JP2006314422A - Cosmetic powder-puff - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cosmetic powder-puff which is formed in a puff shape by polishing a surface of a foam, which hardly causes the adhesion of abrasive powder and dust due to static electricity by suppressing the static electricity generated by friction during the polishing and transpotation of the foam, and which facilitates the removal of the abrasive powder and the dust. <P>SOLUTION: In this cosmetic powder-puff composed of the foam with the polished surface, the surface resistivity of the foam is decreased by adding an antistatic agent to the foam, so that the static electricity can be hardly generated during the polishing, transportation, etc. This suppresses the adhesion of the abrasive powder and the dust, and facilitates the removal of the abrasive powder and the dust by weakening an attractive force acting on the abrasive powder and the dust due to the static electricity even in the case of the adhesion of the abrasive powder and the dust. Preferably, the surface resistivity is set to be in the range of 10<SP>7</SP>-10<SP>15</SP>MΩ, in terms of the anti-adhesion effect of the abrasive powder and the easiness of the removal of the abrasive powder adhering to the puff. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cosmetic puff made of a foam having a polished surface.

  Conventionally, a cosmetic puff (applicator for a cosmetic foundation) is used in which a foam is punched into a block shape of a required size and then polished into a puff shape with a grindstone or the like. Further, since the polishing powder generated during the polishing process adheres to the cosmetic puff, the powder removing operation is performed after the polishing process.

  However, it is difficult to sufficiently remove the abrasive powder from the cosmetic puff even by the powder removing operation, and there is a problem that the commercial value of the cosmetic puff is lowered by the abrasive powder that could not be removed. Furthermore, dust may adhere during the transportation of the cosmetic puff, and in that case the commercial value is also reduced.

  As a cause of the abrasive powder adhering during the polishing or transportation, and a cause of difficulty in removing the abrasive powder adhering to the cosmetic puff, static electricity of the foam can be considered. The static electricity is generated and stored in the foam by friction between the foam and the blade during polishing or friction during transportation of the cosmetic puff.

JP-A-6-7220 JP 2002-146181 A

  The present invention has been made in view of the above points, and an object of the present invention is to provide a cosmetic puff in which polishing powder and dust are difficult to adhere and the polishing powder and dust can be easily removed.

  The invention of claim 1 is a cosmetic puff made of a foam whose surface is polished, wherein an antistatic agent is added to the foam.

The invention of claim 2 is characterized in that the surface resistivity is 10 ⁷ to 10 ¹⁵ MΩ in claim 1.

According to the cosmetic puff of the present invention, since the antistatic agent is added to the foam, static electricity is hardly generated due to friction and the like, and adhesion of polishing powder and dust can be suppressed. Even if abrasive powder or dust adheres, it can be easily removed. Furthermore, by setting the surface resistivity of the cosmetic puff to 10 ⁷ to 10 ¹⁵ MΩ, it is possible to efficiently suppress the generation of static electricity and make it difficult to attach polishing powder and dust.

  Hereinafter, embodiments of the present invention will be described in detail. The cosmetic puff of the present invention comprises a foam that has been puffed by polishing the surface, and an antistatic agent is added to the foam.

  The foam is not particularly limited, and a known puff foam can be used. For example, rubber sponge, polyurethane foam, olefin resin foam and the like can be mentioned. In particular, the olefin resin foam is preferable as the foam of the cosmetic puff of the present invention from the viewpoint of touch, weather resistance, discoloration resistance and the like. Further, among the olefin resin foams, those containing styrene-ethylene-butylene-styrene block copolymer (SEBS) and ethylene-vinyl acetate copolymer (EVA) as the olefin resin are preferable. By including SEBS and EVA, the flexibility and feel of the foam are improved as a cosmetic puff.

  The case where the foam is an olefin resin foam will be described below. The olefin resin foam is made by foaming a kneaded material containing at least a crosslinking agent, a foaming agent and a filler in addition to the olefin resin (for example, SEBS and EVA) and further containing other appropriate auxiliary agents. .

  As a crosslinking agent, the well-known thing conventionally used for the olefin resin foam is used. Examples thereof include organic peroxides such as dicumyl peroxide, 2,5-dimethyl-2,5-bis-tertiary butyl peroxyhexane, 1,3-bis-tertiary peroxy-isopropylbenzene, and the like. . The amount of the crosslinking agent is usually 3 to 7 parts by weight with respect to 100 parts by weight of the olefin resin.

  As a foaming agent, what decomposes | disassembles by heating and generate | occur | produces gas is used, and it does not restrict | limit in particular. For example, azodicarbonamide, 2,2'-azobisisobutyronitrile, diazoaminobenzene, benzenesulfonyl hydrazide, benzene-1,3-sulfonyl hydrazide, diphenyl oxide-4,4'-disulfonyl hydrazide, 4,4 ' -Oxybisbenzenesulfonyl hydrazide, paratoluenesulfonyl hydrazide, N, N'-dinitrosopentamethylenetetramine, N, N'-dinitroso-N, N'-dimethylphthalamide, terephthalazide, pt-butylbenzazide, One or more of sodium bicarbonate, ammonium bicarbonate and the like are used. In particular, azodicarbonamide and 4,4′-oxybisbenzenesulfonyl hydrazide are preferable. The addition amount is usually 3 to 7 parts by weight with respect to 100 parts by weight of the olefin resin.

  The filler is not particularly limited, and examples thereof include calcium bicarbonate, diatomaceous earth, barium sulfate, iron oxide, alumina (aluminum oxide), aluminum hydroxide, and plastic powder. Multiple types can be used in combination. The amount of the filler is an appropriate amount, but is usually adjusted in a range of about 10 to 50 parts by weight with respect to 100 parts by weight of the olefin resin.

  Other auxiliary agents added as appropriate include foaming auxiliary agents. Examples of the foaming aid may include metal oxides such as zinc oxide and lead oxide, lower or higher fatty acids or their metal salts, urea and derivatives thereof, and these may be used singly or in combination. it can.

  The antistatic agent added to the foam is not particularly limited, and examples thereof include poly (oxyethylene) alkylamine, poly (oxyethylene) alkylamide, poly (oxyethylene) alkyl ether, and poly (oxyethylene). ) Nonionic antistatic agents such as alkyl phenyl ethers, glycerin fatty acid esters and sorbitan fatty acid esters; anionic antistatic agents such as alkyl sulfonates, alkylbenzene sulfonates, alkyl sulfates and alkyl phosphates; quaternary ammonium chlorides and quaternary ammoniums Cationic antistatic agents such as sulfates and quaternary ammonium nitrates; Amphoteric antistatic agents such as alkylbetaine compounds, alkylimidazoline compounds and alkylalanine compounds; Jill type cationic compounds, polyacrylic acid type cation compound can be exemplified such as a conductive resin antistatic agent such as may be used which are combined at best, or more used alone.

The amount of the antistatic agent added is adjusted so that the surface resistance of the cosmetic puff is 10 ⁷ to 10 ¹⁵ MΩ, preferably 10 ⁷ to 10 ¹² MΩ, and the appropriate amount varies depending on the type of the antistatic agent used. Usually, it is determined in the range of 0.5 to 5 parts by weight, preferably 1 to 3 parts by weight with respect to 100 parts by weight of the foam resin (for example, olefin resin).

  The cosmetic puff is formed by foaming a foaming agent raw material to which the antistatic agent has been added by a known foaming procedure, and then forming the foam into a block of a required size by cutting or the like. It can be obtained by polishing the surface of the foam with a polishing apparatus to form a puff. As a polishing apparatus for efficiently polishing into such a puff shape, the one shown in Japanese Patent Publication No. 50-12636 can be used.

A specific example of a cosmetic puff in which an antistatic agent is added to an olefin resin foam containing SEBS and EVA will be described.
SEBS (Asahi Kasei Co., Ltd., trade name: Tuftec (registered trademark) H1221) and EVA (Tosoh Corporation, trade name: Ultrasen 640) as olefin resins, and azodicarbonamide (manufactured by Eiwa Kasei Kogyo Co., Ltd., products) as blowing agents Name: VINYHOLE AC # 3), calcium bicarbonate as filler, two types of zinc oxide as foaming aid 1, zinc stearate as foaming aid 2, urea as foaming aid 3 (trade name, manufactured by Eiwa Kasei Kogyo Co., Ltd.) : Cell paste 101), Dialkyl peroxide (Chemicals Akzo Co., Ltd., trade name: Kayahexa AD) as a crosslinking agent, Nonionic antistatic agent (Kao Corporation, trade name: Electro Stripper TS-3B) as an antistatic agent Was blended in the amount shown in Table 1 and kneaded with a 1 L kneader about 850 g in weight, then 1 Was kneaded product was kneaded in inches mixing roll.

  The kneaded product was filled in a 30 mm × 155 mm × 155 mm mold at 140 ° C., sealed, heated in a pressurized state for 40 minutes, and then depressurized to obtain a foam. Next, the foam was punched into a thickness of 8 mm and a diameter of 80 mm, and the outer periphery of the foam after punching was chamfered with a polishing device to obtain a predetermined puff shape, thereby obtaining cosmetic puffs of Examples 1 to 3. . In addition, 100 cosmetic puffs of Examples 1 to 3 were manufactured, and it was visually determined whether or not the abrasive powder was attached to the surface of the cosmetic puff. On the other hand, when the abrasive powder was found, the abrasive powder was attached. Table 1 shows the abrasive powder adhesion rate, which is the percentage of the number of the abrasive powders adhered out of 100. Further, the surface resistivity (conforming to JIS K 6911: 1995) of the cosmetic puff was measured with a hyper insulation meter SM-8220 (Toa DKK Corporation). The measured values of the surface resistivity are as shown in Table 1. For comparison, a cosmetic puff of a comparative example was manufactured by cutting and polishing the foam from which the antistatic agent was not added in the same manner as in the example. For the cosmetic puff of the comparative example, the abrasive powder adhesion rate and the surface resistivity were also measured. The measurement results are shown in Table 1.

As is apparent from the results of the adhesion rate of the abrasive powder in Table 1, Example 1 and olefin in which the addition amount of the antistatic agent is 1 part by weight and the surface resistivity is 7.4 × 10 ⁸ MΩ with respect to 100 parts by weight of the olefin resin. In Example 2 in which the addition amount of the antistatic agent relative to 100 parts by weight of the system resin was 3 parts by weight and the surface resistivity was 6.2 × 10 ⁷ MΩ, the abrasive powder adhesion rate was 0%. Further, in Example 3 in which the amount of the antistatic agent added relative to 100 parts by weight of the olefin resin was 0.5 parts by weight and the surface resistivity was 2.5 × 10 ¹⁰ MΩ, the abrasive powder adhesion rate was 20%. . However, as compared with the adhesion rate of 50% in Comparative Example 1 in which no antistatic agent was added, Example 3 clearly shows that the abrasive powder does not easily adhere. From this, it can be easily understood that the abrasive powder can be made difficult to adhere by adding an antistatic agent to the foam of the cosmetic puff.

Claims (2)

  A cosmetic puff comprising a foam having a polished surface, wherein an antistatic agent is added to the foam. A cosmetic puff having a surface resistivity of 10 ⁷ to 10 ¹⁵ MΩ.