
[0022] The protective layer may be deposited by coating, spraying
or dipping onto the adhesive layer during manufacture thereof.
Packaging Assembly
[0023] A subject of the invention, according to another of its
aspects, in conjunction with the foregoing, is also a packaging
assembly including at least one cosmetic article, or even a
plurality of cosmetic articles as defined above, and a packaging
for containing same.
[0024] One advantage of the invention is that of being able to
stack the articles in the packaging without the need for an
interleaving support, for example. In other words, the protective
layer of one of the articles may come directly into contact with
another article. The packaging may thus be compact and generate
less waste.
Process for Manufacturing a Cosmetic Article
[0025] According to another of its aspects, a subject of the
invention is also a process for manufacturing a cosmetic article as
defined above, from an element to be applied, including the
following steps: [0026] depositing the adhesive layer onto at least
a part of the element to be applied, [0027] where appropriate,
drying the adhesive layer, [0028] at least partially, preferably
totally, covering this adhesive layer with the protective layer,
preferably in a fluid state, [0029] where appropriate, drying the
protective layer.
[0030] The term "fluid state" means that the protective layer in
this state flows under its own weight, as opposed to a solid
state.
[0031] The process may include the preliminary step of preparing
the element to be applied.
[0032] The protective layer may be at least partially removed by
wetting it, preferably with water, which brings about the at least
partial dissolution of the water-soluble polymer. The protective
layer then ceases to externally cover the adhesive layer at least
in places, and said layer can come into contact with the surface
onto which it is desired to bond the element to be applied.
Process for Applying a Cosmetic Article to the Eyelid, the
Eyelashes and/or the Eyebrows
[0033] According to another of its aspects, a subject of the
invention is also a process for applying a cosmetic article as
defined above to the eyelid, the eyelashes and/or the eyebrows,
including the following steps:
[0034] (a)placing at least the protective layer of the cosmetic
article in contact with water, until said protective layer has at
least partially, or even totally, dissolved,
[0035] (b)applying the article to the eyelid, the eyelashes and/or
the eyebrows by placing the adhesive layer in contact with the
eyelid, the eyelashes and/or the eyebrows.
[0036] When the article is placed in contact with water, the
protective layer disappears sufficiently for the surface to become
adhesive on account of the adhesive material of the adhesive
layer.
[0037] By means of the invention, it is not necessary to place glue
onto the eyelashes or the eyelids or anywhere else, for the
application of the article. It suffices to dip the article or a
part of the article including the protective layer in water, before
application, in order to dissolve the protective layer and thus to
reveal the adhesiveness of the adhesive layer, and then to apply
the article to the intended area. There may be a waiting time after
dipping and before application, for example for draining the
article.
[0038] The duration of step (a) of placing the protective layer in
contact with water, preferably at a temperature of between
10.degree. C. and 40.degree. C., is preferably between 10 seconds
and 2 minutes approximately, preferably between 30 seconds and 1
minute. This is a quite short duration, when compared with the time
to wait for the glue to dry in the devices of the prior art, which
means that the implementation of the application process is
relatively rapid for the user.
Adhesive Layer
[0039] The adhesive layer comprises or is constituted of a
water-resistant adhesive material.
[0040] For the purposes of the present invention, the term
"material" means a polymer or a polymeric system that may comprise
one or more organic polymers of different nature. This adhesive
material may be in the form of a polymer solution or a dispersion
of polymer particles in a solvent. This adhesive material may also
contain a plasticizer, such as those chosen from acid esters,
notably carboxylic acid esters, citrates, benzoates, adipates,
carbonates and/or isosorbide diesters. This adhesive material must
have a certain bonding power defined by its viscoelastic
properties.
[0041] The adhesive materials according to the invention may be
chosen from adhesives of "Pressure Sensitive Adhesive" type, for
instance those cited in the "Handbook of Pressure Sensitive
Adhesive Technology", 3rd edition, D. Satas.
[0042] Pressure-sensitive adhesives (PSA) are systems with physical
curing characterized by permanent adhesiveness. Bonding takes place
by applying pressure to the adhesive layer. The greater the
pressure applied, the better the adhesion. In addition to the
excellent initial adhesion, pressure-sensitive adhesives also offer
good adhesion to surfaces that are difficult to bond. They also
facilitate bonds with good shear strength and peel strength.
[0043] The pressure-sensitive adhesives (PSA) used in the context
of the invention are water-resistant.
[0044] The adhesive nature of an organic polymer is generally
associated with its glass transition temperature. A necessary but
insufficient condition for a polymer to be adhesive is that it must
have a glass transition temperature (T.sub.g) that is significantly
below room temperature, i.e. below a temperature equal to
25.degree. C.
[0045] Pressure-sensitive adhesives (PSA) are characterized by a
glass transition temperature T.sub.g below -20.degree. C.
[0046] The glass transition temperature (T.sub.g) of the polymers
may be measured by differential calorimetric analysis (Differential
Scanning calorimetry, DSC) under the following conditions:
[0047] To measure the glass transition temperature, a film about
150 mm thick of test polymer is prepared by depositing an aqueous
solution or dispersion of the polymer in a circular Teflon die 40
mm in diameter and leaving the deposit to dry. The film is dried in
an oven at a temperature of about 23.degree. C. under a relative
humidity of 45%, until the weight no longer changes. About 5 to 15
mg of the film are taken up and placed in a crucible, which is then
introduced into the analyser. The thermal analyser is a
DSC-2920.RTM. model from the company TA Instruments. The initial
and final temperatures of the temperature sweep are chosen so as to
surround the desired glass transition temperature. The temperature
sweep is performed at a rate of 10.degree. C./minute.
[0048] This analysis is performed according to the standard ASTM D
3418-97 apart from the above changes.
[0049] The pressure-sensitive adhesive materials may be chosen from
acrylic polymers, notably copolymers of acrylate and methacrylate,
pressure-sensitive adhesives based on rubber or based on styrene
copolymers, for example such as styrene-isoprene-styrene (SIS) and
styrene-butadiene-styrene (SBS) copolymers.
[0050] They may also be urethane polymers, polyurethanes,
silicones, such as Bio-PSAs, ethylene/vinyl acetate polymers, block
copolymers based on styrene or natural rubbers, chloroprene,
butadiene, isoprene, neoprene or the like.
[0051] As non-limiting examples of pressure-sensitive adhesives
based on rubbery polymers, mention may notably be made of natural
rubber (poly(cis-1,4-isoprene)), methyl methacrylate-isoprene graft
copolymers, styrene-butadiene copolymers, butyl rubber,
acrylonitrile-butadiene rubber, styrene-isoprene block copolymers,
polybutadiene, ethylene-butylene block copolymers and
polychloroprene.
[0052] Among the pressure-sensitive adhesives comprising polar
acrylic polymers, mention may be made of block or statistical
copolymers based on acrylic acid, alkyl acrylates and alkyl
methacrylates, and also the copolymers of these acrylics with
ethylene and vinyl acetate.
[0053] As other pressure-sensitive adhesives, mention may be made
of copolymers of butyl acrylate, butyl methacrylate and acrylic
acid, these copolymers being available commercially, for example
under the brand name Roderm.RTM. 560 (Rohm and Haas).
[0054] An example of a pressure-sensitive adhesive that may be
suitable for use is poly(2-ethylhexyl acrylate), for example the
product available commercially under the brand name Geltac.RTM.
100G (from the company Advanced Polymer International), as an
aqueous dispersion containing 40% solids of 15 micron adhesive
acrylic microspheres.
[0055] Examples of acrylic copolymers that may be suitable for use
are available commercially under the brand names Acronal.RTM. V210
(BASF), Mowilith.RTM. LDM 7255, Revacryl.RTM. 491 (Clariant) and
Flexbond.RTM. 165 (Air Products).
[0056] Examples of polyurethane-based adhesives that may be
suitable for use are available under the brand names Carbotac.TM.
2897 (Lubrizol) and Vylon UR.RTM. 6100 (Toyobo Vylon).
[0057] In examples, use is made of: [0058] the adhesive Pros-Aide
(acrylic latex) Cream Blend.RTM. 331 Adhesive, [0059] the
commercial glue Duo Verte.RTM., [0060] the latex Acudyne.RTM. 5800P
from Dow Chemical, [0061] the latex Daitosol.RTM. 5500GM from Daito
Kasei Kogyo.
[0062] The PSA-based adhesive layer may be obtained by drying
acrylic polymer latices having very low T.sub.g values, for
instance the acrylic polymers Roderm.RTM. 560, Acudyne.RTM. 5800P
from Dow Chemical or Daitosol.RTM. 5500GM from Daito Kasei Kogyo,
or by evaporation of anhydrous solvent from an isoprene-styrene
block polymer. Mention may also be made of the following commercial
references: Jowatherm.RTM. hot-melt PSA, Jowat-Toptherm.RTM.
hot-melt PSA.
Protective Layer
[0063] The protective layer includes at least one water-soluble
hydrophilic polymer. It is preferably obtained by depositing, as a
superposition, onto the adhesive layer, and by drying an aqueous
solution containing a hydrophilic polymer. The coating layer
advantageously forms a coating, a uniform covering on the adhesive
layer, notably in contrast with a powder.
[0064] Said at least one hydrophilic polymer of the protective
layer may be chosen from the group consisting of
polyvinylpyrrolidones (PVP), also known as polyvidones or
povidones, polysaccharides, and polyvinyl alcohols (PVA), and
preferably PVPs or PVAs.
[0065] The hydrophilic polymer may be chosen from
polyvinylpyrrolidones. The polyvinylpyrrolidones may be chosen from
vinylpyrrolidone homopolymers or copolymers.
[0066] Among the homopolymers, mention may be made of
polyvinylpyrrolidones (PVP) of different molecular weights, the
weight-average molecular mass of said homopolymer being measured by
light scattering. More particularly, the polyvinylpyrrolidones
(PVP) are chosen from polyvinylpyrrolidones with a weight-average
molecular mass ranging from 2000 daltons to 3 000 000 daltons, more
particularly with a weight-average molecular mass ranging from 30
000 daltons to 2 000 000 daltons. Mention may be made in particular
of polyvinylpyrrolidones with a weight-average molecular mass
ranging from 40 000 daltons to 80 000 daltons, and
polyvinylpyrrolidones with a weight-average molecular mass ranging
from 900 000 daltons to 1 500 000 daltons.
[0067] Examples of polyvinylpyrrolidones that may be mentioned
include the products available under the trade names PVP K.RTM. 30
L or PVP K.RTM. 90 from the company ISP.
[0068] According to the invention, the term "vinylpyrrolidone
copolymers" means both polymers resulting from the polymerization
of vinylpyrrolidone with only one type of monomer and those
resulting from the polymerization of vinylpyrrolidone with several
types of monomers, for example with two types of monomers leading
to the production of a terpolymer.
[0069] Examples that may be mentioned include the copolymers
commercially available under the brand name Luviskol.RTM. (PVP and
PVP/VA) from the company BASF and under the names PVP-K.RTM. or
PVP-NA.RTM. from the company ISP.
[0070] An example of a polyvinylpyrrolidone that will preferably be
chosen is a nonionic PVP.
[0071] The hydrophilic polymer may be chosen from polysaccharides.
In general, the compounds of this type that may be used in the
present invention are chosen from those described especially in
Kirk-Othmer's Encyclopedia of Chemical Technology, Third Edition,
1982, volume 3, pages 896-900, and volume 15, pages 439-458, in
Polymers in Nature by E. A. MacGregor and C. T. Greenwood,
published by John Wiley & Sons, Chapter 6, pages 240-328, 1980,
in the book by Robert L. Davidson entitled Handbook of
Water-Soluble Gums and Resins published by McGraw Hill Book Company
(1980) and in Industrial Gums--Polysaccharides and their
Derivatives, edited by Roy L. Whistler, Second Edition, published
by Academic Press Inc.
[0072] These polysaccharides may be chemically modified, notably
with urea or urethane groups or by hydrolysis, oxidation,
esterification, etherification or alkylation reaction, or by
several of these modifications.
[0073] Preferably, these polysaccharides are nonionic.
[0074] The polysaccharides that are suitable for use in the
invention may most particularly be homopolysaccharides such as
fructans, glucans, galactans and mannans or heteropolysaccharides
such as hemicellulose.
[0075] The polysaccharides that are suitable for use in the
invention may also be chosen from higher plant polysaccharides such
as homogeneous polysaccharides, in particular cellulose-based
compounds and derivatives thereof.
[0076] According to the invention, the term "cellulose-based
compound" means any polysaccharide compound bearing in its
structure linear sequences of anhydroglucopyranose (AGU) residues
linked together via .beta.(1,4) glycoside bonds. The repeating unit
is the cellobiose dimer. The AGUs are in chair conformation and
bear 3 hydroxyl functions: 2 secondary alcohols (in position 2 and
3) and a primary alcohol (in position 6). The polymers thus formed
combine together via intermolecular bonds of hydrogen bond type,
thus giving the cellulose a fibrillar structure (about 1500
molecules per fibre).
[0077] The degree of polymerization differs enormously depending on
the origin of the cellulose; its value may range from a few hundred
to several tens of thousands.
[0078] Cellulose has the following chemical structure:
##STR00001##
The hydroxyl groups of cellulose may react partially or totally
with various chemical reagents to give cellulose derivatives having
intrinsic properties. Among these derivatives, cellulose ethers,
cellulose esters and cellulose ester ethers are distinguished.
Thus, the hydrophilic polymer is preferably chosen from cellulose
ethers, cellulose esters and mixtures thereof.
[0079] Preferably, the hydrophilic polymer (6) is a
hydroxyalkylcellulose in particular chosen from
hydroxymethylcelluloses, hydroxyethylcelluloses and
hydroxypropylcelluloses; and/or a hydroxyalkylalkylcellulose mixed
cellulose in particular chosen from hydroxypropylmethylcelluloses,
hydroxyethylmethylcelluloses, hydroxyethylethylcelluloses,
hydroxybutylmethylcelluloses and cetylhydroxyethylcelluloses. Such
compounds are notably commercially available under the names
Klucel.RTM. (hydroxypropylcellulose), Polysurf.RTM. and
Natrosol.RTM. CS (cetylhydroxyethylcellulose) sold by the company
Ashland and also Cellosize.RTM. (hydroxyethylcellulose) sold by the
company Dow Chemicals.
[0080] The hydrophilic polymer may be chosen from polyvinyl
alcohols (PVA), and in particular polyvinyl alcohol will be
chosen.
[0081] The polyvinyl alcohols (PVA) are notably chosen from PVAs
with a weight-average molecular mass ranging from 10 000 daltons to
200 000 daltons, more particularly with a weight-average molecular
mass ranging from 100 000 daltons to 200 000 daltons.
[0082] The polyvinyl alcohols according to the invention may be
polymers with different degrees of hydrolysis and/or different
viscosities. Use may be made in particular of polyvinyl alcohol
with a degree of hydrolysis ranging from 74% to 99%.
[0083] As polyvinyl alcohol, an example that may be mentioned is
the product available under the trade name Celvol 205 PV
Alcohol.RTM. from the company Sekisui Speciality Chemicals.
BRIEF DESCRIPTION OF THE DRAWINGS
[0084] The invention may be better understood from reading the
following detailed description of non-limiting illustrative
embodiments thereof and from examining the appended drawing, in
which:
[0085] FIG. 1 schematically represents in side view an example of a
cosmetic article in accordance with one embodiment of the
invention,
[0086] FIG. 2 is an enlarged view of detail II of FIG. 1,
[0087] FIG. 3 represents in block form an example of a process for
producing the article of FIG. 1,
[0088] FIG. 4 represents in block form an example of a process for
applying the article of FIG. 1,
[0089] FIG. 5 schematically represents the article of FIG. 1 after
performing a step of the process of FIG. 4,
[0090] FIG. 6 schematically represents the application of the
article of FIG. 1 after performing another step of the process of
FIG. 4,
[0091] FIG. 7 schematically represents an overview example
according to the invention including a plurality of articles such
as the article of FIG. 1,
[0092] FIG. 8 schematically represents in side view another example
of a cosmetic article according to the invention,
[0093] FIG. 9 schematically represents in top view another example
of a cosmetic article according to the invention,
[0094] FIG. 10 schematically represents in side view the article of
FIG. 9,
[0095] FIG. 11 schematically represents in front view another
example of a cosmetic article according to the invention,
[0096] FIG. 12 schematically represents in side view the article of
FIG. 11, and
[0097] FIG. 13 schematically represents in front view another
example of a cosmetic article according to the invention applied to
the eyelid.
DETAILED DESCRIPTION
[0098] FIG. 1 illustrates an example of a cosmetic article 1
according to the invention. The article 1 includes an element 2 to
be applied comprising in this example a plurality of false
eyelashes 3 grouped together in a tuft. At one end 4 of the false
eyelashes 3, the article 1 includes an adhesive layer 5 including a
water-insoluble adhesive material consisting in this example of a
pressure-sensitive adhesive, for example an acrylic polymer known
under the trade name Roderm.RTM. 560. The adhesive layer 5 is
entirely covered with a protective layer 6, as may be seen in
greater detail in FIG. 2. The protective layer 6 includes a
water-insoluble hydrophilic polymer, for example a polysaccharide
such as gum arabic.
[0099] The adhesive layer 5 can enable the false eyelashes 3 to be
held at the end 4 to form the tuft. As a variant, an additional
attachment or adhesive enables the false eyelashes 3 to be knotted
or bonded to the end 4 so as to form the tuft of false eyelashes 3,
independently of the adhesive layer 5.
[0100] FIG. 3 illustrates the process for manufacturing the
cosmetic article 1 of FIG. 1. This process includes a step 10
consisting in depositing the adhesive layer 5 onto at least a part
of the element 2 to be applied. The next step 11 consists in drying
the adhesive layer 5, for example for a few minutes. Next, in step
12, the adhesive layer 5 is at least partially covered, preferably
entirely covered as in the illustrated example, with the protective
layer 6 which is then in a fluid state. Finally, in step 13, the
protective layer 6 is dried.
[0101] The cosmetic article 1 ready to be used is then obtained.
FIG. 4 illustrates the steps of the process for applying the
cosmetic article 1 according to the invention. The process includes
a first step 14 consisting in placing at least the protective layer
6 of the cosmetic article 1 in contact with water, until this
protective layer 6 has at least partially dissolved. The cosmetic
article free of the protective layer 6, the latter having been
dissolved, is then obtained, as illustrated in FIG. 5. The adhesive
layer 5 is then exposed and fully adhesive. This enables, in a step
15, illustrated in FIG. 4, the article 1 to be applied to the
eyelid, the eyelashes and/or the eyebrows by placing the adhesive
layer 5 in contact with the eyelid, the eyelashes and/or the
eyebrows. As illustrated in FIG. 6, it is a matter in this case of
bringing the tuft of false eyelashes 3 up to the eyelid P to make
the adhesive layer 5 adhere thereon and/or to the eyelashes C of
this person.
[0102] FIG. 7 represents an example of an assembly 20 for packaging
cosmetic articles 1. This packaging assembly 20 includes a package
21, which is preferably leak tight, notably towards moisture, and a
plurality of articles 1 identical to the one which is illustrated
in FIG. 1.
[0103] FIG. 8 represents another example of a cosmetic article 1
according to the invention, including in this example an element 2
to be applied formed by a single false eyelash 3, at one end of
which has been deposited the adhesive layer 5 coated with the
protective layer 6.
[0104] FIGS. 9 and 10 illustrate another cosmetic article 1
according to the invention. This article 1 includes an element 2 to
be applied which is also intended to be deposited on the eyelashes,
the eyebrows and/or the eyelid, the element 2 to be applied
including a plurality of false eyelashes 3 arranged in fringe form
and a connecting strip 25. The false eyelashes 3 of the fringe are
connected, at one end, to the connecting strip 25 forming an arc to
match the shape of the root of a person's eyelashes. As may be seen
in FIG. 10, the connecting strip 25 is coated on one face 26 with
the adhesive layer 5, which is covered with the protective layer
6.
[0105] FIGS. 11 and 12 represent another cosmetic article 1
including an element 2 to be applied consisting of a strip to be
applied, for example to a person's eyelid, in this case in the
manner of an eyeliner. As may be seen in FIG. 12, this article 1
also includes, under the element 2 to be applied, the adhesive
layer 5 covered with the protective layer 6.
[0106] The article 1 has a three-dimensional shape, as may be seen
notably in the example of FIGS. 11 and 12. The invention is
particularly advantageous for a complex 3D shape, since it is
difficult by hand to deposit glue onto a three-dimensional
object.
[0107] In the example illustrated in FIG. 13, the element 2 to be
applied of the cosmetic article 1 consists of a patch and it is
intended to cover, as illustrated, a part of a person's eyelid P,
by matching the shape thereof.
EXAMPLES
Example 1: Individual False Eyelashes
[0108] With individual false eyelashes or false eyelash tufts sold
under the brand name Peggy Sage X60, two application methods are
tested: a method according to the invention and a comparative
method outside the invention.
Comparative Example Outside the Invention
[0109] An individual false eyelash or false eyelash tuft is taken
up using tweezers. A small amount of Acudyne.RTM. 5800P from Dow
Chemical is applied thereon. A short waiting time is observed to
allow this glue to dry, and this individual false eyelash is then
deposited on the eyelash fringe. This operation is repeated about
12 times to have a full, uniform fringe on one eye. This type of
makeup process is relatively long and requires the use of a bottle
of glue and individual false eyelashes.
Example According to the Invention
[0110] A box of individual false eyelashes is provided, the tip at
the base of which has been coated with a first adhesive layer of
Acudyne.RTM. 5800P latex from Dow Chemical. This layer is allowed
to dry for 5 minutes and it is then covered with a 10% PVP solution
(80% water, 10% ethanol, 10% PVP K30L). This solution makes the
tacky side of the adhesive layer disappear. Several individual
false eyelashes are prepared in the same manner. The consumer takes
up a first false eyelash, which she soaks in water for 30 seconds
to 1 minute: the tip of the false eyelash becomes tacky. He or she
can then apply this false eyelash. This saves time, it is easier
and more practical: no need for two products.
Example 2: False Eyelash Fringes
[0111] With false eyelash fringes sold under the brand name Ardell,
two application methods are tested: a method according to the
invention and a comparative method outside the invention.
Comparative Example Outside the Invention
[0112] The consumer must have available false eyelashes and a glue,
for example the glue Duo Verte.RTM.. He or she applies the glue to
the base of the false eyelash fringe and then waits about 5 minutes
before depositing the false eyelash fringe at the base of the
eyelashes. Applying the glue is intricate, partly because of the
very narrow area of the base of the false eyelash and partly due to
the fact that the glue applicator is difficult to handle.
Example According to the Invention
[0113] The false eyelash fringe is prepared beforehand according to
the process of the invention. The base of the false eyelash fringe
is coated with an adhesive layer of Acudyne.RTM. 5800P latex from
Dow Chemical. The latex is left to dry for 10 minutes: the surface
of the adhesive layer becomes transparent and very tacky. This glue
is then covered with an aqueous solution (90% water, 10% ethanol,
10% PVP K30L) to form the protective layer. Once dry, the
protective layer formed by this solution is no longer tacky. The
consumer takes up the false eyelash fringe prepared according to
the invention. He or she rinses it with cold water, in water, or
soaks it in an aqueous solution for 30 seconds to 1 minute. The
surface of the adhesive layer then becomes tacky. He or she removes
the false eyelash fringe from the water to apply it to her eyelid
at the base of the eyelashes. The application according to the
invention is much easier and no longer requires the use of a glue
product.
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