KR20220042502A - Eco-friendly packaging that does not require sterilization - Google Patents

Abstract

The present invention relates to an eco-friendly packaging paper, and more specifically, to the eco-friendly packaging paper for packaging a product, which is simply manufactured, is naturally decomposed, and does not require sterilization. The eco-friendly packaging paper according to the present invention comprises: a glassine paper located on an outermost side of the packaging paper; a barrier material of coating powder having moisture and oxygen blocking properties coated on one surface of the glassine paper; a biodegradable material adhered to one surface of the barrier material by a solvent-free adhesive; the solvent-free adhesive which attaches the barrier material to the biodegradable material.

Description

Eco-friendly packaging that does not require sterilization

The present invention relates to an eco-friendly packaging paper, and more particularly, to an eco-friendly packaging paper for packaging a product that can be manufactured simply and does not require sterilization that can be naturally decomposed.

In general, packaging materials for pharmaceuticals, cosmetics, and health food packaging materials include a storage base layer with an aluminum foil or gas barrier film layer installed on a printed surface layer of paper, cellophane, polyester, nylon, polypropylene, etc., and a thermoplastic sealing water. It is used to form a bag-filled package product by heat-sealing the inlet again after accommodating the contents by forming a structure in which the paper layers are further laminated, and then forming various bag shapes by heat sealing. The packaging material does not give off odor to the contents contained therein, and if the contents have aromaticity due to the inclusion of volatile active ingredients, flavoring agents, or refreshing agents, the property does not impair the fragrance (preservative) and does not reduce the direction. Properties (non-adhesiveness of direction) and, furthermore, low solvent residual properties are extremely required, and properties in which powder or granular content is physically adsorbed on the inner surface and does not remain after opening (non-adhesive properties of powder or granules), heat sealing properties Even if a small amount of powder or granular content exists in the sealing portion, it is required that good heat sealing is possible (impurity sealing property) and the like. In addition, in recent years, environmentally friendly wrapping paper has been developed due to environmental problems, and the environmentally friendly wrapping paper is made of a material that can be decomposed in nature. Korean Patent Application Laid-Open No. 10-2016-0142860 discloses 'recycled material' and discloses a wrapping paper made of paper-sodium silicate-adhesive-film, and in particular, the adhesive uses a water-soluble adhesive, so that the water-soluble adhesive is dissolved in water Disclosed is a technology that makes it possible to separate each material, paper-sodium silicate-film, by making it possible to recycle each material. Korean Patent No. 10-1547926 discloses 'an eco-friendly water-soluble food packaging paper using multi-layer coating technology having oil resistance, water resistance, moisture resistance and heat sealing properties', which is a substrate made of coated or uncoated paper or kraft paper, and an upper surface of the substrate It consists of an oil-resistant coating layer formed on the surface, a water-resistant coating layer formed on the upper surface of the oil-resistant coating layer, and a moisture-proof and heat-sealing coating layer formed on the upper surface of the water-resistant coating layer, and the materials of each coating layer are eco-friendly elements. Although the above prior arts can prove their effectiveness in exhibiting the function as an eco-friendly packaging paper, Korean Patent Publication No. 10-2016-0142860 requires a peeling process, and the material of each layer is defective in that it may not be an eco-friendly material. In addition, Korean Patent Registration No. 10-1547926 No. 10-1547926 has not only increased manufacturing cost and difficulty as the multi-layer coating technology is applied, but also consists of a multi-layer coating layer, so it is impossible to completely implement oil resistance, water resistance and moisture resistance.

An object of the present invention for solving the above-mentioned conventional problems is to provide an eco-friendly packaging paper that can be manufactured by a simple manufacturing method. In addition, it is intended to provide an eco-friendly packaging paper that can overcome manufacturing problems by targeting products that do not require sterilization or products in a dry state for products that can be packaged, so that there is no need to solve sterilization or waterproof problems.

The eco-friendly packaging paper according to the present invention for achieving the above object includes a glassine paper positioned on the outermost side of the packaging paper, a barrier material of a coating powder having moisture and oxygen barrier properties coated on one side of the glassine paper, and the It may consist of a biodegradable material adhered to one surface of the barrier material by a solvent-free adhesive, and a solvent-free adhesive bonding the barrier material and the biodegradable material. Here, it is preferable that the barrier material is selected from polyvinyl alcohol (PVA) or polyvinylidene chloride (PVDC). Here, it is preferable that the biodegradable material is a mixed material in which 25 to 40% of PLA (Poly Lactic Acid) or biopolymer and 60 to 75% of PE (Polyethylene) are mixed. Here, the product packaged in the eco-friendly packaging may be limited to dry food or cosmetics.

According to the configuration of the present invention described above, the product that can be manufactured by a simple manufacturing method and can be packaged is a product that does not require sterilization or a product in a dry state, so that there is no need to solve the sterilization or waterproof problem, so that the manufacturing It is possible to overcome the problems, and it is possible to provide an eco-friendly packaging paper that can be completely decomposed without the need for separation of the packaging paper.

References to directions or directions are for convenience of description only, and are not intended to limit the scope of the present invention in any way. Specifically, terms indicating a position such as "down, up, horizontal, vertical, upper, lower, upward, downward, upper, lower", or derivatives thereof (eg, "horizontally, downwardly, upwardly") etc.) should be understood with reference to both the drawings and related descriptions being described. In particular, since these relative words are only for convenience of description, it is not required that the device of the present invention be configured or operated in a specific direction. In addition, terms indicating a mutual coupling relationship between components such as "mounted, attached, connected, connected, interconnected" refer to a state in which individual components are directly or indirectly attached, connected, or fixed, unless otherwise specified. can mean, and this should be understood as a term encompassing not only a movably attached, connected, fixed state, but also a non-movable state. In describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted. The eco-friendly wrapping paper according to the present invention may be made of glassine paper, a barrier material, a solvent-free adhesive, and a biodegradable material. Glassine paper is a thin paper paper pressurized with a super calender after finely selected chemical pulp is highly refined to prevent pinholes. More specifically, it is made from highly advanced chemical pulp This means paper with a smooth and extremely dense surface, which is made by putting it on a super calender and pressurizing it after papermaking (抄紙). The selection of glassine paper as the paper material used for the eco-friendly packaging paper of the present invention is based on data obtained through repeated experiments that the coating adhesion of the barrier material is very excellent by surface modification. In the case of general paper, since there are many pinholes and the surface is not modified, when a barrier material is coated, the coating molecules of the barrier material are absorbed into the paper, the coating power decreases, and the oxygen permeability or moisture permeability is high, which lowers the efficiency as a wrapping paper. do. Therefore, in order to increase the coating power of the barrier material and lower the oxygen permeability or moisture permeability, the surface modification of the paper is essential. choose that Glassine paper produces paper by forming a paper web and pressing and pre-drying the paper web, applying a film-forming product to both sides of the web, removing moisture from the film-forming product in a post-drying process, and forming a film on the surface of the web It is fabricated by passing the web with the formed article through an online calendering process. Glassine paper is a very dense, highly resistant and soft paper and is resistant to air, water and oil. The typical properties of glassine paper are achieved by a high level of fiber refining, surface closing with film-forming products and calendering. Glassine paper may be manufactured from 40 to 150 g/m 2 , and can typically be used as a base for a release liner for self-adhesive materials and labels, and in the present invention, as a paper material for wrapping paper, the direction of lowering oxygen permeability and moisture permeability used as a material. The glassine paper used in the present invention is generally a typical value between the density (basis weight (ISO536)/thickness (ISO534)) 1.1 to 1.2, the smoothness (ISO 5627) of the side to be silicone coated is 900 sec min, and the transparency (ISO2470) is 48% min, Rizinus Cobb adsorption (ISO535) at 11 g/m2 max, thickness standard deviation (ISO534) at 20 μm max, voids (ISO11004) at < 15,000 pm/Pas, release force (coatweight: 1 g) under given conditions /m2) is satisfactory if about @ 10 m/min < 50 g. As the barrier material 12 , polyvinyl alcohol (PVA) or polyvinylidene chloride (PVDC) may be applied. Since paper has very weak moisture barrier properties or oxygen barrier properties, there is a need to add a barrier material to the inner side of the paper, which is the inner side of the packaging paper containing the product. In the present invention, PVA or PVDC material is selectively used as a barrier material, and a barrier material is selected to be coated on glassine paper. PVA is mainly produced by preparing PVAc from vinyl acetate through emulsion polymerization and then hydrolyzing it with alkali or acid. In order for PVA to exhibit high strength, high modulus of elasticity, and heat resistance, the degree of saponification, molecular weight, and stereoregularity of polymerized PVA must be large, and syndiotacticdiad content in stereoregularity As the content of PVA increases, the prepared PVA film has high strength and high modulus of elasticity, and heat resistance, moisture resistance and hot water resistance increase. In the case of commercialized PVA, the number average degree of polymerization is in the range of 500 to 4,000, and it is known that physical properties vary widely depending on molecular weight, degree of saponification, and stereoregularity. As the molecular weight of PVA decreases, flexibility increases, and it becomes more sensitive to moisture and dissolves easily, while as the molecular weight increases, alkali resistance, tensile strength, moisture resistance and oxygen barrier properties increase. In addition, as the degree of saponification decreases, the molecular weight decreases, and the increase in the degree of saponification has characteristics similar to those of high molecular weight PVA. PVA has very unique characteristics among synthetic polymers, and by controlling molecular parameters, it can be manufactured to have opposite properties such as water solubility and water resistance, environmental resistance and easy decomposition, and hydrophilicity and lipophilicity. As such, PVA can have hydrophilicity, environmental resistance, and easy decomposition, so it is a material that can be decomposed naturally in a natural environment together with paper materials, so it can be used as a coating agent to supplement the moisture barrier and oxygen barrier properties, which are the disadvantages of paper. The biodegradable material is a starch material, which is widely known as an eco-friendly material, and in the present invention, it is placed on the innermost side of the wrapping paper and may be composed of a sheet in direct contact with the product. The barrier material and the biodegradable material are bonded by an adhesive, and a solvent-free adhesive may be used as the adhesive. The solvent-free adhesive can be any thermoplastic, elastomeric, or thermosetting adhesive. Non-limiting examples of suitable adhesives include vegetable glues (eg, starch-based glues) resin-based glues (eg, emulsions of ethylene vinyl acetate or polyvinyl acetate); Animal/protein glues (such as but not limited to casein-based glues) remoistenable hot melt polyamide hot melt reactive hot melt polyester polyamide polyurethane acrylic epoxy silicone cyanoacrylate anaerobic adhesives phenolic and polyimide can be heard The solvent-free adhesive 13 is used in an amount of 3 g/m 2 or less, and this amount cannot be an environmentally exclusive amount. Here, as the biodegradable material, a mixed material or a biopolymer material other than PLA may be used. The biodegradable material of the present invention may be a mixture of 25 to 40% PLA or biopolymer and 60 to 75% PE. As for the mixed biodegradable material, a material containing 25% PLA or biopolymer and 75% PE is 97% biodegradable within about 370 days, and a material containing 40% PLA or biopolymer and 60% PE is approx. 96% biodegradable test results can be obtained within 349 days, and 100% PLA is biodegradable within 7 days. In the case of 100% PLA, the biodegradation time is very short, so it is extremely eco-friendly, but the disentegrated rate, which is a property of the film, is small, and it does not have a predetermined value of mechanical strength, so the value as a commercialization is reduced. As a result of the actual test, when testing the % Disentegrated at 60~70℃, 100% PLA is 100% disintegrated after 12 weeks, and the mixed biodegradable material has little change. there is. The mixed biodegradable material increases the strength of the biodegradable material, it is possible to process it to a thin thickness, and results in increasing the effect of PE. Therefore, the biodegradable material applied to the present invention may be a mixed biodegradable material in which PE and PLA are mixed. It is a test graph comparing the decay rate and biodegradation rate of the biodegradable material used for the eco-friendly packaging according to the present invention and other materials. It shows the natural decay rate (% Disentegreted) at 60-70℃, and CO2 measurement by ASTM-D 5338 standard test method under the conditions of composting, aerobic microorganisms, temperature 58±2℃, humidity 50%, light blocking or spectral illumination ( biodegradation rate), and the measurement of carbon content (biodegradation rate) containing CO2 and CH4 by ASTM-D 5511 standard test method under the conditions of landfill, anaerobic microorganisms, temperature 52±2℃, light blocking or spectral illumination . Each point on the graph means the time of one week. Sample #a is a mixed biodegradable material of the present invention (25% PLA or biopolymer + 75% PE), sample #b is 100% PLA, and sample #c is 25% biodegradable material of the present invention and LLDP 75% is a mixed sample. It can be seen that after 12 weeks, sample #b is 100% decayed, and samples #a and #c have little change. It can be seen that #a is 100% biodegradable within 5 weeks, #c is continuously biodegraded in proportion to time, and #b is 100% biodegradable in 37 weeks. #a is 100% biodegradable within 5 weeks, #c is biodegradable continuously in proportion to time and is 100% biodegradable in 37 weeks, #b has a relatively low biodegradation rate and less than 10% biodegradation rate after 37 weeks. there is. As can be seen from the above results, it can be seen that 100% PLA has a high disintegration rate and rather a long biodegradation period, and the mixed biodegradable material of the present invention has a low disintegration rate and a very high biodegradation rate. It is the oxygen permeability measurement result of the first sample of the eco-friendly wrapping paper according to the present invention, and the oxygen permeability measurement result of the second sample of the eco-friendly wrapping paper according to the present invention. The sample is a film having a thickness of 1 mm and an area of 50 cm 2 measured by oxygen permeability equipment of MOCON, and shows a graph measured for 158 to 160 Hrs every hour. The first sample (OTR B1 first) had an oxygen permeability of 0.211794 cc/[㎡-day] at the transmission rate, and the second sample (OTR B1, the second) had an oxygen transmission rate of 0.163676 cc/[㎡-day] at the transmission rate. has It is the moisture permeability measurement result of the first sample of the eco-friendly wrapping paper according to the present invention, and the moisture vapor permeability measurement result of the second sample of the eco-friendly wrapping paper according to the present invention. As for the sample, a film having a thickness of 1 mm and an area of 50 cm 2 was measured with a moisture permeability device of MOCON, and the graph is measured for 45 to 46 Hrs every hour. The first sample (WVTR B1 first) has a transmission rate of 1.054477 gm/[㎡-day], and the second sample (WVTR B1 second) has a transmission rate of 1.090722 gm/[㎡-day]. have The results of oxygen permeability and moisture permeability as described above do not completely block oxygen and moisture, but they prevent oxygen and moisture permeation of packaged contents for a long time, thereby reducing the possibility of product deterioration and allowing the product to be stored for a certain period of time. can be known Based on these results, the products that can be packaged in the eco-friendly packaging of the present invention may not be all products, but only products that can be stored under certain conditions. That is, the object that can be packaged in the eco-friendly packaging of the present invention may be dry food, a product in a dry state, or a cosmetic type in a gel state. may be suitable as The eco-friendly wrapping paper of the present invention has an ultimate object to provide an eco-friendly wrapping paper that can be stored for dry goods as a main target. Although the present invention as described in detail above has been described based on limited embodiments, the present invention is not limited thereto, and the technical idea and patent of the present invention are provided by those of ordinary skill in the art to which the present invention pertains. Various modifications and variations are possible within the scope of equivalents of the claims. However, it is clear that such simple modifications and variations cannot depart from the scope of the present invention.

Claims (1)

Glassine paper located on the outermost side of the wrapping paper, a barrier material of a coating powder coated on one side of the glassine paper and having moisture and oxygen barrier properties, and a solvent-free adhesive on one surface of the barrier material An eco-friendly wrapping paper comprising a biodegradable material to be adhered, and a solvent-free adhesive for adhering the barrier material and the biodegradable material.