JPH0821071A - Composite floor material - Google Patents

Abstract

PURPOSE:To provide a floor board difficult to chamfer by sticking a decorative sheet on the surface of a woody base plate, and sticking a lining sheet on the reverse side. CONSTITUTION:A damping layer 2 is stuck to the surface of a floor board base plate 3. A decorative sheet 1a is stuck to the surface of a woody base plate 1b. A lining sheet 1c is stuck to the reverse side, the surface base plate 1 is laminated and integrated to form a composite material. Even when the surface of the surface base plate 1 is contracted or expanded by the change of water content in the decorative sheet 1a, the lining sheet 1c on the reverse side is similarly contracted and expanded, so that the contraction and expansion on both the surfaces can be well-balanced. Further, even when the woody base plate 1b is contracted or expanded by the water content change, the contraction and expansion is evenly constrained from both the surfaces by the decorative sheet 1a and the lining sheet 1c. Thus, the problem that only the surface base plate 1 is chamfered regardless of the floor board base plate 3.

Description

Detailed Description of the Invention

[0001]

This invention relates to floorboards.

[0002]

2. Description of the Related Art Conventionally, a structure in which a vibration damping layer such as a synthetic resin foam is interposed on the surface of a floor board and the surface boards are laminated and integrated, has a problem of sinking of the floor board and a feeling of walking when a heavy object is placed. There is known a flooring material that solves the problem of poor sound quality and has excellent soundproofing performance. (Actual fair 4-12202, Actual fair 4-523
(See Japanese Patent No. 51)

[0003]

However, in order to form a decorative layer on the surface substrate of such a floorboard, a wooden substrate having a decorative veneer attached to the surface is generally used. However, since the contraction and expansion occur due to the change in the water content of each plate for a long period of time thereafter, and in addition, the damping material between the floor plate substrate and the surface substrate is rich in elasticity, so it is independent of the floor plate substrate. There is a problem that warpage is likely to occur only on the surface substrate on the front side of the damping material.

Particularly, in a floorboard in which only the floorboard substrate is actually processed, the surface board on which the floorboard is applied is only fixed to the floorboard substrate via a damping material. When the surface substrate warps irrelevantly, there is no means for correcting the warp, and it is necessary to replace the entire floorboard.

[0005]

In view of the above problems, the present invention has been accomplished as a result of intensive studies to provide a floor board which is less likely to warp. That is, according to the present invention, the damping layer 2 is formed on the surface of the floor board substrate 3.
In the composite flooring material in which the front substrate 1 is laminated and integrated with the intervening sheet, the decorative substrate 1a is attached to the front face of the front substrate 1 and the backing sheet 1 is attached to the rear face.
The composite flooring material is characterized in that c is attached.

[0006]

In the floorboard of the present invention, the decorative sheet 1a is adhered to the surface of the wooden substrate as the surface substrate 1, and the backing sheet 1c is adhered to the surface substrate 1 so that Although the contraction and expansion occur due to the change in the water content, the backing sheet 1c also contracts and expands on the back surface side, so that the contraction and expansion of the front and back surfaces of the front substrate 1 are balanced, and only the front substrate 1 and the floor board 3 are provided. The problem of irrelevant warpage is solved.

[0007]

EXAMPLE FIG. 1 shows an example of a cross-sectional view of a composite flooring material of the present invention. A damping layer 2 is attached to the surface of a floor board substrate 3 on the side surface of which a fruit for fitting is formed, if necessary. And wooden board 1
Decorative sheet 1a on the front side of b and backing sheet 1 on the back side
It is a composite floor material in which the front substrate 1 to which c is attached is laminated and integrated.

The surface substrate 1 of the present invention is a wood substrate 1.
As the b, for example, a wood board such as a plywood, a wood fiber board, a wood shaving board, and a veneer laminated board can be used. Further, as the decorative sheet 1a to be attached to the front surface side of the wooden substrate 1b, a natural veneer obtained by cutting natural wood, an artificial veneer and a veneer sheet backed with a nonwoven fabric, paper, or a synthetic resin sheet on the veneer is used. A single plate, decorative paper, resin-impregnated decorative paper, synthetic resin decorative sheet, or the like can be used.

As the backing sheet 1c attached to the back surface, a sheet similar to the decorative sheet 1a can be used, and is the same as the decorative sheet 1a in order to balance the front surface side and the back surface side of the front substrate 1. Sheet backing sheet 1
It is preferably used as c.

If different sheets are used, the physical properties of the sheets (water absorption, hygroscopicity, expansion due to moisture absorption,
It is preferable to use sheets having the same or similar shrinkage, shrinkage due to drying, and tensile strength.

When the decorative veneer having a constant fiber direction is used as the decorative sheet 1a, the amount of shrinkage and expansion caused by the change in the water content in the direction parallel to the fiber direction of the veneer and the direction perpendicular to the direction of the veneer is greatly different. It has the property of

Therefore, the backing sheet 1c also uses a backing veneer having the same structure and the same thickness as that of the decorative veneer on the surface side, and the fiber direction of the decorative veneer on the surface side and the fiber direction of the backing veneer are used. By sticking so that they are parallel to each other, the amount and direction of contraction and expansion due to the change in water content of the front side veneer 1a and the back side veneer 1c become equal and the warp of the front substrate 1 is prevented. can do.

Further, the decorative sheet 1a and the backing sheet 1c are thinner than the wooden substrate 1b, preferably 1/4 or less in thickness. If a thicker sheet is used, the amount of contraction and expansion of the decorative sheet 1a and the backing sheet 1c greatly affects the warp, and if the amount of contraction and expansion is slightly different between the front and back surfaces, the front substrate 1 may warp. is there.

The surface substrate 1 is preferably thinner than the floor plate substrate 3. This is because when the surface substrate 1 is made thin, the rigidity of the surface substrate 1 is reduced, and when the surface of the floor board is impacted, the surface substrate 1 is deformed to absorb the impact and the soundproof performance is improved. This is to improve.

As the floor board 3 of the present invention, wood boards such as plywood, wood fiber board, wood shaving board, and single laminated board can be used. Further, the side surface of the floor plate substrate 3 can be subjected to actual processing if necessary.

When the composite floor material of the present invention is directly attached to a concrete foundation or the like, the actual processing position is such that the side surface of only the floor board substrate 3 or the floor board substrate 3, the damping layer 2 and the surface board 1 is subjected to the actual processing. Can be given.

On the other hand, in the case of fixing the nails to the joists on the surface of the male part or the surface of the lower convex part of the female formed on the side surface of the floorboard in the wooden house, only the floorboard substrate 3 is actually processed. As a result, even after the floorboard substrate 3 is fixed to the joist by nailing, the surface side portion including the damping layer 2 can vibrate independently of the floorboard substrate 3, and the impact applied to the floorboard surface can be reduced. It can be absorbed by the surface substrate 1 and the vibration damping layer 2 and has excellent soundproofing performance.

In addition, when the floorboard substrate 3 is directly attached to a concrete base, the rigidity of the floorboard substrate 3 is lowered by forming a back groove on the backside of the floorboard substrate 3, and the impact applied to the surface of the floorboard substrate 3 is changed by the deformation of the floorboard substrate 3. Can also be absorbed, and the soundproof performance can be improved. Further, by forming the back groove, the plasticity of the floor board 3 is enhanced, and the floor board can be easily constructed along the unevenness of the construction base surface.

As the damping layer 2 of the present invention, a stretchable impact sheet such as a synthetic resin sheet and a rubber sheet, or a foamed material thereof, or a nonwoven fabric can be used.
By providing the damping layer 2 made of such an impact sheet, it is possible to prevent the impact energy applied to the floorboard surface from being absorbed by contraction deformation of the damping layer and being transmitted to the lower layer.

Further, as shown in FIG. 2, the impact sheet 2a and a synthetic resin or rubber such as vinyl chloride as a main component and metal powders such as lead and iron oxide and inorganic substance powders such as calcium carbonate and talc are contained. The vibration damping layer 2 can be formed by laminating the sound insulating sheet 2b having the sound insulating property improved by mixing the density substance powder.

By combining the impact sheet 2a and the sound insulating sheet 2b as described above, the shock absorbing sheet 2a of the damping layer 2 is absorbed by contraction deformation, and then the sound insulating sheet 2b.
It is possible to prevent the transmission to the lower layer by the shielding function by.

When a cushioning sheet is used as the damping layer 2, the cushioning sheet is used as the floor board 3 and the surface board 1.
It is preferable to use a thinner one.

This is because, particularly when the fruit is formed only by the floor board 3, the bonding with the adjacent floor materials is performed by the fruit, and the portions on the surface side of the fruit are bound to each other between the adjacent floor materials. Instead, it is in a state of free movement. In such a state, if the thickness of the cushioning sheet that absorbs the impact due to the contracting deformation is too large, when a heavy object is placed, the cushioning sheet contracts and deforms easily to cause a step between the adjacent floor materials, and thus the caster This is because there is a problem that such items are easily caught.

Further, as shown in FIG. 3, a cushioning material 4 such as a synthetic resin sheet, a rubber sheet or a foam thereof, or a non-woven fabric is attached to the back surface of the composite flooring material of the present invention so that the damping layer 2 is formed. In addition to absorbing the shock, the shock absorption due to the similar contraction deformation is also performed in the lowermost layer, and the soundproofing performance can be improved. Further, even if the construction base surface is uneven, the cushioning material 4 is deformed along this unevenness, so that a flat floor surface absorbing the unevenness can be obtained.

[0025]

In the composite flooring material of the present invention, the decorative sheet 1a is attached to the front surface side of the wooden board 1b constituting the floor board 3, and the backing sheet 1c is attached to the back surface thereof. Although contraction / expansion occurs due to a change in the water content of the decorative sheet 1a on the front surface side of the front substrate 1, the backing sheet 1c also contracts / expands on the back surface side, so that the balance of contraction / expansion on the front and back surfaces of the front substrate 1 is Can be taken.

Further, even if the wooden substrate 1b contracts and expands due to a change in water content, the decorative sheet 1a and the backing sheet 1c evenly restrain the contraction and expansion from the front and back surfaces, so that only the front substrate 1 is independent of the floor board 3. The problem of warpage is solved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a composite floorboard of the present invention,

FIG. 2 is a cushioning sheet 2a and a sound insulating sheet 2 as damping materials.
The case of combining with b is shown.

FIG. 3 is a cross-sectional view when a cushioning material 4 is attached to the back surface,

[Explanation of symbols]

1: surface substrate, 1a: decorative sheet, 1b: wood substrate, 1
c: backing sheet, 2: damping layer, 2a: buffer sheet, 2
b: sound insulation sheet, 3: floor board, 4: cushioning material.

Claims (4)

[Claims] 1. A composite flooring material in which a surface board is laminated and integrated on the surface of a floor board board with a damping layer interposed, and a decorative sheet is attached to the surface board of the surface board on the surface side of the wood board. A composite flooring material having a backing sheet attached to the back side. 2. A front veneer is a wood veneer, and a decorative veneer is attached as a decorative sheet on the front side of the substrate, and a backing veneer is a backing sheet on the back side so that the fiber direction is parallel to the veneer. 3. The method according to claim 1, wherein is attached.
The described composite flooring. 3. The composite flooring material according to claim 1, wherein the damping layer is a cushioning sheet having a cushioning function. 4. The damping layer is composed of a cushioning sheet having a cushioning function and a sound insulating sheet to which high-density substance powder is added.
And the composite flooring as described in 2.