KR101742708B1 - Coating compositions using natural compounds for food package and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a coating composition for a food packaging material having excellent storage stability, including a solvent, an amine-based additive, a natural product and a filler, and can provide a coating composition which is easy to handle by increasing storage stability as an environment- And a coating film for a food packaging material having an appropriate transmittance and haze and excellent barrier property can be provided by using the coating composition for a food packaging material.

Description

TECHNICAL FIELD The present invention relates to a coating composition for food packaging materials using natural materials,

More particularly, the present invention relates to a coating composition for food packaging materials, a coating film, and a method for producing the same, which can improve the storage stability of a coating composition containing a natural product .

The present invention relates to a coating composition having oxygen barrier properties and a method for producing a film. In order to improve the distribution stability of the product through proper packaging of the contents of the food and the added value as processed food, This is how you can.

In general, a phenomenon in which a food is decomposed into a low molecular substance by the action of microorganisms, light rays, oxygen, chemicals, and the like, and the taste, smell, color, appearance and the like lose their original quality is called alteration or deterioration. In order to suppress this phenomenon, it is necessary to minimize the contamination of microorganisms and chemicals through the hygienic manufacturing process, and to minimize the contact of the contents from degradation factors (light rays, moisture, oxygen, etc.) to be.

Particularly, the moisture content of the contents and the oxygen concentration inside the packaging directly affect the growth of the microorganisms and the rancidity of the contents. Therefore, the selection and application of the packaging materials having adequate moisture and oxygen barrier properties for stable storage and distribution of the food content It is a very important factor in food development.

Synthetic resin films commonly used in the field of food packaging currently include general-purpose materials such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), and polyacrylonitrile , Polyvinyl alcohol (PVA), polyvinylidene chloride (PVDC), ethylene vinyl alcohol (EVOH) and polyamide (PA) are prepared with a solvent type coating agent and then thin film coating is performed on the above- And ultimately, a variety of composite film types are manufactured with a multi-layer structure such as PP / EVOH / Nylon, PP / Nylon / Al foil / PET and the like.

However, EVOH and PVDC, which are mainly used as coating liquids, are mostly solvent-based coatings containing a high content of organic solvents due to their low solubility. Such coatings are not only economical, but also cause environmental problems This has caused continuous problems in terms of the health and safety of workers manufacturing composite films. Accordingly, there is a great need to develop an environmentally friendly and safe water-based coating agent and a composite film using the same. Accordingly, studies for replacing existing plastic films with biopolymer materials derived from natural materials have been actively conducted.

Conventional techniques for reporting coating agents using natural macromolecular biomaterials have resulted in oxygen and moisture barrier properties required by food packaging materials by combining natural ingredients such as carbohydrates, proteins, and lipids with plasticizer components, There is a problem in the step of commercialization due to the following problems.

First, the natural-based water-based coating agent can not maintain the initial liquid state due to the continuous increase of the viscosity depending on the storage and distribution period of the product, thereby causing a defective coating process and, in some cases, The oxygen barrier property of the coated final composite film also deteriorates. That is, the storage stability of the coating agent can not be ensured, so that there is a problem that distribution and painting are impossible.

Second, due to the nature of natural products, corruption occurs during the storage and distribution process, and there is a problem that the odor is generated due to the problem of corruption and the physical properties are deteriorated accordingly.

In addition, conventional techniques for coating compositions for food packaging materials, including natural products and plasticizers, have been carried out by adding natural and plasticizers to distilled water and stirring the mixture at 90 DEG C for 30 minutes to hydrate natural products.

In the present invention, the existing natural product-based water-soluble coating agent solves the problem that the viscosity change (thickening) of the coating agent during the storage and distribution period of the product occurs severely and corruption occurs rapidly, and unlike the existing technology, The present invention provides a coating composition capable of proceeding with hydration of natural products and a method for producing the same.

1. Korean Registered Patent No. 10-0510090 (2010.09.07) 2. Korean Patent Laid-Open No. 10-2012-0056023 (2012.06.01)

The present invention relates to a coating composition for food packaging materials containing natural products such as whey protein and the like for solving the above-mentioned problems of a coating agent containing natural products such as changes in viscosity over time, and a coating composition capable of enhancing storage stability of a coating agent Method.

Another object of the present invention is to provide a coating film for a food packaging material having excellent permeability and haze using the coating composition for food packaging materials and excellent barrier properties, and a method for producing the same.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

The present invention provides a composition comprising a solvent, an amine additive, a natural product and a filler, wherein the coating composition has barrier properties.

Also, the amine-based additive may include a primary amine, a secondary amine, a tertiary amine or a mixture thereof. The primary amine may be selected from the group consisting of methylamine, methanolamine, ethylamine, ethanolamine, propylamine, 3-amino- Wherein the secondary amine is selected from the group consisting of monoisopropanolamine, tert-butylamine, butylamine, hexylamine, dodecylamine, cyclohexylamine, ethylenediamine and hexamethylenediamine. The secondary amine is selected from the group consisting of dimethylamine, diethylamine, diethanolamine, dipropylamine, N-ethylmethylpropylamine At least one selected from the group consisting of 3- (METHYLAMINO) -1-PROPANOL, N-Isopropylmethylamine, Dibutylamine, Di-sec-butylamine, Dioctylamine, N-methylcyclohexylamine, Pyrrolidine, Pyridine and Diethylenetriamine, Amines include trimethylamine, trimethanolamine, triethylamine, triethanolamine, dimethylethanolamine, N, N-dimethylpropylamine, N, N-dimethylbutylamine, 3-dimethylamino- N, N ', N'-tetramethyl-1,4-butanediamine, N, N-dimethyloctadecylamine, tripentylamine, N, N-dimethylcyclohexylamine, 3- Or more.

The amine-based additive is contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the natural product, and the filler is included in an amount of 90 to 110 parts by weight with respect to 100 parts by weight of the natural product.

Also, the coating composition for food packaging materials is characterized in that the rate of viscosity change after 15 weeks is about 15% or less after 2 weeks with respect to the initial viscosity at a temperature of 15 to 25 캜 and 50 to 60%.

The present invention also provides a coating film for a food packaging material comprising a base film and a barrier film formed from the coating composition for the food packaging material on the base film.

The present invention also relates to a process for preparing a food product, which comprises dissolving an amine-based additive in distilled water, adding a natural product while stirring the solution, and adding a filler to the solution, The present invention also provides a method for preparing a remelting coating composition.

The present invention relates to a coating composition for a food packaging material having barrier properties including a solvent, an amine-based additive, a natural product and a filler, and a process for producing the same, and provides a coating composition which is easy to handle by increasing storage stability as an environment- .

Also, it is possible to provide a coating film for a food packaging material having a proper transmittance and haze using the coating composition for a food packaging material and having excellent barrier properties, and a method for producing the same.

FIG. 1 illustrates a method of preparing a coating composition for a food packaging material according to an embodiment of the present invention.
FIG. 2 illustrates a method of manufacturing a coating film for a food packaging material according to an embodiment of the present invention.

Before describing the present invention in detail, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention, which is defined solely by the appended claims. shall. All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise stated.

Throughout this specification and claims, the word "comprise", "comprises", "comprising" means including a stated article, step or group of articles, and steps, , Step, or group of objects, or a group of steps.

On the contrary, the various embodiments of the present invention can be combined with any other embodiments as long as there is no clear counterpoint. Any feature that is specifically or advantageously indicated as being advantageous may be combined with any other feature or feature that is indicated as being preferred or advantageous. Hereinafter, embodiments of the present invention and effects thereof will be described with reference to the accompanying drawings.

Coating compositions for food packaging materials and methods for their preparation

The coating composition for food packaging material according to one embodiment of the present invention is a coating composition for food packaging material having improved storage stability including solvents, amine additives, natural products and fillers, and is an eco-friendly material containing natural materials. Thereby providing an easy coating composition.

The coating composition for a food packaging material according to the present invention may have a barrier property when a coating film is formed according to a composition such as a component and a content. Here, the barrier property means barrier property against oxygen and moisture. Most food products are made of organic materials and are vulnerable to moisture, oxygen, and other gases, and use a variety of barrier materials that can block moisture, oxygen, carbon dioxide, nitrogen, ultraviolet rays, and the like.

Natural products are polymeric forms in which amino acids are bonded. Each molecule has a carboxyl group (-COOH), an amine group (-NH ₂ ) and a peptide bond (-O═C-NH- ), And a protein having excellent oxygen barrier property is used.

For example, whey protein (9410 WPI), concentrated whey protein (8000 WPC), soy protein isolate (SPI), rice protein isolate (RPI), oat protein isolate (OPI) Pea protein isolate (PPI), casein, sodium caseinate, corn zein, gelatin, wheat protein, chitosan, dextrins, Natural materials including at least one selected from the group consisting of carrageenans and cellulose are used.

Since the functional groups contained in the natural protein cause hydrogen bonding to increase the viscosity, blocking the functional groups to block hydrogen bonding sites prevents viscosity increase can do.

Alkali compounds are used to block the hydrogen bonding between the carboxyl group and the ketone group contained in the protein structure. More specifically, as an alkaline compound, an inorganic alkaline compound containing a potassium hydroxide (KOH), sodium hydroxide (NaOH), calcium hydroxide (Ca (OH) ₂ ), sodium carbonate (Na ₂ CO ₃ ) An organic alkali compound including a tertiary amine and the like can be used.

As shown in Examples and Experimental Examples to be described later, it has been shown that the use of an acid compound as an additive, unlike the case of using an acid compound as an additive, has an effect of preventing viscosity increase due to blocking. Among the alkaline compounds, the use of an organic alkaline amine additive has been shown to work with the ketone group (C = O) present in the chain as well as the carboxyl group (-COOH) at the protein end.

Accordingly, the coating composition for food packaging materials according to the present invention can increase the storage stability by controlling the viscosity of the composition including amine-based additives. The desired viscosity can be controlled according to the content of the amine-based additive and the viscosity of the coating composition is maintained at the initial viscosity during storage.

The amine-based additive may be a primary amine, a secondary amine, a tertiary amine, or a mixture thereof. For example, it is possible to use methylamine, methanolamine, ethylamine, ethanolamine, propylamine, 3-amino-1-propanol, isopropylamine, monoisopropanolamine, tert-butylamine, butylamine, hexylamine, dodecylamine, cyclohexylamine, ethylenediamine and hexamethylenediamine as primary amines. N-Methylpropylamine, 3- (METHYLAMINO) -1-PROPANOL, N-Isopropylmethylamine, Dibutylamine, Di-sec-butylamine, Dioctylamine, N-methylcyclohexylamine, Pyrrolidine, Diethylamine, Diethanolamine, Dipropylamine, N-Ethylmethylamine, Pyridine and Diethylenetriamine may be used as the primary amine and Trimethylamine, Trimethanolamine, Triethylamine, Triethanolamine, Dimethylethanolamine, N, N-Dimethylpropylamine, N, N-Dimethylbutylamine, 3-Dimethylamino- N, N ', N'-tetramethyl-1,4-butanediamine may be used.

The amine-based additive may be included in an amount of 10 to 30 parts by weight based on 100 parts by weight of the natural product. Preferably 10 to 20 parts by weight, and more preferably 15 to 20 parts by weight.

The coating composition for a food packaging material according to the present invention is characterized in that the filler is located in the holes between the network structures formed by the protein chains during the production of the coating composition including the filler to increase the barrier properties by filling the holes, The effect of smoothing is given.

The filler may be selected from the group consisting of sorbitol, fructose, sucrose, mannitol, propylene glycol, glycerol and polyethylene glycol (PEG200, PEG400, PEG600, etc.) And at least one selected from the group consisting of

The filler may be included in an amount of 90 to 110 parts by weight based on 100 parts by weight of the natural product. Preferably 95 to 105 parts by weight.

As the solvent of the coating composition for food packaging materials according to the present invention, distilled water or purified water is preferably used.

The method for preparing a coating composition for a food packaging material according to an embodiment of the present invention includes the steps of (S10) diluting an amine-based additive to a solvent as shown in FIG. 1, adding a natural product while stirring the solution, And a step (S30) of adding a filler to the solution to provide a coating composition for food packaging material having excellent storage stability.

 The step (S10) of diluting the amine-based additive in the solvent according to the present invention is a step of diluting the amine-based additive to distilled water having a weight of 100 times or more the weight of the natural product added in the step described later. The kind of the amine-based additive is the same as that described above, and the amount of the amine-based additive added is 10 to 30% by weight based on the weight of the natural product added in the step to be described later. Preferably 10 to 20% by weight, and more preferably 15 to 20% by weight.

The step (S20) of adding the natural product according to the present invention is a step of slowly adding the natural product to the solution prepared in the step (S10) while stirring. The natural product uses the same natural product as described above.

In the step S30 of adding the filler according to the present invention, after the stirring in the step S20 is completed, a filler is added to prevent the natural product from being re-aggregated to prepare a coating composition. The filler may be added in an amount of 90 to 110% by weight based on the weight of the natural product. Preferably 95 to 105 parts by weight, and more preferably the same amount as the natural product.

In the case of the coating composition for food packaging materials according to one embodiment of the present invention, the rate of change in viscosity after two weeks from initial viscosity at room temperature and normal humidity conditions (20 캜 5 캜, 55 캜 5%) is 15% , Which can be supported by experimental examples to be described later.

Coating film for food packaging material and manufacturing method thereof

The coating film 100 for a food packaging material according to an embodiment of the present invention includes a base film 10 and a barrier film 20 formed on the base film. The barrier film 20 is a barrier film formed from a coating composition for a food packaging material according to an embodiment of the present invention.

The base film may be made of polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polycarbonate (PC), polymethyl methacrylate (PMMA) , Polyimide (PI), oriented polypropylene (OPP), biaxially oriented polypropylene (BOPP), polyethylene 2,6-dicarboxyl naphthalate, PEN), polyethersulfone (PES), polyester, polystyrene (PS), or the like can be used.

Further, the coating film for food packaging material according to an embodiment of the present invention may further include a nylon film 30 formed on the barrier film 20.

As shown in FIG. 2, the coating film for food packaging material according to an embodiment of the present invention includes a step (S100) of applying a coating composition for a food packaging material to a substrate film at a predetermined thickness (S100) (S200). ≪ / RTI >

In the coating step S100, a coating method such as a spray coating method, a spin coating method, a dip coating method, a gravure coating method, a micro gravure coating method, a die coating method, A die coating, a comma coating, a knife coating, a direct coating, and a bar coating may be used.

A coating composition for a food packaging material or a coating composition for a food packaging material prepared by the above-described method is applied onto the base film using an applicator. The coating thickness is uniformly applied in a thickness of 1 to 10 mu m on the basis of the dry coating thickness, and the thinner the coating thickness within the above thickness range showing the oxygen barrier property, the more economical and advantageous in terms of work process.

More specifically, after a substrate film is closely adhered to a glass plate of a film coating apparatus, a small amount of the coating composition for a food packaging material is dripped onto a base film and applied with a certain thickness within the above range using an applicator.

The drying step (S200) is a step of drying the base film coated with the coating composition using a hot-air drier and drying at 100 to 120 ° C for 3 to 10 minutes to form a barrier film on the base film . More preferably at 110 to 120 DEG C for 3 to 5 minutes to form a barrier film on the substrate film.

The method of manufacturing a coating film for a food packaging material according to an embodiment of the present invention may further include forming a nylon film on the formed barrier film (S300).

The transmittance of the coating film for a food packaging material comprising a base film and a barrier film produced according to an embodiment of the present invention is 89 to 90%, the haze value has an appropriate transmittance and haze of 5% or less, and an oxygen permeability is 0.2 To 0.5 g / m < ² > * day, which is supported by experimental examples to be described later.

Example  1 - as an additive Organic alkali , Inorganic alkaline, organic acid, inorganic acid

(1) Preparation of coating composition

As shown in Table 1, except for Comparative Example 1-1, 1.33 g of acid and alkali additives were diluted in 92 g of distilled water, and the reaction product was stirred at 600 rpm using a mechanical stirrer under stirring with a whey protein Of 9410 WPI) is slowly added and stirred for 24 hours. After the stirring, 8 g of sorbitol was added to prepare a coating composition.

In Examples 1-1 and 1-2, organic alkaline materials were applied, Comparative Examples 1-2 and 1-3 are inorganic alkaline, Comparative Examples 1-4 and 1-5 are organic acids, and Comparative Examples 1-6, 1-7 were compared by applying inorganic acid.

In the case of Comparative Example 1-1, 8 g of whey protein and 8 g of sorbitol were added to 92 g of distilled water in detail, and the mixture was stirred at 300 rpm for 30 minutes at 90 ° C or more using a mechanical stirrer. To prepare a coating composition.

Additive type Example 1-1 Triethanolamine Examples 1-2 Dimethylethanolamine Comparative Example 1-1 No additive added Comparative Example 1-2 Sodium hydroxide Comparative Example 1-3 Potassium hydroxide Comparative Example 1-4 Acetic acid Comparative Example 1-5 Propanoic acid Comparative Example 1-6 Hydrochloric acid Comparative Example 1-7 Sulfuric acid

(2) Coating film production

After the base film (PET) was closely adhered to the glass plate of the coating machine, about 1 to 2.5 g of the coating composition prepared in Example 1 and Comparative Example 1 was dropped to the top of the base film and applied with an applicator (YBA-5) And the coating composition was applied to the substrate film to a predetermined thickness. The film coated with the coating composition at 120 ° C for 3 to 5 minutes was dried using a hot air dryer to prepare coating films of Example 1 and Comparative Example 1.

Experimental Example 1

(1) Viscosity measurement

The viscosity of the coating composition prepared according to Example 1 and Comparative Example 1 was measured at room temperature and normal humidity (20 ± 5 ° C, 55 ± 5%) using a Brookfield DV-II + Pro viscometer spindle: No. 63, rpm: 100 rpm), and the initial viscosity at 24 ° C and the humidity of 51% and the viscosity after 2 weeks of storage were measured and are shown in Table 2 below. The viscosity change rate (%) is shown in Table 2 as the following formula.

Viscosity (cP) Viscosity change rate (%) Early after 2 weeks Example 1-1 12.3 12.5 1.63 Examples 1-2 2325 2338 0.56 Comparative Example 1-1 1780 10,000 or more ^* - Comparative Example 1-2 18.5 452.8 2347.57 Comparative Example 1-3 20.5 385.9 1782.44 Comparative Example 1-4 8760 10,000 or more ^* - Comparative Example 1-5 5970 10,000 or more ^* - Comparative Example 1-6 58.7 10,000 or more ^* - Comparative Example 1-7 43.2 987.3 2185.42

(* Can not be measured by viscometer)

As shown in Table 2, the coating composition for food packaging material according to Example 1 had a viscosity change rate of 2% or less after 2 weeks with respect to the initial viscosity, and a viscosity change rate after 2 weeks was not measurable or a viscosity change rate exceeded 1700% , The viscosity change rate is remarkably low and the storage stability is also excellent. Especially in the case of Comparative Example 1-1 in which the conventional technique was reproduced, a gelation phenomenon in which the whole reactant solidified after two weeks occurred, and measurement with a viscometer was impossible.

(2) Measurement of transmittance and haze

The transmittance (%) including the base film and the haze value (%) of the coating film prepared according to Example 1 and Comparative Example 1 were measured using a haze meter and shown in Table 3 below. The comparison between the preparation of the coating film immediately after the coating preparation and the preparation of the coating film after 2 weeks of storage.

(3) Measurement of Oxygen Transmission Rate (OTR)

The coating film prepared according to Example 1 and Comparative Example 1 was measured for the amount of oxygen permeating the coating film at a temperature of 23 ° C and 100% of O ₂ within a predetermined time using an oxygen permeability tester, . Similar to the optical properties, the coating films were prepared immediately after the coating preparation and the coating films were prepared two weeks after storage.

Transmissivity (%) Haze
(%) OTR
(g / m ² * day) Early after 2 weeks Early after 2 weeks Early after 2 weeks Example 1-1 89.68 89.72 4.97 4.86 0.244 0.280 Examples 1-2 89.78 89.90 4.16 4.22 0.708 0.675 Comparative Example 1-1 89.90 Not Coating 5.10 Not Coating 0.233 Not Coating Comparative Example 1-2 89.24 89.02 5.08 5.38 0.352 0.418 Comparative Example 1-3 89.18 89.19 4.99 5.24 0.413 0.556 Comparative Example 1-4 86.80 Not Coating 22.56 Not Coating 5.680 Not Coating Comparative Example 1-5 88.75 Not Coating 18.59 Not Coating 2.571 Not Coating Comparative Example 1-6 88.89 Not Coating 14.98 Not Coating 0.558 Not Coating Comparative Example 1-7 89.17 89.33 8.87 9.89 0.738 0.859

As shown in Table 3, the coating film for a food packaging material according to the present invention has a transmittance of about 89% and a haze value of about 4%, which is suitable for use as a food packaging material, has a constant transmittance and haze, and an oxygen permeability of 0.2 to 0.8 g / m < ² > * day. As shown in Table 3, it was confirmed that the initial physical properties of the coating were maintained except for the case where the coating was impossible due to the viscosity increase after 2 weeks. However, in the case of Comparative Examples 1-2 and 1-3 corresponding to the double inorganic alkali, and in the case of Comparative Example 1-7 in which the inorganic acid was applied, the time was shortened due to the ions Na ⁺ , K ⁺ , S ^2- Over time, a spot was formed on the outer surface of the film. Therefore, it is judged that the examples 1-1 and 1-2 employing an amine which is an organic alkali are suitable for a condition satisfying necessary properties while securing the storage stability of the coating agent.

Example  2 - as an additive Organic-alkali  Review by type

As a result of examination in Example 1, it was confirmed that the storage stability of the coating agent, the oxygen barrier property and the optical characteristics of the film can be attained when an organic alkali amine is applied. Therefore, in Example 2, the amine compound was specified for each kind and evaluated in the same manner as in Example 1. [

(1) Preparation of coating composition

As shown in the following Table 4, in Example 2, 1.33 g of the amine-based additive was diluted in 92 g of distilled water, and 8 g of whey protein (9410 WPI from Hilmar) was added to the reaction mixture at 600 rpm using a mechanical stirrer Slowly add and stir for 24 hours. After the stirring, 8 g of sorbitol was added to prepare a coating composition.

In Examples 2-1, 2-2 and 2-3, primary amines were used, in Examples 2-4 and 2-5, secondary amines were used, in Examples 2-6, 2-7 and 2-8, Tertiary amines were applied and compared.

In the case of Comparative Example 1-1, a coating composition was prepared as described above by a reaction in which the conventional technique was reproduced in the same manner.

Additive type Example 2-1 Monoethylamine Example 2-2 Monoethanolamine Example 2-3 Monoisopropanolamine Examples 2-4 Diethylamine Example 2-5 Diethanolamine Examples 2-6 Triethylamine Examples 2-7 Triethanolamine Examples 2-8 Dimethylethanolamine Comparative Example 1-1 No additive added

(2) Coating film production

The coating film was produced in the same manner as in Example 1.

Experimental Example 2

(1) Viscosity measurement

The storage stability of the coating compositions prepared according to Example 2 was evaluated in the same manner as in Example 1 and shown in Table 5.

Viscosity (cP) Viscosity change rate (%) Early after 2 weeks Example 2-1 20.4 19.5 4.41 Example 2-2 19.8 22.5 13.64 Example 2-3 2118 2097 0.99 Examples 2-4 12.8 13.9 8.59 Example 2-5 11.7 10.9 6.84 Examples 2-6 17.6 18.2 3.41 Examples 2-7 12.3 12.5 1.63 Examples 2-8 2325 2338 0.56 Comparative Example 1-1 1780 10,000 or more ^* -

As shown in Table 5, in the case of Comparative Example 1-1, in which the viscosity change rate after 2 weeks with respect to the initial viscosity was 15% or less and measurement was impossible due to an increase in viscosity after 2 weeks, The rate of change of viscosity is low and it can be seen that the storage stability of the coating agent can be secured when the amine is used. Although the initial viscosity varies depending on the type of amine, it can be seen that the initial viscosity remains the same over time.

(2) Measurement of transmittance and haze

The coating films prepared according to Example 2 were evaluated in the same manner as in Experimental Example 1, and the results are shown in Table 6.

(3) Measurement of Oxygen Transmission Rate (OTR)

The coating films prepared according to Example 1 and Comparative Example 1 were evaluated in the same manner as in Experimental Example 1 using an oxygen permeability tester.

Transmissivity (%) Haze
(%) OTR
(g / m ² * day) Early after 2 weeks Early after 2 weeks Early after 2 weeks Example 2-1 88.79 89.02 5.04 5.52 0.662 0.704 Example 2-2 89.57 89.51 4.50 4.24 0.458 0.432 Example 2-3 89.89 89.46 4.76 4.95 0.237 0.211 Examples 2-4 89.02 88.87 4.98 5.11 0.364 0.358 Example 2-5 89.55 89.42 4.16 4.25 0.381 0.407 Examples 2-6 89.40 88.99 4.85 4.69 0.525 0.558 Examples 2-7 89.68 89.35 4.97 4.82 0.244 0.284 Examples 2-8 89.78 89.42 4.16 4.20 0.708 0.689 Comparative Example 1-1 89.90 Not Coating 5.10 Not Coating 0.233 Not Coating

As shown in Table 6, in the case of Example 2 in which amine was applied as in the case of Example 1, the transmittance of the coating film was about 89% and the haze value was about 4%, which was suitable for use in food packaging materials, And an oxygen permeability of 0.2 to 0.8 g / m ² * day as well as excellent barrier properties. Therefore, a problem with the prior art is that a coating agent capable of being dispersed for a relatively long period of time can be prepared through securing the storage stability of the coating agent, and a coating agent can be prepared using an amine that exhibits viscosity suitable for a working process.

The features, structures, effects, and the like illustrated in the above-described embodiments can be combined and modified in other embodiments by those skilled in the art to which the embodiments belong. Accordingly, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims (9)

menstruum;
Which is selected from the group consisting of monoethylamine, monoethanolamine, monoisopropanolamine, diethylamine, diethanolamine, triethylamine, triethanolamine, dimethylethanolamine propylamine, dodecylamine, cyclohexylamine, ethylenediamine, pyrrolidine, N, N-Dimethyldodecylamine, N, N-Dimethyloctadecylamine and N, N-Dimethylcyclohexylamine. Amine-based additives including at least one type;
Natural products; And
A filler;
The amine-based additive is included in an amount of 10 to 30 parts by weight based on 100 parts by weight of the natural product,
Wherein the filler is contained in an amount of 90 to 110 parts by weight based on 100 parts by weight of the natural product, and has a barrier property.
delete delete delete The method according to claim 1,
The natural products were obtained from whey protein isolate (9410 WPI), concentrated whey protein (8000 WPC), soy protein isolate (SPI), rice protein isolate (RPI), oat protein isolate Proteins such as pea protein isolate (PPI), casein, sodium caseinate, corn zein, gelatin, wheat protein Gluten, Dextrins, Carrageenans, Wherein the coating composition comprises at least one selected from the group consisting of cellulose and cellulose.
The method according to claim 1,
Wherein the filler comprises at least one selected from the group consisting of sorbitol, fructose, sucrose, mannitol, and glycerol. Remelting coating composition.
The method according to claim 1,
Wherein the coating composition for food packaging material has a viscosity change ratio of 15% or less after 2 weeks with respect to the initial viscosity at a temperature of 15 to 25 캜 and 50 to 60%.
A base film;
And a barrier film formed on the base film and formed from a coating composition for food packaging material according to any one of claims 1 to 7.
The solvent is selected from the group consisting of monoethylamine, monoethanolamine, monoisopropanolamine, diethylamine, diethanolamine, triethylamine, triethanolamine, dimethylethanolamine propylamine, dodecylamine, cyclohexylamine, ethylenediamine, pyrrolidine, N, N-Dimethyldodecylamine, N, N-Dimethyloctadecylamine and N, N-Dimethylcyclohexylamine. Soluble amine-based additive;
Adding the natural product while stirring the solution; And
Adding a filler to the solution,
The amine-based additive is dissolved in 10 to 30 parts by weight with respect to 100 parts by weight of the natural product, the filler is added in an amount of 90 to 110 parts by weight,
Wherein the steps are carried out at room temperature.

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