JP7335287B2 - Cosmetic holder and cosmetic container containing it - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cosmetic carrier impregnated with fluid cosmetics and a cosmetic container containing the cosmetic carrier.

BACKGROUND ART Conventionally, there is a holder made of urethane foam as a holder for fluid cosmetics such as liquid foundation (Patent Documents 1 and 2).

However, the cosmetic carrier made of urethane foam swells greatly when impregnated with cosmetics, and in particular, it swells remarkably with emulsion cosmetics containing ultraviolet absorbers (sunscreens). Therefore, the urethane foam cosmetic carrier is not suitable for cosmetics containing UV absorbers.

JP-A-2003-12457 Japanese Patent Publication No. 2013-530252

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a cosmetic holder that can suppress swelling even when impregnated with a fluid cosmetic, and a cosmetic container containing the same. and

A first aspect is characterized in that the cosmetic support for impregnating and holding a fluid cosmetic is made of an assembly of fibers having a core-sheath structure.

In a second aspect, in the first aspect, the core-sheath structure fiber is made of a thermoplastic resin, and the core portion is made of a thermoplastic resin having a higher melting point than the sheath portion, and the core-sheath structure fiber is made of a thermoplastic resin. The assembly is characterized in that the fibers having the core-sheath structure are fused at a part of the sheath portion.

A third aspect is characterized in that, in the first or second aspect, the fiber having the core-sheath structure includes an eccentric core-sheath type conjugate fiber having a spiral shape.

A fourth aspect is characterized in that, in any one of the first to third aspects, both the core and the sheath of the fiber having the core-sheath structure are made of polyolefin resin.

A fifth aspect is characterized in that in any one of the first to fourth aspects, the thickness of the fiber having the core-sheath structure is 2.0 to 15 dtex. In addition, dtex (decitex) represents the weight (gram unit) of the thread|yarn of length 10000m.

A sixth aspect is any one of the first to fifth aspects, wherein the assembly of fibers having a core-sheath structure has an apparent density (JIS K 6400-1 compliant) of 0.03 to 0.10 g. / cm ³ .

A seventh aspect is characterized by a cosmetic container containing the cosmetic holder according to any one of the first to sixth aspects.

According to the first aspect, since the cosmetic carrier is composed of an assembly of fibers having a core-sheath structure, the cosmetic impregnated in the cosmetic carrier is brought into contact with the sheath portion constituting the outer periphery of the fibers. Since the inner core portion surrounded by the sheath does not come into contact with the cosmetic, at least the core portion can be prevented from being affected by the cosmetic, and swelling of the entire cosmetic holding body can be suppressed.

According to the second aspect, in the assembly of fibers having a core-sheath structure, since the fibers having a core-sheath structure are fused at a part of the sheath portion, gaps can be formed between the fibers, and the cosmetic can It is possible to improve the impregnation retention of the.

According to the third aspect, since the fiber having the core-sheath structure contains the eccentric core-sheath type conjugate fiber having a spiral shape, the fiber aggregate has excellent elasticity and resilience after shape deformation, and is excellent in continuous use. becomes.

According to the fourth aspect, since both the core portion and the sheath portion of the fibers having a core-sheath structure are made of a polyolefin resin, they are not swollen by the liquid cosmetic composition.

According to the fifth aspect, by setting the thickness of the fibers of the core-sheath structure to 2.0 to 15 dtex, the cosmetics can be easily impregnated into the cosmetics holding body, and the required capacity can be held. .

According to the sixth aspect, the assembly of fibers having a core-sheath structure has an apparent density of 0.03 to 0.10 g/cm ³ , so that it is suitable for transferring the cosmetic by the cosmetic applying member. elasticity can be given.

According to the seventh aspect, the cosmetic container accommodates the cosmetic holding body composed of an assembly of fibers having a core-sheath structure. In addition, it is convenient for continuous use while suppressing swelling of the cosmetic carrier due to the impregnated cosmetic.

1 is a perspective view of a cosmetic carrier according to one embodiment of the present invention; FIG.

A cosmetic support 10 of one embodiment shown in FIG. 1 impregnates and holds fluid cosmetics, and is composed of an aggregate of fibers having a core-sheath structure.
The fiber having a core-sheath structure is composed of a fiber in which a core portion is surrounded by a sheath portion. The core-sheath structure fiber is preferably made of a thermoplastic resin, and the core portion is preferably made of a thermoplastic resin having a higher melting point than the sheath portion. Materials for the core portion and the sheath portion of the fibers having a core-sheath structure are not particularly limited, but polyolefin resins are more preferable because they do not deteriorate over time due to components of cosmetics.

Furthermore, among polyolefin resins, the core portion is made of polypropylene (melting point 165°C) and the sheath portion is made of polyethylene (melting point 130°C), or the core portion is made of polypropylene (melting point 165°C). and the sheath portion is made of polybutene (melting point 127° C.). Among them, the fiber using polybutene-1 in the sheath portion has a high molecular weight, and is excellent in bulk recoverability when heat is applied. Furthermore, it is preferable because it has a low compression set and good compatibility with the polypropylene core. Further, the core-sheath structure fiber preferably has a thickness of 2.0 to 15 dtex from the standpoint of retaining the impregnation of the cosmetic.

In addition, the fiber having the core-sheath structure may be either an actual crimp that develops a three-dimensional crimp or a latent crimp that develops a three-dimensional crimp by heating, and the crimp may be wavy or helical. Either is fine. Among them, a mixture of helical and wavy fibers is preferable because of excellent elasticity of the fiber assembly and resilience after shape deformation.
Furthermore, eccentric core-sheath type conjugate fibers are preferred for three-dimensional crimping. The shape of the core portion of the eccentric core-sheath type may be not circular, but may be elliptical, Y-shaped, X-shaped, or other irregular shape. It may be Y-shaped, X-shaped, I-shaped, polygonal, star-shaped, or other irregular or hollow shape.
Japanese Patent Publication No. 2011-021300 can also be referred to for the crimpable conjugate fiber and the fiber assembly using the same.

As the assembly of fibers having a core-sheath structure, one manufactured by a known method can be used. For example, a thermal bond method, a needle punch method, a hydroentanglement method, and the like can be used. In particular, an aggregate of the core-sheath structure fibers in which a part of the sheath portion of the core-sheath structure is fused is more preferable. The manufacturing method is not limited, and for example, it can be performed by a hot air conveyor furnace method, a mold molding method, a method using a mesh belt (method described in Japanese Patent No. 4195043), etc., and then cutting such as pressing. It is processed to a size suitable for a cosmetic carrier. In addition, the production of an assembly in which a part of the sheath portion of the fibers having the core-sheath structure is fused is performed at a temperature equal to or higher than the melting point of the sheath portion and less than the melting point of the core portion.

Further, the aggregate of fibers having a core-sheath structure preferably has an apparent density (according to JIS K 6400-1) of 0.03 to 0.10 g/cm ³ from the standpoint of retaining impregnation of cosmetics. Moreover, the size of the assembly of the core-sheath structure fibers is not particularly limited, and is determined according to the ease of use, the size of the container in which the fiber is to be stored, and the like.

The cosmetic holder 10 is carried or stored while being housed in the middle plate of the cosmetic container. That is, the cosmetic container is configured such that the cosmetic holder is accommodated in a container body. The container body includes a storage container serving as a container body, and a lid body combined with the storage container so as to be openable and closable. The storage container is provided with a storage recess having an open upper surface, and a cosmetic inner tray is stored in the storage recess.
On the other hand, the lid body is connected to the upper part of the storage container by a hinge or the like, or can be opened and closed by a screw type. can do. In this embodiment, the cosmetic holding body is accommodated in the middle plate, and the liquid cosmetic is impregnated and held in the cosmetic holding body.

Further, the container main body may be capable of accommodating a cosmetic tool such as a puff together with the cosmetic holder. For example, the container main body has a cosmetic holding body storage section and a makeup tool storage section arranged side by side, and a cosmetic holding body in which a puff or the like can be stacked and stored. be done.

The cosmetic with which the cosmetic support is impregnated is not particularly limited as long as it has fluidity, and a cosmetic containing an ultraviolet absorber is one of suitable cosmetics. When using the cosmetic impregnated in the cosmetic carrier, the surface of the cosmetic carrier is rubbed with a finger or a cosmetic tool such as a puff, and the cosmetic impregnated and held in the cosmetic carrier is rubbed with a finger or a puff. It is done by attaching it to a makeup tool.

In order to confirm the swelling resistance of the cosmetic support of the present invention, the following examples and comparative examples were examined for swelling resistance.

Example 1: The core-sheath structure fiber consists of PP (polypropylene) as the core, PE (polyethylene) as the sheath, and a thickness of 2.2 dtex. Corporation, apparent density is 0.04 g/cm ³ , and size before immersion in Table 1. In addition, the volume was calculated from the dimensions (the same applies hereinafter).
Example 2: The core-sheath structure fiber consists of PP (polypropylene) as the core, PE (polyethylene) as the sheath, and a thickness of 2.2 dtex. Co., Ltd., has an apparent density of 0.06 g/cm ³ and has the size before immersion in Table 1.
Example 3: The fibers with a core-sheath structure consist of PP (polypropylene) in the core, PE (polyethylene) in the sheath, and a thickness of 2.2 dtex. 08 g/cm ³ and consists of the sizes before immersion in Table 1.
Example 4: The fibers with a core-sheath structure consist of PP (polypropylene) in the core, PE (polyethylene) in the sheath, and a thickness of 6.7 dtex. 04 g/cm ³ and consists of the sizes before immersion in Table 1.
Example 5: The core-sheath structure fiber consists of PP (polypropylene) in the core portion, PE (polyethylene) in the sheath portion, and a thickness of 6.7 dtex. 06 g/cm ³ and consists of the sizes before immersion in Table 1.
Example 6: The fibers with a core-sheath structure consist of PP (polypropylene) in the core, PE (polyethylene) in the sheath, and a thickness of 6.7 dtex. 08 g/cm ³ and consists of the sizes before immersion in Table 1.
Example 7: A fiber with a core-sheath structure has a core portion of PP (polypropylene), a sheath portion of PB (polybutene-1), a thickness of 6.7 dtex, and an eccentricity of 25%. Displaced double circles, spiral crimped fibers. The assembly of fibers having a core-sheath structure has a product name: Buffer, manufactured by INOAC Corporation, has an apparent density of 0.04 g/cm ³ , and has the size shown in Table 1 before immersion.

Comparative Example 1: A single thermoplastic resin fiber made of polypropylene resin with a thickness of 5.6 dtex and a thermoplastic resin fiber with a core-sheath structure made of polypropylene/polyethylene resin with a thickness of 2.2 dtex were mixed at a weight ratio of 7:3. As a fiber assembly having an apparent density of 0.05 g/cm ³ manufactured by a thermal bond method, the size before immersion in Table 1 was used.
Comparative Example 2: Polyether-based urethane foam (network type with cell membrane removed), number of cells: 40/25 mm, apparent density: 0.03 g/cm ³ , product name: CFH-40, manufactured by INOAC CORPORATION, Table 1 of the size before immersion was used.
Comparative Example 3: Polyester-based urethane foam (network type with cell membrane removed), number of cells: 30/25 mm, apparent density: 0.03 g/cm ³ , product name: MF-30, manufactured by INOAC CORPORATION, shown in Table 1 The size before immersion was used.

The cosmetic supports of Examples and Comparative Examples were immersed in an ultraviolet absorber (product name: Ubinal (registered trademark) A Plus B, manufactured by BASF Japan) for 24 hours so that the entire surface was immersed, and then taken out to measure dimensions. , The volume is calculated from the obtained dimensions, and the rate of change is {(volume of sample piece after immersion) - (volume of sample piece before immersion)} ÷ (volume of sample piece before immersion) x 100 ( %).
The dimensions, volume and rate of change after immersion in the ultraviolet absorber are as shown in Table 1, and the swelling resistance was judged based on the rate of change obtained.

In Examples 1 to 7, the rate of change was 6.17% (-6.17%) or less, whereas in Comparative Examples 1 to 3, the rate of change was 12.54% to 18.47%. In Examples 1 to 7, the rate of change was smaller than that in Comparative Examples 1 to 3, and the swelling resistance was excellent. It should be noted that the reason why the rate of change is a negative value in some examples is that the aggregate of fibers contracted due to moisture.

In addition, instead of the ultraviolet absorber, a commercially available cosmetic containing an ultraviolet absorber was used to examine the swelling resistance of the above examples and comparative examples.
The cosmetic used was the product name: B.I. A The Creamy Foundation (B3), manufactured by POLA Inc., contains ethylhexyl methoxycinnamate and hexyl diethylaminohydroxybenzoylbenzoate as UV absorbers.
The results show that in Examples 1 to 6, the rate of change was 5.4% or less, while in Comparative Examples 1 to 3, the rate of change was 12.6% to 18.5%. Examples 1 to 7 had a smaller rate of change than Comparative Examples 1 to 3 and were excellent in swelling resistance.

Thus, the cosmetic carrier of the present invention swells less in cosmetics and can be used for cosmetics containing UV absorbers.

10 cosmetic carrier

Claims (2)

In a cosmetic carrier that impregnates and holds a fluid cosmetic,
The sheath consists of an aggregate of fibers with a core-sheath structure consisting only of polybutene-1,
A cosmetic carrier, wherein the surface of the cosmetic carrier is rubbed with a cosmetic tool to allow the fluid cosmetic to adhere to the cosmetic tool. 2. The cosmetic carrier according to claim 1, wherein said fiber having a core-sheath structure has a thickness of 6.7 to 15 dtex.

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