KR20200038445A - Corrugated paper and corrugated paper board using carbon heater - Google Patents

Abstract

Provided are corrugated paper plywood and base paper capable of generating heat. The corrugated paper plywood according to the present invention is corrugated paper plywood which comprises corrugated core paper which is generated by forming corrugation of a predetermined size on first corrugated base paper; and at least one liner paper generated from second corrugated base paper and bonded to at least one surface of the corrugated core paper. The second corrugated base paper is configured by stacking a surface layer positioned at one side, a rear layer positioned at the other side, and a core surface layer positioned between the surface layer and the rear layer. The core surface layer comprises a carbon fiber heating element and at least two electrodes for connecting the carbon fiber heating element to a power source, thereby generating heat when electric power is supplied by the power source.

Description

Corrugated paper and corrugated paper board using carbon heater}

The present invention relates to corrugated plywood and base paper, and more particularly, to a heated corrugated plywood and base paper.

In general, interior and exterior materials are beautifully decorated on the walls installed and installed outside and indoors of buildings. These interior and exterior materials are used for the purpose of separating the interior space into separate spaces, such as sandwich panels, urethanes, and plywood, using various materials such as wood, gypsum board, plastic, metal, and stone, or for partitioning.

As a kind of such interior and exterior materials, a method of manufacturing interior and exterior materials having improved bending strength, tensile strength and corrosion resistance by immersing a wood plywood or chipboard in a thermosetting resin is known. However, in the case of interior and exterior materials for construction manufactured by impregnating wood plywood or chipboard with resin, the time required for the process such as resin penetration time and drying time increases, which decreases productivity and increases the cost of purchasing raw materials. It causes the cost to rise.

In addition, wood plywood or chipboard is not only highly flammable in raw materials itself, but also resin is highly flammable, making it vulnerable to fire, making it unsuitable for use as interior and exterior materials, and due to the weight of the raw material itself and the weight of the cured resin, transport or storage construction There are also difficulties in the statue. In particular, environmental problems caused by resins or chemicals penetrating the wood plywood or chipboard are also large issues that cannot be ignored.

In view of this, recently, a technique of using corrugated cardboard having improved tensile strength or bending strength as an interior material for construction or a material for furniture has been proposed.

On the other hand, the need for a building plate that can generate heat has emerged for roofing materials used in areas with heavy snow or floor heating.

Therefore, there is a need to develop a technology capable of heating while simultaneously improving tensile strength and bending strength in interior and exterior materials using corrugated board.

Korean Patent Publication No. 1378746 (Registration Date: March 21, 2014)

The technical problem to be achieved by the present invention is to provide a corrugated cardboard plywood and base paper capable of generating heat.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

Corrugated cardboard plywood according to an embodiment of the present invention for achieving the above technical problem, a bone core produced by forming a predetermined size of bone on the first cardboard base; And at least one liner paper produced from a second corrugated paper base and joined to at least one side of the corrugated paper, wherein the second corrugated paper base has a surface layer located on one side, a back layer located on the other side, and the surface layer. A core layer located between the rear layers is stacked, and the core layer may include a carbon heating element and at least two electrodes connecting the carbon heating element to a power source.

The surface layer and the back layer may be made of fiber tissue.

The surface layer and the back layer may include a natural fiber layer and an optical fiber layer, and may include at least one of a regenerated fiber layer and a synthetic fiber layer.

The natural fiber layer includes at least one component of cotton, hemp, silk, wool, and angora, and the optical fiber layer includes at least one component of carbon fiber, glass fiber, metal fiber, mineral fiber, and rock fiber. The regenerated fiber layer includes rayon fiber, and the synthetic fiber layer may include at least one component of nylon, polyester, urethane, and acrylic.

The surface layer may be a natural fiber layer, and the back layer may be an optical fiber layer.

The deep layer further includes a first deep layer and a second deep layer, the surface layer is a natural fiber layer, the rear layer is an optical fiber layer, and the second deep layer is a regenerated fiber layer or a synthetic fiber layer.

The carbon heating element may be carbon ink or carbon powder evenly applied to the core layer.

The carbon heating element may be carbon fibers arranged in the core layer.

The carbon fiber may have a plurality of bent portions and be arranged on the core layer.

A corrugated base paper used for at least one of a corrugated paper and a liner paper which are bonded to each other to form a corrugated cardboard by bonding to each other, wherein the corrugated base paper is a surface layer located on one side, a back layer located on the other side, and the surface layer and the back surface The core layer located between the layers is stacked, and the core layer includes a carbon heating element and an electrode connecting the carbon heating element to a power source, and the surface layer, the rear layer and the core layer are binders with each other. The strength can be improved by joining with.

The surface layer and the back layer are composed of fiber tissue, and the fiber tissue can be produced by mixing the regenerated pulp with an optical fiber in a certain ratio.

At least one layer of the surface layer and the back layer may be formed of fiber yarns formed in a lattice shape intersecting each other.

The carbon heating element may be carbon ink, carbon powder or carbon fiber evenly applied to the core layer.

Other specific matters of the present invention are included in the detailed description and drawings.

Corrugated plywood and base paper produced by the composition for producing corrugated cardboard according to the present invention can generate heat while maintaining strength without deformation due to heat and moisture.

Also, when the carbon fiber heating element is ignited due to overheating, it does not spread as a secondary fire.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present specification. Other effects not mentioned will become apparent to those skilled in the art from the description of the claims.

1 is a perspective view showing the shape of a single double-sided corrugated cardboard.
Figure 2 is a perspective view showing the shape of the double-sided cardboard.
Figure 3 is an exploded perspective view showing the structure of a four-layer corrugated cardboard base paper according to an embodiment of the present invention.
Figure 4 is a perspective view showing the structure of a four-ply corrugated base paper according to an embodiment of the present invention.
5 is a view showing a state in which carbon fibers are used as a carbon heating element according to another embodiment of the present invention.
6 is a perspective view showing a case in which carbon fibers aligned with a carbon heating element of a core layer according to another embodiment of the present invention are used.
7 is a view showing the structure of a corrugated plywood according to another embodiment of the present invention.
8 is a view showing a process for producing a three-layer corrugated cardboard base paper according to an embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete, and the ordinary knowledge in the technical field to which the present invention pertains. It is provided to fully inform the holder of the scope of the invention, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

In addition, the embodiments described herein will be described with reference to perspective views, cross-sectional views, side views and / or schematic views, which are ideal exemplary views of the present invention. Therefore, the shape of the exemplary diagram may be modified by manufacturing technology and / or tolerance. Accordingly, the embodiments of the present invention are not limited to the specific shapes shown, but also include changes in shapes generated according to the manufacturing process. In addition, in each of the drawings shown in the present invention, each component may be illustrated to be slightly enlarged or reduced in consideration of convenience of description.

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

* Corrugated plywood used for interior and exterior materials or packaging is a liner paper used for the inner, outer or double-sided corrugated cardboard of the corrugated cardboard depending on its application conditions, and a corrugated paper used to construct a corrugated bone between two liner papers. It is largely divided into, and these liner papers and corrugated paper are basically formed from corrugated paper.

The corrugated base paper is recycled from pulp or high paper. As the pulp, white kraft pulp (UKP), bleached kraft pulp (BKP) is used, and OCC (Old Corrugated Container), KOCC, is used as high paper. AOCC, JOCC, EOCC are used. The kraft pulp refers to chemical pulp that beats wood or vegetable fiber raw materials with a chemical solution of sodium hydroxide and sodium sulfide.

Overall, the corrugated paper is recycled through a plurality of processes as follows. However, some of the above steps may be omitted or changed to other steps depending on the intended nature of the cardboard.

(1) Pulping process in which raw materials and water are added to release to a porridge of the required concentration,

(2) A cleaning process that filters undissociated or foreign substances in raw materials over several times,

(3) Thickening process of concentrating the thinly filtered raw material to the required state to increase the efficiency of the next process and paper formation,

(4) Refining process that improves the beauty by imparting spreading property when forming a thin paper surface by rubbing and breaking the fibers by applying strong friction and shearing to the raw materials,

(5) Chemical process to mix chemicals in paper raw materials,

(6) This is a process of forming a paper sheet for each raw material that has been chemically and physically completed, and forming a thin layer from as little as 15g to as much as 150g per square meter, overlapping the forming process.

(7) Pressing process to increase the stability and drying efficiency of the paper by draining water by suction, compression, or other methods from the paper formed by stacking multiple layers in the process of making a paper,

(8) Drying process to dry the paper to have a reference moisture of about 7 to 8%,

(9) As a final finishing process of the formed paper, the thickness of paper, which is 6 ~ 7m wide, is reduced in thickness variation before and after, and the surface is processed to improve gloss and beautifulness, and printability during subsequent processing. Calendering process to improve the

(10) Winding process of winding the recycled paper on a roller.

The corrugated cardboard recycled through the above process is used to generate corrugated cardboard. The corrugated base paper is first formed of a central corrugated paper (medium) and an outer surface of the liner paper, and the finished corrugated paper is obtained through adhesion between the corrugated paper and the liner paper.

These corrugated boards can be mass-produced, lightweight and small in volume, convenient for storage, thus reducing logistics costs during transportation, easy packaging, mechanization, automation, and strength and shape suitable for packaging conditions. It has the advantage of giving elasticity to the impact and preventing damage to the contents. On the other hand, the disadvantages of corrugated cardboard are that it is weak to moisture and absorbs moisture, so the compressive strength can be lowered, the cost is relatively high when producing small units, and it is easy to break or bend under strong pressure when handling cargo.

The weakness in terms of the structural strength of the corrugated cardboard allows the corrugated cardboard to be used only as a cushioning material or wrapping paper, and can act as a fundamental limit to be applied to construction interior and exterior materials or other fields requiring significant strength.

Corrugated plywood currently used in the industry has a variety of thickness, bone height and number of layers according to the various applications used. 1 shows the structure of a single double-sided corrugated cardboard 10. These double-sided corrugated cardboard 10 is a liner paper (12, 14) attached to both sides of the central corrugated paper (16) in the shape of a wave, most often used as a packaging box.

The A-sided double-sided corrugated cardboard 10 shown in FIG. 1 has a bone height of about 4.5 to 4.8 mm, and a central corrugated core 16 with approximately 34 bone marrow per 30 cm and two liner papers 12 and 14 on the outer surface are bonded. Form. In the corrugated cardboard industry, bone height and bone marrow are standardized to some extent, but the present invention is not limited thereto, and it is also possible to form various bone sizes according to the use of the corrugated cardboard according to the present invention.

In order to improve the strength and cushioning properties of a single corrugated cardboard structure as shown in FIG. 1, a double-sided corrugated cardboard 20 or a triple-sided corrugated cardboard as shown in FIG. 2 is also used.

The double-sided corrugated cardboard 20 is a corrugated cardboard made by using two corrugated papers formed in a wave shape, and can be regarded as a structure in which the same single-sided corrugated cardboard and double-sided corrugated cardboard are overlapped. The designation of the double-sided corrugated cardboard 20 mainly consists of a molded corrugated core, and structurally, it is possible to make a combination of various bones, so the physical properties of the finished corrugated cardboard vary depending on which bone it is combined with. The thickness of the single-sided corrugated cardboard 10 shown in FIG. 1 is increased, so that it is stronger than the double-sided corrugated cardboard 10 in terms of physical properties, and particularly exhibits a significant increase in vertical compressive strength. Therefore, it is used for packaging fragile objects or heavy objects, and is also used for packaging contents that are stored over a long period of time or contents having a high moisture content such as fruits and vegetables.

As an example of such a double-sided corrugated cardboard, FIG. 2 shows a combination of B-corrugated cardboard 22 and A-corrugated cardboard 24 as BA-sided double-sided corrugated cardboard. EB bone double-sided corrugated cardboard may be used.

On the other hand, triple-sided double-sided corrugated cardboard (not shown) is made by using three corrugated cardboard formed in a wave shape, and has a structure in which two identical single-sided corrugated cardboard and double-sided corrugated cardboard are synthesized. The designation of the triple-sided corrugated cardboard is determined based on the shaped corrugated core, and the used bone can be made by combining various bones such as A, B, and E in the same shape as the double-sided corrugated cardboard. Because triple-sided corrugated cardboard basically uses 3 types of bone, it has higher stiffness than double-sided corrugated cardboard. When used as a box, triple-sided double-sided corrugated cardboard is often used as a packaging material in place of packaging heavy items that were packed in wooden boxes. In addition, it is often used in combination with wood pallets or skids, and a combination of both is used to nail nails using special washers such as steel bands.

The types of the corrugated cardboard shown in FIGS. 1 and 2 are in a direction in which the bones of the individual corrugations constituting this are parallel to each other. However, the present invention includes, but is not limited to, the directions of the bones in the corrugated cardboard are displaced from each other or are preferably arranged at right angles. As such, if the directions of the bones are arranged at right angles to each other, there is an advantage that the interference between the bones is reduced so that the thickness of the final corrugated cardboard can be appropriately reduced.

In the present invention, it is intended to basically use a multi-layered corrugated paper having two or more layers. 3 is a view showing the structure of a four-ply corrugated base paper 110.

Basically, the corrugated base paper 110 according to the present invention is interposed between the surface layer 111 located on one side of the outside, the rear layer 112 located on the other side of the outside, the surface layer 111 and the back layer 112. It consists of at least one or more deep layer (113, 114). Chemicals such as a sizing agent, a dehydration accelerator, an intelligence enhancer, and a surface treatment agent may be applied to the plurality of layers 111, 112, 113, and 114 to improve performance.

As shown in Figure 3, each layer 111, 112, 113, 114 of the four-layer corrugated base paper 110 may be formed of the same or different materials. The surface layer 111 and the back layer 112 may be composed of natural fibers and optical fibers, respectively, the first core layer 113 is a carbon heating element 116, and the second core layer 114 is regenerated fiber or synthetic fiber. It can be composed of. However, the configuration of the first deep layer 113 and the second deep layer 114 may be interchanged, and the deep layer 113 and 114 may be composed of one layer.

The natural fiber includes cotton, hemp, silk, wool, angora, and the like, and the optical fiber includes carbon fiber, glass fiber, metal fiber, mineral fiber, and rock fiber. In addition, the regenerated fiber is preferably rayon fiber, and the synthetic fiber includes nylon, polyester, urethane, and acrylic. The carbon heating element 116 is preferably carbon fiber, carbon ink, and carbon powder.

The fibers used for the surface layer 111 and the back layer 112 may be opposite to each other, and the first deep layer layer 113 and the second deep layer layer 114 are integrated into one deep layer layer 113 and 114. Regenerated fibers or synthetic fibers may be used, but the composition of the carbon heating element 116 is not changed. However, Table 1 above is only an example, and as long as two or more layers of corrugated paper are used, the type of the fiber may be variously selected. For example, natural fibers or optical fibers may be employed as the second core layers 113 and 114. In addition, it is also possible to manufacture by mixing raw materials of any one of the above-described surface layer 111, the deep surface layers 113 and 114, and the rear layer 112 together with recycled pulp. Realistically, when the corrugated base paper 110 is for corrugated paper, it is preferably made of two or more layers, and when the corrugated paper base 110 is for liner paper, it is preferably made of three or more layers. Alternatively, the corrugated paper base 110 for corrugated paper made of two or more layers may be used as a backing paper.

The corrugated base paper 110 may be formed by including a mesh grid layer (not shown). Here, a mesh lattice layer is formed between the surface layer 111 and the back layer 112, and the mesh lattice layer is formed of fiber yarns having a lattice shape intersecting each other. It is preferable that the size of the grid is about 0.5-3 cm on one side of the grid. By adding the mesh grid layer, the toughness and tensile strength of the corrugated base paper 110 can be additionally improved.

The first deep surface layer 113 includes a carbon heating element 116 and at least two electrodes 115 connecting the carbon heating element 116 to a power source.

The carbon heating element 116 is a heating element composed of carbon, and when electric power is supplied, it converts electric energy into thermal energy and radiates due to high resistance. The carbon heating element 116 of the present invention may be a surface heating element formed in a plate shape by evenly coating a coating material such as carbon ink or carbon powder or dispersing it in a synthetic resin, but the type of the carbon heating element 116 is not limited thereto.

The electrode 115 is a component having conductivity to allow current to pass through, and may be formed of metal, but a conductive adhesive may also be used, and the electrode 115 is not limited thereto. In one embodiment of the present invention, although the electrodes 115 are shown extending from one end of the first deep surface layer 113 in one direction, a total of two are formed one by one, but the number and placement thereof are not limited thereto.

The electrode 115 of the present invention can be connected to an electric wire and a power source, which will be described later, and can be supplied with electric power, and the supplied electric power can be transmitted to the carbon heating body 116 to generate heat.

At this time, due to the layered structure between the layers, the surface layer 111 and the electrode 115 come into contact, and the second deep surface layer 114 or the back layer 112 and the electrode 115 come into contact with the other surface. The layer in contact with the electrode 115 may be made of an insulator, or some surface of each layer contacting the electrode 115 may be made of PVC, polyester, polyethylene, and the like, which are polymer insulating members.

4 is a perspective view showing the structure of a four-ply corrugated base paper 110 according to an embodiment of the present invention.

Referring to FIG. 4, the corrugated base paper 110 according to an embodiment of the present invention includes a surface layer 111, a back layer 112, and a deep surface layer 113 positioned between the surface layer 111 and the back layer 112, 114). The layers 111, 112, 113 and 114 can be improved in strength by bonding to each other by a binder. It is possible to form a corrugated plywood using the corrugated base paper 110 thus formed.

By supplying electric power to the electrodes included in the deep surface layers 113 and 114 of the corrugated base paper 110 formed as described above, heat is generated from the carbon heating element, and heat is radiated outside the corrugated base paper 110.

5 is a view showing a state in which carbon fibers are used as the carbon heating element 216 of the core layer 213 according to another embodiment of the present invention.

The carbon fiber may be a general carbon fiber composed of woven carbon only, or may be a fiber coated with a carbon powder on a conductive thread, and any fiber that generates heat by a current flowing through carbon by the electrode 215 may be used. It can be used as a carbon heating element (216). The carbon heating element 216 of the present invention may be a planar heating element in which carbon fibers are evenly distributed by dispersing the carbon fibers in a mesh form, but the distribution method is not limited thereto.

6 is a perspective view showing a case in which carbon fibers 316 aligned with a carbon heating element of the core layer 13 according to another embodiment of the present invention are used.

Referring to FIG. 6, it can be seen that the carbon fibers 316 are arranged in a spiral shape on the first core layer 313 while maintaining a predetermined distance, like an electric floor. In FIG. 6, one long carbon fiber 316 is bent a total of four times, and a portion of the carbon fiber 316 is arranged to be spaced apart at a predetermined interval, and one end and the other end of the carbon fiber 316 are different from each other. Arranged to be in contact with the electrode 315, a plurality of bent portions 317 of the carbon fiber 316 are disposed to contact each electrode. However, since the arrangement of the carbon fibers 316 is to ensure that the entire surface is evenly heated as much as possible, the number of times the carbon fibers 316 are bent is not limited to this, and a plurality of carbon fibers 316 is not limited thereto. Carbon fiber 316 may be used, and a carbon heating element may be configured by allowing both ends to contact both electrodes without bending a separate straight carbon fiber.

7 is a view showing the structure of the corrugated plywood 100 according to another embodiment of the present invention.

Corrugated cardboard plywood 100 according to an embodiment of the present invention is formed between the liner paper (107, 108) between the liner paper (107, 108) in the form shown in Figure 1 or 2, the electrode as shown in Figure 7 It can be completed as the connected wire 102 is connected to the controller 103 for transmitting power.

The controller 103 is connected to an external power source (not shown), transmits power received from the external power source to the electrode of the deep layer through an electric wire, and generates heat by supplying power to the carbon heating element by the electrode. However, the controller 103 may also include an internal power source such as a battery. On the other hand, the controller 103 is equipped with a means such as a dial to adjust the amount of power delivered to the liner paper 107, 108 to control the amount of heat generated by the liner paper 107, 108 formed of the corrugated paper base paper 100 of the present invention. This is possible. The corrugated base paper 100 of the present invention in which the carbon heating element is formed may be used only for the upper liner paper 107 or the lower liner paper 108, or may be used for both the liner papers 107 and 108 on both sides, and the corrugated paper 104 may be used. It can also be used.

In the structure as shown in Fig. 1 or 2, since each bone is bonded to the liner paper, when the external load or compressive force acts on the corrugated cardboard, structural breakdown will occur if it exceeds the limit of the bonding force between the liner and the bone. You can. In other words, the structural strength cannot be increased because the bone core, which acts as a resistance to external loads or compressive forces, is independently bonded to the liner. Even if the two bones are the same size, it is difficult to expect a large strength likewise because each goal is only connected to the liner and there is no interaction between them.

Therefore, as shown in Figure 7, the corrugated cardboard plywood 100 according to another embodiment of the present invention has two corrugated cores 104 and 105 having the same bone size with each other, and is joined 106 so that their respective bones are in contact with each other. The bone cores 104 and 105 are again joined to the outer liner papers 107 and 108, respectively. In addition, a decorative plate (not shown) having various shapes and patterns may be attached to the upper surfaces of the upper liner papers 107 and 108.

According to this, when an external load or a compressive force acts on the corrugated cardboard plywood 100, the same sized bones that are in contact with each other (106) provide spring-like support between each other, such as in FIGS. 1 or 2 It can exhibit high stiffness compared to the conventional corrugated plywood structure. That is, when the external load or the compressive force acts, the conventional corrugated cardboard structure as shown in FIG. 1 or 2 causes a relative lateral movement between the corrugated bone and the liner, the corrugated cardboard plywood 100 according to the present invention as shown in FIG. 7 The structure is that relatively high stiffness is obtained because the two bones provide mutually symmetric support.

This can be seen more clearly by looking at the cross section of the structure formed by the bone core. Two bones of the same size are mutually bonded 106 to form a central structure, and the central structure represents a structure surrounded by two liner papers 107 and 108. As described above, the corrugated plywood 100 according to another embodiment of the present invention is basically similar to a truss structure known to exhibit the highest stiffness when using the same material. Therefore, the corrugated plywood structure proposed in the present invention can provide high rigidity and material efficiency. As described above, according to the present invention, since a separate center (liner) serving as a boundary between the two cortical cores 104 and 105 is omitted, both joints 106 are formed at the correct bone position of the cortical bones 104 and 105. Since the strength can be increased and the center is removed, the effect of cost reduction is also obtained.

8 shows a process for generating a corrugated base paper 110 in three layers according to an embodiment of the present invention. Those skilled in the art will fully understand that even if the number of layers of the corrugated base paper 110 is increased, the corrugated base paper 110 can be generated in the same manner.

Each of the raw materials forming the layer of the corrugated base 110 is fed into the hoppers 91a, 91b, 91c, and the plurality of layers 111, 112, 113, 114 discharged from the hoppers 91a, 91b, 91c are blown It is cooled in furnaces 92a, 92b, 92c. As the plurality of layers 111, 112, 113, and 114 pass through the plurality of rollers 93a, 93b, and 93c, a binder (eg, starch) is applied to the back of some of the layers 113, 114. In FIG. 8, a part of the rollers 93a and 93b illustrates a bookbinding method in which a part of the rollers 94a and 94b containing the binder is submerged, but instead or in addition to this, the binders are sprayed 121a, 121b, and 121c. It is also possible to apply. In addition, although it is also possible to simply apply a binder as described above, it may be possible to apply a solution (immersion solution) by mixing with the binder or to apply only the solution.

As described above, after the process of applying the binder, the plurality of layers 111, 112, 113, and 114 are mutually adhered by the base paper generating roller 95 to be formed as one corrugated base paper 110.

Meanwhile, in FIG. 8, for example, some of the plurality of layers 113 and 114 are not generated in separate hoppers 91a and 91c unlike other layers, and may be provided in advance and wound on the reel 90. . In particular, it is advantageous if the layers 113 and 114 are supplied rather than directly produced, or when the production process takes more time than other layers 111 and 112 (for example, mesh grid fabric, carbon fiber sheet, etc.) Unlike other layers, it may be preferable to separately produce or obtain and wind it directly onto the reel 90.

When the corrugated base paper 110 is produced in a manner of laminating a plurality of layers rather than making it as a single layer, the strength of the base paper of the corrugated cardboard produced for corrugated cardboard plywood can be better absorbed by the binder or immersion liquid. It will be higher.

As described above, in order to use corrugated cardboard for various purposes, various bone sizes and corrugated cardboard layers are combined, but it is difficult to overcome the limitations of the strength of corrugated cardboard, which is basically made of paper. To replace it, special treatment is needed to improve the structural strength of the corrugated cardboard. To this end, there is a method of improving strength by immersing in a corrugated paper or a specially formulated immersion solution (solution). Therefore, let's find out how to improve the strength by immersing the corrugated paper in an immersion solution.

The corrugated paper itself can be immersed in the immersion liquid reservoir before forming the corrugated paper. This immersion process is preferably applied to the corrugated paper itself rather than to the finished corrugated paper. This is because the method of immersing the resulting corrugated cardboard may take a little time to immerse, and it may be difficult to apply the immersion process at the corrugated cardboard stage because the original shape of the corrugated cardboard may be deformed during the absorption of the mixture. On the other hand, in the method of immersing the corrugated cardboard base paper, the manufacturing process of the corrugated cardboard base paper and the manufacturing process of the corrugated cardboard are separated, and the absorption rate of the immersion liquid is relatively fast and can be dried in a short time, so there is little problem that the circular shape of the aforementioned cardboard is deformed. Therefore, there is an advantage that can be applied to mass production.

In the corrugated paper immersion process, corrugated paper supplied from corrugated paper winding reels is supplied in parallel, for example, in three plies (minimum two plies). That is, a corrugated cardboard base paper to be used as a liner paper on both sides of the corrugated cardboard and a corrugated cardboard paper to be formed as a corrugated paper therebetween may be provided from the corrugated cardboard winding reels, respectively.

Each of these corrugated papers is immersed in a immersion liquid storage tank for a predetermined time, and then supplied to the next drying chamber to undergo a drying process or a drying and heating process. Corrugated paper is processed at a high temperature of approximately 180 degrees Celsius or more, so that deformation due to heat generated from the carbon heating element to be described later does not easily occur. Likewise, in addition to the process of immersing the cardboard base in the immersion liquid storage tank, it is also possible to apply the solution containing at least a part of the immersion liquid component to the cardboard base by spraying. Compared to the method of immersing in the immersion liquid storage tank, this spray method has an advantage that it is structurally simple and enables quick application and drying. Of course, it is also possible to absorb the immersion liquid in the corrugated base paper only by the spray method without using the immersion liquid storage tank.

On the other hand, depending on the requirements, it may also be considered to immerse only the central corrugated cardboard to be used as the core. The composition of the immersion liquid may vary depending on the use of corrugated plywood as a substitute for interior and exterior materials of construction as a medium density fiberboard (MDF) or particle board (PB) and when used as a substitute for paper pallets.

In the case of MDF or PB substitute, the immersion liquid (water-soluble) may be composed of silica, LIMESTONE (calcium carbonate), mackban stone, alumina, acrylic, enamel resin, calcium silicate, water, alcohol (methanol, ethanol or benzene). Preferably, the immersion liquid is 30 to 45% by weight of silica, 10 to 20% of LIMESTONE (calcium carbonate), 5 to 15% by weight of maculite, 5 to 10% of alumina, 5 to 12% by weight of acrylic, It may be composed of 9 to 18% by weight of enamel resin, 6 to 13% by weight of calcium silicate, 13 to 20% by weight of water, and 7 to 15% by weight of alcohol (methanol, ethanol or benzene).

The strength of the corrugated cardboard can be further improved by selectively adding subcomponents such as zeolite, titanium dioxide, silicate, water repellent, polymer, anionic agent, wood vinegar, and sodium to the main component. Here, as the type of water repellent, wax, paraffin, nigreen, and the like are used to prevent the corrugated base paper and the corrugated plywood made therefrom from causing moisture deformation. In addition, capsule-like ingredients containing natural flavors such as phytoncide may be further added. These capsule-like components emanate a natural scent by gradually breaking the outer edge of the capsule over time. In addition, a component for flame retardant treatment is added to prevent the occurrence of a fire due to overheating of the carbon heating element, leading to a secondary fire. The amount in which sub-components can be added is preferably shown in Table 1 below.

ingredient Approximate weight% Zeolite 5 Titanium dioxide 2 Silicate 2 Water repellent 7 Polymer 7 Anionic agent 3 Wood vinegar 3 salt 5

When all or some of the components in Table 1 are added, the weight percent of the remaining components in Table 1 may be reduced uniformly according to the added component. Meanwhile, in the case of replacing the paper pallet, the immersion liquid It may be composed of silver melamine resin, phenol resin, urethane resin, enamel resin, polysol, calcium silicate, herb, triazole, acrylic, polymer, alcohol (methanol, ethanol or benzene), water repellent. Preferably, the immersion liquid is 15 to 20% by weight of melamine resin, 20 to 30% by weight of phenolic resin, 10 to 15% by weight of urethane resin, 5 to 15% by weight of enamel resin, 4 to 7% by weight of poly Sol, 5 to 10% by weight of calcium silicate, 2 to 3% of wood vinegar, 3 to 5% of triazole, 7 to 15% by weight of acrylic, 3 to 7% by weight of polymer, 10 to 15% by weight of alcohol ( Methanol, ethanol or benzene), 5-7% by weight of water repellent. In an immersion liquid reservoir having such a component, the cardboard base is completely immersed in less than about 10 seconds. Subsequently, the immersed corrugated paper is dried in a drying chamber at approximately 100-150 degrees Celsius. Since the dried corrugated paper has a drying rate of approximately 70-80%, the corrugated paper is in a state that can be wound on a reel without being adhered even if the corrugated paper is in contact with each other. At this time, the amount of moisture contained in the corrugated base paper is stably maintained within a range of 6 to 8%.

As described above, the strength of the corrugated cardboard produced by containing the immersion liquid of the present invention is compared with that of MDF or PB used as interior and exterior materials for existing construction. The test results below were sample size of 270x270mm, and the distance between them was 220mm, which was conducted according to the wooden bending test method according to KS F 2208, 19.5 ± 1.5 ℃ and (48 ± 1)% R.H. It was conducted in the environment.

division sample Thickness (mm) Flexural breaking load (N) Comparative Example 1 MDF 12.3 2.689 Comparative Example 2 PB 15.2 2.544 Example 1 2EB 12.1 2.594 Example 2 2EBBB 18.2 3.935

Comparative Example 1 is an MDF sample with a thickness of 12.3 mm, and Comparative Example 2 is a PB sample with a thickness of 15.2. On the other hand, Example 1 of the present invention is a multi-corrugated cardboard made of 12.1 mm thick by alternately stacking multiple sheets of E and B cardboard, and Example 2 of the present invention is based on one E cardboard and three B cardboards as a basic unit. It is a multi-corrugated cardboard made of 18.2mm in thickness by overlapping multiple sheets. Looking at these results, Example 1 and Comparative Example 1 (MDF) having the same thickness show almost the same flexural breaking load, and compared to Example 1 Although Example 2 (PB) has a thicker thickness, it shows a flexural breaking load similar to that of Example 1. In addition, as in Example 2, it can be seen that when the thickness is slightly thicker than that of Comparative Examples 1 and 2 (18.2 mm), the bending fracture load is significantly improved. There was no separate test for tensile strength other than the improvement of the flexural breaking load or bending strength, but it is easy to understand that the tensile strength is relatively higher than that of MDF or PB due to the properties of the corrugated cardboard (characteristics of the corrugated cardboard being disposed in the longitudinal direction). As described above, if the bending strength of corrugated cardboard is relatively high or equal to that of conventional MDF or PB, it is very suitable for use as a interior and exterior material for construction or as a substitute for wood as a lightweight material with high tensile strength and relatively low production cost. It can be said.

When using the corrugated cardboard according to the present invention as an interior and exterior material for construction, etc., in addition to the strength aspect, it should also be considered whether it does not discharge substances harmful to the environment. According to Article 10 (1) on pollutants emitted from building materials in the Indoor Air Quality Control Act of multi-use facilities, general materials are formaldehyde, total volatile organic compounds (TVOC), and toluene are 0.12 each. , 4.0 and 0.08 mg / m2h.

Table 3 below shows the release amounts of formaldehyde, TVOC and toluene for the examples according to the present invention (unit: mg / m2h). According to this result, it can be seen that the examples of the present invention satisfy the regulations for each component, and particularly, in the case of formaldehyde and TVOC, it shows a value far below the reference value.

division Formaldehyde TVOC toluene Example 1 0.009 0.171 0.069 Example 2 0.006 0.111 0.001

As described above, the corrugated cardboard produced by using the immersion liquid according to the present invention has not only sufficient strength to be used as a building interior and exterior material or wood substitute, but also has a very low emission of environmental pollutants, and thus its utility is very high. On the other hand, in order to reduce the time required for such a drying process, a process of weaving the corrugated base paper absorbed with the solution may be additionally applied. This process is performed when the corrugated base paper passes the pair of rollers after absorbing the immersion liquid, and the amount of the immersion liquid contained in the corrugated base paper (coating amount) can be adjusted to a desired target by adjusting the gap between the rollers. After immersion, the dried corrugated paper base is formed while passing through the bone getter, and the peripheral liner paper is simply passed through a roller and then joined in a corrugated joint by heating and pressing to form a single corrugated paper. Conventional corrugated cardboard necessarily required a separate adhesive in bonding the corrugated paper and liner paper (or backing paper), but the corrugated paper coated by being immersed and coated according to the present invention is heated and pressurized without additional adhesive, and corrugated paper is used. By fusion between the components of the immersion liquid contained in the bonding of the cardboard can be made. Of course, as in the prior art, a process of applying a separate binder to one surface of the corrugated paper or liner paper may be used in bonding the corrugated paper and the liner paper.

Such corrugated cardboard may be produced as many bone marrows as desired, such as single-sided corrugated cardboard, double-sided corrugated cardboard, triple-sided or quadruple-sided corrugated cardboard, depending on its use or machine performance.

The corrugated cardboard produced through the corrugated joint can then be formed while passing through the slitter, cut into a predetermined size by a cutter, and stacked in a stacker and stored.

In the above description, the process of treating the corrugated cardboard base paper in a manner that is immersed in the immersion liquid storage tank has been described. However, it is also possible to absorb the solution as described above to the corrugated paper in another way, not limited to this immersion method. In another embodiment, it is also possible to obtain the corrugated paper with improved strength by absorbing the immersion liquid in the process of producing the corrugated paper. In this case, since the corrugated base paper itself mounted on the winding reel is already strengthened by the immersion liquid, a separate spray, immersion and drying process can be omitted, thereby improving production speed. As such, due to the additional process for enhancing the strength and workability of the corrugated paper base itself, it may be an additional burden on the cost side than simply using recycled paper using pulp or paper. However, compared to the price of MDF or PB, which is basically used as interior and exterior materials for construction or paper pallets, these additional costs will not be a problem overall as the price of cardboard is significantly lower.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing its technical spirit or essential features. You will understand. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

10, 22, 24: corrugated cardboard 20: double-sided corrugated cardboard
12, 14, 107, 108: liner paper 16, 104, 105: corrugated paper
91a, 91b, 91c: hopper 92a, 92b, 92c: blower
93a, 93b, 93c: roller 94a, 94b: binder storage tank
95: paper generating roller 100: corrugated plywood
102: wire 103: controller
106: bone junction 110: corrugated cardboard base
111: surface layer 112: back layer
113, 213, 313: first deep layer 114: second deep layer
115, 215, 315: electrode 116, 216: carbon heating element
316: carbon fiber 317: bent portion

Claims (13)

A bone core produced by forming a bone of a predetermined size on the first corrugated paper; And
A corrugated plywood comprising at least one liner paper produced from a second corrugated base paper and joined to at least one side of the corrugated paper,
The second cardboard base paper,
It is composed of a surface layer located on one side, a rear layer located on the other side, and a deep layer positioned between the surface layer and the rear layer.
The core layer includes a carbon heating element and an electrode connecting the carbon heating element to a power source, corrugated plywood. According to claim 1,
The surface layer and the back layer are corrugated plywood made of fiber tissue. According to claim 1,
The surface layer and the back layer,
Corrugated plywood comprising a natural fiber layer and an optical fiber layer, and comprising at least one of a regenerated fiber layer and a synthetic fiber layer According to claim 3,
The natural fiber layer includes at least one component of cotton, hemp, silk, wool, and angora, and the optical fiber layer includes at least one component of carbon fiber, glass fiber, metal fiber, mineral fiber, and rock fiber. The regenerated fiber layer includes rayon fiber, and the synthetic fiber layer is corrugated plywood comprising at least one component of nylon, polyester, urethane, and acrylic. According to claim 1,
The surface layer is a natural fiber layer, the back layer is an optical fiber layer corrugated plywood. According to claim 1,
The deep layer further includes a first deep layer and a second deep layer,
The surface layer is a natural fiber layer, the back layer is an optical fiber layer, and the second core layer is a regenerated fiber layer or a synthetic fiber layer. According to claim 1,
The carbon heating element is a corrugated plywood which is a carbon ink or carbon powder evenly applied to the core layer. According to claim 1,
The carbon heating element is a corrugated plywood which is a carbon fiber arranged in the core layer. The method of claim 8,
The carbon fiber is a corrugated plywood having a plurality of bent portions and arranged on the core layer. A corrugated paper used for at least one of a corrugated paper and a liner paper bonded to each other to form a corrugated cardboard,
The corrugated base paper is constructed by laminating a surface layer located on one side, a back layer located on the other side, and a deep layer positioned between the surface layer and the back layer,
The core layer includes a carbon heating element and at least two electrodes connecting the carbon heating element to a power source,
The surface layer, the back layer and the core layer are bonded to each other by a binder to improve the strength of the corrugated paper. The method of claim 10,
The surface layer and the back layer are composed of fiber tissue,
The fiber tissue is a corrugated base paper produced by mixing fiber in a certain proportion to recycled pulp. The method of claim 11,
The at least one layer of the surface layer and the back layer is a corrugated base paper formed of fiber yarns formed in a lattice shape intersecting each other. The method of claim 10,
The carbon heating body, corrugated plywood that is a carbon ink, carbon powder or carbon fiber evenly applied to the core layer.

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