KR20200037990A - box - Google Patents

Abstract

The present invention relates to an insulating and fireproof corrugated packing box made of a silica aerogel powder layer, and more specifically, to a corrugated packing box, which is made of a corrugating medium layer between an outer surface laminating layer and an inner surface laminating layer. Insulating properties of silica aerogel powder are applied to an adhesive by using the silica aerogel powder having excellent insulating properties on one side surface or both side surfaces of the corrugating medium layer. Therefore, the insulating properties of the silica aerogel powder which is nano porosity can be maximally maintained, and a fireproof function can be increased because of incombustibility of silica.

Description

Insulation and fire-resistant corrugated cardboard packaging box made of silica airgel powder layer {box}

The present invention relates to a heat-insulating and fire-resistant corrugated cardboard packaging box made of a silica airgel powder layer, and more specifically, to one or both sides of the corrugated layer in a corrugated cardboard packaging box made of a corrugated layer between the outer layer and the inner layer. Silica aerogel powder layer that can maintain the thermal insulation properties of nanoporous silica airgel powder as much as possible by imparting thermal insulation properties of silica airgel powder to the adhesive using silica airgel powder with excellent thermal insulation properties It relates to an insulating and fireproof cardboard packaging box made of.

Corrugated cardboard is formed by bonding surface paper and back paper to one side or both sides of a corrugated core bent and formed in the central portion. In the process of manufacturing corrugated cardboard, 'S' shape a pair of bone forming rollers that form a serrated concave-convex with a predetermined size on the entire outer circumferential surface by unwinding a paper roll for corrugated paper, which is a material for corrugated paper, and then passing through a guide roller and a number of tension rollers. It passes through the mold, and in this process, a flat sheet of paper is formed of an uneven corrugated core, and an adhesive is applied to the lower side of the two-sided bone forming roller.

At the bottom of the forming roller, two guide rollers for guiding the surface paper are installed to guide the surface paper supplied from the surface paper roll, and at the same time, the molding roller and the guide roller slide to transfer the surface paper to the corrugated paper at a constant pressure. The molding roller and the guide roller are heated to maintain high temperature to evaporate the moisture contained in the paper, so that the molding of the core can be stably performed, and the surface is heated to high temperature to evaporate moisture and at the same time adhere to the roller surface. During the process, the surface of the corrugated paper is adhesively formed by an adhesive whose main ingredient is starch, which is excellent in adhesion performance at a high temperature because it is transported and supplied without wrinkles.

Conventional corrugated cardboard must maintain strength and prevent deformation only by the adhesive force between the corrugated paper and surface paper repeatedly bent in an uneven shape, so double-sided corrugated cardboard is mainly used, and the weight of the cardboard box is heavy and paper raw materials are consumed a lot, increasing the cost. There is a problem.

Any silica airgel powder generally known may be used in the method of manufacturing a heat-insulating and fire-resistant corrugated cardboard made of the silica airgel powder layer according to the present invention. These airgel powders are generally prepared by a sol-gelation process. The sol-gelation process is well known to those skilled in the art [RKColloid Chemistry of Silica and Silicates 1954, chapter 6; CJ Brinker, GW Scherer, Sol-Gel Science, 1990, Chaps 2 and 3]. That is, the airgel powder is obtained by preparing the wet gel by drying the sol-gelation process of the airgel powder precursor and drying the wet gel. Specifically, the wet gel is obtained through a hydrolysis, condensation reaction and aging process by the reaction of the airgel powder precursor and water during the sol-gelation process. For example, hydrolysis proceeds by adding a catalyst to the airgel powder precursor and water in an alcoholic solvent, and a condensation reaction of the hydrolyzate proceeds to form a "sol" compound. At this time, the condensation reaction may be performed in the presence of a base or acid catalyst, but when using a metal alkoxide, it is more preferable to use a base catalyst. After the sol solution is gelled, it is aged for a sufficient time to produce a wet gel.

The method of manufacturing an insulating and refractory corrugated cardboard made of a silica airgel powder layer provided in accordance with the present invention is significantly superior in insulating performance effect compared to the prior art in which an insulating adhesive is prepared or a functional mineral material is added. In particular, it is possible to increase the fire resistance due to the chemical properties of the non-combustible silica while increasing the thermal insulation properties of the silica airgel powder as much as possible. Silica airgel powder insulating corrugated cardboard according to the present invention is provided with various adhesive properties, coating properties, etc. by adjusting the content of silica airgel powder.

In the present invention, silica airgel powder having excellent thermal insulation properties is used to impart thermal insulation properties of silica airgel powder to an adhesive, thereby maintaining the thermal insulation properties of the nano-porous silica airgel powder as much as possible and increasing the function of fire resistance due to the incombustibility of silica. An object of the present invention is to provide an insulating and fire resistant corrugated cardboard composed of an airgel powder layer.

The present invention is a thermal insulation and fire resistance made of a silica airgel powder layer, characterized in that a thermal insulation silica airgel layer is applied to one or both sides of the corrugated layer in a corrugated cardboard packaging box made of a corrugated layer between the outer layer and the inner layer. It relates to a cardboard packaging box.

In the present invention, by adding a silica airgel powder having excellent thermal insulation properties, it is possible to easily construct an adhesive pool having improved thermal insulation and fire resistance, and to manufacture thermal and fire resistant corrugated cardboard containing silica airgel that maximizes thermal insulation properties.

1 is an exploded cross-sectional view showing a cardboard packaging box of the present invention.
Figure 2 is an exploded cross-sectional view showing a cardboard packaging box of the present invention.

Hereinafter, a method of manufacturing a heat-insulating and fire-resistant corrugated cardboard made of a silica airgel powder layer according to the present invention will be described in more detail with reference to the accompanying drawings. In the description of the present invention, when it is determined that a detailed description of a related known technology or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to a client or operator, a user's intention, or a custom. Therefore, the definition should be made based on the contents throughout the specification.

The present invention is characterized in that the insulating material silica airgel layer is applied to one or both sides of the corrugated layer in the corrugated cardboard packaging box consisting of the corrugated layer 13 between the outer lamination layer 11 and the inner lamination layer 12. It relates to an insulating and fire-resistant corrugated cardboard packaging box made of a silica airgel powder layer.

In the present invention, the insulating silica airgel layer is characterized by being used by mixing the insulating silica airgel powder with an adhesive.

In the present invention, the adhesive is characterized in that it is an acrylic adhesive or a starch adhesive.

In the present invention, the insulating silica airgel layer is characterized by being used by mixing silica airgel powder in an adhesive base with 20 to 90 parts by weight per 100 parts by weight of the adhesive.

In the present invention, the insulating silica airgel layer is characterized by comprising a silica airgel layer of insulating material impregnated with a non-polar organic solvent in a weight ratio of 10 to 90 by weight with respect to the organic solvent to which the silica airgel is impregnated.

In the present invention, the non-polar organic solvent impregnated with silica airgel is characterized by using a non-polar organic solvent having no -OH group, including n-hexane, cyclohexane, and DMF.

In the present invention, the silica airgel layer of the heat insulating material is mixed with a molten polymer resin impregnated with an organic solvent to prepare nanofibers from a polymer resin mixed with silica airgel, laminated to have nanometer pores, and the silica airgel is It is contained in the pores of the nanometer level and is laminated with nanofibers so as not to be separated from the pores, and is characterized in that it is an insulating silica aerogel sheet produced by manufacturing a nanofiber spinning cloth sheet or mat.

The present invention, as shown in Figures 1 to 2, in the corrugated cardboard packaging box made of a corrugated layer 13 between the outer lamination layer 11 and the inner lamination layer 12, a thermal insulation silica airgel layer on one or both sides of the corrugated layer This coating can maintain the thermal insulation properties of the nano-porous silica airgel powder as much as possible, and provide a heat-insulating and fire-resistant corrugated cardboard made of a silica airgel powder layer capable of increasing the fire-resistance function due to the incombustibility of silica.

In the present invention, as shown in FIG. 1, the core layer 13 is composed of one layer between the outer lamination layer 11 and the inner lamination layer 12, or the outer lamination layer 11 and the inner lamination layer 12 as shown in FIG. It is preferable that the corrugated layer 13 is composed of two or more layers.

1 to 2, in the present invention, the insulating silica airgel layer can maintain the insulating properties of the nano-porous silica airgel powder as much as possible by mixing the insulating silica airgel powder with an adhesive, and increase the function of fire resistance due to the incombustibility of silica. It can provide a heat-insulating and fire-resistant corrugated cardboard made of a silica airgel powder layer.

As shown in Figures 1 to 2, the adhesive in the present invention can use an acrylic adhesive or a starch adhesive to maintain the thermal insulation properties of the nano-porous silica airgel powder as much as possible and increase the function of fire resistance due to the non-combustibility of silica. It is possible to provide an insulating and fire-resistant corrugated cardboard composed of an airgel powder layer.

1 to 2, in the present invention, the insulating material of the silica airgel layer was used by mixing 20 to 90 parts by weight of the silica airgel powder per 100 parts by weight of the adhesive to the adhesive base, thereby improving the insulating properties of the nanoporous silica airgel powder. It is possible to provide a heat-insulating and fire-resistant corrugated cardboard made of a silica airgel powder layer capable of maintaining as much as possible and increasing the function of fire resistance due to the incombustibility of silica.

1 to 2, in the present invention, the insulating material silica airgel layer is an insulating material silica airgel layer in which a silica airgel expressing insulating properties is impregnated into a non-polar organic solvent in a weight ratio of 10 to 90 by weight with respect to the organic solvent to be impregnated with the silica airgel. It is possible to provide a heat-insulating and fire-resistant corrugated cardboard made of a silica airgel powder layer capable of maintaining the heat-insulating properties of the nano-porous silica airgel powder as much as possible and increasing the function of fire resistance due to the incombustibility of the silica.

1 to 2, in the present invention, it is preferable to use a non-polar organic solvent having no -OH group, including n-hexane, cyclohexane, and DMF.

1 to 2, in the present invention, the silica airgel layer of the insulating material is prepared by mixing nanoparticles with a polymer resin mixed with silica aerogel by mixing silica aerogel impregnated with an organic solvent with a melted polymer resin to obtain nanometer-level pores. Nano-porous using the silica aerogel sheet, which is a heat-insulating silica aerogel sheet produced by laminating with the nanofibers so that the silica airgel is contained within the nanometer-level pores and is not separated from the pores. It is possible to provide insulating and refractory corrugated cardboard made of a silica airgel powder layer capable of maintaining the insulating properties of the silica airgel powder as much as possible and increasing the function of fire resistance due to the incombustibility of silica.

1 to 2, the present invention relates to a corrugated cardboard made of a heat-insulating and fire-resistant silica airgel powder layer made of a silica airgel powder layer.

When mixing the silica airgel powder (density 005-03 g / ml, thermal conductivity 5-30 mW / mK) to the starch adhesive pool base in the present invention as shown in Figures 1 to 2, the particle size of the silica airgel powder is preferably 20 μm to 50 μm. , If the particle size is less than 20㎛, it is too light to disperse evenly within the adhesive pool base, and if the particle size of the silica airgel powder exceeds 50㎛, the particle size is too large and the thickness of the adhesive layer becomes uneven during adhesion to achieve smooth adhesion. It becomes impossible.

1 to 2, the amount of the silica airgel powder added in the present invention is preferably 20 to 90 parts by weight per 100 parts by weight of the adhesive, and if the amount added is less than 20 parts by weight, the insulation performance does not come out properly and the silica airgel powder is When the addition amount exceeds 90 parts by weight, the adhesive strength of the adhesive becomes too small, and construction may not be possible.

In addition, since the starch adhesion in the present invention is a water-soluble pool prepared by mixing starch and water, when the hydrophobic silica airgel powder is simply mixed, the silica airgel powder does not mix, and even if it floats or mixes on the top of the aqueous solution, there is a disadvantage that it cannot be evenly dispersed.

Therefore, the hydrophobic silica airgel powder in the present invention can be effectively dispersed by mixing it with ethanol to make a slurry and then mixing it with an adhesive. Water can be conveniently added to the adhesive containing the silica airgel powder constituted by the present invention by appropriately adding water according to the construction method. In order to maintain the insulating properties of the silica airgel powder as it is, the surface must be hydrophobically modified silica airgel powder to maintain the nano-porosity as moisture does not penetrate inside the silica airgel powder when the adhesive is mixed.

The adhesive containing the silica airgel provided according to the present invention can be configured in a simple process compared to the prior art of preparing a thermal insulation adhesive or adding a functional mineral material, and maintaining the thermal insulation properties of the silica airgel powder as it is, thereby maintaining the thermal insulation properties of the adhesive. Not only can it be maximized, it can also improve fire resistance.

Example 1

100 g of ethanol was mixed with 120 g of hydrophobic silica airgel powder and stirred to make a slurry. After mixing 350 g of water with 200 g of starch powder, the mixture is heated to 100 ° C. for 40 minutes to form a gel state, and a silica airgel powder in a slurry state is added and stirred for 20 minutes. After cooling the stirred material, 100 g of water was further added as a viscosity modifier and stirred for 20 minutes until even dispersion. In order to measure the thermal conductivity of the mixed agitated material, a certain amount of agitated material was applied to a commercially available (30 cm × 30 cm × 1 cm), adhered and dried to measure the thermal conductivity (hotplate). At this time, the thermal conductivity was 0049 kcal / mh, and the thickness of the silica airgel adhesive layer was 052 mm.

The present invention consists of a silica airgel layer of insulating material impregnated with a non-polar organic solvent in a weight ratio of 20 to 90 by weight with respect to the organic solvent to be impregnated with silica airgel expressing thermal insulation properties.

In the present invention, it is preferable to use a non-polar organic solvent having no -OH group, including n-hexane, cyclohexane, and DMF, as the non-polar organic solvent impregnated with silica airgel.

In the present invention, a silica aerogel impregnated with an organic solvent is mixed with a molten polymer resin to prepare nanofibers from a polymer resin mixed with silica aerogels, stacked to have nanometer-level pores, and the silica airgel is the nanometer-level pores. It is preferable to use a silica aerogel sheet produced by manufacturing a nanofiber spinning cloth sheet or mat laminated with nanofibers so as not to be separated from the pores.

 <Example 2>

Impregnated with 10 ml of DMF in 20 g of silica airgel. Then, 1 ml of silane is added to modify the surface of the silica airgel. In addition, 34 g of PAN was completely dissolved in 15 ml of DMF, and the surface-modified, DMF-impregnated silica aerogel was added to the PAN solution, and stirred well to prepare a mixture of raw materials for electrospinning. Before charging the discharge portion of the electrospinning system, the viscosity of the raw material mixture is maintained to the extent that droplets can be formed without flowing out of the discharge portion. The nano-spinning is performed while the voltage is maintained at a condition of 30,000 V, and the spun nanofibers are stacked. The thickness of the laminated fabric can be arbitrarily adjusted according to the intended use. When the thickness of the laminated fabric is 02 to 05 mm, the nano-spun laminated fabric is taken and dried at about 160 ° C. to obtain a silica airgel insulating sheet formed of a PAN resin in which the silica airgel does not deviate from the inside of the laminated fabric.

<Example 3>

* When banana is stored in a normal cardboard packaging box

* When the banana is stored in the cardboard packaging box of the present invention

The banana was put in a cardboard packaging box of the present invention and a storage period test was conducted for the banana. When the bananas were stored in a normal cardboard packaging box, the bananas were retracted and discolored after 3 days. However, when the banana was stored in the cardboard packaging box of the present invention, even after 3 days, the banana did not retract, the color did not change, and long-term storage was possible.

The cardboard packaging box of the present invention can package products such as bananas, ginseng, mushrooms, vegetables, etc. that are difficult to store for a long period of time in the general atmosphere to prevent the product from being retracted or discolored for a considerable period of time, and furthermore, to prevent corruption of the product in the upper period. can do.

10: Cardboard packaging box 11: Outer lamination layer
12: inner laminar layer 13: cortical layer

Claims (7)

In the corrugated cardboard packaging box consisting of a corrugated layer 13 between the outer lamination layer 11 and the inner lamination layer 12, the corrugated cardboard packaging box is coated with a thermal insulation silica airgel layer on one or both sides of the corrugated layer Insulation and fireproof corrugated cardboard packaging box made of silica airgel powder layer. The insulating and fire-resistant corrugated cardboard packaging box of claim 1, wherein the insulating silica airgel layer is used by mixing an insulating silica airgel powder with an adhesive. According to claim 2, wherein the adhesive is an acrylic adhesive or starch adhesive, characterized in that the insulating and fireproof cardboard packaging box made of a silica airgel powder layer. According to claim 1, The insulating material of the silica airgel layer is an insulating and fireproof cardboard packaging box made of a silica airgel powder layer, characterized in that 20 to 90 parts by weight of silica airgel powder is mixed with 100 parts by weight of the adhesive base. The silica airgel layer of claim 1, wherein the silica airgel layer is composed of a thermal insulation silica airgel layer impregnated with a non-polar organic solvent in a weight ratio of 10 to 90 weight ratio to the organic solvent to which the silica airgel is impregnated. Insulation and fire-resistant corrugated cardboard packaging box made of silica airgel powder layer. The method of claim 5, wherein the non-polar organic solvent impregnated with the silica airgel is n-hexane, cyclohexane, DMF, including a non-polar organic solvent having a -OH group, thermal insulation made of a silica airgel powder layer, and Fire-resistant corrugated packaging box. The silica airgel layer of claim 1, wherein the silica aerogel layer impregnated with an organic solvent is mixed with a melted polymer resin to prepare nanofibers from a polymer resin mixed with silica airgel and stacked to have nanometer-level pores. The silica airgel is composed of a silica aerogel powder layer, characterized in that it is a silica aerogel sheet made of a nanofiber radiation cloth sheet or mat laminated with nanofibers so that it is contained within the nanometer-level pores and is not separated from the pores. Insulation and fireproof corrugated cardboard packaging box.

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