KR101873336B1 - Method for preparing hydrogel pack comprising bioactive components of seaweed and hydrogel pack prepared thereby - Google Patents

Abstract

(A) heat extruding a seaweed seed to produce an extrudate of seaweed; (b) pulverizing the seaweed extrudate to produce seaweed powder; (c) mixing the seaweed powder with a water-soluble polymer and water to prepare a hydrogel composition; And (d) solidifying the hydrogel composition to prepare a hydrogel pack.
According to the method for producing a hydrogel pack according to the present invention, the seaweed extract is heat-extruded to produce a seaweed extrudate in which the fiber and various polymer polysaccharides contained in seaweed are mechanically decomposed, and the seaweed extrudate is prepared into a powder and introduced into a hydrogel pack , The amount of the functional active ingredient introduced into the skin is increased, so that a hydrogel pack having toxin discharge, skin moisturizing, soothing and whitening effect can be produced.

Description

[0001] The present invention relates to a process for preparing a hydrogel pack containing an active ingredient of seaweed, and a hydrogel pack prepared thereby,

The present invention relates to a method for producing a hydrogel pack containing an active ingredient of seaweed, and a hydrogel pack produced thereby.

Seaweed is a type of marine life that contains a large amount of various trace elements as well as general components such as proteins, lipids, and carbohydrates, compared with various plants that grow in the land environment.

The above-mentioned seaweeds specifically contain components exhibiting physiological activity depending on the type of seaweed, and various studies for utilizing them in various fields using seaweeds have been conducted recently.

For example, Capsosiphon fulvescens is a perennial green vegetation belonging to the reptilian thrips and perennials. In Korea, it lives mainly in the clean waters around the southern coast. It is known that moths have a wide range of physiological and chemical effects including antioxidant activity, antioxidant activity, immune stimulation, prevention of hepatotoxicity, improvement of lipid metabolism, and the like including a large amount of minerals, vitamins, proteins and amino acids.

As another example, the Ecklonia cava (Ecklonia cava or Enteromorpha prolifera) is galjo plant seaweed to a plant with the neck seaweed format in Jeju coastal water depth 10 m and out, and is a kind of polyphenol compounds in a flow articles rusinol (phloroglucinol) as building block Which contains a large amount of phlorotannin, has antithrombotic activity, antioxidant activity, cardiovascular protection and antiviral activity.

As another example, Enteromorpha prolifera is a plant belonging to a green algae family, and grows in various forms such as barnyardgrass and flatweed. It contains a large amount of potassium, iodine, calcium, saccharide and vitamin to treat diseases such as osteoporosis and gastric ulcer Is known to have efficacy.

As another example, the Codium fragile is a seaweed of the green algae of the hearing tree and is known to be effective in preventing adult diseases and obesity because it is rich in calcium, potassium, essential amino acids, vitamins and minerals.

The seaweed as described above contains a large amount of functional polymer polysaccharides such as hemicellulose, pectin, chlorophyll and the like and alginate, fucoidan, carrageenan, laminarin and the like to reduce skin irritation , Skin aging prevention, and whitening effect, and various studies are being conducted to utilize it as a raw material for cosmetics.

Conventionally, in order to introduce an effective ingredient contained in seaweeds into cosmetics, an effective ingredient of seaweed is extracted by a method such as irradiation with radiation, hot water extraction, enzyme treatment, or acid treatment to prepare a seaweed extract, It is used as raw material. However, there is a problem that it is difficult to introduce it into cosmetics due to the risk of radiation in the case of radiation, and there is a problem in that extraction efficiency is inferior in case of hot water extraction. In case of enzyme treatment or acid treatment, There is a problem that efficiency is lowered.

On the other hand, the hydrogel pack is a kind of functional cosmetic which is wrapped around the face and cleans the dirt of the pores and effectively supplies moisture and cosmetic ingredients to the skin, thereby restoring the skin physiological function by keeping blood circulation smooth. As the interest in improvement and skin beauty increases, it is being manufactured using various raw materials.

However, in the prior art, there has been no description of a process for producing a hydrogel pack using a seaweed starch and a seaweed starch so that an effective ingredient of the seaweed can be easily eluted.

Korean Patent Laid-Open No. 10-2012-0123869 (published on November 12, 2012) Korean Patent Laid-Open No. 10-2012-0000251 (Publication date: 2012.01.02) Korean Patent Laid-Open No. 10-2006-0017733 (published on February 27, 2006) Korean Patent Publication No. 10-2010-0082594 (published on July 19, 2010)

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in order to solve the problems of the prior art as described above, and an object of the present invention is to provide a hydrogel- To provide a technical content of a method for manufacturing a pack.

According to an aspect of the present invention, there is provided a method of producing a seaweed extract, comprising: (a) heat extruding a seaweed seed to produce an extrudate of seaweed; (b) pulverizing the seaweed extrudate to produce seaweed powder; (c) mixing the seaweed powder with a water-soluble polymer and water to prepare a hydrogel composition; And (d) solidifying the hydrogel composition to prepare a hydrogel pack.

In addition, the above-mentioned seaweeds are characterized in that they contain at least one species selected from the group consisting of seaweed, kelp, kelp, hearing and blue.

Also, the step (a) is performed at a temperature of 70 to 150 ° C.

The step (a) may further comprise the step of lyophilizing the seaweed extrudate after preparing the seaweed extrudate.

The hydrogel composition may further comprise 0.1 to 5% by weight of a seaweed powder, 2 to 10% by weight of a water-soluble polymer, and the balance water.

The present invention also provides a hydrogel pack prepared by the above-described method.

According to the method for producing a hydrogel pack according to the present invention, the seaweed extract is heat-extruded to produce a seaweed extrudate in which the fiber and various polymer polysaccharides contained in seaweed are mechanically decomposed, and the seaweed extrudate is prepared into a powder and introduced into a hydrogel pack , The amount of the functional active ingredient introduced into the skin is increased, so that a hydrogel pack having toxin discharge, skin moisturizing, soothing and whitening effect can be produced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram showing a method for producing a hydrogel according to the present invention. FIG.
Fig. 2 is a photograph of a photographed hu- midi gel pack prepared by the method according to Example 1. Fig.
FIG. 3 is a photograph of a patchy hydrogel pack prepared by the method according to Example 3. FIG.
4 is an actual image of a tuna hydrogel pack prepared by the method according to Example 4. Fig.

Hereinafter, the present invention will be described in detail.

The present invention relates to a method for producing a seaweed extrudate, comprising the steps of: (a) extruding a seaweed starter to produce a seaweed extrudate; (b) pulverizing the seaweed extrudate to produce seaweed powder; (c) mixing the seaweed powder with a water-soluble polymer and water to prepare a hydrogel composition; And (d) solidifying the hydrogel composition to prepare a hydrogel pack.

The step (a) is a step of extruding a seaweed seed to produce an extrudate of seaweed.

The seaweed seeds may be derived from algae such as alginate, fucoidan, carrageenan, laminarin, porphyran and the like, such as seaweed, kelp, kelp, As long as it contains a large amount of the functional polysaccharide, it can be used without limitation, and preferably, a mash can be used.

The seaweeds described above may be used in various forms such as fiber such as cellulose or hemicellulose for forming cell walls of seaweed, functional polymer polysaccharides such as viscous alginic acid, fucoidan, carrageenan, and poplan, and storage polysaccharides such as laminarin or starch . However, since the functional polymer polysaccharide contained in the seaweed has a high molecular weight, the hydrogel pack becomes stiff when it is introduced into the hydrogel pack, so that it is difficult to apply a smooth texture of the hydrogel pack and thus it is difficult to apply to the skin. There is a problem that introduction of the pack into the skin is difficult due to the high molecular weight of the functional polymer polysaccharide.

Accordingly, in order to solve the above problems, the present invention provides a method of effectively decomposing functional polysaccharides such as alginic acid, fucoidan, carrageenan, and poplan, and fibers contained in seaweeds contained in seaweeds by heat- , It is possible to realize a smooth texture when introduced into a hydrogel pack, as well as to lower the molecular weight of the functional polymer polysaccharide and effectively elute the various active ingredients contained in the cell wall to increase the water solubility, To thereby obtain a hydrogel pack having excellent functionality.

Such a heat extrusion process is advantageous in that the seaweed gypsum can be mixed, cut, crushed, pressed, formed, expanded, dried, sterilized, etc. at a high temperature and a high pressure for a short time under physical shear force It is an optimal process for commercialization and materialization of seaweed by utilizing seaweed as cosmetics.

The heat extrusion process can be carried out using various types of extrusion molding machines commonly used, such as a biaxial extrusion molding machine. The water extrusion molding machine can be used to control the moisture content of seaweeds, the temperature control of the extruder barrel part, the shear force according to the arrangement of the screw, The physical and chemical properties of the seaweed extrudate can be controlled by controlling various factors such as speed, diameter of the extrusion die, and the like.

The heat extrusion process may be carried out at a temperature of 70 to 150 ° C. When the heat extrusion process is performed at a temperature of less than 70 ° C., it is difficult to destroy the cell wall fiber of the primordium and the low molecular weight functional polymer polysaccharide And if it is carried out at a temperature exceeding 150 ° C, a component which can induce skin irritation by inducing carbonization of the primordium may be produced, which makes it difficult to introduce it into the skin.

In the heat extrusion step, it is preferable that the screw of the extruder is rotated at a speed of 100 to 300 rpm to heat extrude the seed of the seaweed, and it is preferable to produce the seaweed extrudate through an extrusion die having a diameter of 1 to 3 mm Do.

In addition, it is preferable to use the seaweed starch having a moisture content in the range of 20 to 40%. If the moisture content is less than 20%, there is a problem that the extrusion temperature is excessively increased. When the moisture content exceeds 40% It is difficult to transfer mechanical energy to the cell wall of seaweed because of its high moisture content.

In addition, the present step may further include a step of drying the seaweed extrudate after preparing the extrudate of the seaweed, and the drying may be carried out by a conventional method such as hot air drying or freeze drying. Preferably, by freezing and decompressing the seaweed extrudate, the freeze-drying method of sublimating the ice present in the seaweed extrudate to remove water is used to produce a stable seaweed extrudate without destroying the various active ingredients contained in the seaweed can do.

The step (b) may be a step of pulverizing the seaweed extrudate to produce a seaweed powder, wherein the seaweed extrudate is pulverized to produce a powder having a size capable of effectively eluting an effective ingredient upon introduction into the hydrogel pack .

The process for producing the powder may be carried out by a conventional method such as ball milling and the like, but the present invention is not limited thereto, and the seaweed extrudate may be pulverized by various methods to produce a powder, preferably 1 to 500 탆 Of the average particle size of the hydrogel pack, so that a hydrogel pack in which the seaweed powder is dispersed homogeneously with less aggregation can be produced.

The step (c) is a step of mixing the seaweed powder with a water-soluble polymer and water to prepare a hydrogel composition. In this step, the seaweed powder and the water-soluble polymer are mixed with water heated to 50 to 90 ° C , And they are mixed for a sufficient time to prepare a hydrogel composition in which the seaweed powder and the water-soluble polymer are homogeneously mixed.

The hydrogel composition may be composed of 0.1 to 5% by weight of a seaweed powder, 2 to 10% by weight of a water-soluble polymer and the balance of water, and the hydrogel composition may be prepared.

When the content of the seaweed powder is less than 0.1% by weight, the amount of effective components such as polysaccharides contained in algae contained in the seaweed and the amount of minerals such as vitamins and metals are small, and the amount of the toxins such as toxins, skin moisturizing, soothing and whitening effects The effect of improving the skin care is insignificant, and when it exceeds 5% by weight, the skin care improving effect is not further enhanced.

When the water-soluble polymer is filled in a lattice of the polymer, the water-soluble polymer maintains a swollen three-dimensional structure and can exhibit characteristics of a gel corresponding to an intermediate form of a liquid and a solid that maintains a stable shape after swelling, It can be used effectively when manufacturing gel packs.

The water-soluble polymer may be at least one selected from the group consisting of bio-cellulose, gelatin,? -Lactoglobulin, whey, soy protein, potato protein, hazelnut protein, wheat protein, poly-L-lysine, casein, casein, soybean glycine, Cellulose derivatives such as starch, methylcellulose, ethylcellulose, hydroxypropylmethylcellulose, cellulose nitrate, carboxymethylcellulose, gum arabic, xanthan gum, mesquat gum, guar gum, carrageenin, tragacanth gum, arabinogalactan, gal Hydroxypropylmethylcellulose acetate succinate, polyvinylacetate phthalate, poly (p-dioxanone), poly (beta -dioxanone), lactose, lactose, lactam mannan, pectin, agar, dextran, chitosan, zein, hydroxypropyl methylcellulose phthalate, -Valerolactone), poly (? -Hydroxybutyrate), poly (? -Hydroxybutyrate) and? -Hydroxyvalerate copolymers, Poly (? -Hydroxypropionate), methyl acrylate copolymer, dimethylaminoethyl methacrylate copolymer, trimethylammonium ethyl methacrylate copolymer, polymers and copolymers of lactic acid and glycolic acid, lactic acid and glycolic acid and polyethylene A polymer and a copolymer of glycols or a mixture thereof can be used. Preferably, a bio-cellulose or a fermented bio-cellulose made of a natural material is used, and a hydrogel having both excellent adhesion of a natural material and low- Pack can be manufactured.

Alternatively, a water-soluble polymer such as polyacrylic acid, sodium polyacrylate, polyacrylamide, polyvinyl alcohol, polyvinyl pyrrolidone or a mixture thereof can be used.

Further, the hydrogel composition may further comprise at least one additive selected from the group consisting of a whitening agent, a wrinkle remover, a moisturizer, a nutrient, a surfactant, an antiseptic, and a perfume, , Preferably 0.5 to 10% by weight based on the total weight of the hydrogel composition, and can be appropriately adjusted as needed.

The whitening agent can be constituted to exhibit a whitening effect when the hydrogel pack is worn using arbutin, ethyl ascorbyl ether, ascorbyl glucoside, niacinamide, alpha-bisabolol, ascorbyl tetraisopalmitate or a mixture thereof.

The wrinkle remover may be configured to exhibit a wrinkle-reducing effect when the hydrogel pack is worn using retinyl palmitate, retinol, adenosine, or a mixture thereof.

The moisturizing agent may be plant-derived carrageenan, arginine, sorbitol, glycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, amino acids, peptides or a mixture thereof. When the hydrogel pack is worn, Can be configured to exhibit enhanced moisturizing and soothing effects.

The nutrient may be selected from aloe vera extract, chamomile extract, grape seed oil, sunflower seed oil or a mixture thereof, and may be constituted so as to exhibit an effect of supplying sufficient nutrients to the skin when the hydrogel pack is worn.

The surfactant may be polysorbate 20, 40, 80, rubolol W or the like commonly used for cosmetics, and phenoxyethanol may be used as a preservative.

In addition, the hydrogel composition can be imparted with a fragrance to the hydrogel pack using various fragrances which are conventionally used, and it can be constituted so as to include natural essential oil so as to minimize skin irritation, Pigments, natural pigments, and the like that can impart colors to impart aesthetics and beautiful colors to the surface of the substrate.

Further, in this step, the step of adjusting the hydrogen ion concentration of the hydrogel pack from pH 5 to pH 6 may be additionally provided, so that irritation to the skin can be minimized even if it is used by users of various skin types.

The step (d) is a step of preparing a hydrogel pack by solidifying the hydrogel composition. In this step, a hydrogel pack having a stable three-dimensional structure can be produced by inducing aggregation in the hydrogel composition, The hydrogel pack may be molded into various shapes and then commercialized to produce a commercially available hydrogel pack.

For example, the hydrogel pack may be prepared by supplying the hydrogel composition heated at a temperature of 50 to 90 DEG C to a mold having a specific shape for preparing a pack, then cooling the hydrogel composition to extract a bulk hydrogel of a predetermined size, The extracted bulk hydrogel may be molded to produce a hydrogel pack having a specific shape and having a thickness of 1 to 5 mm.

Therefore, the hydrogel packs having various sizes and shapes can be manufactured using the above-described method. The hydrogel packs thus manufactured can be used as mask packs having a skin-beauty improving effect such as toxin discharge, skin moisturizing, soothing and whitening effect, Eye patches, nail patches, lip patches, body patches, neck patches, elbow patches, or partial patches applied to specific areas.

According to the method for producing a hydrogel pack according to the present invention as described above, a seaweed extract is heated and extruded to mechanically decompose the fiber and various polymer polysaccharides contained in seaweed to produce a seaweed extrudate, The introduction of the functional active ingredient to the skin is increased by a simple process of introducing into the gel pack, so that a hydrogel pack excellent in toxin release, skin moisturizing, soothing and whitening effect can be produced.

The present invention also provides a hydrogel pack prepared by the above-described method.

The hydrogel pack according to the present invention contains a large amount of functional polymer polysaccharides such as alginic acid, carrageenan and the like and various active ingredients. The functional polymer polysaccharide is decomposed into small molecules and is easily introduced into the skin, And a whitening effect. Since natural products are used as an effective ingredient, there is little irritation on the skin, and thus it can be effectively used for improving skin beauty.

The hydrogel pack according to the present invention may be formed to a thickness of 1 to 5 mm. When the hydrogel pack is formed to a thickness of 1 mm or less, it is difficult to impart sufficient mechanical strength to the hydrogel pack, If formed, the weight of the hydrogel pack attached to the skin may increase, which may increase the burden.

The hydrogel pack may further include a release film layer formed on the other side of the hydrogel matrix (i.e., the skin attachment surface of the hydrogel pack) to protect the skin attachment surface of the hydrogel pack to which the support layer is bonded And the release film layer may be formed by forming a release film layer using a conventional release film such as a polyethylene film (PET film) or a polypropylene film such as CPP to protect the skin adhesion surface of the hydrogel pack.

Hereinafter, the present invention will be described in more detail with reference to examples.

The embodiments presented are only a concrete example of the present invention and are not intended to limit the scope of the present invention.

≪ Example 1 >

(1) Production of granulated extruded powder

50 kg of the seeds were purchased and washed several times with water. The dried seedlings were dried at room temperature for 2 days or more to obtain dried seedlings having a water content of 10 to 50%, respectively.

The temperature of the barrel portion was heated to 90 DEG C, and the screw was rotated at 150 rpm / minute. The dried seed powder (moisture content 20%) was fed into a twin screw extruder (length / diameter ratio of 15: Extruded through an extrusion die having a diameter of 2 mm to produce an extrudate. The prepared extrudate was charged in a ball milling machine and pulverized at 500 rpm for 1 hour to prepare a uniform extruded powder having an average particle size of 50 탆.

(2) Preparation of hydrogel composition

Sorbitol and gelatin were supplied to water heated to 80 占 폚 and mixed to prepare a first mixture. 1% by weight of plant-derived carrageenan, 1.3% by weight of carob bean gum and 0.7% by weight of xanthan gum were wetted to 5% by weight of glycerin and mixed into the first mixture and stirred for a sufficient time to prepare a second mixture. 0.5% by weight of powdery extrudate powder and 0.03% by weight of arginine were added to the second mixture thus prepared, followed by thorough stirring while maintaining the temperature constant to prepare a mixed aqueous hydrogel composition.

(3) Preparation of hydrogel pack

The obtained hydrogel composition was supplied to a mold having a mask pack shape, and then the hydrogel composition was cooled to extract a bulk hydrogel of a predetermined size. The extracted bulk hydrogel was molded to form a granular hydrogel having a mask shape with a thickness of 2 mm Gel pack (see Fig. 2).

≪ Example 2 >

The dried hydrate gel pack was prepared in the same manner as in Example 1, except that the dried seedlings were heated to 130 캜 to produce a bulky extrudate.

≪ Example 3 >

The coculture extrudate powder was prepared in the same manner as in Example 1 except that the citron powder was used, and 0.5 wt% of the cocoon extrudate powder was mixed with water heated to 60 DEG C to prepare a mixture, and the plant-derived carrageenan 1.3 1% by weight of carob bean gum, and 0.7% by weight of xanthan gum were added thereto, followed by stirring to prepare a hydrogel composition.

The hydrogel compositions thus prepared were prepared in the same manner as in Example 1 (see Fig. 3).

<Example 4>

The kelp extrudate powder was prepared in the same manner as in Example 3 except that the kelp gypsum powder was used, and a tangle hydrogel pack was prepared using the same (see Fig. 4).

&Lt; Comparative Example 1 &

A hydrogel pack was prepared in the same manner as in Example 1, except that the dried seed powder was heated at 160 캜 to produce an extrudate.

&Lt; Comparative Example 2 &

A hydrogel pack was prepared in the same manner as in Example 1, except that the dried seed powder was heated at 60 占 폚 to prepare a granulated extrudate.

&Lt; Comparative Example 3 &

A hydrogel pack was prepared in the same manner as in Example 1, except that the dried seaweed powder was pulverized by a ball milling method.

<Experimental Example 1> Effect of extrusion temperature on the compositional change of seaweed powder

In order to analyze the effect of the extrusion temperature on the compositional change of the seaweed powder in the hot extrusion process, the component analysis was performed using the powder of seaweed extrudate prepared by the method according to Example 1, Example 2 and Comparative Example 1 , Phenol and benzopyrene were not detected in the powder of the seaweed extrudate prepared by the method according to Examples 1 and 2, but a trace amount of phenol and benzoprene was detected in the seaweed extrudate powder prepared by the method according to Comparative Example 2, Lt; RTI ID = 0.0 &gt; 160 C. &lt; / RTI &gt;

Further, 1 g of the prepared seaweed extrudate powder was dissolved in 40 mL of an aqueous solution containing 1% Na ₂ CO ₃ , followed by centrifugation. The supernatant was separated, precipitated by adding ethanol to the supernatant, The precipitate was recovered and the precipitate was dried to determine the content of alginic acid. As a result, it was confirmed that 0.21 and 0.23 g, respectively, were obtained when the seaweed extrudate powder prepared by the method according to Examples 1 and 2 was used, while the seaweed extrudate powder prepared by the method according to Comparative Example 2 , It was confirmed that the alginate content was 0.15 g, and the extraction rate of alginic acid was increased by the extrusion. As a result, it was confirmed that the extrusion temperature had a significant effect on the alginate extraction rate.

&Lt; Experimental Example 2 > Analysis of skin improving effect of hydrogel pack

In order to analyze the skin-improving effect of the hydrogel pack prepared by the method according to Example 2 and Comparative Example 3, changes in the skin condition before and after wearing the hydrogel pack were analyzed, and the analysis was performed using a statistical analysis method Respectively.

(1) Effect of water supply

To analyze the moisture content of the skin, two subjects were rinsed with the same cleansing agent for a certain period of time and the forearm between the right cuff and the elbow was cleaned and allowed to stand for 30 minutes at room temperature (40 to 60%) . Thereafter, the moisture content before and after wearing the hydrogel pack was measured, and the moisturizing effect of the hydrogel pack was analyzed using a skin tester (New APHRIDITE).

As a result of measuring the water content of the test subjects, the moisture content of the skin before wearing the hydrogel pack was 56.3 ± 4.6 and 57 ± 3.9, respectively.

The hydrogel packs prepared according to the method of Example 2 and Comparative Example 3 were attached for 15 minutes and the hydrogel packs were removed from the skin. The moisture of the skin was measured. As a result, the hydrogel packs according to Comparative Example 3 The moisture levels of the subjects were 69.3 ± 7.2. On the other hand, the moisture levels of the test subjects to which the hydrogel pack according to Example 2 was attached were 76.8 ± 6.8, respectively. Thus, it was confirmed that the hydrogel pack prepared by the method according to Example 2 had better moisturizing effect I could confirm.

(2) Sensory effect

Sensory tests were performed to analyze the feeling of use of the hydrogel packs prepared by the method according to Example 2 and Comparative Example 3.

30 subjects were selected, and after using the manufactured hydrogel pack, the average value calculated by repeating 2 times with the 5-point scoring method was rounded off for the feeling of adhesion, softness, moisturizing feeling after use, and overall satisfaction of the hydrogel pack.

The results of sensory evaluation of the hydrogel pack according to the present invention are shown in Table 1 below.

As shown in Table 1, the hydrogel packs prepared by the method according to Example 2 showed that the various kinds of fibers and functional polysaccharides contained in seaweeds were low-molecular-weight and thus, compared with the hydrogel packs prepared by the method according to Comparative Example 3 Smooth, and moisturizing effect, and thus it can be effectively used as a pack for improving skin beauty.

Claims (6)

(a) preparing a seaweed extrudate by hot-extruding at least one seaweed source selected from the group consisting of seaweed, kelp, kelp, audible and parasitic at a temperature of 90 to 130 캜;
(b) pulverizing the seaweed extrudate to produce seaweed powder;
(c) mixing 0.1 to 5% by weight of the seaweed powder with 2 to 10% by weight of the water-soluble polymer and the remaining water to prepare a hydrogel composition; And
(d) solidifying the hydrogel composition to produce a hydrogel pack;
&Lt; / RTI &gt; delete delete The method according to claim 1,
Wherein the step (a) further comprises a step of lyophilizing the extrudate of the seaweed after preparing the extrudate of the seaweed. delete A hydrogel pack prepared by the method according to any one of claims 1 to 4.

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