KR101998266B1 - Egg-shell coating compositions, and eggs coated therewith, an egg-shell coating method using the same, and a method of maintaining egg freshness using the same - Google Patents

Abstract

The present invention relates to an eggshell coating composition comprising: a water-soluble polysaccharide polymer; a polyphenol-based compound; a water-soluble calcium salt and a water-soluble transition metal salt, to an egg coated with the eggshell coating composition, to an eggshell coating method using the eggshell coating composition, and to an egg freshness maintaining method using the eggshell coating composition.

Description

[0001] The present invention relates to egg shell coating compositions, egg coated eggs, egg shell coating methods using the egg shell coating compositions, egg-shell coating compositions, and egg-shell coating methods using same, freshness using the same}

The present invention relates to an egg shell coating composition, an egg coated with the egg shell, a egg shell coating method using the egg shell coating composition, and a method of maintaining egg yolk using the egg shell coating composition.

Eggs are a very important source of protein in the diet and their consumption is a constant source of livestock food.

Eggs are formed on the egg shell surface by the cuticle membrane, which is a unique antimicrobial substance when the eggs are scattered from the mother line, to prevent pathogenic bacteria from penetrating into the eggs. However, it is known that eggshell surface is contaminated by the outbreak pathogens such as Salmonella, Escherichia coli, Enterobacter, Klesiella, have.

Due to the risk of such pathogenic bacteria and hygiene problems, it is subjected to washing and sterilization processes. In this process, the cuticle membrane is easily dissolved and becomes vulnerable to pathogenic bacteria, which may be a risk factor for the safety and the safety of eggs .

Therefore, some egg supplier tried to improve the egg line by cleaning the surface of the egg shell with the brush without washing the eggshell with water etc. However, as described above, in this case, pathogenic bacteria remain on the egg shell surface, And hygiene problems.

Korean Patent Laid-Open Publication No. 2017-0127823 discloses a technique for removing pathogenic bacteria present on egg shell surfaces by irradiation with gamma rays. However, in order to maintain the egg lead by chitosan, gamma irradiation must be used, Even when coated with fucitc acid, there is a problem that the lead maintenance period of eggs is not long.

On the other hand, a method of coating fluid paraffin and mineral oil on egg shells has been introduced. In this case, however, pathogenic bacteria are not removed, so bacteria remain on the surface of eggs. Moreover, Therefore, it is necessary to develop a new coating method.

Accordingly, the present applicant has accomplished the present invention as a result of repeated efforts to develop egg shell coating compositions capable of maintaining the leading of eggs for a long period of time and substantially completely removing pathogenic bacteria remaining on the surface of eggs.

Korean Patent Publication No. 10-2017-0127823 (Nov. 21, 2017)

In order to solve the above-mentioned problems, the present invention provides a method for improving the freshness of a long-term egg by 50 H.U. Egg shell coating method, egg shell coating method and egg shell coating method using the same, egg shell coating composition, egg shell coating composition, egg shell coating method and egg yolk coating composition And a method for maintaining the same.

One aspect of the present invention for achieving the above object is an egg shell coating composition comprising a water-soluble polysaccharide polymer, a polyphenolic compound, a water-soluble calcium salt, and a water-soluble transition metal salt.

In one embodiment, the water soluble polysaccharide polymer comprises a cationic polysaccharide polymer; (C 1 -C 6) alkylamino (C 1 -C 6) alkanoic acid, and mixtures thereof. The cationic polysaccharide polymer may be selected from the group consisting of chitosan, chitin, (C 1 -C 6) alkylamino (C1-C6) alkylamino (C1-C6) alkyldextran and salts thereof, and the natural gums may be selected from the group consisting of gum arabic, gatifi gum, guar gum One or two selected from the group consisting of gum, xanthan gum, gellan gum, tara gum, konjac gum, karaya gum, tamarind gum, tragacanth gum, locust bean gum, carrageenan, persellaran, curdlan and gellan Wherein the anionic polysaccharide polymer is selected from the group consisting of alginic acid, pectin, carrageenan, hyaluronic acid, carboxy (C 1 -C 6) alkylcellulose, sulfo (C 1 -C 6) alkylcellulose carboxy (C1-C6) alkyl cellulose, carboxy (C1-C6) alkylsulfo (C1-C6) alkylcellulose, hydroxy (C1- Dextran sulfate, dextrin sulfate, salts thereof, and the like, or a mixture of two or more thereof.

In one embodiment, the egg shell coating composition comprises 0.01 to 5 wt% of a water soluble polysaccharide polymer, 0.005 to 1 wt% of a polyphenolic compound, 0.001 to 0.5 wt% of a water soluble transition metal salt, 0.01 to 0.5 wt% of a water soluble calcium salt To 5% by weight, and the balance of water, wherein the water-soluble polysaccharide polymer is selected from the group consisting of cationic polysaccharide polymers: natural gums and anionic polysaccharide polymers in a ratio of 1: 0.1 to 1: 10 by weight.

In one embodiment, the polyphenol compound may be a tannin compound, a flavonoid compound, or a mixture thereof, and the tannin compound may include tannic acid, gallotannin, ellagitannins, Or a mixture thereof; A condensed tannin compound which is a polymer of a flavonoid compound; Or a mixture thereof, and the flavonoid compound may be any one or a mixture of two or more selected from the group consisting of flavone, isoflavone, flavonol, flavanone, flavanol, flavanol, and anthocyanidin have.

In one embodiment, the metal of the water-soluble transition metal salt is selected from the group consisting of aluminum (Al), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel And may be any one or a mixture of two or more selected from the group consisting of copper (Cu), zinc (Zn), zirconium (Zr), molybdenum (Mo), ruthenium (Ru), rhodium (Rh), cadmium More specifically, the water-soluble transition metal salt is at least one selected from the group consisting of magnesium acetate, magnesium carbonate, magnesium chloride, magnesium gluconate, magnesium hydroxide, magnesium oxide, magnesium sulfate, ferric gluconate, ferrous fumarate, ferrous lactate, ferrous sulfate, Ammonium sulfate, iron phosphate, ferric pyrophosphate, sodium ferric pyrophosphate, copper gluconate, copper sulfate, zinc acetate, zinc chloride, zinc gluconate, zinc oxide, zinc carbonate, zinc sulfate, manganese chloride, manganese gluconate, Chromium and ammonium molybdate Or a mixture of two or more thereof.

In one embodiment, the water-soluble calcium salt may be any one or a mixture of two or more selected from the group consisting of calcium chloride, calcium hydroxide, calcium nitrate, calcium phosphate, calcium acetate, calcium citrate, calcium lactate and calcium gluconate.

In one embodiment, the egg shell coating composition may further comprise at least one selected from the group consisting of a plasticizer and an antioxidant, wherein the egg shell coating composition comprises 0.1 to 5% by weight of a plasticizer in 100% by weight of the egg shell coating composition, And 0.005 to 1% by weight of an antioxidant. The plasticizer may be selected from the group consisting of sorbitol, mannitol, glycerol, polyethylene glycol, propylene glycol, triethyl citrate, butyl citrate, acetyl triethyl citrate, acetyl tributyl citrate, diacetyl monoglyceride and diethyl phthalate Lt; / RTI > may be any one or a mixture of two or more selected from the group; The antioxidant may be any one or a mixture of two or more selected from the group consisting of ascorbic acid, isoarsorbic acid, erythorbic acid, glutathione and carotenoid.

Still another aspect of the present invention relates to an egg coated with the egg shell coating composition.

Still another aspect of the present invention relates to an egg shell coating method comprising preparing a coating solution comprising the egg shell coating composition, and spraying or dipping the coating solution into egg shell and drying.

In yet another embodiment, the spray may be sprayed and sprayed through a plurality of nozzles in the upper and lower directions of the egg shell.

Yet another aspect of the present invention relates to a method of maintaining an egg line comprising coating an egg shell surface of the egg with the egg shell coating composition.

The egg shell coating composition according to the present invention is coated on the surface of an egg in place of the cuticle membrane removed in an egg washing process, so that the freshness of the egg for a long period of time is maintained at 50 H.U. Or more.

In addition, the antibacterial effect of the polyphenol contained in the egg shell coating composition is utilized to impart an antibacterial effect to the egg, thereby removing the pathogenic bacteria remaining on the surface of the egg.

FIG. 1 illustrates an apparatus for spraying an egg shell coating composition through a plurality of nozzles in an upper and lower direction to coat the surface of an egg according to an embodiment of the present invention,
2 is a photograph of an egg analyzer for measuring the HU value of eggs,
Fig. 3 shows the results of testing the antimicrobial activity of egg shell coating compositions using E. coli. Fig. 3 (a) is a control group without any treatment. Fig. 3 (b)

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, egg shell coating compositions according to the present invention, eggs coated with egg shells, egg shell coating methods using the egg shell coatings, and egg retention methods using the same will be described in detail with reference to the accompanying drawings. The following drawings are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the following drawings, but may be embodied in other forms, and the following drawings may be exaggerated in order to clarify the spirit of the present invention. Also, throughout the specification, like reference numerals designate like elements.

Hereinafter, the technical and scientific terms used herein will be understood by those skilled in the art without departing from the scope of the present invention. Descriptions of known functions and configurations that may be unnecessarily blurred are omitted.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements.

As described above, the egg is washed and sterilized due to the risk of pathogenic bacteria and hygiene problems. In this process, the cuticle membrane is easily dissolved and becomes vulnerable to pathogenic bacteria, which is a factor threatening the safety and the safety of eggs .

In order to overcome this problem, it was tried to improve the egg line by cleaning the surface of egg shell with brush and keeping cuticle membrane without washing egg shell with water etc. However, there is a problem in safety and hygiene due to the presence of pathogenic bacteria on egg shell surface . On the other hand, although a method of coating egg shell with limited coating composition may be considered, there is still a problem that the pathogenic bacteria are not completely removed, and when the egg shell is completely washed, the pathogenic bacteria can be removed, There has been a lack of.

As a result of repeated efforts to develop an egg shell coating composition capable of maintaining the leading of eggs for a long period of time and substantially completely removing the pathogenic bacteria remaining on the surface of eggs, the present applicant has found that water soluble polysaccharide polymers, polyphenolic compounds, Calcium salt and a water-soluble transition metal salt, it is possible to suppress the elimination and penetration of pathogenic bacteria and keep the egg line, and thus the present invention has been completed.

Specifically, the present invention provides an egg shell coating composition, wherein the egg shell coating composition comprises a water soluble polysaccharide polymer, a polyphenolic compound, a water soluble calcium salt, and a water soluble transition metal salt.

When coating the surface of the egg including the egg shell coating composition in such a combination, the freshness of the egg for a long period of time at room temperature was increased to 50 H.U. Or more. In addition, the antibacterial effect of the polyphenol contained in the egg shell coating composition is utilized to impart an antibacterial effect to the egg, thereby removing the pathogenic bacteria remaining on the surface of the egg. At this time, the room temperature may vary depending on the season, and may be from 15 to 40 캜.

Hereinafter, each component of the egg shell coating composition according to an example of the present invention will be described in more detail.

First, the water-soluble polysaccharide polymer according to an embodiment of the present invention includes a cationic polysaccharide polymer; And a mixture of natural gums and anionic polysaccharide polymers selected from the group consisting of natural gums and anionic polysaccharide polymers. By using a cationic polysaccharide polymer and an anionic natural gum or anionic polysaccharide polymer together, the egg shell coating composition can be effectively coated on the egg surface, i.e. the egg shell, through complex coacervation based on ionic crosslinking.

In one embodiment of the present invention, the cationic polysaccharide polymer is not particularly limited as long as it is a polysaccharide polymer having a cationic property, and may be preferably a natural cationic polysaccharide polymer. In one specific example, the cationic polysaccharide polymer is selected from the group consisting of chitosan, chitin, (C1-C6) alkylamino (C1-C6) alkylcellulose, (C1- C6) alkylamino Or a mixture of two or more selected from the group consisting of Most preferably, the cationic polysaccharide polymer may be chitosan. Chitosan is capable of forming a complex coracervate with natural gum or anionic polysaccharide polymer, so that it can improve coatability. It also has antimicrobial effect, so it can effectively remove pathogenic bacteria by antibacterial action with polyphenol .

The cationic polysaccharide polymer according to an exemplary embodiment of the present invention may have an average molecular weight of 10,000 to 400,000 g / mol, more preferably 15,000 to 200,000 g / mol, even more preferably 20,000 to 100,000 g / mol, 50,000 g / mol. In such a range, the coating with the natural core or the anionic polysaccharide polymer and the polyelectrolyte complexes can be effectively performed. In particular, when chitosan is used as the cationic polysaccharide polymer, the average molecular weight of the chitosan may be 20,000 to 50,000 g / mol, and the antimicrobial activity may be better in the above range.

In one embodiment of the present invention, the natural gums may have an anionic property and may be used without any particular limitation as long as they are commonly used. Specific examples thereof include gum arabic, gothic gum, guar gum, xanthan gum, It may be any one or a mixture of two or more selected from the group consisting of tarragon, konjac gum, karaya gum, tamarind gum, tragacanth gum, locust bean gum, carrageenan, perselllan, But is not limited thereto.

The natural gums according to an exemplary embodiment of the present invention may have an average molecular weight of 100,000 to 500,000 g / mol, more preferably 150,000 to 400,000 g / mol, and still more preferably 200,000 to 300,000 g / mol. In such a range, the cationic polysaccharide polymer and the polyelectrolyte complexes are formed, and coating by the composite core-annealing can be effectively performed.

In one embodiment of the present invention, the anionic polysaccharide polymer may be a polysaccharide polymer having an anionic property without particular limitation, and may be a natural anionic polysaccharide polymer. In one specific example, the anionic polysaccharide polymer is selected from the group consisting of alginic acid, pectin, carrageenan, hyaluronic acid, carboxy (C 1 -C 6) alkylcellulose, sulfo (C 1 -C 6) alkylcellulose carboxy (C 1 -C 6) alkylhydroxy (C1-C6) alkyl sulfates (C1-C6) alkyl cellulose, cellulose sulfates, cellulose phosphates, chondroitin sulfate, dextran sulfate, dextrin Sulfates, salts thereof, and the like, but is not limited thereto.

The anionic polysaccharide polymer according to an exemplary embodiment of the present invention may have an average molecular weight of 50,000 to 1,000,000 g / mol, more preferably 100,000 to 800,000 g / mol, and still more preferably 200,000 to 500,000 g / mol. In such a range, the cationic polysaccharide polymer and the polyelectrolyte complexes are formed, and coating by the composite core-annealing can be effectively performed.

In one embodiment of the present invention, the polyphenol compound is a substance that forms a complex with a water-soluble transition metal salt through a coordination bond, thereby effectively coating the egg shell coating composition on the egg shell, wherein the polyphenol compound is a tannin compound , A flavonoid-based compound, or a mixture thereof. Such a tannin compound or a flavonoid compound has a plurality of hydroxyl groups (-OH) and can have an excellent antibacterial activity, thereby improving the safety and hygiene of the eggs coated with the egg shell coating composition.

More specifically, the tannin compounds according to one embodiment of the present invention include tannic acid, gallotannin, ellagitannins, or a mixture thereof, hydrolyzable tannin compounds; A condensed tannin compound which is a polymer of a flavonoid compound; Or a mixture thereof.

The flavonoid-based compounds according to an exemplary embodiment of the present invention may be flavonoids such as flavone, isoflavone, flavonol, flavanone, flavanol, flavanonol, Anthocyanidin, and the like. More specific examples of the compound include flavones such as luteolin, apigenin, or tangeritin, and the like. , Isoflavones may be daidzein, genistein or glycitein and the flavonols may be quercetin, kaempferol, myricetin, fisetin, ), Galangin, isorhamnetin, pachypodol, rhamnazin, pyranoflavonols or furanoflavonols, and the flavanone may be Hess Ferritin hesperetin, naringenin, eriodictyol or homoeriodictyol, and flavanol may be catechin (C), epicatechin (EC), epigallocatechin (EGC) (GCG), gallocatechin gallate (GCG) and the like, and flavanolol may be a taxifolin, such as epicatechin gallate (ECG), epigallocatechin gallate (EGCG), gallocatechin Or dihydrokaempferol or the like and the anthocyanidin may be cyanidin, delphinidin, malvidin, pelargonidin, peonidin or phenol, Petunidin, and the like.

In one embodiment of the present invention, the water-soluble transition metal salt forms a complex with the polyphenolic compound through a coordination bond, thereby effectively coating the egg shell coating composition on the egg shell, and forms a coordination bond with the polyphenolic compound (Al), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), and the like can be used as the metal of the water-soluble transition metal salt. And is made of cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), zirconium (Zr), molybdenum (Mo), ruthenium (Ru), rhodium (Rh), cadmium Or a mixture of two or more thereof. At this time, the lanthanum may be cerium (Ce), europium (Eu), gadolinium (Gd), terbium (Tb), or the like. The anion of the transition metal salt is not particularly limited and may be, for example, chloride, nitric acid, sulfuric acid, acetic acid, carbonic acid, phosphoric acid, lactic acid, citric acid, clonic acid, fumaric acid, ammonium, hydroxide or oxide.

The water-soluble transition metal salt and the polyphenolic compound form a complex through coordination bonding to form a stable nanocomposite layer on the egg shell surface. When the egg shell is coated with only the water-soluble polysaccharide polymer without the complex of the water-soluble transition metal salt and the polyphenolic compound, the coating layer may not be uniformly formed or the coating property may be deteriorated depending on the characteristics of the egg shell surface. Such uneven coatings and poor coating properties can lead to persistence of pathogenic bacteria or infiltration of pathogenic bacteria, leading to a reduction in lead.

However, a complex of a water-soluble transition metal salt and a polyphenolic compound, which are coordinated to each other, can be used together with the water-soluble polysaccharide polymer so that the egg shell coating composition can be effectively coated on the egg shell. Since the surface characteristics of commercially available egg shells are not uniform, and the surface roughness, hydrophilicity and hydrophobicity are different, the egg shell coating composition must be stably coated regardless of various surface characteristics as described above. The egg shell coating composition according to the present invention can be stably coated without being greatly influenced by the surface characteristics of the egg shell, and at the same time, the egg shell surface can be hydrophilized.

Preferably, the water-soluble transition metal salt is a harmless substance coated on the surface of the egg. For example, the water-soluble transition metal salt may be magnesium acetate, magnesium carbonate, magnesium chloride, Magnesium gluconate, magnesium hydroxide, magnesium oxide, magnesium sulphate, ferrous gluconate, ferrous fumarate, ferrous lactate, Ferrous sulphate, ferric citrate, ferric ammonium citrate, ferric phosphate, ferric pyrophosphate, sodium ferric pyrophosphate, glue, Such as cupric gluconate, cupric sulphate, zinc acetate, zinc chloride, zinc gluconate, But are not limited to, zinc oxide, zinc carbonate, zinc sulphate, manganese chloride, manganese gluconate, manganese sulphate, chromic chloride and molybdenum Ammonium molybdate (molybdenum (Ⅴ)), or the like, or a mixture of two or more thereof.

Particularly preferably, it is preferable to use a transition metal salt which does not give a color upon forming a complex with a polyphenol compound, and examples thereof include zinc acetate, zinc chloride, zinc gluconate, It is preferable to use a zinc salt which is any one or a mixture of two or more selected from the group consisting of zinc oxide, zinc carbonate, and zinc sulphate.

In one embodiment of the present invention, the water-soluble calcium salt plays a role of forming a polymer electrolyte complex by the water-soluble polysaccharide polymer, thereby improving the physical stability of the coating film. As a specific example, the water-soluble calcium salt may be any one or a mixture of two or more selected from the group consisting of calcium chloride, calcium hydroxide, calcium nitrate, calcium phosphate, calcium acetate, calcium citrate, calcium lactate and calcium gluconate But it is not limited thereto, and it can be used without particular limitation as long as it dissolves well in water and does not harm eggs and human body.

In one embodiment of the present invention, the egg shell coating composition comprises 0.01 to 5% by weight of a water soluble polysaccharide polymer, 0.005 to 1% by weight of a polyphenol compound, 0.001 to 0.5% by weight of a water soluble transition metal salt, 0.01 to 5% by weight of a water-soluble calcium salt, and the balance water. In such a range, leading maintenance and antibacterial efficiency can be improved, and egg shell coating composition can be effectively coated on egg shell surface.

Preferably, 0.05 to 3% by weight of the water-soluble polysaccharide polymer, 0.008 to 0.5% by weight of the polyphenol compound, 0.003 to 0.1% by weight of the water-soluble transition metal salt, 0.05 to 3% Water, and most preferably 0.1 to 1% by weight of the water-soluble polysaccharide polymer, 0.01 to 0.1% by weight of the polyphenol compound, 0.005 to 0.05% by weight of the water-soluble transition metal salt, From 0.1 to 1% by weight of the compound, and a balance of water. The composition can be particularly effectively coated on the egg surface in this range, and the freshness of the egg over a period of at least 20 days at room temperature can be increased to 50 H.U. Or more. In addition, the antimicrobial effect of the polyphenol compound is maximized, and the pathogenic bacteria remaining on the egg surface can be substantially completely removed.

More preferably, the egg shell coating composition according to an embodiment of the present invention comprises a water-soluble polysaccharide polymer as described above, and a mixture of a cationic polysaccharide polymer and a mixture of natural gums and anionic polysaccharide polymers, May include. The water-soluble polysaccharide polymer may include any one or a mixture of two or more members selected from the group consisting of cationic polysaccharide polymers: natural gums and anionic polysaccharide polymers in a weight ratio of 1: 0.1 to 10, more preferably cationic Polysaccharide polymer: a weight ratio of any one or two or more selected from the group consisting of natural gums and anionic polysaccharide polymers is in the range of 1: 0.5 to 5, more preferably a cationic polysaccharide polymer: a natural gum and an anionic polysaccharide polymer The weight ratio of any one or two or more mixtures selected may be from 1: 1 to 3. In such a range, the use of a cationic polysaccharide polymer, a mixture of natural gums and an anionic polysaccharide polymer, or a mixture thereof, effectively combines ionic crosslinking-based coacervation, As shown in FIG.

Particularly preferably, the weight ratio of each constituent material is suitably adjusted to further improve the coatability and antimicrobial properties of the egg shell coating composition. In one embodiment, the shell egg shell coating composition comprises 100 parts by weight of the water soluble polysaccharide polymer 1 to 50 parts by weight, preferably 5 to 30 parts by weight, more preferably 10 to 20 parts by weight, of the polyphenol compound. Also, the water-soluble polysaccharide may be 100 to 300 parts by weight, preferably 130 to 250 parts by weight, more preferably 150 to 200 parts by weight, based on 100 parts by weight of the water-soluble polysaccharide polymer. Further, the water-soluble polysaccharide may contain 0.1 to 20 parts by weight, preferably 0.5 to 10 parts by weight, more preferably 1 to 5 parts by weight, of a water-soluble transition metal salt based on 100 parts by weight of the water-soluble polysaccharide polymer.

In addition, the egg shell coating composition according to an embodiment of the present invention may further include at least one selected from the group consisting of a plasticizer and an antioxidant.

In one embodiment of the present invention, the plasticizer promotes the formation of a coating film on the egg shell surface and helps the coating film to be uniformly coated on the egg shell. The plasticizer is selected from the group consisting of sorbitol, mannitol, glycerol, polyethylene glycol, propylene glycol, It may be any one or a mixture of two or more selected from the group consisting of citrate, butyl citrate, acetyltriethyl citrate, acetyl tributyl citrate, diacetyl monoglyceride and diethyl phthalate, no. By adding such a plasticizer, the egg shell coating composition can be effectively coated on the egg shell surface, and the moisture retention of the egg can be improved, so that the egg yolk can be maintained for a longer period of time.

In one embodiment of the present invention, the antioxidant is added in order to prevent deterioration caused by oxygen in the air. The antioxidant is selected from the group consisting of ascorbic acid, isoarsorbic acid, erythorbic acid, glutathione and carotenoid , Or a mixture of two or more thereof, but is not limited thereto.

In one embodiment of the present invention, the plasticizer and the antioxidant may be added in an appropriate amount to the extent that the object of the present invention is not impaired. Specifically, for example, the egg shell coating composition may contain 0.1 ~ 5% by weight of an antioxidant and 0.005 to 1% by weight of an antioxidant, more preferably 0.1 to 5% by weight of a plasticizer in 100% by weight of an egg shell coating composition, 0.005 to 1% by weight of an antioxidant, 0.1 to 5% by weight of a plasticizer in 100% by weight, and 0.005 to 1% by weight of an antioxidant. Within the above range, the effect of the plasticizer and the effect of the antioxidant may be excellent.

In addition, adjusting the weight ratio of the plasticizer and the antioxidant according to the content of the other constituents is preferable for improving the plasticizer effect and the effect of the antioxidant without impairing the coatability and antibacterial property of the egg shell coating composition, In one embodiment, the egg shell coating composition may contain 100 to 300 parts by weight, preferably 130 to 250 parts by weight, more preferably 150 to 200 parts by weight of a plasticizer based on 100 parts by weight of the water-soluble polysaccharide polymer. Also, it may contain 1 to 50 parts by weight, preferably 5 to 30 parts by weight, more preferably 10 to 20 parts by weight of an antioxidant based on 100 parts by weight of the water-soluble polysaccharide polymer.

The present invention also provides an egg coated with the egg shell coating composition. In this case, before coating with the egg shell coating composition as described above, the eggs may be washed with water, and may be coated with the egg shell coating composition to have superior lead and sanitary properties.

As described above, the eggs coated with the egg shell coating composition according to the present invention are coated with the egg shell coating composition on the surface of eggs instead of the cuticle membrane removed in the egg washing process, 50 HU And the pathogenic bacteria remaining on the surface of eggs can be substantially completely removed by the antimicrobial activity of the egg shell coating composition, leading to excellent safety, safety and hygiene.

In one example of the present invention, eggs coated with the egg shell coating composition may satisfy the line defined by the following relationship (1).

[Relation 1]

(HU _c -HU _u ) / HU _u x 100? 5

In the above formula 1, HU _c means the Haugh unit (HU) of the egg coated with the egg shell coating composition according to the present invention, HU _u indicates the 21st Haugh unit of the uncoated washing egg it means. Where HU _c and HU _u are Haugh units of eggs stored at 20 ° C and 24% humidity for 21 days.

Further, the storm unit can be calculated through the following equation (1).

[Equation 1]

In the above equation (1), H is the height (mm) of egg white enriched in the egg, and W means the weight (g) of the egg.

Specifically, the coated egg according to one embodiment of the present invention may have a line defined by the above-mentioned relational expression 1 of 7 or more, more specifically 9 or more, and may be not more than 30.

The present invention also provides an egg shell coating method. Specifically, the egg shell coating method according to the present invention includes the steps of preparing a coating solution containing the egg shell coating composition as described above, and spraying or dipping the coating solution into the egg shell, followed by drying.

Specifically, an egg shell coating method comprising the steps of preparing a coating solution containing a water-soluble polysaccharide polymer, a polyphenolic compound, a water-soluble calcium salt and a water-soluble transition metal salt, and spraying or dipping the coating solution into egg shells and then drying .

Here, the water-soluble polysaccharide polymer, the polyphenol compound, the water-soluble calcium salt and the water-soluble transition metal salt are the same as described above, and a duplicate description thereof will be omitted.

When the egg shell coating composition, which is a coating solution, is prepared by the above-described composition and content, the coating solution can be sprayed or immersed in the egg shell to form a coating film on the surface of the egg.

In one example of the present invention, spraying or immersion, which is a coating method, can be used without any particular limitation as long as it is a conventional method.

The spray according to an exemplary embodiment of the present invention may be sprayed through a plurality of nozzles in the upper and lower directions of the egg shell. Specifically, an embodiment of the spraying method may be a method of manufacturing an aerosol comprising the egg shell coating composition through compressed air, and coating the surface of egg shell with the aerosol. In another embodiment, the egg shell coating composition is sprayed in the form of a liquid via a pump, and the surface of egg shell is coated.

The number of nozzles for spraying or spraying is not particularly limited as long as it is a plurality of nozzles, and may be, for example, 2 to 10 nozzles, but is not limited thereto.

In addition, in the spraying, the number of times of spraying and the spraying time are sufficient to uniformly form the coating film on the egg shell as a whole. For example, the number of injections may be performed one or more times, and the upper limit thereof is not particularly limited, but it may be less than 10 times. However, the number of injections may be varied depending on the injection time. The injection time may also be controlled according to the number of injections. In one embodiment, when the number of injections is one, the injection time may be 5 to 60 seconds, but is not limited thereto.

The immersion according to an example of the present invention forms a coating film on the egg shell by immersing the egg in a coating solution. The number of times of immersion and the immersion time are sufficient to uniformly form the coating film on the egg shell as a whole. For example, The upper limit is not particularly limited, but it may be less than 10 times, but the number of times may also be varied depending on the immersion time. The immersion time may also be controlled according to the number of immersion times. In one specific example, if the immersion time is one time, the immersion time may be 5 to 60 seconds, but is not limited thereto.

The drying process can then be carried out. The drying temperature and the drying time are sufficient to completely dry the coating film, and in one embodiment, the drying process may be performed at room temperature for 30 minutes to 3 hours. The room temperature may vary depending on the season, and may be from 15 to 40 캜.

The present invention also provides a method of maintaining egg yolk. The method for maintaining an egg line according to the present invention includes coating egg shell surfaces of the eggs with the egg shell coating composition.

In detail, the present invention relates to an egg-holding method comprising coating an egg shell surface of an egg with an egg shell coating composition comprising a water-soluble polysaccharide polymer, a polyphenolic compound, a water-soluble calcium salt and a water-soluble transition metal salt.

The water-soluble polysaccharide polymer, the polyphenol compound, the water-soluble calcium salt and the water-soluble transition metal salt are the same as described above, and the method of coating the egg shell surface is the same as described above.

As such, by coating the egg shell with the egg shell coating composition, superior guidance, safety and hygiene can be secured as compared to uncoated wash and non-washed eggs.

Hereinafter, egg shell coating compositions according to the present invention, eggs coated with eggs, egg shell coating methods using the same, and egg retention methods using the same will be described in detail. It should be understood, however, that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

Unless otherwise defined, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In addition, the unit of the additives not specifically described in the specification may be% by weight.

[Example 1]

120 Hansol poultry were directly washed and prepared.

0.1% by weight of chitosan (average molecular weight 35,000 g / mol), 0.2% by weight of gum arabic (average molecular weight 250,000 g / mol), tannic acid (molecular weight 1701 g / mol, gallotannin, C ₇₆ H ₅₂ O ₄₆ ) One pack type egg shell coating composition was prepared containing 0.05% by weight of calcium chloride (CaCl ₂ ), 0.01% by weight of zinc sulfate (ZnSO ₄ ), 0.5% by weight of sorbitol, 0.05% by weight of ascorbic acid and a balance of purified water .

Next, as shown in FIG. 1, the egg shell coating composition was sprayed three times (total of 6 times) in two times for 30 seconds after putting 40 eggs at one time in the spraying apparatus, dried at room temperature for 1 hour .

[Example 2]

All the steps were carried out in the same manner as in Example 1 except that the addition amount of chitosan was changed to 0.01 wt%.

[Example 3]

All the steps were carried out in the same manner as in Example 1 except that the amount of gum arabic added was changed to 0.01 wt%.

[Example 4]

All the steps were carried out in the same manner as in Example 1 except that the addition amount of tannic acid was changed to 0.01 wt%.

[Example 5]

All the steps were carried out in the same manner as in Example 1 except that the addition amount of chitosan was changed to 1.0 wt%.

[Example 6]

All the steps were carried out in the same manner as in Example 1 except that the amount of gum arabic added was changed to 1.0 wt%.

[Example 7]

All the steps were carried out in the same manner as in Example 1 except that the addition amount of tannic acid was changed to 0.5 wt%.

[Comparative Example 1]

120 egg cleaned eggs were prepared without coating egg shell coating composition.

[Comparative Example 2]

120 eggs were prepared without coating egg shell coating composition.

[Comparative Example 3]

All the steps except that no chitosan was added were carried out in the same manner as in Example 1.

[Comparative Example 4]

All the steps except that no gum arabic was added were carried out in the same manner as in Example 1.

[Comparative Example 5]

All the steps other than the addition of tannic acid were carried out in the same manner as in Example 1.

[Comparative Example 6]

All the steps except that no calcium chloride (CaCl ₂ ) was added were carried out in the same manner as in Example 1.

[Comparative Example 7]

All the steps except that zinc sulfate (ZnSO ₄ ) was not added were carried out in the same manner as in Example 1.

Components and Concentration (% by weight) Chitosan Arabian sword Tannic acid Calcium chloride Zinc sulfate Example 1 0.1 0.2 0.05 0.5 0.01 Example 2 0.01 0.2 0.05 0.5 0.01 Example 3 0.1 0.01 0.05 0.5 0.01 Example 4 0.1 0.2 0.01 0.5 0.01 Example 5 1.0 0.2 0.05 0.5 0.01 Example 6 0.1 1.0 0.05 0.5 0.01 Example 7 0.1 0.2 0.5 0.5 0.01 Comparative Example 1 - Comparative Example 2 - Comparative Example 3 - 0.2 0.05 0.5 0.01 Comparative Example 4 0.1 - 0.05 0.5 0.01 Comparative Example 5 0.1 0.2 - 0.5 0.01 Comparative Example 6 0.1 0.2 0.05 - 0.01 Comparative Example 7 0.1 0.2 0.05 0.5 -

[Experiment result]

(1) Measurement of rainfall unit (H.U.)

120 eggs were stored at 20 ° C and 24% humidity. Eggs from each of 120 eggs were analyzed with an egg analyzer (Egg analyzer, ORKA) Every 7 days HU And the average value thereof is shown in Table 2 below. In addition, The value was calculated through the following equation. However, the O-days shown in Table 2 means a day when the egg was not scattered and coated with the egg shell coating composition, and the coating process was performed one to two days after the egg laying.

(Equation 1)

In the above equation 1, H is the height (mm) of the thick egg white, and W is the weight (g) of the egg.

H.U. 0 days 7 days 14 days 21st Example 1 81.88 68.82 56.43 51.65 Example 2 83.14 67.98 54.82 49.53 Example 3 83.48 67.97 54.89 49.66 Example 4 82.51 68.11 55.57 49.51 Example 5 82.69 68.16 55.22 51.34 Example 6 83.19 68.39 55.78 49.50 Example 7 81.90 67.94 55.91 49.86 Comparative Example 1 81.72 65.68 51.70 46.97 Comparative Example 2 83.07 65.22 52.22 48.26 Comparative Example 3 82.04 65.99 53.78 49.22 Comparative Example 4 82.62 66.51 54.44 48.55 Comparative Example 5 82.63 66.24 54.56 48.44 Comparative Example 6 82.07 67.88 52.71 49.43 Comparative Example 7 82.89 67.84 53.39 49.33

As shown in Table 2, in Examples 1 to 7 in which chitosan, gum arabic, tannic acid, calcium chloride (CaCl ₂ ) and zinc sulfate (ZnSO ₄ ) were all added, the HU value was higher than the comparative examples there was.

In particular, in Example 1 in which chitosan, gum arabic, tannic acid, calcium chloride (CaCl ₂ ), and zinc sulfate (ZnSO ₄ ) were added at appropriate concentrations, the longest HU value was maintained at 50 or more, .

On the other hand, in the case of Examples 2 to 7 in which the concentration of chitosan was too low or too high, And the coating properties were somewhat lowered. In particular, in Examples 5 to 7 in which the concentrations of chitosan, gum arabic or tannic acid were too high, white spots were formed on the surface of the eggs, and the raw materials were used in excess, resulting in economical problems and surface irregularities.

On the other hand, in the case of Comparative Examples 1 and 2, the eggshell surface composition was not coated with egg shell coating composition, whereas in Comparative Example 1, the cuticle membrane was removed by the washing step. And it was confirmed that the value decreased most rapidly. In the case of Comparative Example 2, which was a non-cleansing column, the cuticle membrane was preserved and the lineability of Comparative Example 1 was excellent, but there was a problem that some pathogenic bacteria such as Salmonella and Escherichia coli remained on the surface of eggs.

Also, in the case of Comparative Examples 3 to 7 in which one component of the egg shell coating composition was omitted, there was a problem that the coating power was weaker than those of the examples, and H. U. The value was also lower.

As can be seen from the above Examples and Comparative Examples, it was confirmed that the egg line was most effectively retained when chitosan, gum, tannic acid, calcium chloride (CaCl ₂ ) and zinc sulfate (ZnSO ₄ ) And the antimicrobial effect was also excellent.

(2) Antimicrobial activity test

In order to test the antimicrobial activity, an agar plate was coated with the egg shell coating composition of Example 1, and E. coli culturing experiment was carried out on the agar plate. In addition, E. coli culturing experiments were carried out on a non-treated agar plate as a control group, and the results are shown in Fig.

As shown in Fig. 3, Escherichia coli was cultured in the control group, and it was confirmed that E. coli was not cultured when coated with the egg shell coating composition of Example 1.

From this, it was confirmed that the egg shell coating composition according to the present invention can prevent the pathogenic bacteria remaining on the surface of the egg from being alive when coated on the surface of the egg, and has excellent antibacterial activity.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Various modifications and variations may be made thereto by those skilled in the art.

Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

Claims (19)

Cationic polysaccharide polymers; A water-soluble polysaccharide polymer, a polyphenolic compound, a water-soluble calcium salt, and a water-soluble transition metal salt, wherein the water-soluble polysaccharide polymer comprises any one or a mixture of two or more selected from natural gums and anionic polysaccharide polymers. delete The method according to claim 1,
Wherein said cationic polysaccharide polymer is selected from the group consisting of chitosan, chitin, (C1-C6) alkylamino (C1-C6) alkylcellulose, (C1- C6) alkylamino Or a mixture of any two or more thereof. The method according to claim 1,
The natural gums may be selected from the group consisting of gum arabic, gatifi gum, guar gum, xanthan gum, gellan gum, tara gum, konjac gum, karaya gum, tamarind gum, tragacanth gum, locust bean gum, carrageenan, Wherein the anionic polysaccharide polymer is selected from the group consisting of alginic acid, pectin, carrageenan, hyaluronic acid, carboxy (C 1 -C 6) alkylcellulose, sulfo (C 1 -C 6) alkylcellulose carboxy (C1-C6) alkyl sulfates, cellulose sulfates, cellulose (C1-C6) alkyl sulfates, Phosphate, chondroitin sulfate, dextran sulfate, dextrin sulfate, and salts thereof. The method according to claim 1,
Wherein the egg shell coating composition comprises 0.01 to 5 wt% of a water soluble polysaccharide polymer, 0.005 to 1 wt% of a polyphenolic compound, 0.001 to 0.5 wt% of a water soluble transition metal salt, 0.01 to 5 wt% of a water soluble calcium salt, Lt; RTI ID = 0.0 > water. ≪ / RTI > 6. The method of claim 5,
Wherein the water-soluble polysaccharide polymer comprises any one or a mixture of two or more selected from the group consisting of cationic polysaccharide polymers: natural gums and anionic polysaccharide polymers in a weight ratio of 1: 0.1 to 10. The method according to claim 1,
Wherein the polyphenolic compound is a tannin compound, a flavonoid compound, or a mixture thereof. 8. The method of claim 7,
The tannin compound may be a tannic acid, a gallotannin, a ellagitannins, or a mixture thereof; a hydrolyzable tannin compound; A condensed tannin compound which is a polymer of a flavonoid compound; Or a mixture thereof. 8. The method of claim 7,
Wherein the flavonoid compound is any one or a mixture of two or more selected from the group consisting of flavone, isoflavone, flavonol, flavanone, flavanol, flavanol, and anthocyanidin. The method according to claim 1,
The metal of the water-soluble transition metal salt may be at least one selected from the group consisting of aluminum (Al), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni) ) Is at least one selected from the group consisting of zirconium (Zr), molybdenum (Mo), ruthenium (Ru), rhodium (Rh), cadmium (Cd) and lanthanum. 11. The method of claim 10,
The water-soluble transition metal salt may be at least one selected from the group consisting of magnesium acetate, magnesium carbonate, magnesium gluconate, magnesium hydroxide, magnesium oxide, magnesium sulfate, ferric gluconate, ferrous fumarate, ferrous lactate, ferrous sulfate, iron citrate, Zinc pyrophosphate, sodium ferric pyrophosphate, copper gluconate, copper sulfate, zinc acetate, zinc chloride, zinc gluconate, zinc oxide, zinc carbonate, zinc sulfate, manganese chloride, manganese gluconate, manganese sulfate, chromium chloride and ammonium molybdate ≪ / RTI > or a mixture of any two or more thereof. The method according to claim 1,
Wherein the water-soluble calcium salt is any one or a mixture of two or more selected from the group consisting of calcium chloride, calcium hydroxide, calcium nitrate, calcium phosphate, calcium acetate, calcium citrate, calcium lactate and calcium gluconate. The method according to claim 1,
Wherein the egg shell coating composition further comprises at least one selected from the group consisting of plasticizers and antioxidants. 14. The method of claim 13,
Wherein the egg shell coating composition comprises from 0.1 to 5% by weight of a plasticizer and from 0.005 to 1% by weight of an antioxidant in 100% by weight of the egg shell coating composition. 14. The method of claim 13,
The plasticizer is selected from the group consisting of sorbitol, mannitol, glycerol, polyethylene glycol, propylene glycol, triethyl citrate, butyl citrate, acetyl triethyl citrate, acetyl tributyl citrate, diacetyl monoglyceride and diethyl phthalate Or a mixture of two or more thereof;
Wherein the antioxidant is any one or a mixture of two or more selected from the group consisting of ascorbic acid, isoarsorbic acid, erythorbic acid, glutathione and carotenoid. An egg coated with an egg shell coating composition as claimed in any one of claims 1 and 3 to 15. Preparing a coating solution comprising the egg shell coating composition of any one of claims 1 and 3 to 15, and spraying or dipping the coating solution into egg shells followed by drying, Way. 18. The method of claim 17,
Wherein the spray is sprayed and coated through a plurality of nozzles in the upper and lower directions of the egg shell. A method of retaining egg yolk comprising coating an egg shell surface of an egg with the egg shell coating composition of any one of claims 1 and 3 to 15.

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