JP2014066126A - Wooden floor material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wooden floor material for direct flooring, which is excellent in sound insulating property and rigidity, and which can suppress warping, dimensional variations and the like even by using a decorative material with a thickness of 1 mm or more.SOLUTION: In a wooden floor material, a woody decorative material 1 with a thickness of 1.0-3.0 mm, a veneer 2 with a thickness of 1.0-3.0 mm, the fiber direction of which is orthogonal to that of the woody decorative material 1, plywood 3 with a thickness of 5.0-12 mm, and a buffer material 4 with a thickness of 1.5-10 mm are stacked in order and joined together. The plywood 3 is divided into a plurality of pieces by a back groove 11 orthogonal to the longitudinal direction of the wooden floor material.

Description

  The present invention relates to a wooden flooring, and more particularly to a wooden flooring suitable as a directly attached floor for a building.

  As a flooring used in detached houses, condominiums and other buildings, the surface of a wooden substrate made of plywood, MDF, etc., or a thin plate of famous wood on the surface of a wooden substrate made by stacking these wooden substrates , Called “decorative material”) is often used.

  Wood flooring with decorative material is made of plywood that has less expansion and contraction due to moisture than solid wood, and the surface is coated with various paints to prevent moisture from entering the interior. Therefore, it is used in many construction sites because it is easy to handle with little warpage in the usage environment after construction.

  Cosmetic materials are roughly classified into thin materials having a thickness of about 0.2 to 0.6 mm and relatively thick materials having a thickness of about 0.7 to 3.0 mm. A thin decorative material is manufactured by cutting and combining a plurality of wood blocks bonded together with a slicer. The board manufactured by such a manufacturing method is called a veneer. On the other hand, thick decorative materials are often manufactured by cutting wood with a band saw or the like in addition to using a veneer. A board manufactured by such a manufacturing method is called a saw board.

  A thin decorative material has various advantages such as a small change in shape due to moisture, high production efficiency because it is a veneer, and easy selection of parts free from defects such as nodes. However, reflecting recent changes in consumer preferences regarding housing, there is an increasing demand for wooden flooring with a relatively thick decorative material having the same wood texture as solid wood.

  In recent years, a method of directly sticking a wooden floor material to a floor base such as a concrete slab has been adopted. From the viewpoint of soundproofing, a cushioning material is often bonded to the lower surface of the directly attached wooden flooring. In order to further improve the soundproofing property, a soundproofing flooring material having a structure in which a groove is provided on the back side of the flooring material has been proposed.

  Patent Document 1 discloses a soundproof floor material in which a decorative material, an MDF, a plywood, and a buffer material are sequentially laminated and integrated, and kerfs are provided from the back surface of the plywood to the MDF.

  In Patent Document 2, an odd number of three or more single plates are laminated, a decorative sheet is laminated on the front surface of a wood plywood having a groove processing of a predetermined depth on the back surface, and on the back surface A soundproof floor material in which cushioning materials are laminated is disclosed.

JP-A-8-14489 JP2008-240416

  The soundproof floor material disclosed in Patent Document 1 is provided with a flexible MDF at the bottom of the kerf, thereby preventing cracks that may occur at the bottom of the groove and suppressing the generation of tapping and squeaking noises. It is. However, since MDF has a large warp and expansion / contraction due to changes in humidity, the deformation over time is large, and it cannot be used particularly as a flooring for floor heating.

  The soundproof flooring disclosed in Patent Document 2 is provided with a back groove on the back surface of the wood plywood, and by limiting the thickness of the surface layer veneer on the decorative sheet side of the plywood to a specific range, It is said that it is a deformation, and in particular, it is possible to suppress an angle warp deformation in which the decorative sheet side is convex in the longitudinal direction. However, when a wooden decorative material with a thickness of 1 to 2 mm is used instead of a thin decorative sheet on the surface of the floor material, the floor material warps in the short direction and prevents deformation over time. Can not be.

  Therefore, the present invention provides a directly attached wooden flooring that is excellent in soundproofing and rigidity, and that can be warped even when a decorative material having a thickness of 1 mm or more is used, and that can prevent dimensional changes and the like. With the goal.

  This invention is made | formed in order to solve said subject, and makes a summary the following wooden flooring.

(1) a wooden decorative material having a thickness of 1.0 to 3.0 mm;
A veneer having a thickness of 1.0 to 3.0 mm, and the wooden decorative material and the fiber direction are orthogonal to each other;
Plywood with a thickness of 5.0-12 mm;
It is a wooden floor material in which a buffer material having a thickness of 1.5 to 10 mm is sequentially laminated and joined,
The wooden flooring, wherein the plywood is divided into a plurality of back grooves perpendicular to the longitudinal direction of the wooden flooring.

(2) The wooden floor according to (1) above, wherein a thickness t ₁ (mm) of the wooden decorative material and a thickness t ₂ (mm) of the veneer satisfy the following formula (i): Wood.
0.5 ≦ t ₂ / t ₁ ≦ 2 (i)

  (3) The wooden flooring according to (1) or (2), wherein a plywood having an even number of layers and four or more layers is used instead of the single plate and the plywood.

  (4) The wooden flooring according to any one of (1) to (3), wherein the cushioning material is a nonwoven fabric.

  According to the present invention, since a relatively thick decorative material having a wood texture similar to that of a solid material is used, not only is it excellent in design, but also excellent in soundproofing and rigidity, and further, warpage in the length direction and width direction, In addition, it is possible to obtain a wooden floor material capable of suppressing dimensional changes. Therefore, the wooden flooring of the present invention is particularly suitable as a directly attached floor for floor heating in which the humidity changes drastically.

It is sectional drawing of the wooden flooring which concerns on this invention.

  FIG. 1 is a cross-sectional view of a wooden floor according to the present invention. The wood floor material of the present invention is obtained by sequentially laminating and joining a wood decorative material 1, a veneer 2, a plywood 3 and a cushioning material 4. Details of each component will be described below.

  The wooden decorative material 1 can use various veneer veneers or saw boards. If the thickness of the wooden decorative material is less than 1.0 mm, it is difficult to obtain the same wood texture as that of the solid wood. On the other hand, if the thickness exceeds 3.0 mm, it is not preferable from a cost standpoint, and there is a problem of deformation such as warpage. Occurs. Therefore, the thickness of the wooden decorative material is set to 1.0 to 3.0 mm. The thickness of the woody decorative material is preferably 1.5 mm or more, and preferably 2.0 mm or less.

  The veneer 2 is joined to the woody decorative material 1 so that the fiber directions are orthogonal. Thereby, warpage, expansion, contraction, etc. can be suppressed. Moreover, there is no restriction | limiting in particular about a tree species, For example, Lawan, Falkata, Eucalyptus, Chamelere, rubber | gum, cedar, a larch etc. can be used. If the thickness of the veneer is less than 1.0 mm, desired rigidity cannot be obtained. On the other hand, if the thickness exceeds 3.0 mm, it is not preferable from the viewpoint of cost, and deformation problems such as warpage occur. Therefore, the thickness of a single plate shall be 1.0-3.0 mm. The thickness of the single plate is preferably 1.5 mm or more, and preferably 2.0 mm or less. In the present invention, the veneer includes a veneer and a saw board.

In order to suppress warping, expansion, contraction, etc. of the flooring material, it is preferable that the thicknesses of the wooden decorative material 1 and the veneer 2 satisfy the following formula (i).
0.5 ≦ t ₂ / t ₁ ≦ 2 (i)
However, the meaning of each symbol in the above formula is as follows.
t ₁ : Thickness (mm) of the wooden decorative material
t ₂ : Thickness of single plate (mm)

The thickness of the woody decorative material 1 and the veneer 2 is preferably about the same, and the value of t ₂ / t ₁ is more preferably 0.7 or more, and further preferably 0.9 or more. Further, the value of t ₂ / t ₁ is more preferably 1.5 or less, and even more preferably 1.1 or less.

  The tree species of the plywood 3 is not particularly limited as in the case of the veneer 2, and Lawan, Falcata, Eucalyptus, Chamelere, rubber, cedar, larch and the like can be used. The plywood 3 may be the same tree species as the veneer 2. If the thickness of the plywood is less than 5.0 mm, the rigidity of the flooring becomes insufficient and warping tends to occur. On the other hand, when it exceeds 12 mm, it is not preferable from a cost side. Therefore, the thickness of the plywood is set to 5.0 to 12 mm.

  As shown in FIG. 1, the plywood 3 is divided into a plurality by a back groove 11 orthogonal to the longitudinal direction of the wooden floor material in order to obtain a predetermined soundproof performance. Although there is no restriction | limiting in particular about the method of processing the back groove | channel 11, After sticking the plywood 3 to the veneer 2, or after laminating | stacking and joining the said woody decorative material 1, the veneer 2, and the plywood 3 in order, Grooves can be machined from the back side.

  The back groove 11 is preferably grooved so as to reach the single plate 2 so that the plywood 3 is completely divided. At this time, in order to obtain good soundproofing performance, it is desirable that the back groove 11 reaches the single plate 2 and the depth of the groove in the single plate portion is 0.5 mm or more. However, in order to ensure rigidity, it is desirable that the veneer 2 is not completely divided, and the remaining margin of the veneer 2 after grooving, that is, the length from the groove bottom to the surface of the veneer 2 is , 0.5 mm or more is desirable.

  Further, the length from the groove bottom to the surface of the wooden decorative material 1 is preferably 1.5 mm or more, and more preferably 2.5 mm or more. On the other hand, the length from the groove bottom to the surface of the wooden decorative material 1 is preferably 5.5 mm or less. In addition, although there is no restriction | limiting in particular about the width | variety of the back groove | channel 11, it is desirable to set it as 1-3 mm.

  Usually, the plywood 3 has an odd number of layers and three or more layers. Although there is no restriction | limiting in particular about the number of layers of the plywood 3, It is preferable to use the plywood which consists of five layers. The single plate 2 and the plywood 3 may be attached in advance, or instead of the single plate 2 and the plywood 3, a plywood having an even number of layers and four or more layers may be used.

  When a plywood having an even number of layers and four or more layers is used, the first surface layer corresponds to the single plate 2 and the remaining layers correspond to the plywood 3. Therefore, the first layer of the plywood having an even number of layers and four or more layers is one in which the fiber direction is orthogonal to the wooden decorative material 1 and has a thickness of 1.0 to 3.0 mm. The total thickness of the layers is 5.0-12 mm. Further, it is necessary to perform grooving so as to leave the first layer and completely divide the remaining layer.

  By bonding the veneer 2 and the plywood 3 below the woody decorative material 1 or the plywood having an even number of layers and four or more layers instead of them, not only the length warp but also the width warp and dimensional change are effective. Can be suppressed.

  Although there is no restriction | limiting in particular about the material of the buffer material 4, Non-woven fabrics, such as resin foams, such as urethane, polyethylene, a polypropylene, or polyester, can be used. From the viewpoint of soundproofing performance, it is preferable to use a non-woven fabric as a cushioning material. If the thickness of the cushioning material is less than 1.5 mm, the familiarity with the underlying unevenness (uneven surface) is insufficient. On the other hand, if the thickness exceeds 10 mm, the floor rigidity of the floor deteriorates and the feeling of walking worsens. Therefore, the thickness of the buffer material is 1.5 to 10 mm. The thickness of the buffer material is preferably 4.0 mm or more, and preferably 6.0 mm or less.

  Although there is no restriction | limiting in particular about the magnitude | size of a wooden flooring, For example, the width | variety of 145,150,300,303mm and length 909,1818mm can be used. Moreover, the wood flooring which concerns on this invention can be provided with the fruit 5 for joining flooring. In this case, the actual 5 is preferably provided on the plywood 3.

  EXAMPLES Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to these Examples.

  The 1.5mm, 1.8mm and 2.0mm thick wooden decorative materials are bonded to the lauan veneer whose fiber direction is orthogonal and the 2.7mm thick MDF below the 2.0mm thick wooden decorative materials. Further, a lauan plywood having a thickness of 5.4 mm was joined below. The Lauan plywood has 5 layers, and the thickness of each layer was 0.7 mm, 1.4 mm, 1.2 mm, 1.4 mm, 1.2 mm, and 0.7 mm from the upper layer to the lower layer.

  Then, the back groove was processed in the direction orthogonal to the longitudinal direction of the flooring from the back side of the lauan plywood to the lauan single plate or MDF, and the plywood was completely divided into a plurality of pieces. About the depth of a back groove, it adjusted so that the back groove remaining allowance may be set to 2.7 mm about all the flooring materials, and the width | variety of a groove | channel is 1.5 mm. Furthermore, a buffer material having a thickness of 4.5 mm was joined below. A polyester nonwoven fabric was used as the buffer material. The size of the wooden flooring was 145 mm wide and 909 mm long.

  These wood floors were measured for warpage and dimensional change in a dry and hygroscopic environment. As for warpage, each of width warpage and length warpage was measured. Moreover, also about the dimensional change, each of the width direction and the length direction was measured. The test in a dry environment was performed at a temperature of 40 ° C. and a humidity of 30%, and the test in a hygroscopic environment was performed at a temperature of 30 ° C. and a humidity of 90% for 2 weeks. In addition, the test was performed in a state in which the wooden floor material was stacked through a crosspiece without being restrained. The measurement results of warpage and dimensional change are shown in Tables 1 and 2, respectively.

  About the measured value of the curvature shown in Table 1, the peak curvature which becomes convex on the surface layer side was expressed by a positive value, and the valley curvature which becomes concave on the surface layer side was expressed by a negative value. Moreover, the measurement result of the dimensional change was the dimensional change rate (% /%) per 1% of the moisture content, and the expansion was expressed as a positive value and the contraction was expressed as a negative value. In the drying test, the moisture content changed from 11% to 5%, and in the moisture absorption test, the moisture content changed from 11% to 15%.

  As shown in Tables 1 and 2, the wooden flooring according to the present invention showed good results with little change in warpage and dimensional change in each of the width direction and the length direction. Also, the flooring using a lauan veneer with a thickness of 2.0 mm, which is the same as the thickness of the wooden decorative material, is more warped and dimensional changes than the flooring using lauan veneers with a thickness of 1.5 mm and 1.8 mm. It can be seen that this can be suppressed.

  On the other hand, when MDF is bonded to the lower side of the wooden decorative material, in the measurement of warpage, although there was little warpage in the drying test, in the moisture absorption test, significant changes were observed in both width warpage and length warpage, It became a result inferior compared with the wooden flooring which concerns on this invention. Further, in the measurement of the dimensional change, although no significant change was observed in the length direction, significant changes occurred in both the drying test and the moisture absorption test in the width direction, which is inferior to the wooden flooring according to the present invention. As a result.

  From the above results, in the flooring according to the present invention, by arranging the lauan veneer whose fiber direction is orthogonal to the wooden decorative material between the wooden decorative material and the plywood, the dimensional change in the width direction is particularly effective. It is clear that it is suppressed.

  A wood decorative material having a thickness of 2.0 mm, a lauan single plate having a thickness of 1.5 mm, and a lauan plywood having a thickness of 5.4 mm were sequentially laminated and joined. The Lauan plywood has 5 layers, and the thickness of each layer was 0.7 mm, 1.4 mm, 1.2 mm, 1.4 mm, 1.2 mm, and 0.7 mm from the upper layer to the lower layer.

  Then, the back groove was processed in the direction orthogonal to the longitudinal direction of the flooring from the back side of the lauan plywood to the lauan single plate, and the plywood was completely divided into a plurality of pieces. The depth of the back groove is adjusted so that the back groove remaining allowance is 2.7 mm, and the width of the groove is 1.5 mm. Furthermore, a buffer material having a thickness of 4.5 mm was joined below. The size of the wooden flooring was 145 mm wide and 909 mm long.

  The soundproofing performance was evaluated for the above wooden flooring. As the buffer material, three types of polyester nonwoven fabrics were used. The soundproofing performance was evaluated based on JIS A 1440-1. Table 3 shows the measurement results.

  From Table 3, when any cushioning material is used, the reduction amount exceeds the reference value of ΔLL-4 at all frequencies, and the wooden flooring according to the present invention has a soundproofing performance equivalent to ΔLL-4. I understand.

  According to the present invention, since a relatively thick decorative material having a wood texture similar to that of a solid material is used, not only is it excellent in design, but also excellent in soundproofing and rigidity, and further, warpage in the length direction and width direction, In addition, it is possible to obtain a wooden floor material capable of suppressing dimensional changes. Therefore, the wooden flooring of the present invention is particularly suitable as a directly attached floor for floor heating in which the humidity changes drastically.

1. Woody decorative material2. Single plate 3. Plywood 4. 4. Buffer material Actually 11. Back groove

Claims (4)

A wooden decorative material having a thickness of 1.0 to 3.0 mm;
A veneer having a thickness of 1.0 to 3.0 mm, and the wooden decorative material and the fiber direction are orthogonal to each other;
Plywood with a thickness of 5.0-12 mm;
It is a wooden floor material in which a buffer material having a thickness of 1.5 to 10 mm is sequentially laminated and joined,
The wooden flooring, wherein the plywood is divided into a plurality of back grooves perpendicular to the longitudinal direction of the wooden flooring. _2. The wooden flooring according to claim 1, wherein a thickness t ₁ (mm) of the wooden decorative material and a thickness t ₂ (mm) of the veneer satisfy the following expression (i).
0.5 ≦ t ₂ / t ₁ ≦ 2 (i)   The wood flooring according to claim 1 or 2, wherein a plywood having an even number of layers and four or more layers is used instead of the single plate and the plywood. The wooden flooring material according to any one of claims 1 to 3, wherein the cushioning material is a nonwoven fabric.