KR101602049B1 - Method for production of double layer hydrogel mask pack - Google Patents

Abstract

The present invention relates to a method for preparing a dual hydrogel mask pack by applying an aqueous alginic acid or alginate solution onto a gelatin hydrogel layer and treating an aqueous solution containing a divalent or trivalent cation or a salt thereof or a salt thereof, And the alginic acid layer prevents direct exposure of the gelatin layer to the air to increase the effective time of the pack, and is excellent in moisturizing and nourishing absorption. Effect.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydrogel mask pack,

The present invention relates to a method for producing a dual hydrogel mask pack, and more particularly, to a method for producing a dual hydrogel mask pack, which comprises applying an aqueous alginic acid or alginate solution onto a gelatin hydrogel layer, treating a divalent or trivalent cation or a salt thereof, To a method for producing a dual hydrogel mask pack.

The mask pack is largely divided into a peel-off type (peel-off pack), a wash-off type (wash-out pack), and a sheet type (peel-off pack). There is a growing awareness that the double-portable and easy-to-use sheet-type mask pack is growing, and that it is effective at lower cost than conventional essence or nutrition cream as well as functional effects such as wrinkle improvement and whitening.

According to the Korean Cosmetics Association, the production of mask pack related products was KRW 60.4 billion in 2002, growing at a CAGR of over 21%, reaching about KRW 99.3 billion in 2010, resulting in an annual output of about 327 million.

On the other hand, the sheet type mask pack is divided into various types according to the sheet type, and is classified into a nonwoven fabric, a hydrogel, and a cellulose made of a natural fermentation material. In particular, hydrogel materials have been attracting attention in recent years.

Hydrogel is a new concept gel formulation that melts when it touches the skin. It is a material that absorbs the active ingredients of the skin in gel form to increase the skin absorption. A hydrogel usually contains a low molecular substance in a three-dimensional hydrophilic polymer network structure which may contain a large amount of water. In general, the hydrogel contains a large amount of liquid, but mechanically three-dimensional It exhibits the properties of solids which are elastic by crosslinking.

Hydrogels form a stable three-dimensional structure that is structurally almost free of fluidity to external hysteresis, and are classified into physical gels and chemical gels depending on the strength of the crosslinking linking the polymer chains. The physical gel is not formed by crosslinking by covalent bonding but is formed by microcrystals in the structure, electrostatic interactions and hydrophobic interactions such as crosslinking points to form a gel, and a sol-gel transition .

Hydrogels contain moisture, liquid substances, and possess excellent properties such as transparency, oxygen permeability, proper adhesion, wettability, excellent mechanical properties, shape stability, and flexibility due to capillary and osmotic pressure in the gel.

However, the hydrogel mask pack currently sold on the market has a problem that the essence is highly concentrated and gelled, so that it is difficult to handle and easily falls off from the slippery skin. In addition, the essence of the surface exposed to air and the phenomenon that the moisture is evaporated and dried may occur.

Therefore, there is a need to develop a new hydrogel mask pack that can satisfy the needs of consumers by overcoming the disadvantages of existing hydrogel mask packs.

Korean Patent No. 10-0506543 entitled " Thermosensitive state change hydrogel composition and method for producing the same ") comprises 1 to 10% by weight of a branched gel polymer, 0.5 to 5% by weight of an electrolytic gelated polymer, 0.5 to 5% by weight, natural biomaterial 1 to 10% by weight, polyhydric alcohol 3 to 30% by weight, functional additive 1 to 10% by weight and water 30 to 93% A thermosensitive state change hydrogel composition is described in which the hydrogel changes into a fluid state. However, mention is made here of a manufacturing method of applying a solution of alginic acid or alginate on a gelatin hydrogel layer and treating the aqueous solution containing divalent or trivalent cations or a salt thereof or an aqueous solution thereof to prepare a dual hydrogel mask pack none. Korean Patent No. 10-1372227 (entitled "Hydrogel mask having a surface hardened film and method for producing the same") discloses a hydrogel mask in which a composition for a mask body containing sodium alginate is coated on a lipophilic film A hydrogel mask for spraying a curing composition containing a divalent ion generating material onto the surface of the coated composition for a mask body to produce a cured film only on the surface of the composition for the mask body and a method for producing the same have. However, mention is made here of a manufacturing method of applying a solution of alginic acid or alginate on a gelatin hydrogel layer and treating the aqueous solution containing divalent or trivalent cations or a salt thereof or an aqueous solution thereof to prepare a dual hydrogel mask pack none.

It is an object of the present invention to develop and provide a method for producing a dual hydrogel mask pack by crosslinking an alginic acid gel on a gelatin hydrogel layer.

In order to accomplish the above object, the present invention provides a method for producing a gelatin hydrogel, comprising: (a) forming a gelatin hydrogel layer by gelatinizing an aqueous gelatin solution; And applying an aqueous solution of alginate or alginate on the gelatin hydrogel layer, treating an aqueous solution containing divalent or trivalent cations or a salt thereof or an aqueous solution thereof to induce gelation of alginic acid, (B) forming cross-linking between the gels. The present invention also provides a method for producing a dual-hydrogel mask pack.

Meanwhile, in the method for producing a dual hydrogel mask pack of the present invention, the gelatin aqueous solution may include, for example, liposome, natural extract, and an effective ingredient. At this time, the liposome may be encapsulated in nanoparticle size, preferably containing a functional ingredient.

Meanwhile, in the method for producing a dual hydrogel mask pack of the present invention, the gelatin aqueous solution preferably contains gelatin in an amount of 1 to 5% by weight. When the concentration of the gelatin is lower than the above range, the strength of the resultant gel is weak and the gel form can not be maintained at room temperature, resulting in an unstable state. When the concentration of the gelatin is higher than the above range, the crosslinking between double hydrogels (gelatin gel-alginate gel) This is not done properly.

Meanwhile, in the method for producing a dual hydrogel mask pack of the present invention, it is preferable that gelation of the gelatin aqueous solution is preferably carried out by exposing the gelatin aqueous solution to a temperature at which the gelatinization can proceed. The temperature at which gelation can proceed is generally known to be below 35 占 폚. The gelatin hydrogel layer formed by gelatinization of gelatin exhibits temperature sensitivity to be melted by skin temperature of 36.5 ° C when adhering to the skin.

The gelatin used in the present invention is a kind of induction protein obtained by extracting collagen, which is a natural protein constituting animal skin, tendon, cartilage, etc., from hot water or treating it with dilute alkali or dilute acid (partial hydrolysis) % Of glycine and amino acids. Gelatin has strong protective and colloidal properties, which emulsify or disperse fat, oil and water, and slowly swell in cold water to absorb 5 to 10 times the weight of gelatin . The molecular weight of gelatin is 15,000 ~ 250,000. Gelation does not occur at low concentration (0.2 ~ 0.5%) and can exist in gel form at 30 ~ 35 ℃. The hardness of the gelatin gel may be proportional to the concentration of the gelatin and the molecular weight of the gelatin.

On the other hand, in the method for producing a dual hydrogel mask pack of the present invention, the alginic acid or alginate aqueous solution preferably contains alginic acid in an amount of 1 to 10% by weight, more preferably 1 to 5% by weight good. Alginic acid or alginic acid is a fibrous component accounting for 20 to 30% of seaweed such as seaweed or sea tangle, and is known to have a molecular weight of about 1,300 to 1,600 as a polymer of two uronic acids (mannuronic acid + glycolic acid). The alginic acid or alginate may be, for example, sodium alginate.

On the other hand, in the method for producing a dual hydrogel mask pack of the present invention, the aqueous solution containing the salt of divalent or trivalent cations preferably contains 1 to 10% by weight of a divalent or trivalent cationic salt in the aqueous solution More preferably 1 to 5% by weight. When the above range is satisfied, sufficient crosslinking can be formed between the double hydrogels. Alginic acid or alginate does not form a crosslink when it is combined with a monovalent sodium ion or potassium ion, but it can form a crosslink when it meets a divalent or trivalent cation.

In the method for producing a dual hydrogel mask pack of the present invention, the divalent or trivalent cation may be any one selected from calcium, magnesium and aluminum, and the divalent cation salt may be, for example, calcium chloride calcium chloride (CaCl ₂ ) or calcium chloride dihydrate (CaCl ₂ .H ₂ O).

Meanwhile, in the method for producing a dual hydrogel mask pack according to the present invention, the cross-linking in the step (b) is preferably carried out on a gelatin hydrogel layer prepared from an aqueous solution containing 1 to 5% by weight of gelatin, It is preferable to apply an alginate-containing aqueous solution and then form an aqueous solution containing 1 to 5% by weight of a di- or trivalent cation salt.

Meanwhile, in the method for producing a dual hydrogel mask pack of the present invention, the cross-linking in the step (b) is preferably carried out in such a manner that the ratio of the aqueous solution containing 1 to 5% by weight of gelatin and the aqueous solution containing alginate of 1 to 5% Ratio is preferably 1: 1 to 1: 3, more preferably 1: 1 to 1: 2. When the above range is satisfied, sufficient crosslinking can be formed, and even if physical force is applied, it is not decomposed and can be continuously attached without slipping on the skin.

In the meantime, the 'hydrogel mask pack' of the present invention means a mask pack using a gel containing water as a dispersion medium in a dictionary meaning, unlike general cream or lotion preparations, prevents rapid evaporation of moisture and active ingredients The active ingredient can be delivered deep into the skin.

The double hydrogel mask pack prepared by the method of the present invention may have a thickness of 0.5 to 2 mm, for example, and the gel-type effective ingredient can be visually confirmed to be dissolved in the skin in response to the skin temperature.

The dual hydrogel mask pack of the present invention is formed with a gelatin hydrogel having temperature sensitivity so that the absorption rate of the effective ingredient in gelatin to the skin can be further increased and the alginic acid layer prevents direct exposure of the gelatin layer to air, It has a longer effective time, and has excellent effects on moisturizing and nutrient absorption.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart showing a process for manufacturing a dual hydrogel mask pack of the present invention.
2 is a mask pack frame used in the method for manufacturing a dual hydrogel mask pack of the present invention.
FIG. 3 is a schematic view showing a form in which alginic acid and gelatin used in the method for producing a dual hydrogel mask pack of the present invention are bound to a divalent metal ion.

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the scope of the present invention is not limited to the following embodiments, and includes modifications of equivalent technical ideas.

[Example 1: Preparation of dual hydrogel mask pack]

Gelatin was prepared in a 1% strength by weight aqueous solution. Thereafter, the gelatin aqueous solution was poured into a mask pack mold and stored in a refrigerator for 2 hours to form a mold and gel.

A 1% by weight aqueous solution of sodium alginate at a concentration of 2% by weight was applied on the gelled 1% by weight gelatin hydrogel, and a 3% by weight aqueous solution of calcium chloride was poured thereon for immersion. Thus, a double hydrogel mask pack of the present invention in which a gelatin hydrogel layer and a sodium alginate layer were cross-linked was prepared (see FIG. 1).

[Examples 2 to 7: Preparation of dual hydrogel mask pack]

In Examples 2 to 7, the gelatin concentration, the sodium alginate concentration, the concentration of the calcium chloride, and the binding ratio between the gelatin gel and the sodium alginate layer (the weight ratio of the gelatin aqueous solution to the sodium alginate aqueous solution) In the same manner, various double hydrogel mask packs were prepared by the same manufacturing method as in Example 1 above.

Calcium chloride concentration
(weight%) Gelatin concentration
(weight%) Alginic acid concentration
(weight%) Mixture weight ratio of gelatin aqueous solution and alginic acid aqueous solution Example 2 3 2 2 1: 1 Example 3 3 3 2 1: 1 Example 4 3 4 2 1: 1 Example 5 3 5 2 1: 1 Example 6 3 3 2 2: 1 Example 7 3 3 2 1: 2

[Experimental Example 1: Sensory evaluation of sensory properties of dual-hydrogel mask pack]

In this Experimental Example, the use results of the dual hydrogel mask packs prepared in Examples 1 to 7 were compared and evaluated. For 30 subjects, the "pack formability satisfaction", "stability of the gel (strength)" before use of the present invention mask pack, and "skin adhesion force" after using the mask pack for 30 minutes were evaluated.

The evaluation criteria were 1 (very unsatisfactory) to 5 (very satisfied), and the results are shown in Table 2 below.

Item
Pack Formulation Satisfaction Stability of gel (strength) Skin adhesion Remarks
Sensory evaluation grade Sensory evaluation grade Sensory evaluation grade Example 1 dissatisfaction 2 dissatisfaction 2 usually 3 Unstable at room temperature Example 2 usually 3 dissatisfaction 2 usually 3 Weak gel strength Example 3 satisfied 4 satisfied 4 usually 3 Example 4 dissatisfaction 2 satisfied 4 usually 3 Double pack formation
Instability Example 5 dissatisfaction 2 satisfied 4 usually 3 Double pack formation
Instability Example 6 satisfied 4 satisfied 4 very unsatisfied One Slip occurrence Example 7 satisfied 4 satisfied 4 satisfied 4

As a result of the sensory evaluation, in Example 1, the concentration of the gelatin aqueous solution was low and the strength of the gel was weak and there was no sense of stability, and it was difficult to maintain the shape of the hydrogel masks at room temperature.

In the case of Example 2, the gelatin hydrogel layer and the sodium alginate layer were crosslinked well but the strength of the gel was weak and there was no sense of stability.

In case of Example 3, crosslinking was well performed, and the strength of gel not torn when physical force was applied was shown. However, since the alginate layer remaining after rinsing the gelatin after using the mask pack is thin and slipping on the skin Respectively.

In Examples 4 and 5, since the concentration of gelatin was high, the calcium chloride could not pass through the gelatin layer and crosslinking was not properly performed.

In the case of Example 6, as the mixing ratio of gelatin increased, the amount of melting increased, and the skin slipped due to an excessive amount of sol when attached to the skin.

In the case of Example 7, the cross-linking was performed satisfactorily, the satisfaction of the pack formulation was high, the shape of the gel was stable, and the skin was attached continuously without slipping, so that the satisfaction of the subjects was high.

Claims (10)

(A) forming a gelatin hydrogel layer by gelatinizing an aqueous gelatin solution; And
An alginate or alginate aqueous solution is coated on the gelatin hydrogel layer, and a divalent or trivalent cation or a salt thereof or an aqueous solution containing them is treated to induce gelation of alginic acid, and gelatin hydrogel and alginic acid gel (B) forming a cross-link between the first hydrogel mask pack and the second hydrogel mask pack.
The method according to claim 1,
The gelatin aqueous solution,
Wherein the gelatin is contained in an amount of 1 to 5% by weight.
The method according to claim 1,
The gelatin aqueous solution may be gelatinized,
Wherein the gelatin aqueous solution is exposed to a temperature below the temperature at which the gelatinization proceeds so that the gelatinization proceeds.
The method according to claim 1,
The alginic acid or alginate aqueous solution may contain,
Wherein the alginic acid is contained in an amount of 1 to 10% by weight.
The method according to claim 1,
The alginate may be,
Characterized in that it is sodium alginate. ≪ RTI ID = 0.0 > 11. < / RTI >
The method according to claim 1,
The aqueous solution containing the salt of the divalent or trivalent cation is,
Wherein a divalent or trivalent cationic salt is added in an amount of 1 to 10% by weight in an aqueous solution.
The method according to claim 1,
The divalent or trivalent cation is, for example,
Calcium, magnesium, and aluminum. The method for manufacturing a dual-hydrogel mask pack according to claim 1,
The method according to claim 1,
The divalent cation salt may be, for example,
Wherein the calcium phosphate is calcium chloride (CaCl ₂ ) or calcium chloride dihydrate (CaCl ₂ .H ₂ O).
The method according to claim 1,
The cross-linking of step (b)
A gelatin hydrogel layer made of an aqueous solution containing 1 to 5% by weight of gelatin is coated with an aqueous solution containing an alginate in an amount of 1 to 5% by weight and then treated with an aqueous solution containing a divalent or trivalent cationic salt in an amount of 1 to 5% And forming a second hydrogel mask pack.
10. The method of claim 9,
The cross-linking of step (b)
Wherein the weight ratio of the aqueous gelatin-containing solution to the alginate-containing aqueous solution is 1: 1 to 1: 3.

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