CN110753536B

CN110753536B - Polyurethane foam face film material and preparation method thereof

Info

Publication number: CN110753536B
Application number: CN201880040201.0A
Authority: CN
Inventors: 金炫廷; 朴一圭; 李承纹; 崔用奂; 李浩硕
Original assignee: GENEWEL CO Ltd
Current assignee: GENEWEL CO Ltd
Priority date: 2017-06-16
Filing date: 2018-05-28
Publication date: 2022-07-08
Anticipated expiration: 2038-05-28
Also published as: CN110753536A; KR101826664B1; WO2018230859A1

Abstract

The present invention relates to a polyurethane foam mask material and a method for preparing the same, and more particularly, to a polyurethane foam mask material and a method for preparing the same, wherein the polyurethane foam mask material comprises a polyurethane foam containing an active ingredient in cells formed by foaming the polyurethane foam, wherein the active ingredient is one or more selected from the group consisting of hyaluronic acid, collagen, paper mulberry extract, arbutin, ethyl ascorbyl ether, oil-soluble licorice extract, ascorbyl glucoside, magnesium ascorbyl phosphate, niacinamide, α -bisabolol, ascorbyl tetraisopalmitate, retinol palmitate, adenosine, Fibroblast Growth Factor (FGF), Hepatocyte Growth Factor (HGF), epidermal cell growth factor (EGF), polyethoxylated retinoamide, and glycerin, the polyurethane foam contains 0.1-45 wt% of effective components relative to 100 wt% of the polyurethane foam containing the effective components. According to the present invention, there are effects of providing a polyurethane foam mask material which is excellent in adhesion to the skin and has excellent moisturizing ability to the skin and supply of a cosmetic liquid, and particularly providing a polyurethane mask material of a fine porous polyurethane foam structure which can provide an optimum environment in which an active ingredient is absorbed into the skin.

Description

Polyurethane foam face film material and preparation method thereof

Technical Field

The present invention relates to a polyurethane foam mask material and a method for preparing the same, and more particularly, to a polyurethane foam mask material having an excellent adhesion force to the skin and an excellent moisturizing ability to the skin and a supply of a cosmetic solution, and more particularly, to a polyurethane foam mask material having a fine porous polyurethane foam structure capable of providing an optimum environment in which a cosmetic solution is absorbed into the skin, and a method for preparing the same.

Background

A mask material as a support for a mask needs to maintain a moisturizing environment of the skin, have an excellent cosmetic liquid loading capacity without loss, and the cosmetic liquid needs to be stably supplied and absorbed into the skin. When such a mask material is classified, there are roughly a Peel-off (Peel-off) type, a Wash-off (Wash-off) type, a wipe-off (Tissue-off) type, a Patch (Patch) type, a powder type, and the like. These have advantages and disadvantages, respectively, but among them, the patch type is widely used due to convenience in use.

The Patch (Patch) type can be classified into a form using nonwoven fabric or paper and a form using Hydrogel (Hydrogel). Although the mask material in the form of a nonwoven fabric or paper has an advantage of low cost, it is easy to pass air, and therefore, it is not effective for the basic purpose of use of the mask, that is, for covering the face with the mask material to temporarily block the outside air, so that moisture continuously evaporated from the surface of the skin is retained between the mask material and the skin to soften the keratin, whereby the active ingredients of the mask material are easily absorbed, and the moisture is not evaporated from the skin surface, the temperature of the skin becomes high, the sweating action becomes vigorous, and wastes, dirt trapped in pores, and the like are absorbed by the mask material and discharged. Further, the nonwoven fabric has a disadvantage of poor adhesion feeling due to the Lint (Lint) having a fibrous structure. In addition, although the Hydrogel (Hydrogel) form mask material can solve the disadvantages of the paper and non-woven form mask material and has excellent skin attachment feeling, it is difficult to be conventionally used instead of the paper and non-woven form mask material due to its high price.

[ Prior art documents ]

[ patent document ] (patent document 1) Korean patent laid-open No. 10-1500987

Disclosure of Invention

Technical problem to be solved

In order to solve the problems of the prior art as described above, the present invention has been made to solve the problems of the prior art, and particularly, the problems of the Patch (Patch) type mask material, and an object of the present invention is to provide a polyurethane foam mask material which is excellent in the adhesion force to the skin and has excellent moisturizing power to the skin and excellent in the supply of a cosmetic liquid, and particularly, to provide a polyurethane mask material having a fine porous polyurethane foam structure which can provide an optimum environment in which a cosmetic liquid is absorbed into the skin, and a method for preparing the same.

The above object and other objects of the present invention can be achieved by the present invention described below.

Technical scheme

In order to achieve the above object, the present invention provides a polyurethane foam facing material comprising a polyurethane foam, the polyurethane foam contains an active ingredient in a foam-molded cell containing the active ingredient, wherein the active ingredient is at least one selected from the group consisting of hyaluronic acid, collagen, paper mulberry extract, arbutin, ethyl ascorbyl ether, oil-soluble licorice extract, ascorbyl glucoside, magnesium ascorbyl phosphate, nicotinamide, alpha-bisabolol, ascorbyl tetraisopalmitate, retinol palmitate, adenosine, Fibroblast Growth Factor (FGF), Hepatocyte Growth Factor (HGF), Epidermal Growth Factor (EGF), polyethoxylated retinol, and glycerol, and the active ingredient is contained in an amount of 0.1 to 45 wt% based on 100 wt% of the polyurethane foam containing the active ingredient.

In addition, the invention provides a preparation method of the polyurethane foam facing material, which comprises the following steps: (i) adding polyol, dihydric alcohol or a mixture of the polyol and the dihydric alcohol, stirring, adding isocyanate, and reacting in a nitrogen atmosphere until the NCO content (mol%) reaches the theoretical value of 1.0-15 mol% to prepare a polyurethane prepolymer; (ii) uniformly mixing the effective components, the surfactant, the chain extender and the cross-linking agent to prepare a foaming mixed solution; (iii) mixing the prepared polyurethane prepolymer and the foaming mixed solution, foaming on first release paper, and simultaneously spraying air at the temperature of 1-20 ℃ to delay solidification and keep the viscosity of polyurethane foaming foam; (iv) adhering a second release paper on the polyurethane foam which keeps the viscosity, and then curing; and (v) passing the adhered foamed foam through a pressure regulating part and a drying part, wherein the active ingredient is one or more selected from hyaluronic acid, collagen, broussonetia papyrifera extract, arbutin, ethyl ascorbyl ether, oil-soluble licorice extract, ascorbyl glucoside, magnesium ascorbyl phosphate, niacinamide, alpha-bisabolol, ascorbyl tetraisopalmitate, retinol palmitate, adenosine, Fibroblast Growth Factor (FGF), Hepatocyte Growth Factor (HGF), Epidermal Growth Factor (EGF), polyethoxylated retinol, and glycerol.

In addition, the present invention provides a continuous preparation apparatus for preparing the above mask material, which is sequentially composed of a left and right moving type foaming unit, a cooling unit, a press roller, and a drying unit.

Advantageous effects

According to the present invention, there are provided a polyurethane foam mask material comprising a polyurethane foam containing an active ingredient in cells that contain the active ingredient and are foam-molded, which has an excellent adhesion force to the skin, provides moisturizing power to the skin, and has an excellent supply of a cosmetic liquid, and a method for producing the same.

Drawings

FIG. 1 is a schematic view for explaining an apparatus used in the continuous production method of a polyurethane foam facing material of the present invention.

Fig. 2 is a photograph of the surfaces of the polyurethane foam facial mask material of example 5 of the present invention, the nonwoven facial mask material of comparative example 1, the hydrogel facial mask material of comparative example 2, and the biocellulose facial mask material of comparative example 3, taken by SEM (x 50 times).

FIG. 3 is a photograph taken by SEM of a cross section (. times.100) of a polyurethane foam face film material of example 5 of the present invention.

Fig. 4 is a photograph taken by SEM of a section (× 200 times) of polyurethane foam after foaming (i.e., before passing through a press roller) when a polyurethane foam facing material was prepared according to example 1 of the present invention.

FIG. 5 is a photograph taken by SEM of a cross section (x 200 times) of a polyurethane foam after passing through a press roll (pressure of 0.3 bar and speed of 7 m/min) when a polyurethane foam facing material was prepared according to example 1 of the present invention.

Detailed Description

The present invention will be described in detail below.

The polyurethane foam mask material of the present invention is characterized by comprising a polyurethane foam containing an active ingredient in foam-molded cells containing the active ingredient, wherein the active ingredient is at least one selected from the group consisting of hyaluronic acid, collagen, broussonetia papyrifera extract, arbutin, ethyl ascorbate ether, oil-soluble licorice extract, ascorbyl glucoside, magnesium ascorbyl phosphate, nicotinamide, α -bisabolol, ascorbyl tetraisopalmitate, retinol palmitate, adenosine, Fibroblast Growth Factor (FGF), Hepatocyte Growth Factor (HGF), Epidermal Growth Factor (EGF), polyethoxylated retinol, and glycerin, preferably glycerin, and 0.1 to 45% by weight of the active ingredient relative to 100% by weight of the polyurethane foam containing the active ingredient, therefore, the cosmetic composition has excellent mechanical strength, elongation, skin-fitting property, and excellent cosmetic and lifting effects.

The active ingredient exists in a form of being uniformly dispersed in the polyurethane foam.

As another example, the content of the active ingredient may be 0.3 to 40 wt%, 1 to 30 wt%, 10 to 30 wt%, 0.1 to 30 wt%, or 0.1 to 10 wt% with respect to 100 wt% of the polyurethane foam containing the active ingredient, within which mechanical strength, elongation, skin-attachment property are excellent, and moisturizing power and cosmetic liquid absorption power to the skin are excellent.

The active ingredients can be classified into (1) alcohols (glycerin, retinol, ethyl ascorbyl ether, α -bisabolol, adenosine, polyethoxylated retinol) according to the kind of the terminal group; (2) acids (acids) (hyaluronic acid, broussonetia extract (Loganin)), arbutin, retinol palmitate); (3) growth cells (fibroblast growth factor (FGF), Hepatocyte Growth Factor (HGF), Epidermal Growth Factor (EGF)); and (4) others (ascorbyl tetraisopalmitate, collagen, oil soluble licorice extract, niacinamide), each classification may be included in a different content range.

As a specific example, the content of the alcohol (1) may be 0.5 to 40 wt%, 1 to 30 wt%, 5 to 25 wt%, or 10 to 20 wt% with respect to 100 wt% of the polyurethane foam containing the active ingredient, the content of the acid (2) may be 0.1 to 30 wt%, 0.1 to 20 wt%, 0.5 to 10 wt%, or 0.5 to 5 wt% with respect to 100 wt% of the polyurethane foam containing the active ingredient, the content of the growing cell type (3) may be 0.1 to 30 wt%, 0.1 to 20 wt%, 0.1 to 10 wt%, or 0.1 to 5 wt%, and the content of the nicotinamide may be 0.1 to 30 wt%, 0.5 to 20 wt%, or 1 to 15 wt%, but is not limited thereto.

The polyurethane foam mask material may further include 30 to 600 parts by weight, 30 to 400 parts by weight, 50 to 300 parts by weight, or 100 to 250 parts by weight of a cosmetic liquid based on 100 parts by weight of the polyurethane foam, within which the cosmetic liquid is excellent in the effect of being absorbed into the skin.

As an example, the cosmetic liquid may contain functional ingredients for whitening, wrinkle care, elasticity improvement, or skin regeneration.

As an example, the mask material of the present invention is characterized in that the absorption force (load force) is 1.0 to 3.0g/cm³、1.5～3.0g/cm³、1.9～3.0g/cm³Or 2.3 to 3.0g/cm³The cosmetic liquid is easily absorbed within the above range, thereby providing an improved cosmetic effect.

Hair brushThe absorption force (load force) in the open air can be measured according to the test standard EN 13726-1, in particular by measuring the area of 25cm²The weight of (W1) of the sample was measured by immersing the sample in distilled water (37. + -. 1 ℃) corresponding to 40 times the weight of the sample, removing moisture from the surface after leaving the sample in a thermostat (37. + -. 1 ℃) for 30 minutes, and then measuring the weight (W2) and calculating according to the following numerical formula 1.

[ mathematical formula 1]

Absorption force (g/cm)³) (W2-W1) g/area of initial sample (cm)²) X thickness (cm)

As an example, the mask material of the present invention may be characterized in that the moisturizing power may be 0.3 to 2.5g/cm³、0.4～2.3g/cm³、0.4～2.0g/cm³Or 0.8 to 2.0g/cm³The present invention has the advantage of excellent skin moisturizing effect within the above range.

The moisturizing ability in the present invention can be measured by measuring the area of 25cm²The weight (a), area and thickness of the sample (a) were measured for the absorption force by the above-mentioned method, and then the weight (D) was measured after pressing for 20 seconds with a weight of 5kg, and then the calculation was performed according to the following mathematical formula 2.

[ mathematical formula 2]

Moisture retention (g/cm)³) (D-a) (g)/area of initial sample (cm)²) X thickness (cm)

As an example, the mask material of the present invention may have a tensile strength of 0.1 to 1.7N/mm²、0.5～1.5N/mm²Or 0.5 to 1.0N/mm²Within this range, the effect of excellent balance of physical properties is exhibited.

The tensile strength in the present invention is measured according to the standard measurement method ASTM D638 under the condition that the tensile speed is 500 mm/min.

As an example, the mask material of the present invention has an elongation of 600 to 1300%, 650 to 1200%, or 700 to 1200%, and within this range, the mask material has an excellent adhesive force at a curved portion of a face, has an excellent feeling of use even in daily life in a state of a mask application, has an improved absorption force of a cosmetic liquid, and can also obtain a skin lifting effect.

The elongation in the present invention can be measured according to the standard measurement method ASTM D638.

As an example, the density of the polyurethane foam surface film material is 0.25-2.0 g/cm³、0.3～1.5g/cm³、0.3～1.3g/cm³、0.3～0.60g/cm³Or 0.7 to 1.3g/cm³In this range, the curved surface of the face portion has excellent adhesion, and the mask sheet has an effect of preventing the mask sheet from moving or falling even in daily life.

As an example, the mask material may have a pore (pore) size of 25 to 300 μm, 50 to 250 μm, 50 to 150 μm, or 50 to 100 μm, within which the effect of increasing the loading force of the active ingredient is contained.

The size of the holes in the mask material is 25-300 mu m or less, which means that the size of 80% or more, 90% or more or all the holes in the mask material layer is 25-300 mu m or less.

In addition, as an example, the mask material may have a cell size (cell size) of 25 to 400 μm, preferably 30 to 300 μm, and more preferably 50 to 150 μm, in which the loading of the active ingredient is high, and thus the effect of imparting moisturizing power to the skin is excellent.

The pore size and cell size are the average of the diameters measured for the longest distance at 7 points of the platinum coated samples selected by Scanning Electron Microscopy (SEM).

According to an example, the thickness of the polyurethane foam mask material may be 0.15 to 0.80mm, 0.15 to 0.55mm, 0.25 to 0.50mm, or 0.30 to 0.50mm, and the effect of excellent adhesion to the skin is exhibited in this range.

As one example, the polyurethane foam mask material may be characterized as a single-layer polyurethane foam mask material.

Specifically, the mask material has a single-layer structure having fine pores formed therein and having a thickness of 0.15 to 0.80mm, a pore size of 50 to 250 μm and a cell size of 25 to 400 μm, and has an excellent effect of imparting moisturizing power to the skin because of the structure that is excellent in adhesion to the skin and a high loading force of active ingredients.

As another example, the mask material may consist of a first layer having a pore size of 25 to 300 μm and a thickness of 0.14 to 0.78mm or 0.14 to 0.548mm and a second layer having a pore size of 50 to 300 μm and a thickness of 0.01 to 0.02 mm.

As an example, the first layer may be formed on a surface contacting the first release paper, and the second layer may be an upper portion of polyurethane foam foamed on the first release paper.

As an example, the pore size of the first layer may be formed smaller than the pore size of the second layer.

As an example, the mask material of the present invention immersed in a cosmetic liquid may have an effect of having an excellent adhesion force to the skin in the range of 0.07 to 0.20gf/30mm, 0.08 to 0.15gf/30mm, or 0.085 to 0.11gf/30 mm.

The adhesion force in the present invention can be measured by wiping the surface of a Stainless steel plate (Stainless plate) with ethanol, leaving it for at least 10 minutes, and then attaching one surface of a sample having a width of 3cm × a length of 10cm to the Stainless steel plate, while leaving the other surface thereof to be fixed in a tensile strength tester (INSTRON 3366 series). The speed of the automatic roller was set to 600 m/min, and then the sample, which was subjected to 3 times of reciprocating pressure application to the plate (plate) surface to which the sample was attached by the automatic roller, was loaded on a tensile strength tester, and then the sample was pulled at a speed of 300 mm/min until the end portion of the sample attached to the plate surface was dropped, and the average value in the interval of 20mm to 80mm in the graph was calculated.

As an example, the mask material may include 30 to 200 parts by weight of a cross-linking agent, 0.1 to 30 parts by weight of a surfactant, 5 to 50 parts by weight of a chain extender, and 10 to 100 parts by weight of an active ingredient, with respect to 100 parts by weight of a polyurethane prepolymer, and has an effect of excellent skin moisturizing ability and an effect of excellent absorption of a cosmetic liquid within the range.

As another example, the mask material may include 40 to 190 parts by weight or 45 to 180 parts by weight of a cross-linking agent, 0.5 to 10 parts by weight or 0.7 to 3 parts by weight of a surfactant, 5 to 40 parts by weight or 7 to 30 parts by weight of a chain extender, and 15 to 90 parts by weight or 20 to 85 parts by weight of an active ingredient, relative to 100 parts by weight of the polyurethane prepolymer, and has effects of excellent skin moisturizing ability, cosmetic liquid absorbability, and skin conformability.

The polyurethane prepolymer may be prepared by adding Isocyanate (Isocyanate) to polyol, diol or a mixture thereof, and may optionally further include 0.05 to 5 parts by weight, 0.1 to 4 parts by weight or 0.1 to 3 parts by weight of an antioxidant per 100 parts by weight of the polyurethane prepolymer, in which case mechanical strength and stability may be improved.

As an example, the antioxidant may be one or more selected from phenyl- β -naphthylamine, cysteine hydrochloride, dibutyl hydroxytoluene, nordihydroguaiaretic acid, butyl hydroxyanisole, phosphoric acid, citric acid, ascorbic acid, isoascorbic acid, propyl gallate, IRGANOX 1010, IRGANOX 1035, IRGANOX 1076, IRGANOX 1330, IRGANOX 1425WL, IRGANOX 3114, IRGANOX B215, IRGANOX B220, IRGANOX B225, IRGANOX B561, IRGANOX B313, IRGANOX B501W, IRGANOX B900, IRGANOX B1, IRGANOX B1412, IRGANOX PS800, IRGANOX PS802, IRGANOX P-EPQ.

The isocyanate may be aromatic, aliphatic and alicyclic isocyanates or a mixture thereof, and may be one or more selected from the group consisting of 2, 4-toluene diisocyanate, 2, 6-toluene diisocyanate, methylene diphenyl diisocyanate, 1, 5-naphthalene diisocyanate, dimethyl biphenyl diisocyanate, hexamethylene-1, 6-diisocyanate, isophorone diisocyanate, xylene diisocyanate, cyclohexylene-1, 4-diisocyanate, lysine diisocyanate, tetramethylene xylene diisocyanate and diphenylmethane diisocyanate.

As an example, the polyol may be one or more selected from the group consisting of polypropylene oxide glycol, polyethylene oxide glycol, polytetramethylene ether glycol, ethylene oxide/propylene oxide copolymer, polytetrahydrofuran/ethylene oxide copolymer, polytetrahydrofuran/propylene oxide copolymer, polybutylene carbonate glycol, polyhexamethylene carbonate glycol, polycaprolactone glycol, polyethylene adipate, polybutylene adipate, polypentyl adipate, and polyhexamethylene adipate.

As a more specific example, the polyol may use polyethylene oxide glycol and polypropylene oxide glycol having 2 or more hydroxyl groups and a number average molecular weight of 500 to 6,000g/mol in a mixture at a molar ratio of 4:6 to 8:2, or an ethylene oxide/propylene oxide copolymer having an ethylene oxide content of 20 to 90% by weight may be used.

As an example, the diol may be one or more selected from the group consisting of ethylene glycol, propylene glycol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, triethylene glycol, diethylene glycol, tetraethylene glycol, dipropylene glycol, dibutylene glycol, neopentyl glycol, 1, 4-cyclohexanedimethanol, 2-methyl-1, 3-pentanediol.

As an example, the surfactant may be one or more selected from the group consisting of F-68, F-87, F-88, F-108, F-127 of BASF corporation which is an ethylene oxide/propylene oxide block copolymer, L-44, L-64, L-580, L-603, L-688, L-5420, SZ-1703, L-6900, L-3150, Y-7931, L-1580, L-5340, L-5333, L-6701, L-5740M, L-3002, L-626, DOWFAX 63N10, DOWFAX 63N30, DOWFAX 81N13TB, DOWFAX DF-111, DOWFAX DF-117, DOWFAX DF-103, DOWFAX DF-104, DOWFAX DF-102 which are silicon-based surfactants which function to adjust the size and the rate of internal pores (pores), thereby improving the skin adhesion force and the load force.

As an example, the crosslinking agent may be one or more selected from chlorofluorocarbons (CFC-141b), Methylene chloride (Methylene chloride) and distilled water, and preferably distilled water is used, in which case it is easily mixed with other substances, and has an effect that the active ingredient and additives are uniformly distributed throughout the foam when the foam is foamed.

In particular, when distilled water is used as the crosslinking agent, it has an effect of preventing skin problems while having excellent stability.

As an example, the chain extender may use ethylene glycol (ethylene glycol), diethylene glycol (diethylene glycol), propylene glycol (propylene glycol), dipropylene glycol (dipropylene glycol), 1,3-butanediol (1, 3-butandiol), 1,3-propanediol (1,3-propanediol), 1,4-butanediol (1, 4-butandiol), 2-methylpentanediol (2-methylpentanediol), 1,5-pentanediol (1, 5-pentandiol), 3-methylpentanediol (3-methylpentanediol), 1,6-hexanediol (1,6-hexanediol), 1,4-cyclohexanediol (1,4-cyclohexanediol), 1, 4-cyclohexanedimethanol (1,4-cyclohexanediol), neopentyl glycol (1,4-cyclohexanediol), 1,4-butanediol (1,4-cyclohexanediol), 2-propanediol (1, 2-diamine), etc., alone or in combination, or 1, 2-diamine (1, 2-propanediol), etc, In the case of diamines such as 1, 3-propanediamine (1, 3-propylenediamine), isophoronediamine (isophoronediamine), ethylenediamine (ethylendiamine), N-methylpropylene-1,3-diamine (N-methylpropylene-1,3-diamine), and N, N '-dimethylethylenediamine (N, N' -diethyleneenediamine), 1,3-butanediol (1, 3-butandiol) is preferable, and in this case, the elongation is excellent.

The mask material may optionally further include an additive, and the additive may preferably be contained in an amount of 1 to 50 parts by weight, 5 to 40 parts by weight, or 10 to 30 parts by weight, based on 100 parts by weight of the polyurethane prepolymer, and has an effect of further improving skin moisturizing ability and absorbing ability within the above range.

As an example, the additive may be selected from butylene glycol, propylene glycol, Super Absorbent polymers (Super Absorbent polymers), antibacterial agents, pigments, propylene glycol alginate, methylcellulose, sodium carboxymethylcellulose, calcium carboxymethylcellulose, sodium carboxymethyl starch, sodium alginate, ammonium alginate, potassium alginate, calcium alginate, sodium caseinate, guar gum, locust bean gum, xanthan gum, cyclodextrin, gum arabic, gellan gum, carrageenan, karaya gum, casein, tara gum, tamarind gum, tragacanth gum, pectin, glucomannan, gum tamarind, arabinogalactan, furcellaran, pullulan, glucosamine, carboxymethylcellulose, chitin, chitosan, amino acids, L-aspartic acid, sodium L-aspartate, DL-alanine, L-isoleucine, lysine hydrochloride, sodium caseinate, sodium alginate, guar gum, locust bean gum, xanthan gum, cyclodextrin, gellan gum, carrageenan, chitosan, sodium alginate, DL-alanine, L-isoleucine, lysine hydrochloride, sodium alginate, and the like, sodium alginate, sodium, Glycine, glycerol, L-glutamine, L-glutamic acid, L-sodium glutamate, pyridine acid, L-threonine, sericin, serine, L-tyrosine, heparin, sodium chondroitin sulfate and gelatin.

The antibacterial agent may contain saccharides having antibacterial and granulation promoting effects, and specifically may be one or more selected from sucrose, sorbitol, mannitol, fructose, glucose, xylitol, lactose, maltose, maltitol and trehalose.

As another example, the antibacterial agent may contain a natural ingredient having an anti-inflammatory action, an antibacterial action, an antifungal action or a skin regenerating effect, specifically, the Extract may be one or more selected from tea tree oil (tea oil), Sophora flavescens Extract (Sophora Angustifolia Extract), Iris Extract (Iris Extract), Bioflavonoids (Bioflavonoids) derived from grapefruit (seed) Extract, Naringin (Naringin), Polypeptides (polypeptids), Tocopherols (Tocophereols), Asiatic Acid (Asiatic Acid) derived from Centella Asiatica (Centella Asiatica), Madecassic Acid (Madecassic Acid), β -Glucan (β -Glucan) extracted from mushrooms, Melia azedarach Extract (Neem Extract), Hamamelis virginiana Extract (Witch Hazel Extract), Allantoin (Allantoin), purslane Extract (Portulace Oleracea Extract), immature bitter orange Extract (Poncirus Extract), Phytosphingosine (Phosphoinosus Extract), and aloe Extract.

As another example, the antibacterial agent may contain a component capable of preventing infection and proliferation of infectious microbes, and specifically may be one or more selected from sulfadiazine, povidone-iodine, iodide ion salts, neomycin sulfate, rivanol, chlorhexidine, benzalkonium chloride, benzethonium chloride, and the like.

In this case, the affinity with the polyurethane foam is greatly improved by the chain formed from the hydrocarbon, and as a result, a stable structure can be formed in the produced polyurethane foam.

As an example, the hydrocarbon polymer having a polar group may be one or more selected from the group consisting of epoxy-modified polystyrene copolymer, ethylene-anhydrous ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-alkyl acrylate-acrylic acid copolymer, maleic anhydride-modified high density polyethylene, maleic anhydride-modified linear low density polyethylene, ethylene-alkyl methacrylate-methacrylic acid copolymer, ethylene-butyl acrylate copolymer, ethylene-vinyl acetate copolymer, and maleic anhydride-modified ethylene-vinyl acetate copolymer, in which case, there is an effect of excellent compatibility and blocking property.

As an example, the epoxy-modified polystyrene copolymer may include 100 parts by weight of a main chain formed of 70 to 99% by weight of styrene and 1 to 30% by weight of an epoxy compound and a branch chain formed of 1 to 80 parts by weight of an acrylic monomer.

The maleic anhydride-modified high-density polyethylene, the maleic anhydride-modified linear low-density polyethylene, and the maleic anhydride-modified ethylene-vinyl acetate copolymer may each include 0.1 to 10 parts by weight of a branch chain formed from maleic anhydride per 100 parts by weight of the main chain, and have the effect of being excellent in compatibility, ease of operation, and merchantability within this range.

As an example, the hydrocarbon polymer having a polar group may be added in a range of 0.1 to 10 parts by weight or 1 to 5 parts by weight based on 100 parts by weight of the polyurethane foam of the present invention, within which the affinity with the polyurethane foam is greatly improved, and as a result, there is an effect of forming a stable structure in the resulting polyurethane foam.

The preparation method of the polyurethane foam facing material comprises the following steps: (i) adding polyol, dihydric alcohol or a mixture of the polyol and the dihydric alcohol, stirring, adding isocyanate, and reacting in a nitrogen atmosphere until the NCO content (mol%) reaches the theoretical value of 1.0-15 mol% to prepare a polyurethane prepolymer; (ii) uniformly mixing the effective components, the surfactant, the chain extender and the cross-linking agent to prepare a foaming mixed solution; (iii) mixing the prepared polyurethane prepolymer and the foaming mixed solution, foaming on first release paper, and simultaneously spraying air at the temperature of 1-20 ℃ to delay solidification and keep the viscosity of polyurethane foaming foam; (iv) adhering a second release paper on the polyurethane foam which keeps the viscosity, and then curing; and (v) passing the adhered foamed foam through a pressure regulating part and a drying part, wherein the active ingredient may be one or more selected from hyaluronic acid, collagen, paper mulberry extract, arbutin, ethyl ascorbyl ether, oil-soluble licorice extract, ascorbyl glucoside, magnesium ascorbyl phosphate, niacinamide, α -bisabolol, ascorbyl tetraisopalmitate, retinol palmitate, adenosine, Fibroblast Growth Factor (FGF), Hepatocyte Growth Factor (HGF), Epidermal Growth Factor (EGF), polyethoxylated retinol, and glycerin.

The theoretical value of the NCO content (% by mole) can be calculated by titration using a standard solution of n-butylamine.

As a specific example, the preparation method of the polyurethane foam facing material comprises the following steps: (i) adding polyol, dihydric alcohol or a mixture of the polyol and the dihydric alcohol into a reactor, stirring at a stirring speed of about 300-800 RPM, heating to 70-80 ℃, then adding isocyanate, and reacting for 5-10 hours in a nitrogen atmosphere until the NCO content (mol%) reaches a theoretical value of 1.0-15.0 mol% or 7.0-10.0 mol% to prepare a polyurethane prepolymer; (ii) uniformly mixing 45-70 wt% of a cross-linking agent, 0.1-10 wt% of a surfactant, 5-17 wt% of a chain extender and 20-40 wt% of an active ingredient to prepare a foaming mixed solution; (iii) mixing the polyurethane prepolymer and the foaming mixed solution in a foaming machine according to the weight ratio of 1.0: 0.5-1.0: 3.0, stirring for 0.5-2.0 seconds at 1000-3000 RPM, foaming on first release paper, and simultaneously spraying air at 1-20 ℃ to delay curing and maintain the viscosity of polyurethane foaming foam; (iv) adhering a second release paper coated with organic silicon on the polyurethane foaming foam with the viscosity maintained, and then curing for 1.0-3.0 minutes in a drying part at 30-50 ℃; and (v) passing the adhered foamed foam through a pressure-regulating part and a drying part, wherein the active ingredient may include one or more selected from hyaluronic acid, collagen, broussonetia papyrifera extract, arbutin, ethyl ascorbyl ether, oil-soluble licorice extract, ascorbyl glucoside, magnesium ascorbyl phosphate, niacinamide, α -bisabolol, ascorbyl tetraisopalmitate, retinol palmitate, adenosine, Fibroblast Growth Factor (FGF), Hepatocyte Growth Factor (HGF), Epidermal Growth Factor (EGF), polyethoxylated retinol, and glycerin, thereby making it possible to prepare a mask material formed of a polyurethane foam.

As an example, considering the aspect of forming the foaming foam, the polyurethane prepolymer and the foaming mixture may be preferably used in a mixture at a weight ratio of 1:0.5 to 1:3, 1:0.75 to 1:3, or 1:0.75 to 1:2, and have an effect of excellent mechanical strength and skin-attachment property within the above range.

As a specific example, the foaming mixture may be 30 to 200 parts by weight of a cross-linking agent, 0.1 to 30 parts by weight of a surfactant, 5 to 50 parts by weight of a chain extender, and 10 to 100 parts by weight of an active ingredient, based on 100 parts by weight of the polyurethane prepolymer.

As another example, the foaming mixture may be 40 to 190 parts by weight or 45 to 180 parts by weight of a cross-linking agent, 0.5 to 10 parts by weight or 0.7 to 3 parts by weight of a surfactant, 5 to 40 parts by weight or 7 to 30 parts by weight of a chain extender, and 15 to 90 parts by weight or 20 to 85 parts by weight of an active ingredient, based on 100 parts by weight of the polyurethane prepolymer.

As an example, the foaming mixture may include 1 to 50 parts by weight, 5 to 40 parts by weight, or 10 to 30 parts by weight of a material selected from the group consisting of butylene glycol, propylene glycol, Super Absorbent polymers (Super Absorbent polymers), antibacterial agents, pigments, propylene glycol alginate, methyl cellulose, sodium carboxymethyl cellulose, calcium carboxymethyl cellulose, sodium carboxymethyl starch, sodium alginate, ammonium alginate, potassium alginate, calcium alginate, sodium caseinate, guar gum, locust bean gum, xanthan gum, cyclodextrin, gum arabic, gellan gum, carrageenan, karaya gum, casein, tara gum, tamarind gum, tragacanth gum, pectin, glucomannan, tamarind gum, arabinogalactan, furcellaran, pullulan polysaccharide, glucosamine, carboxymethyl cellulose, chitin, chitosan, amino acids, L-aspartic acid, glucosamine, chitosan, amino acids, L-aspartic acid, and mixtures thereof, based on 100 parts by weight of the polyurethane prepolymer, More than one additive selected from L-aspartic acid sodium, DL-alanine, L-isoleucine, lysine hydrochloride, glycine, glycerol, L-glutamine, L-glutamic acid, L-sodium glutamate, pyridine acid, L-threonine, sericin, serine, L-tyrosine, heparin, chondroitin sulfate sodium and gelatin.

As an example, in the method for preparing a mask material according to the present invention, when the foamed foam bonded in the step (v) passes through the pressure adjusting part, the pressure may be adjusted to prepare a flexible polyurethane foam mask material or a rigid polyurethane foam mask material.

In one example, the polyurethane foam surface film material having excellent adhesion to the skin can be prepared by increasing the density of the foamed foam by setting the pressure to 0.01 to 5 bar, 0.1 to 3 bar, 0.1 to 1 bar, or 0.1 to 0.5 bar and setting the speed to 1 to 10 m/min and 1 to 7 m/min for the polyurethane foam when passing through the pressure adjusting section.

As an example, the flexible polyurethane foam mask material may be used as a mask material covering the entire face, and the rigid polyurethane foam mask material may be used as a partial mask material, and as a specific example, may be used for an eyeground mask material, a splayed mask material, and the like.

The flexible polyurethane foam facing material and the rigid polyurethane foam facing material of the present invention can be prepared by adjusting the curing speed and temperature of the polyurethane foam, in addition to adjusting the pressure applied to the bonded foamed foam in step (v).

As an example, the adjustment of the pressure in the pressure adjusting part may be performed in a pneumatic cylinder manner, which is a manner of adjusting the pressure by injecting a certain amount of air into a pneumatic cylinder.

As an example, the polyurethane foam prepared as described above has a structure in which fine pores are formed with a thickness of 0.15 to 0.80mm and a pore size of 25 to 300 μm.

As another example, the polyurethane foam prepared as described above has a structure of a first layer having a pore size of 25 to 300 μm and a thickness of 0.14 to 0.78mm, and a second layer having a pore size of 50 to 300 μm and a thickness of 0.01 to 0.02 mm.

The polyurethane foam may be suitably stamped (Punching) into a facial shape and used as a facial mask material.

In addition, the polyurethane foam facing material of the present invention may further include an external contact layer, which may be a non-porous film obtained by adding 20 to 70 parts by weight of methyl ethyl ketone, 5 to 30 parts by weight of dimethylformamide, and 1 to 10 parts by weight of a pigment to 100 parts by weight of one or more resins selected from the group consisting of polyurethane, polyethylene terephthalate, and polypropylene, stirring, removing bubbles, and drying after coating it on the first release paper.

The material of the first release paper may be one selected from PP coated with silicone, PE, CP paper, PP alone, PE alone, PP and PE bonded release paper, PP and CP bonded release paper, but is not limited thereto.

The second release paper may be made of one selected from PET, PP, PE, CP paper, PP alone, PE alone, PP and PE bonded release paper, PP and PET bonded release paper, and PE and PET bonded release paper, but is not limited thereto.

Fig. 1 is a schematic diagram for explaining an apparatus used in the continuous production method of the polyurethane foam facing material.

Referring to fig. 1, an apparatus used in a continuous preparation method of a polyurethane foam facing material may include: a left-right moving type foaming unit 700 for applying the polyurethane prepolymer and the foaming mixed liquid to the first release paper 10a transferred on the conveyor; a cooling unit 500 for delaying solidification of the polyurethane prepolymer and the foaming mixture; a pressure adjusting part 900 having a pressing roller for compressing the urethane foam 10c and the second release paper 10b transferred by the cooling unit; and a drying section 800.

The upper portion of the right and left traveling foaming unit 700 is provided with a polyurethane prepolymer supply unit 700a and a foaming mixture supply unit 700b, the polyurethane prepolymer and the foaming mixture are supplied to the right and left traveling foaming unit 700 through a guide unit (not shown), and the right and left traveling foaming unit 700 may be provided at the end thereof with an air injection nozzle 500 as a cooling unit.

The first release paper 10a is supplied from a first release paper supply part 100, the second release paper 10b is supplied from a second release paper supply part 200, the first release paper, the polyurethane foam 10c formed thereon, and the second release paper 10b formed thereon are bonded by a bonding part 600 before being compressed by a pressing roller, and the bonding part 600 may include a release paper angle adjusting part 600a and a thickness adjusting part 600 b.

In addition, the width of the bonding part 600 and the pressure adjusting part 900 is 0.1 to 1.1m, and the density is 0.25 to 2.0g/cm³The mask material of (1) may be rolled by a rolling unit, which may include a polyurethane foam rolling part 400 and a second release paper rolling part 400.

Hereinafter, preferred embodiments are set forth to aid in understanding the present invention, but the following embodiments are merely illustrative of the present invention, and various changes and modifications, which are obvious to those skilled in the art, may be made within the scope and technical spirit of the present invention, and such changes and modifications also fall within the scope of the claims of the present invention.

[ examples ]

Experiments were conducted using the following materials in the following examples, comparative examples and reference examples.

Synthesis example 1 (polyurethane prepolymer)

A polyurethane prepolymer having isocyanate end groups was prepared by: using a 3 liter round-bottomed flask equipped with a stirrer, 140g of diphenylmethane diisocyanate and 86g of isophorone diisocyanate were charged, the temperature was raised to 80 ℃ and then a small amount of an ethylene oxide/propylene oxide random copolymer having 2 or more hydroxyl groups was added, and the reaction was carried out until the theoretical NCO mole% reached 8. Samples were taken in the middle of the reaction and NCO% was measured by titration using n-butylamine standard solution.

Synthesis example 2 (foaming mixture)

To prepare a foaming mixture to be reacted with the polyurethane prepolymer prepared in the synthesis example 1, 60.0 wt% of distilled water as a cross-linking agent, 27.0 wt% of glycerin as an active ingredient, 0.95 wt% of F-87 (basf corporation) as a surfactant, 10 wt% of 1,3-butanediol as a chain extender, 2.0 wt% of sodium alginate as an additive, and 0.05 wt% of a water-soluble pigment were added and uniformly mixed.

Synthesis example 3 (foaming mixture; containing no active ingredient)

To prepare a foaming mixture reacted with the polyurethane prepolymer prepared in the synthesis example 1, 87 wt% of distilled water as a cross-linking agent, 0.95 wt% of F-87 (basf corporation) as a surfactant, 10 wt% of 1,3-butanediol as a chain extender, 2.0 wt% of sodium alginate as an additive, and 0.05 wt% of a water-soluble pigment were added and uniformly mixed.

Example 1

Synthesis examples 1 and 2 were mixed at a weight ratio of 1:0.75 in a foaming machine having a discharge nozzle at the end. Stirring was performed at 3,000rpm for 5 seconds in the foaming machine, and then the foaming mixture was foamed on a first release paper to which polypropylene was adhered while spraying air at 15 ℃ to delay curing and maintain the viscosity of the polyurethane foamed foam, wherein the first release paper was moved at a speed of 7m per minute on a conveyor.

Then, in order to supply the second release paper to which polyethylene is adhered on the polyurethane foam, the roller member of the conveyor is diverged to rotate in a state of being inclined at an angle of 15 to 20 ° with reference to the horizontal axis of the base frame, to pass through the cell in order to be adhered with the first release paper to which polypropylene is adhered, and then the thickness adjusting means of the adhering part is adjusted after curing for 3 minutes in the drying part of 35 ℃ so that the final thickness of the polyurethane foam is 300 μm, 400 μm, 500 μm, respectively, and then a pressure of 0.3 bar is applied in the pressure adjusting part in a state of having the upper release paper and the lower release paper to pass through the press roller to increase the density of the foam sheet.

Then, the polyurethane foam was cured (aging) in a second drying section at a temperature of 30 to 40 ℃ for 3 minutes to obtain polyurethane foam foams having final thicknesses of 300 μm, 400 μm, and 500 μm, respectively, which were wound into a roll in a polyurethane winding section.

Example 2

The same procedure as in example 1 was repeated except that in example 1, Synthesis examples 1 and 2 were mixed at a weight ratio of 1:1, to obtain polyurethane foam foams in sheet form wound in roll form and having final thicknesses of 300. mu.m, 400. mu.m, and 500. mu.m, respectively.

Example 3

The same procedure as in example 1 was repeated except that in example 1, Synthesis examples 1 and 2 were mixed at a weight ratio of 1:2, to obtain polyurethane foam foams in sheet form wound in roll form and having final thicknesses of 300. mu.m, 400. mu.m, and 500. mu.m, respectively.

Example 4

The same procedure as in example 1 was repeated except that in example 1, Synthesis examples 1 and 2 were mixed at a weight ratio of 1:3, to obtain polyurethane foam foams in sheet form wound in roll form and having final thicknesses of 300. mu.m, 400. mu.m, and 500. mu.m, respectively.

Example 5

The same procedure as in example 1 was repeated except that in example 1, synthesis examples 1 and 2 were mixed at a weight ratio of 1:1 and a pressure of 0.01 bar was applied in the pressure adjusting section, to obtain polyurethane foam foams in sheet form wound in roll form and having final thicknesses of 300 μm, 400 μm, 500 μm, and 800 μm, respectively.

Example 6

The polyurethane foam having a thickness of 300 μm, 400 μm, or 500 μm prepared in example 2 was immersed in a cosmetic liquid to prepare a mask.

The cosmetic liquid comprises refined water, propylene glycol, and beta-Glucan (beta-Glucan) extracted from Agaricus campestris.

Example 7

The polyurethane foam foams having a thickness of 300 μm, 400 μm and 500 μm prepared in example 5 were immersed in a cosmetic liquid to prepare a mask.

Example 8

Comparative example 1

For comparison of physical properties, a mask material of a nonwoven fabric material (P & C) was used. The mask material is not immersed in a cosmetic liquid.

Comparative example 2

For comparison of physical properties, a mask material of hydrogel material (manufactured by Genic corporation) was used. The mask material is not immersed in a cosmetic liquid.

Comparative example 3

For comparison of physical properties, a mask material made of a bio-cellulose material (manufactured by Hucos Korea) was used. The mask material is not immersed in a cosmetic liquid.

Comparative example 4

A Mask (Skin Signature 3D refining Mask) impregnated with a cosmetic liquid was used as a nonwoven Mask material.

Comparative example 5

As the mask material in the form of hydrogel, a mask impregnated with a beauty fluid (Reskin's Reskin hydrogel mask) was used.

Comparative example 6

As a mask material in a form of biocellulose, a mask (lancome essence Skin mask) impregnated with a cosmetic liquid was used.

Comparative example 7

The same procedure as in example 1 was repeated except that in example 1, Synthesis examples 1 and 3 were mixed at a weight ratio of 1:1, to obtain polyurethane foam foams in sheet form wound in roll form and having final thicknesses of 300. mu.m, 400. mu.m and 500. mu.m, respectively.

Reference example 1

The same process as in example 1 was repeated except that no pressure was applied to the pressure regulating section in example 1, and polyurethane foam foams having final thicknesses of 300 μm, 400 μm, and 500 μm, respectively, were obtained in a sheet form and wound into a roll form.

Reference example 2

The same process as in example 1 was repeated except that the pressure of the pressure regulating section was set to 5.5 bar in example 1, and polyurethane foam foams having final thicknesses of 300 μm, 400 μm, and 500 μm, respectively, were obtained in a sheet form, which was wound into a roll.

Additional example 1

The same procedure as in example 2 was repeated except that 1.2% by weight of hyaluronic acid was contained with respect to 100% by weight of the polyurethane foam containing an effective ingredient, to obtain a polyurethane foam having a final thickness of 300 μm wound in a roll shape.

Additional example 2

The same process as in the example 2 was repeated except that Epidermal Growth Factor (EGF) was contained in an amount of 0.1 wt% with respect to 100 wt% of the polyurethane foam containing the effective ingredient, to obtain a polyurethane foam having a final thickness of 300 μm, which was wound in a roll shape.

Additional example 3

The same procedure as in example 2 was repeated except that niacinamide was contained in an amount of 2.5% by weight relative to 100% by weight of the polyurethane foam containing the effective ingredient, to obtain a polyurethane foam having a final thickness of 300 μm wound in a roll shape.

[ test examples ]

Physical properties of examples 1 to 7, comparative examples 1 to 7, reference examples 1 to 2 and additional examples 1 to 3 were measured by the following methods, and physical properties of the mask material are shown in table 1 below, and physical properties of the mask material immersed in the cosmetic liquid are shown in table 2 below.

Further, the change rate of the weight of the beauty fluids of the polyurethane facial mask having a thickness of 500 μm of example 7 and the facial masks of comparative examples 4 to 6 was measured by the following method, and the results thereof are shown in table 3 below.

Further, the physical properties of the polyurethane foam foams of example 2 and comparative example 7 having a thickness of 300 μm and the polyurethane foam foams of additional examples 1 to 3 were measured by the following methods, and the results thereof are shown in the following table 4.

Thickness of

The thickness of the facial mask material was measured with a Digital display thickness gauge (Digital gauge) of Mitutoyo (Mitutoyo) corporation, japan.

Absorption force (load force)

The absorption force can be measured according to the test standard EN 13726-1, in particular by measuring the area of 25cm²The weight (W1) and thickness of the sample (D) were calculated by immersing the sample in distilled water (37. + -.1 ℃ C.) 40 times the weight of the sample, removing the surface moisture after leaving the sample in a thermostat (37. + -.1 ℃ C.) for 30 minutes, and then measuring the weight (W2) according to the following equation 1.

[ mathematical formula 1]

Absorbency (g/cm)³) (W2-W1) g/area of initial sample (cm)²) X thickness (cm)

Moisture retention

The moisturizing force is measured by measuring the weight (a), area and thickness of the sample before measurement, measuring the absorption force by the above-described method, then measuring the weight (D) after pressing for 20 seconds with a weight of 5kg, and then calculating according to the following equation 2.

[ mathematical formula 2]

Moisture retention (g/cm)³) Area (cm) of initial sample (g ═ D-a)²) X thickness (cm)

Tensile strength

Tensile Strength (N/mm)²) The measurement is performed by measuring the thickness using a thickness measuring instrument using foam (foam), placing the sample on a jig of the measuring instrument to apply a certain force to the entire area of the cross-sectional area of the sample, and stretching the sample at a stretching speed of 500 mm/min, measuring the strength at break, and performing calculation according to the following mathematical formula 3.

[ mathematical formula 3]

Tensile Strength (N/mm)²) Maximum breaking strength (N)/cross-sectional area (mm) of the sample²)

Elongation percentage of the polymer

The elongation (%) is measured according to a standard measurement method ASTM D638.

Density (Density)

The density is measured by placing a sample before measurement in a flat place, measuring the middle transverse and longitudinal dimensions of the product after removing unnatural tension, then measuring the weight with a scale, and then calculating according to the following mathematical formula.

[ mathematical formula 4]

Density (g/cm)³) Weight (g)/[ lateral (cm) × longitudinal (cm) × thickness (cm)]

Adhesive force

(1) Pretreatment of samples

Firstly, wiping the surface of a Stainless steel plate (Stainless plate) with ethanol, and standing for at least 10 minutes.

② one side of a sample having a width of 3 cm. times.10 cm was attached to a stainless steel plate, and the other side was left to be fixed in a tensile strength tester (INSTRON 3366 series).

(iii) setting the speed of the automatic roller to 600 m/min, and then applying pressure to the surface of the plate (plate) to which the sample is attached to the plate back and forth 3 times with the automatic roller.

(2) Measuring method

The sample was loaded on a tensile strength tester with 3 times of pressure application to and from an automatic roller and then pulled at a speed of 300 mm/min until the end portion of the sample attached to the plate surface dropped.

Secondly, calculating the average value of the interval of 20 mm-80 mm in the curve chart.

Rate of change in weight of cosmetic liquid (experiment for confirming retention of functional ingredients of cosmetic liquid)

(1) Pretreatment of samples

The sample size was prepared to be 3cm in the lateral direction by 3cm in the longitudinal direction.

② the weight of the sample is measured, and the sample is immersed in the beauty treatment liquid 10 times the weight of the sample for 10 minutes to be sufficiently absorbed.

The cosmetic liquid has a viscosity (25 deg.C, 20RPM) of 2,000cp, and contains purified water, propylene glycol, and beta-Glucan (beta-Glucan) extracted from Agaricus campestris as main ingredients.

(2) Measuring method

The sample immersed in the beauty solution was placed in an oven at 32 ℃ and the weight was measured every 5 minutes, and the rate of change (%) in the beauty solution weight was calculated according to the following formula.

[ math figure 5]

The cosmetic liquid weight change rate (%) [ (W2-W1) g/(W1) g ] × 100

W1: initial weight (g)

W2: weight after drying (g)

Measurement of Morphology (Morphology) (pore and cell size)

(1) Measuring device

Scanning Electron Microscope (SEM)

(2) Pretreatment of samples

The sample was cut to size and then fixed on a measuring plate.

Coating was performed using a platinum coater.

(3) Measuring method

The finished coated sample was loaded in a scanning electron microscope.

Vacuum and electron beam were set, and then measurement was performed at a set magnification.

The pore size and cell size were measured by selecting 7 points (points) in the measurement photograph.

Sensory evaluation (skin adhesion)

20 healthy male and female subjects were tested with the mask material immersed in a cosmetic liquid. The test method is as follows: after applying the mask material immersed in the beauty solution to the face of the subject, the subject was left for 20 minutes, and then the subject evaluated the adhesion of the mask material to the skin according to the following criteria.

Very good: very excellent, o: excellent, Δ: in general, X: failure to meet the requirements

[ Table 1]

As shown in Table 1, it is understood that examples 1 to 5 of the present invention have excellent tensile strength and excellent elongation, and the density is 0.25 to 2.0g/cm²The adhesive force is excellent even in a curved surface of the face portion, and the mask film does not move or fall off even in daily life.

However, comparative examples 1 to 3 and comparative example 7, which is a foam-molded polyurethane foam film facing material containing no active ingredient, have low elongation and thus poor adhesion to the skin. In addition, it is found that the elongation is very low or high in reference examples 1 to 2, and the density is not 0.25 to 2.0g/cm²And thus the adhesion force to the skin is deteriorated.

It is also found that the density of reference examples 1 and 2 in which no pressure or a pressure of 5.5 bar is applied to the pressure regulating part is not 0.25 to 2.0g/cm²So that the adhesion force to the skin is deteriorated.

[ Table 2]

As shown in table 2, examples 6 to 7 in which the mask material of the present invention was immersed in a cosmetic liquid had excellent effects in all of tensile strength, elongation, adhesive force, and sensory evaluation for evaluating adhesive force to the skin, as compared with comparative examples 4 to 6.

[ Table 3]

The hatched portion is a portion where the weight of the cosmetic liquid is not changed when the rate of change in the weight of the cosmetic liquid is measured, and the absence of the weight change indicates that the cosmetic liquid is not released from the mask to the skin.

As shown in table 3, it was confirmed that example 7, which is a polyurethane foam material of the present invention, has superior retention and sustaining power of a cosmetic liquid, compared to a nonwoven fabric material (comparative example 4), a hydrogel material (comparative example 5), and a biocellulose material (comparative example 6).

[ Table 4]

As shown in table 4, it was confirmed that, compared with comparative example 7 containing no active ingredient, additional example 1 containing hyaluronic acid as an acid, additional example 2 containing Epidermal Growth Factor (EGF) as a growth cell, and additional example 3 containing nicotinamide as another additive have not only excellent absorption and moisturizing ability, but also improved tensile strength and elongation as well as the same effect as example 2 containing glycerol as an alcohol as an active ingredient.

Further, the polyurethane foam mask material of the present invention is characterized in that the density is reduced to uniformly form fine pores upon foaming and then passed through a compression roller, thereby maintaining excellent properties of pores or cells and providing high density, and fig. 4 and 5 are photographs of a section thereof taken with SEM at the time of preparing the polyurethane foam mask material according to an example of the present invention, to confirm a density change of the foamed foam before and after passing through the compression roller.

Fig. 4 is a photograph taken by SEM of a section (× 200 times) of the polyurethane foam after foaming (i.e., before passing through a press roll) when preparing a polyurethane foam facing material according to example 1, and fig. 5 is a photograph taken by SEM of a section (× 200 times) of the polyurethane foam after passing through a press roll (pressure of 0.3 bar and speed of 7 m/min).

As shown in fig. 4 and 5, it was confirmed that the polyurethane foam passing through the nip roller maintained fine pores and the density was improved.

Claims

1. A polyurethane foam facing material characterized by comprising a polyurethane foam containing an active ingredient in a foam-molded cell containing the active ingredient, wherein the active ingredient is at least one selected from the group consisting of hyaluronic acid, collagen, paper mulberry extract, arbutin, ethyl ascorbyl ether, oil-soluble licorice extract, ascorbyl glucoside, magnesium ascorbyl phosphate, nicotinamide, alpha-bisabolol, ascorbyl tetraisopalmitate, retinol palmitate, adenosine, fibroblast growth factor, hepatocyte growth factor, epidermal growth factor, polyethoxylated retinol amide and glycerol, wherein the active ingredient is contained in an amount of 0.1 to 45% by weight based on 100% by weight of the polyurethane foam containing the active ingredient, and the polyurethane foam facing material has an elongation of 700 to 1200% as measured by ASTM D638, the density is 0.7 to 1.3g/cm³And is a single layer polyurethane foam facing material.

2. The polyurethane foam mask material according to claim 1, further comprising 30 to 600 parts by weight of a cosmetic liquid based on 100 parts by weight of the polyurethane foam.

3. The polyurethane foam mask material according to claim 1, wherein the moisture retention of the mask material measured according to the following numerical formula 2 is 0.3 to 2.5g/cm³，

[ mathematical formula 2]

Measured at 25cm²The weight a, area and thickness of the sample of the mask material collected in the size of (1) were calculated by immersing the sample in distilled water at 37 ± 1 ℃ which is 40 times the weight of the sample, leaving the sample in a thermostat at 37 ± 1 ℃ for 30 minutes, removing the water on the surface, pressing the sample with a weight of 5kg for 20 seconds, and measuring the weight D.

4. The polyurethane foam mask material according to claim 1, wherein the tensile strength of the mask material is 0.1 to 1.7N/mm measured at a tensile speed of 500 mm/min according to ASTM D638²。

5. The polyurethane foam mask material according to claim 1, wherein the mask material has a pore size of 25 to 300 μm and a thickness of 0.15 to 0.80 mm.

6. The polyurethane foam mask material according to claim 1, wherein the mask material is composed of a first layer having a pore size of 25 to 300 μm and a thickness of 0.14 to 0.78mm, and a second layer having a pore size of 50 to 300 μm and a thickness of 0.01 to 0.02 mm.

7. The polyurethane foam mask material according to claim 1, wherein the mask material comprises 30 to 200 parts by weight of a crosslinking agent, 0.1 to 30 parts by weight of a surfactant, 5 to 50 parts by weight of a chain extender, and 10 to 100 parts by weight of an active ingredient, based on 100 parts by weight of the polyurethane prepolymer.

8. The polyurethane foam mask material according to claim 7, further comprising 1 to 50 parts by weight of a material selected from the group consisting of butylene glycol, propylene glycol, an antibacterial agent, a pigment, propylene glycol alginate, methylcellulose, sodium carboxymethylcellulose, calcium carboxymethylcellulose, sodium carboxymethyl starch, sodium alginate, ammonium alginate, potassium alginate, calcium alginate, sodium caseinate, guar gum, locust bean gum, xanthan gum, cyclodextrin, gum arabic, gellan gum, carrageenan, karaya gum, casein, tara gum, tamarind gum, tragacanth gum, pectin, glucomannan, tamarind gum, arabinogalactan, furcellaran, pullulan, glucosamine, carboxymethylcellulose, chitin, L-aspartic acid, sodium L-aspartate, a polysaccharide, a cellulose gum, a cellulose acetate, a cellulose gum, a cellulose, a cellulose, a cellulose, a cellulose, a cellulose, a, more than one of DL-alanine, L-isoleucine, lysine hydrochloride, glycine, L-glutamine, L-glutamic acid, L-sodium glutamate, pyridine acid, L-threonine, sericin, serine, L-tyrosine, heparin, sodium chondroitin sulfate and gelatin.

9. A method for preparing a mask material, wherein the polyurethane foam mask material of claim 1 is prepared by comprising the steps of:

(i) adding polyol, dihydric alcohol or a mixture of the polyol and the dihydric alcohol, stirring, adding isocyanate, and reacting in a nitrogen atmosphere until the mol% content of NCO reaches a theoretical value of 1.0-15 mol% to prepare a polyurethane prepolymer;

(ii) uniformly mixing the effective components, a cross-linking agent, a surfactant and a chain extender to prepare a foaming mixed solution;

(iii) mixing the prepared polyurethane prepolymer and the foaming mixed solution, foaming on first release paper, and simultaneously spraying air at the temperature of 1-20 ℃ to delay solidification and keep the viscosity of polyurethane foaming foam;

(iv) adhering a second release paper on the polyurethane foam which keeps the viscosity, and then curing; and

(v) passing the bonded expanded foam through a pressure regulating section and a drying section,

wherein the active ingredient is at least one selected from hyaluronic acid, collagen, paper mulberry extract, arbutin, ethyl ascorbyl ether, oil-soluble licorice extract, ascorbyl glucoside, magnesium ascorbyl phosphate, niacinamide, alpha-bisabolol, ascorbyl tetraisopalmitate, retinol palmitate, adenosine, fibroblast growth factor, hepatocyte growth factor, epidermal growth factor, polyethoxylated retinoamide, and glycerol.

10. A continuous production apparatus for a mask material, characterized in that it is an apparatus for producing the polyurethane foam mask material of claim 1, comprising: a left-right moving type foaming unit for applying the polyurethane prepolymer and the foaming mixed liquid to the first release paper conveyed on the conveyor; a cooling unit for delaying solidification of the polyurethane prepolymer and the foaming mixed liquid; a pressure adjusting part provided with a press roller for compressing the polyurethane foam and the second release paper conveyed by the cooling unit; and a drying section.