KR100825520B1 - Multi-layered packaging sheet comprising a wax layer and packaging bags manufactured therefrom - Google Patents

Abstract

The present invention relates to a multi-layered packaging and a packaging bag made of a synthetic resin melt-extrusion coating layer further formed on a wax layer formed on a surface material layer selected from paper, nonwoven fabric and synthetic resin film, and excellent in openability and tear resistance and moisture-proof. This has an improved effect.

      Synthetic resin, wrapping paper, wax layer, packaging bag

Description

Multi-layered packaging sheet comprising a wax layer and packaging bags manufactured therefrom}

FIG. 1A is a view schematically illustrating a cross-sectional structure of a conventional wrapping paper having a synthetic resin coating layer formed on one surface thereof, together with a manufacturing process thereof.

FIG. 1B is a view briefly showing a cross-sectional structure of another conventional multilayer structure wrapping paper in which a synthetic resin coating layer and a synthetic resin film layer are sequentially formed on one surface of a surface paper together with a manufacturing process thereof.

Figure 2 is a view showing a cross-sectional structure of an embodiment of a multi-layer wrapper according to the present invention.

3 is a view showing a cross-sectional structure of another embodiment of a multi-layer wrapper according to the present invention.

Figure 4 is a view schematically showing the step of forming a wax layer during the process of manufacturing a multi-layer wrapping paper according to the present invention and the cross-sectional structure of the manufactured wrapping paper.

FIG. 5 is a diagram illustrating an example of a manufacturing process of the multilayer structure wrapper shown in FIG. 3.

6 is a photograph showing an example of a soap packaging bag.

Explanation of symbols on the main parts of the drawings

11: surface paper 12: surface paper frame

21 molten synthetic resin 22 molten synthetic resin extrusion die

31: inner paper 32: inner paper roll

41: melted wax 42: wax bath

51: cooling roller 52: pressure roller

53: Wax Coated Roller

60 ', 70': conventional multi-layer wrapping paper

80: wrapping paper coated with a wax layer

100: multi-layer wrapping paper of the present invention

61, 71, 81, 101: surface material layer

62, 72, 102, 102 ': synthetic resin coating layer

73: hip resin film layer

84, 104: wax layer

The present invention relates to a packaging having a multi-layer structure, and more particularly to a multi-layer packaging and a packaging bag made of a synthetic resin melt extrusion coating layer further formed on the wax layer formed on the surface material layer.

Various materials such as paper, synthetic resin films, and nonwoven fabrics, and sheet-like materials having various structures, such as single-layer sheets, synthetic resin laminated sheets, and multilayer sheets such as synthetic resins and paper or nonwoven fabrics, are used as wrapping papers.

For example, a refillable liquid detergent pouch is made of a liquid impermeable laminated synthetic resin sheet, and a confectionery bag filled with nitrogen gas is made of a gas impermeable sheet coated with silver foil on a synthetic resin film.

Soaps are typically double-packed in envelope-shaped packaging alone or in additional boxed packaging that wraps them around and prevents soap from contaminating the skin during distribution. To prevent cracking and the like, and to take the fragrance from the outside without taking out the soap directly, a certain amount of perfume gas molecule permeability is required to allow the consumer to select, but moisture-proofing is required to prevent permeation of moisture molecules. In addition, when the user opens or seals the heat-sealed portion in order to remove the soap, the opening property and tear property should be good.

Packaging materials of various structures have been developed and used to satisfy the required characteristics of the soap packaging paper as described above.

Fig. 1A schematically shows the cross-sectional structure of a conventional double-layered soap inner wrapper 60 'having a synthetic resin extrusion coating layer 62 formed on a surface material layer 61, such as paper or nonwoven fabric, and a manufacturing process thereof. It was. The dual structure wrapping paper 60 ′ of FIG. 1 is a pressure roller 52 that combines the surface paper 11 continuously supplied from the surface paper roll 12 and the molten synthetic resin 21 extruded through the extrusion die 22. And manufactured between and cooling roller 51. Such a double-structured wrapping paper has a problem in that the openability of the heat-sealed portion of the inner packaging bag and the tearability of the material are good but the moisture resistance is low.

As shown in FIG. 1B, which is designed to compensate for the above problems of the double-structured wrapping paper, the synthetic resin melt extrusion coating layer 72 is formed on the surface material layer 71 such as paper, nonwoven fabric, and the like, such as an LLDPE film. The soap inner packaging paper 70 'which has the triple laminated structure which further formed the synthetic resin film layer 73 may be used. The inner lapping paper 70 ′ having the triple lamination structure of FIG. 1B includes a surface paper 11 continuously supplied from the surface paper roll 12 and an inner paper 31 continuously supplied from the inner paper roll 32. The molten synthetic resin 21, which is extruded through the extrusion die 22, is positioned between the pressure rollers 52 and the cooling rollers 51 to be manufactured together. The packaging paper for an internal soap bag having such a triple lamination structure has excellent moisture resistance, but is difficult to open and has a poor tearing property.

Disclosure of the Invention An object of the present invention is to solve the problems of the conventional soap wrapping paper as described above, to provide a multi-layer structure wrapping paper excellent in the openability and tear resistance, and moisture resistance.

Another object of the present invention is to provide a soap packaging bag made of a multi-layer wrapper having excellent openability and tearability.

According to the first object of the present invention, a multi-layered wrapping paper having excellent openability and tearability has a structure in which a synthetic resin melt extrusion coating layer is further formed on a wax layer formed on a surface material layer selected from paper, nonwoven fabric and resin film.

In the multilayer structure wrapper of the present invention, the synthetic resin melt extrusion coating layer, preferably, may be made of one or more synthetic resins selected from the group consisting of PE (ployethylene), PP (polypropylene) and EVA (ethylene vinyl acetate copolymer). have.

In the multi-layer packaging of the present invention, the wax layer is wax alone or PE, PP, EVA or one or more synthetic resin and wax mixtures selected from the group consisting of PE, PP and EVA, preferably 100 parts by weight of wax. Mixtures thereof may be mixture layers of 10 to 150 parts by weight.

The multilayer structure wrapper of the present invention may further comprise a synthetic resin melt coating layer between the surface material layer and the wax layer.

According to the second object of the present invention, the soap inner packaging bag having excellent openability and tearability is a bag of a shape generally used for soap inner packaging, which is made of the above multilayered structure packaging.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. However, the embodiments illustrated in the accompanying drawings are provided only to assist in understanding the present invention, and are not intended to limit the technical scope of the present invention thereto in any sense, and the protection scope of the present invention. Is only limited by the appended claims.

Figure 2 shows a cross-sectional structure in one embodiment of a multi-layer wrapping paper according to the present invention. The multilayer structure wrapper 100 of FIG. 2 is a structure in which a wax layer 104 is interposed between the surface material layer 101 and the melt-extruded synthetic resin coating layer 102.

The surface material layer 101 may be appropriately selected from paper, a synthetic resin film, a nonwoven fabric, and the like. As a result of various experiments, the paper or nonwoven fabric has a basis weight of about 20-150 g / m 2, and in the case of a synthetic resin film, about 12-40 μm. It has been found to have a thickness of.

As the synthetic resin melt extrusion coating layer 102, any synthetic resin can be used, and it has been found that it is suitable to have a thickness of about 10-30 μm by experimenting by melt extrusion of PE (ployethylene) and coating the surface material. .

The wax layer 104 may be, for example, petroleum-based paraffin wax or beeswax wax alone, or may be used by mixing a wax layer with PE, PP, EVA or a mixture thereof, for example. As a result, it is preferable to melt the mixture mixed at a ratio of 10 to 150 parts by weight of PE, PP, EVA or a mixture thereof with respect to 100 parts by weight of the wax, and to form the coating on the surface material layer 101 at a rate of 5-25 g / m 2. It turned out.

Figure 3 shows a cross-sectional structure of another embodiment of a multi-layer wrapper according to the present invention. In the multi-layer wrapper 100 of FIG. 3, one more synthetic resin melt extrusion coating layer 102 ′ is formed between the surface material layer 101 and the wax layer 104. The synthetic resin melt and extrusion coating layer 102 ′ may be the same as the synthetic resin melt extrusion coating layer 102 of the embodiment of FIG. 2, with the remaining layers 101, 102, 104 as described with reference to FIG. 2.

Figure 4 is a process chart for explaining the wax coating layer forming step required to manufacture a multi-layer wrapping paper containing a wax layer of the present invention. The wax layer coating operation is performed by applying a melted wax while rotating a coating roller 53 having a lower part immersed in a wax bath 42 containing an application wax (80 to 100 ° C) or a wax and a synthetic resin melt (100 to 150 ° C). The 41 is coated on the bottom surface of the surface paper 11 continuously supplied from the surface paper roll 12 and then cooled by using a cooling roll or through a cooling chamber to form a wax coating layer 84.

FIG. 5 is a process diagram illustrating a process of manufacturing the four-layer wrapping paper shown in FIG. 3, which is a combination of the unit processes shown in FIGS. 1 and 4, and replaces the description of this process diagram as described in each corresponding process.

Figure 6 is an example of a packaging bag according to the second object of the present invention, a photograph showing a soap inner packaging bag having a typical shape. The soap is packaged by putting soap through the left opening of the bag shown in Fig. 6 and sealing the opening by fusion bonding or other known method.

Test Example 1.

Adhesion strength (1.028 kg / mm) and water vapor permeability obtained from the production of the multilayered packaging paper of the present invention consisting of a nonwoven fabric surface layer of 20 μm, a paraffin wax layer of 25 μm, and a PE melt extrusion coating layer of 30 μm. 3.13 g / m 2/24 hours) is shown in Table 1.

Test Example 2.

Adhesion strength obtained by testing the multilayered structured packaging of the present invention comprising a surface material layer of 20 μm of nonwoven fabric, 20 μm of PE melt extrusion coating layer, 25 μm of wax layer of paraffin wax, and 30 μm of melt extrusion coating layer (1.415 kg). / Mm) and water vapor transmission rate (0.28 / ㎡ / 24 hours) are shown in Table 1.

Comparative Example 1.

Table 1 shows the adhesive strength (1.365 kg / mm) and moisture permeability (18.00 g / m2 / 24 hours) obtained by manufacturing a wrapping paper of 20 μm of nonwoven fabric and 30 μm of PE melt extrusion coating layer. .

Comparative Example 2.

Adhesion strength (2.588㎏ / ㎜) and water vapor permeability (13.2g / ㎡ / 24 hours) as a result of manufacturing and packaging a package made of nonwoven fabric surface layer 20㎛, PE melt extrusion coating layer 20㎛, CPP synthetic resin film 30㎛ Is shown in Table 1.

                                     Table 1

            division        Adhesive strength (㎏ / ㎜)      Moisture permeability (g / ㎡ / 24 hours)           Comparative Example 1            1.365            18.00           Test Example 1            1.028             3.13           Comparative Example 2            2.588            13.20           Test Example 2            1.415             0.28

As shown in Table 1, the multi-layer packaging of the present invention has a lower adhesive strength (1.365: 1.028, 2.588: 1.415) than the wrapping paper to be compared with the wax layer, and the moisture permeability is also lowered (18.00: 3.13, 13.2: 0.28). Adhesive strength suitable for use as having, but has the characteristics of excellent openability and tear resistance and high moisture resistance.

The synthetic resin melt extrusion coating layer is further formed on the wax layer formed on the surface material layer selected from paper, nonwoven fabric and resin film, which solves the problems of conventional soap inner packaging according to the present invention. There is an effect of providing a lower multilayer packaging and a soap packaging bag made therefrom.

Claims (10)

A multi-layer wrapping paper comprising a surface material layer selected from paper, a nonwoven fabric and a synthetic film, a wax layer formed on the surface material layer, and a synthetic resin melt extrusion coating layer formed on the wax layer. The multi-layer wrapper of claim 1, wherein the synthetic resin melt extrusion coating layer is formed of at least one synthetic resin selected from the group consisting of PE, PP, and EVA. 3. The multi-layer wrapping of claim 1 or 2, wherein the wax layer is made of wax alone or a mixture of one or more synthetic resins and waxes selected from the group consisting of PE, PP and EVA. The multi-layer wrapping paper of claim 3, wherein the wax mixture is a mixture of 10 to 150 parts by weight of at least one synthetic resin selected from the group consisting of PE, PP, and EVA with respect to 100 parts by weight of wax. 3. The multi-layer wrapping of Claim 1 or 2, further comprising a synthetic resin melt coating layer between the surface material layer and the wax layer. A packaging bag made of the multilayer packaging according to claim 1. delete 5. The multi-layer wrapping of Claim 4, further comprising a synthetic resin melt coating layer between the surface material layer and the wax layer. A packaging bag made of the multilayer packaging according to claim 4. A packaging bag made of the multilayer packaging according to claim 5.

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