KR102200771B1 - Eco friendly packing paper - Google Patents

Abstract

The present invention relates to an eco-friendly packaging, and more particularly, to an eco-friendly packaging for packaging a product that can be manufactured simply and does not require sterilization that can be naturally decomposed.
The eco-friendly wrapping paper according to the present invention is a barrier material of glassine paper located on the outermost side of the wrapping paper, a coating powder having moisture and oxygen barrier properties coated on one side of the glassine paper, and solvent-free on one side of the barrier material It may be made of a biodegradable material bonded by an adhesive and a solvent-free adhesive bonding the barrier material and the biodegradable material.

Description

Eco-friendly packaging {ECO FRIENDLY PACKING PAPER}

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

In general, packaging materials for packaging medicines, cosmetics, and health foods are storage base layers and thermoplastic sealing water on which aluminum foil or gas barrier film layers are installed on the surface printing layers such as paper, cellophane, polyester, nylon, polypropylene, etc. It is used for forming a bag-filled package product by forming a structure in which the stratum is further laminated, and after receiving the contents by forming various bags by heat sealing, and then heat sealing the inlet portion again.

The packaging material does not emit odor for the contained contents, and if the contents have aroma due to the inclusion of volatile medicinal ingredients, flavors or refreshing agents, the property does not damage the scent (preservation property) and does not reduce its aroma. Properties (non-adsorption of the directional) and low residual solvent properties are extremely required, and the content in the form of powder or grain is physically adsorbed to the inner surface and does not remain after opening (non-adhesive properties of the powder or grain), heat sealing property, especially Even if the content in the form of powder or granular material is slightly present in the sealing portion, good heat sealing is required (impurity sealing property) and the like.

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

Korean Patent Laid-Open Publication No. 10-2016-0142860 discloses a'recyclable material', and discloses a wrapping paper made of paper-sodium silicate-adhesive-film. In particular, the water-soluble adhesive is dissolved in water by using a water-soluble adhesive. A technique is disclosed that makes it possible to separate each material, the paper-sodium silicate-film, by making it possible to recycle each material.

Republic of Korea Patent Publication No. 10-1547926 discloses'an eco-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 a substrate made of coated or uncoated paper or kraft paper, and the upper surface of the substrate It consists of an oil-resistant coating layer formed on, 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 environmentally friendly factors.

The above prior art may prove its effect in exerting its function as an eco-friendly packaging, but Korean Patent Laid-Open No. 10-2016-0142860 requires a peeling process, and the material of each layer may not be an eco-friendly material. In addition, Korean Patent Publication No. 10-1547926 has increased manufacturing costs and difficulties due to the application of a multi-layer coating technology, and it is made of a multi-layer coating layer, making it impossible to completely implement oil resistance, water resistance, and moisture resistance.

: Korean Patent Application Publication No. 10-2016-0142860 : Korean Patent Publication No. 10-1547926

An object of the present invention for solving the above-described conventional problem is to provide an eco-friendly packaging paper that can be manufactured by a simple manufacturing method.

In addition, it is intended to provide eco-friendly packaging that can overcome manufacturing problems by targeting products that do not need sterilization or products in a dry state for packaging products, so that sterilization or waterproofing problems are not solved.

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 be made of a biodegradable material that is adhered to one side of the barrier material by a solvent-free adhesive, and a solvent-free adhesive that bonds 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 mixture of PLA (Poly Lactic Acid) or biopolymer 25 to 40% and PE (Polyethylene) 60 to 75%.

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, a product that can be produced 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 it is not necessary to solve the problem of sterilization or waterproofing. It is possible to overcome the problem, and it is possible to provide an eco-friendly packaging paper that can be biodegraded as a whole without the need for separation of the packaging paper.

1 is a cross-sectional view of an eco-friendly wrapping paper according to the present invention.
2A to 2C are test graphs comparing the disintegration rate and biodegradation rate between the biodegradable material used in the eco-friendly packaging paper according to the present invention and other materials.
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 the eco-friendly packaging according to the present invention.
5 is a measurement result of moisture permeability of the first sample of the eco-friendly packaging according to the present invention.
6 is a measurement result of moisture permeability of a second sample of the eco-friendly packaging according to the present invention.

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

Detailed descriptions of specific embodiments shown in the accompanying drawings will be read in connection with the accompanying drawings, and the drawings are considered to be part of the description of the entire invention. References to directions or directivity are for convenience of description only, and are not intended to limit the scope of the present invention in any way.

Specifically, terms indicating positions such as "bottom, top, horizontal, vertical, top, bottom, top, bottom, top, bottom", or derivatives thereof (for example, "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 description only, it is not required that the apparatus of the present invention be configured or operated in a specific direction.

In addition, terms indicating mutual coupling relationships between components such as "mounted, attached, connected, connected, interconnected", unless otherwise stated, refer to the state in which individual components are directly or indirectly attached or connected or fixed. It can mean, and this should be understood as a term encompassing not only a movably attached, connected, and fixed state, but also a non-movable state.

In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

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

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

Glassine paper (11) is a thin-leaf paper that is pressed with a super calender after taking measures to prevent pinholes from being beaten well-selected chemical pulp to a high degree of normality, and more specifically, a chemical pulp with a high degree of advancement of punctate. It refers to paper with a smooth surface and extremely dense, made by pressing as a raw material, especially by hanging it on a super calender after papermaking (抄紙).

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

In the case of general paper, there are many pinholes and the surface is not modified, so when coating the barrier material 12, the coating molecules of the barrier material are absorbed into the paper, resulting in poor coating power and high oxygen permeability and moisture permeability, so the efficiency as a wrapping paper Will degrade.

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

Glassine paper 11 forms a paper web, presses and pre-dry the paper web to produce paper, applies a film-formed product on both sides of the web, removes moisture from the film-formed 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 calendering process.

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

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

Glassine paper 11 may be manufactured from 40 to 150 g/m 2, and typically can be used as a base for a self-adhesive material and a release liner for a label, and in the present invention, oxygen permeability and moisture permeability as a final material for packaging paper. It is used as a material in the direction of lowering.

Glassine paper 11 used in the present invention is generally a typical value between 1.1 to 1.2 of density (base weight (ISO536)/thickness (ISO534)), and smoothness (ISO 5627) of the side to be coated with silicone is 900sec min, transparency ( ISO2470) is 48% min, Rizinus Cobb adsorption (ISO535) is 11 g/㎡ max, thickness standard deviation (ISO534) is 20㎛ max, pore (ISO11004) is <15,000 pm/Pas, and release force under the given conditions (coatweight : 1 g/m²) is satisfactory if @ 10 m/min <50 g.

As the barrier material 12, PVA (polyvinyl alcohol) or PVDC (polyvinylidene chloride) may be applied.

Since paper has very poor 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 inside of the wrapping paper into which the product is placed.

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

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 the polymerized PVA must be large, and syndiotactic diad content in stereoregularity. ) As the content of the PVA film 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, it is known that the number average polymerization degree is in the range of 500 to 4,000, and the physical properties vary widely depending on the molecular weight, saponification degree, and stereoregularity.

As the molecular weight of PVA decreases, the flexibility increases, and it becomes sensitive to moisture, so that it is easily dissolved, whereas the higher the molecular weight, the higher the alkali resistance, tensile strength, moisture resistance, and oxygen barrier properties. In addition, as the degree of saponification decreases, the characteristics appear when 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 can be manufactured to have contradicting properties such as water solubility and water resistance, environment resistance and decomposition ease, and hydrophilicity and lipophilicity by controlling molecular parameters.

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

The biodegradable material 14 is a starch material, a material that is widely known as an eco-friendly material, and in the present invention, it is positioned on the innermost side of the wrapping paper, and may be composed of a sheet in direct contact with 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.

Solvent free adhesive 13 can be any thermoplastic, elastomer, 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 (eg, but not limited to casein-based glues); Remoistenable hot melt; Polyamide hot melt; Reactive hot melt; Polyester; Polyamide; Polyurethane; Acrylic; Epoxy; silicon; Cyanoacrylate; Anaerobic adhesives; Phenolic; And polyimide.

The solvent-free adhesive 13 is 3 g/m 2 or less, and this amount cannot be an environmentally exclusive amount. In particular, as a solvent that does not use a liquid for dissolving substances such as gasoline or alcohol, it is widely used as an eco-friendly adhesive.

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 mixture of 25 to 40% PLA or a biopolymer and 60 to 75% PE.

The blended biodegradable material is about 97% biodegradable within about 370 days for 25% PLA or a material blended with biopolymer and 75% PE, and the material blended with 40% PLA or biopolymer and 60% PE is about 96% biodegradation 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 does not have a predetermined mechanical strength, so it is less valuable as a commercialization.

As a result of the actual test, if you test the disintegration rate (% Disentegrated) at 60~70℃, after 12 weeks, 100% PLA disintegrates 100%, and the mixed biodegradable material hardly changes, which has a very close relationship with the marketability as a packaging paper. have.

The mixed biodegradable material increases the strength of the biodegradable material, makes it possible to process the thickness thin, and increases the effect of PE.

Therefore, as the biodegradable material applied to the present invention, a mixed biodegradable material in which PE and PLA are mixed may be applied.

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

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

It means one week's time per point on the graph.

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

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

Referring to Figure 2c, #a is 100% biodegradable within 5 weeks, #c is continuously biodegraded in proportion to time and is 100% biodegradable in 37 weeks, #b has a 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 disintegration rate and rather a long period of biodegradation, and the mixed biodegradable material of the present invention has a low disintegration 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 the oxygen permeability of the second sample of the eco-friendly packaging according to the present invention.

As for the sample, a film with a thickness of 1 mm and an area of 50 cm 2 was measured with an oxygen permeability device of MOCON, and a graph was measured for 158 to 160 Hrs every hour.

In FIGS. 3A and 3B, the first sample (OTR B1 first) has the result of oxygen permeability of Transmission Rate 0.211794 cc/[㎡-day], and as in FIGS. 4A and 4B, the second sample (OTR B1 second) Has a transmission rate of 0.163676 cc/[㎡-day] of oxygen permeability.

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

As for the sample, a 1mm-thick film and an area of 50cm2 were measured with a moisture permeability device of MOCON, and a graph was measured for 45-46Hrs every hour.

The transmissiondms of the first sample (WVTR B1 first) is 1.054477 gm/[㎡-day], and the transmission rate of the second sample (WVTR B1 second) is 1.090722 gm/[㎡-day]. Have.

The above results of oxygen permeability and moisture permeability do not completely block oxygen and moisture, but prevents oxygen and moisture penetration of the packaged contents for a long time, reducing the possibility of product deterioration and allowing the product to be stored for a certain period of time. Can be seen.

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

That is, objects that can be packaged in the eco-friendly packaging of the present invention may be dried foods, dried products, and gel-like cosmetics, and liquid products are not targeted, and packaging papers for products that do not require sterilization. It may be suitable as

The ultimate purpose of the eco-friendly wrapping paper of the present invention is to provide an eco-friendly wrapping paper capable of storing dried products as a main object.

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

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

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

Claims (4)

Surface-modified glassine paper located on the outermost side of the wrapping paper, and
A barrier material that is coated on one side of the glassine paper and is one of Poly Vinyl Alcohol (PVA) or Poly Vinylidene Chloride (PVDC) of a coating powder having moisture and oxygen barrier properties,
A biodegradable material adhered to the barrier material by a solvent-free adhesive,
Consisting of a solvent-free adhesive bonding the barrier material and the biodegradable material,
The biodegradable material is a mixed material in which 25 to 40% of biopolymer and 60 to 75% of PE (polyethylene) are mixed, eco-friendly packaging. delete delete delete

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