JP6792282B2 - Cosmetic container with inner lid, inner lid and method of manufacturing inner lid - Google Patents

Description

The present invention relates to a cosmetic container suitable for accommodating cosmetics having fluidity and viscosity, and a method for producing an inner lid and an inner lid thereof.

Some cosmetics have various physical properties from solid to liquid, and various types of cosmetic containers for storing these cosmetics have been developed according to the physical properties of the cosmetics.

Liquid cosmetics with extremely high fluidity are stored in a bottle container, and creamy cosmetics with relatively low viscosity with fluidity are stored in a tube container, which are highly viscous and solid or powder without fluidity. Cosmetics are generally stored in compact containers.

Recently, fluid low-viscosity cosmetics have been widely used, but many of them are stored in tube containers because of their fluidity. However, since a mirror is required to use the facial cosmetics stored in the tube container, there is a problem that the usability is worse than the solid cosmetics stored in the compact container.
Powder or paste-like cosmetics that are not fluid even in a compact container are stored in the container body, a mesh lid is installed on it, and a puff is pressed from above the mesh to use these cosmetics. The configuration is described in the following literature.

Japanese Unexamined Patent Publication No. 2008-194190 Jikkenhei 7-435575

However, since the aperture ratio of the mesh in the mesh lid is as large as about 40% to 60%, when a low-viscosity and fluid cosmetic is held with the lid of the compact container turned upside down, the mesh penetrates the mesh lid. It cannot be used to store these cosmetics because it leaks out of the lid.

Therefore, in the present invention, it is assumed that a low-viscosity and fluid cosmetic that is conventionally stored in a tube container is stored in a container body with an open upper surface, and the container body is held upside down for a long time. Provided is a cosmetic container in which the cosmetic does not leak from the inside of the container body, and the cosmetic can be easily taken out by adhering the cosmetic to a puff or the like when necessary, and a method for manufacturing the inner lid and the inner lid. The purpose is.

Therefore, in the present invention, as a low-viscosity and fluid cosmetic, a cosmetic having a viscosity in the range of 2,000 cp to 60,000 cp is targeted, and a preferable viscosity range of the cosmetic is 2,000 cp to 30,000 cp. is there. The cosmetic container according to the present invention comprises a container body for accommodating low-viscosity and fluid cosmetics as described above, and an inner lid having a frame body attached to the opening of the container body. A fiber sheet made of elastic fibers is stretched on the body, and the fiber sheet has an area of 1 with respect to the initial state in which tension is not applied to the elastic fibers. It is stretched on the frame in a stationary state that is isotropically stretched so as to be 0.05 times.
Visible light transmittance of the fiber sheet, the quiescent der 1.8% or less in the state Rutotomoni, in the extended state of the fiber sheet was isotropically stretched 1.05 times the area of the stationary state It will be 2.0% or more.

Preferably, as the fiber sheet, a fiber sheet made by braiding elastic fibers is used.

Further, preferably, the fiber sheet is a braided sheet made of warp knitting, the main fiber of the braided sheet is polyester or nylon, and polyurethane is braided as an auxiliary fiber, so that the mixing ratio of the main fibers is set. Is preferably 85% or more in the case of polyester and 87% or more in the case of nylon.

According to the cosmetic container of the present invention, low-viscosity and fluid cosmetics can be stored without leaking, and when used, the cosmetics stored under the puff or the like are pressed against the fiber sheet from above. It can be easily taken out by attaching it to a puff or the like.

It is an exploded perspective view of the cosmetic container which concerns on embodiment of this invention. (A) is a perspective view of a partially assembled cosmetic container according to the above embodiment, (B) is a perspective view of a fully assembled state, and (C) is a vertical sectional view of (B). .. It is a figure which shows the measuring method of the visible light transmittance of the fiber sheet which comprises the said Example. (A) is a vertical cross-sectional view showing a state in which the fiber sheet is attached to the lower surface of the frame, and (B) is a state in which tension is applied in a direction orthogonal to the surface direction at the central portion of the fiber sheet. It is sectional drawing which shows. It is a figure which shows the structure of the mold for injection molding an inner lid.

As shown in FIG. 1, the cosmetic container 1 according to the embodiment of the present invention is mounted inside the container body 4 having an open top surface, an outer lid 2 for sealing the opening of the container body 4, and the container body 4. It is provided with an inner lid 3. The container body 4 is composed of a lower bowl-shaped portion 41 serving as a storage portion for cosmetics and a cylindrical neck portion 42 continuous above the bowl-shaped portion 41, and a male screw 43 is formed on the outer circumference of the neck portion 42. The inner peripheral surface 44 thereof is formed in a cylindrical shape. A female screw to be screwed into the male screw 43 of the container body is formed on the inner peripheral surface of the outer lid 2 (see FIG. 2C), and a mirror 20 is adhered to the inner bottom surface of the outer lid 2. The inner lid 3 has a flat cylindrical frame 31 (diameter φ1) whose outer peripheral surface 32 is in close contact with the inner peripheral surface 44 of the container body 4, and a fiber sheet 10 is stretched at the lower end 35 thereof. Further, a collar portion 33 is formed at the upper end of the frame body 31 so as to project outward, and as shown in FIG. 2C, when the inner lid 3 is mounted inside the container body 4, the collar portion 33 of the inner lid 3 is formed. The lower surface is in contact with the upper end surface of the container body 4, whereby the inner lid 3 is prevented from falling into the container body 4. Then, when the inner lid 3 is attached to the container body 4 and the container body 4 is sealed with the outer lid 2, the cosmetic container 1 having the appearance as shown in FIG. 2B is obtained.

As shown in FIG. 2C, the upper end of the peripheral edge of the fiber sheet 10 is adhered to the lower end 35 of the frame 31. The lower surface of the fiber sheet 10 is separated upward from the inner bottom surface 45 of the container body 4, and the space D1 from the inner bottom surface 45 of the container body 4 to the lower surface of the fiber sheet 10 is a substantial storage space for cosmetics 5. Become. The initially filled cosmetic 5 is filled in the container body 4 so that an appropriate amount that does not contact the lower surface of the fiber sheet 10, that is, a slight space is formed between the cosmetic 5 and the fiber sheet 10. In the embodiment shown in FIG. 2C, the depth (longitudinal width) of the frame 31 of the inner lid 3 is formed to be slightly larger than half the depth of the container body, and the fibers inside the inner lid 3 are formed. The upper part of the seat 10 is a space in which a puff (not shown) is accommodated.

The fiber sheet 10 constituting the inner lid 3 is preferably formed by finely braiding fibers having elasticity of 500 denier or less by knitting, and the openings formed by the braid can be visually observed. It is so fine that it cannot be measured, and the degree of aperture can be measured by the transmittance of visible light, which will be described later. The fiber sheet made of the braided body having the elasticity is preferably formed by a tricot exhibiting excellent elasticity, polyester or nylon is used as the main fiber, and polyurethane is used as the auxiliary fiber.
In the present invention, a low-viscosity and fluid cosmetic is stored in the container body 4 and the upper end thereof is closed with an inner lid, so that the stored cosmetic is held upside down for a long time. However, it is necessary to prevent the cosmetic from penetrating the finely braided fiber sheet 10. Further, when the cosmetic container is held in the normal use state as shown in the figure and the central portion of the fiber sheet is pressed downward by a predetermined amount toward the inner bottom surface of the container body for storing the cosmetic with a puff or the like. It is necessary that the openings between the elastic fibers constituting the fiber sheet are widened, and the cosmetics inside are exuded above the fiber sheet and adhere to the puff so that they can be easily taken out.

Therefore, in the present invention, by utilizing the fact that the openings between the fibers of the fiber sheet as described above change due to the expansion and contraction of the fiber sheet, the appropriate degree of opening between the fibers of the fiber sheet and the amount of the change are transmitted by visible light. It was measured and specified by the rate.

FIG. 3 is a diagram for explaining a method of measuring the visible light transmittance, and as a procedure thereof, first, an elastic fiber sheet 111 is stretched on the measurement frame 110 shown in FIG. 3B corresponding to the frame 31 of the inner lid 3. Set up. As shown in FIG. 3A, the measuring device 100 is composed of a light source unit 101 and a measuring unit 102, and a fiber sheet 111 stretched on the measuring frame 110 is arranged between the light source unit 101 and the measuring unit 102. The light from the light source unit enters the light receiving element built in the measuring unit 102 via the fiber sheet 111. In the measuring unit 102, visible light is transmitted due to the difference between the light intensity of the direct light from the light source measured in advance and the light intensity when the light from the light source is received through the fiber sheet 111 without the fiber sheet 111. The rate is calculated and the calculation result is displayed and output. A commercially available visible light transmittance / reflectance meter (manufactured by Suga Test Instruments Co. Ltd., HA-TR, hereinafter also referred to as a measuring device) was used to measure the visible light transmittance. ..

The edge of the measuring frame 110 is wide, and its inner diameter φ2 is 7 cm. The fiber sheet 111 to be measured is cut into a circle slightly larger than the inner diameter of the frame, and this cut state is referred to as an "initial state" of the fiber sheet 111. Next, the fiber sheet in this initial state is adhered in a slightly stretched state so that the peripheral edge of the lower surface of the frame 110 is not loosened. This bonded state is a state in which the fiber sheet in the initial state is stretched 1.05 times in area ratio, and this stretched state is referred to as a "rest state" of the fiber sheet 111.

FIG. 4A shows a fiber sheet 10 stationaryly adhered to the lower surface of a frame 31 having a diameter of φ1 in a cosmetic container. FIG. 4B is a diagram showing the fiber sheet 10 in a state where the fiber sheet 10 is pressed downward toward the container body side containing the cosmetics. Figure 4 As shown (A), the in the fiber sheet 10 is resting state a circle having a diameter of φ ₁ (= 7cm), the area is the area of a circle having a diameter of _{φ 1 π (φ 1/2} ) 2 :( less , S ₁ ). On the other hand, as shown in FIG. 4B, when the center of the fiber sheet 10 is pressed to a predetermined depth D ₂ , the fiber sheet 10 is deformed into a conical shape. Thus the area of the fiber sheet 10 is a side area of the cone (hereinafter, S _2), and the
_{S 2 = π · (φ 1} /2) · {(φ 1/2) 2 + D 2 2} 1/2
Will be. Therefore, in order to reproduce the state in which the fiber sheet 10 in the cosmetic container is pressed to the depth D ₂ by using the measurement frame 110 shown in FIG. 3, the fiber sheet in the initial state is first subjected to an area ratio of 1. The area of the stationary state is reproduced by stretching it isotropically so as to be 05 times, and the area ratio increased from the stationary state by pressing the fiber sheet 10 of the cosmetic container against the stationary area S ₂ / S. _The fiber sheet is further isotropically stretched so as to have an elongation ratio (1.05 × S ₂ / S ₁ ) multiplied by ₁ . Then, the fiber sheet in the stretched state may be stretched on the measuring frame. When the area in the stationary state is 1 (S ₁ = 1), when the fiber sheet 10 of the cosmetic container is pressed so as to have a depth of D ₂ = 1 cm, the area ratio before and after the pressing is S ₂ / S ₁ Is 1.05 times. Therefore, in measuring the visible light transmittance, for example, in order to reproduce the tension when the fiber sheet 10 in the inner lid 3 of the cosmetic container is pressed to a depth D ₂ = 1 cm, the fiber sheet in the initial state is 1. The fiber sheet may be stretched until the area becomes 05 × 1.05 ≈ 1.10 times, and the stretched fiber sheet may be stretched on the measuring frame.

In the present invention, sample sheets (I to IX) having nine different fiber compositions are selected, and each of these sample sheets is stretched on a measuring frame to determine the visible light transmittance of each sample sheet in a stationary state. It was measured. The sample sheets (I to VIII) are fiber sheets made by braiding elastic fibers, but sample IX is a visible light of the mesh used for the inner lid using a conventional mesh as a comparative example. The transmittance was also measured.
Then, a low-viscosity, fluid cosmetic having a viscosity of 2,000 cp was placed on the fiber sheet of the sample stretched in this manner for 24 hours, and the permeability of the cosmetic was visually inspected. Next, each fiber sheet is stopped so as to correspond to a state in which the central portion of the fiber sheet of each of the above samples is deformed by a depth D ₂ = 1 cm as shown in FIG. 4B in a direction orthogonal to the plane direction. The fiber sheet of the sample in the stretched state is stretched to 1.05 times the area from the state, and the visible light transmittance is measured by stretching the fiber sheet of the sample in the stretched state on the measuring frame. It was.

Regarding this take-out performance, the container body is filled with a cosmetic having a viscosity of 60,000 cp, which has a relatively low fluidity, and as shown in FIG. 4b, the central portion of the fiber sheet 10 is pressed downward with a puff to make a cosmetic. The operation of taking out was repeated. Then, the mass of the cosmetic remaining when the cosmetic in the container body does not exude to the upper surface of the fiber sheet is measured, and if the mass is 10% or less of the mass of the initially filled cosmetic. It was judged to have good take-out performance.

The results are shown in Table 1.

以上の各種のサンプルの繊維シートを使用しての検証の結果、静止状態の可視光透過率がそれぞれ２．２％および３．１のサンプルVおよびVIIIさらに従来例のIXでは「倒立漏れ」が生じるのに対し、静止状態の可視光透過率が１．８以下のその他のサンプルでは「倒立漏れ」が生じなかった。また、化粧料の「取出し性」については静止状態×１．０５の可視光透過率が１．９％のサンプルVIでは不良で２．０％以上であれば良好であることが判明した。なお、従来のメッシュ中蓋に使用されているサンプルIXのメッシュでは静止状態の可視光透過率が４４．０と他のサンプルに比べて飛び抜けて大きく、倒立漏れが著しく流動性がある低粘度の化粧料には使用できないことが明らかである。

As a result of verification using the fiber sheets of the above various samples, "inverted leakage" occurred in the samples V and VIII with visible light transmittance of 2.2% and 3.1 in the stationary state, respectively, and in the conventional IX. On the other hand, "inverted leakage" did not occur in other samples having a visible light transmittance of 1.8 or less in the stationary state. Further, it was found that the "take-out property" of the cosmetic was poor in the sample VI having a visible light transmittance of 1.9% in the stationary state × 1.05, and was good if it was 2.0% or more. In addition, the mesh of sample IX used for the conventional mesh inner lid has a visible light transmittance of 44.0 in a stationary state, which is far larger than that of other samples, and has a low viscosity with remarkable inversion leakage and fluidity. It is clear that it cannot be used in cosmetics.

As a result of the above, the visible light transmittance of the fiber sheet is 1.8% or less when the fiber sheet is stretched on the frame in the stationary state, and the fiber sheet is stretched from the stationary state to 1.05 times in the plane direction. It is necessary that the visible light transmittance at that time is 2.0% or more.

The above-mentioned "inverted leakage" and "removability" test results are evaluated by the visible light transmittance, but the evaluation "deterioration resistance" of the test results causes the fiber sheet to wavy or loosen after a long period of time. In the evaluation of whether or not, this is considered to be a problem of the fiber itself and depends on the amount of polyurethane. Polyurethane is mixed to improve the elasticity of the fiber material, but when a certain amount of polyurethane comes into contact with cosmetics, the elasticity deteriorates (deteriorates) and the surface of the fiber sheet undulates. there is a possibility. Although this swell does not significantly affect the inverted leakage performance and the extraction performance, it results in spoiling the aesthetic appearance. Also, if the cosmetic container is not disposable and is used continuously while replenishing the cosmetic, the fiber sheet will continue to come into contact with the cosmetic for a long period of time, and no functional problems will occur. I can't say it. Therefore, for each sample stretched on the frame, the surface condition after the extraction performance test was visually observed, and if there was no swell or slack, the sample was accepted.

As a result, deterioration occurred when the amount of polyurethane was 20% or more, and no deterioration occurred when the amount of polyurethane was 15%. From this, it was found that when polyurethane is braided with polyester as the main fiber as the main fiber of the fiber sheet, the mixing ratio of the polyester of the main fiber is preferably 85% or more. Further, when the main fiber is nylon, it can be judged that it is preferable that the content is 87% or more.

In the above embodiment of the present invention, an example of a container that opens and closes by screwing an outer lid onto the container body from above is given as a cosmetic container, but the present invention is not limited to this, and the container body has a lid. It can be applied to a general compact container whose body can be opened and closed by a hinge.

Next, the method for manufacturing the inner lid will be described. The inner lid is manufactured by stretching a fiber material that satisfies the above-mentioned conditions for visible light transmittance in a state where tension is applied to the molded frame. Can be done. Basically, the visible light transmittance is 1.8% in the stationary state, which is extended from the area in the initial state (referred to as S ₀ ) to the area S ₁ corresponding to the tension when the frame is stretched. In the following, a fiber material having a visible light transmittance of more than 2.0% when the area is S ₂ = 1.05 × S ₁ is prepared, and the fiber material is changed from the initial area S ₀ to the area S ₁ The inner lid is completed by adhering it to the lower end of the frame in a stretched state until it becomes.

Of course, it is also possible to manufacture the inner lid by simultaneously molding the frame and stretching the fiber sheet using injection molding technology. FIG. 5 shows an example of an injection molding die 50 for molding the inner lid. FIG. 5 shows a vertical cross-sectional view of the mold 50 when it is cut along a surface including the vertical direction. FIG. 5 (A) shows the mold 50 in the open state, and FIG. 5 (B) shows the mold 50 in the closed state.

As shown in FIG. 5A, the illustrated mold 50 is arranged above the first mold 51 fixed at the lowermost position and the first mold 51 and can move up and down. It is composed of a second mold 52 and a third mold 53 that is arranged above the second mold 52 and can move in the vertical direction. The second mold 52 is formed with a cylindrical cavity 55 that follows the outer shape of the frame. A core 56 for forming a hollow portion of the frame is fixed to the third mold 53. In this example, the fiber material 111 is arranged between the first mold 51 and the second mold 52 in a state where a predetermined tension is applied.

As shown in FIG. 5 (B), when the mold 50 is closed, the core 56 is inserted into the cylindrical cavity 55 in the second mold 52 shown in FIG. 5 (A), and the shape of the frame is formed. A hollow cylindrical cavity 60 having a collar-shaped space 61 at the upper end corresponding to is formed. Further, the fiber material 111 is sandwiched by the upper end surface 57 of the first mold 51 and the lower end surface 58 of the core 56. A flow path of the molten resin from the runner to the gate (hereinafter, also referred to as gate 62) is also formed. The spool extends in the depth direction in the drawing and connects to the gate 62. Then, when the molten resin is injected into the cavity 60 through the gate 62, the molten resin also enters the fiber material 111 arranged at the lower end of the cavity 60. Then, when the resin is cooled, the resin is formed into the shape of a gate 62 on the outer peripheral surface (reference numeral 32 of the same figure) of the frame body (the same figure, reference numeral 31) having a flange portion (FIG. 1, reference numeral 34) on the upper end side. The body solidifies in a connected shape. Then, the mold 50 is opened to separate the molded body in the shape of the gate 62, and the fiber material 111 is cut along the circular outer shape of the lower end (FIG. 2, reference numeral 35) of the frame body (FIG. 1, reference numeral 3). The inner lid (FIG. 1, reference numeral 3), which is the final molded product, is completed.

In the above-mentioned cosmetic container, a fiber sheet was stretched so as to close the opening on the lower end side of the frame body, and the fiber sheet member was adhered to the lower end surface of the frame body to form an inner lid. When the adhesive strength with the fiber sheet is insufficient, the adhesive area may be appropriately increased.

The inner lid and frame of the cosmetic container of the above embodiment have a cylindrical shape, but of course, they may have a square tubular shape. The shape is such that the inner peripheral surface of the container body is in close contact with the outer peripheral surface of the square tubular frame.

1 Cosmetic container, 2 Outer lid, 3 Inner lid, 4 Container body, 10, 111 Fiber sheet, 31 Frame

Claims (8)

It is provided with a container body for accommodating cosmetics having a viscosity in the range of 2,000 cp to 60,000 cp and an inner lid attached to the opening of the container body .
The inner lid is formed by stretching a fiber sheet made of elastic fibers on the frame body.
The fiber sheet is stretched on the frame in an isotropically stretched stationary state so that the area is 1.05 times that of the initial state in which tension is not applied to the stretchable fibers. ,
Visible light transmittance of the fiber sheet, the quiescent der 1.8% or less in the state Rutotomoni, in the extended state of the fiber sheet was isotropically stretched 1.05 times the area of the stationary state 2.0% or more,
A cosmetic container characterized by that. The cosmetic container according to claim 1, wherein a fiber sheet made by braiding elastic fibers is used as the fiber sheet. The cosmetic container according to claim 2, wherein the fiber sheet is a braided sheet made of warp knitting. The cosmetic container according to claim 2 or 3, wherein the main fiber of the fiber sheet is made of polyester or nylon, and polyurethane is braided as an auxiliary fiber. The cosmetic container according to claim 4, wherein when polyester is used as the main fiber, the polyester is contained in an amount of 85% or more. The cosmetic container according to claim 4, wherein when nylon is used as the main fiber, the nylon is contained in an amount of 87% or more. The inner lid constituting the cosmetic container according to any one of claims 1 to 6 . A method for manufacturing an inner lid with a fiber sheet in which a fiber material is stretched on the end face of a hollow tubular frame.
The fiber material, the visible light transmittance when the tension was isotropically stretched from the area S ₀ until the area S _{1 =} 1.05 × S ₀ in the initial state that has not been multiplied by 1.8% In the following, the visible light transmittance when isotropically stretched until the area becomes 1.05 × S ₁ is larger than 2.0%.
A fiber elongation step in which the fiber material is isotropically elongated from the area S ₀ to the area S ₁ ;
An upholstery step of adhering the peripheral edges of one of the front and back surfaces of the fiber material stretched by the fiber stretching step to the end face of the frame body,
A method for manufacturing an inner lid with a fiber sheet, which comprises.

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