JP2014181442A - Floor material for floor heating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor material for floor heating that does not cause curling up of the floor material at a corner portion including a groove.SOLUTION: A floor material 10 for floor heating comprises a decorative layer 1 having a thickness of 1 mm or more and a laminated woody base material layer 2. Tongues 4 and grooves 3 are alternately formed on a circumference of the floor material, and three layers of the laminated woody base material layer 2 are formed between the surface of the decorative layer 1 and an upper jaw part 3a of a groove 3 (shown as a symbol H in the figure). Further, a ratio [Hp/(Hp+Hc)] is 0.45 to 0.55, where Hp is a total thickness of boards of which grain is parallel to the longitudinal direction of the floor material (the decorative layer 1 and a second plywood layer 2b) and Hc is a total thickness of boards of which grain is parallel to the lateral direction of the floor material (a first plywood layer 2a and a third plywood layer 2c).

Description

  The present invention relates to floor materials for floor heating.

  For flooring used in detached houses, condominiums and other buildings, in addition to solid flooring made of solid wood, the surface of a wooden substrate made of plywood, MDF, etc., or these wooden substrates are laminated For example, there is a decorative flooring material in which a decorative board of a precious wood is pasted on the surface of a wooden base material.

  The decorative flooring material uses plywood, which has less expansion and contraction due to moisture than solid wood, as the base material, and various coatings are applied to the surface to prevent moisture from entering the interior. It has come to be used in many construction sites because it is easy to handle with little warpage in the usage environment after construction.

  The decorative board has a thickness of about 0.2 to 0.6 mm (usually such a decorative board is referred to as a “thin board”) and a thickness of about 0.7 to 3.0 mm (usually this Such a decorative plate is called a “thick plate”.) A thin plate is manufactured by cutting a block laminated body obtained by combining and adhering a plurality of decorative material blocks with a slicer. A decorative board manufactured by such a manufacturing method is called a veneer. On the other hand, as a thick plate, in addition to a veneer, a relatively thick one is often manufactured by cutting wood with a band saw or the like. A decorative board manufactured by such a manufacturing method is called a ground board.

  The decorative flooring material using a thin plate has various advantages such as low shape change caused by moisture, so-called veneer, high production efficiency, and easy selection of parts without defects such as joints. .

  On the other hand, solid flooring that is excellent in texture as wood is being reviewed, although there are some defects, reflecting recent changes in consumer preferences regarding housing. However, as described above, solid flooring also has a demerit that the shape change caused by moisture is large. Against this background, there is an increasing demand for thick-plate decorative flooring materials that have the same wood texture as solid wood. However, the thick plate is not as good as the solid flooring, but has a demerit that the shape change caused by moisture is larger than that of the thin plate.

  As a method for preventing such a change in shape, in Patent Document 1, two types of floor materials, a pressed shape and a receiving shape, are combined with a solid wooden floor material or a wooden floor material using a thick plate, and the pressed shape is screwed. The invention which prevents the curvature of the whole flooring by doing is disclosed.

  Further, Patent Documents 2 and 3 disclose an invention in which a groove is formed on the surface of a wooden base material, and a thick plate is attached to the top thereof to reduce the valley warp of the flooring.

JP2007-239343 JP-A-8-144485 JP2004-197357

  The present inventors conducted a high-temperature drying experiment assuming use on a floor heating floor in order to use a floor material in which a decorative board having a thickness of 1 mm or more is attached to a plywood as a floor heating floor. It was found that the side side female berries jumped up. If the decorative board has a thickness of about 0.3 mm, even if it is placed in a high-temperature drying environment assuming a floor heating floor, its expansion and contraction force does not surpass the rigidity of a wooden substrate such as plywood. Even if the warp due to the warp of the wooden base material itself occurs in the flooring material, the side material of the flooring material does not jump up. That is, such jumping is a problem peculiar to the case where a floor material in which a decorative board having a thickness of 1 mm or more is attached to a plywood is used for a floor heating floor.

  The present invention solves such a problem of the prior art, and provides a floor heating floor material that does not cause a jump in the side female side of the floor material even when used for a floor heating floor. For the purpose.

  The inventors of the present invention have conducted intensive research, and this problem is particularly significant between the surface of the decorative layer and the upper jaw of the side-side female fruit. It has been found that this is due to the poor balance between the total thickness Hp of the parallel plate materials and the total thickness Hc of the plate materials whose grain is parallel to the transverse direction of the flooring.

  The gist of the present invention is the following floor heating flooring.

  (1) A floor heating flooring material comprising a decorative layer having a thickness of 1 mm or more and a laminated wood base material layer, wherein a male and a female are alternately formed on the four sides, and the side female from the surface of the decorative layer Between the actual upper jaw part, the number of layers of the laminated wood base layer is three, the grain is parallel to the floor material longitudinal direction, the total thickness Hp of the plate material, and the grain is parallel to the floor material lateral direction A floor heating floor material having a ratio [Hp / (Hp + Hc)] of 0.40 to 0.55 with the total thickness Hc of the thick plate material.

  (2) Ratio of the total thickness Htp of the plate material whose grain is parallel to the longitudinal direction of the floor material and the total thickness Htc of the plate material whose grain is parallel to the transverse direction of the floor material in the whole flooring [Htp / (Htp + Htc) ] Is a floor material for floor heating according to the above (1), which is 0.40 to 0.60.

  (3) The ratio (H0 / Ht) of the thickness H0 from the surface of the decorative layer to the upper jaw part of the side female body and the total thickness Ht of the flooring is 0.45 to 0.60 (1) ) Or (2) floor heating flooring.

  (4) The flooring material for floor heating according to any one of the above (1) to (3), wherein the laminated wood base material layer is formed of a cloth plywood.

  (5) The flooring material for floor heating according to any one of the above (1) to (4), wherein the number of the laminated wooden base material layers is an even number.

  (6) The floor heating material according to any one of (1) to (5), wherein the male fruit is configured to include at least three layers of the laminated wood base material layer.

  According to the present invention, an object of the present invention is to provide a floor heating floor material in which no jumping occurs in the side side female body of the floor material even in a severe high temperature drying environment assuming a floor heating floor.

The figure which illustrated the shape of the side female body in the flooring for floor heating concerning the present invention The figure which illustrated the shape of the side side male in the flooring for floor heating concerning the present invention Diagram showing test piece in high temperature drying experiment

  Hereinafter, the flooring for floor heating according to the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, a floor heating floor material 10 according to the present invention includes a decorative layer 1 having a thickness of 1 mm or more and a laminated wood base layer 2, and a male fruit 4 and a female fruit 3 around four sides. It is a flooring for floor heating which formed alternately. The laminated wood base layer 2 is formed by alternately laminating the grain directions of a plurality of single plates 2a to 2f, for example. In the figure, the decorative layer 1, the plywood second layer 2b, the plywood fourth layer 2d, and the plywood sixth layer 2f are plate materials whose grain is parallel to the longitudinal direction of the floor material, and the plywood first layer 2a and plywood third The layer 2c and the fifth plywood layer 2e are plate members whose grain is parallel to the floor material transverse direction.

  In the floor heating material 10 according to the present invention, the number of layers of the laminated wood base material layer 2 is 3 between the surface of the decorative layer 1 and the upper jaw portion 3a of the side female 3 (reference numeral H in the drawing). Plate, whose grain is parallel to the floor material longitudinal direction (in the example shown in FIG. 1, the total thickness Hp of the decorative layer 1 and the plywood second layer 2b), and the grain is parallel to the floor material short direction The ratio [Hp / (Hp + Hc)] of the total thickness Hc of the plywood first layer 2a and the plywood third layer 2c in the example shown in FIG. 1 is 0.40 to 0.55.

  When this ratio [Hp / (Hp + Hc)] is less than 0.40 or more than 0.55, the distance from the surface of the decorative layer 1 to the upper jaw portion 3a of the side-side female fruit 3 (symbol H in the figure) In a severe high temperature drying environment that is assumed to be used on a floor heating floor, the floor material jumps up in the female body, but if it is in the range of 0.40 to 0.55, such a jump up It does not occur. The lower limit of the ratio [Hp / (Hp + Hc)] is preferably 0.45, and more preferably 0.47. The upper limit is preferably 0.53.

  The floor heating floor material 10 according to the present invention is not only the balance between the decorative layer 1 surface and the upper jaw portion 3a of the side female 3 (reference numeral H in the figure), but also the balance of the entire floor material, Plates whose grain is parallel to the floor material longitudinal direction (in the example shown in the figure, plywood second layer 2b, plywood fourth layer 2d and plywood sixth layer 2f) and plates whose grain is parallel to the floor material short direction (in the figure In the example shown, it is preferable to adjust the thickness balance of the plywood first layer 2a, the plywood third layer 2c and the plywood fifth layer 2e). Specifically, in the entire flooring material, the ratio of the total thickness Htp of the plate material whose grain is parallel to the longitudinal direction of the flooring material and the total thickness Htp of the plate material whose grain is parallel to the transverse direction of the flooring [Htp / ( Htp + Htc)] is preferably 0.40 to 0.60. The lower limit of the ratio [Htp / (Htp + Htc)] is preferably 0.45, and more preferably 0.48. Further, the upper limit is preferably 0.55, and more preferably 0.52.

  The floor heating floor material 10 according to the present invention preferably adjusts the balance between the total thickness of the floor material and the thickness from the surface of the decorative layer 1 to the upper jaw portion 3a of the side-side female fruit 3, and in particular, the surface of the decorative layer 1 It is preferable that ratio (H0 / Ht) of the thickness H0 from the side jaw female 3 to the upper jaw part 3a and the floor material total thickness Ht is 0.45 to 0.60. The lower limit of the ratio (H0 / Ht) is preferably 0.48. Further, the upper limit is preferably 0.55, and more preferably 0.52.

  Here, it is preferable that the laminated wood base material layer 2 is composed of a so-called cross plywood using a single plate whose surface grain is parallel to the transverse direction of the flooring. This is because, since the thickness of the decorative material is 1.0 mm or more, it is easy to move in the longitudinal direction of the flooring by high temperature drying, and this movement can be easily suppressed by using a cross plywood.

  In particular, it is preferable that the number of laminated wooden base material layers 2 is an even number. The number of laminated layers combined with the decorative layer 2 becomes an odd number. For example, in the example shown in FIG. 1, the decorative layer 1, the plywood second layer 2b, the plywood fourth layer 2d, and the plywood sixth layer 2f The plywood first layer 2a, the plywood third layer 2c and the plywood fifth layer 2e are plate materials whose wood grain is parallel to the floor material short direction, the direction of the wood grain is alternated, warp, etc. This is less likely to occur. Also in this case, the laminated wood base material layer 2 is preferably a cross plywood.

  At this time, one cross plywood having an even number of layers (in the example shown in FIG. 1, all of the plywood first layer 2a to the sixth plywood layer 2f are one cross plywood) may be used. Is a single plate (plywood first layer 2a in the example shown in FIG. 1) that is parallel to the width direction of the flooring, and normal plywood (in the example shown in FIG. 1, plywood second layer 2b to plywood sixth layer 2f is one. A sheet of normal plywood) may be used.

  The male fruit 4 is preferably configured to include at least three layers of the laminated wood base material layer 2 (in the example shown in FIG. 2, the third plywood layer 2c to the fifth plywood layer 2e). This is to ensure the strength of the tip of the male fruit 4.

  In order to confirm the effect of the present invention, a decorative board (tree species: walnut) having a thickness of 2.0 mm is laminated with a laminated wooden substrate layer having a thickness of 10.0 mm (first layer (cross): 1.3 mm, second layer ( Parallel): 1.0 mm, third layer (cross): 2.6 mm, fourth layer (parallel): 1.4 mm, fifth layer (cross): 2.7 mm, sixth layer (parallel): 1.0 mm The upper jaw part of the side female body is formed at a position of 4.2 mm, 4.6 mm, 5.3 mm or 6.0 mm from the surface of the decorative layer 1 on the flooring material affixed to the surface of the decorative layer 1, respectively. 1-4. The laminated wood base layer is a 5-ply plywood bonded with a 1.3 mm cross veneer. The test piece shown in FIG. 3 was cut out from each obtained flooring.

  About each test piece, it puts into the dryer maintained at 60 degreeC for 48 hours, The thickness in four points (two blank parts and two real parts) shown in FIG. The “thickness change amount—the thickness change amount of the blank portion” was taken as the jump amount. The amount of jumping is based on being within ± 0.15 mm. The results are shown in Table 1.

  As shown in Table 1, no. 1 is between the decorative layer surface and the upper jaw part of the side female body, the number of layers of the laminated wood base layer is 2, and the ratio [Hp / (Hp + Hc)] is as high as 0.69. The amount of jumping was 0.19 mm, exceeding the allowable range. No. 2 and 3, the number of layers of the laminated wood base material layer is 3 between the decorative layer surface and the upper jaw part of the side side female fruit, but the ratio [Hp / (Hp + Hc)] is 0.65 and Since it was as high as 0.57, the amount of jumping was 0.18 mm and 0.17 mm, which exceeded the allowable range. In contrast, no. In the present invention, the number of layers of the laminated wood base material layer is 3 between the decorative layer surface and the upper jaw part of the side female body, and the ratio [Hp / (Hp + Hc)] is 0.50 in the present invention. It was within the specified range, and the amount of jump was within an allowable range of 0.12 mm.

  Subsequently, in order to confirm the effect of the directly pasted floor, a laminated board having a thickness of 8.4 mm (tree species: walnut) and a laminated wooden substrate layer having a thickness of 8.4 mm (first layer (cross): 1.5 mm) , Second layer (parallel): 0.7 mm, third layer (cross): 1.5 mm, fourth layer (parallel): 1.2 mm, fifth layer (cross): 1.5 mm, sixth layer (parallel) ): 0.5 mm), and further, the upper jaw part of the side-side female fruit is placed at a position 4.5 mm from the surface of the decorative layer 1 on the floor material on which a 4.5 mm-thick non-woven fabric is attached as a sound insulation layer. Formed, test no. It was set to 5. The laminated wood base layer is a 5-ply plywood bonded with a 1.3 mm cross veneer. A test piece shown in FIG. 3 was cut out from the obtained flooring. Test No. 5, the number of layers of the laminated wood base material layer is 3 between the decorative layer surface and the upper jaw part of the side female body, the ratio [Hp / (Hp + Hc)] is 0.49, and the ratio [Htp / (Htp + Htc)] was 0.46 and the ratio (H0 / Ht) was 0.54, both of which were within the range defined by the present invention, and the amount of jump was within an allowable range of 0.12 mm.

  According to the present invention, an object of the present invention is to provide a floor heating floor material in which no jumping occurs in the side side female body of the floor material even in a severe high temperature drying environment assuming a floor heating floor.

1 decorative layer 2 laminated wood base layer 2a plywood first layer (single plate)
2b Plywood second layer (single plate)
2c Plywood third layer (single plate)
2d plywood fourth layer (single plate)
2e Plywood fifth layer (single plate)
2f Plywood 6th layer (single plate)
3 Female fruit 3a Upper jaw part 4 Male fruit 10 Floor heating floor material according to the present invention

Claims (6)

A floor heating floor material comprising a decorative layer having a thickness of 1 mm or more and a laminated wood base material layer, wherein the male and female berries are alternately formed on the four sides,
Between the decorative layer surface and the upper jaw part of the side female body, the number of layers of the laminated wood base material layer is three, and the total thickness Hp of the plate material whose grain is parallel to the floor material longitudinal direction; A floor heating floor material having a ratio [Hp / (Hp + Hc)] of 0.40 to 0.55 with respect to the total thickness Hc of the plate materials whose grain is parallel to the width direction of the floor material.   In the entire flooring material, the ratio [Htp / (Htp + Htc)] of the total thickness Htp of the plate material whose grain is parallel to the floor material longitudinal direction and the total thickness Htc of the plate material whose grain is parallel to the transverse direction of the floor material is 0. The flooring for floor heating according to claim 1, wherein the flooring is 40 to 0.60. The ratio (H0 / Ht) of the thickness H0 from the decorative layer surface to the upper jaw part of the side female body and the total thickness Ht of the flooring is 0.45 to 0.55. The flooring for floor heating as described.   The flooring material for floor heating according to any one of claims 1 to 3, wherein the laminated wood base material layer is formed of a cloth plywood.   The flooring for floor heating according to any one of claims 1 to 4, wherein the number of laminated wooden base layers is an even number. The flooring material for floor heating according to any one of claims 1 to 5, wherein the male fruit is configured to include at least three layers of the laminated wood base material layer.