JP5322734B2 - Floor heating floor material and manufacturing method thereof - Google Patents

Description

  The present invention is a flooring material for floor heating that is less warped and twisted even when it can be used as a flooring material for floor heating or direct application, especially in a decorative material using a low-moisture content wood fiber board as a base material. And a method for manufacturing a flooring for floor heating.

  Conventionally, as a method for producing a composite board in which a plywood and a wood fiber board such as MDF are combined, methods shown in Patent Document 1 and Patent Document 2 are known. Patent Document 1 describes a method of manufacturing a composite board with low warpage and good production efficiency by combining a low moisture content MDF and a plywood board.

In Patent Document 2, a decorative sheet is attached to the surface of the base material, and a backing sheet made of water-resistant paper or water-resistant resin is attached to the back surface of the base material. A floor decorative material in which a water-resistant resin layer is formed is described.
JP-A-10-151603 JP 2006-97321 A

  However, in the invention shown in Patent Document 1, no consideration is given to deformation due to use of the composite plate after manufacture. Therefore, when a decorative board that is flattened by this method is manufactured, especially when the moisture content of the MDF immediately after production is low and the moisture content of the plywood is high, the moisture from the plywood substrate is MDF due to subsequent use over time. Therefore, there is a problem that the MDF absorbs moisture and linearly expands, and the composite plate becomes a ridge warp with the surface side as a convex surface.

  On the other hand, in the thing of patent document 2, it considers the deformation | transformation by the moisture from the outside by the use after manufacture, and it is hard to be influenced with respect to the moisture from an external environment. However, like the invention of Patent Document 1, when a composite substrate is used, particularly when the moisture content of MDF immediately after production is low (7% or less) and the moisture content of plywood is high (for example, about 15%), As the water content of the plywood substrate shifts to MDF with use over time, there is a problem that MDF absorbs moisture and linearly expands, resulting in a warp with a convex surface on the surface side.

  The purpose of the present invention is to transfer moisture from the plywood to the wood fiber board not only when the plywood and the wood fiber board having different moisture contents are used, but also during the production, as well as over time after use. In addition, the present invention is intended to obtain a floor heating floor material excellent in application to floor heating with less thermal deformation due to heat when using floor heating and a method for manufacturing the floor heating floor material.

  In order to achieve the above object, in the present invention, a moisture-proof layer is formed between the wood fiberboard layer and the plywood substrate. The water content referred to in the present invention is an absolute dry water content based on the absolute dry weight.

  Specifically, the invention of claim 1 is directed to a floor heating floor material in which a moisture-proof layer, a wood fiberboard layer, and a moisture-proof surface decorative layer are laminated and integrated in order on a plywood substrate. It is.

And the said moisture-proof layer shall be 0.01 mm or more and less than 0.08 mm, and shall have the moisture-proof performance of 30 g / m < ² > * 24h or less by a moisture-permeable measurement. Further, the wood fiber board layer has a moisture content of 7% or less, and the surface decorative layer has a moisture-proof performance of 30 g / m ² · 24 h or less as measured by moisture permeability.

  In the first aspect of the invention, the wood fiberboard layer is laminated and integrated on the plywood substrate in the flooring material for floor heating via the moisture-proof layer. Although the moisture content is 7% or less, which is lower than the plywood base material, the moisture content of the plywood base material is transferred to the wood fiberboard layer by the moisture-proof layer. In addition to the manufacturing process, the wood fiber board layer is prevented from being linearly expanded due to moisture absorption and causing a warp having a convex surface on the surface side.

Moreover, the moisture-proof layer has a thickness of 0.01 mm or more and less than 0.08 mm, and has a moisture-proof performance of 30 g / m ² · 24 h or less according to moisture permeability measurement. The moisture-proof defect of the moisture-proof layer is low due to the pressure when laminating and integrating the plywood base material and the wood fiber board layer, and it was used as a flooring for floor heating. Sometimes, the moisture-proof layer itself can be prevented from thermally expanding, and the occurrence of warping of the flooring can be more effectively prevented.

Further, the surface decorative layer formed on the wood fiber board layer also has a moisture-proof performance of 30 g / m ² · 24 h or less by moisture permeability measurement. Is also blocked from entering (intruding), and it is possible to more effectively prevent the wood fiberboard layer of the floor heating floor material from linearly expanding due to moisture absorption and causing warpage.

  In the invention of claim 2, in the floor heating material of claim 1, the moisture-proof layer and the wood fiber board layer, and the wood fiber board layer and the surface decorative layer are each laminated and integrated with a non-aqueous adhesive. It is characterized by that.

  In this invention of claim 2, since the surface decorative layer and the moisture-proof layer formed respectively on the front and back sides of the wood fiber board layer are both laminated and integrated through a non-aqueous adhesive, the wood fiber is used by these adhesives. It is possible to prevent the moisture content of the board layer from increasing.

  According to a third aspect of the present invention, in the floor heating material according to the first or second aspect, at least one of groove processing and actual processing is performed so that the wood fiberboard layer is exposed on the end face, and the exposed wooden material The exposed surface of the fiberboard layer is covered with a moisture-proof coating.

  In this invention of claim 3, even if the groove processing or actual processing is performed and the wood fiberboard layer is exposed, the exposed surface is moisture-proof coated, so that moisture is transferred from the exposed surface to the wood fiberboard layer ( Intrusion) can be prevented by the moisture-proof coating film.

  The invention of Claims 4-12 concerns on the manufacturing method of the flooring for floor heating. In each manufacturing method, for convenience, the “surface” of the wood fiber board, moisture-proof sheet, and decorative sheet is the front surface of the manufactured decorative board, and “back surface” is the back side of the decorative board. Each surface is shown. The same applies to “front side” and “back side”, and the front and back sides and front and back sides of each member are not specified.

According to a fourth aspect of the present invention, there is provided a method for manufacturing a flooring material for floor heating, comprising a moisture content of 30 g / m ² · 24 h or less on a surface of a wood fiberboard having a moisture content of 7% or less. After placing the sheet via an adhesive and placing the decorative sheet on the surface-side moisture-proof sheet via the adhesive, the surface-side moisture-proof sheet and the decorative sheet are made of the wood fiber board by hot pressing. Laminate and integrate on the surface.

Next, an adhesive is applied to the back side moisture-proof sheet having a thickness of 0.01 mm or more and less than 0.08 mm and having a moisture permeability of 30 g / m ² · 24 h or less by moisture permeability measurement on the back surface of the wood fiber board. And laminated and integrated.

  Then, the decorative sheet, the front-side moisture-proof sheet, and the back-side moisture-proof sheet and the wood fiber board integrated with the back-side moisture-proof sheet are laminated and integrated on the plywood substrate via an adhesive to obtain an integrated substrate.

Furthermore, by coating the surface of the decorative sheet in the integrated base material to form a surface decorative layer comprising the coating layer, the decorative sheet, and the surface-side moisture-proof sheet, the transparent substrate is formed on the plywood base material. surface decorative having a moisture barrier layer having the following moisture barrier quality 30g ^/ m 2 · 24h with humidity measurement, and the moisture content of 7% or less of wood fiber board layer, the moisture resistance of less than 30g ^/ m 2 · 24h by moisture permeability measured It is characterized by obtaining a floor heating material in which layers are laminated and integrated in order.

  In the invention of claim 4, first, the surface-side moisture-proof sheet is placed on the surface of the wood fiber board via an adhesive, and the decorative sheet is placed on the surface-side moisture-proof sheet via the adhesive. Thereafter, the surface-side moisture-proof sheet and the decorative sheet are laminated and integrated on the surface of the wood fiber board by hot pressing, and then the back-side moisture-proof sheet is laminated and integrated on the back surface of the wood fiber board via an adhesive. After that, the wood fiber board is laminated and integrated with the plywood base material via an adhesive in the back-side moisture-proof sheet to become an integrated base material, and the decorative sheet surface of the integrated base material is painted, and the coating is applied. A surface decorative layer comprising a film layer, a decorative sheet, and a surface-side moisture-proof sheet is formed. Thereby, the flooring for floor heating according to the invention of claim 1 can be manufactured satisfactorily.

  In addition, since the front-side moisture-proof sheet and the decorative sheet can be integrated by a single hot press, the floor heating flooring material with a decorative sheet finish can be manufactured with high productivity.

The manufacturing method of the flooring for floor heating which concerns on invention of Claim 5 has a moisture content of 30 g / m < ² > 24h or less by the moisture permeability measurement on the surface of the wood fiber board whose moisture content is 7% or less After the sheets are laminated and integrated via an adhesive, the decorative sheet is laminated and integrated on the surface of the surface-side moisture-proof sheet via an adhesive by hot pressing.

Next, an adhesive is applied to the back side moisture-proof sheet having a thickness of 0.01 mm or more and less than 0.08 mm and having a moisture permeability of 30 g / m ² · 24 h or less by moisture permeability measurement on the back surface of the wood fiber board. And laminated and integrated.

  Then, the decorative sheet, the front-side moisture-proof sheet, and the back-side moisture-proof sheet and the wood fiber board integrated with the back-side moisture-proof sheet are laminated and integrated on the plywood substrate via an adhesive to obtain an integrated substrate.

Further, the surface of the decorative sheet in the integrated base material is coated to form a surface decorative layer comprising the coating layer, the decorative sheet, and the surface-side moisture-proof sheet. surface decorative having a moisture barrier layer having the following moisture barrier quality 30g ^/ m 2 · 24h with humidity measurement, and the moisture content of 7% or less of wood fiber board layer, the moisture resistance of less than 30g ^/ m 2 · 24h by moisture permeability measured It is characterized by obtaining a floor heating material in which layers are laminated and integrated in order.

  In this invention of claim 5, after the surface side moisture-proof sheet is laminated and integrated on the surface of the wood fiber board via an adhesive, the decorative sheet is attached to the surface of the surface side moisture-proof sheet by hot pressing. Then, the back-side moisture-proof sheet is laminated and integrated on the back surface of the wood fiber board via an adhesive, and the wood fiber board is laminated on the plywood substrate via the adhesive on the back-side moisture-proof sheet It is integrated and an integrated base material is obtained. The surface of the decorative sheet in the integrated base material is painted to form a surface decorative layer comprising the coating layer, the decorative sheet, and the surface-side moisture-proof sheet. Also in this invention, the flooring for floor heating according to the invention of claim 1 can be manufactured satisfactorily.

According to a sixth aspect of the present invention, there is provided a method for manufacturing a flooring material for floor heating, wherein the moisture content is measured on the back surface of a wood fiberboard having a moisture content of 7% or less and having a thickness of 0.01 mm or more and less than 0.08 mm. After the backside moisture-proof sheet having a moisture permeability of 30 g / m ² · 24 h or less is laminated and integrated through an adhesive, the back-side moisture-proof sheet and the wood fiber board integrated with the back-side moisture-proof sheet are passed through the adhesive on the back-side moisture-proof sheet. The laminated substrate is laminated and integrated to obtain an integrated substrate.

Subsequently, a surface-side moisture-proof sheet having a moisture permeability of 30 g / m ² · 24 h or less by moisture permeability measurement is laminated and integrated on the surface of the wood fiber board of the integrated substrate via an adhesive.

Thereafter, a decorative sheet is laminated and integrated on the surface of the surface-side moisture-proof sheet via an adhesive, and the surface of the decorative sheet is coated, and the surface makeup comprising the coating layer, the decorative sheet, and the surface-side moisture-proof sheet By forming a layer, on the plywood substrate, a moisture-proof layer having a moisture-proof performance of 30 g / m ² · 24 h or less by moisture permeability measurement, a wood fiberboard layer having a moisture content of 7% or less, and a moisture permeability measurement It is characterized by obtaining a floor heating floor material in which a surface decorative layer having moisture resistance of 30 g / m ² · 24 h or less is laminated and integrated in order.

  In this invention of Claim 6, after a back surface side moisture proof sheet is laminated and integrated on the back surface of the wood fiber board via an adhesive, the wood fiber board is attached to the plywood substrate via an adhesive in the back surface side moisture proof sheet. An integrated substrate is obtained by stacking and integrating. Next, after the surface-side moisture-proof sheet is laminated and integrated on the surface of the wood fiber board via an adhesive, a decorative sheet is laminated and integrated on the surface of the surface-side moisture-proof sheet via an adhesive. The surface is painted to form a surface decorative layer comprising the coating layer, the decorative sheet, and the surface moisture-proof sheet. Also in this invention, the flooring for floor heating according to the invention of claim 1 can be manufactured satisfactorily.

According to a seventh aspect of the present invention, there is provided a method for producing a flooring material for floor heating, wherein the moisture content is measured on the back surface of a wood fiber board having a moisture content of 7% or less and having a thickness of 0.01 mm or more and less than 0.08 mm. After the backside moisture-proof sheet having a moisture permeability of 30 g / m ² · 24 h or less is laminated and integrated through an adhesive, the back-side moisture-proof sheet and the wood fiber board integrated with the back-side moisture-proof sheet are passed through the adhesive on the back-side moisture-proof sheet. The laminated substrate is laminated and integrated to obtain an integrated substrate.

Next, a decorative sheet having a moisture permeability of 30 g / m ² · 24 h or less is measured by moisture permeability measurement and laminated on the surface of the wood fiber board of the integrated base material via an adhesive, and the surface comprising the decorative sheet By forming a decorative layer, a moisture-proof layer having a moisture-proof performance of 30 g / m ² · 24 h or less on a plywood substrate, a wood fiberboard layer having a moisture content of 7% or less, and a moisture permeability measurement Thus, a floor heating floor material in which a surface decorative layer having moisture resistance of 30 g / m ² · 24 h or less is laminated and integrated in order is obtained.

  In this invention of claim 7, after the back-side moisture-proof sheet is laminated and integrated on the back surface of the wood fiber board via an adhesive, the wood fiber board is laminated on the plywood substrate via the adhesive in the back-side moisture-proof sheet. The integrated base material is obtained by integration, and then a decorative sheet is laminated and integrated on the surface of the wood fiber board via an adhesive to form a surface decorative layer made of the decorative sheet. Also in this invention, the flooring for floor heating according to the invention of claim 1 can be manufactured satisfactorily.

The floor heating production method according to the invention of claim 8 is the moisture permeability measurement on the back surface of the wood fiber board having a moisture content of 7% or less and a thickness of 0.01 mm or more and less than 0.08 mm. each bonding the backside proof sheet having a moisture permeability of less 30g / m 2 · ^24h, also on the surface of the wood fiber board, the surface moisture sheet having a moisture permeability of less 30g / m 2 · ^24h by moisture permeability measured by Laminate and integrate through the agent.

  Then, the wood fiber board integrated with the back side and front side moisture proof sheets is laminated and integrated on the plywood base material via an adhesive in the back side moisture proof sheet to obtain an integrated base material.

Next, a decorative sheet is laminated and integrated on the surface of the surface-side moisture-proof sheet via an adhesive, and the surface of the decorative sheet is coated, and the surface makeup comprising the coating layer, the decorative sheet, and the surface-side moisture-proof sheet By forming a layer, on the plywood substrate, a moisture-proof layer having a moisture-proof performance of 30 g / m ² · 24 h or less by moisture permeability measurement, a wood fiberboard layer having a moisture content of 7% or less, and a moisture permeability measurement It is characterized by obtaining a floor heating floor material in which a surface decorative layer having moisture resistance of 30 g / m ² · 24 h or less is laminated and integrated in order.

  In this invention of claim 8, after the backside moisture-proof sheet is laminated on the back side of the wood fiber board and the front side moisture-proof sheet is laminated and integrated on the surface of the wood fiber board via an adhesive, the wood fiber board is backside. The side moisture-proof sheet is laminated and integrated with a plywood substrate via an adhesive to obtain an integrated substrate, and a decorative sheet is laminated and integrated on the surface of the surface-side moisture-proof sheet via an adhesive. The surface is coated to form a surface decorative layer comprising the coating layer, the decorative sheet, and the surface moisture-proof sheet. Also in this invention, the flooring for floor heating according to the invention of claim 1 can be manufactured satisfactorily.

In the method for manufacturing a floor heating material according to the invention of claim 9, the moisture content is measured on the back surface of the wood fiber board having a moisture content of 7% or less and having a thickness of 0.01 mm or more and less than 0.08 mm. the backside proof sheet having the following moisture permeability 30g / m 2 · ^24h with, also on the surface of the wood fiber board, respectively adhesive decorative sheet having the moisture permeability 30g / m 2 · ^24h by moisture permeability measured And laminated and integrated.

Thereafter, the wood fiber board integral with the back sheet and the decorative sheet is laminated and integrated on the plywood base material via an adhesive in the back moistureproof sheet to form a surface decorative layer made of the decorative sheet. On the substrate, a moisture-proof layer having a moisture-proof performance of 30 g / m ² · 24 h or less by moisture permeability measurement, a wood fiberboard layer having a moisture content of 7% or less, and a moisture content of 30 g / m ² · 24 h or less It is characterized in that a floor heating floor material in which a moisture-proof surface decorative layer is laminated and integrated in order is obtained.

  In the invention of claim 9, after the back side moisture-proof sheet is laminated on the back side of the wood fiber board and the decorative sheet is laminated and integrated on the surface of the wood fiber board via an adhesive, the wood fiber board is back-side moisture-proof. A surface decorative layer made of a decorative sheet is formed by laminating and integrating with a plywood substrate via an adhesive in the sheet. Also in this invention, the flooring for floor heating according to the invention of claim 1 can be manufactured satisfactorily.

  In the manufacturing method of the flooring for floor heating which concerns on invention of Claim 10, in the manufacturing method of the flooring for floor heating as described in any one of Claims 4-9, it is directly apply | coated to the surface or back surface of the said wood fiber board. The adhesive is a water-based adhesive, and after applying the water-based adhesive having a resin rate of 40% to 60%, it is dried to such an extent that the adhesive force is not lost, and then a moisture-proof layer or a surface decorative layer is laminated. The moisture content of the wood fiberboard layer is 7% or less.

  In the invention of claim 10, even when the adhesive directly applied to the wood fiber board is a water-based adhesive, the water content of the wood fiber board layer is 7 because it is dried to such an extent that the adhesive force is not lost thereafter. %, The floor heating flooring according to the invention of claim 1 can be manufactured satisfactorily. The level not losing the adhesive force here refers to the level that can be laminated and integrated to such an extent that it can be used as a flooring material by general press processing such as hot press, cold press or roll press.

  In the manufacturing method of the flooring for floor heating which concerns on invention of Claim 11, in the manufacturing method of the flooring for flooring any one of the said Claims 4-10, it apply | coats directly on the surface or the back surface of the said wood fiber board. The adhesive is a non-aqueous adhesive, and after applying the non-aqueous adhesive, the moisture content of the wood fiberboard layer is reduced to 7% or less by laminating a moisture-proof layer or a surface decorative layer. And

  In the invention of claim 11, since a non-aqueous adhesive is used as the adhesive applied directly to the front or back surface of the wood fiber board, the adhesive is similar to the invention of claim 2 or claim 10. This can prevent the moisture content of the wood fiberboard layer from increasing.

  In invention of Claim 12, in the manufacturing method of the flooring material for floor heating in any one of Claims 4-11, the process of giving a groove process or actual process and exposing a wood fiber board, The exposed wood fiber board And a moisture-proof coating process for moisture-proof coating the exposed surface of the film.

  In the twelfth aspect of the present invention, even if the grooving or actual processing is performed and the wood fiberboard layer is exposed, the exposed surface is moisture-proof coated. Can be prevented from entering (penetrating) the wood fiberboard layer.

As described above, according to the floor heating material of the invention of claim 1, the moisture resistance on the plywood substrate is 0.01 mm or more and less than 0.08 mm and 30 g / m ² · 24 h or less. A plywood substrate is obtained by laminating and integrating a moisture-proof layer having performance, a wood fiber board layer having a moisture content of 7% or less, and a surface decorative layer having a moisture-proof performance of 30 g / m ² · 24 h or less in order. For moisture control, the moisture content is blocked by the moisture-proof layer and the moisture from the flooring to the wood fiber layer is blocked by the moisture-proof surface decorative layer. During the production of flooring or after aging, the wood fiber board layer can be prevented from linearly expanding due to moisture absorption and warping, and furthermore, the pressure when laminating and integrating the plywood substrate and the wood fiber board layer Moisture-proof defects in the moisture-proof layer that occur, and prevention during floor heating It is possible to suppress the thermal expansion of the layer itself.

  According to the invention of claim 2, the wood fiber board layer, the moisture-proof layer and the surface decorative layer are laminated and integrated with the non-aqueous adhesive, respectively, thereby preventing the moisture content of the wood fiber board layer from being increased by the adhesive. can do.

  According to the invention of claim 3, moisture is transferred (infiltrated) from the exposed surface to the wood fiber board layer by applying the moisture-proof coating to the exposed surface of the wood fiber board layer that has been subjected to groove processing or actual processing. This can be prevented by the moisture-proof coating film.

  According to the floor heating floor material manufacturing method according to the inventions of claims 4 to 9, the floor heating floor material of the invention of claim 1 can be manufactured satisfactorily. In particular, according to the invention of claim 4, a decorative material with a decorative sheet finish can be produced with high productivity.

  In the invention of claim 10, the adhesive directly applied to the front or back surface of the wood fiber board is a water-based adhesive, and the adhesive strength is not lost after the water-based adhesive having a resin ratio of 40% to 60% is applied. Drying to a certain extent, and then laminating a moisture-proof layer or surface decorative layer, the moisture content of the wood fiberboard layer becomes 7% or less, and the moisture content of the wood fiberboard layer is prevented from being increased by the adhesive. Can do.

  In the invention of claim 11, by using a non-aqueous adhesive for the adhesive directly applied to the front or back surface of the wood fiber board, the wood is used by the adhesive as in the invention of claim 2 or claim 10. An increase in the moisture content of the fiberboard layer can be prevented.

  According to the invention of claim 12, the exposed surface is exposed in the same manner as in the invention of claim 3 by exposing the wood fiber board by performing grooving or actual processing and moisture-proofing the exposed surface of the wood fiber board. The moisture-proof coating film can prevent moisture from being transferred (infiltrated) into the wood fiberboard layer.

  Hereinafter, the best embodiment of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, or its application.

  FIG. 1 shows a floor heating material A according to an embodiment of the present invention. This floor heating material A is provided on a plywood substrate 1 with a moisture-proof layer 3, a wood fiberboard layer 5, and a moisture-proof property. And a surface decorative layer 7 having a laminated structure integrated in the order of description.

  In addition, a female fruit 10 is formed on one of both end faces facing the longitudinal direction and the width direction of the floor heating material A, and a male fruit 11 is formed on the other. A and A are joined and constructed by fitting the female seed 10 and the male seed 11 together.

(Plywood substrate)
As a plywood used as the said plywood base material 1, what kind of plywood can be used including softwood and hardwood. The laminating direction of the single plate including the cross plywood and the parallel plywood is also arbitrary. Any kind of tree can be used. As for the moisture content, any plywood can be used except for extremely low and high ones, and a general plywood in the vicinity of 5 to 20% and an air dry moisture content of 10 to 15% is used. Is preferred.

(Dampproof layer)
The moisture-proof layer 3 has a thickness of 0.01 mm or more and less than 0.08 mm, and has a moisture-proof performance (moisture permeability) of 30 g / m ² · 24 h or less as measured by JIS-Z-0208. The material is used. For example, the moisture-proof layer 3 made of a moisture-proof resin sheet is preferable.

  The sheet having a thickness of less than 0.01 mm is inferior in moisture resistance, as well as insufficient strength at the pressure when laminating and integrating the rough plywood substrate 1 and the wood fiberboard layer 5 to become a wood fiberboard layer 5, There is a high possibility that a part of it is broken and a moisture-proof defect occurs. On the other hand, when a sheet having a thickness of 0.08 mm or more is used, there is a risk that when used as a flooring material A for floor heating, the flooring A is warped in the shape of a warp due to thermal expansion of the moisture-proof resin sheet itself. Is not preferable because it increases the cost and causes an increase in cost.

In addition, with a moisture-proof material having a low moisture-proof performance such that the moisture permeability exceeds 30 g / m ² · 24 h, it is difficult to suppress dimensional changes over time. Therefore, the moisture-proof material is preferably one having a performance of 30 g / m ² · 24 h or less, preferably 15 g / m ² · 24 h or less, according to the moisture permeability measurement of JIS-Z-0208.

  Specifically, as a moisture-proof material, a sheet-like material of about 0.01 to 0.08 mm such as an olefin resin or a vinyl resin, a poly sand paper obtained by laminating these sheet-like materials on both sides, aluminum or titanium Examples thereof include metal foil sand paper in which a metal thin film is laminated on both sides with paper.

(Wood fiberboard layer)
The wood fiber board 51 (refer to the manufacturing method described later) such as MDF to be the wood fiber board layer 5 may be either softwood fiber or hardwood fiber, but it is used as the flooring A. Therefore, those using hardwood fibers are particularly preferred because they are excellent in water resistance.

  The wood fiber board 51 as the base material has a moisture content of 7% or less (6% or less in some manufacturing methods), and even when finished as a flooring material A for floor heating, the moisture content is 7 % Is adjusted to be less than or equal to%.

  That is, the water content of the wood fiber board 51 is adjusted to a low water content immediately after manufacture by performing moisture-proof packaging or the like after the manufacture without low water content for warp curing immediately after the manufacture. A low moisture content MDF of about 3 to 6%, or a MDF having a normal moisture content of about 6 to 7% manufactured in a normal state can be used.

  In addition, the measurement of the moisture content of the wood fiber board layer 5 of the flooring material A for floor heating can be confirmed by a completely dry method (JIS standard A5905 fiber board) using a 100-105 degreeC dryer.

  The wood fiber board 51 has a thickness of 0.5 to 3.0 mm (1.5 mm or less in some manufacturing methods) and a specific gravity of about 0.5 to 1.1. If the thickness is less than 0.5 mm, the surface reinforcing function of the wood fiber board 51 cannot be ensured. On the other hand, if it exceeds 3.0 mm, the weight of the entire flooring A becomes heavy.

  Moreover, when the specific gravity of the wooden fiber board 51 is smaller than 0.5, the surface reinforcing function cannot be secured, and the wooden fiber board 51 exceeding 1.1 is heavy because the weight of the entire flooring A becomes heavy. It is not preferable.

  The wood fiber board 51 has several types depending on the type of binder used, such as melamine type, phenol type, urea type, all isocyanate type, etc. Excellent melamine type, phenol type, all isocyanate type and the like are preferable.

(Surface makeup layer)
The surface decorative layer 7 has a moisture-proof performance (moisture permeability) of 30 g / m ² · 24 h or less according to a moisture permeability measurement of JIS-Z-0208.

When the step of providing the surface decorative layer 7 is a cold roll or hot roll press using a PUR hot melt adhesive, JIS-Z-0208 such as resin impregnated decorative paper, resin decorative sheet, poly sand decorative paper, metal foil sand decorative paper, etc. A surface decorative sheet having a moisture resistance of 30 g / m ² · 24 h or less, or a surface decorative sheet having moisture permeability such as a veneer, decorative paper, or resin-impregnated decorative paper can be used. On the other hand, in the case of a hot press, a surface decorative sheet having moisture permeability such as a veneer, decorative paper, and resin impregnated decorative paper is used. In the case of a veneer, any tree species can be used. The surface decorative sheet has a thickness of about 0.05 to 1.0 mm in order to provide a floor heating material that can withstand various environments such as moisture from the surface, moisture, contamination, dragging and dropping of articles. A thicker layer than the moisture-proof layer can be used as needed. Furthermore, you may perform surface coating on this surface as needed. By stacking the surface-side moisture-proof sheet on the surface-decorative sheet itself or between the surface-decorative sheet and the wood fiberboard layer, the moisture-proof property is further provided between the surface-decoration sheet and the wood fiberboard layer. By laminating a surface adhesive layer having a surface-adhesive layer 7 having a moisture-proof performance of 30 g / m ² · 24 h or less according to the moisture permeability measurement of JIS-Z-0208.

Instead of the method of hot pressing, the surface decorative layer 7 may be provided by continuous lamination using a reactive hot melt adhesive (PUR hot melt). In this case, decorative sheets such as a veneer, decorative paper, resin-impregnated decorative paper, and decorative resin sheet are used. Its thickness is about 0.05 to 1.0 mm. In this case, a PUR hot melt is laminated on the wood fiberboard layer 5 in layers, and a decorative sheet having a moisture resistance of 30 g / m ² · 24 h or less is laminated on the laminate by measuring moisture permeability according to JIS-Z-0208. May be. As another form, a surface moisture-proof adhesive having a moisture-proof performance of 30 g / m ² · 24 h or less as measured in accordance with JIS-Z-0208 is measured by laminating PUR hot melt in layers on the wood fiberboard layer 5. A layer may be formed, and a surface decorative sheet having moisture permeability such as decorative paper and a veneer, or a surface decorative sheet having moisture resistance such as a resin-impregnated decorative paper and a resin decorative sheet may be laminated and integrated on the surface. Furthermore, you may perform surface coating as needed.

When the wood fiber board 51 is a thin wood fiber board or the like that is adjusted to have a moisture content of 7% or less, preferably 3 to 4% and a thickness of about 1.5 mm to 2.0 mm, 30 g to 80 g / m ^{2 of} an aqueous adhesive such as an aqueous vinyl urethane adhesive or urea melamine adhesive having a resin rate of 40% to 60%, preferably about 50%, was applied to the surface of the wood fiber board 51. Thereafter, the film is dried for a predetermined time by means of, for example, a ventilating dryer, or an appropriate amount of a non-aqueous adhesive is applied (in the case of this non-aqueous adhesive, an appropriate amount can be used regardless of the application amount), and then the thickness is 0. and about 1mm~1.0mm having the following moisture barrier quality 30g ^/ m 2 · 24h by moisture permeability measured, when the surface-side decorative moistureproof sheet comprising a resin decorative sheet or a resin impregnated decorative sheet integrally laminated together The moisture content of the wood fiber board 51 may be made 7% or less. Furthermore, you may provide a transparent coating-film layer by the coating on the surface of the surface side cosmetic moisture-proof sheet (decorative sheet). Thereby, the moisture content of the wood fiber board 51 (wood fiber board layer 5) can be adjusted stably to 7% or less.

(Surface coating)
When surface coating is performed to form the surface decorative layer 7, it is performed with a general ultraviolet curable paint or electron beam curable paint. The surface coating in this case is appropriately selected depending on the decorative sheet used. For example, when the decorative sheet itself has a moisture-proof performance of 30 g / m ² · 24 h or less according to the moisture permeability measurement of JIS-Z-0208, surface coating in consideration of the abrasion resistance necessary for the flooring material A may be used.

  For example, an ultraviolet curable transparent paint having ultraviolet curing properties is applied by a roll coater, a flow coater, a spray, etc., and then irradiated with ultraviolet rays, whereby the surface of the surface decorative layer 7 has a substantially uniform thickness. A coating layer is formed.

  These UV-curable transparent paints are generally composed of a base paint, an intermediate paint, and a top paint. The undercoat paint seals the veneer and improves the adhesion between the veneer and the intermediate paint. Since the intermediate coating has a predetermined thickness, it contributes to “contamination resistance”, “load resistance”, “improvement of surface hardness”, and the like, and contributes substantially to the performance of the transparent coating film layer. The top coat imparts smoothness to the surface and adjusts the gloss to improve the “designability”.

  As the ultraviolet curable paint or the electron beam curable paint, for example, a solvent-free acrylate resin or a monomer or oligomer of a methacrylate resin is preferably used as the resin. For example, an appropriate amount of a photoinitiator is added to these resins and used as an ultraviolet curable transparent paint. As the ultraviolet curable transparent paint, a solventless type is preferably used. When adjusting the viscosity at the time of coating, monomer components such as an acrylate monomer and a methacrylate monomer are used in place of the organic solvent. About these coating materials, you may use the coating material which has not a general 3 layer structure coating but 2 layer structure, 1 layer structure, and also the layer structure of 4 layers or more.

For example, when an ultraviolet curable coating is used, preferably, a primer coating is applied at a coating amount of about 1.5 g to 5.0 g / scale ² , and then a primer coating layer is formed by ultraviolet irradiation, and then an intermediate coating. Is applied at a coating amount of about 3.0 to 15.0 g / scale ² , and then an intermediate coating layer is formed by ultraviolet irradiation, and then the top coating is applied at a coating amount of about 0.8 to 1.5 g / scale ^2. After coating, a top coat layer is formed by ultraviolet irradiation.

In either case, the surface decorative layer 7 includes a surface side adhesive layer (if necessary), a surface side moisture-proof layer (if necessary), a surface decorative sheet, and a surface coating layer (if necessary). Further, the moisture-proof performance may be 30 g / m ² · 24 h or less according to the moisture permeability measurement of JIS-Z-0208.

(adhesive)
The adhesive for adhering the moisture-proof layer 3 and the wood fiber board layer 5 in a laminated state is a non-aqueous adhesive such as isocyanate, urethane, epoxy, reactive hot melt, or urea melamine, aqueous vinyl urethane Water-based adhesives such as those based on vinyl acetate can be used. Among them, the non-aqueous reactive hot melt adhesive is the most preferable example because it does not increase the moisture content of the wood fiber board.

  In particular, when using a thin wood fiber board 51 of about 1.5 mm to 2.0 mm, it is difficult to make the moisture content of the wood fiber board 51 7% or less. If the coating amount is reduced in order to eliminate moisture from the adhesive, it causes poor adhesion. Therefore, in such a case, when the adhesive directly applied to the wood fiber board 51 is a water-based adhesive, the adhesive strength is not lost after the water-based adhesive having a resin rate of 40% to 60% is applied. It is preferable that the moisture content of the wood fiber board 51 is adjusted to 7% or less by laminating and then laminating the moisture-proof layer 3 or the surface decorative layer 7. In this case, as a drying condition of the adhesive, for example, it is dried for 30 seconds to 180 seconds so that the surface temperature of the adhesive becomes about 40 ° C. to 80 ° C. with a ventilation dryer, a far infrared heater or a high frequency dryer.

  Moreover, you may adjust so that the moisture content of the wood fiber board 51 may be 7% or less by employ | adopting a non-aqueous adhesive for the adhesive agent directly apply | coated to the surface or back surface of the wood fiber board 51. FIG.

  Alternatively, after applying a water-based adhesive on the surface of the wood fiber board 51 and laminating the moisture-proof layer 3 or the surface decorative layer 7 on this surface, the temperature is about 100 ° C. to 130 ° C. and the press time is about 30 to 120 seconds. You may adjust so that the moisture content of the wood fiber board 51 may be 7% or less by hot-pressing and drying or standing to cool immediately after making the exposed surface of the wood fiber board 51 upward.

  In any case, when the moisture-proof layer 3 and the surface decorative layer 7 are provided on the front and back surfaces of the wood fiber board 51, the moisture content of the wood fiber board 51 (wood fiber board layer 5) is 7% or less. It is important that it is adjusted to.

(Actual processing or groove processing)
The female seed 10 and the male seed 11 provided on the four rounds of the end face of the floor A are processed by a grooving machine or a tenor incorporating a general rotary saw or router bit. When the female seed 10 and the male seed 11 are formed so as to reach the wood fiber board layer 5 from the plywood base material 1 beyond the moisture-proof layer 3, the wood fiber board layer 5 is exposed.

  In addition, in addition to or in addition to the fitting fruit of the female fruit 10 and the male fruit 11, the decorative groove is formed so as to reach the wood fiberboard layer 5 beyond the surface decorative layer 7. In this case as well, the wood fiberboard layer 5 is exposed by forming the decorative groove.

(Dampproof treatment)
And it is preferable that the exposed surface of the wood fiber board layer 5 exposed by the said actual process or groove process performs a moisture-proof process. For the moisture-proof treatment, any general moisture-proof treatment agent can be used. For example, UV paint, acrylic emulsion, moisture-proof PUR and the like are used, but not limited thereto.

  The application method may be any equipment such as a non-contact type spray system or curtain coater system, contact type roll coater or spray coater application, vacuum coating equipment, and the like.

  Preferably, the actual part and the groove part are uncomfortable by applying the moisture-proofing treatment in advance after the actual processing and the groove processing and then applying the moisture-proofing treatment by the surface coating after performing the actual processing and the groove processing. It is possible to provide a floor heating material A that has a beautiful appearance and has no appearance.

(Production method)
Next, the manufacturing method of the floor material A for floor heating of the said embodiment is demonstrated. There are, for example, first to fifth manufacturing methods for manufacturing the floor heating material A. Any of the manufacturing methods can satisfactorily manufacture the floor heating material A. In the following description, in order to make the description easy to understand, the “surface” in each material means a surface on the side that becomes the surface of the floor material A for floor heating. Similarly, the “back surface” refers to the surface on the side that is the back surface of the floor heating material A. The same applies to “front side” and “back side”, and the front and back sides and front and back sides of each member are not specified.

(1) First manufacturing method (method according to the invention of claim 4)
In this method, as shown in FIG. 2 (a), a water-based adhesive is applied to the surface of the wood fiber board 51 such as MDF adjusted to have a moisture content of 7% or less, preferably 6% or less, On top of that, a surface-side moisture-proof sheet 71 having a thickness of 0.01 mm to 0.08 mm and having a moisture-proof performance (moisture permeability) of 30 g / m ² · 24 h or less by moisture permeability measurement is placed. After applying a water-based adhesive and further placing a decorative sheet 72 such as a veneer or decorative paper on the surface, the wood fiber board 51, the front moisture-proof sheet 71 and the decorative sheet 72 are laminated and integrated by hot press. .

Next, this is reversed, the vapor is sufficiently diffused from the wood fiber board 51, and in the state where the moisture content of the wood fiber board 51 becomes 7% or less, the thickness is formed on the back side of the wood fiber board 51. Is laminated with a non-aqueous adhesive on the back-side moisture-proof sheet 31 (moisture-proof layer 3) having a moisture-proof performance (moisture permeability) of 0.01 mm to 0.08 mm and a moisture permeability measurement of 30 g / m ² · 24 h or less. At the same time, the moisture content of the wood fiber board 51 is set to 7% or less.

  Further, the plywood substrate 1 is laminated and integrated with a non-aqueous adhesive or an aqueous adhesive on the back side of the back-side moisture-proof sheet 31 in the laminate of the wood fiber board 51, the front-side moisture-proof sheet 71, and the decorative sheet 72.

  A transparent coating layer is provided on the surface of the decorative sheet 72 of the laminate obtained in this way by painting, so that the surface decorative layer 7 = the surface-side moisture-proof sheet 71 + the decorative sheet 72 + the transparent coating layer. Thus, the moisture-proof layer 3, the wood fiberboard layer 5, and the surface decorative layer 7 are sequentially laminated and integrated on the plywood substrate 1.

  And the flooring A for floor heating is obtained by giving actual processing (or groove processing), exposing the wood fiber board layer 5, and carrying out moisture-proof coating of the exposed surface of the exposed wood fiber board layer 5. FIG.

  According to this method, in particular, the surface-side moisture-proof sheet 71 and the decorative sheet 72 are integrated by one hot press, so that the floor heating flooring A finished with the decorative sheet 72 can be manufactured with high productivity.

(2) Second manufacturing method (method according to the invention of claim 5)
In this method, as shown in FIG. 2 (b), the thickness is 0.01 mm on the surface of the wood fiber board 51 such as MDF adjusted to have a moisture content of 7% or less, preferably 6% or less. A surface-side moisture-proof sheet 71 having a moisture-proof performance of ˜0.08 mm and a moisture permeability measurement of 30 g / m ² · 24 h or less is laminated and integrated with a water-based adhesive or a non-water-based adhesive.

  Next, a decorative sheet 72 such as a veneer or a resin-impregnated decorative paper is integrated on the surface of the moisture-proof sheet 71 with water using a flat plate press.

The back-side moisture-proof sheet 31 (moisture-proof layer 3) having a moisture-proof performance of 0.01 g to 0.08 mm on the back side of the wood fiber board 51 in this laminate and a moisture permeability measurement of 30 g / m ² · 24 h or less. Are laminated and integrated through a non-aqueous adhesive, and the moisture content of the wood fiber board is set to 7% or less. The plywood substrate 1 is further laminated and integrated on the back surface of the back-side moisture-proof sheet 31.

  A transparent coating film layer is provided by painting on the surface of the decorative sheet 72 of the laminate thus obtained, and the surface decoration layer 7 = surface-side moisture-proof sheet 71 + decoration sheet 72 + transparent coating film layer. Thus, the moisture-proof layer 3, the wood fiber board layer 5, and the surface decorative layer 7 are laminated and integrated in order on the plywood substrate 1, and further subjected to actual processing (or groove processing) to provide the wood fiber board. Layer 5 is exposed and the exposed surface is moisture proof.

(3) Third manufacturing method (method according to the invention of claim 6)
In this method, as shown in FIG. 2 (c), the thickness is 0.01 mm on the back surface of the wood fiber board 51 such as MDF adjusted so that the moisture content is 7% or less, preferably 6% or less. A back-side moisture-proof sheet 31 (moisture-proof layer 3) having a moisture-proof performance of ˜0.08 mm and a moisture permeability measurement of 30 g / m ² · 24 h or less is laminated and integrated with a non-aqueous adhesive.

  Thereafter, the plywood base material 1 is laminated and integrated on the back side of the back-side moisture-proof sheet 31 by a cold pressure with an aqueous vinyl urethane adhesive.

Furthermore, a surface-side moisture-proof sheet 71 having a thickness of 0.01 mm to 0.08 mm and a moisture-proof performance of 30 g / m ² · 24 h or less is measured on the surface of the wood fiber board 51 by reactive hot melt bonding. The non-aqueous adhesive such as an adhesive, urethane adhesive, and epoxy adhesive is laminated and integrated, and the moisture content of the wood fiber board 51 is set to 7% or less.

  When the surface-side moisture-proof sheet 71 is formed of a base sheet such as resin-impregnated paper or polysand paper, a decorative sheet 72 such as a veneer or decorative paper is adhered and integrated on the further surface side of the surface-side moisture-proof sheet 71. .

  In this case, since the moisture transfer to the wood fiber board 51 does not occur due to the surface-side moisture-proof sheet 71 (base sheet), the lamination of the surface-side moisture-proof sheet 71 and the decorative sheet 72 may be a water-based adhesive. An aqueous adhesive may be used. Moreover, lamination | stacking integration by the hot-pressure press roll by hot-melt-type adhesive agents, such as PUR, may be sufficient, and hot-pressure lamination | stacking integration using a flat plate press or cold-pressure lamination | stacking integration may be sufficient.

  A transparent coating layer is provided on the surface of the decorative sheet 72 by painting. In this case, the surface decorative layer 7 = the surface-side moisture-proof sheet 71 + the decorative sheet 72 (the veneer or decorative paper) + the transparent coating layer.

  Then, actual processing (or groove processing) is performed to expose the wood fiberboard layer 5, and the exposed surface is moisture-proof coated. In this way, flooring A for floor heating is obtained.

(4) Fourth manufacturing method (method according to the invention of claim 7)
In this method, as shown in FIG. 3A, in the third method, the surface-side moisture-proof sheet 71 has a thickness of about 0.1 mm to 1.0 mm and a moisture permeability measurement of 30 g / m ^2. A resin decorative sheet or a resin-impregnated decorative sheet having a moisture-proof performance of 24 h or less is used, and the subsequent decorative sheet is not attached or surface-coated. The rest is the same as the third method (see FIG. 2C). In this case, the surface decorative layer 7 = surface-side moisture-proof sheet 71 (resin decorative sheet or resin-impregnated decorative sheet).

(5) Fifth manufacturing method (method according to claims 8 and 9)
In this method, as shown in FIG. 3 (b), the thickness is 0.01 mm on the surface of the wood fiber board 51 such as MDF adjusted so that the moisture content is 7% or less, preferably 6% or less. The surface-side moisture-proof sheet 71 having a moisture-proof performance of 30 g / m ² · 24 h or less by a water vapor permeability measurement of 0 to 0.08 mm, and the thickness of the same as the surface-side moisture-proof sheet 71 on the back surface of the wood fiber board 51 A back-side moisture-proof sheet 31 (moisture-proof layer 3) having a moisture-proof performance of 0.01 mm to 0.08 mm and a moisture permeability measurement of 30 g / m ² · 24 h or less is laminated and integrated with a non-aqueous adhesive, respectively.

  Then, the plywood substrate 1 is laminated and integrated on the back side of the back side moisture-proof sheet 31 by cold pressure with an adhesive.

  When the surface moisture-proof sheet 71 is formed of a base sheet such as resin-impregnated paper or poly sand paper, a decorative sheet 72 such as a veneer or decorative paper is further pasted on the surface with a water-based adhesive or a non-water-based adhesive. Then, a transparent coating layer is provided on the surface of the decorative sheet 72 by painting. In this case, surface decorative layer 7 = surface-side moisture-proof sheet 71 (base sheet) + decorative sheet 72 (projector plate or decorative paper) + transparent coating layer.

  Further, when the surface-side moisture-proof sheet 71 is a resin decorative sheet or resin-impregnated decorative sheet having desired moisture-proof properties, the surface decorative layer 7 = surface-side moisture-proof sheet 71 (resin decorative sheet or resin-impregnated decorative sheet). Further, a transparent coating layer may be provided by painting on the surface of this surface-side moisture-proof sheet 71 (resin decorative sheet or resin-impregnated decorative sheet). In this case, the surface decorative layer 7 = surface-side moisture-proof sheet 71 (resin makeup) Sheet or resin-impregnated decorative sheet) + transparent coating layer.

  Then, actual processing (or groove processing) is performed to expose the wood fiberboard layer 5, and the exposed surface is moisture-proof coated. In this way, flooring A for floor heating is obtained.

  Next, specific examples will be described.

(Example)
In this embodiment, a flooring material is manufactured by the third manufacturing method. That is, on the back surface of a 300 mm × 300 mm wood fiber board (MDF) having a moisture content of 5.0%, a moisture resistance of 15 g / m ² · 24 h by a moisture permeability measurement of 0.05 mm and JIS-Z-0208 ( A polyethylene resin sheet having a moisture permeability) was bonded and integrated through a non-aqueous reactive hot melt adhesive to obtain a moisture-proof wood fiber board having a moisture-proof layer.

  A water-based vinyl urethane adhesive is further applied to the back side of the resin moisture-proof layer of the moisture-proof wood fiber board, and the moisture-proof wood fiber board is made of a 5-ply plywood having a thickness of 9.5 mm and a moisture content of 11% (all single-sheet fibers). A composite base material was obtained by laminating and integrating them by a cold press. The cold press was reversed for each sheet, and face-to-face deposition was performed in which the plywood and wood fiber boards face-to-face. The obtained composite substrate was substantially flat.

A polyethylene resin sheet having a thickness of 0.05 mm and a moisture-proof performance (moisture permeability) of 15 g / m ² · 24 h by a moisture permeability measurement of JIS-Z-0208 is applied to the surface of the wood fiber board in this composite substrate. The adhesive hot-melt adhesive 100 g / m ² was applied and integrated, and then a urea melamine adhesive with a resin rate of 50% was applied 70 g / m ² to form a 0.25 mm thick decorative veneer. Sticking integrated.

  The laminate thus obtained was hot-pressed under the conditions of 120 ° C., 0.8 MPa, and 50 seconds, and immediately allowed to cool for 60 seconds. It was 5.0% when the moisture content of the wood fiber board was measured with the high frequency type moisture content meter.

  Thereafter, a floor coating was obtained by quickly applying an undercoat, an intermediate coat and an overcoat with an ultraviolet curable resin. The obtained flooring had almost no warpage.

(Comparative example)
A 300 mm × 300 mm wood fiber board having a moisture content of 7.5% was used instead of the moisture-proof wood fiber board of the example. Apply a water-based vinyl urethane adhesive to the back of this wood fiberboard, and cold-ply a 5-ply plywood with a thickness of 9.5 mm and a moisture content of 11% (the fiber directions of all the single plates are orthogonal to each other) Lamination and integration were performed with a press to obtain a composite substrate. The cold press was performed by sequential deposition. The obtained composite substrate was slightly warped.

A decorative veneer having a thickness of 0.25 mm was bonded and integrated on the surface of the wood fiber board of the composite base material via a 70 g / m ² urea melamine adhesive having a resin rate of 50%.

  The laminate thus obtained was hot-pressed under the conditions of 120 ° C., 0.8 MPa, and 50 seconds, and immediately allowed to cool for 60 seconds. When the moisture content of the wood fiber board was measured with a high frequency moisture meter, it was 9.0%. Thereafter, a base coating, an intermediate coating, and a top coating were quickly performed with an ultraviolet curable resin to obtain a cosmetic material. The obtained cosmetic material was considerably warped.

(Evaluation)
The hill warp (or valley warp) in the X direction and the Y direction (directions orthogonal to each other) of the flooring materials according to Examples and Comparative Examples thus obtained was measured. This corresponds to a state immediately after manufacturing the flooring.

  Further, it was left in a ventilation dryer at 80 ° C. for 96 hours, immediately taken out, and the ridge warp (or valley warp) in the X direction and the Y direction was measured. This corresponds to a state when floor heating is used. The results are shown in FIG.

  Considering the results shown in FIG. 4, the example with the moisture-proof layer is significantly smaller in warpage than the comparative example without the moisture-proof layer. It has been found that a floor heating floor material can be obtained which is not affected by the humidity of the floor and has little thermal deformation due to heat when using the floor heating.

  INDUSTRIAL APPLICABILITY The present invention provides a floor heating floor material that is less susceptible to moisture such as a plywood base material and thermal deformation during use, and thus is extremely useful and has high industrial applicability.

Drawing 1 is an expanded sectional view of the flooring for floor heating concerning the embodiment of the present invention. Drawing 2 is an explanatory view showing the 1st-the 3rd manufacturing method of the flooring for floor heating. FIG. 3 is explanatory drawing which shows the 4th and 5th manufacturing method of the flooring for floor heating. FIG. 4 is a diagram showing the measurement results of warpage in Examples and Comparative Examples.

DESCRIPTION OF SYMBOLS A Floor material for floor heating 1 Plywood base material 3 Moisture-proof layer 5 Wood fiber board layer 7 Surface decorative layer 10 Female 11 Male fruit 31 Back side moisture-proof sheet 51 Wood fiber board 71 Surface side moisture-proof sheet 72 Cosmetic sheet

Claims (12)

A floor heating floor material in which a moisture-proof layer, a wood fiber board layer, and a moisture-proof surface decorative layer are laminated and integrated in order on a plywood substrate,
The moisture-proof layer has a thickness of 0.01 mm or more and less than 0.08 mm, and has a moisture-proof performance of 30 g / m ² · 24 h or less according to moisture permeability measurement.
The wood fiberboard layer has a moisture content of 7% or less,
The floor covering material for floor heating according to claim 1, wherein the surface decorative layer has a moisture-proof performance of 30 g / m ² · 24 h or less by measuring moisture permeability. In claim 1,
A floor heating floor material, wherein the moisture-proof layer, the wood fiber board layer, and the wood fiber board layer and the surface decorative layer are each laminated and integrated with a non-aqueous adhesive. In claim 1 or 2,
A floor heating floor characterized in that at least one of groove processing and actual processing is applied so that the wood fiber board layer is exposed at the end face, and the exposed surface of the exposed wood fiber board layer is moisture-proof coated Wood. On the surface of a wood fiber board having a moisture content of 7% or less, a surface-side moisture-proof sheet having a moisture permeability of 30 g / m ² · 24 h or less is placed through an adhesive by measuring moisture permeability, and the surface-side moisture-proof sheet After placing the decorative sheet on the top via an adhesive,
The surface side moisture-proof sheet and the decorative sheet are laminated and integrated on the surface of the wood fiber board by hot pressing,
Next, an adhesive is applied to the back side moisture-proof sheet having a thickness of 0.01 mm or more and less than 0.08 mm and having a moisture permeability of 30 g / m ² · 24 h or less by moisture permeability measurement on the back surface of the wood fiber board. Integrated through
The decorative sheet, the front-side moisture-proof sheet and the back-side moisture-proof sheet and the wood fiber board integrated with the back-side moisture-proof sheet are laminated and integrated with the plywood substrate via an adhesive to obtain an integrated substrate,
Moisture permeability measurement on a plywood substrate by coating the surface of the decorative sheet in the integrated substrate and forming a surface decorative layer comprising the coating layer, the decorative sheet and the surface moisture-proof sheet A moisture-proof layer having a moisture-proof performance of 30 g / m ² · 24 h or less, a wood fiberboard layer having a moisture content of 7% or less, and a surface decorative layer having a moisture-proof property of 30 g / m ² · 24 h or less by measuring moisture permeability To obtain a floor heating floor material that is laminated and integrated in order. After the moisture content of the surface side moisture-proof sheet having a moisture permeability of 30 g / m ² · 24 h or less is laminated and integrated through an adhesive on the surface of the wood fiber board having a moisture content of 7% or less,
By hot pressing, the decorative sheet is laminated and integrated on the surface of the moisture-proof sheet on the surface side through an adhesive,
Next, an adhesive is applied to the back side moisture-proof sheet having a thickness of 0.01 mm or more and less than 0.08 mm and having a moisture permeability of 30 g / m ² · 24 h or less by moisture permeability measurement on the back surface of the wood fiber board. Integrated through
The decorative sheet, the front-side moisture-proof sheet and the back-side moisture-proof sheet and the wood fiber board integrated with the back-side moisture-proof sheet are laminated and integrated with the plywood substrate via an adhesive to obtain an integrated substrate,
Moisture permeability measurement on a plywood substrate by coating the surface of the decorative sheet in the integrated substrate and forming a surface decorative layer comprising the coating layer, the decorative sheet and the surface moisture-proof sheet A moisture-proof layer having a moisture-proof performance of 30 g / m ² · 24 h or less, a wood fiberboard layer having a moisture content of 7% or less, and a surface decorative layer having a moisture-proof property of 30 g / m ² · 24 h or less by measuring moisture permeability To obtain a floor heating floor material that is laminated and integrated in order. A moisture proof sheet on the back side having a moisture content of not less than 0.01 mm and less than 0.08 mm and having a moisture permeability of 30 g / m ² · 24 h or less on the back surface of a wood fiber board having a moisture content of 7% or less After laminating and integrating with an adhesive,
A laminated fiberboard integrated with the backside moisture-proof sheet and a plywood substrate via an adhesive in the backside moisture-proof sheet to obtain an integrated substrate,
Subsequently, after the surface-side moisture-proof sheet having a moisture permeability of 30 g / m ² · 24 h or less by moisture permeability measurement is laminated and integrated with an adhesive on the surface of the wood fiber board of the integrated substrate,
A decorative sheet is laminated and integrated on the surface of the surface-side moisture-proof sheet via an adhesive,
By coating the surface of the decorative sheet and forming a surface decorative layer comprising the coating layer, the decorative sheet and the moisture-proof sheet on the surface side, 30 g / m ^2. A moisture-proof layer having a moisture-proof performance of 24 h or less, a wood fiberboard layer having a moisture content of 7% or less, and a surface decorative layer having a moisture-proof property of 30 g / m ² · 24 h or less by measuring moisture permeability are laminated and integrated in order. A method for producing a floor heating floor material, characterized in that a floor heating floor material is obtained. A moisture proof sheet on the back side having a moisture content of not less than 0.01 mm and less than 0.08 mm and having a moisture permeability of 30 g / m ² · 24 h or less on the back surface of a wood fiber board having a moisture content of 7% or less After laminating and integrating with an adhesive,
A laminated fiberboard integrated with the backside moisture-proof sheet and a plywood substrate via an adhesive in the backside moisture-proof sheet to obtain an integrated substrate,
Next, a decorative sheet having a moisture permeability of 30 g / m ² · 24 h or less is measured by moisture permeability measurement and laminated on the surface of the wood fiber board of the integrated base material via an adhesive, and the surface comprising the decorative sheet By forming a decorative layer, a moisture-proof layer having a moisture-proof performance of 30 g / m ² · 24 h or less on a plywood substrate, a wood fiberboard layer having a moisture content of 7% or less, and a moisture permeability measurement To obtain a floor heating floor material in which a surface decorative layer having moisture resistance of 30 g / m ² · 24 h or less is laminated and integrated in order. A moisture proof sheet on the back side having a moisture content of not less than 0.01 mm and less than 0.08 mm and having a moisture permeability of 30 g / m ² · 24 h or less on the back surface of a wood fiber board having a moisture content of 7% or less In addition, after the surface-side moisture-proof sheet having a moisture permeability of 30 g / m ² · 24 h or less by moisture permeability measurement is laminated and integrated with an adhesive on the surface of the wood fiber board,
The above-mentioned back side and front side moisture proof sheet and a wood fiber board integral with the back side moisture proof sheet are laminated and integrated on a plywood base material via an adhesive to obtain an integrated base material,
Next, the decorative sheet is laminated and integrated on the surface of the moisture-proof sheet on the surface side with an adhesive,
By coating the surface of the decorative sheet and forming a surface decorative layer comprising the coating layer, the decorative sheet and the moisture-proof sheet on the surface side, 30 g / m ^2. A moisture-proof layer having a moisture-proof performance of 24 h or less, a wood fiberboard layer having a moisture content of 7% or less, and a surface decorative layer having a moisture-proof property of 30 g / m ² · 24 h or less by measuring moisture permeability are laminated and integrated in order. A method for producing a floor heating floor material, characterized in that a floor heating floor material is obtained. A moisture proof sheet on the back side having a moisture content of not less than 0.01 mm and less than 0.08 mm and having a moisture permeability of 30 g / m ² · 24 h or less on the back surface of a wood fiber board having a moisture content of 7% or less In addition, a decorative sheet having a moisture permeability of 30 g / m ² · 24 h or less is laminated and integrated with an adhesive on the surface of the wood fiber board,
The plywood substrate is formed by laminating and integrating the wood fiber board integrated with the back sheet and the decorative sheet on the plywood substrate through an adhesive in the back moisture-proof sheet to form a surface decorative layer made of the decorative sheet. Further, a moisture-proof layer having a moisture-proof performance of 30 g / m ² · 24 h or less by moisture permeability measurement, a wood fiberboard layer having a moisture content of 7% or less, and a moisture-proof property of 30 g / m ² · 24 hours or less by moisture permeability measurement A method for producing a floor heating floor material, comprising a floor heating floor material in which a surface decorative layer having a plurality of layers is sequentially laminated and integrated. In any one of Claims 4-9,
The adhesive applied directly to the front or back surface of the wood fiber board is a water-based adhesive,
After applying the aqueous adhesive having a resin rate of 40% to 60%, it is dried to such an extent that the adhesive strength is not lost, and then a moisture-proof layer or a surface decorative layer is laminated so that the moisture content of the wood fiberboard layer is 7 % Or less, the manufacturing method of the flooring for floor heating characterized by the above-mentioned. In any one of Claims 4-10,
The adhesive directly applied to the front or back surface of the wood fiber board is a non-aqueous adhesive,
A method for producing a flooring material for floor heating, wherein the moisture content of the wood fiberboard layer is reduced to 7% or less by laminating a moisture-proof layer or a surface decorative layer after applying the non-aqueous adhesive. In any one of Claims 4-11,
A step of exposing the wood fiber board by performing groove processing or actual processing;
A method for producing a flooring material for floor heating, comprising a moisture-proof coating step of moisture-proofing the exposed surface of the exposed wood fiber board.

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