JP2010007275A - Floor member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor member capable of preventing a coating in a decorative groove from lifting. <P>SOLUTION: This floor member 1 is constituted by arranging a surface decorative member 5 on a wooden chip resin composite material 4 arranged on a surface side of a plywood 2, forming the decorative grooves 7, 8, 9 reaching the wooden chip composite material from a surface of the surface decorative member 5, and finishing a surface by coating. A middle density fiber board 3 is provided between the plywood and the wooden chip resin composite material. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a floor material that forms a floor surface of a building such as a house.

  The present applicant has proposed the flooring described in Patent Document 1 so far.

  The flooring material described in Patent Document 1 is formed by integrating a surface decorative material on a surface side of a base material such as plywood via a wood powder resin composite, and forming a decorative groove reaching the wood powder resin composite from the surface decorative material. It has been done.

  Wood powder resin composite material is compounded with thermoplastic resin such as polypropylene resin, polyvinyl chloride resin, ABS resin, etc., around 20-70 wt%, and if necessary, inorganic filler, reinforcing material, etc. are added and kneaded. For example, Satoshi Konishi et al., “Wood Plastic Board” Application for Thin Reform Building Materials, Matsushita Electric Engineering Technical Report, May 2004. .

  As described in the above document, a wood plastic board can be produced by extrusion molding a kneaded wood powder resin composite, and the produced wood plastic board is made of polypropylene resin and is made of plywood or MDF. Compared to thermal expansion, the dimensional change under the conditions of high bending strength, low humidity in winter, and high humidity in summer is small in hygroscopic expansion. In addition, it is sufficiently smaller than MDF. In general, in the case of wood, the shrinkage rate is about 0.3 to 0.4%, whereas in the case of wood plastic, the shrinkage rate can be suppressed to about 1/10 of that of wood.

  By using such a wood powder resin composite material for the surface layer, the flooring can maintain the smoothness of the surface, improve crack resistance, scratch resistance, use of furniture with casters and falling of objects The occurrence of scratches and dents due to impacts and the like is less likely to occur, and the surface cosmetic material is prevented from being pushed up and warped by moisture absorption, and further, the gap due to drying and the occurrence of cracks in the surface cosmetic material are suppressed.

In addition, since the decorative groove does not reach the base material, the flooring does not have fuzz that tends to occur when it is formed on a wooden board, and there is little catching of stockings or socks, and a good walking feeling can be realized.
JP 2000-066469 A

  Thus, although it is the said floor material excellent in various characteristics, such as crack resistance, scratch resistance, and dimensional stability, the subject which must be solved by subsequent examination was discovered.

  The surface of the flooring material is generally coated for the purpose of protecting the surface and maintaining the appearance and finishing the surface more beautifully. In the floor material, the decorative groove is formed by groove processing until the decorative groove reaches the wood powder resin composite material from the surface decorative material. If the depth of the decorative groove is shallow, the surface has a weak accent on the design. Therefore, in order to improve the design, the depth of the decorative groove needs to be increased to some extent. Is formed up to wood powder resin composite. When the surface of the floor material thus grooved is finished by painting, the paint adheres to the wood powder resin composite material exposed in the decorative groove. As mentioned above, the main component of the wood powder resin composite is resin, and since the rate of thermal expansion and contraction does not necessarily match the blending components of the paint, the coating film follows the expansion and contraction of the wood powder resin composite by repeated cold heat. It may not be possible to peel off from the bottom of the decorative groove and float up to the surface side. In particular, in a floor heating system, the temperature difference between repeated cold heat is large, and the thermal stress applied to the flooring is large. For this reason, the lift of the coating film as described above is likely to occur.

  This invention is made | formed in view of the situation as mentioned above, and makes it the subject to provide the flooring which can suppress the lift of the coating film in a makeup groove.

  In order to solve the above problems, the present invention provides a surface decorative material on a wood powder resin composite disposed on the surface side of a plywood, and the surface of the surface decorative material is changed to a wood powder resin composite. It is a flooring that has a decorative groove to reach and has a painted finish, and is characterized in that a medium density fiberboard is interposed between the plywood and the wood powder resin composite material.

  According to the present invention, since the medium density fiberboard suppresses the expansion and contraction of the wood powder resin composite material due to the repetition of cold heat, the coating film on the surface formed by the coating finish easily follows the expansion and contraction of the wood powder resin composite material, The lift of the coating film in the decorative groove is suppressed.

  FIG. 1 is a perspective view and a partial sectional view showing an embodiment of a flooring of the present invention.

  The flooring 1 having a substantially rectangular shape in plan view includes a plywood 2, an MDF (medium density fiberboard) 3, a plate-like wood powder resin composite 4, and a decorative sheet 6 as a surface decorative material 5 from below to above. They are sequentially stacked and integrated.

  On the surface of the flooring 1, two long decorative grooves 7 extending in the longitudinal direction of the flooring 1 are formed in parallel at regular intervals, and the side edges on the long side of the flooring 1 are opposed to the side edges. Two short decorative grooves 8 extending in the short direction of the flooring 1 up to the decorative groove 7 are formed in parallel at regular intervals. Each of the decorative grooves 8 is not arranged on the same straight line as the other decorative grooves 8. A short decorative groove 9 is formed on the surface of the flooring 1 so as to straddle the two decorative grooves 7 and extend in parallel with the decorative grooves 8. Each of the decorative grooves 7, 8, 9 has a depth reaching the wood powder resin composite material 4 from the surface of the decorative sheet 6. On the other hand, the decorative grooves 7, 8, and 9 do not penetrate the wood powder resin composite material 4 and do not reach the MDF 3. Such decorative grooves 7, 8, and 9 all have a V-shaped cross section, but the cross-sectional shape may be a U-shape. The number, length, cross-sectional shape, etc. of the decorative grooves 7, 8, 9 can be appropriately set in consideration of the design effect.

  The flooring 1 has a finished surface by painting. The surface of the olefin sheet or the like constituting the decorative sheet 6 can be subjected to, for example, a primer treatment, and various paints can be applied to the surface of the flooring 1 with good adhesion, that is, the surface of the decorative sheet 6. Painted.

  Such a flooring 1 can be manufactured as follows, for example.

  A decorative sheet 6 capable of giving a desired appearance such as a wood texture on the plate-like wood powder resin composite material 4 is considered in consideration of the properties of each material, for example, an SBR adhesive or a melamine adhesive. A surface layer material is prepared by bonding with an adhesive such as Moreover, MDF3 is adhere | attached on the plywood 2 with an adhesive agent, and a base material is produced. Then, the surface layer material is overlaid on the base material, that is, on the MDF 3 so that the wood powder resin composite material 4 is disposed on the lower side, and between the MDF 3 and the wood powder resin composite material 4. For example, bonding is performed using an adhesive such as urethane-modified vinyl resin adhesive. Thereafter, the decorative grooves 7, 8, 9 are formed on the surface of the surface layer material by the groove processing at the depth as described above, and then the entire surface including the decorative grooves 7, 8, 9 is painted by urethane coating finish or the like. Finish.

  A general purpose plywood 2 is used. The same applies to MDF3, and it is possible to use a material obtained by finely cutting a wood chip, adding a synthetic resin (adhesive) to a steamed and defibrated material, and then molding it into a plate shape. The wood powder resin composite material 4 is as described above, and a “wood plastic board” formed into a plate shape can be used.

  Since the flooring material 1 includes the wood powder resin composite material 4 in the surface layer material in the same manner as the flooring material proposed previously, the surface smoothness can be maintained, and crack resistance and scratch resistance can be maintained. The use of furniture with casters and the occurrence of scratches and dents due to impacts such as falling objects are less likely to occur, and the decorative sheet 6 is pushed up and warped due to moisture absorption, and the gaps caused by drying are suppressed. The In addition, since the decorative grooves 7, 8, and 9 do not reach the base material, there is no fuzz that tends to occur when forming on a wooden board, and there is little catching of stockings or socks, and a good walking feeling can be realized. Furthermore, the floor material 1 has a good appearance in which a three-dimensional effect with a design accent appears by the decorative grooves 7, 8, and 9 reaching the wood powder resin composite material 4.

  And since the MDF 3 is interposed between the plywood 2 and the wood powder resin composite material 4 in the flooring 1 as described above, the decorative grooves 7, 8 of the wood powder resin composite material 4 due to repeated cold heat, The expansion and contraction in the width direction of 9 is relaxed and suppressed by the MDF 3. For this reason, even if the paint adheres to the wood powder resin composite material 4 exposed in the makeup grooves 7, 8, 9 after the formation of the makeup grooves 7, 8, 9, the formed coating film 10 is not It can be expanded and contracted following the expansion and contraction of the composite material 4, and the coating film 10 is prevented from peeling off from the bottom of the decorative grooves 7, 8, and 9 and rising to the surface side. Accordingly, the floor material 1 has a large temperature difference in repeated cold heat, and the floating of the coating film 10 is sufficiently suppressed even in a floor heating system in which a large thermal stress is applied. The floor surface can be maintained in a good quality state.

  The present invention does not particularly limit the thicknesses of the plywood 2, the MDF 3, the wood powder resin composite material 4, the surface decorative material 5, and the coating film 10, and is appropriately set in consideration of the prior art. In addition, there are no particular restrictions on the materials constituting them and the types of adhesives used for lamination and integration.

It is the perspective view and partial sectional view which showed one Embodiment of the flooring of this invention.

Explanation of symbols

1 Flooring 2 Plywood 3 MDF
4 Wood powder resin composite material 5 Surface decorative material 6 Cosmetic sheet 7, 8, 9 Cosmetic groove 10 Coating film

Claims (1)

  A surface decorative material is arranged on the wood powder resin composite material arranged on the surface side of the plywood, a makeup groove is formed from the surface of the surface cosmetic material to the wood powder resin composite material, and the surface is painted and finished. A flooring material comprising a medium density fiberboard interposed between a plywood and a wood powder resin composite material.

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