KR102518647B1 - Manufacturing method for water proof box - Google Patents

Abstract

The present invention relates to a manufacturing method of a waterproof box. The present invention comprises: a step of preparing corrugated cardboard; a step of coating a moisture-absorbing material containing water-expandable fiber on the corrugated cardboard; a step of coating a first waterproof material on an upper portion of the corrugated cardboard; a step of manufacturing a waterproof box by coating a second waterproof material on a lower portion of the corrugated cardboard; a step of cutting a portion of a box member to fold the box member; and a step of manufacturing the waterproof box by folding the box member. The manufacturing method of the waterproof box enables the waterproof box waterproofing a surface thereof to protect the inside of the box from water despite rain or water-spraying to be manufactured.

Description

Manufacturing method of waterproof box {MANUFACTURING METHOD FOR WATER PROOF BOX}

The present application relates to a method for manufacturing a waterproof box.

Corrugated cardboard is manufactured by attaching a corrugated core between the surface paper and the back paper. Since these corrugated cardboards are lightweight and have cushioning properties, they are used as packaging boxes for various products.

However, since corrugated cardboard is weak against moisture, packing foods containing moisture in a corrugated cardboard box, or storing the box in a place exposed to rain or high humidity can easily damage the box and damage the material inside the box. For this reason, there may be restrictions on the use of boxes using corrugated cardboard or the like.

In addition, in the case of a box made of polystyrene (styrofoam), waterproof performance is excellent, but a problem of crumbling during transportation may occur.

Korean Registered Patent Publication No. 10-1593131, which is a background technology of the present application, relates to a waterproof corrugated cardboard box. The box has a waterproof coating layer formed on the surface of the corrugated cardboard, and a waterproof composition is formed on the inside, but it is not recognized that the corrugated cardboard box is damaged by moisture that may occur inside the box.

The present application is to solve the problems of the prior art described above, and an object of the present invention is to provide a method for manufacturing a waterproof box, and a waterproof box manufactured by the method.

However, the technical problem to be achieved by the embodiments of the present application is not limited to the technical problems described above, and other technical problems may exist.

As a technical means for achieving the above technical problem, the first aspect of the present application is to prepare corrugated cardboard; coating a moisture-absorbing material containing water-expandable fibers on the corrugated cardboard; coating a first waterproof material on top of the corrugated cardboard; manufacturing a waterproof box member by coating a second waterproof material on a lower portion of the corrugated cardboard; cutting a portion of the box member so that the box member can be folded; and manufacturing a waterproof box by folding the box member so that the surface coated with the first waterproof material faces outside and the surface coated with the second waterproof material faces inside. It is about a method for manufacturing a waterproof box, including a.

According to one embodiment of the present application, moisture introduced from the outside of the waterproof box may be waterproofed by the first waterproof material, but is not limited thereto.

According to one embodiment of the present application, moisture generated by a difference in temperature and humidity between the outside of the waterproof box and the inside of the waterproof box may be absorbed by the moisture absorbing material, but is not limited thereto.

According to one embodiment of the present application, in the cut and folded portion of the waterproof box, moisture condensed on the surface of the second waterproof material may be absorbed into the moisture absorbing material, but is not limited thereto.

According to one embodiment of the present application, the water-expandable fiber may include a super absorbent polymer and a loofah fiber, but is not limited thereto.

According to one embodiment of the present application, the coating thickness of the first waterproof material and the second waterproof material may be each independently 10 μm to 0.1 mm, but is not limited thereto.

According to one embodiment of the present application, the first waterproof material and the second waterproof material may be patterned to have hydrophobicity, but are not limited thereto.

According to one embodiment of the present application, the first waterproof material and the second waterproof material are each independently Al, Cu, Mg, Au, Ag, polyvinyl acetate, polyacryl amide, candel It may include one selected from the group consisting of candelilla wax, carboxymethyl cellulose, and combinations thereof, but is not limited thereto.

Further, a second aspect of the present application relates to a waterproof box manufactured by the method according to the first aspect.

The above-described problem solving means are merely exemplary and should not be construed as intended to limit the present disclosure. In addition to the exemplary embodiments described above, additional embodiments may exist in the drawings and detailed description of the invention.

According to the above-described problem solving means of the present application, the method for manufacturing a waterproof box can manufacture a waterproof box that can protect the inside of the box from water even if the surface is waterproofed and rain or water is sprayed.

In addition, in the case of a general waterproof box, dew condensation may occur inside the box due to a difference in temperature and humidity between the outside and the inside during use, but the waterproof box manufactured by the method according to the present application includes a moisture absorbing material to absorb moisture generated inside the box. However, the shape of the box may not be collapsed by the second waterproof material formed inside the box.

In addition, the method of manufacturing a waterproof box according to the present application is to manufacture a waterproof box by folding it as necessary after storing the waterproof box member in an unfolded state at normal times, and when it is not raining, the waterproof box can be stored in an unfolded state to save space It can be used efficiently, and the moisture absorbed by the moisture absorbing material can be discharged.

However, the effects obtainable herein are not limited to the effects described above, and other effects may exist.

1 is a flowchart showing a method of manufacturing a waterproof box according to an embodiment of the present application.
2 is a schematic diagram of a waterproof box according to one embodiment of the present application.
3 is a development view of a waterproof box according to one embodiment of the present application.

Hereinafter, embodiments of the present application will be described in detail so that those skilled in the art can easily practice with reference to the accompanying drawings.

However, the present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. And in order to clearly describe the present application in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout this specification, when a part is said to be "connected" to another part, this includes not only the case of being "directly connected" but also the case of being "electrically connected" with another element in between. do.

Throughout the present specification, when a member is referred to as being “on,” “above,” “on top of,” “below,” “below,” or “below” another member, this means that a member is located in relation to another member. This includes not only the case of contact but also the case of another member between the two members.

Throughout the present specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.

As used herein, the terms "about," "substantially," and the like are used at or approximating that number when manufacturing and material tolerances inherent in the stated meaning are given, and are intended to assist in the understanding of this disclosure. Accurate or absolute figures are used to prevent undue exploitation by unscrupulous infringers of the stated disclosure. In addition, throughout the present specification, “steps of” or “steps of” do not mean “steps for”.

Throughout the present specification, the term "combination thereof" included in the expression of the Markush form means one or more mixtures or combinations selected from the group consisting of the components described in the expression of the Markush form, and the components It means including one or more selected from the group consisting of.

Throughout this specification, reference to "A and/or B" means "A or B, or A and B".

Hereinafter, the manufacturing method of the waterproof box of the present application will be described in detail with reference to embodiments and examples and drawings. However, the present application is not limited to these embodiments and examples and drawings.

As a technical means for achieving the above technical problem, the first aspect of the present application is to prepare corrugated cardboard; coating a moisture-absorbing material containing water-expandable fibers on the corrugated cardboard; coating a first waterproof material on the upper surface of the corrugated board; manufacturing a waterproof box member by coating a second waterproof material on the lower surface of the corrugated cardboard; cutting a portion of the box member so that the box member can be folded; and manufacturing a waterproof box by folding the box member so that the surface coated with the first waterproof material faces outside and the surface coated with the second waterproof material faces inside. It is about a method for manufacturing a waterproof box, including a.

In general, a waterproof box refers to a box that protects objects from moisture and moisture such as rain. In the present application, after manufacturing a waterproof box member by coating the upper and lower parts of the moisture absorbing material with a first waterproof material and a second waterproof material, a method of manufacturing a waterproof box using the material is provided.

1 is a flow chart showing a manufacturing method of a waterproof box according to an embodiment of the present application, FIG. 2 is a schematic diagram of a waterproof box according to an embodiment of the present application, and FIG. 3 is a development view of a waterproof box according to an embodiment of the present application. am. In this regard, the dotted line in Fig. 3 is a part of the box member that has been cut away, and means a portion that is folded for manufacturing a waterproof box.

First, corrugated cardboard was prepared, and a moisture absorbent material containing water-expandable fibers was coated on the corrugated cardboard (S100).

According to one embodiment of the present application, the inner space of the corrugated board may be filled with the moisture absorbing material, but is not limited thereto.

According to one embodiment of the present application, a surface selected from the group consisting of an upper surface, a lower surface, both sides, a front surface, a rear surface, and combinations thereof of the corrugated cardboard may be coated with the moisture absorbing material and/or the waterproof material. It is not limited.

Corrugated cardboard is a material for a general box, and refers to a material in which corrugated paper is attached between two sheets of cardboard. Depending on the thickness of the corrugated cardboard, it may have various structures and performances such as E-gool, B-gool, and A-gool. At this time, since the strength of the corrugated cardboard may decrease when moisture penetrates between the corrugated cardboard, the upper, lower, side, front, and rear surfaces of the corrugated cardboard are used as a moisture-absorbing material and/or a waterproof material. It may be coated and filled so that a moisture absorbing material and/or a waterproof material is placed inside the corrugated cardboard.

According to one embodiment of the present application, the waterproof box member may use polystyrene instead of corrugated cardboard, but is not limited thereto.

The polystyrene is generally called styrofoam, and unlike corrugated cardboard, it may be crushed by force during use, but has excellent waterproof characteristics.

In general, the waterproof performance can be improved by using a box made of polystyrene, but when using polystyrene, it is easily broken compared to corrugated cardboard, and problems such as polystyrene fragments scattering around during use and annoying sound when transported by hand may occur. However, the above problems can be solved when the polystyrene-based waterproof box is manufactured through the method according to the present invention.

According to one embodiment of the present application, the thickness of the corrugated board may be 1 mm to 5 mm, but is not limited thereto.

The water-expandable fiber can absorb moisture penetrating into the box when the first waterproof material is damaged and condensation generated inside the waterproof box.

According to one embodiment of the present application, the water-expandable fiber may include a super absorbent polymer and a loofah fiber, but is not limited thereto.

According to one embodiment of the present application, the superabsorbent polymer may be prepared by acrylic acid, acrylamide, and N,N-methylenebisacrylamide, but is not limited thereto.

The superabsorbent polymer is a material that absorbs moisture up to 170 to 200 times its mass and can be used in diapers and the like.

Specifically, in order to prepare a superabsorbent polymer, dichloroethane and methylcyclohexane are mixed and ethylcellulose 1 as a dispersion stabilizer is added to 600 g of an organic solvent whose specific gravity is adjusted to 1.0-1.1. g and 2.5 g of maleized polybutadiene (Mw 2500) were added, the air was substituted with nitrogen, and the mixture was stirred at 60° C. for 2 hours or more to completely dissolve the dispersion stabilizer. Subsequently, 50 g of acrylic acid and 100 g of distilled water were added to another beaker, the temperature was maintained below 20 ° C, and neutralized using 40.8 g of 50% NaOH until the degree of neutralization reached 75%, followed by acrylamide ( acrylamide) and 0.7 g of N,N-methylenebisacrylamide as a crosslinking agent having a degree of crosslinking of 0.2% were added and completely dissolved. Then, a hydroxyethylcellulose centering agent was injected and stirred for 6 to 8 hours until completely dispersed to prepare a centered monomer. Subsequently, 1.0 g of potassium persulfate as an initiator was completely dissolved in 5 g of distilled water, mixed well, and slowly added to the thickened monomer phase in the reactor. The stirring speed was fixed at 125 rpm and the reactor temperature was 65 The polymerization reaction proceeded for 4 hours while maintaining at °C. Subsequently, the temperature of the reaction solution is raised to 70 ° C., and the aging reaction is performed for 2 hours. When a bead-type resin containing about 65% of water is accumulated at the bottom of the reactor, the reactor is cooled to 30 ° C. or less and filtered. After removing the solvent, the process of adding methanol to remove moisture was repeated twice. Finally, the filtered resins were washed with ethanol and then dried at 110° C. for 4 hours using a hot air dryer to obtain a spherical superabsorbent polymer.

According to one embodiment of the present application, the particle size of the superabsorbent polymer may be 10 μm to 1 mm, but is not limited thereto. Preferably, the particle size of the superabsorbent polymer may be 10 μm to 100 μm, but is not limited thereto.

The loofah fiber according to the present application is a material that can expand when it absorbs moisture, and refers to a fiber made from a loofah, which is a plant.

The moisture-absorbing material has a structure in which the water-expandable fibers are disposed on upper and lower portions of flat corrugated cardboard. For example, the moisture absorbing material may have a structure in which corrugated cardboard wound by the scrubber fibers and a superabsorbent polymer are dispersed and disposed on the scrubber fibers and/or the corrugated cardboard.

According to one embodiment of the present application, the loofah fibers and the superabsorbent polymer wound on the corrugated cardboard may absorb external moisture or moisture, but are not limited thereto.

The moisture-absorbing material is one in which water-expandable fibers and superabsorbent polymer are regularly or irregularly disposed on corrugated cardboard. The waterproof box according to the present application can be flattened and stored when not in use, and a plurality of pores formed by water-expandable fibers and superabsorbent resin may be included in a cross-sectional view of the waterproof box member including the moisture absorbing material. That is, even if the waterproof box member gets wet, the water absorbed by the water-expandable fiber and the superabsorbent polymer through the pores gradually evaporates during the storage process, so that the waterproof box member can be restored to its original state that is not wetted with water.

When water is sprayed on the moisture absorbing material or moist air is introduced into the vicinity of the moisture absorbing material, the moisture and moisture are absorbed by the moisture absorbing material before the corrugated cardboard is wet by moisture, thereby reducing the strength of the corrugated cardboard due to the moisture and moisture can be minimized.

According to one embodiment of the present application, moisture absorbed by the moisture absorbing material may be released into the air, but is not limited thereto.

As will be described later, when the corrugated cardboard on which the moisture absorbing material is formed is placed in a high temperature and/or dry environment, the absorbed moisture may evaporate to the outside through the surface of the corrugated cardboard. At this time, the water-expandable fiber can dry quickly if it contains a lot of moisture, as its surface area expands as much as its volume expands when it comes in contact with water.

According to one embodiment of the present application, the hygroscopic material may further include a water-curable polymer, but is not limited thereto.

According to one embodiment of the present application, the step of impregnating and drying the corrugated board in the hydraulic solution, and forming the moisture-absorbing material on the top and bottom of the corrugated board may include, but is not limited thereto.

The hydraulic curable polymer may include hydraulic curable polyurethane.

Water absorption of the corrugated board may be suppressed by the moisture absorbing material. However, since a small amount of moisture and moisture may be absorbed into the corrugated cardboard in the process of absorbing moisture and moisture by the moisture absorbing material, a problem in that the strength of the corrugated cardboard may be lowered. At this time, when the water-curable polymer is located on the surface of the corrugated cardboard, the strength of the box can be improved while suppressing water absorption of the corrugated cardboard while curing the water-curable polymer in a small amount of the moisture.

According to one embodiment of the present application, the loofah fibers wound on the corrugated cardboard may be wound at intervals of 0.1 mm to 1 mm, but are not limited thereto. When the interval between the scrubber fibers is less than 0.1 mm, the scrubber fibers expanded by water contact each other, and the water can be squeezed out by contact in the scrubber fibers of the waterproof box member in a sealed environment. On the other hand, when the distance between the fibers of the scrubber is greater than 1 mm, the corrugated cardboard may become wet due to water and moisture introduced from the side of the corrugated cardboard.

According to one embodiment of the present application, the thickness of the loofah fiber may be 0.1 mm to 1 mm, but is not limited thereto.

If the thickness of the loofah fiber exceeds 1 mm, the waterproof box member becomes thick, and when holding the box by hand, it may be inconvenient to use because of the texture of the loofah fiber, and if the thickness of the loofah fiber is less than 0.1 mm, the waterproof box member It takes a long time to manufacture due to the increased number of windings, and it may slip out of the hand because there is no friction when holding it with the hand.

Subsequently, a first waterproof material is coated on top of the corrugated cardboard (S200).

Subsequently, a waterproof box member was manufactured by coating a second waterproof material on the lower portion of the corrugated cardboard (S300).

In this regard, since the moisture absorption material is located on the surface of the corrugated cardboard, the first waterproof material and the second waterproof material coat the upper and lower surfaces of the moisture absorption material, and the upper and lower portions of the corrugated cardboard The upper and lower surfaces of the moisture absorbing material may be used instead of the expression of .

The shape of the waterproof box member can be maintained by the first waterproof material and the second waterproof material, and even if the moisture or moisture-absorbing loofah fibers and superabsorbent polymer partially expand, the box member is not folded or cut. It is expanded so that the shape of the waterproof box may not change.

According to one embodiment of the present application, the coating thickness of the first waterproof material and the second waterproof material may be each independently 10 μm to 1 mm, but is not limited thereto. Preferably, the coating thickness of the first waterproof material and the second waterproof material may be each independently 100 μm to 1 mm, but is not limited thereto. When the thickness of the waterproof box exceeds 1 mm, frictional force by the internal moisture absorbing material cannot be expected, resulting in an inconvenient transportation problem, and when the thickness of the waterproof box is less than 100 μm, the expansion of the moisture absorbing material causes There was a problem that the outer and inner coatings were damaged.

According to one embodiment of the present application, the first waterproof material and the second waterproof material may be patterned to have hydrophobicity, but are not limited thereto. The first waterproof material is in contact with the moisture absorption material, and the upper part of the first waterproof material is exposed to the outside of the waterproof box, that is, the surrounding environment, and the lower part may contact the moisture absorption material. By patterning the upper part of the first waterproof material with a hydrophobic structure, water falling on the surface of the waterproof box may not wet the waterproof box due to the hydrophobic structure. In addition, the second waterproof material may be hydrophobically coated so that water droplets condensed inside the waterproof box move to the moisture absorbing material.

According to one embodiment of the present application, the first waterproof material and the second waterproof material may include a metal coating film and a waterproof liquid.

According to one embodiment of the present application, the first waterproof material and the second waterproof material are each independently Al, Cu, Mg, Au, Ag, polyvinyl acetate, polyacryl amide, candel It may include one selected from the group consisting of candelilla wax, carboxymethyl cellulose, and combinations thereof, but is not limited thereto.

For example, after coating the upper and lower surfaces of the moisture absorbing material to a thickness of 0.3 mm using Al metal (metal coating film), a waterproofing solution may be applied. The coating liquid, on the polyvinyl acetate, based on 100 parts by weight of polyvinyl acetate, 2 to 5 parts by weight of polyacrylamide, 2 to 5 parts by weight of candelilla wax, and 2 parts by weight of carboxymethyl cellulose It may be prepared by mixing part to 5 parts by weight.

According to one embodiment of the present application, the application of the waterproof solution may be performed after manufacturing the waterproof box member or after manufacturing the waterproof box, but is not limited thereto. The waterproof solution applied after manufacturing the waterproof box may be applied only to the outer surface of the waterproof box.

According to one embodiment of the present application, the waterproofing solution may further include a rust-prevention function, but is not limited thereto. The first waterproof material and the second waterproof material may corrode when exposed to air as much as they contain Al metal.

The anti-corrosive function may be imparted by mixing 10 parts by weight to 40 parts by weight of calcium acetate and 10 parts by weight to 40 parts by weight of acetylated lanolin based on 100 parts by weight of the waterproofing solution on the waterproofing solution.

The waterproofing solution can prevent moisture from penetrating onto the metal coating film, and the metal coating film can prevent moisture passing through the waterproofing solution from penetrating into the inside of the box. In the absence of the waterproofing solution, the surface of the metal coating film may deteriorate waterproof performance due to dust. In addition, when the moisture absorbing material is coated with a waterproof liquid without the metal coating film, the moisture absorbing material expands while absorbing moisture, and the shape of the waterproof box may change.

In addition, when a waterproof box including an Al / corrugated cardboard / Al structure is manufactured using corrugated cardboard like a general box without the moisture absorbing material, condensation caused by a temperature difference between the inside and outside of the box caused by metal may cause the corrugated board to get wet. At this time, when the moisture absorbing material is used, moisture is discharged through the pores even in the process of absorbing and evaporating moisture, and during this process, changes in the shape and structure of the super absorbent polymer and the scrubber fibers may not occur.

Subsequently, a portion of the box member is cut so that the box member can be folded (S300).

The material of the waterproof box may have a rectangular shape having a predetermined thickness. However, in order to fold it into a box, it is necessary to modify the shape with the development of a rectangular parallelepiped, and the material of the waterproof box can be cut so that it can be folded to implement the upper, lower, left, right, front, and rear surfaces of the box.

In this regard, the sheath may be formed by cutting only the second waterproof material, or may be formed by cutting the absorbent material beyond the second waterproof material, but not cutting the first waterproof material.

For example, the thickness of the corrugated cardboard is 5 mm, the maximum thickness of the moisture absorbing material disposed on the upper and lower portions of the corrugated cardboard is 0.5 mm, and the average thickness of the first waterproof material and the second waterproof material is 0.3 mm, respectively. In this case, the waterproof box member may have a thickness of about 7.1 mm. At this time, the thickness of the sheath may be greater than 0.3 mm and less than 6.8 mm. Preferably, the thickness of the sheath may be greater than 0.8 mm and less than 5.8 mm.

That is, the thickness of the sheath is (the thickness of the waterproof box member) - (the sum of the thicknesses of the first waterproof material and the moisture absorption material located on the top of the corrugated cardboard) to (the thickness of the waterproof box member) - (the first waterproof material, the moisture absorption material) , and the sum of the thicknesses of corrugated cardboard). If the thickness of the sheath is less than the thickness of the first waterproof material, more force than necessary may be required in the process of folding the waterproof box member, and for convenience when folding, the thickness of the sheath is the first waterproof material and the upper absorbent material It needs to be greater than the sum of the thicknesses.

On the other hand, when the thickness of the sheath is formed to penetrate the corrugated cardboard, the sheath reaches the moisture absorbing material located at the bottom, causing a problem in that the strength of the waterproof box is lowered.

According to one embodiment of the present application, the waterproof box member may be folded around the sheathed portion, but is not limited thereto.

The sheathed portion may be a portion where the moisture absorbing material is exposed to the air, and through the corresponding portion, condensation generated inside the box can be absorbed into the moisture absorbing material, and when the waterproof box is unfolded and stored, the sheath also Moisture absorbed by the hygroscopic material may evaporate.

In the case of folding the waterproof box member without the sheath, more than necessary force is required when folding, and it may not be manufactured according to the shape of the box to be manufactured.

Subsequently, a waterproof box was manufactured by folding the box member so that the surface coated with the first waterproof material faces the outside and the surface coated with the second waterproof material faces the inside (S500).

According to one embodiment of the present application, moisture introduced from the outside of the waterproof box may be waterproofed by the first waterproof material, but is not limited thereto. At this time, moisture introduced from the outside may be blocked by the waterproofing solution. For example, in rainy or humid weather, moisture existing outside the waterproof box may be blocked by the first waterproof material and the waterproof liquid.

According to one embodiment of the present application, moisture generated by a difference in temperature and humidity between the outside of the waterproof box and the inside of the waterproof box may be absorbed by the moisture absorbing material, but is not limited thereto.

According to one embodiment of the present application, in the cut and folded portion of the waterproof box, moisture condensed on the surface of the second waterproof material may be absorbed into the moisture absorbing material, but is not limited thereto.

There may be a difference in temperature and humidity between the inside and outside of the waterproof box, so condensation may occur. Water droplets generated by the condensation may be formed inside the waterproof box, but the water droplets may be absorbed into the moisture absorbing material through the second waterproof material and the folded portion forming the inner surface of the waterproof box .

According to one embodiment of the present application, the internal cross-sectional view of the waterproof box may have a thick central portion and a thin edge, but is not limited thereto.

Unlike the first waterproof material, which minimizes contact between the waterproof box and water by being hydrophobically coated, water vapor in the air is condensed on the surface of the second waterproof material to form water droplets. That is, the water droplets generated on the inner surface of the waterproof box need to move to the moisture absorbing material through the folding part. , may have a triangular structure.

Further, a second aspect of the present application relates to a waterproof box manufactured by the method according to the first aspect.

With respect to the waterproof box according to the second aspect of the present application, detailed descriptions are omitted for portions overlapping with the first aspect of the present application, but even if the description is omitted, the contents described in the first aspect of the present application are in the second aspect of the present application. The same can be applied.

According to one embodiment of the present application, the waterproof box may include a handle, but is not limited thereto. At this time, the handle portion may be formed in an independent form from the waterproof box member or formed by cutting a part of the waterproof box member.

The handle part is a part to promote convenience in carrying the waterproof box, and means a part to which a finger or a clasp can be hung.

Specifically, the handle part of the waterproof box may include an empty space formed on the left and right surfaces of the waterproof box, and a protection unit that covers the empty space but is open only in a downward direction to prevent water from entering the empty space. However, it is not limited thereto.

In addition, the handle portion of the waterproof box may be formed naturally by a folding method of the waterproof box, but is not limited thereto.

In addition to this, the handle portion of the waterproof box may include any shape that allows the waterproof box to be hooked with a finger or a clasp.

Since the handle part is a space formed to communicate the inside and outside of the waterproof box, moisture can enter the inside of the box through the handle part. In this regard, since the cross-section of the waterproof box member according to the present application includes a moisture absorbing material and a second waterproof material at the center, even if water droplets are introduced into the inside, they are absorbed by the second waterproof material and the moisture absorbing material so that the objects inside the box are not exposed to water. contact can be prevented.

The waterproof box according to the present application may exist in the form of a waterproof box member when not in use, that is, in an unfolded state. In the case of the unfolded state, since the contact area with air is wider than that of the waterproof box, the moisture absorbed by the moisture absorbing material can be quickly evaporated.

The present invention will be described in more detail through the following examples, but the following examples are for illustrative purposes only and are not intended to limit the scope of the present application.

[Example 1]

First, by mixing dichloroethane and methylcyclohexane, 1 g of ethylcellulose as a dispersion stabilizer and maleized polybutadiene were added to 600 g of an organic solvent adjusted to have a specific gravity of 1.0-1.1. 2.5 g of polybutadiene, Mw 2500) was added, the air was substituted with nitrogen, and the mixture was stirred at 60° C. for 2 hours or more to completely dissolve the dispersion stabilizer. Subsequently, 50 g of acrylic acid and 100 g of distilled water were added to another beaker, the temperature was maintained below 20 ° C, and neutralized using 40.8 g of 50% NaOH until the degree of neutralization reached 75%, followed by acrylamide ( acrylamide) and 0.7 g of N,N-methylenebisacrylamide as a crosslinking agent having a degree of crosslinking of 0.2% were added and completely dissolved. Then, a hydroxyethylcellulose centering agent was injected and stirred for 6 to 8 hours until completely dispersed to prepare a centered monomer. Subsequently, 1.0 g of potassium persulfate as an initiator was completely dissolved in 5 g of distilled water, mixed well, and then slowly added to the thickened monomer phase in the reactor. The stirring speed was fixed at 125 rpm and the reactor temperature was 65 The polymerization reaction proceeded for 4 hours while maintaining at °C. Subsequently, the temperature of the reaction solution was raised to 70 ° C., and the aging reaction was carried out for 2 hours. When a bead-shaped resin containing about 65% of water is accumulated at the bottom of the reactor, the reactor is cooled to 30 ° C. or less and filtered. After removing the solvent, the process of adding methanol to remove moisture was repeated twice. Finally, the filtered resins were washed with ethanol and dried at 110° C. for 4 hours using a hot air dryer to obtain a 10 μm spherical superabsorbent polymer.

In this regard, the mass used in preparing the superabsorbent polymer may increase by a factor of a factor if necessary.

Then, based on 100 parts by weight of polyvinyl acetate, 2 to 5 parts by weight of polyacrylamide, 2 to 5 parts by weight of candelilla wax, and 2 to 5 parts by weight of carboxymethyl cellulose are mixed to prepare a waterproofing solution. did

Then, type A corrugated cardboard having a thickness of 5 mm was impregnated to be completely immersed in the waterproof solution for 10 minutes. Subsequently, the A-type corrugated cardboard was dried at room temperature for 3 hours, and dried in air using tongs to prevent either side of the A-type corrugated cardboard from drying.

Subsequently, 0.5 mm thick scrubber fibers were wound on one side of the dried A-type corrugated cardboard at intervals of 0.5 mm, and the superabsorbent polymer was irregularly dispersed. After sealing the surface on which the fiber was placed, the above process was repeated 6 times to expose the Al foil on all surfaces of the A-type corrugated cardboard. At this time, the Al film is patterned to have hydrophobicity.

At this time, in the dried type A corrugated cardboard, in the case of the side responsible for the inside of the box later, a 0.5 mm thick Al film is coated, but then the Al film is not coated on the later folded portion, and the center of the surface inside the box After etching to have a linear thickness gradient between the folded portions, the Al film may be patterned.

Subsequently, a sheath with a depth of 0.9 mm was created on the surface of the A-type corrugated cardboard, which is responsible for the inside of the box, so that it could be folded into a box shape. At this time, the sheath was formed on the portion where the Al film was not coated so as not to damage the Al film.

Then, after manufacturing a waterproof box by folding the corrugated cardboard around the sheath, the waterproof solution was applied to the outer surface.

[Example 2]

The same process as in Example 1 was performed, but polystyrene having a thickness of 5 mm was used instead of corrugated cardboard.

[Comparative Example 1-1]

The same process as in Example 1 was performed, but the process of preparing the superabsorbent polymer was omitted. That is, the waterproof box of Comparative Example 1-1 did not contain the superabsorbent polymer.

[Comparative Example 1-2]

The same process as in Example 1 was performed, but the process of preparing the waterproofing solution was omitted.

[Comparative Example 1-3]

A box was manufactured through the same process as in Example 1, but without the loofah fiber.

[Comparative Example 1-4]

A box was manufactured through the same process as in Example 1, but without the superabsorbent polymer and the scrubber fiber.

[Comparative Example 1-5]

The same process as in Example 1 was performed, but the Al film formation process was omitted.

[Comparative Example 1-6]

The same process as in Example 1 was performed, but the waterproofing solution formation and Al film formation processes were omitted.

[Comparative Example 2-1]

The same process as in Example 1 was performed, but the process of impregnating the A-type corrugated board in the waterproof solution was omitted.

[Comparative Example 2-2]

The same process as in Example 1 was performed, but A-type corrugated cardboard was placed on the floor and dried.

[Comparative Example 2-3]

The same process as in Example 1 was performed, but the process of applying the waterproofing solution to the outer surface after manufacturing the box was omitted.

[Comparative Example 3-1]

The same process as in Example 1 was performed, but a loofah fiber having a thickness of 1.2 mm was used.

[Comparative Example 3-2]

The same process as in Example 1 was performed, but a loofah fiber having a thickness of 0.2 mm was used.

[Comparative Example 3-3]

The same process as in Example 1 was performed, but it was wound so that the interval between the fibers of the scrubber was 0.3 mm.

[Comparative Example 3-4]

The same process as in Example 1 was performed, but it was wound so that the interval between the fibers of the scrubber was 2.1 mm.

[Comparative Example 4-1]

The same process as in Example 1 was performed, but the thickness of the Al film was set to 0.05 mm.

[Comparative Example 4-2]

The same process as in Example 1 was performed, but the thickness of the Al film was set to 1.2 mm.

[Comparative Example 4-3]

The same process as in Example 1 was performed, but the hydrophobic coating was not formed on the Al film.

[Comparative Example 4-4]

The same process as in Example 1 was performed, but the process of etching the Al film formed inside was omitted so that the Al film inside did not have a thickness gradient.

[Comparative Example 4-5]

The same process as in Example 1 was performed, but the Al film was coated on the folded portion of the box.

[Comparative Example 5-1]

The same process as in Example 1 was performed, but the depth of the sheath was set to 0.2 mm.

[Comparative Example 5-2]

The same process as in Example 1 was performed, but the depth of the sheath was set to 6 mm.

[Experimental Example 1]

The waterproof box of Example 1 and the waterproof boxes of Comparative Examples 1-1 to 1-6 were compared.

As a result of the comparison, when the Al film was not formed (Comparative Examples 1-5 and 1-6), even when coated with a waterproof solution, the corrugated cardboard box was exposed to water, causing a problem in that the corrugated cardboard box was exposed to the outside. In addition, when the waterproofing solution was not coated (Comparative Examples 1-2 and 1-6), the hydrophobic coating of the Al film was damaged by dust and the like, so the surface of the box was wet with water, and a small amount of water was inside the box in the process of unfolding the waterproofing box. And it was confirmed that it penetrated into the cross section. In addition, when the superabsorbent polymer and the scrubber fiber are not included (Comparative Examples 1-1, 1-3, and 1-4), the cross-section of the box, that is, the cut-out portion or the cross-section located on the side of the developed view of the waterproof box Water was absorbed onto the corrugated board through

The process of spraying 100 ml of water on the waterproof boxes of Examples and the boxes of Comparative Examples 1-1, 1-3, and 1-4, unfolding the boxes, and then drying them in a dry environment at 40° C. for 3 hours was repeated 10 times. As a result, the waterproof box of the embodiment was not confirmed to weaken the bursting strength compared to before the experiment. However, in Comparative Examples 1-1 and 1-3, the burst strength decreased by about 13% compared to before the experiment, and in particular, in Comparative Examples 1-4, the burst strength decreased by about 21%. For reference, in the case of Comparative Examples 1-2, 1-5, and 1-6, it was confirmed that the burst strength was reduced by about 43%, about 17%, and about 60%, respectively.

[Experimental Example 2]

The waterproof box of Example 1 and the procedures of Comparative Examples 2-1 to 2-3 were omitted.

In Comparative Example 2-1, since the waterproofing solution was not applied to the inside, a problem of moisture generated inside the box penetrating into the box may occur. In addition, in the case of Comparative Example 2-2, there was a problem that the waterproofness of the part in contact with the floor was lowered, and the waterproofing performance of the waterproof box of Comparative Example 2-3 began to deteriorate after 100 uses, and the waterproof performance began to deteriorate after 150 uses. Compared to Example 1, which deteriorated, the waterproof performance deteriorated rapidly.

In this regard, the waterproof performance is measured by pouring 10 ml of water on the surface of the box and collecting the flowing water, and when the amount of water collected is less than 8 ml, it was determined that the waterproof performance deteriorated.

[Experimental Example 3]

The waterproof box of Example 1 and the waterproof boxes of Comparative Examples 3-1 to 3-4 were compared.

The scrubber fibers may be expanded by water introduced through the side of the waterproof box member. At this time, if the thickness of the scrubber fiber is thick (Comparative Example 3-1), the scrubber fiber is detected in the box made and it may be inconvenient to carry the water, and if the thickness of the fiber is thin (Comparative Example 3-2), the box made It can be slippery and inconvenient when carrying. In addition, while the box according to Example 1 takes about 10 minutes to manufacture one product, in the case of Comparative Example 3-2, it takes more than 30 minutes, so there is a problem that the manufacturing efficiency is lowered against time.

In addition, when the scrubber fibers are tightly wound (Comparative Example 3-3), the expanded scrubber fibers come into contact with each other and the water absorbed by applying force to each other in the limited space is discharged again, causing the corrugated board to get wet. In addition, when the loofah fiber is loosely wound (Comparative Example 3-4), the loofah fiber does not absorb water flowing in through the side of the corrugated cardboard, etc., and the frictional force is low when holding the waterproof box by hand, so there is a problem of slipping. .

[Experimental Example 4]

The waterproof boxes of Example 1 and the waterproof boxes of Comparative Examples 4-1 to 4-5 were compared.

When the thickness of the Al film was thin (Comparative Example 4-1), there was a problem that the inner and outer coatings of the waterproof box were damaged due to the expansion of the scrubber fibers and the moisture absorbing material when water was sprayed. In addition, when the Al film was thick (Comparative Example 4-2), an increase in frictional force due to the moisture absorbing material could not be expected, and thus transportation was inconvenient. In addition, when the hydrophobic coating is not formed on the formed Al film (Comparative Example 4-3), the waterproof coating may be damaged by the surrounding environment during use. If there is no hydrophobic coating on the Al film exposed by the damaged coating, it is difficult to remove water located on the surface, and problems such as speeding up damage to the waterproofing liquid coating by the water may occur.

In addition, when the Al film inside the box is formed so as not to have a thickness gradient (Comparative Example 4-4), moisture formed by moisture inside the box may continue to exist in the box. In the case of the box of the embodiment in which the thickness gradient is formed inside, the moisture in the box is absorbed into the moisture absorbing material through the sheathed part due to the thickness gradient, but in the box of Comparative Example 4-4, the moisture in the box is maintained, thereby There is a possibility that the items inside the box may be damaged.

On the other hand, when the Al film is coated on the folding part of the box (Comparative Example 4-5), although the deterioration in waterproof performance was not confirmed, it is difficult to create a sheath for folding, and even if the sheath is created, the Al film can cover the cross section of the box and absorb moisture. The material may not be able to absorb moisture generated inside the box.

[Experimental Example 5]

When the depth of the sheath was shallow (Comparative Example 5-1) or deep enough to penetrate the corrugated cardboard (Comparative Example 5-2), there was a problem that it was difficult to fold the box member. In particular, in the case of Comparative Example 5-2, there was a problem of low overall strength of the waterproof box.

[Experimental Example 6]

The usability of the waterproof box of Example 1 and Example 2 was compared.

In both Examples 1 and 2, it was confirmed that the basic waterproof performance was excellent and the strength was improved compared to the existing corrugated cardboard / polystyrene box. In particular, in the case of the polystyrene box, the use convenience was increased, such as reducing noise and not generating fragments during use . That is, in the case of the waterproof box according to the present application, it can also be applied to a polystyrene-based box.

The above description of the present application is for illustrative purposes, and those skilled in the art will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present application. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present application is indicated by the following claims rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof should be construed as being included in the scope of the present application.

Claims (9)

Preparing corrugated board;
coating a moisture-absorbing material containing water-expandable fibers on the corrugated cardboard;
coating a first waterproof material on top of the corrugated cardboard;
manufacturing a waterproof box member by coating a second waterproof material on a lower portion of the corrugated cardboard;
cutting a portion of the box member so that the box member can be folded; and
manufacturing a waterproof box by folding the box member so that the side coated with the first waterproof material faces outward and the side coated with the second waterproof material faces inward;
including,
In the manufacturing method of the waterproof box,
The corrugated board is impregnated with a waterproofing solution,
Moisture introduced from the outside of the waterproof box is waterproofed by the first waterproof material,
In the incised and folded portion of the waterproof box, moisture condensed on the surface of the second waterproof material is absorbed into the moisture absorbing material,
The water-expandable fibers include superabsorbent polymer particles disposed on the corrugated cardboard and scrubber fibers wound on the corrugated cardboard,
The loofah fibers wound on the corrugated cardboard are wound at intervals of 0.1 mm to 1 mm,
The thickness of the loofah fiber is 0.1 mm to 1 mm,
The first waterproof material and the second waterproof material include an Al film and the waterproof liquid applied to the surface of the Al film,
The waterproofing solution is a mixture of 2 to 5 parts by weight of polyacrylamide, 2 to 5 parts by weight of candelilla wax, and 2 to 5 parts by weight of carboxymethyl cellulose based on 100 parts by weight of polyvinyl acetate.
The Al film suppresses the external exposure of the loofah fiber and the superabsorbent polymer and the shape of the waterproof box from being collapsed by moisture,
The Al film is formed to have a thickness gradient,
The upper part of the first waterproof material is patterned with a hydrophobic structure so that water falling on the surface of the waterproof box does not wet the waterproof box,
The second waterproof material is coated with a hydrophobicity so that water droplets condensed inside the waterproof box move to the moisture absorbing material,
A method of manufacturing a waterproof box.
delete According to claim 1,
The method of manufacturing a waterproof box, wherein the moisture generated by the temperature and humidity difference between the outside of the waterproof box and the inside of the waterproof box is absorbed by the moisture absorbing material.

delete delete delete delete delete delete

Images