JP6776358B2 - Boards for interior interior materials, methods for manufacturing them, and interior interior materials using the boards. - Google Patents

Description

The present invention is a new board and a manufacturing method thereof that are environmentally friendly, have excellent cushioning and sound insulation properties, and can realize weight reduction while enhancing water resistance and dimensional stability, and an interior interior material using the board. Regarding.

Hardboard materials usually used for interior interior materials such as interior flooring and wall materials include plywood, HDF (High Density Fiberboard), MDF (Medium Density Fiberboard), inorganic boards, and fiberboards. is there. Each board has drawbacks, and in the case of wood-based boards such as plywood, HDF, and MDF, 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 fiber boards, dimensional reinforcing fibers are mixed with a polymer binder at a constant weight, but in this case, the burrs of the reinforcing fibers are used to process grooves that can fasten boards processed to a certain size. There was a problem that it was difficult.

In order to solve the problems of each board as described above, the Republic of Korea Patent Publication No. 10-2008-0092588 has HDF or MDF adhered to both sides of the Kenaf board, or both sides of the HDF or MDF. By providing a flooring material in which a surface layer and a surface treatment layer are sequentially formed on a composite base material formed by press molding after adhering a kenaf board, basic physical properties such as water resistance and dimensional stability are provided. We disclose flooring materials that are designed to improve.

However, the composite substrate disclosed in the prior art may have some improvements in dimensional stability as compared with the existing HDF or MDF, but by including HDF or MDF, the water resistance and dimensional stability are improved. The problem still exists. Further, since the composite base material is composed of only a hard board, there is a problem that the cushioning property and the light weight of the floor material are insufficient.

In addition, as the quality of life has improved recently, interest in environmentally friendly products as well as health has increased, and the noise problem between layers of condominiums has emerged as a social problem to minimize the noise between layers. Interior interior materials that can be converted are required. As an example, indoor interior materials such as flooring materials and wall materials, which are closely related to living life, tend to use materials that can gradually give consideration to the environment and sound insulation performance.

Therefore, in order to solve the drawbacks of existing wood-based boards, we have developed a new board that is environmentally friendly, has excellent cushioning and sound insulation, and can achieve weight reduction while enhancing water resistance and dimensional stability. And the development of interior interior materials using it is urgently required.

Korean Publication No. 10-2008-0092588 Gazette

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

In order to achieve the above object, the present invention comprises 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 boards for interior interior materials, including.

The present invention also provides a method for manufacturing a board for an interior interior material, which comprises a step of preparing a foam foam; a step of locating a fibrous nonwoven fabric on the lower and upper portions of the foam foam and then heat laminating the foam.

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

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

Further, in the board for interior interior material of the present invention, foam foam is used as a core layer, and a fibrous non-woven fabric is used as a first dimension reinforcing layer and a second dimension reinforcing layer, and these are thermally laminated to form a lower portion centering on the core layer. By manufacturing a board for an interior interior material in which a first dimension reinforcing layer and a second dimension reinforcing layer are formed respectively on the upper portion, there is an effect that a board for an interior interior material having excellent water resistance and dimensional stability can be provided. ..

Further, the board for interior interior material of the present invention uses natural fibers as reinforcing fibers in the fiber non-woven 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 an environment-friendly board for interior interior materials can be provided.

Further, in the board for interior interior material of the present invention, the hard first dimension reinforcing layer and the second dimension reinforcing layer are symmetrically located around the soft core layer, and the conventional fiber board cannot be realized. It has the effect of being able to form a symmetry & groove or click structure.

It is the schematic side sectional view of the 1st Example of the board for interior interior material of this invention. It is the schematic side sectional view of the 2nd Example of the board for interior interior material of this invention. It is a schematic side sectional view of the interior interior material manufactured by using the board for interior interior material of FIG. It is a schematic side sectional view of the interior interior material manufactured by using the board for interior interior material of FIG. It is a figure which shows the schematic process of manufacturing the board for interior interior material using a double belt press apparatus. It is a side sectional view schematically showing the board for interior interior material of this invention which formed the tongue-and-groove structure. It is a side sectional view schematically showing the board for interior interior material of this invention which formed the click structure. It is a perspective view which shows a specific example of the board for the interior interior material of this invention which formed the click structure. It is a side sectional view of the board for interior interior material of FIG. It is a figure which shows the fall collision stability test evaluation test apparatus.

Hereinafter, the present invention will be specifically described together with the accompanying drawings.

As shown in FIG. 1, the board 1 for an interior interior material of the present invention has a first dimension reinforcing layer 10; a core layer 30 formed on the first dimension reinforcing layer 10; and a core layer 30 formed on the first dimension reinforcing layer 10. Includes the formed second dimension reinforcing layer 50 and;

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 fibrous non-woven fabric, and the board 1 for an interior interior material has water resistance and dimensional stability. It plays a role in ensuring that it can be secured.

By manufacturing the fibrous nonwoven fabric so as to contain synthetic resin fibers and reinforcing fibers, the synthetic resin fibers in the fibrous nonwoven fabric are melted during thermal pressure bonding with the core layer 30 to form a core layer without a separate adhesive. Can be bonded. The weight ratio of the synthetic resin fiber to the reinforcing fiber in the fibrous 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 high, but the weight of the synthetic resin fibers is relatively low, so that the non-woven fabric is not formed well and the formed non-woven fabric is brittle. ) Therefore, it is not preferable, and if it is less than 3, the tensile strength and bending strength are weak, which is not preferable. Further, when the weight ratio of the synthetic resin fiber exceeds 7, there is no point in producing the non-woven fabric which is a porous material, and when it is less than 5, the non-woven fabric is not formed well, so that the synthetic resin fiber and the reinforcing fiber in the fibrous non-woven fabric are not formed. The weight ratio with and is preferably 5: 5 to 7: 3.

As the synthetic resin fiber, a polyolefin-based fiber which is a thermoplastic resin and is an environment-friendly material that does not release relatively harmful substances can be used.

As the polyolefin fiber, it is preferable to use polyethylene fiber, polypropylene fiber, or polyethylene terephthalate fiber. The polyolefin-based fiber may be a single resin fiber, or is a fiber having a core-shell structure, in which the core fiber and the shell coating resin are produced by 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 mixed and used. Preferably, natural fibers that are environmentally friendly and have a small dimensional change rate are used alone.

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

In the present invention, the fibrous nonwoven fabric can be produced by using a wet or dry production method, and preferably, among the dry production methods, those produced by using the airlaid step 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.} If the basis weight of the fibrous nonwoven fabric is less than 500 g / m ² , the pushing strength is lowered, and if it exceeds 1,000 g / m ² , the cushioning effect is hindered and it is difficult to realize weight reduction. Therefore, the basis weight within the above range. It is preferable to have.

The thickness of the fibrous nonwoven fabric may be 5 to 15 mm, and the specific gravity may be 0.2 to 0.4, but the thickness is not limited to this range.

In the present invention, the thickness of the first dimension reinforcing layer 10 and the second dimension reinforcing layer 50 is preferably 1 to 3 mm.

Further, 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 foam, and the board 1 for interior interior material has cushioning property and sound insulation property, absorbs impact, and realizes weight reduction of the board. Play a role in doing so.

The foam 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 for the foam, which is easy to be torn or clicked, and the first dimensional reinforcing layer 10 and the first without a separate adhesive. It is preferable because it is easy to adhere to the two-dimensional reinforcing layer 50 and is suitable for embodying the physical properties of the interior interior material board 1.

Alternatively, when the type of the foamed resin and the synthetic resin used for forming the first dimension reinforcing layer 10 and the second dimension reinforcing layer 50 (that is, the synthetic resin fiber in the fibrous nonwoven fabric) are different, the core A first adhesive layer 20 and a second adhesive layer 40 formed of a hot melt film or the like are further included for strengthening the adhesive force between the layer 30 and the first dimension reinforcing layer 10 and the second dimension reinforcing layer 50. Can be done (see Figure 2).

The hardness of the foam foam is preferably 65 to 85 in Shore D type hardness in order to exhibit cushioning properties. If it is less than 65, the foam may be pressed excessively in the double belt press crimping process, and if it exceeds 85, the cushioning property is weakened. Therefore, it is preferable to have a hardness within the above range.

The thickness of the foam may be 3 to 7 mm, and the thickness of the core layer 30 formed by laminating the foam with the dimensional reinforcement layer and then heat-laminating the foam is with respect to the initial thickness of the foam. It can be about 40-50% crimped to 1.5-4.5 mm.

As described above, the present invention including the first dimension reinforcing layer 10; the core layer 30 formed on the first dimension reinforcing layer 10; and the second dimension reinforcing layer 50 formed on the core layer 30; The thickness of the board 1 for interior interior material of the present invention may be 4 to 7 mm, but the thickness can be appropriately changed depending on the intended use and the environment of use.

Further, the specific gravity of the board 1 for interior interior material of the present invention is about 0.5 to 0.7, which is similar to that of conventional plywood (specific gravity: 0.6 to 0.8), MDF and HDF having the same thickness. It is lighter than wood-based boards (specific gravity: 0.9 to 1.1) and inorganic boards (specific gravity: 1.1 to 2.0).

It is preferable that the board 1 for interior interior material of the present invention has a tongue-and-groove structure or a click structure formed on the side surface so as to have a fastening structure for facilitating construction (see FIGS. 6 and 7). As shown in FIG. 6, when forming a tongue 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 the board for the interior interior material in which the click structure is formed is shown in FIGS. 8 and 9. FIG. 8 is a perspective view of a board for interior interior material in which a click structure is formed, and FIG. 9 is a side sectional view thereof, which provides excellent fastening strength in the longitudinal direction and the width direction without a separate adhesive. To have, the interior interior material board has a click structure including a protrusion P and a groove G'having a shape corresponding to the protrusion.

Since the board 1 for interior interior materials of the present invention uses foam as the core layer 30, it is possible to provide a board for interior interior materials that is excellent in cushioning and sound insulation, can absorb shocks, and is lightweight. There is an effect.

Further, in the interior interior material board 1 of the present invention, foam foam is used as the core layer 30, fiber non-woven fabric is used as the first dimension reinforcing layer 10 and the second dimension reinforcing layer 50, and these are thermally laminated to form the core layer 30. A board for interior interior materials having excellent water resistance and dimensional stability by manufacturing a board for interior interior materials in which a first dimension reinforcing layer 10 and a second dimension reinforcing layer 50 are formed at the lower part and the upper part, respectively. Has the effect of being able to provide.

Further, the board 1 for interior interior material of the present invention uses natural fibers as reinforcing fibers in the fiber non-woven fabric for forming the first dimension reinforcing layer 10 and the second dimension reinforcing layer 50, and is a polyolefin-based synthetic resin fiber. The use of resin has the effect of providing an environment-friendly board for interior interior materials.

Further, in the interior interior material board 1 of the present invention, the hard first dimension reinforcing layer 10 and the second dimension reinforcing layer 50 are symmetrically positioned around the core layer 30 made of a soft foam foam material. There is an effect that it is possible to form a tongue or click structure that cannot be realized by a conventional fiber board.

The present invention relates to the method for manufacturing a board for an interior interior material, specifically, a step of preparing a foam foam; a step of locating a fibrous nonwoven fabric on the lower and upper portions of the foam foam, and then heat laminating. The present invention relates to a method for manufacturing a board for interior interior materials including.

Since the description of the foamed foam and the fibrous nonwoven fabric used in the production method of the present invention has been described above, duplicate description will be omitted.

Further, in the step of heat laminating, the temperature condition of the heat laminating can be 200 to 250 ° C. If the temperature is lower than 200 ° C, the synthetic resin fibers in the fibrous nonwoven fabric are not melted well, so that thermal lamination with the foam is not easy. If the temperature exceeds 250 ° C, the synthetic resin is excessively melted. Since it is difficult to control the thickness of the board, it is preferable to perform thermal laminating within the above temperature range.

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

Alternatively, in the heat laminating step, the hot melt film may be further positioned between the foam and the fibrous nonwoven fabric, and then heat laminating may be performed. This is the case where the adhesive strength is weak between the foamed foam and the fibrous nonwoven fabric only by heat-bonding, that is, for example, the adhesive strength is weak due to the difference in the material of the synthetic resin of the foamed foam and the synthetic resin fiber in the fibrous nonwoven fabric. , Can be heat-laminated via a hot melt film. Alternatively, optionally, instead of the hot melt film, an adhesive may be applied to the upper and lower parts of the foam, and then a fibrous nonwoven fabric may be attached and heat-laminated.

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

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

The step of forming the tongue or the click structure is preferably formed by forming the tongue structure or the click structure with the surface material attached to the upper part of the board for the interior interior material. It is preferable in terms of ease and process economy.

In the present invention, in the method for manufacturing a board for interior interior materials, instead of the method for manufacturing a board for interior interior materials by selectively heat-laminating foam foam and fibrous nonwoven fabric, the fibrous nonwoven fabric is heat-bonded. It can also be manufactured by adhering a molded fiber board and foam 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 foam so that the specific gravity of the board for interior interior material produced by such a method is about 0.5 to 0.7.

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

The interior 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 warp 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 thickness of the surface material 3 may be 0.2 to 2 mm.

Since a film or paper on which a print pattern is formed is bonded to the surface material 3, it is possible to impart an aesthetically pleasing appearance and design effect.

The adhesive used to attach the surface material 3 onto the indoor interior material board 1 may differ depending on the type of the surface material, and when a thermoplastic resin-based sheet is used as the surface material, it is olefin-based. Adhesives such as hot melt, reactive polyurethane, EVA hot melt can be used, and when a thermosetting resin sheet such as HPM (high pressure melamine) is used, epoxy or polyurethane is used. Alternatively, a melamine-based adhesive can be used, and when a wood-based sheet such as warp wood or raw wood is used, a PVAc-based adhesive can be used.

Optionally, the surface of the interior interior material board 1 can be sanded before the adhesive is applied in order to increase the adhesive force with the surface material 3.

Further, when an adhesive is applied onto the interior interior material board 1 to attach the surface material 3 after the formation of the third adhesive layer 2, the surface material 3 attached to the upper part of the board 1 causes the entire interior material to adhere. In this case, a sheet is separately attached to the lower part of the board 1 to form a balance layer (not shown) so that the overall bending balance can be maintained. be able to. Further, the thickness of the balance layer is preferably formed in the range of the same or similar thickness as the surface material 3.

As the balance layer, a thermoplastic resin of the same material as the synthetic resin contained in the first dimension reinforcing layer 10 can be used. In this case, the balance layer and the first dimension reinforcing layer 10 of the board 1 are combined. The adhesive strength is improved, and the durability of the interior interior material A can be improved.

Hereinafter, preferred examples will be presented to aid the understanding of the present invention, but the following examples merely illustrate the present invention, and various changes and modifications are made within the scope of the present invention and technical ideas. It is clear to those skilled in the art that such changes and amendments fall within the scope of the appended claims.

[Example]
Example 1
Polypropylene fibers and kenaf fibers were mixed in a weight ratio of 5: 5 to produce a fibrous nonwoven fabric having a basis weight of 500 g / m ² , a thickness of 10 mm, and a specific gravity of 0.3 using a dry airlaid process. ..

Then, after locating the produced fibrous non-woven fabric on the lower and upper parts of EVA (ethylene vinyl acetate) foam having a shore D hardness of 75 and a thickness of 5 mm, at a temperature of 220 to 250 ° C. using a double belt press device. By heat laminating, a board for an interior interior material was produced in which a first dimension reinforcing layer and a second dimension reinforcing layer were formed at the lower and upper parts of the core layer, respectively.

The thicknesses of the first dimension reinforcing layer and the second dimension reinforcing layer are 1 to 1.5 mm, respectively, and the core layer is crimped to a thickness of about 3 mm to a total thickness of 6 mm and a basis weight of 1200. Boards for interior interior materials of ~ 1500 g / m ² were manufactured.

Comparative Example 1
A commercially available 5-layer plywood (made in Malaysia) having a thickness of about 7 mm was prepared.

Experimental Example 1
The water resistance and dimensional change rate of the boards for interior interior materials of Example 1 and Comparative Example 1 were measured. The results are shown in Tables 1 and 2 below.

The results of the water resistance test in Table 1 are the results of measuring the change in thickness after immersing the boards of Example 1 and Comparative Example 1 in water at room temperature for 24 hours, and the dimensional change rate in Table 2 is carried out. 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 results of the dimensional change rate.

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

Experimental Example 2
Table 3 below shows test materials comparing the sound insulation performance of the boards for interior 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 floor in which the board for interior interior material of Comparative Example 1 is installed on the floor of the control group, and Example 1 Measured the sound insulation performance as compared with the control group in the case where the board for the 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 board for interior interior material according to the present invention is superior in the light weight impact noise reduction performance as compared with the plywood board of Comparative Example 1.

Experimental Example 3
The fall collision stability test evaluation of the boards for interior interior materials of Example 1 and Comparative Example 1 was performed. The test was measured according to JIS A 6519 (Head model test).

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

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

1: Board for interior interior material 10: First dimension reinforcing layer 20: First adhesive layer 30: Core layer 40: Second adhesive layer 50: Second dimension reinforcing layer A: Interior interior material 2: Third adhesive layer 3: Surface material T: Tongue
G: Groove
P: Protruding part G': Groove part

Claims (17)

1st dimension reinforcement layer and
The core layer formed on the first dimension reinforcing layer and
A board for interior interior materials, which includes a second dimension reinforcing layer formed on the core layer.
The first dimension reinforcing layer and the second dimension reinforcing layer are boards formed by thermocompression bonding a fibrous nonwoven fabric containing synthetic resin fibers and reinforcing fibers.
The weight ratio of the synthetic resin fiber to the reinforcing fiber in the fibrous nonwoven fabric is 5: 5 to 7: 3.
The basis weight of the fibrous nonwoven fabric is 500 to 800 g / m ² , the thickness of the fibrous nonwoven fabric is 5 to 15 mm, and the specific gravity of the fibrous nonwoven fabric is 0.2 to 0.4.
The thickness of the first dimension reinforcing layer and the second dimension reinforcing layer is 1 to 3 mm.
The thickness of the core layer is 1.5 to 4.5 mm, the core layer, heat expanded foam Shore D (Shore D type) hardness 65-85 der Li Kui thickness of 3~7mm It is formed by crimping
The specific gravity of the board for interior interior material is 0.5 to 0.7.
The interior interior material board is used as a flooring material to form a tongue & groove structure or a click structure .
The thickness of the board for interior interior material is 4 to 7 mm.
A board for an interior interior material, which is characterized in that the water resistance is 1.3% as a result of measuring a change in thickness after immersing the board in water at room temperature for 24 hours . The board for an interior interior material according to claim 1, wherein the synthetic resin fiber is a polyolefin fiber. The board for an interior interior material according to claim 2, wherein the polyolefin fiber is a polyethylene fiber, a polypropylene fiber, or a polyethylene terephthalate fiber. The board for an interior interior material according to claim 1, 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 composed of jute fiber, kenaf fiber, abaca fiber, coconut fiber, and wood fiber. The board for interior interior material according to claim 4, wherein the board is characterized by the above. The interior 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. Material board. The board for an interior interior material according to claim 1, wherein the foam foam is polyethylene, polypropylene, polystyrene, polyvinyl chloride, or ethylene vinyl acetate foam. Claim 1 is characterized in that a first adhesive layer is further formed between the core layer and the first dimensional reinforcing layer, and a second adhesive layer is further formed between the core layer and the second dimensional reinforcing layer. Board for interior interior materials described in. The board for an interior interior material according to claim 8, wherein the first adhesive layer and the second adhesive layer are formed of a hot melt film. A step of Shore D (Shore D type) hardness 65-85 der Li Kui thickness is prepared expanded foam is 3 to 7 mm,
A method for manufacturing a board for an interior interior material, which comprises a step of locating a fibrous nonwoven fabric containing synthetic resin fibers and reinforcing fibers on the lower and upper portions of the foam, and then heat laminating.
The weight ratio of the synthetic resin fiber to the reinforcing fiber in the fibrous nonwoven fabric is 5: 5 to 7: 3.
The basis weight of the fibrous nonwoven fabric is 500 to 800 g / m ² , the thickness of the fibrous nonwoven fabric is 5 to 15 mm, and the specific gravity of the fibrous nonwoven fabric is 0.2 to 0.4.
The specific gravity of the board for interior interior material is 0.5 to 0.7.
The interior interior material board is used as a floor material,
An additional step of forming a tongue & groove on the side surface after the heat laminating step is included.
A step of forming a click structure is further included after the heat laminating step.
The thickness of the core layer prepared by the thermal lamination of the foam foam is 1.5-4.5 mm.
The thickness of the board for interior interior material is 4 to 7 mm.
A method for manufacturing a board for an interior interior material, which comprises 1.3% water resistance as a result of measuring a change in thickness after immersing the board in water at room temperature for 24 hours . The method for manufacturing a board for an interior interior material according to claim 10 , wherein in the step of heat laminating, the temperature of the heat laminating is 200 to 250 ° C. The method for manufacturing an interior interior material board according to claim 10 , wherein in the step of heat laminating, the heat laminating is performed using a double belt press device. The method for manufacturing a board for an interior interior material according to claim 10 , wherein in the step of heat laminating, a hot melt film is further positioned between the foam and the fibrous nonwoven fabric and then heat laminated. An interior interior material in which a surface material is adhered to the upper surface of the interior interior material board according to any one of claims 1 to 9 . The interior interior material according to claim 14 , wherein the surface material is a thermoplastic resin sheet, a thermosetting resin sheet, or a wood sheet. The interior interior material according to claim 14 , wherein the board for the interior interior material and the surface material are bonded to each other by an adhesive. The interior interior material according to claim 14 , wherein a balance layer is further formed on the lower surface of the interior interior material board.