KR20080056780A - Paper packing and method for manufacturing the same - Google Patents

Abstract

A paper packing material and a manufacturing method for the same are provided to have excellent strength while having a thin thickness and to have a relatively high specific gravity to sustain the weight of a product. A manufacturing method of a paper packing material includes the steps of: (a) preparing an original paper; (b) processing the original paper in a desired shape; (c) forming a coating layer by applying a coating agent in which polymer consisting of 45-55 weight% of methyl methacrylate and 45-55 weight% of butyl acrylate, water and an emulsifier are mixed; (d) forming an adhesion layer by applying an adhesive consisting of 9.3 weight% of sodium oxide, 29.2 weight% of silicon dioxide, 61.48 weight% of water, 0.01 weight% of water insoluble matter and 0.01 weight% of diiron trioxide on the coating layer; and (e) adhering the surface of the original paper on which the adhesion layer is formed to the other original paper.

Description

Paper packing and method for manufacturing the same

1 is a flow chart illustrating a paper packaging material manufacturing method according to a preferred embodiment of the present invention.

2A and 2B are perspective views each showing a paper packaging material manufactured according to the manufacturing method of FIG. 1.

3 is a sectional view of the cross-section of FIG. 2A;

Figure 4 is a perspective view of a paper packaging material according to another embodiment of the present invention.

FIG. 5 is a sectional view of the section of FIG. 4; FIG.

<Explanation of symbols for the main parts of the drawings>

10, 20, 30: base 11, 21, 31: coating layer

12: adhesive layer 100, 200: paper packaging material

110, 210: Hall

The present invention relates to a paper packaging material and a method of manufacturing the same.

In general, corrugated cardboard is used as an overall packaging material such as unit packaging, internal packaging, external packaging, freight transport itself. In particular, corrugated paper is inexpensive, has good uniformity, high strength per unit weight, excellent adhesion and printability, good adaptability to high and low temperatures, hygienic due to no smell and toxicity, and automatic packaging aptitude. It is widely used as a packaging material because it has the advantages of good shape retention, excellent environmental adaptability, and excellent recycling of waste.

Corrugated packaging uses a large portion of the sector requiring high strength and water resistance.

However, when the cardboard packaging material is used, the strength and the water resistance are insufficient, so the product is wrapped in plastic and packed in a box. The use of submaterials such as vinyl is also a problem as a source of new environmental pollution.

In addition, as a method of strengthening the water resistance, there is a method of significantly increasing the amount of paraffin wax used or immersed in coal tal, but these materials are not recycled and are mainly embedded in landfills, thus becoming a major culprit of environmental pollution.

The present invention has been made to solve the above-mentioned problems, the thickness is very high, the strength is very good, the specific gravity is also very high, can easily support the weight of heavy products, and when the product packaging for transportation and storage to the external impact The purpose of the present invention is to provide a paper packaging material and a method of manufacturing the same, which can prevent the product from being damaged and have excellent water resistance.

Paper packaging material of the present invention for achieving the above object, 9.3% by weight of sodium oxide (Na ₂ O), 29.2% by weight of silicon dioxide (SiO ₂ ), 61.48% by weight of water (H ₂ O), water insoluble An adhesive layer is formed by applying an adhesive composed of 0.01 wt% and ferric trioxide (Fe ₂ O ₃ ) 0.01 wt%.

In addition, the paper packaging material of the present invention for achieving the above object is a copolymer of 45 to 55% by weight of methyl methacrylate (methyl methacrylate) and 45 to 55% by weight of butyl acrylate (Butyl Acrylate) And a coating agent mixed with an emulsifier to form a coating layer.

Furthermore, the manufacturing method of the paper packaging material of the present invention for achieving the above object, (a) preparing a base paper; (b) processing the base paper into a desired shape; (c) a coating layer coated with a copolymer mixed with water and an emulsifier is a copolymer consisting of 45 to 55% by weight of methyl methacrylate and 45 to 55% by weight of butyl acrylate (Butyl Acrylate) on the surface of the base paper Forming a; (d) 9.3% by weight of sodium oxide (Na ₂ O), 29.2% by weight of silicon dioxide (SiO ₂ ), 61.48% by weight of water (H ₂ O), 0.01% by weight of water insoluble content, trioxide on the surface where the coating layer of the base paper was formed Forming an adhesive layer by applying an adhesive composed of 0.01 wt% of ferric iron (Fe ₂ O ₃ ); And (e) adhering the surface on which the adhesive layer of the base paper is formed to another base paper to prepare a packaging material.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart illustrating a paper packaging material manufacturing method according to a preferred embodiment of the present invention.

As shown in Figure 1, the paper packaging material manufacturing method of the present embodiment consists of the following steps.

First, prepare the paper. (Step a) The raw paper may be made of pure plant fibers such as paper, corrugated cardboard, and honeycomb board.

Next, the base paper is processed into a desired shape. (Step b) In this step, processing such as cutting paper, punching holes, and the like may be performed, and various processing methods may be used according to a desired shape.

Next, a coating agent is applied to the surface of the base paper to form a coating layer. (C step) The coating agent is a copolymer of 45 to 55% by weight of methyl methacrylate (Methyl Methacrylate) and 45 to 55% by weight of butyl acrylate (Butyl Acrylate) is mixed with water and an emulsifier.

Methyl methacrylate (MMA) is also called α-methyl acrylate, and the chemical formula is C ₅ H ₈ O ₂ . Melting point is -48.2 ℃, boiling point is 101 ℃, specific gravity is 0.9440 (20 ℃). It is a colorless transparent liquid with ester odor. It is slightly soluble in water but soluble in most organic solvents.

In the above, the viscosity of the coating agent does not need to be particularly limited. The adjustment of this viscosity is in the range 0.001 to 1.2 Pa.s, preferably 0.001 to 0.6 Pa.s, but is not limited thereto, and allows bubbles to be stably dispersed in the coating. If the viscosity of the coating agent exceeds 1.2 Pa.s it will be difficult to uniformly disperse, it will be difficult to apply due to the excessive viscosity to have an appropriate viscosity.

In addition, the concentration of the coating agent is preferably at least 50% by weight, more preferably at least 70% by weight. If the concentration of the coating is less than 40% by weight, longer drying time is required at a higher temperature, which impairs the manufacturing efficiency. Therefore, the concentration of the coating is more than 70% by weight, which reduces the water content and makes the drying process more efficient. Most preferred in that it can be omitted.

Next, an adhesive is applied to the surface on which the coating layer of the base paper is formed to form an adhesive layer. (Step d) the adhesive is 9.3% by weight of sodium oxide (Na ₂ O), 29.2% by weight of silicon dioxide (SiO ₂ ), 61.48% by weight of water (H ₂ O), 0.01% by weight of water insoluble, ferric trioxide (Fe ₂ O ₃ ) 0.01 wt%.

As an example of water insolubles, in this embodiment, the water insolubles contain magnesium oxide and / or magnesium silicate.

Finally, the surface on which the adhesive layer of the base paper is formed is bonded to another base paper to prepare a packaging material. (E) The other base paper may be formed with a coating layer coated with the above coating agent.

Paper packaging material prepared by the above process is shown in Figures 2a to 3. 3 is a cross-sectional view of the paper packaging material shown in Figure 2a, it is shown that the two sheets of paper are bonded to each other for convenience, reference numeral 10, 20 shown in Figure 3 is a base paper, 11, 21 is a coating layer, 12 is an adhesive layer Represent each.

The paper packaging materials 100 and 200 illustrated in FIGS. 2A to 3 illustrate inner packaging materials used for fixing the products and preventing them from being damaged due to collision between the products. Depending on the shape of the holes (110, 210) formed in the inner packaging material may vary.

In addition, since the inner packaging material requires a certain thickness, the adhesive is applied to the base paper to which the coating agent is applied to bond the surfaces to which the adhesive is applied, and the thickness is appropriately adjusted by varying the number of base papers according to the required thickness. Could be.

Furthermore, it is a matter of course that the adhesive can be prepared by applying only an adhesive to a base paper not coated with a coating agent.

Meanwhile, as another embodiment, a paper box for packaging a product or storing an article is illustrated in FIG. 4, and FIG. 5 is a cross-sectional view of FIG. 4. Reference numeral 30 in FIG. 5 denotes a base paper and 31 denotes a coating layer.

In order to confirm the effect of the paper packaging material according to the present invention having the above configuration, the strength and water resistance test was commissioned by the Korea Institute of Construction Materials and the results are as follows.

First, 9.3% by weight of sodium oxide (Na ₂ O), 29.2% by weight of silicon dioxide (SiO ₂ ), 61.48% by weight of water (H ₂ O), 0.01% by weight of water insoluble, and ferric trioxide (Fe ₂ O ₃₎ ) Shows the results for the embodiment when the adhesive consisting of 0.01% by weight.

Table 1. Strength and Water Resistance Tests

Test Items result Volume specific gravity (20 ℃) 1.416 Length change rate by absorption (%) 0.003 Moisture content (%) 0.02 Surface Absorption (g) 0.008 Total Absorption Rate (%) 0.4 Bending failure load (N) When drying 459 When wet 446 Impact resistance drop height 65㎝ clear

These test results show that the paper packaging material according to the present invention has high strength and high water resistance, which is a property of preventing moisture.

The paper packaging material of the present invention can be utilized in various papers, wrapping papers, boxes, labels, wallpaper, medical supplies, household containers, etc. In particular, the strength and excellent water resistance, so as a substitute for plywood or steel board (steel board) It can be utilized easily.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art various modifications of the present invention without departing from the spirit and scope of the invention described in the claims below. Or it may be modified.

According to the paper packaging material and the manufacturing method of the present invention as described above, there are the following effects.

The coating layer coated on the base paper is very thin and very strong, and its specific gravity is also very high, so it can easily support the weight of heavy products, and the product is damaged by external impact when packing the product for transportation and storage. You can prevent it.

In addition, it forms a film on the entire surface of the base paper to prevent the penetration of moisture or oil, etc., and the water and other substances do not penetrate the base paper even after time, so it is very excellent in water resistance, oil resistance, antifouling property, and waterproof.

In addition, simply by applying a coating on the base paper, the manufacturing process is easy and fast manufacturing costs can be reduced, production efficiency can be improved.

Furthermore, the base paper on which the coating layer is formed can be recycled, decomposed naturally, and environmentally friendly such as dioxins are not detected during incineration, which is environmentally friendly and harmless to the human body.

On the other hand, the adhesive portion bonded by the adhesive is very improved enough to withstand the increased pressure, so the box can be easily manufactured with the adhesive alone without using other materials.

Claims (3)

9.3% by weight of sodium oxide (Na ₂ O), 29.2% by weight of silicon dioxide (SiO ₂ ), 61.48% by weight of water (H ₂ O), 0.01% by weight of water insoluble, 0.01% by weight of ferric trioxide (Fe ₂ O ₃ ) Paper packaging material which formed the adhesive layer by apply | coating the adhesive which consists of%. A paper packaging material in which a copolymer composed of 45 to 55% by weight of methyl methacrylate and 45 to 55% by weight of butyl acrylate is coated with a coating agent mixed with water and an emulsifier to form a coating layer. (a) preparing a sheet of paper; (b) processing the base paper into a desired shape; (c) a coating layer coated with a copolymer mixed with water and an emulsifier is a copolymer consisting of 45 to 55% by weight of methyl methacrylate and 45 to 55% by weight of butyl acrylate (Butyl Acrylate) on the surface of the base paper Forming a; (d) 9.3% by weight of sodium oxide (Na ₂ O), 29.2% by weight of silicon dioxide (SiO ₂ ), 61.48% by weight of water (H ₂ O), 0.01% by weight of water insoluble content, trioxide on the surface where the coating layer of the base paper was formed Forming an adhesive layer by applying an adhesive composed of 0.01 wt% of ferric iron (Fe ₂ O ₃ ); And (e) adhering the surface on which the adhesive layer of the base paper is formed to another base paper to manufacture a packaging material.

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