KR20200084989A - Puff for make-up - Google Patents

Abstract

The present invention relates to a puff for make-up, in which a grip surface is formed of ester-based thermoplastic urethane (TPU) to secure durability and prevent discoloration and cracking, and a polyurethane (PU) film is coated on the upper part of the TPU to transfer various patterns thereon while increasing durability and securing a soft touch, thereby increasing usability. According to one embodiment of the present invention, the puff for make-up comprises: a use surface formed of PU; the grip surface formed of TPU; a PU film formed on and attached to the grip surface; and cushion foam filled between the use surface and the grip surface. Edge areas of the use surface and the grip surface are bonded by hot melting, and the use surface and the grip surface are bonded to the cushion foam by hot melting. Fine pores are formed on the use surface and the grip surface has a thickness of 100 to 300 μm, a density of 1.15 to 1.25 g/cm^3, and a hardness of 86 to 90 Shore A. The puff further comprises a grip and both end parts are bonded to the PU film by hot melting.

Description

Cosmetic puff {PUFF FOR MAKE-UP}

The present invention relates to a cosmetic puff.

Cosmetic puffs are used to apply cosmetics to the skin. Conventional puffs are made of a polyurethane-made cover made of a use surface and a gripping surface, and a cushion foam is inserted therebetween.

However, in the conventional puff, as the usage time elapses, hydrolysis occurs and cracks propagate and break frequently. Accordingly, Patent Publication No. 10-2017-0125661 (Prior Art 1) discloses a technique for forming a gripping surface with conventional thermoplastic polyurethane (TPU) to reduce hydrolysis.

However, in the case of forming a gripping surface with TPU, roughness due to hardness of the TPU is induced, so that a soft feeling is not expressed when used, and there is a problem that the desired pattern cannot be easily transferred to the TPU. Further, even if the gripping surface is formed of TPU, a wide variety of durability is exhibited depending on its density or hardness, and the prior art document 1 has no such recognition.

[Advanced technical literature]

1. Published Patent No. 10-2017-0125661

The present invention is to solve the problems of the prior art described above, the object of the present invention is to provide a cosmetic puff capable of free pattern transfer while smoothly forming the gripping surface while securing the durability of the gripping surface itself.

Cosmetic puff according to an aspect of the present invention is a use surface formed of polyurethane, a gripping surface formed of a thermoplastic polyurethane (TPU), a PU film formed on the gripping surface, a cushion foam filled between the use surface and the gripping surface, Containing, and the border area of the use surface and the gripping surface are bonded by heat fusion to each other, the use surface and the gripping surface are respectively bonded by cushion foam and heat fusion, micropores are formed on the use surface, the wave The ground has a thickness of 100 to 300 μm, a density of 1.15 to 1.25 g/cm 3, and a hardness of 86 to 90 Shore A. The cosmetic puff further includes a handle, and the handle has both ends of the PU film. Heat-sealed.

At this time, the use surface may be formed of a ruby cell or a non-latex-based polyurethane.

In addition, the cosmetic puff may be formed by preheating the gripping surface at 130 to 145 degrees for 25 to 30 seconds, preheating the use surface for 25 to 30 seconds at 160 to 175 degrees, and heat-sealing each other.

In addition, the handle may be attached in the form of a line adhesive to the end of the PU film.

In addition, the PU film is a cosmetic puff, characterized in that the pattern is transferred by applying a PU mixture to a substrate on which a pattern is formed, and then peeling the substrate.

In the present invention, the gripping surface itself is composed of an ester-based TPU to secure its own durability and prevent discoloration and cracking, while the upper portion of the TPU is further coated with a PU film to further increase its durability while guaranteeing a soft feeling of use while transferring various patterns To further improve usability.

1 is a perspective view of a cosmetic puff in one embodiment of the present invention.
FIG. 2 is a cross-sectional view illustrating a cross-section of AA′ in FIG. 1.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. The present invention can be applied to various changes and can have various embodiments, and specific embodiments will be described in detail with reference to the drawings. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from other components.

For example, the first component may be referred to as a second component without departing from the scope of the present invention, and similarly, the second component may be referred to as a first component. The term and/or includes a combination of a plurality of related described items or any one of a plurality of related described items.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms, such as those defined in a commonly used dictionary, should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

Hereinafter, a cosmetic puff according to an embodiment of the present invention will be described. 1 is a perspective view of a cosmetic puff in an embodiment of the present invention, Figure 2 is a cross-sectional view showing a cross-section of the area A-A' of Figure 1

Referring to the drawings, the cosmetic puff 10 in one embodiment of the present invention includes a use surface (1), a gripping surface (2), a cushion foam (3), a PU film (4) coated on the gripping surface Made, it may further include a handle (5) as shown. At this time, the rim areas of the use surface 1 and the gripping surface 2 are joined by heat fusion to each other, and the use surface 1 and the gripping surface 2 are joined by the cushion foam 3 and heat fusion, respectively. .

The use surface 1 is a cosmetic puff (P) is a normal latex material NBR (NITRILE BUTADIENE RUBBBER), SBR (SBR; STYRENE BUTADIENE RUBBBER), NAL (NR; NATURAL RUBBER), ruby cell (RUBYCELL ; Wet URETHANL), coat Bella (COTTON VELOUR), and may be formed of any one of a thermoplastic elastomer, may be formed of a non-latex material. However, it may be preferable to include a thermoplastic elastomer relatively for thermal welding with a gripping surface to be described later. However, the present invention is not limited to this. In addition, the cushion foam 3 is filled between the use surface 1 and the gripping surface and may be formed of a polyurethane foam.

At this time, the use surface 10 is formed by applying a polyurethane mixture on the substrate and then solidifying it again, washing the composite, which is the entirety of the polyurethane and the substrate, to remove additives to form micropores, followed by drying. The micropore significantly increases the breathability and flexibility of the cosmetic puff. In addition, the micropores prevent the residual of cosmetic oil and significantly reduce the phenomenon of puffs containing cosmetic oil.

Here, the mixed solution containing polyurethane is formed by mixing a polyurethane resin composition with an additive containing at least one of sucrose, inorganic salt, starch, and polyhydric alcohol. At this time, sucrose or inorganic salts are water-soluble and have a predetermined particle size distribution, and chlorides, sulfates, etc., such as sugar, sodium, potassium, magnesium, and calcium can be used. At this time, when sucrose or an inorganic salt is used as an additive, it is more advantageous to further include a polyhydric alcohol for peeling the substrate in a later step. The polyhydric alcohol refers to alcohols in which a plurality of hydrogens of a hydrocarbon are substituted with hydroxyl groups.

The gripping surface 2 is formed of an ester-based thermoplastic polyurethane (TPU). The thermoplastic polyurethane (Thermoplastic Poliyurethane: TPU) is a compound that is an addition reaction of isocyanate and polyol and has a urethane bond in the molecular structure, and refers to a linear polymer. High elasticity, mechanical stiffness, abrasion resistance, oil resistance, chemical resistance and cold resistance due to elasticity between the rubber and plastic. In addition, since it is easy to blend with other resins, some other resins can be mixed in a pellet form to use a molding machine for general thermoplastic resins. Because it has such properties as an elastomer, it is not torn or cracked even by a slight external force, and also has excellent compatibility or adhesion with a urethane sealant. It is a unique molding material that has excellent abrasion resistance, flexibility, and discoloration resistance, and has excellent tensile strength. It is particularly easy to process with excellent mechanical properties, extrusion molding, injection molding, and calendering. In addition, TPU is excellent in tension, resilience, and elasticity, so it is durable and does not wear well. It is harder than silicon and does not adhere well to dust.

Further, in the case of a thickness of 100 to 300 μm, the gripping surface according to an embodiment of the present invention has a density of 1.15 to 1.25 g/cm 3 and a hardness of 86 to 90 Shore A to secure its durability. The significance of numerical limitation is explained in Experimental Example 1.

Experimental Example 1

When the thickness of the use surface was 150 µm and the hardness was 88 Shore A, tearing strength was measured according to ASTM D1004 standards with respect to the density of TPU on the ground surface. Comparative Examples 1 and 2 prepared specimens having a relatively high density among ether-based thermoplastic polyurethanes, and Examples 1 to 3 and Comparative Examples 3 to 4 prepared ester-based thermoplastic polyurethane specimens.

Comparative Example 1 Comparative Example 2 Example 1 Example 2 Example 3 Comparative Example 3 Comparative Example 4 density 1.05 1.10 1.15 1.20 1.25 1.30 1.35 Tear strength
(N/cm) 320 340 873 950 936 820 766

Since Comparative Examples 1 and 2 are ether-based, it was found that the tear strength was very weakly distributed even when the density was high, and in Comparative Examples 3 and 4, cracks occurred during the experiment due to an increase in the relative molding compression force during manufacturing and tear. The intensity was found to be lower.

On the other hand, in the cosmetic puff according to an embodiment of the present invention, the edge regions of the use surface 1 and the gripping surface 2 are joined to each other by thermal welding. For this purpose, the gripping surface 2 is preheated at 130 to 145 degrees for 25 to 30 seconds, and the used surface is preheated for 25 to 30 seconds at 160 to 175 degrees, and then the heat-sealing of the border regions is performed. Since it is placed and heat-sealed, a space is not formed between the use surface, the gripping surface, and the cushion foam, resulting in a perfect fit.

On the other hand, the PU film 4 is adhesively formed on the gripping surface 2. The PU film 4 is not formed by forming a bulk-type polyurethane and cutting it into individual fabrics, but by applying polyurethane on a substrate (not shown) and peeling it. At this time, a pattern or surface irregularities are formed on the substrate, and a complementary pattern or surface irregularities may be formed on the PU film 4 in the process of the final peeling of the substrate. Therefore, it is preferable that the PU film 4 is formed of a thermosetting polyurethane.

Since these PU films 4 are additionally coated on the gripping surface 2, various patterns are transferred and textures are further reduced by further reducing the hydrolysis of the gripping surface or the occurrence of cracks over time, thereby forming various textures. Can stand out.

Meanwhile, the cosmetic puff according to the present embodiment further includes a handle 5. At this time, the handle may be formed of an ester TPU made of the same material as the gripping surface (2). The handle 5 may be heat-sealed to the end of the PU film 4, which is formed by adhering the PU film 4 to the gripping surface 2 described above and heat-sealing the end portion simultaneously with the use surface 1 Can be.

At this time, it is preferable that the handle 5 is heat-sealed only to the PU film 4 in order to avoid the side effect that the use surface 1 having a relatively low hardness is hardened by deterioration. At this time, it was confirmed that the handle 5 has a very strong adhesive force when the gripping surface 2 is formed of the same material.

As described above, in the present specification and drawings, preferred embodiments of the present invention have been disclosed, and although specific terms are used, they are merely used in a general sense to easily describe the technical contents of the present invention and to help understand the invention. , It is not intended to limit the scope of the present invention. It is apparent to those skilled in the art to which the present invention pertains that other modified examples based on the technical idea of the present invention can be implemented in addition to the embodiments disclosed herein.

1: Use side
2: When it breaks
3: cushion foam
4: PU film
5: handle

Claims (5)

In the cosmetic puff,
A use surface formed of polyurethane;
Gripping paper formed of thermoplastic polyurethane (TPU);
PU film adhesively formed on the gripping surface;
A cushion foam filled between the use surface and the ground surface;
Including,
The edges of the use surface and the gripping surface are joined by heat fusion to each other,
The use surface and the gripping surface are joined by cushion foam and heat fusion, respectively.
Micropores are formed on the use surface,
The gripping surface has a thickness of 100 to 300 μm, a density of 1.15 to 1.25 g/cm 3, and a hardness of 86 to 90 Shore A,
The cosmetic puff further comprises a handle, the handle is a cosmetic puff, characterized in that both ends are heat-sealed to the PU film.
According to claim 1,
The use surface is a cosmetic puff, characterized in that formed of a ruby cell or non-latex-based polyurethane.
According to claim 1,
The cosmetic puff is a cosmetic puff characterized in that it is formed by preheating the gripping surface at 130 to 145 degrees for 25 to 30 seconds, and preheating the used surface for 25 to 30 seconds at 160 to 175 degrees, and then mutually heat-sealing.
According to claim 1,
The handle is a cosmetic puff, characterized in that attached to the end of the PU film in the form of a line adhesive.
According to claim 1,
The PU film is a cosmetic puff characterized in that the pattern is transferred by applying a PU mixture to the substrate on which the pattern is formed and then peeling the substrate.

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