JPH0824041A - Puff for liquid foundation - Google Patents

Abstract

PURPOSE:To obviate penetration of foundation into puff by combining a puff base body consisting of high-expansion sponge of a specific expansion magnification and a front surface layer of low-expansion sponge having specific characteristics. CONSTITUTION:The front layer which consists of the low-expansion open cell type latex sponge having the expansion magnification of 1.5 to 3.5 times and density of 0.15 to 0.50g/cm<3> and has a thickness of 0.5 to 2.5mm is integrally laminated on the front surface of the puff base body consisting of the high-expansion open cell type latex sponge but having the expansion magnification of 5 to 8 times. The raw material of the low-expansion sponge is supplied to the front surface of continuously supplied release paper 3 and is passed through first roller coaters 4a set at such a gap at which the thickness of the low expansion sponge attains 1.0mm. The raw material is then solidified by a first solidifying zone 5a. The raw material 2b of the high- expansion sponge is thereafter supplied to the solidified source and is passed through second roller coaters 4b set at such a gap at which the thickness of the sponge attains 9mm. The raw material is then solidified in a second solidifying zone 5b. The laminate solidified and integrated with the raw materials for the low-expansion and high- expansion sponge is thus obtd.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-foam open-cell latex sponge (hereinafter, low-foam sponge) on the surface of a puff substrate made of high-foam continuous-foam latex sponge (hereinafter also referred to as high-foam sponge). The puff for a liquid foundation in which the layers are integrally laminated. The puff of the present invention has excellent flexibility, good skin contact and the like, excellent cosmetic properties, no permeation of the liquid foundation into the puff, and the base and the surface layer are firmly integrated. , Does not peel off.

[0002]

2. Description of the Related Art Liquid foundation is easy to apply because it does not have makeup marks on makeup and stretches well.
It is now widespread. However, since this liquid foundation has a high water content of 40 to 60%, it is said that the foundation permeates into the inside of the puff which is widely used as a cosmetic puff and which is composed of an open-cell sponge using latex. There is a problem.

As a puff intended to solve the above problems, a surface of an open-cell type sponge has a thickness of about 100 μm.
m urethane film heat-bonded, and latex film laminated and integrated in the same manner.
No. 83312, etc.), an impermeable film layer having closed cells is formed on the surface (Japanese Patent Laid-Open No. 63-277).
No. 006, Japanese Patent Laid-Open No. 4-62721) and the like are known. Furthermore, foam rubber is attached to the surface of the open-cell type sponge with an adhesive (Actually, Shokai 64
-55812, Japanese Utility Model Laid-Open No. 62-82511)
Etc. are also known.

[0004]

However, in a puff in which a urethane film, a latex film, or a self-permeable impermeable film is laminated on the surface of the above-mentioned open-cell type sponge, the foundation does not penetrate into the puff. There is no, and it is excellent in flexibility and feels good against the skin,
The foundation is slippery on the skin at the time of makeup, so that it has a drawback that it is inferior in cosmetic properties such as a streak of coating and no blurring of makeup. Also, in the case where foam rubber is adhered with an adhesive, the adhesive layer prevents the foundation from penetrating into the puff, but since the adhesive layer is hard, the feel is bad and there is a feeling of strangeness when applied to the skin.
Further, the exposed adhesive layer on the side surface of the puff may damage the skin.

The present invention solves the above-mentioned problems and is suitable for a liquid foundation which is excellent in flexibility, has a good skin contact, is excellent in cosmetic properties, and has no foundation permeating into the puff. The purpose is to provide a simple makeup puff.

[0006]

The puff for liquid foundation of the first invention has a foaming ratio of 1.5 to 3.5 on the surface of a puff substrate made of a highly foamed open-cell latex sponge having a foaming ratio of 5 to 8 times. And the density is 0.15 to 0.
It is characterized in that it is made of a low-foam open-cell latex sponge of 50 g / cm ³ and has a surface layer having a thickness of 0.5 to 2.5 mm integrally laminated. The second invention is a puff that specifies the expansion ratio of a low-foam sponge, and has a temperature of 25 ° C.
Is particularly suitable for a liquid foundation having a viscosity of 400 to 600 centipoise.
The invention is a puff in which the expansion ratio is specified as described above.
It is characterized in that it is particularly suitable for a liquid foundation having a viscosity of 800 to 1200 centipoise at 5 ° C.

When the expansion ratio of the above "highly foamed sponge" is less than 5 times, the "puff base" becomes too hard and the skin contact is deteriorated. When it exceeds 8 times, it is introduced into the emulsion for sponge formation. The air is poorly dispersed and a uniform sponge cannot be obtained. If the expansion ratio of the "low-foam sponge" is less than 1.5 times, the puff easily slips on the skin and causes scratches on the coating layer, and if it exceeds 3.5 times, the foundation is insufficient. Penetrates into the puff.
Further, even if the expansion ratio of the low-foam sponge is within the above-specified range, if the density is less than 0.15 g / cm ³ , the penetration of the foundation occurs and 0.50 g / c
If it exceeds m ³ , the sponge becomes hard and the puff slips. In addition, if the thickness of the low-foam sponge layer is less than 0.5 mm, the penetration of the foundation is not sufficiently prevented,
If it exceeds 2.5 mm, the puff becomes stiff and the touch becomes poor.

The high-foam sponge and the low-foam sponge are produced by using a latex emulsion in which a vulcanizing agent, a surfactant, a thickening agent, a gelling agent and the like are blended in addition to rubber latex as a main raw material. . Regarding the expansion ratio and density of the high-expansion and low-expansion sponges, an appropriate amount of air according to the expansion ratio of each is introduced into the emulsion while considering the components of the emulsion and the mixing ratio thereof, and the mixture is stirred at an appropriate mixing speed. It can be adjusted by

The rubber latex is, for example, NBR.
Examples of the latex include (acrylonitrile-butadiene rubber), SBR (styrene-butadiene rubber), chloroprene rubber, butyl rubber, polybutadiene and polyisoprene. Among these, NBR latex is preferable because it is excellent in weather resistance, oil resistance, hygiene (mainly the effect of suppressing the generation of microorganisms) and the like.

Examples of the surfactant include potassium oleate, sodium dodecyl sulfate, dodecyltrimethylammonium chloride, polyoxyethylene alkyl ether, N-alkyl-N, N'-dimethylammonium betaine and the like. The amount of these surfactants added is preferably 0.30 to 0.50 parts, relative to 100 parts by weight of the solid content in the emulsion (hereinafter referred to as "parts"),
Within this range, the emulsion becomes uniform, and the introduced air is dispersed as fine bubbles, and bubbles having a diameter large enough to reduce the touch and the like are not generated.

Examples of the thickener include sodium alginate, sodium polyacrylate, ammonium polyacrylate, polyvinyl alcohol and the like. Further, the addition amount of this thickener is preferably 0.01 to 0.10 part with respect to 100 parts of the solid content in the emulsion. If the addition amount is less than 0.01 part, the thickening effect is not sufficient. However, it becomes difficult to stabilize the bubbles in the emulsion and prevent the bubbles from collapsing. On the other hand, if the amount added exceeds 0.1 parts, the thickening effect becomes excessive, and uniform fine bubbles are unlikely to occur even if air is introduced and stirred.

Examples of the gelling agent include sodium silicofluoride, potassium silicofluoride and the like. These gelling agents are 3 to 100 parts of solid content in the emulsion.
About 5 parts may be added. The latex emulsion containing the above components is preferably adjusted to have a pH in the range of about 11.7 to 12.0. By adding an acidic gelling agent having a pH of 5 to 6 to the emulsion adjusted to be alkaline in this way, the pH of the emulsion is rapidly lowered and a large gelling effect is obtained (prone to solidification),
Can be gelled as fine bubbles during foaming. On the other hand, when the pH of the emulsion is low, the gelling effect becomes insufficient, and a plurality of bubbles form a large bubble before gelation.
The method of adjusting the pH is not particularly limited, and for example,
Examples include a method of adding a predetermined amount of an aqueous solution of potassium hydroxide, sodium hydroxide or the like.

[0013]

In the production of the high-foaming and low-foaming sponge of the present invention, a surfactant, a thickener and a gelling agent are added, and the emulsion is brought to a predetermined pH,
Since the air introduced while stirring the emulsion is well dispersed, the viscosity is increased, and the gelation rate is accelerated, gelation occurs before fine bubbles grow into large bubbles. Therefore, the growth of bubbles or the formation of continuous bubbles can be appropriately suppressed,
The fine bubbles are gelled to form stable bubbles, and the bubbles do not collapse during the subsequent steps or when the puff is used.

On the surface of a puffed substrate made of solidified high-foam sponge, essentially the same quality of low-foam sponge raw material is supplied, although the mixing ratio and the amount of introduced air are different, and then this integrated lamination is performed. By heating and vulcanizing the body, the two layers are firmly joined together, and the two layers are not separated from each other, and because they are made of the same kind of material, there is no discomfort at the interface between the two layers. Further, the puff substrate of the present invention can be continuously manufactured, and further, the labor of the bonding work is not required, and the desired puff can be easily obtained by cutting out from the puff substrate into a desired puff shape or punching. be able to.

[0015]

The present invention will be described below in detail with reference to examples. (1) Preparation of Latex Emulsion The following components were mixed at a predetermined mixing ratio to prepare a latex emulsion. A predetermined amount of a 10 wt% aqueous solution of potassium hydroxide was added to this mixture to adjust the pH to 12. The obtained emulsion had a specific gravity of 1.2 and a synthetic rubber content of 65% by weight. Thereafter, a Kenmix mixer (rotating whisk, manufactured by Aikosha Seisakusho Co., Ltd.) was used so that each emulsion had the expansion ratio shown in Table 1 below.
Thus, the mixture was stirred at a mixing speed of 180 rpm to obtain an emulsion containing many fine bubbles. In addition, the numerical value showing the compounding amount of each component below is a value obtained by converting each component into a solid content.

(2) Components of latex emulsion and blending amount thereof (a) "NBR-531-B" (high-acrylonitrile aqueous emulsion, manufactured by Zeon Corporation); 60 parts (b) "NBR 531" [acrylonitrile butadiene Aqueous emulsion of acrylonitrile product (acrylonitrile content 25%) in rubber, concentration: 65%, manufactured by Nippon Zeon Co., Ltd.]; 40 parts (c) "powdered sulfur" (Hosoi Chemical Co., Ltd.); 1.4 parts (d) Zinc salt of mercaptobenzothiazole (trade name "NOXCELLER MZ", manufactured by Ouchi Shinko Chemical Co., Ltd.) as "accelerator"; 2.0 parts (e) "Zinc oxide" (manufactured by Shiramizu Chemical Industry Co., Ltd.) 3.0
Part (f) "Anti-aging agent" (the above 2,2-methylene-bis-4
-Methyl-6-tert-butylphenol); 2.
0 part (g) Potassium oleate as potassium oleate soap (manufactured by Kao Corporation); 0.37 part (h) Reaction product of chlorinated formaldehyde and ammonia (trade name "Trimenbase", Uniroyal Corporation) Manufactured); 1.0 part (i) "sodium alginate" (first-grade reagent) [3.3% aqueous solution]; 0.03 part (j) "sodium fluorosilicate" (manufactured by Mitsui Toatsu Chemicals, Inc.); 4 .0 copy

(3) Manufacture of puff for liquid foundation The above-mentioned raw material 2a for low-foam sponge having a large number of fine bubbles.
As shown in FIG. 1, the first roller coater 4 is continuously supplied to one surface of the release paper 3 and is set at intervals such that the low-foam sponge has a thickness of 1.0 mm.
a, and is solidified by the first solidification zone 5a. After that, the high foam sponge raw material 2b is supplied to the surface of the solidified low foam sponge raw material, and the high foam sponge raw material 2b is passed through a second roller coater 4b set at an interval such that the thickness of the high foam sponge is 9 mm. 2 solidification zone 5b
The low-foam and high-foam sponge raw materials were solidified to obtain an integrated laminate. A doctor knife or a bar coater may be used instead of the roller coater.

Next, the laminate is continuously transferred to
It is introduced into the heating vulcanization tank 6, vulcanized for 20 minutes while flowing heated air at 120 ° C. from above and below, and immediately after leaving the heating vulcanization tank 6, the release paper 3 is peeled off and wound up, and is made of a low foam sponge The puff base material 1 in which the surface layer 1a and the puff base body 1b made of high-foam sponge were firmly and integrally joined together was manufactured. Then, as shown in FIG. 2, the upper and lower surfaces are sliced and removed using a cross-section slicer 7, and further cut with a Thomson blade so as to have a required size, and then the side surfaces thereof are ground with a rotary grindstone. Then, a puff having a thickness of 60 mmφ × 9 mm was obtained. In addition, the cross section of the puff obtained as described above,
Observation with an optical microscope at 100 times magnification confirmed that both the low-foam sponge and the high-foam sponge had an open-cell structure.

Although the puff base material is obtained by a continuous method in the above embodiment, the puff base material can be produced by a batch method in the present invention, and the puff base material is made of a metal such as aluminum and has an appropriate size. After pouring the low foam sponge emulsion into the molding container of No. 1 and solidifying at room temperature, further pouring the high foam sponge emulsion on its surface to solidify, and then at 120 ° C. for 40 minutes or under other suitable conditions. Then, the puff of the required size is obtained by an appropriate method such as vulcanization with, followed by cutting out from the puff base material taken out of the container and punching, and if necessary, finishing the side surface by polishing or the like to obtain a product.

(4) Performance Evaluation of Obtained Puff The performance of the puff obtained as described above was evaluated for each of the following items by the following method. The results are shown in Table 1. In Table 1, Comparative Experimental Example 4 is one in which the entire puff is composed of a high-foam sponge, and each of the other examples is a low-foam sponge formed on the surface of the puff base made of the high-expandable sponge of Comparative Experimental Example 4. It is a stack of layers.

Density: A value obtained by measuring the weight of a fixed volume of emulsion or sponge and dividing the weight by the volume. Foaming ratio: Specific gravity of the emulsion used [1.2 (calculated as the density value)], the amount of synthetic rubber in it (65% by weight), and the density of the sponge produced (weight is the amount in the emulsion) The volume of a sponge obtained from a fixed volume of emulsion is calculated, and the volume is divided by the volume of the emulsion. Permeability of foundation into puff: About 1 g of foundation was applied to the low-foam sponge surface of the puff (excluding Comparative Experimental Example 4), and after about 1 minute, it was cut in the radial direction to check the state of permeation from the surface. Visually observe.

Hardness: The stress when the puff is compressed by 25% in the thickness direction is read and expressed as it is in g. Feeling: By finger touch. ◯ means that the puff base material and the surface layer have a slightly hard feel, and ◎ means that they are soft and have a good feel. Cosmeticity (whether or not makeup scars and makeup blurring): The above-mentioned foundation is applied to the low-foam sponge surface of the puff (excluding Comparative Experimental Example 4), and the makeup is actually applied to the face for judgment.

Frictional resistance: The above foundation was applied on a stainless steel plate, a puff was placed thereon with the low foam sponge surface in contact with the foundation, and a load plate weighing 200 g was placed on the upper surface of the puff. When the puff is pulled in a direction parallel to the stainless steel plate, the force at which the puff starts moving is read. Makeup slippage: The above foam is applied to the low-foam sponge surface of the puff (excluding Comparative Experimental Example 4), and the face is actually put on for judgment. The viscosity of the liquid foundation was measured by VISCOMETER (manufactured by TOKIMEC).

[0024]

[Table 1]

According to the results shown in Table 1, the viscosity is 500 cps.
In the case of a relatively low foundation, the puff of Experimental Example 1 having a foaming ratio of 2 has a slightly hard feeling, but other properties are good, and it is understood that the puff is suitable for a liquid foundation. On the other hand, in Comparative Experimental Example 1, although there are no problems such as hardness, cosmetic properties and slippage, the permeability of the most important foundation into the puff is poor and it cannot be used as a puff for a liquid foundation.

On the other hand, in the case of a foundation having a relatively high viscosity of 1000 cps, Experimental Example 2 with an expansion ratio of 2.6 times
In the puff, the frictional resistance is slightly high, but it is not a problem, and it is found that it is excellent in all other properties. On the other hand, in Comparative Experimental Example 2 in which the expansion ratio is 2 times,
The puff was slightly stiff, and was slightly inferior in cosmetic properties and slippage. In Comparative Experimental Example 3 with a foaming ratio of 4 times, there was no problem in softness and cosmetic properties and slippage, but there was foundation penetration, and Comparative Example 4 It can be seen that the puff made of only the high-foam sponge further penetrates the foundation and cannot be used as a puff for liquid foundation.

The present invention is not limited to the specific examples described above, but various modifications may be made within the scope of the present invention depending on the purpose and application. For example, the low-foam sponge does not necessarily have to have only a specific homogeneous open-cell structure, and as shown in Table 2 (the measuring method of each property is the same as in Table 1), contains a specific proportion of the closed-cell portion. An open-cell sponge may be used, and as a sponge in which the foaming ratio, density, etc. of the entire open-cell foam, the single-cell mixed sponge are appropriately adjusted, and this is used instead of the low-foam sponge of Experimental Example 1, The drawbacks of the closed-cell sponge and the open-cell sponge are complemented with each other, and although there are some problems in the permeability and slippage of the foundation, a product that is considerably superior to the conventional puff can be obtained.

[0028]

[Table 2]

[0029]

The puff for liquid foundation of the first invention is a combination of a puff base made of a high-foam sponge and a low-foam sponge layer constituting the surface layer. The impermeability of the foamed sponge is balanced and the skin feels good, and even the liquid foundation does not penetrate into the puff. In addition, it is a puff that is generally excellent in cosmetic properties in terms of the occurrence of cosmetic streaks, the presence or absence of makeup blurring, and the presence or absence of makeup slippage. Furthermore, as in the second invention and the third invention, by using a specific low-foam sponge according to the viscosity of the foundation, it is possible to obtain a puff having excellent cosmetic properties in use of the foundation in a wide viscosity range. You can

[Brief description of drawings]

FIG. 1 is an explanatory diagram for continuously manufacturing a puff base material in an experimental example.

FIG. 2 is an explanatory diagram showing a state in which the upper and lower surfaces of a puffing base material are sliced and cut in an experimental example.

[Explanation of symbols]

1; puff base material, 1a; surface layer made of low-foam sponge, 1
b; a puff base made of high-foam sponge, 2a; low-foam sponge raw material, 2b; high-foam sponge raw material, 3; release paper, 4a; first roller coater, 4b; second roller coater, 5a; first Solidification zone, 5b; second solidification zone, 6; heating vulcanization tank, 7; cross-section slicer.

Claims (3)

[Claims] 1. A puff substrate surface made of a high-foaming open-cell latex sponge having an expansion ratio of 5 to 8 times and a expansion ratio of 1.5 to 3.5 times and a density of 0.15 to 0.50 g /
A puff for liquid foundation, which is made of a low-foam open-cell latex sponge of cm ³ and has a surface layer having a thickness of 0.5 to 2.5 mm integrally laminated. 2. A liquid foundation for use 2
The puff for liquid foundation according to claim 1, wherein the viscosity at 5 ° C. is 400 to 600 centipoise, and the expansion ratio of the low-foam open-cell latex sponge is 1.5 to 2.5. 3. A liquid foundation for use 2
The puff for liquid foundation according to claim 1, wherein the low-foam open-cell latex sponge has a foaming ratio of 2.1 to 3.1 and a viscosity at 5 ° C. of 800 to 1200 centipoise.