JP4535263B2 - Cosmetic container - Google Patents

Description

  The present invention relates to a powder cosmetic container such as a foundation, blusher, and eye shadow.

  Cosmetics called compacts such as foundations, blushers, eye shadows, etc. are each made by filling powder cosmetics in a cake and placing them in an outer container, and are often used portablely. Therefore, there is a problem that the cake-like cosmetic inside is cracked or cracked due to vibrations and shocks when carrying the cosmetics, impacts when accidentally dropped.

  Therefore, a cushion part made of a spring piece is provided inside the outer container (Patent Document 1), a flat elastic plate on which a dish is placed (Patent Document 2), or a cushioning sheet such as urethane foam is pasted. It has been proposed to wear (Patent Document 3).

Japanese Utility Model Publication No. 61-25685 Japanese Utility Model Publication No. 7-20108 Japanese Utility Model Publication No. 61-31690

  However, it is difficult for conventional methods to prevent the cosmetic material from cracking or cracking even when subjected to a strong impact such as a drop collision.

  To protect the internal cosmetics against strong impact, attach an elastic body to the outside of the exterior container to reduce the impact, or to reduce the amount of deformation of the dish when subjected to impact. Although methods for adjusting the size, thickness, etc. of the plate are conceivable, these methods are impractical because the design of the outer container is impaired.

  On the other hand, the present invention is formed into a cake when cosmetics such as foundations, blushers, eye shadows are subjected to a strong impact such as a drop collision or other severe impacts in daily use. It is an object of the present invention to provide a cosmetic container capable of suppressing the occurrence of cracks and cracks in the powder cosmetic.

  The present inventor provides a cushioning material having a loss tangent tan δ, which is a ratio of a loss elastic modulus and a storage elastic modulus, in a specific range between a dish filled with a powder cosmetic and an outer container. It has been found that the transmission of impact to the dish is greatly reduced and the above-mentioned purpose can be achieved.

  That is, the present invention is provided with a powder cosmetic filling dish, an outer container for storing the powder cosmetic filling dish, a lid for covering the opening of the outer container, and the powder cosmetic filling dish and the outer container. A cosmetic container comprising a cushioning material, the loss tangent tanδ (25 ° C.) of the cushioning material represented by the following formula (1):

(Where G ″ is the loss elastic modulus of the cushioning material and G ′ is the storage elastic modulus of the cushioning material)
Is 0.2 to 1 at 10 Hz, and the shear direction spring constant α (25 ° C.) expressed by the following equation (2)

(In the formula, G ′ is the storage elastic modulus (MPa) of the cushioning material to be used, S is the area of the cushioning material to be used (mm ² ), t is the thickness (mm) of the cushioning material, and M is the dish. Total mass of powder cosmetic (g))
Provides a cosmetic container having a viscosity of 0.03 to 0.6 MPa · mm / g.

  When a cosmetic product called compact is dropped and collided, the cake-like powder cosmetic filled in the dish inside the outer container breaks because the impact applied to the outer container is transmitted to the dish, This is because distortion occurs in the cake-like powder cosmetic due to the deformation. According to the present invention, the loss tangent tan δ, which is the ratio of the loss elastic modulus and the storage elastic modulus, is brought into contact with the plate and the outer container. A buffer material having a (25 ° C.) of 0.2 to 1 at 10 Hz is provided. The loss tangent tan δ of this cushioning material is extremely higher than conventional vibration-proof materials such as natural rubber, butyl rubber, and silicone rubber, and it is difficult to transmit an impact. Therefore, according to the cosmetic container of the present invention, it is possible to effectively suppress the occurrence of cracks and cracks in the internal cosmetic even against a strong impact such as a drop collision.

  Moreover, the shear direction spring constant α (25 ° C.) of the buffer system provided with this buffer material is 0.03 to 0.6 MPa · mm / g. Therefore, according to the cosmetic container of the present invention, it is possible to prevent the shock absorber from being deformed excessively inside the cosmetic container and colliding between the dish and the outer container when receiving an impact.

  Hereinafter, the present invention will be specifically described with reference to the drawings. In each figure, the same numerals indicate the same or equivalent components.

  1A is a top view of the cosmetic container 1A according to one embodiment of the present invention in a state where the lid is opened, FIG. 1B is a sectional view thereof, and FIG. 1C is a sectional view of the state where the lid is closed.

  This cosmetic container 1A includes a powder cosmetic filling dish 3 in which powder cosmetic 2 is formed and filled in a cake shape, an outer container 4 for storing the powder cosmetic filling dish 3, and an opening of the outer container 4 It consists of a lid 5 covering the part. Here, the lid 5 is connected to the outer container 4 by a hinge 6 and can be freely opened and closed. In addition, there is no restriction | limiting in particular in the powder cosmetics 2 itself with which this cosmetics container 1A is filled, It can be set as foundation, blusher, eye shadow, etc. The dish 3 can be formed by punching a metal plate, resin injection molding, or the like, and the outer container 4 or the lid 5 can be formed by resin injection molding or the like.

  In this cosmetic container 1A, a sheet-like cushioning material 7 is adhered between the bottom surface of the powder cosmetic filling tray 3 and the inner bottom surface of the exterior container 4, and the cushioning material 7 is expressed by the following formula (1 ) Loss tangent tanδ (25 ° C)

(Where G ″ is the loss elastic modulus of the cushioning material and G ′ is the storage elastic modulus)
Is a shear constant spring constant α (25 ° C.) per total mass of the plate 3 and the powder cosmetic 2 represented by the following formula (2).

(In the formula, G ′ is the storage elastic modulus (MPa) of the buffer material to be used, S is the area of the buffer material to be used (mm ² ), t is the thickness (mm) of the buffer material, and M is the dish) And powder cosmetic total mass (g))
Is 0.03 to 0.6 MPa · mm / g.

  The loss tangent tan δ is a scale representing the degree to which the impact energy is lost as heat generation. As the buffer material 7, a material having a loss tangent tan δ (25 ° C.) of 0.2 Hz to 1 at 10 Hz is used. It is possible to sufficiently reduce the transmission rate of the impact to the plate 3 and prevent the cosmetic from being cracked or cracked due to a drop impact in daily use. On the other hand, if the loss tangent tan δ is smaller than 0.2, the energy for releasing the impact is small, and if it is larger than 1, the fluidity becomes large and difficult to handle.

  Since the peak frequency when a drop impact is applied to a plastic cosmetic container is about 1 kHz, it is desirable to evaluate the loss tangent tan δ of the buffer material at a frequency of 1 kHz. The error is large and the measurement becomes difficult. On the other hand, when the loss tangent is evaluated at 10 Hz, the measurement error can be suppressed, and the obtained numerical value is easy to break due to external impact of the cake-like powder cosmetic contained in the cosmetic container and good Show correlation.

  In the present invention, the value of the loss tangent tan δ is calculated by forming a sample as a buffer material into a disk shape having a diameter of 12 mm and a thickness of 1 mm, and sandwiching it between parallel plates having a diameter of 12 mm. Rheometer (manufactured by PHYSICA Messtechnik GmbH), the loss elastic modulus (G ″) and storage elastic modulus (G ′) of the torsional shear while applying to (frequency within the range of linear strain (0.01%) 0.01-100Hz) MCR300) and plot the loss tangent (tanδ = G ″ / G ′), which is the ratio of the loss elastic modulus (G ″) and storage elastic modulus (G ′) of the cushioning material, against the frequency It was obtained by doing.

  Specific examples of materials having a loss tangent tan δ (25 ° C.) of 0.2 to 1 at 10 Hz include ultra-soft polyurethane rubber, specifically Sorbothane, Inc. (USA) Sorbo S (30), Sorbo M (50), solvo H (70), and the like. In general, silicone rubber widely used as a buffer material has a tan δ of less than 0.2 and does not satisfy the loss tangent tan δ required by the present invention. FIG. 7 shows the relationship between the loss tangent tan δ and the frequency curve.

  Adhesion of the cushioning material 7 to the powder cosmetic filling plate 3 and the outer container 4 is carried out by using an adhesive such as cyanoacrylate, specifically Aron Alpha (manufactured by Toagosei Co., Ltd.), Cemedine 3000 (produced by Cemedine), etc. It is preferable to use.

  In the cosmetic container 1A of FIG. 1, the powder cosmetic filling dish 3 is supported on the outer container 4 only by the buffer material 7 stuck between the bottom surface and the inner bottom surface of the outer container 4. A gap 8 is provided between the body cosmetic filling tray 3 and the outer container 4 on the entire side surface. The width L1 of the gap 8 is preferably 0.1 to 5 mm from the viewpoint of deformation of the buffer material at the time of impact and portability of the cosmetic container. Thus, by providing the gap 8 and setting the above-described spring constant α to 0.03 to 0.6 MPa · mm / g, when the cosmetic container 1A is subjected to a drop impact in daily use, it is buffered inside the container. It is prevented that the material 7 deform | transforms excessively and the tray 3 and the exterior container 4 collide. On the other hand, when the spring constant α is smaller than 0.03 MPa · mm / g, the cake-like powder cosmetic 2 is damaged due to the collision between the plate and the container, and when the spring constant α is larger than 0.6 MPa · mm / g. The cushioning effect is small, and the cake-like powder cosmetic 2 is easily damaged.

  In the present invention, in order to set the spring constant α of the buffer system through the buffer material to 0.03 to 0.6 MPa · mm / g, the total mass (M) of the plate 3 and the powder cosmetic 2 and the buffer material to be used 7 and the thickness (t) of the buffer material 7 are appropriately adjusted. When a plurality of cushioning material pieces are attached as the cushioning material 7, they are preferably arranged symmetrically on the bottom surface of the dish 3 around the center of gravity of the dish 3. For example, when using four cushioning material pieces, it is preferable to arrange them at the four corners of the bottom surface of the dish 3 as shown in FIG. 1A. In addition, as the arrangement of the cushioning material 7, as in the cosmetic container 1B shown in FIG. 2, the cushioning material 7 may be distributed in the central portion and the periphery of the bottom surface of the plate 3, as in the cosmetic container 1C shown in FIG. Alternatively, only the central portion may be used.

  Here, the sticking part area refers to the total area of the contact part area between the powder cosmetic filling tray 3 and the buffer material 7. When the contact area of the powder cosmetic filling tray 3 and the buffer material 7 and the contact area of the outer container 4 and the buffer material 7 are different, the average area thereof is used.

As an example of a preferable combination of the size of the plate 3, the powder cosmetic 2, and the cushioning material 7 for setting the spring constant α in the above range, for example, the weight (M of the plate 3 and the powder cosmetic 2) (M ) Is 1 to 30 g, and an ultra-soft polyurethane rubber having a storage elastic modulus (G ′) of 0.05 to 0.2 MPa (Sorbocein Co., Sorbo Sheet S, H or M) is used as the buffer material 7, and its sticking area ( S) is 15 to 200 mm ² , and thickness (t) is 0.1 to 5 mm.

  In addition, the cosmetic container of the present invention can take various forms. For example, in the cosmetic container 1 </ b> A described above, the buffer material 7 may be provided between the side surface of the powder cosmetic filling tray 3 and the inner side surface of the outer container 4.

  4A to 4C show a cosmetic container 1D according to a further different embodiment. In this cosmetic container 1D, the powder cosmetic filling dish 3 is detachably fitted into the inner container 9, and the buffer material 7 is adhered between the bottom surface of the inner container 9 and the inner bottom surface of the outer container 4. Yes. By storing the powder cosmetic filling dish 3 in the outer container 4 through the internal container 9 in this way, the powder cosmetic filling dish 3 can be easily refilled when the powder cosmetic 2 is consumed. It becomes possible.

  In this cosmetic container 1D, in order to prevent the powder cosmetic filling dish 3 from being detached from the inner container 9 during use, the powder cosmetic filling dish 3 and the inner container 9 may be adhered with an adhesive. In addition, a simple latching mechanism may be provided for them.

  The cosmetic container 1E of FIGS. 5A and 5B includes a cushioning material 7 in which the powder cosmetic filling dish 3 is adhered to the inner bottom surface of the outer container 4, the side surface of the powder cosmetic filling dish 3, and the outer container 4 It is supported in the outer container 4 by a claw 10 that latches the inner side surface of the outer container 4.

  The claw 10 is made of a resin molded integrally with the exterior container 4, and can be attached to and detached from and fixed to the latching recess 11 provided on the powder cosmetic filling tray 3 using the elasticity of the resin. It is what I did. In a state where the nail 10 is fitted in the latching recess 11 of the powder cosmetic filling plate 3, it is preferable to secure play 12 in the latching recess 11. The size L2 of the play 12 is preferably about the same as or smaller than the size L1 (FIG. 5A) of the gap 8 between the powder cosmetic filling plate 3 and the outer container 4.

  By providing the nail 10 as described above, it is possible to suppress the impact applied to the exterior container 4 from being transmitted to the powder cosmetic filling tray 3 via the nail 10. Further, not only the cushioning material 7 but also the nail 10 can support the powder cosmetic filling dish 3 on the outer container 4, so that it is not necessary to bond the powder cosmetic filling dish 3 to the cushioning material 7, At the time of refilling, etc., it is only necessary to place the powder cosmetic filling tray 3 on the cushioning material 7, and it is possible to obtain the advantage that the powder cosmetic filling tray 3 can be easily detached.

  The cosmetic container 1 </ b> F of FIGS. 6A to 6C is obtained by providing a thin ring-shaped gap material 13 on the outer periphery of the side surface of the powder cosmetic filling tray 3. The gap member 13 is attached to the inner bottom surface of the outer container 4 with a spring member 14 and is biased in the lid direction. On the other hand, the lid 5 is provided with a projection 15 for pushing the gap material 13 when the lid 5 is closed. According to the cosmetic container 1F, when the lid 5 is opened, the gap material 13 is positioned between the side surface of the powder cosmetic filling tray 3 and the inner side surface of the outer container 4, so that the powder cosmetic 2 is used. Occasionally, the powder cosmetic filling dish 3 can be prevented from shifting when the powder cosmetic filling dish 3 is rubbed with a sponge or the like, and the feeling of use of the cosmetic container 1F can be improved. Further, when the lid 5 is closed, the gap material 13 is pushed in by the protrusion 15 and is located between the buffer material 7 adhered to the bottom surface of the powder cosmetic filling tray 3 and the inner side surface of the outer container 4. The impact received by the outer container 4 due to dropping or the like is prevented from being transmitted to the powder cosmetic filling tray 3 through the gap material 13.

  Hereinafter, the present invention will be specifically described based on examples.

Examples 1-6, Comparative Examples 1-4
A cosmetic container 1A shown in FIGS. 1A to 1C and a cosmetic container 1E shown in FIGS. 5A and 5B are prepared, and a powder foundation having the composition shown in Table 1 is applied to a powder cosmetic filling dish 3 having a mass of 10 g and a bottom area of 2000 mm ^2. 8 g cake was filled. In this case, a disc-shaped cushioning material having the material and size shown in Table 2 was attached to each cosmetic container at a total of five points in the center and four corners.

  The obtained cosmetic containers were each allowed to fall freely from a height of 500 mm and collide with the plywood, and the number of times until the powder foundation was broken (number of cracks) was measured. Table 2 shows the results of average values measured for 10 samples. The greater the “number of cracks”, the greater the impact resistance of the cosmetic.

(* 1) Area ratio = area where buffer material is applied / bottom area of powder cosmetic filling tray
(* 2) 25 ° C, 10Hz
(* 3) Sorbothane, Solvo S
(* 4) Solvothein, Solvo H
(* 5) Irumagawa Rubber, IS825

  From the results of Table 2, the loss tangent tan δ is smaller than 0.2 and the comparative examples 1 and 3 where the spring constant is larger than 0.6, the cosmetic containers of the examples all have a large number of cracks, It turns out that it is excellent in impact resistance.

  Further, among the examples, the cosmetic container 1A of FIGS. 1A to 1C in which the gap 8 is provided between the powder cosmetic filling dish 3 and the outer container 4 around the entire side surface thereof is the powder cosmetic filling dish 3. It can be seen that the impact resistance is superior to the cosmetic container 1E of FIGS. 5A and 5B in which the side surface of the outer container 4 and the inner side surface of the exterior container 4 are hooked by the claws 10.

  The cosmetic container of the present invention is useful as a cosmetic container called compact such as a foundation, blusher, and eye shadow.

It is a top view in the state where the lid of the cosmetic container is opened. It is sectional drawing of the cosmetics container of FIG. 1A. It is sectional drawing of the state which closed the cover of the cosmetics container of FIG. 1A. It is a top view in the state where the lid of the cosmetic container is opened. It is a top view in the state where the lid of the cosmetic container is opened. It is a top view in the state where the lid of the cosmetic container is opened. It is sectional drawing of the cosmetics container of FIG. 4A. It is sectional drawing of the state which closed the lid | cover of the cosmetics container of FIG. 4A. It is a top view in the state where the lid of the cosmetic container is opened. It is sectional drawing of the state which closed the lid | cover of the cosmetics container of FIG. 5A. It is a top view in the state where the lid of the cosmetic container is opened. It is sectional drawing of the cosmetics container of FIG. 6A. It is sectional drawing of the state which closed the cover of the cosmetics container of FIG. 6A. It is a loss tangent vs. frequency curve.

Explanation of symbols

1A, 1B, 1C, 1D, 1E, 1F Cosmetic container 2 Powder cosmetic 3 Powder cosmetic filling dish or dish 4 Exterior container 5 Lid 6 Hinge 7 Buffer material 8 Gap 9 Internal container 10 Nail 11 For latching Recess 12 Play 13 Gap 14 Spring 15 Protrusion

Claims (7)

A powder cosmetic filling dish, an outer container for storing the powder cosmetic filling dish, a lid for covering the opening of the outer container, and a cushioning material provided between the powder cosmetic filling dish and the outer container A loss tangent tanδ (25 ° C.) of the cushioning material represented by the following formula (1)

(Where G ″ is the loss elastic modulus of the cushioning material and G ′ is the storage elastic modulus of the cushioning material)
Is 0.2 to 1 at 10 Hz, and the shear direction spring constant α (25 ° C.) expressed by the following equation (2)

(In the formula, G ′ is the storage elastic modulus (MPa) of the buffer material to be used, S is the area of the buffer material to be used (mm ² ), t is the thickness (mm) of the buffer material, and M is the dish) And powder cosmetic total mass (g))
Is a cosmetic container having a viscosity of 0.03 to 0.6 MPa · mm / g.   The cosmetic container according to claim 1, wherein a cushioning material is adhered between the bottom surface of the powder cosmetic filling tray and the inner bottom surface of the outer container.   The cosmetic container according to claim 1, wherein a powder cosmetic filling tray is further fitted in the inner container, and a buffer material is adhered between the bottom surface of the inner container and the inner bottom surface of the outer container.   Powder makeup with a cushioning material stuck between the bottom of the powder cosmetic filling dish and the inner bottom of the outer container, and a nail that holds the side of the powder cosmetic filling dish and the inner side of the outer container The cosmetic container according to claim 1 or 2, wherein the cosmetic filling dish is supported by the outer container.   A gap material is provided on the outer periphery of the side surface of the powder cosmetic filling dish, and the gap material is located between the side surface of the powder cosmetic filling dish and the inner side surface of the outer container when the lid is opened, and when the lid is closed. 3. A spring material attached to the inner bottom surface of the outer container so as to be positioned between the buffer material adhered to the bottom surface of the powder cosmetic filling tray and the inner side surface of the outer container. Cosmetic container.   The cosmetic container according to any one of claims 1 to 5, wherein the cushioning material is an ultra-soft polyurethane rubber. The weight of the dish and powder cosmetics is 1-30g, and the area where the cushioning material is applied is 15-200mm ² The cosmetic container according to claim 6, wherein the cushioning material has a thickness of 0.1 to 5 mm.

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