KR20200093101A - Eco friendly packing paper - Google Patents

Abstract

The present invention relates to an eco-friendly wrapping paper. More particularly, the present invention relates to an eco-friendly wrapping paper for packaging a product that can be manufactured simply and does not require sterilization by being naturally decomposed. The eco-friendly wrapping paper according to the present invention comprises: a glassine paper positioned on an outermost side of the wrapping paper; a barrier material coated on one surface of the glassine paper and having moisture and oxygen barrier properties; a biodegradable material adhered to one side of the barrier material by a solvent-free adhesive; and the solvent-free adhesive bonding the barrier material and the biodegradable material.

Description

ECO FRIENDLY PACKING PAPER}

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

In general, packaging materials for forming bags for pharmaceuticals, cosmetics, and health foods are made of aluminum foil or a gas barrier film layer on a surface printing layer such as paper, cellophane, polyester, nylon, and polypropylene, and a thermoplastic sealant. It is used to form a structure in which the layers are further stacked, form various bags with heat sealing, and then receive the contents, and then heat seal the inlet again to form a bag-filled packaged product.

The packaging material does not smell badly about the contents it contains, as well as the properties that do not impair its scent when the contents have aromaticity due to the inclusion of volatile drug ingredients, flavors, or refreshing agents (compensation), and do not reduce their orientation. Properties (non-adsorption in the direction), furthermore, low residual solvent properties are extremely required, and the properties of the powdery substance are physically adsorbed on the inner surface and do not remain after opening (non-adhesiveness of the powder), heat sealing properties, especially Even if the contents in the powder form are slightly present in the sealing portion, good heat sealing (impurity sealing property) or the like is required.

In addition, in recent years, due to environmental problems, eco-friendly packaging has been developed, and such eco-friendly packaging is made of a material that can be naturally decomposed.

Republic of Korea Patent Publication No. 10-2016-0142860 discloses a'recyclable material', discloses a wrapping paper made of paper-sodium silicate-adhesive-film, in particular, by using a water-soluble adhesive, the water-soluble adhesive is dissolved in water Disclosed is a technique that allows each material to be recycled by making it possible to separate each material, paper-sodium silicate-film.

Republic of Korea Patent Publication No. 10-1547926 discloses an'environment-friendly water-soluble food packaging paper using a multi-layer coating technology having oil resistance, water resistance, moisture resistance, and heat sealing properties,' which is composed of a coated or non-coated paper or kraft paper and a top surface of the substrate It consists of an oil-resistant coating layer formed on, an oil-resistant coating layer formed on the top surface of the oil-resistant coating layer, and a moisture-proof and heat-sealing coating layer formed on the top surface of the water-resistant coating layer, and the materials of each coating layer are environmentally friendly elements.

The above prior arts can be proven effective in exerting a function as an eco-friendly wrapping paper, but Korean Patent Publication No. 10-2016-0142860 requires a peeling process, and the defect that the material of each layer may not be an eco-friendly material There is, and the Republic of Korea Patent Publication No. 10-1547926, as well as the cost and difficulty of manufacturing in accordance with the application of the multi-layer coating technology, is made of a multi-layer coating layer, it is impossible to completely implement the oil resistance, water resistance and moisture resistance.

: Republic of Korea Patent Publication No. 10-2016-0142860 : Republic of Korea Registered Patent Publication No. 10-1547926

The problem of the present invention for solving the above-described conventional problems is to provide an environmentally friendly packaging that can be produced by a simple manufacturing method.

In addition, by providing products that can be packaged for products that do not require sterilization or products that are dry, there is no need to solve sterilization or waterproofing problems, thereby providing an environmentally friendly packaging that can overcome manufacturing problems.

The eco-friendly wrapping paper according to the present invention for achieving the above object, the glassine paper located on the outermost side of the packaging paper, and the barrier material of the coating powder having moisture and oxygen barrier properties coated on one surface of the glassine paper, and It may be made of a biodegradable material that is adhered to a surface of the barrier material by a solvent-free adhesive, and a solvent-free adhesive that adheres the barrier material and the biodegradable material.

Here, the barrier material is preferably selected from PVA (poly vinyl alcohol) or PVDC (poly vinylidene chloride).

Here, the biodegradable material is preferably a mixed material in which 25-40% of PLA (Poly Lactic Acid) or bio-polymer and 60-75% 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 above-described configuration of the present invention, a product that can be manufactured by a simple manufacturing method and that 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 problem of sterilization or waterproofness. It is possible to overcome the problem, and it is possible to provide an environmentally friendly packaging that can be completely decomposed entirely without the need for separation of the packaging.

1 is a cross-sectional view of an eco-friendly wrapping paper according to the present invention.
2A to 2C are test graphs comparing biodegradability and biodegradability between biodegradable materials and other materials used in eco-friendly packaging according to the present invention.
3A and 3B are results of measuring oxygen permeability of the first sample of the eco-friendly packaging according to the present invention.
4A and 4B are results of measuring oxygen permeability of a second sample of an eco-friendly packaging according to the present invention.
5 is a result of measuring the moisture permeability of the first sample of the eco-friendly packaging according to the present invention.
6 is a result of measuring the moisture permeability of the second sample of the eco-friendly packaging according to the present invention.

Hereinafter, the structure and effect of the eco-friendly wrapping paper according to the present invention will be described with reference to the accompanying drawings.

The detailed description of specific embodiments shown in the accompanying drawings will be read in connection with the accompanying drawings, and the drawings are regarded as part of the description of the entire invention. References to orientation or directivity are for convenience of explanation only and are not intended to limit the scope of the present invention in any way.

Specifically, "down, up, horizontal, vertical, upper, lower, upward, downward, upper, lower" and the like, or a derivative thereof (eg, "horizontal, downward, upward") Etc.) should be understood with reference to all the drawings and related descriptions being described. In particular, since these relative words are for convenience of explanation only, it is not required that the device of the present invention be configured or operated in a specific direction.

In addition, the term "removed, attached, connected, continued, interconnected", etc., refers to a mutual coupling relationship between components, unless otherwise stated, directly or indirectly the individual components are attached or connected or fixed. It can mean, and it should be understood as a term encompassing not only a movable, attachable, connected, fixed state, but also a non-movable state.

It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible, even if they are displayed on different drawings. In addition, in describing the present invention, when it is determined that detailed descriptions of related well-known structures or functions may obscure the subject matter of the present invention, detailed descriptions thereof will be omitted.

1 is a cross-sectional view of an eco-friendly wrapping paper according to the present invention.

As shown in Figure 1, the eco-friendly packaging according to the present invention can be made of glassine paper (Glassine paper, 11), barrier material (PVA, PLDC, 12), solvent-free adhesive 13 and biodegradable material 14 have.

Glassine (11) is a thin paper that is pressed with a super calendar after measures to prevent pinholes due to the high degree of normal deficiency of well-selected chemical pulp, and more specifically, chemical pulp that has advanced point melting (상) highly It is made of paper by making it pressurized by hanging it on a super calendar after making paper, and it means a paper with a smooth and extremely dense surface.

The choice of glassine 11 for the paper material used in the eco-friendly packaging of the present invention is due to data obtained by repeated experiments that the coating adhesion of the barrier material 12 is very good by surface modification.

In the case of general paper, when the barrier material 12 is coated because there are many pinholes and the surface is not modified, the coating molecules of the barrier material are absorbed by the paper and the coating power is lowered and the oxygen permeability or moisture permeability is high, resulting in efficiency as a wrapping paper. Will lower it.

Therefore, in order to increase the coating power of the barrier material 12 and lower the oxygen permeability or moisture permeability, the surface modification of the paper is essential, and there is no pinhole among the surface-modified paper, and the smooth and dense glassine paper of the present invention is a wrapping paper. Choose to apply to.

Glassine 11 forms a paper web, produces paper by pressing and pre-drying the paper web, applies a film-forming product to both sides of the web, removes moisture from the film-forming product in a post-drying process, and It is produced by passing a web having a film-forming product on its surface through an online calendaring process.

Glassine 11 is very dense, highly resistant and soft paper, and resistant to air, water and oil.

Typical properties of glassine paper are achieved by high levels of fiber refining, surface closing by film forming and calendering.

Glassine 11 may be made from 40 to 150 g/m 2, and may be used as a base for release liners for self-adhesive materials and labels, and in the present invention, oxygen permeability and moisture permeability as a final material for packaging. It is used as a material to lower the direction.

The glassine 11 used in the present invention is typically a density (normal (ISO536)/thickness (ISO534)) between 1.1 and 1.2, and the smoothness of the side to be coated with silicon (ISO 5627) is 900 sec min, transparency ( ISO2470) is 48% min, Rizinus Cobb adsorption (ISO535) is 11 g/m 2 max, thickness standard deviation (ISO534) is 20 μm max, void (ISO11004) is <15,000 pm/Pas, release force (coatweight at given conditions) : 1 g/m 2) is satisfactory if @ 10 m/min <50 g or so.

The barrier material 12 may be PVA (Poly Vinyl Alcohol) or PVDC (Poly Vinylidene Chloride).

Since paper is very weak in moisture barrier and 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 in which the product enters.

In the present invention, PVA or PVDC material is selectively used as the barrier material 12, and a coating of the barrier material 12 is selected for the glassine 11.

PVA is mainly prepared by preparing PVAc from vinyl acetate through emulsion polymerization and then hydrolyzing it with alkali or acid.

In order for the PVA to exhibit high strength, high modulus, and heat resistance, the degree of saponification, molecular weight, and stereoregularity of the polymerized PVA must be large. ) Content increases, the prepared PVA film has high strength and high elastic modulus, and heat resistance, moisture resistance and heat resistance increase.

In the case of commercialized PVA, the number average polymerization degree is in the range of 500 to 4,000, and the molecular weight, saponification degree, and physical properties are known to vary widely due to stereoregularity.

As the molecular weight of PVA decreases, flexibility increases, and it becomes sensitive to water and readily dissolves, whereas as the molecular weight increases, alkali resistance, tensile strength, moisture resistance, and oxygen blocking property increase. In addition, as the degree of saponification decreases, it has properties that appear when the molecular weight decreases, and the increase in saponification degree has properties similar to those of high molecular weight PVA.

PVA has a very unique characteristic among synthetic polymers and can be manufactured to have opposite properties such as water solubility and water resistance, environmental resistance and degradability, and hydrophilicity and lipophilicity by controlling molecular parameters.

As such, since PVA can have hydrophilicity, environmental resistance, and ease of decomposition, it is a material that can be decomposed naturally in a natural environment along with paper materials, so it can be used as a coating agent to compensate for the moisture barrier properties and oxygen barrier properties of paper.

The biodegradable material 14 is a starch material and is a material widely known as an eco-friendly material. In the present invention, the biodegradable material 14 is positioned on the innermost surface of the wrapping paper, and may be composed of a sheet directly contacting the product.

The barrier material 12 and the biodegradable material 14 are adhered by an adhesive, and a solvent-free adhesive 13 may be used as the adhesive.

The solvent-free adhesive 13 can be any thermoplastic, elastomeric, or thermosetting adhesive.

Non-limiting examples of suitable adhesives include vegetable glue (eg starch-based glue); Resin-based glues (for example, emulsions of ethylene vinyl acetate or polyvinyl acetate); Animal/protein glue (eg, but not limited to casein-based glue); Remostenable hot melt; Polyamide hot melt; Reactive hot melt; Polyester; Polyamide; Polyurethane; Acrylic; Epoxy; silicon; Cyanoacrylate; Anaerobic adhesive; Phenolic; And polyimide.

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, and is particularly used as an eco-friendly adhesive as a solvent that does not use a liquid for dissolving substances such as gasoline or alcohol.

Here, the biodegradable material 14 may be a mixed material or a biopolymer material other than PLA.

The biodegradable material 14 of the present invention may be a mixed material of 25 to 40% PLA or biopolymer and 60 to 75% PE.

The mixed biodegradable material is 25% PLA or biopolymer and 75% PE mixed material is 97% biodegradable within about 370 days, and 40% PLA or biopolymer and 60% PE mixed material is about It is possible to obtain a test result that is 96% biodegradable within 349 days, and 100% PLA biodegrades within 7 days.

In the case of 100% PLA, the biodegradation time is very short, so it is extremely environmentally friendly, but the disintegration rate, which is a property of the film, is small and does not have a mechanical strength of a predetermined value, thereby deteriorating its value as commercialization.

As a result of the actual test, when testing the disintegration rate (% Disentegrated) at 60~70℃, 100% PLA decays 100% after 12 weeks, and the mixed biodegradable material is almost unchanged, which is very closely related to the merchandise as packaging. have.

The mixed biodegradable material increases the strength of the biodegradable material, makes it possible to process the thickness thinly, and shows the result of 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.

2A to 2C are test graphs comparing biodegradability and biodegradability between biodegradable materials and other materials used in eco-friendly packaging according to the present invention.

Figure 2a shows the natural disintegration rate (% Disentegreted) at 60-70 ℃, Figure 2b is composting, aerobic microorganisms, temperature 58±2 ℃, humidity 50%, light blocking or spectroscopic light conditions ASTM-D 5338 standard CO2 measurement (biodegradation rate) is shown as a test method, and FIG. 2C shows carbon containing CH2 and CH4 in the ASTM-D 5511 standard test method under conditions of landfill, anaerobic microorganisms, temperature of 52±2°C, light blocking or spectral illumination. It shows a small amount of measurement (biodegradation rate).

It means the time of one week per point on the graph.

Sample #a is a blended biodegradable material of the present invention (PLA or biopolymer 25% + PE 75%), sample #b is 100% PLA, sample #c is 25% biodegradable material of the present invention and LLDP 75% is a mixed sample.

Referring to FIG. 2A, it can be seen that after 12 weeks, sample #b collapses 100%, and samples #a and #c hardly change.

2B, it can be seen that #a is 100% biodegradable within 5 weeks, #c is continuously biodegradable in proportion to time, and #b is 100% biodegradable in 37 weeks.

Referring to Figure 2c, #a is 100% biodegradable within 5 weeks, #c is continuously biodegradable in proportion to time, 100% biodegradable in 37 weeks, #b is relatively low biodegradation rate and biodegradation rate after 37 weeks It can be seen that it is less than 10%.

As can be seen from the above results, it can be seen that 100% PLA has a high decay rate and a rather long biodegradation period, and the mixed biodegradable material of the present invention has a low decay rate and a very high biodegradation rate.

3A and 3B are results of measuring oxygen permeability of the first sample of the eco-friendly packaging according to the present invention, and FIGS. 4A and 4B are results of measuring oxygen permeability of the second sample of the eco-friendly packaging according to the present invention.

The sample has a thickness of 1 mm, an area of 50 cm 2, and the film is measured with an oxygen permeability equipment of MOCON, and shows a graph measured for 158 to 160 Hrs every hour.

3A and 3B, the first sample (OTR B1 first) has a result of oxygen permeability of Transmission Rate 0.211794 cc/[m 2 -day], and as in FIGS. 4A and 4B, the second sample (OTR B1 second) Has a transmission rate of 0.163676 cc/[m 2 -day] and an oxygen permeability result.

5 is a result of measuring moisture permeability of the first sample of the eco-friendly packaging according to the present invention, and FIG. 6 is a result of measuring moisture permeability of the second sample of the eco-friendly packaging according to the present invention.

The sample is a 1 mm thick, 50 cm 2 area film measured by MOCON's moisture permeability equipment, and displays graphs measured for 45 to 46 Hrs on an hourly basis.

Transmissiondms of the first sample (WVTR B1 first) has a result of moisture permeability of 1.054477 gm/[㎡-day], and results of the moisture permeability of Transmission Rate 1.090722 gm/[㎡-day] of the second sample (WVTR B1 second). Have

The result of the above oxygen permeability and moisture permeability does not completely block oxygen and moisture, but it prevents oxygen penetration and moisture penetration of the packaged contents for a long time, thereby reducing the possibility of product deterioration and storage for a certain period of time. Can be seen.

Based on these results, products that can be packaged in the eco-friendly packaging of the present invention can be the only product that can be stored under certain conditions, not all products.

That is, the object that can be packaged in the eco-friendly packaging of the present invention can be a dry food, a dry product, a gel-type cosmetic product, and a liquid product is not a target, and a packaging paper of a product that does not require sterilization As may be suitable.

The eco-friendly packaging of the present invention has an ultimate purpose to provide an eco-friendly packaging that can be stored as a main product in a dry state.

Although the present invention as described in detail above has been described based on limited embodiments and drawings, the present invention is not limited by this, and the technology of the present invention by those skilled in the art to which the present invention pertains Various modifications and variations are possible within the scope of the idea and the claims.

However, it is clear that such simple modifications and variations cannot deviate from the scope of the present invention.

11: Glassine
12: barrier material
13: solvent-free adhesive
14: biodegradable material

Claims (4)

Glassine paper located on the outermost side of the wrapping paper,
A coating material coated on one surface of the glassine paper and having moisture and oxygen barrier properties, and a barrier material,
A biodegradable material adhered to one side of the barrier material by a solvent-free adhesive,
Eco-friendly packaging made of a solvent-free adhesive that bonds the barrier material and the biodegradable material. According to claim 1,
The barrier material is selected from PVA (Poly Vinyl Alcohol) or PVDC (Poly Vinylidene Chloride), eco-friendly packaging. According to claim 1,
The biodegradable material is an environmentally friendly wrapping paper, which is a mixed material of 25 to 40% of PLA (Poly Lactic Acid) or bio polymer and 60 to 75% of PE (Polyethylene). According to claim 1,
The product packaged in the eco-friendly packaging is dry food or cosmetics, eco-friendly packaging.

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