JPS62234009A - Forming of solid powdery cosmetic - Google Patents

Abstract

PURPOSE:To obtain a solid powdery cosmetic having excellent mold-releasability and beautifully finished surface appearance, by inserting a releasant-containing press sheet between a press head and a solid powdery cosmetic in the press forming of the cosmetic. CONSTITUTION:A definite amount of a solid powdery cosmetic is put into an intermediate dish fixed to a mounting table and the surface of the cosmetic is covered with a press sheet impregnated or coated with a releasant. A formed solid powdery cosmetic can be produced by pressing the cosmetic with a press head in a state providing the press sheet between the press head and the solid powdery cosmetic. The releasant is selected from an oleophilic surfactant of <=5 HLB (e.g. sorbitan monooleate), a hydrocarbon which is liquid at normal temperature (e.g. liquid paraffin), a volatile silicone (e.g. methylpolysiloxane), an oleophilic surfactant having an HLB of >=10 [e.g. POE(7.5)-nonyl phenyl ether] and a polyhydric alcohol (e.g. glycerol).

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a method for press-molding solid powder cosmetics by moving a press sheet impregnated with a mold release agent between the press head and the solid powder cosmetics. It is placed in between to improve the mold releasability and make the surface finish of the solid powder cosmetic beautiful.

(Prior art) When molding solid foundation silane, etc., the method of pressing is performed while sandwiching a press sheet such as paper or polyethylene between the solid powder cosmetic and the press head. Ta.

(Problems to be Solved by the Invention) When pressing is performed using such a conventional method, solid powder cosmetics often adhere to the press sheet side when the press sheet is peeled off. However, there was a drawback that the surface of the solid powder cosmetic was disturbed and a beautiful finish could not be obtained.

In addition, in the case of solid powder cosmetics with a high oil content, if the solid powder cosmetics are pressed using a press sheet made of paper, the oil content in the solid powder cosmetics will transfer to the paper. There was also the problem that the system would break down.

(Means for Solving the Problems) In order to solve these problems, the present invention applies pressure while coating the surface of the solid powder cosmetic with a press sheet impregnated with or coated with a release agent. This is a method for molding a solid powder cosmetic, which is characterized in that it is molded.

The present invention will be explained in detail below.

After press molding, the reasons why a part of the surface of the solid powder cosmetic adheres to the press sheet are: a. properties of the powder; b.
It is thought that the amount of oil, the nature of the C1 oil, d, the presence of other components, d, press pressure and press time, etc., have an effect. As a result of various studies on these factors, we found that the factors C and d, especially the factor d, greatly influenced adhesion. In other words, it has been found that the properties of the hydrophilic surfactant and oil affect the adhesion to the press sheet. Therefore, for solid powder cosmetics containing a hydrophilic surfactant, a press sheet is impregnated with a compound with properties that conflict with the hydrophilic surfactant as a mold release agent, and the hydrophilic surfactant is The present invention was completed by impregnating a press sheet with a compound having different properties from the oil content of the solid powder cosmetic that does not contain the oil content.

Therefore, the release agent mentioned here can include the following, and is arbitrarily selected depending on the properties of the solid powder cosmetic.

■ Sorevitan monooleate [Anal B 5.0], Sorevitan sesquioleate [1 (LB 4.5)],
Sorevitan fatty acid esters such as sorbitan trioleate [HLB 1.7] or polyethylene glycol fatty acid esters such as POE(2) monooleate) [+1LB 4.5] or glycerin fatty acids such as glyceryl monoisostearate [HLB 4.0] Ester or POE (6) Polyethylene sorbitic acid ester or POE such as sorbitol hexastearate [HLB 3.0] (3) Castor oil [1) L
B 3.0 ] and a lipophilic surfactant with an HLB of 5 or less.

■ Hydrocarbons that are liquid at room temperature, such as liquid paraffin and squalane.

■ Volatile silicones such as methylpolysiloxane and methylhydrodienepolysiloxane.

■ POE (7,5) nonylphenyl ether [ILB
14.01, P OE (10) / Nilufe;
Ruefl [HLB 10.5], POE (10)
Octyl phenyl ether [Anal B 1). Polyoxyethylene alkylphenyl ether or PO such as 5]
E(10) HL B 1 with polyoxyethylene lanolin derivatives such as lanolin alcohol [HLB 15.5]
0 or more hydrophilic surfactant.

■ Polyhydric alcohols such as glycerin, propylene glycol, 1°3-butylene glycol, polyethylene glycol, and cape sorbitol.

The selection and concentration of these mold release agents depend on the presence or absence of hydrophilic surfactants in the solid powder cosmetics and the nature of the oil content in the solid powder cosmetics, but generally they are as follows: used. That is, POE (10
) nonylphenyl ether, POE (10) octylphenyl ether, POE (10) When containing hydrophilic surfactants such as lanolin alcohol, HL such as ■
B A lipophilic surfactant of 10 or less or the above mold release agents such as (1) and (2) can be used in an aqueous or alcohol solution in a range of 5% by weight to 100% by weight.

When the press sheet is made of paper, these mold release agents can be incorporated into the press sheet by means such as spraying or impregnation. In addition, when the press sheet is made of a plastic sheet, it is used by spraying or coating the side that will come into contact with the solid powder cosmetic.

Solid powder cosmetics include foundations, facial powders, creamy cakes, solid white powders, blushers, eye shadows, etc., and contain zinc oxide, titanium dioxide, talc, mica, pearl agents, etc. as powder components, and are liquid as oil components. It contains paraffin, squalane, diisostearyl malate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, etc., and also contains preservatives, fragrances, etc.

The press sheet used in the present invention is a thin film made of a material such as paper, polypropylene, or polyethylene, and has a thickness of 0.5 mm. Ob* to 0.2 fl is used.

(Example) Preferred embodiments of the present invention will be described below.

Example 1) 12 g of the solid foundation shown in Table 1 below containing a hydrophilic surfactant with an r L of 810 or more was dispensed into a medium I and fixed in a pedestal. Next, the surface of the solid foundation was coated with a press sheet made of paper that had been impregnated with 30% solevitan trioleate, a lipophilic surfactant with an HL B of 5 or less, and then dried.
A product was obtained by pressing at a pressure of /-.

Table 1 Kaobake 42.97 Mica-based powder 15.0 Titanium dioxide
10.0 Iron oxide red 1
・O iron oxide yellow 5.0 iron oxide black 0.3 squalane
10.0 Silicon 6.0
Butylene glycol 3.0POE (2)
Mo/l rate 0.5 Trimethylolpropane 2-ethylhexanoate 5.0 Antioxidant 0.03 Preservative
0.7 fragrance
0.5 (Result) A solid foundation with good mold releasability and a beautiful surface could be obtained.

Comparative Example 12 g of the solid foundation shown in Table 1 having the same formulation as in Example 1 was dispensed into a medium plate, and the solid foundation was placed in a pedestal.

Established. Subsequently, pressing was performed in the same manner as in Example 1 using a commercially available paper press sheet (manufactured by Fujimine Shoji Co., Ltd.).

(Results) When the paper press sheet was peeled off, solid foundation powder adhered to the press sheet side, and the foundation surface had a rough and disordered shape.

Example 2 A solid foundation similar to that of Example 1 was spray-dried with a squalane 50% alcohol solution onto a press sheet, and press-molded under the same conditions.

Example 3 The same solid foundation as in Example 3 was press-molded using a press sheet impregnated with 100% polysiloxane.

Example 4 3 g of the eye shadow shown in Table 2 below, which does not contain a hydrophilic surfactant, was dispensed into a medium tray and fixed in a pedestal. Subsequently, PO, which is a hydrophilic surfactant with an HLB of 10 or more,
E(20) A 30% alcohol solution of lanolin alcohol was sprayed and a dried paper press sheet was coated on the surface of the solid foundation and pressed at a pressure of 40 kg/csl to obtain a product.

Table 2 Zinc oxide 20.0 talc
5080 liquid paraffin
5.0 Propylene glycol 4.5 Pigment 15.5 Mica titanium
5.5 fragrance
0.1 Example 5 12 g of the solid foundation shown in Table 3 below, which does not contain a hydrophilic surfactant, was dispensed into a medium dish and fixed in a pedestal. Subsequently, 1 of POE (7,5) nonylphenyl ether, which is a hydrophilic surfactant with an HLB of 10 or more, was added.
A paper press sheet, which had been sprayed with a 0% alcohol solution and then dried, was coated on the surface of the solid foundation and pressed at a pressure of 30 kg/a+1 to obtain a product.

Table 3 Mica-based powder 10.0 talc
58.9 kaolin
10.0 Titanium dioxide 5
．． 0 Iron oxide red 1.0 Iron oxide yellow 3.0 Iron oxide wAo, 1 Squalane 4.0 Liquid paraffin 4.0 Trimethylolpropane triisostearate 1.0 Silicone oil 2.0 Sorbitan sesquioleate 1.0 Example 6 Place 20 pieces of the same solid foundation as in Example 5 in the medium plate.
g was dispensed and fixed in the pedestal. Next, a press sheet made of paper impregnated with a 3% alcohol solution of 1,3-butylene glycol, which is a polyhydric alcohol, and then dried, was coated on the front of the solid foundation, and then 40 kg/a was applied.
A product was obtained by pressing at a pressure of 1 liter.

(Effects of the Invention) As described above, the present invention is a molding method characterized by impregnating or coating a press sheet with a mold release agent.
If pressing is performed while coating the surface of the solid powder cosmetic with the impregnated or applied pressing sheet, the pressing sheet can be easily peeled off without adhering to the surface of the solid powder cosmetic, even when the pressing pressure is strong. Therefore, the surface of the solid powder cosmetic has a smooth and beautiful finish. In addition, even when stamping a pattern or the like, clear marks can be left on the surface of the solid powder cosmetic, making it possible to obtain a product with high added value. It is possible to prevent the generation of non-defective products, and also to obtain a solid powder cosmetic in which the press sheet does not absorb oil and the formulation does not change even if the product contains a large amount of oil.

Claims (6)

[Claims] (1) After dispensing the solid powder cosmetic into an inner tray fixed in the pedestal, press a sheet impregnated with or coated with a release agent to coat the surface of the solid powder cosmetic. A method for molding a solid powder cosmetic characterized by pressure molding. (2) The method for molding a solid powder cosmetic according to claim 1, wherein the mold release agent is a lipophilic surfactant with an HLB of 5 or less. (3) The method for molding a solid powder cosmetic according to claim 1, wherein the mold release agent is a hydrocarbon that is liquid at room temperature. (4) The method for molding a solid powder cosmetic according to claim 1, wherein the mold release agent is volatile silicone. (5) The method for molding a solid powder cosmetic according to claim 1, wherein the mold release agent is a hydrophilic surfactant with an HLB of 10 or more. (6) The method for molding a solid powder cosmetic according to claim 1, wherein the mold release agent is a polyhydric alcohol.