KR20200085091A - 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 ether-based thermoplastic urethane (TPU) to provide a smooth surface appearance while preventing discoloration and cracking, and bond the grip surface and a use surface by hot melting to secure a sufficient strength to prevent the grip surface and the use surface from being separated from each other. 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 ether-based TPU; 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 TPU has a thickness of 100 to 300 μm, a density of 1.14 to 1.20 g/cm^3, a hardness of 87 to 89 Shore A or of 91 to 92 Shore A, a tensile strength of 70 to 90 Mpa, a tearing strength of 650 to 850 N/cm, and an elongation rate of 720 to 1,040%.

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 document 1) discloses a technique for forming a gripping surface with thermoplastic polyurethane (TPU) to reduce hydrolysis.

However, in the prior art document 1, the elongation and the tensile strength of the TPU are very low, and even when hydrolysis and destruction by cosmetics are prevented, a problem occurs in that the phenomenon of separating the gripping surface from the use surface frequently occurs. In addition, in the prior art document 1, there is no perception of thickness, but it is impossible to increase the thickness of the puff indefinitely to increase the elongation and tensile strength.

Meanwhile, a handle for gripping is generally attached to the gripping surface of a cosmetic puff. In the prior art of Korean Patent Registration No. 10-1232576 (prior art document 2), as a conventional method of forming a handle on a cosmetic puff, a band is attached to the puff and then sewn using equipment such as a sewing machine. After the puff was matched, it was a common method to apply heat to perform thermoforming.

However, in the conventional method of attaching the handle, the equipment such as a sewing machine must be separately provided, and when the lock is sewn by a sewing machine or the like, the quality of the sewn portion is deteriorated due to the void of the sponge-type puff, and the handle is puffed There is a problem of easily falling from the product, resulting in defects and inconvenience in use.

Prior art document 2 discloses a method of attaching a separate double-sided adhesive layer to the end of the handle and adhering it to the gripping surface, however, a problem of cost increase caused by the addition of the process and the adhesive strength of the adhesive layer is also used so that the handle portion does not deviate. There was a problem that could not be implemented.

[Advanced technical literature]

1. Published Patent No. 10-2017-0125661

2. Korean Registered Patent No. 10-1232576

The present invention is to solve the above-mentioned problems of the prior art, the object of the present invention is to secure the durability of the gripping surface, while the tensile strength and tear strength is notably increased so that the use does not separate the gripping surface and the use surface Provide cosmetic puff.

In addition, the present invention provides a cosmetic puff having a gripping handle formed of the same TPU to significantly improve the adhesive strength with the gripping surface.

The cosmetic puff according to an aspect of the present invention includes a use surface formed of polyurethane, a gripping surface formed of an ether-based thermoplastic polyurethane (TPU), and a cushion foam filled between the use surface and the gripping surface, and using surface And the edge areas of the gripping surfaces are joined 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, and the TPU has a thickness of 100 to 300 Μm, density of 1.14 to 1.20 g/cm3, hardness of 87 to 89 Shore A or 91 to 92 Shore A, tensile strength of 70 to 90 Mpa, tear strength of 650 to 850 N/cm, elongation of 720 to 1040% do.

At this time, the cosmetic puff further includes a handle, the handle is formed of the same material as the gripping surface may be heat-sealed to the gripping surface.

In addition, 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 formed in the form of a line adhesive to the gripping surface and the end.

In addition, the handle can be manufactured by heat-sealing at the same time when heat-sealing the use surface and the gripping surface.

The present invention consists of an ether-based TPU of the gripping surface itself to prevent discoloration and cracking, while forming a smooth surface appearance, and further secures sufficient strength so as not to be separated from each other according to the heat-sealing adhesion between the gripping surface and the using surface.

In addition, the present invention is to form a gripping handle with the same TPU as the gripping surface to significantly improve the adhesive strength even when pre-attaching to the end of the gripping surface, so that the grip does not fall.

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

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 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a cross section of the area A-A' of FIG. 1 for understanding.

Referring to the drawings, the cosmetic puff 10 in one embodiment of the present invention comprises a use surface (1), a gripping surface (2) and a cushion foam (3), the handle (4) as shown It may further include. 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 thermoplastic polyurethane (TPU). In more detail, the TPU of the gripping paper 2 according to an embodiment of the present invention is formed of an ether-based TPU.

At this time, the TPU has a density of 1.14 to 1.20 g/cm3, and a hardness of 87 to 89 Shore A or 91 to 92 Shore A, resulting in a tensile strength of 70 to 90 Mpa, a tear strength of 650 to 850 N/cm, and an elongation of 720 to 1040%. The thickness at this time is preferably formed of 100 to 300㎛ for usability. On the other hand, since the elongation tends to decrease when the hardness is 90, the hardness range near 90 Shore A is excluded.

Experimental Example 1 : Tear strength

The tearing strength was measured according to ASTM D1004 standard by setting the thickness of the gripping surface to 120 µm and varying the density of TPU having a hardness of 88 Shore A.

Comparative Example 1 Comparative Example 2 Comparative Example 3 Example 1 Example 2 density 1.00 1.05 1.10 1.15 1.20 Tear strength
(N/cm) 290 320 340 873 936

In Comparative Examples 1, 2, and 3, the tear strength was very weakly distributed, and in the case of Examples, it can be seen that the TPU density actually shows a significant improvement in tear strength in the vicinity of 1.15.

Experimental Example 2 : The tensile strength

Tensile strength was measured according to ASTM D792 standard by changing the density of TPU having a hardness of 88 Shore A and setting the thickness of the gripping surface to 120 µm.

Comparative Example 1 Comparative Example 2 Comparative Example 3 Example 1 Example 2 density 1.00 1.05 1.10 1.15 1.20 The tensile strength
(Mpa) 25 31 34 74 80

Significant increase in tensile strength was found in the case of Examples where the density was slightly higher than Comparative Examples 1, 2 and 3. In the case of the embodiment, a high tensile strength was realized despite being an ether-based TPU.

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.

Meanwhile, the cosmetic puff according to the present embodiment further includes a handle 4. The handle is preferably formed of TPU, the same material as the gripping surface 2. The handle is heat-sealed to the end of the gripping surface, and can be heat-sealed at the same time when the above-mentioned use surface 1 and the gripping surface 2 are heat-sealed. At this time, it is preferable that the handle 4 is heat-sealed only to the gripping surface 2 in order to avoid the side effect that the use surface 1 having a relatively low hardness is hardened by deterioration. At this time, when the handle 4 and the gripping surface 2 are formed of the same thermoplastic TPU material, it was confirmed that very strong adhesive force is applied. Moreover, although the end of the handle 4 was adhered in the form of a linear connection with the end of the gripping surface 2, it was found that the strength that does not fall easily was secured.

Experimental Example 3 : Appearance comparison

The thickness of the gripping surface was 120 µm, and the TPU surfaces prepared by varying the density of TPU having a hardness of 88 Shore A were compared. At this time, the texture when rubbing the surface by hand was summarized.

Comparative Example 1 Comparative Example 2 Comparative Example 3 Example 1 Example 2 Comparative Example 4 Comparative Example 5 density 1.00 1.05 1.10 1.15 1.20 1.25 1.30 asperity
satisfaction Satisfaction Satisfaction Satisfaction Satisfaction Satisfaction dissatisfaction dissatisfaction

In Comparative Examples 1, 2, 3 and Examples, the surface was formed smoothly and the user's roughness satisfaction was high. However, in the case of the comparative example, as a result of preparing the ester-based TPU for the increase in density, the satisfaction with the pass was low due to the rather rough surface. As described above, the cosmetic puff according to the present invention uses an ether-based TPU to improve the roughness satisfaction while improving the tensile strength, tear strength and elongation, thereby significantly increasing the durability of the cosmetic puff.

As described above, in the present specification and drawings, preferred embodiments of the present invention have been disclosed, and although specific terms have been used, they are merely used in a general sense to easily describe the technical contents of the present invention and to understand the invention. , It is not intended to limit the scope of the present invention. It is obvious to those skilled in the art to which the present invention pertains that other modifications based on the technical spirit 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: handle

Claims (6)

In the cosmetic puff,
Use surface formed of polyurethane,
Gripping paper formed of an ether-based thermoplastic polyurethane (TPU), and
Includes cushion foam filled between the use surface and the ground surface,
The rim area of the use surface and the gripping surface is joined by heat fusion to each other, and the use surface and the gripping surface are joined by cushioning and heat fusion, respectively.
Micropores are formed on the use surface,
The TPU has a thickness of 100 to 300 μm, a density of 1.14 to 1.20 g/cm 3, a hardness of 87 to 89 Shore A or 91 to 92 Shore A, a tensile strength of 70 to 90 Mpa, a tear strength of 650 to 850 N/cm, Cosmetic puff, characterized in that the elongation is 720 to 1040%.
According to claim 1,
The cosmetic puff further includes a handle, and the handle is formed of the same material as the gripping surface, and the cosmetic puff is characterized in that it is heat-sealed to the gripping surface.
According to claim 2,
The use surface is a cosmetic puff, characterized in that formed of a ruby cell or non-latex-based polyurethane.
According to claim 3,
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 2,
The handle is a cosmetic puff, characterized in that formed in the form of a line adhesive to the grip surface and the end.
The method of claim 5,
The handle is a cosmetic puff, characterized in that it is manufactured by heat-sealing at the same time when heat-sealing the use surface and the gripping surface.

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