JP2021104351A - Cosmetic holding body, and cosmetic container housed with the same - Google Patents

Abstract

To provide a cosmetic holding body capable of suppressing swelling even when impregnating cosmetic with fluidity, and a cosmetic container housed with the same.SOLUTION: A cosmetic holding body 10 is configured of an aggregate of a fiber with a core-sheath structure. The fiber with a core-sheath structure comprises a thermoplastic resin, and the core part is configured of a thermoplastic resin having a melting point higher than that of the sheath part. In the aggregate of the fiber with a core-sheath structure, the fiber with a core-sheath structure is fused in part of the sheath part. The fiber with a core-sheath structure comprises a polyolefin-based resin, the fiber with a core-sheath structure has a thickness of 2.0-15dtex, and the aggregate of the fiber with a core-sheath structure has an apparent density of 0.03-0.10 g/cm3.SELECTED DRAWING: Figure 1

Description

The present invention relates to a cosmetic holder that impregnates and holds a fluid cosmetic, and a cosmetic container that houses the cosmetic holder.

Conventionally, as a holder of a fluid cosmetic such as a liquid foundation, there is one made of urethane foam (Patent Documents 1 and 2).

However, the cosmetic holder made of urethane foam had a large swelling when impregnated with the cosmetic, and the swelling was particularly remarkable with respect to the emulsion cosmetic containing an ultraviolet absorber (sunscreen). Therefore, the urethane foam cosmetic holder is not suitable for cosmetics containing an ultraviolet absorber.

Japanese Unexamined Patent Publication No. 2003-12457 Japanese Patent Application Laid-Open No. 2013-530252

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 capable of suppressing swelling even when impregnated with a fluid cosmetic, and a cosmetic container containing the cosmetic holder. And.

The first aspect is characterized in that, in a cosmetic holder that impregnates and holds a fluid cosmetic, it is composed of an aggregate of fibers having a core-sheath structure.

In the second aspect, in the first aspect, the core-sheathed fiber is made of a thermoplastic resin, and the core portion is made of a thermoplastic resin having a melting point higher than that of the sheathed portion. The aggregate is characterized in that the fibers of 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, in claim 1 or 2, the fiber of the core-sheath structure includes an eccentric core-sheath type composite fiber having a spiral shape.

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

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

In the sixth aspect, in any one of the first to fifth aspects, the aggregate of fibers having the core-sheath structure has an apparent density (JIS K 6400-1 compliant) of 0.03 to 0.10 g. characterized in that it is a / cm ^3.

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

According to the first aspect, since the cosmetic holder is composed of an aggregate of fibers having a core-sheath structure, it is the sheath portion that constitutes the outer periphery of the fibers that comes into contact with the cosmetic impregnated in the cosmetic holder. 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 the swelling of the entire cosmetic holder can be suppressed.

According to the second aspect, in the aggregate of the fibers of the core-sheath structure, since the fibers of the core-sheath structure are fused at a part of the sheath portion, a gap can be formed between the fibers, and the cosmetic can be used. Impregnation retention can be improved.

According to the third aspect, since the fiber of the core-sheath structure contains the eccentric core-sheath type composite fiber having a spiral shape, the fiber aggregate is excellent in elasticity and returnability after shape deformation, and continuous use is good. It becomes.

According to the fourth aspect, since both the core portion and the sheath portion of the fiber of the core-sheath structure are made of a polyolefin-based resin, the fiber does not swell due to the composition of the liquid cosmetic product.

According to the fifth aspect, by setting the thickness of the fiber of the core-sheath structure to 2.0 to 15 dtex, the cosmetic holder can be easily impregnated with the cosmetic and the required capacity can be maintained. ..

According to the sixth aspect, the core-sheath-structured fiber aggregate has an apparent density of 0.03 to 0.10 g / cm ^3, which is suitable for transferring the cosmetic with the cosmetic application member. Can give a lot of elasticity.

According to the seventh aspect, since the cosmetic container contains a cosmetic holder made of an aggregate of fibers having a core-sheath structure, the cosmetic holder is impregnated with cosmetics and carried or stored. It is convenient for continuous use by suppressing the swelling of the cosmetic holder due to the impregnated cosmetic.

It is a perspective view of the cosmetic holding body which concerns on one Embodiment of this invention.

The cosmetic holder 10 of the embodiment shown in FIG. 1 impregnates and holds a fluid cosmetic, and is composed of an aggregate of fibers having a core-sheath structure.
The fiber of the core-sheath structure is composed of a fiber in which the circumference of the core portion is surrounded by the sheath portion. It is preferable that the fiber having a core-sheath structure is made of a thermoplastic resin and the core portion is made of a thermoplastic resin having a melting point higher than that of the sheath portion. The material of the core portion and the sheath portion of the fiber having the core-sheath structure is not particularly limited, but a polyolefin-based resin is more preferable because it does not deteriorate over time due to cosmetic components.

Further, among the polyolefin-based 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.). Those which are configured and whose sheath portion is composed of polybutene (melting point 127 ° C.) can be used. Among them, the fiber using polybutene-1 in the sheath portion has a high molecular weight and is excellent in bulk recovery when heat is applied. Further, it is preferable because the compression set is small and the compatibility with polypropylene which is the core portion is good. Further, the fiber having a core-sheath structure having a thickness of 2.0 to 15 dtex is more preferable from the viewpoint of retaining the impregnation of the cosmetic.

Further, the fiber of the core-sheath structure may be either a manifest crimp that expresses three-dimensional crimp or a latent crimp that develops three-dimensional crimp by heating, and the crimp is wavy or spiral. Either is fine. Among them, fibers in which a spiral shape and a corrugated shape are mixed are preferable because they are excellent in elasticity of the fiber aggregate and returnability after shape deformation.
Further, an eccentric core sheath type composite fiber is preferable for three-dimensional crimping. The shape of the core of the eccentric core sheath type may be an elliptical shape, a Y shape, an X shape, or the like in addition to the circular shape, and the cut shape of the eccentric core sheath type fiber may be an elliptical shape other than the circular shape. It may be an irregular shape such as a Y shape, an X shape, a well shape, a polygon shape, a star shape, or a hollow shape.
For the crimpable composite fiber and the fiber assembly using the same, Japanese Patent Publication No. 2011-021300 can also be referred to.

As the aggregate of the fibers having the core-sheath structure, those produced by a known method can be used. For example, a thermal bond method, a needle punching method, a water flow confounding method and the like can be mentioned. In particular, those fused with a part of the sheath portion of the fiber of the core-sheath structure are more preferable as an aggregate of the fibers of the core-sheath structure. The manufacturing method is not limited, and can be performed by, for example, a hot air conveyor furnace type, a mold forming type, a method using a mesh belt (method described in Japanese Patent No. 4195043), and then cutting by pressing or the like. By treatment, the size is suitable for the cosmetic holder. The aggregate fused at a part of the sheath portion of the fiber having the core-sheath structure is produced when the fusion of the fibers is equal to or higher than the melting point of the sheath portion and lower than the melting point of the core portion.

The aggregate of fibers having the core-sheath structure preferably has an apparent density (JIS K 6400-1 compliant) of 0.03 to 0.10 g / cm ³ from the viewpoint of impregnation retention of cosmetics. The size of the aggregate of the core-sheath structural fibers is not particularly limited, and is determined according to the ease of use, the size of the container or the like to be stored, and the like.

The cosmetic holder 10 is carried or stored in a state of being stored in the inner plate of the cosmetic container. That is, the cosmetic container has a configuration in which the cosmetic holder is housed in the container body. The container body includes a storage container that serves as the container body, and a lid that is openably and closably combined with the storage container. The storage container is provided with a storage recess having an open upper surface, and the cosmetic medium plate is stored in the storage recess.
On the other hand, the lid 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, and by covering the storage container, the storage recess and the cosmetic inner plate are covered with a lid. can do. In this embodiment, the cosmetic holder is stored in the middle plate, and the liquid cosmetic is impregnated and held in the cosmetic holder.

Further, the container body may be capable of storing a cosmetic tool such as a puff together with the cosmetic holder. For example, a container body in which a cosmetic holder storage unit and a makeup tool storage unit are provided side by side, or a puff or the like laminated on the cosmetic holder body so that the container can be stored. Be done.

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

In order to confirm the swelling resistance of the cosmetic holder of the present invention, the swelling resistance was examined with respect to the following Examples and Comparative Examples.

Example 1: The core-sheath-structured fiber has a core portion of PP (polypropylene), a sheath portion of PE (polyethylene), and a thickness of 2.2 dtex. It is made by Corporation, has an apparent density of 0.04 g / cm ³ , and has the size before immersion in Table 1. The volume was calculated from the dimensions (the same applies hereinafter).
Example 2: The core-sheath fiber has a core portion of PP (polypropylene), a sheath portion of PE (polyethylene), and a thickness of 2.2 dtex. It is made by Corporation, has an apparent density of 0.06 g / cm ³ , and has the size before immersion in Table 1.
Example 3: The core-sheath-structured fiber has a core portion of PP (polypropylene), a sheath portion of PE (polyethylene), and a thickness of 2.2 dtex, and the core-sheath-structured fiber aggregate has an apparent density of 0. It is 08 g / cm ³ and consists of the size before immersion in Table 1.
Example 4: The core-sheath-structured fiber has a core portion of PP (polypropylene), a sheath portion of PE (polyethylene), and a thickness of 6.7 dtex, and the core-sheath-structured fiber aggregate has an apparent density of 0. It is 04 g / cm ³ and consists of the size before immersion in Table 1.
Example 5: The core-sheath-structured fiber has a core portion of PP (polypropylene), a sheath portion of PE (polyethylene), and a thickness of 6.7 dtex, and the core-sheath-structured fiber aggregate has an apparent density of 0. It is 06 g / cm ³ and consists of the size before immersion in Table 1.
Example 6: The core-sheath-structured fiber has a core portion of PP (polypropylene), a sheath portion of PE (polyethylene), and a thickness of 6.7 dtex, and the core-sheath-structured fiber aggregate has an apparent density of 0. It is 08 g / cm ³ and consists of the size before immersion in Table 1.
Example 7: The fiber of the core-sheath structure has a core portion of PP (polypropylene), a sheath portion of PB (polybutene-1), and a thickness of 6.7 dtex, an eccentricity of 25%, and a cross-sectional shape having a center of gravity position. It is a misaligned double-circle, spiral-shaped crimped fiber. The core-sheath fiber aggregate has a product name: Buffer, manufactured by Inoac Corporation, an apparent density of 0.04 g / cm ³ , and is the size before immersion in Table 1.

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

The cosmetic holders 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 whole was immersed, and then taken out and measured in dimensions. , Calculate the volume from the obtained dimensions, and then set the rate of change to {(volume of sample piece after immersion)-(volume of sample piece before immersion)} ÷ (volume of sample piece before immersion) x 100 ( %) Was calculated by the formula.
The dimensions, volume, and change rate values after immersion in the ultraviolet absorber are as shown in Table 1, and the swelling resistance was judged from the obtained change rate.

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%. Yes, Examples 1 to 7 had a smaller rate of change than Comparative Examples 1 to 3, and were excellent in swelling resistance. The rate of change is negative in some examples because the aggregates of fibers have shrunk due to moisture.

Further, instead of the ultraviolet absorber, a commercially available cosmetic containing an ultraviolet absorber was used to examine the swelling resistance of the Examples and Comparative Examples.
The cosmetics used are product names: B. A The Creamy Foundation (B3), manufactured by POLA Co., Ltd., contains ultraviolet absorbers: ethylhexyl methoxycinnamate and hexyl diethylaminohydroxybenzoylbenzoate.
As a result, in Examples 1 to 6, the rate of change was 5.4% or less, whereas 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.

As described above, the cosmetic holder of the present invention has less swelling to the cosmetic and can be used for the cosmetic containing an ultraviolet absorber.

10 Cosmetic holder

Claims (8)

A cosmetic holder that impregnates and holds a fluid cosmetic, and is characterized by comprising only an aggregate of fibers having a core-sheath structure. A cosmetic holder that impregnates and holds fluid cosmetics, wherein both the core and the sheath of the fibers are aggregates of fibers having a core-sheath structure that is a polyolefin resin. A cosmetic holder that impregnates and holds a fluid cosmetic, wherein the sheath is made of an aggregate of fibers having a core-sheath structure of polyethylene or polybutene-1. The core-sheath-structured fibers are made of a thermoplastic resin, and the core portion is made of a thermoplastic resin having a higher melting point than the sheath portion. The cosmetic holder according to any one of claims 1 to 3, wherein a part of the sheath portion is fused. The cosmetic holder according to any one of claims 1 to 4, wherein the fiber having a core-sheath structure contains an eccentric core-sheath type composite fiber having a spiral shape. The cosmetic holder according to any one of claims 1 to 5, wherein the fiber having a core-sheath structure has a thickness of 2.0 to 15 dtex. The aggregate 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 , according to any one of claims 1 to 6. The listed cosmetic holder. In a cosmetic container containing a cosmetic holder that impregnates and holds fluid cosmetics.
The cosmetic holder is a cosmetic container characterized by being composed of an aggregate of fibers having a core-sheath structure.

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