Patent Application
20140216490
The present invention is directed to an applicator for topically applying a composition to a face.
Typical applicators for topically applying facial skin care compositions (e.g., foundations) to skin and facial hair that are made of expanded foam do not provide a smooth and continuous deposition of the composition on a face for the purposes of concealing facial skin imperfections and fine facial hair (e.g., vellus hair). These existing applicators typically have a rough, and often porous and absorbent surface, which do not allow for an even and smooth deposition. There is a need to maximize the effectiveness of these skin compositions (e.g., concealing benefits) with even and smooth facial deposition.
Another shortcoming of these applicators is they do not offer the ability to manage a reservoir of skin care composition between the applicator surface and facial substrate and yet provide the desired even and smooth deposition. There is also a need for an applicator to be made from a material that resists absorption of the skin care composition during contact.
There is yet a further need for the applicator to be adaptable for use to the diverse contours of a human face (e.g., broad areas as cheeks as well as challenging areas around the nose and eyes) and also intuitive to the user in how to hold and use the applicator. There is a need for the applicator to be sanitary, i.e. allow the applicator to be washed after one or more uses. There is also a need for applicator to be able to hold a reservoir of dispensed skin care compositions in the dosing area and keep it from running before being applied to the face.
The present invention is directed to solving one or more of these problems. Without wishing to be bound by theory, the present invention identifies the materials, geometry, and methodology to address one or more of the problems.
Firstly, the inventive applicator helps to addresses the need of managing and concealing fine facial hair of a human female. Depending on the individual and exactly where on the face this hair is located, the hair may be vellus hair with shaft diameters ranging from 1 to 30 micro meters to darker terminal hair with shaft diameters typically larger than 30 micrometer to about 120 micrometers. Without wishing to be bound by theory, concealing this hair is best achieved by using the applicator of the present invention to smoothly and evenly applying a skin care composition to skin and hair, and concurrently laying down (i.e., flatten) the hair against the skin. Furthermore, results are maximized by stroking the applicator along the grain of the hair. Results may also be maximized by including chemistry in the skin care composition to further minimize the appearance the fine facial hair through opacity and maintaining the adhesion of hair to the skin.
Accordingly, one aspect of the invention provides an applicator, configured for topically applying a composition to a face, which comprises a first surface and an opposing second surface, wherein the second surface is a concave surface and the second surface comprises a non-absorbing elastomeric material.
A second aspect provides for a method of provide hair minimization to a face comprising the step of topically applying a film-forming composition to the face by the aforementioned applicator. A third aspect of the invention provides for a kit comprising the aforementioned applicator; and a container containing a skin care composition; and optionally use instructions. Manufacturing methods are also provided.
a is a user topically using the applicator of
b is the user grabbing the applicator in a first position before using the applicator as shown in
a is a user topically using the applicator of
b is the user grabbing the applicator in a second position before using the applicator as shown in
a is a user topically using the applicator of
b is the user grabbing the applicator in a third position before using the applicator as show in
a is a user topically using the applicator of
b is showing the user grabbing the applicator in a fourth position before using the applicator as shown in
One aspect of the invention provides for an applicator wherein a surface of the applicator comprises of a non-absorbing elastomeric material, preferably wherein a first surface and an opposing second surface each comprise a non-absorbing elastomeric material. In one embodiment, the surface of the applicator configured to make contact with a facial substrate at least comprises the non-absorbing elastomeric material, wherein preferably the surface is also a concave surface. Without wishing to be bound by theory, absorbing materials, such as sponges, exhibit many undesirable characteristics for hair lay-down applications. Based on unpublished consumer research, some consumers feel that a portion of the skin care composition is being lost by being absorbed into the sponge and therefore not being completely dosed on to the skin. Another challenge with absorbing materials is their use may lead to unsanitary conditions since sponges and other such materials are challenging to clean or wash and can harbor bacteria. Also, absorbing materials do not provide even applications of skin care composition on to the facial substrate given the rough or non-smooth topical surface that absorptive materials typically have.
In one embodiment, at least 10%, or 15%, 25%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95%, or 98%, or more of an outer surface area of the applicator comprises a non-absorbing elastomeric surface. In another embodiment, less than 100%, or 98%, 95%, 90%, 80%, 70%, 60%, 50%, 40%, 30%, 25%, or 15%, or less; but greater than 10%, of the outer surface area of the applicator comprises a non-absorbing elastomeric material. In yet another embodiment, 40% to 100%, preferably from 50% to 100%, alternatively from 60% to 100%, alternatively combinations thereof, of the outer surface area of the application comprises the non-absorbing elastomeric material.
In one embodiment, from 5% to 100%, preferably from 10% to 100%, more preferably from 50% to 100%, alternatively from 25% to 75%, alternatively from 10% to 90%, alternatively from 80% to 100%, alternatively combinations thereof, by weight of the applicator comprises a non-absorbing elastomeric material. In yet another embodiment, the applicator comprises 2, 3, 4, 5, or more different types of materials. The different types of materials may or may not all be non-absorbing elastomeric materials.
Another aspect of the invention provides for at least a surface of the applicator configured to make contact with the skin or facial substrate to be comprised of a non-absorbing elastomeric material that is smooth for even application of skin care compositions to the facial substrate. Yet another aspect of the invention provides for the material of the applicator, at least the outer surface, to be washable to allow the user to clean the applicator between one or more uses.
In one embodiment, the non-absorbing elastomeric material of the applicator is a combination of a hydrogenated styrene butadiene block copolymer and a silicone fluid, preferably wherein the silicone fluid is a dimethyl silicone fluid. The copolymer compound may be obtained from Kuraray Plastics Co., Ltd (Osaka, Japan); SEPTON COMPOUND JS20N. The dimethyl silicone fluid may be obtained from Momentive Performance Materials Japan LLC (Tokyo, Japan); TSF451 Series of products. In another embodiment, the applicator comprises from at least 95%, preferably at least 96%, or 97%, 98%, or at least 99% of the block copolymer by weight of the applicator. Alternatively the applicator comprises from 90% to 100%, alternatively from 99% to 99.9%, alternatively combinations thereof, of the block copolymer by weight of the applicator. In another embodiment, the applicator material further comprises a silicone fluid, preferably from 0.01% to 2%, more preferable from 0.1% to 1.5%, alternatively from 0.5% to 1.2%, alternatively from 0.5% to 1%, alternatively combinations thereof, of the silicone fluid by weight of the applicator. In one non-limiting example, the material of the applicator comprises 99.3% of the block copolymer and 0.7% of the silicone fluid, by weight of the applicator.
The material(s) comprising the applicator can be injected molded or caste molded to form the applicator. Alternatively these materials may be vulcanized, thermoformed, assembled and heat welded or welded with adhesives, injection molded, extruded, die cut, cast, or combinations thereof.
Non-limiting examples applicator materials that could be used on a surface of the applicator, or even throughout the applicator as a whole, include a polymer containing a heteroatom. Examples may include polyvinylchloride, polyurethanes, polyamides, polyesters, polyacrylates, and polycarbonates. These materials may be used with a plasticizer. In addition, a plurality of these materials may be formed as separate elements and then combined into a single unit (to ultimately make an applicator of the present invention). In one non-limiting example, a variety of materials may be die-cut from sheet stock and then assembled with heat, or adhesives to form a single composite applicator that yields the desired properties of inter alia surface profile, hardness, and flexibility.
In one embodiment, the applicator is made of several different types of materials. The applicator may be formed of a laminate of materials. In such an embodiment, one or more outer surfaces of the applicator may have a non-absorbing elastomeric material, whereas materials in the interior of the applicator may include other materials that may include absorbing or non-absorbing materials; or elastomeric or non-elastomeric materials; or combinations thereof. Such embodiments could provide the advantages of the present invention and yet allow for greater design and manufacturing flexibility. These laminates may be made through heat welding, adhesives, or multi sequential step casting or injection molding processes.
Other non-limiting examples of nonabsorbent materials that could be used throughout the applicator as a whole, in combination, and/or on a surface of the applicator include thermoplastic elastomers, urethanes, and rubber.
One aspect of the invention provides the applicator to have an overall surface area from 25 cm2 to 200 cm2, preferably from 30 cm2 to 100 cm2, preferably from 35 cm2 to 80 cm2, alternatively from 40 cm2 to 60 cm2. In one embodiment, one surface of the applicator, preferably the surface configured to make contact with the skin or facial substrate, is concave. In such an embodiment, the concave surface preferably has a surface area from 5 cm2 to 100 cm2, preferably from 7 cm2 to 50 cm2, more preferably from 10 cm2 to 30 cm2. During use, not the entire one surface of the applicator (configured to make contact with the skin/facial substrate) will typically make contact with the skin or facial substrate. The percentage of the one surface of the applicator making contact with the skin/facial substrate will depend upon a number of variables including the user's preferences, contour of the face being treated, and amount of composition being applied (at any given time).
In one embodiment when one surface of the applicator is concave, the concave surface is configured to contain a volume from 0.030 ml to 0.500 ml, alternatively from 0.100 ml to 0.220 ml, alternatively from 0.140 ml to 0.200 ml, alternatively combinations thereof.
One suitable way to measure this volume is to place the concave surface of the applicator up and determine how much water the concave surface is capable of retaining. In addition, this volume may be customized to show the user how much product to dispense during one application cycle. By making visually or tactile evidence of steel mold markings or printed or decorated areas on the surface or changes in geometry or material thickness changes, the applicator design or a portion of the design is used to indicate to the user exactly how much skin care composition to dispense.
The size of the applicator can be important. Without wishing to be bound by theory, the applicator strikes a balance: in being small enough to provide a relatively compact design (for travel etc.) and suitable for use by the typical sized human female fingers (e.g., about 1 cm in diameter); but large enough to facilitate easy application for larger skin substrate areas (e.g., cheeks), and maintain a user gripable surface away from the skin/facial contact surface (avoiding unwanted contact and composition loss).
Turning to
The width of the applicator (1) is measured perpendicular to its length along the same horizontal plane (35). The thickest portion of the applicator (1), per the applicator (1) described by the figures herein, is at the center vertical axis (37). In one embodiment, the length of the applicator is from 45 mm to 70 mm, preferably from 50 mm to 65 mm, alternatively from 55 mm to 60 mm, alternatively combinations thereof. The width of the applicator is from 30 mm to 60 mm, preferably from 35 mm to 55 mm, alternatively from 40 mm to 50 mm, alternatively combinations thereof. A thickness of the applicator is from 0.5 mm to 5 mm, alternatively from 1 mm to 4 mm. In one embodiment, the thickness, measured at the center vertical axis (37), is from 1 mm to 4 mm, alternatively from 2 mm to 3.5 mm, alternatively from 3 mm to 4 mm, alternatively combination thereof. In another embodiment, the thickest portion of the application is from 1 mm to 4 mm, alternatively from 2 mm to 3.5 mm, alternatively from 3 mm to 4 mm, alternatively combination thereof. In one embodiment, the thickness of the applicator does not exceed 6 mm, preferably does not exceed 5 mm, alternatively does not exceed 4 mm.
In an alternative embodiment, the applicator (1) has an overall oval shape (as the curvilinear shape) defined by the circumferential edge (9). Alternatively the inter-zone border (13) forms an oval shape. Alternatively the inner zone (3) has an ovoidal portion protruding from the first surface (31)
Preferably the outer zone (6) generally has uniform thickness throughout the outer zone from 0.5 mm to 3 mm, preferably 1 mm to 2.5 mm, more preferably from 1 mm to 2 mm. In yet an ever further preferred embodiments, the inner zone (3) has a thickness from 1.5 mm to 5 mm, preferably from 2.5 mm to 4.5 mm, more preferably from 3 mm to 4 mm.
The first surface (31) of the applicator (1) opposes the second surface (32). The second surface (32) is concave whereas the first surface is generally convex. It is the second surface that is configured to primarily make contact with the facial substrate. Referencing
R5 (25) is along the plane of the major axis and R6 (26) is along the plane of the minor axis. Accordingly R5 (25) is longer than R6 (26). In one embodiment, R5 (25) is from 19 mm to 39 mm, preferably from 24 mm to 34 mm, alternatively from 26 mm to 32 mm, alternatively 25 to 30 mm, alternatively from 28 mm to 33 mm, alternatively combinations thereof. In another embodiment R6 (26) is from 12 mm to 32 mm, preferably from 17 mm to 27 mm, alternatively from 19 mm to 25 mm, alternatively from 20 mm to 24 mm, alternatively combinations thereof. In yet another embodiment, the second surface (32) of the applicator is free or substantially free of any protrusions or texturing. In a non-limiting example, the R5 (25) and R6 (26) are 28.25 mm and 22 mm, respectively.
The mass of the applicator is from 1.0 g to 500 g.
Without wishing to be bound by theory, there are potential benefits of having the inner zone (3) thicker than the outer zone (6). The larger thickness may provide for improved mold processing. Furthermore, the ellipsoidal shaped protrusion (or any other shaped protrusion) of inner zone (3) from the first surface (31) of the applicator (1), may help novice users under the proper orientation of their fingers for use and perhaps avoiding having their fingers slip during use. The protrusion may help in the rigidity of the applicator at its center to help evenly distribute downward forces to the circumferential edge (9). The size of the protrusion may help visualize for the user how much of the skin care composition should be dosed. Lastly, processing may be improved with the protrusion by making applicator easier to separate should any co-adhesion happen during bulk packing.
Another aspect of the invention provides for the applicator to have the right balance in bending force. There needs to be enough bending force as to provide hair lay-down benefits but not too much so as to provide insufficient flexibility to accommodate the complex contours of the human face. Tables 1a and 1b summarizes dimensions of ten applicators (and standard deviation). Tables 2a and 2b summarize results from bending force testing from the applicators described in Tables 1 and 1b.
1i.e., the longest dimension.
2Thickness of the outer zone (6), wherein the thickness of the outer zone (6) is substantially uniform throughout the outer zone (6)
3“Height” is the distance measured along the center vertical axis (35) from the horizontal plane (35) to the first surface (31) of the applicator (1). In other words, it is the maximum gap distance plus the thickness of the inner zone (3) along the center vertical axis (37). It should be appreciated, given the properties of the material, the mass of the applicator, and concave surface of the applicator facing down, and overall geometry of the application, are variables that may impact the “height” dimension herein.
4Radii R1, R2, R3, R4, R5, and R6 are as previously defined above.
Each of the ten applicators, with dimensions specified in the Tables 1a and 1b above, are assessed for bending force at various locations at the applicator. The average force values (Newton) and standard deviations are summarized in Table 2a and Table 2b below. An INSTRON branded model is a suitable instrument for assessing bending force. The instrument has a stainless steel probe with a circular and flat (1 cm diameter) contact zone, and is affixed to the load cell of the instrument. The probe depresses in a down direction (i.e., orthogonally down to a level bench top). The bending force is assessed at the circumferential edge (9), at the respective major and minor axis of the elliptical shaped applicator (1), and at the respective first surface (31) and the second surface (32). The contact zone of the probe is brought to bear on the circumferential edge (9) so that the center of the probe is in contact with the outermost edge of the circumferential edge (9) (at the respective surfaces (31, 32)). The applicator (1) is affixed in a C-clamp for the force measurement, wherein the C-clamp clamps the applicator at the geometric center of the applicator on the first surface (31) and the second surface (32). The C-clamp has a contact surface areas of 0.25 cm2 for each clamp on the respective surfaces (31,32). The contact areas of each clamp are circular and flat.
Force measurements are taken at the major axis and minor axis of the applicator (1). In one set of measurements, the second surface (32) is face down, i.e., concave surface facing down, with the contact zone of the probe brought to bear on the first surface (31) at the major and minor axis. In another set measurements, the second surface (32) facing up, i.e., concave surface facing up, with the contact zone of the probe brought to bear on the second surface (32) of the applicator (1) at the major and minor axis. The percent difference in bending force of the respective surfaces (31, 32), at the respective axis, is compared. Table 2a is directed to the minor axis and Table 2b is directed to the major axis.
1Probe contacting the first surface (31) of the applicator.
2Probe contacting the second surface (32) of the applicator (i.e., concave surface against probe).
For the Minor Axis, the preferred range of downward resistance force against the skin at the outward edges of the applicator used to doctor the material inward and through the trailing edge of the applicator and distributed onto the skin should broadly range from 0.01804 Newton force to 0.20224 Newton force. The more preferred range of forces resistance for the sides, or minor axis, should be between the range of 0.04874 to 0.17154 Newton force. The most preferred lateral downward resistance should be between 0.07944 and 0.14084 Newton forces.
3Probe contacting the first surface (31) of the applicator.
4Probe contacting the second surface (32) of the applicator (i.e., concave surface against probe).
As contrasting to the previous Minor Axis ranges the Major Axis downward resistance on the skin needed to doctor a sufficient film of material through the trailing edge of the applicator is preferred to be from 0.03157 to 0.15463 Newton force. The more preferred range of resistance pressure is 0.05208 to 0.13412 Newton force. The most preferred range of resistance is 0.06153 to 0.11361 Newton force.
As illustrated by the Tables 2a and 2b, the bending force against the second surface (32) is greater than the bending force against the first surface (31). Without wishing to be bound by theory, the complex curvature in the Z axis (i.e., “cup shape”) of the applicator forms an internal force distribution within the applicator. The shape, coupled with the use of the elastomeric materials described herein, enables even and smooth deposition of skin care compositions to the facial substrate. This internal force distribution enables the appropriate amount of downward pressure at the contact points of the applicator against the facial substrate for composition application, but also provides the appropriate amount of pressure to maintain a reservoir of the composition that precedes the contacting edge to offer an even flow of composition to the contacting edge (and thus facial substrate) during use. Furthermore, this bias of the bending force between the surfaces (31, 32) also enables less of the user's finger pressure during application and thus a more even distribution of downwards pressure against the facial substrate. This allows for a wider range of user back finger pressure variations and yet still achieving the desired even and smooth composition deposition.
One aspect of the invention provides for an applicator (1) wherein the first surface (31) has a first bending force measured at the circumferential edge (9), and the second surface (32) has a second bending force measured at the circumferential edge (9), wherein the second bending force is at least 1.1 times, preferably from 1.1 to 10, more preferably from 1.5 to 5, alternatively 2 to 5, alternatively combinations thereof, times greater than the first bending force.
One aspect of the invention provides an applicator that has a smooth surface, preferably the surface that is configured to make contact with the target skin substrate. Such a smooth surface provides more effective application of skin care composition, particularly for providing hair lay-down benefits. One way of measuring the smooth surface of the applicator is by way of surface friction. One suitable way of analyzing friction is by using a “KES-SE” Friction Tester, manufactured by Kato Tech Co., Ltd., Kyoto, Japan. A non-limiting applicator of the present invention measures a coefficient of friction or “COF” of 0.65 (a control “roughness plate” measuring at 0.43 (typically measuring between 0.36 to 0.45). In one embodiment, the COF of a virgin applicator is from 0.5 to 0.9, alternatively from 0.55 to 0.75.
Surface energy is another way of characterizing a smooth surface. One suitable way of measuring “Owens-Wendt Surface Energy” is using FTA1000 Drop Shape Instrumentation, manufactured by First Ten Angstroms, Inc., Portsmouth, Va., U.S.A. The Owens-Wendt Surface Energy is determined by adding: (i) the surface energy due to dispersive interactions (so called “dispersive component”); (ii) and the surface energy due to polar interactions (so called “polar component”). A glass microscope slide and a plastic microscope cover slip are used as controls. The results are summarized in the table below.
In one embodiment, an exterior surface of the applicator (1) (preferably the second surface (32)), comprises a surface energy from 17 dynes/cm to 37 dynes/cm, preferably from 32 dynes/cm to 42 dynes/cm, alternatively combinations thereof.
The hardness value of a non-limiting example of an applicator is assessed at 39.8 on Durometer Scale A. In one embodiment, the applicator comprises a Hardness value measured on Durometer Scale A from 30 to 60, preferably from 35 to 50. The softness/pliability of the material should allow more force at the trailing edge. Applicator durometers were measured with a Shore Scale A (Asker Durometer model XP-A) durometer tester.
The skin care composition suitable for topical application to skin by the applicator may be essentially any dermatologically safe composition. In a preferred embodiment, the composition contains one or more ingredients to soften hair (e.g., glycerol) to work in combination with the applicator to minimize the appearance of hair, preferably facial hair, preferably fine facial hair on a human female. In another preferred embodiment, the composition contains one or more ingredients to cover the fine facial hair such as foundation. More preferably, the skin care composition comprises both hair softening ingredients as well as hair or skin covering agents (e.g., pigments). While pigments may be used, an alternative preferred composition is essentially free of pigments. In other embodiments, the pigment level may be normal or a reduced level of pigment may be used. Other ingredients may also be included in the composition such as a sunscreen agent or skin whitening agent. Preferably the skin care composition: will not clog skin pores; is suitable for sensitive skin, and is dermatologically tested. In a preferred embodiment, the skin care composition is a film forming composition to provide, in part, hair lay-down benefits. Film-forming compositions (e.g., MQ resins) are known in the art. See e.g., WO 97/17057; WO 98/52515.
In another embodiment, the skin care composition generally has a higher viscosity. Without wishing to be bound by a theory, a more viscous composition can provide better coverage or application to a face since it will not run as compared to less viscous compositions, thereby allowing more time for the composition to be applied by the user via the applicator and more time for the composition to be absorbed by the facial skin and fine facial hair. The applicator of the present invention is particularly suitable for applying such higher viscosity composition. All stated viscosities in the present application are Brookfield viscosities, unless otherwise specified. Suitable Brookfield viscosity ranges for the skin care composition may include those from 100 centipoise (cps) to 200,000 cps, preferably from 15,000 cps to 90,000 cps, more preferably from 15,000 cps to 60,000 cps, alternatively for an applicator with 39.8 Shore A hardness the preferable ranges are from 15,000 cps to 40,000 cps, and alternatively combinations thereof. One suitable way of measuring viscosity includes using a Brookfield RVT, Spindle C, in Heliopath mode, at 5 rotations per minute (RPM) spindle speed (and under ambient conditions). Without wishing to be bound by theory, the second surface (32) of the applicator (1) having a concave surface may help to retain the skin care composition while the user dispenses the composition onto the second surface. The concave second surface of the applicator acts as a reservoir during the use of the applicator so the skin care composition is applied more from the center of the applicator. This is in sharp contrast to some other applicators that act as a rectilinear squeegee moving the skin care composition to the either side of the applicator. This can lead to having more strokes of applicator by the user for application (increasing the time of application); and undesirably forcing the skin care composition to move in a direction inconsistent to the grain of the fine facial hair, thereby potentially leading to suboptimal hair lay-down results.
The viscosity of the skin care composition may have a significant impact on the effective coverage of the product on skin using the applicator of the present invention. Low viscosity compositions used with a high Shore A applicator may not dispense well from the applicator because the fluid may not develop sufficient fluid dynamic resistance to overcome the downward force of the applicator's trailing edge. Alternatively, high viscosity compositions, when used in combination with a low Shore A applicator, may result in uneven deposition due to the high level of fluid dynamic resistance and relatively low trailing edge force.
In one embodiment, the skin care compositions that are used in combination with the applicator of the present invention have a viscosity which correlates to the hardness of the applicator. For an applicator with a Shore A hardness of about 39 to 45, the skin care composition will have a viscosity of about 15,000 cps to 40,000 cps. Alternatively, for an applicator with a Shore A hardness of about 55 to 60, the skin care composition will have a viscosity of about 68,000 cps to 90,000 cps. Alternatively, for an applicator with a Shore A hardness of about 47, the skin care composition will have a viscosity of about 100 cps to 90,000 cps, more preferably, between about 15,000 cps to 90,000 cps.
The shear thinning behavior of the skin care formulation is also important for even deposition due to the fact application shear rates are >100 s−1. When used, the applicator is in motion, exerting a shear stress on the fluid. As a result, a velocity gradient is exerted and high shear rates are created due to the small gap thickness. A typical shear rate for “spreading” or “rubbing” is >100 s−1 and as a result, a shear thinning product will exert less resistance to spreading. Viscosities were defined as a Brookfield Viscosity which is a common industrial method to quantify the structure of the fluid. Additionally, steady state flow curves using a TA instrument AR-G2 rheometer was created by exerting the fluid to increasing shear stresses and measuring the resulting viscosity. As is common to those known in the field, the data was then fit to the constitutive Carreau Model to fit the data to a common shear rate (in this case 10 and 100 s−1).
In addition, the Durometer measured hardness of the applicator material having the same geometry can be varied through composition to create a more ideal hardness of applicator for a particular product fluid viscosity. Specifically, with the oval geometry described herein, the applicator Durometer hardness may be ranged from Shore A 20 to Shore A 80, more preferably Shore A 30 to Shore A 65 and specifically Shore A 39 to Shore A 59. By comparing material deposited with a plurality of applicator hardness's, all with the same geometry, it is possible to determine the ideal range of applicator hardness's for specific ranges of product viscosities. In particular, a Shore A hardness of 39.8 has best product deposition performance for viscosities ranging from 100 cps to 19,900 cps. Similarly, an applicator with Shore A hardness of 47 created the most preferable deposition pattern with product viscosities between 20K cps and 69.9K cps. Moreover, an applicator with a Shore A hardness of 59 delivers a more preferred deposition pattern with viscosities from 70K to 200K cps.
Cosmetic compositions were prepared by conventional methods from the following components.
As for Examples 1-3 and Comparison Example 1, in a suitable vessel, all hydrophilic and water soluble components except a thickener (SEPIGEL 305 *26) were blended together, and mixed until all of the components were dissolved. In another vessel, all hydrophobic and oil soluble components except a thickener (RHEOPEARL KL2 *9) were blended, and mixed until all of the components were homogenized. Mix above hydrophilic and hydrophobic ingredients for emulsification. A thickener was added to the obtained emulsion, and the emulsion was gently mixed. When RHEOPEARL KL2 is a thickener, the emulsion was heated until 90 C, then it was cooled down.
As for Example 4, in a suitable vessel, all hydrophilic and water soluble components except a thickener (SEPIGEL 305 *26 and MAKIMOUSSE 12 *27) were blended together, and mixed until all of the components were dissolved. Thickeners were added the mixture and the mixture was gently mixed.
The following Commercial Formulations were also used in testing:
The following applicators were also used in testing:
Non-limiting examples of skin care compositions that may be used in combination with the applicator of the present invention include: US 2005/0255059 A1, paragraph 202, examples 12 and 13; WO 97/17057; and US 2005/0238679 A1. One non-limiting example of a composition comprises: 0.3-10 wt % (preferably 3-6 wt %) of a silicone resin (e.g., MQ resins (trimethylsiloxysilicate) and MQ resins blends from Dow Corning); 5-15 wt % (preferably 8-12 wt %) of glycerin; 2-10 wt % (preferably 4 to 8 wt %) of TiO2 (e.g., TiO2 coated talc or silicone treated TiO2); and 30% to 70% water. Film forming skin compositions are well known in the beauty care arts.
The following examples further describe and demonstrate embodiments of compositions that are useful in combination with the present invention. The examples are given solely for the purpose of illustration and are not to be construed as limitations of the present invention, as many variations thereof are possible without departing from the spirit and scope of the invention.
21 arm hairs with various lengths are implanted in artificial skin such as Bio Skin (model No. H064-001) from Beaulax Co., Ltd. (Japan) Hair length is in the range of 0.5-1.8 cm after implanted in the artificial skin. Excess hairs at the backside of the artificial skin are cut and glue such as cyanoacrylate type instant glue is applied to the backside to adhere hairs on the artificial skin. 0.0125 g (0.0005 g/cm2) of a test sample is applied on the Bio Skin by a finger with finger sack until the sample is evenly distributed. 5 min later, each hair is rated based on a grading sheet of
The arms of human subjects were treated with product using a rubber finger sack and evaluated using the following procedure:
1. Set a rectangle area of 3.8 cm×10 cm on one forearm.
2. Wipe the area with sheet make-up remover, wash with warm water and wipe with paper towel.
3. Measure test product (0.03 ml) via syringe and apply on the forearm using index finger with rubber finger sack.
4. Spread the product evenly within the area and spread it to the one direction for 10 times.
5. Take photos using VISTA from a) the side and b) the top.
Select examples were tested according to Hair Lay-Down Measurement #1, and provided the following average hair lay down rate.
Products were tested according to Hair Lay-Down Measurement #2.
Results of the analysis using Hair Lay-Down Measurement #2:
The following examples further describe and demonstrate embodiments of compositions that are useful in combination with the present invention. The examples are given solely for the purpose of illustration and are not to be construed as limitations of the present invention, as many variations thereof are possible without departing from the spirit and scope of the invention.
Applied 0.15 gram of each formulation on 3 different durometer silicone applicators and then the applied product to a Lenetta Card (5.5×10″) Form 2A B#4201 Opacity charts at two different speed 6″/sec and 1″/sec. All tests were conducted with at least 4 replicates per test.
A visual grading scale, as shown in
The L* axis represents Lightness. This is vertical; from 0, which has no lightness (i.e. absolute black), at the bottom; through 50 in the middle, to 100 which is maximum lightness (i.e. absolute white) at the top.
The c* axis represents Chroma or ‘saturation’. This ranges from 0 at the centre of the circle, which is completely unsaturated (i.e. a neutral grey, black or white) to 100 or more at the edge of the circle for very high Chroma (saturation) or ‘colour purity’.
The h* axis represents Hue. If we take a horizontal slice through the centre, cutting the ‘sphere’ (‘apple’) in half, we see a coloured circle. Around the edge of the circle we see every possible saturated colour, or Hue. This circular axis is known as h° for Hue. The units are in the form of degrees° (or angles), ranging from 0° (red) through 90° (yellow), 180° (green), 270° (blue) and back to 0°.
An advantage of the present invention is the flexibility in how the applicator may be used to apply a skin care composition to a face. Based on Applicant's unpublished consumer research, many women are unsatisfied with prior art applicators (for various reasons) and will even resort to simply using their finger(s). Indeed the human face has a complicated geometry. Areas around the nose need a relatively small applicator whereas a cheek is a relatively large area that lends itself to applicators that cover broader areas. Having an applicator that also is efficient, i.e., minimizes application time, is also desired by many women. Therefore, there is a need to provide an applicator, that not only that provides hair lay-down benefits, but also is adaptable to the complex geometry of the human face.
Turning to
The index finger is typically not completely along the length of the applicator (i.e., along the major axis) as to allow some portion of the second surface (32) of the applicator (1) to make contact with the target skin area. This way, a portion of the applicator can bend and conform around relatively confining areas of face (e.g., nose intersecting the cheek). Although not shown in
a and 9b are directed to an alternative method.
a and 10b are directed to a method that is likely best used for broader areas of the face such as cheeks (47).
a and 11b are directed to a method that is likely best for broader areas of the face such as cheeks.
A user can interchange between any one of these methods during a single facial application event.
On aspect of the invention provides for a method of hair minimization or hair lay-down benefits to a face, preferably a human female face, comprising the step of topically applying a composition, preferably film-forming composition, to the face by an applicator of the present invention. In one embodiment, the method further comprises the step of assessing a directional axis of facial hair growth; and where the step of topically applying the composition with the applicator is conducted along the assessed directional axis of the facial hair growth. Without wishing to be bound by theory, the hair minimization or hair lay-down benefit is optimized by such an approach.
A non-limiting example of a kit containing an applicator and facial skin care composition is provided as
Instructions may be provided in the kit or with the applicator. Instructions instruct the user how to use the applicator and optionally the skin care composition (preferably consistent with the methods described herein). Further, the user may be instructed to apply the skin care composition with the applicator along a directional axis of facial hair growth.
In one embodiment, the user is instructed to dose from 0.05 ml to 0.25 ml of the skin care composition, alternatively from 0.1 ml to 0.2 ml, alternatively from 0.05 ml to 2 ml, alternatively combinations thereof. In another embodiment, the user is instructed to dose from 0.05 g to 0.25 g of the skin care composition, alternatively from 0.1 g to 0.2 g. The container containing the skin care composition may contain from 10 ml to 100 ml, alternatively from 20 ml to 50 ml, alternatively from 15 ml to 35 ml.
For optimal for skin lay-down benefits, it is best to apply the skin care composition with the applicator along the direction of the any hair growth (i.e., hair growth grain). A non-limiting example of use instructions include: “To Use: Check the direction of any facial hair growth. Use the applicator to apply the foundation where you normally would, but ensure you apply in the same direction as the facial hair growth and fully cover facial hair for best hair lay down.” P&G Copyright 2012.
Directions may also include those described in the U.S. Patent Application Publication claiming benefit to U.S. Provisional Application Ser. No. 61/652,976, filed May 30, 2012, entitled “Cosmetic Products for Reducing Hair Appearance,” to Tanaka et al. (attorney docket no. P&G AA834P).
The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numerical values recited. Instead, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as “40 mm” is intended to mean “about 40 mm.”
Every document cited herein, including any cross referenced or related patent or application, is hereby incorporated herein by reference in its entirety unless expressly excluded or otherwise limited. The citation of any document is not an admission that it is prior art with respect to any invention disclosed or claimed herein or that it alone, or in any combination with any other reference or references, teaches, suggests or discloses any such invention. Further, to the extent that any meaning or definition of a term in this document conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this document shall govern.
While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
| Number | Date | Country | |
|---|---|---|---|
| 61761728 | Feb 2013 | US |
