JP2019504946A - Board for interior interior material, method for producing the same, and interior interior material using the board - Google Patents

Abstract

The present invention relates to a board for indoor interior materials, including a first dimension reinforcing layer, a core layer formed on the first dimension reinforcing layer, and a second dimension reinforcing layer formed on the core layer. Since foamed foam is used as the layer, there is an effect that it is excellent in cushioning properties and sound insulation properties, can absorb shocks, and can provide a board for indoor interior materials that is reduced in weight. Moreover, the board for indoor interior materials of the present invention uses foamed foam as the core layer, fiber nonwoven fabric as the first dimension reinforcing layer and the second dimension reinforcing layer, these are thermally laminated, and the lower part around the core layer and By producing the interior / interior material board having the first dimension reinforcement layer and the second dimension reinforcement layer formed thereon, there is an effect that the interior / interior material board excellent in water resistance and dimensional stability can be provided. .

Description

  The present invention relates to a new board that is environmentally friendly, excellent in cushioning and sound insulation properties, and can be reduced in weight while enhancing water resistance and dimensional stability, and an interior interior material using the board. About.

  Usually, as hard board materials used for indoor interior materials such as indoor floor materials and wall materials, plywood, HDF (High Density Fiberboard), MDF (Medium Density Fiberboard), inorganic board, fiber board, etc. is there. Each board has drawbacks. In the case of wood boards such as plywood, HDF, and MDF, the water resistance is poor, and in the case of inorganic boards, the specific gravity is high, so it is necessary to reduce the weight. In the case of a fiber board, dimension reinforcing fibers are mixed with a polymer binder at a constant weight, but in this case, processing of grooves that can fasten a board that has been processed to a certain size by means of burrs of the reinforcing fibers. There was a problem that was difficult.

  In order to solve the problems of each board as described above, Korean Patent Publication No. 10-2008-0092588 discloses that HDF or MDF is bonded to both sides of a Kenaf board, or both sides of HDF or MDF are bonded. Basic physical properties such as water resistance and dimensional stability are provided by providing a flooring in which a surface layer and a surface treatment layer are sequentially formed on a composite substrate formed by pressing or molding a kenaf board. The flooring which improved it is disclosed.

  However, the composite substrate disclosed in the prior art may have some improvement in dimensional stability compared to existing HDF or MDF, but by including HDF or MDF, the water resistance and dimensional stability are improved. The problem still exists. Moreover, since the composite base material is composed only of a hard board, there is a problem that the cushioning property and lightness of the flooring material are insufficient.

  Recently, as the quality of life has improved, there has been an increased interest in health-friendly and environmentally friendly products, and the noise level between apartments has risen as a social problem. Interior interior materials that can be used are required. As an example, indoor interior materials such as floor materials and wall materials, which are closely related to residential life, are gradually using a material that can give consideration to the environment and sound insulation performance.

  Therefore, in order to solve the shortcomings of existing wooden boards, the development of a new board that is environmentally friendly, excellent in cushioning and sound insulation, and capable of reducing weight while enhancing water resistance and dimensional stability, In addition, there is an urgent need for the development of interior materials using the same.

Korean Published Patent No. 10-2008-0092588

  In order to solve the above-mentioned problems, the present invention is a new board that is environmentally friendly, excellent in cushioning and sound insulation, and capable of realizing weight reduction, while enhancing water resistance and dimensional stability. It is an object of the present invention to provide a manufacturing method and an indoor interior material using the board.

  To achieve the above object, the present invention provides a first dimension reinforcing layer; a core layer formed on the first dimension reinforcing layer; and a second dimension reinforcing layer formed on the core layer. Provide board for interior and interior materials.

  Moreover, this invention provides the manufacturing method of the board for interior interior materials including the step which prepares foaming foam; and the step which heat laminates after positioning a fiber nonwoven fabric in the lower part and upper part of the said foaming foam.

  The present invention also provides an indoor interior material formed by adhering a surface material onto the indoor interior material board.

  Since the board for indoor interior materials of the present invention uses foamed foam as the core layer, it has excellent cushioning and sound insulation properties, can absorb shocks, and can provide a lightweight board for indoor interior materials. There is.

  Moreover, the board for indoor interior materials of the present invention uses foamed foam as the core layer, fiber nonwoven fabric as the first dimension reinforcing layer and the second dimension reinforcing layer, these are thermally laminated, and the lower part around the core layer and By producing the interior / interior material board having the first dimension reinforcement layer and the second dimension reinforcement layer formed thereon, there is an effect that the interior / interior material board excellent in water resistance and dimensional stability can be provided. .

  Moreover, the board for indoor interior materials of the present invention uses natural fibers as the reinforcing fibers in the fiber nonwoven fabric for forming the first dimension reinforcing layer and the second dimension reinforcing layer, and uses a polyolefin resin as the synthetic resin fiber. By doing so, there is an effect that it is possible to provide an environment-friendly board for indoor interior materials.

  In addition, the board for indoor interior material according to the present invention has a hard first dimension reinforcing layer and a second dimension reinforcing layer that are symmetrically positioned around a soft core layer, and a conventional fiber board cannot be realized. There is an effect that a Tongue & groove or a click structure can be formed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic sectional side view of 1st Example of the board for indoor interior materials of this invention. It is a schematic sectional side view of 2nd Example of the board for indoor interior materials of this invention. It is a schematic sectional side view of the interior interior material manufactured using the board for interior interior materials of FIG. It is a schematic sectional side view of the indoor interior material manufactured using the board for indoor interior materials of FIG. It is a figure which shows the general | schematic process of manufacturing the board for indoor interior materials using a double belt press apparatus. It is side sectional drawing which shows roughly the board for indoor interior materials of this invention in which the tongue-and-groove structure was formed. It is side sectional drawing which shows roughly the board for indoor interior materials of this invention in which the click structure was formed. It is a perspective view which shows a specific example of the board for indoor interior materials of this invention in which the click structure was formed. It is a sectional side view of the board for indoor interior materials of FIG. It is a figure which shows a fall collision stability test evaluation test apparatus.

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

  As shown in FIG. 1, the interior interior board 1 of the present invention includes a first dimension reinforcing layer 10; a core layer 30 formed on the first dimension reinforcing layer 10; and on the core layer 30. A second dimension reinforcing layer 50 formed.

  In the present invention, the first dimension reinforcing layer 10 and the second dimension reinforcing layer 50 are in the form of a board formed by thermocompression bonding a fiber nonwoven fabric, and the interior interior board 1 has water resistance and dimensional stability. It plays a role to ensure.

  The fiber nonwoven fabric is manufactured so as to include a synthetic resin fiber and a reinforcing fiber, so that when the thermocompression bonding with the core layer 30, the synthetic resin fiber in the fiber nonwoven fabric is melted and the core layer can be used without an additional adhesive. Can be bonded. The weight ratio of the synthetic resin fiber and the reinforcing fiber in the fiber nonwoven fabric is preferably 5: 5 to 7: 3. When the weight ratio of the reinforcing fibers exceeds 5, the tensile strength and bending strength are increased, but the weight of the synthetic resin fibers is relatively decreased, so that the nonwoven fabric is not formed well, and the formed nonwoven fabric is brittle (brittle). Therefore, it is not preferred, and when it is less than 3, it is not preferred because the tensile strength and bending strength are weak. In addition, when the weight ratio of the synthetic resin fiber exceeds 7, it is meaningless to manufacture a nonwoven fabric that is a porous material. When the weight ratio is less than 5, the nonwoven fabric is not formed well, so the synthetic resin fiber and the reinforcing fiber in the fiber nonwoven fabric are not formed. Is preferably 5: 5 to 7: 3.

  The synthetic resin fiber is a thermoplastic resin, and a polyolefin-based fiber that is an environmentally friendly material that does not emit a relatively harmful substance can be used.

  The polyolefin fibers are preferably polyethylene fibers, polypropylene fibers, or polyethylene terephthalate fibers. The polyolefin-based fiber may be a single-resin fiber or a core-shell structure fiber, and the core fiber and the coating resin forming the shell are manufactured using the same or different resins. It may be.

  As the reinforcing fiber, one or two or more selected from the group consisting of glass fiber, carbon fiber (aramid fiber), and natural fiber can be used. Preferably, natural fibers which are environmentally friendly and have a small dimensional change rate are preferably used alone.

  As the natural fiber, one or two or more selected from the group consisting of jute fiber, kenaf fiber, abaca fiber, coconut fiber, and wood fiber are mixed. Can be used.

  In the present invention, the fiber nonwoven fabric can be manufactured using a wet or dry manufacturing method, and preferably, a fiber manufactured using an airlaid process among dry manufacturing methods can be used.

The basis weight of the fibrous nonwoven fabric may be a 500~1,000g / ^{m 2,} preferably may be 500~800g / ^{m 2.} When the basis weight of the fiber nonwoven fabric is less than 500 g / m ² , the indentation strength is reduced. When the basis weight exceeds 1,000 g / m ² , the cushion effect is hindered and it is difficult to realize weight reduction. It is preferable to have.

  Moreover, although the thickness of the said fiber nonwoven fabric may be 5-15 mm and specific gravity may be 0.2-0.4, it is not restrict | limited to this range.

  In this invention, it is preferable that the thickness of the said 1st dimension reinforcement layer 10 and the 2nd dimension reinforcement layer 50 is 1-3 mm.

  The first dimension reinforcing layer 10 and the second dimension reinforcing layer 50 have the same thickness, or the difference in thickness between the first dimension reinforcing layer 10 and the second dimension reinforcing layer 50 is ± 0.3 mm or less. This is preferable because curling and the like can be prevented when the interior interior material using the interior interior material board 1 is exposed to a thermal environment such as heating in summer or winter.

  In the present invention, the core layer 30 is formed by thermocompression bonding of foamed foam. The interior interior board 1 has cushioning properties and sound insulation properties, absorbs impact, and realizes weight reduction of the board. To play a role.

  The foamed foam can be formed by foam molding with a composition containing polyethylene, polypropylene, polystyrene, polyvinyl chloride, or ethylene vinyl acetate resin, a foaming agent, and a foam stabilizer.

  Preferably, it is inexpensive to use ethylene vinyl acetate foam or polypropylene foam as the foamed foam, and it is easy to apply a tongue-and-groove process or a click process. Adhesion with the two-dimensional reinforcing layer 50 is easy, and it is suitable for embodying the physical properties of the board for indoor interior material 1, which is preferable.

  Or when the kind of resin of the said foaming foam differs from the synthetic resin (namely, synthetic resin fiber in a fiber nonwoven fabric) used for formation of the said 1st dimension reinforcement layer 10 and the 2nd dimension reinforcement layer 50, a core In order to enhance the adhesive force between the layer 30 and the first dimension reinforcing layer 10 and the second dimension reinforcing layer 50, the first adhesive layer 20 and the second adhesive layer 40 formed by a hot melt film or the like are further included. (See FIG. 2).

  The foamed foam preferably has a Shore D type hardness of 65 to 85 in order to exhibit cushioning properties. If it is less than 65, the foam may be excessively pressed in the double belt press-bonding process, and if it exceeds 85, the cushioning property becomes weak.

  The foamed foam may have a thickness of 3 to 7 mm, and the thickness of the core layer 30 formed by laminating the foamed foam with the dimension reinforcing layer and then thermally laminating the foamed foam is smaller than the initial thickness of the foamed foam. About 40 to 50% and may be 1.5 to 4.5 mm.

  As described above, the first dimension reinforcing layer 10; a core layer 30 formed on the first dimension reinforcing layer 10; and a second dimension reinforcing layer 50 formed on the core layer 30. Although the thickness of the board 1 for indoor interior materials of the invention may be 4 to 7 mm, the thickness can be appropriately changed according to the use application or the use environment.

  Moreover, the specific gravity of the board 1 for interior and interior materials of the present invention is about 0.5 to 0.7, such as a conventional plywood having the same thickness (specific gravity: 0.6 to 0.8), MDF and HDF. The weight was reduced compared to a wood board (specific gravity: 0.9 to 1.1) and an inorganic board (specific gravity: 1.1 to 2.0).

  It is preferable that the board | substrate 1 for indoor interior materials of this invention forms a tongue-and-groove structure or a click structure in a side surface so that it may have the fastening structure for making construction easy (refer FIG.6 and FIG.7). As shown in FIG. 6, when forming a tongue and groove structure, a groove (not shown) may be further formed on the lower surface of the interior / interior material board in order to facilitate adhesion to the floor surface. it can.

  A specific example of a board for indoor interior material in which a click structure is formed is shown in FIGS. FIG. 8 is a perspective view of a board for indoor interior material in which a click structure is formed, and FIG. 9 is a side sectional view thereof, which has excellent fastening strength in the longitudinal direction and the width direction without a separate adhesive. In order to have, the board for interior interior materials has a click structure including the protrusion part P and the groove part G 'which has a shape corresponding to this protrusion part.

  Since the board 1 for indoor interior materials of the present invention uses foamed foam as the core layer 30, the board for indoor interior materials can be provided with excellent cushioning and sound insulation, shock absorption, and reduced weight. There is an effect.

  Moreover, the board 1 for indoor interior materials of this invention uses foaming foam as the core layer 30, and uses a fiber nonwoven fabric as the 1st dimension reinforcement layer 10 and the 2nd dimension reinforcement layer 50, These are heat-laminated, The core layer 30 Board for interior and interior materials having a first dimension reinforcement layer 10 and a second dimension reinforcement layer 50 formed respectively on the lower and upper parts, with excellent water resistance and dimensional stability. The effect that can be provided.

  Moreover, the board 1 for indoor interior materials of this invention uses a natural fiber as a reinforcing fiber in the fiber nonwoven fabric for forming the 1st dimension reinforcement layer 10 and the 2nd dimension reinforcement layer 50, and uses a polyolefin-type as a synthetic resin fiber. By using resin, there is an effect that it is possible to provide a board for indoor interior materials that is environmentally friendly.

  In addition, the board 1 for interior and interior materials of the present invention has the hard first dimension reinforcing layer 10 and the second dimension reinforcing layer 50 symmetrically positioned around the core layer 30 made of a soft foam foam material. In addition, there is an effect that it is possible to form a tongue-and-groove or a click structure that cannot be realized by a conventional fiber board.

  The present invention relates to a method for manufacturing the board for indoor interior materials, specifically, a step of preparing foamed foam; a step of thermally laminating after placing a fiber nonwoven fabric on the lower and upper parts of the foamed foam; A board interior interior material board manufacturing method.

  Since the description regarding the foamed foam and fiber nonwoven fabric used in the production method of the present invention has been described above, repeated description is omitted.

  In the heat laminating step, the temperature condition of the heat laminating may be 200 to 250 ° C. If the temperature is lower than 200 ° C., the synthetic resin fibers in the fiber nonwoven fabric are not melted satisfactorily, so heat lamination with the foamed foam is not easy. If the temperature exceeds 250 ° C., the synthetic resin is excessively melted. Therefore, since it is difficult to control the thickness of the board, it is preferable to perform thermal lamination within the above temperature range.

  In the present invention, a double belt press apparatus can be used for the thermal laminating step (see FIG. 5).

  Alternatively, in the heat laminating step, a hot melt film can be further positioned between the foamed foam and the fiber nonwoven fabric, and then heat laminated. This is when the adhesive force is weak only by heat compression between the foamed foam and the fiber nonwoven fabric, that is, as an example, when the adhesive strength is weak due to the difference between the synthetic resin of the foamed foam and the synthetic resin fiber in the fiber nonwoven fabric. It is possible to heat laminate using a hot melt film as a medium. Alternatively, instead of the hot melt film, an adhesive may be applied to the upper and lower portions of the foamed foam, and then a fiber nonwoven fabric may be attached and thermally laminated.

  The method for manufacturing a board for interior and interior materials of the present invention can further facilitate fastening between a plurality of boards by further including a step of forming a tongue and groove on the side surface after the thermal laminating step (FIG. 6). reference).

  Alternatively, the method may further include a step of forming a click structure instead of the tongue and groove (see FIG. 7).

  Preferably, the step of forming the tongue-and-groove or the step of forming the click structure preferably comprises forming the tongue-and-groove structure or the click structure in a state in which the surface material is attached to the upper part of the interior interior board. It is preferable in terms of ease and process economy.

  The present invention provides a method for manufacturing the board for indoor interior material, in which, instead of the method of manufacturing the board for indoor interior material by thermally laminating foam foam and fiber nonwoven fabric, the fiber nonwoven fabric is thermocompression bonded. It can also be produced by bonding the molded fiber board and foamed foam with an adhesive. In this case, it is preferable to use a fiber board having a specific gravity of 0.4 to 0.7. On the other hand, it is preferable to adjust the thickness of the foamed foam so that the specific gravity of the board for indoor interior materials manufactured by such a method is about 0.5 to 0.7.

  The present invention relates to an indoor interior material using the indoor interior material board, and relates to an indoor interior material A formed by adhering a surface material 3 on the indoor interior material board 1 (see FIGS. 3 and 4). ).

  The indoor interior material A of the present invention may be a floor material or a wall material.

  The surface material 3 is a thermoplastic resin-based sheet such as polyethylene, polypropylene, or polyvinyl chloride, a thermosetting resin-based sheet such as HPM (high pressure melamine), a wood-based sheet such as wood or raw wood, or an inorganic material. It may be a system sheet.

  The thermoplastic resin-based sheet may be a non-foamed sheet or a foamed sheet.

  The surface material 3 may have a thickness of 0.2 to 2 mm.

  Since the surface material 3 is laminated with a film or paper on which a printing pattern is formed, an appearance and design effect excellent in aesthetics can be imparted.

  The adhesive used for adhering the surface material 3 on the interior / interior material board 1 can vary depending on the type of the surface material, and when using a thermoplastic resin sheet as the surface material, an olefin-based material is used. Adhesives such as hot melt, reactive polyurethane, and EVA hot melt can be used. When a thermosetting resin-based sheet such as HPM (high pressure melamin) is used, epoxy and polyurethane Alternatively, a melamine-based adhesive can be used, and when using a wood-based sheet such as a tree or a raw wood, a PVAc-based adhesive can be used.

  Optionally, in order to increase the adhesive strength with the surface material 3, the surface of the interior / interior material board 1 can be sanded before applying the adhesive.

  Further, when the surface material 3 is applied after the adhesive is applied to the indoor interior material board 1 and the third adhesive layer 2 is formed, the surface material 3 adhered to the upper part of the board 1 is used to improve the overall interior material. In this case, the entire bending balance can be maintained by forming a balance layer (not shown) by separately attaching a sheet to the lower portion of the board 1. be able to. Moreover, it is preferable to form the thickness of the balance layer in the same or similar thickness range as the surface material 3.

  The balance layer can use a thermoplastic resin made of the same material as the synthetic resin included in the first dimension reinforcing layer 10. In this case, the balance layer and the first dimension reinforcing layer 10 of the board 1 Adhesive force improves and durability of the interior interior material A can be improved.

  Hereinafter, preferred examples are presented to help understanding of the present invention. However, the following examples are merely illustrative of the present invention, and various changes and modifications are within the scope and technical idea of the present invention. It will be apparent to those skilled in the art that such changes and modifications fall within the scope of the appended claims.

[Example]
Example 1
Polypropylene fiber and Kenaf fiber were mixed at a weight ratio of 5: 5, and a fiber nonwoven fabric having a basis weight of 500 g / m ² , a thickness of 10 mm and a specific gravity of 0.3 was manufactured using a dry airlaid process. .

  Then, after the fiber nonwoven fabric produced was positioned on the lower and upper parts of EVA (Ethylene vinylate) foam having a Shore D hardness of 75 and a thickness of 5 mm, a double belt press apparatus was used at a temperature of 220 to 250 ° C. The board for indoor interior materials in which the first dimension reinforcing layer and the second dimension reinforcing layer were respectively formed on the lower part and the upper part of the core layer was manufactured by heat lamination.

Each of the first dimension reinforcing layer and the second dimension reinforcing layer has a thickness of 1 to 1.5 mm, and the core layer is pressure-bonded to a thickness of about 3 mm to have a total thickness of 6 mm and a basis weight of 1200. A board for indoor interior materials of ˜1500 g / m ² was produced.

Comparative Example 1
A commercially available pentapolymer plate (made in Malaysia) having a thickness of about 7 mm was prepared.

Experimental example 1
The water resistance and dimensional change rate of the board for indoor interior material of Example 1 and Comparative Example 1 were measured. The results are as shown in Tables 1 and 2 below.

  The results of the water resistance test shown in Table 1 are the results of measuring the change in thickness after the boards of Example 1 and Comparative Example 1 were immersed in water at room temperature for 24 hours. The dimensional change rate after the boards of Example 1 and Comparative Example 1 were left in an oven at 80 ° C. for 24 hours was measured.

  Table 1 shows the results of the water resistance test.

  Table 2 shows the test result of the dimensional change rate.

  As confirmed through the above test results, it was confirmed that the board for indoor interior materials of the present invention was very superior in water resistance and dimensional change compared to existing plywood boards.

Experimental example 2
Table 3 below shows test materials comparing the sound insulation performance of the board for interior and interior materials of Example 1 and Comparative Example 1. The sound insulation performance test was measured according to KS F 2810-1 (lightweight impact sound test conditions). The control group is intended for a floor in which no board is installed, and Comparative Example 1 is intended for a room in which the board for interior interior material of Comparative Example 1 is installed on the floor of the control group. The sound insulation performance compared with the control group was measured for the object in which the board for interior interior material of Example 1 was installed on the floor of the control group.

  As shown in Table 3, it can be confirmed that the interior / interior material board according to the present invention is superior in light impact noise reduction performance as compared with the plywood board of Comparative Example 1.

Experimental example 3
The falling collision stability test evaluation of the board for indoor interior materials of Example 1 and Comparative Example 1 was performed. The test was measured according to JIS A6519 (Head model test).

  The test method was to measure the maximum value of acceleration G after free fall of the head model (3.75 kg). First, the head model was fixed to the dropping device, the test piece was laid on the floor, and the thickness was 8 mm. After placing the rubber plate on top, the head model was dropped freely from a height of 20 cm, and the maximum value of acceleration G was measured (see FIG. 10).

  As shown in Table 4, since the board for indoor interior materials according to the present invention has a lower maximum G value than the plywood board of Comparative Example 1, it can be confirmed that the board has excellent cushioning properties. .

1: board for indoor interior material 10: first dimension reinforcing layer 20: first adhesive layer 30: core layer 40: second adhesive layer 50: second dimension reinforcing layer A: indoor interior material 2: third adhesive layer 3: Surface material T: Tonge
G: Groove
P: Projection G ': Groove

Claims (32)

A first dimension reinforcing layer;
A core layer formed on the first dimension reinforcing layer;
A board for indoor interior materials, comprising: a second dimension reinforcing layer formed on the core layer.   The board for interior and interior materials according to claim 1, wherein the first dimension reinforcing layer and the second dimension reinforcing layer are boards formed by thermocompression bonding of a fiber nonwoven fabric.   The board for indoor interior material according to claim 2, wherein the fiber nonwoven fabric includes synthetic resin fibers and reinforcing fibers.   The board for interior and interior materials according to claim 3, wherein a weight ratio of the synthetic resin fiber and the reinforcing fiber in the fiber nonwoven fabric is 5: 5 to 7: 3.   The board for indoor interior material according to claim 3, wherein the synthetic resin fiber is a polyolefin-based fiber.   The board for indoor interior material according to claim 5, wherein the polyolefin fiber is a polyethylene fiber, a polypropylene fiber, or a polyethylene terephthalate fiber.   The board for indoor interior materials according to claim 3, wherein the reinforcing fiber is a mixture of one or two or more selected from the group consisting of glass fiber, carbon fiber, and natural fiber. .   The natural fiber is a mixture of any one or two or more selected from the group consisting of jute fiber, kenaf fiber, abaca fiber, coconut fiber, and wood fiber. The board for indoor interior material according to claim 7, wherein: The board for indoor interior materials according to claim 2, wherein the basis weight of the fiber nonwoven fabric is 500 to 1,000 g / m ² .   The board for interior and interior materials according to claim 2, wherein the fiber nonwoven fabric has a thickness of 5 to 15 mm.   The board for indoor interior materials according to claim 2, wherein the specific gravity of the fiber nonwoven fabric is 0.2 to 0.4.   The board for interior and interior materials according to claim 1, wherein the thickness of the first dimension reinforcing layer and the second dimension reinforcing layer is 1 to 3 mm.   The indoor interior according to claim 1, wherein the first dimension reinforcing layer and the second dimension reinforcing layer have the same thickness, or the difference in thickness is ± 0.3 mm or less. Board for wood.   The board for indoor interior material according to claim 1, wherein the core layer is formed by thermocompression bonding of foamed foam.   The board for indoor interior material according to claim 14, wherein the foamed foam is polyethylene, polypropylene, polystyrene, polyvinyl chloride, or ethylene vinyl acetate foam.   The first adhesive layer is further formed between the core layer and the first dimension reinforcing layer, and the second adhesive layer is further formed between the core layer and the second dimension reinforcing layer. The board for indoor interior materials described in 1.   The board for indoor interior material according to claim 16, wherein the first adhesive layer and the second adhesive layer are formed of a hot melt film.   The board for interior and interior materials according to claim 14, wherein the foamed foam has a Shore D type hardness of 65 to 85.   The board for indoor interior material according to claim 14, wherein the foamed foam has a thickness of 3 to 7 mm.   The board for indoor interior material according to claim 1, wherein the thickness of the board for indoor interior material is 4 to 7 mm.   The board for indoor interior material according to claim 1, wherein the specific gravity of the board for indoor interior material is 0.5 to 0.7.   The board for indoor interior material according to claim 1, wherein the board for indoor interior material is formed with a tongue and groove structure or a click structure. Preparing a foam foam; and
And a step of heat laminating a fiber nonwoven fabric on the lower and upper portions of the foamed foam.   The method for manufacturing a board for indoor interior material according to claim 23, wherein, in the thermal laminating step, the temperature of the thermal laminating is 200 to 250 ° C.   The method for manufacturing a board for interior and interior materials according to claim 23, wherein in the thermal laminating step, the thermal laminating is performed by using a double belt press apparatus.   24. The method for manufacturing a board for interior and interior materials according to claim 23, wherein, in the thermal laminating step, thermal lamination is performed after a hot melt film is further positioned between the foamed foam and the fiber nonwoven fabric.   24. The method for manufacturing a board for indoor interior material according to claim 23, further comprising the step of forming tongues and grooves on a side surface after the heat laminating step.   The method for manufacturing a board for indoor interior material according to claim 23, further comprising the step of forming a click structure after the thermal laminating step.   An interior decoration material, wherein a surface material is attached to the upper surface of the interior interior material board according to any one of claims 1 to 22.   30. The interior / interior material according to claim 29, wherein the surface material is a thermoplastic resin sheet, a thermosetting resin sheet, or a wood sheet.   30. The indoor interior material according to claim 29, wherein the indoor interior material board and the surface material are bonded together with an adhesive.   30. The indoor interior material according to claim 29, further comprising a balance layer formed on a lower surface of the indoor interior material board.