JP2000226931A - Crack preventive floor material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a crack from arising on the surface of the floor material in which a rate of water content is generated partially by interposing non-woven fabric having as a main constituent element inorganic fiber, particularly, glass fiber between a wooden base material and a natural wood decorative veneer. SOLUTION: A floor material 1 is constituted of a main element of non-woven fabric 4 of main components of a wooden base material, a thin natural wooden decorative veneers 3 for decorative finish and glass fiber interposed therebetween. The floor material 1 is used as a laminate adhered itnegrally by a proper adhesive in a state where the non-woven fabric 4 is interposed between the thin natural wooden decorative veneer 3 and the wooden base material 2. In addition, glass fiber is 50% or more of the total fiber weight in the interposed glass fiber non-woven fabric 4, and the weight of the non- woven fabric is preferably 15-50 g/m2. Thereby the crack of the surface in a water-content rate difference caused by the time of a place exposed on strong direct sunlight, and use or the like of a hot carpet and partially occurring can be prevented comparatively inexpensively and easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flooring for preventing cracking, and more particularly to a wooden flooring for preventing cracking for a long period of time when installed on a floor of a building such as a house. .

[0002]

2. Description of the Related Art Conventionally, wooden floor coverings finished with a thin veneer made of natural wood have been widely used mainly in houses, but in areas where sunlight is strong and illuminated for a long time, areas where hot carpets are laid. Alternatively, there is a problem that fine drying cracks are generated on the surface of the flooring material where a difference in moisture content occurs partially, such as a portion provided with floor heating, and this significantly impairs the commercial value of the flooring material.

Therefore, as a relatively inexpensive method for preventing cracking, paper or non-woven fabric mainly composed of natural fibers such as Japanese paper (pulp) or synthetic resin fibers such as polyester between a natural wood thin plate and a wood substrate is used. Has been implemented. However, in a living environment where the difference in moisture content is severe, such as underfloor heating, it is not enough to prevent drying cracks. In addition, instead of wood base material, MDF
There is also a method using a medium-density fiber board (MDF), but MDF absorbs moisture and the like once and does not return to its original state when it expands, so floor noise and thrusting between floor boards are permanent. There is a drawback that it may cause a problem.

Therefore, recently, a method of attaching a natural wood thin plate for cosmetics so as to be substantially perpendicular to the fiber direction on the surface of the plywood substrate (Patent Document 2)
No. 603682) and a method of sandwiching a thin veneer between a plywood base plate (base material) and a natural wood thin plate as shown in FIGS. 257
No. 566, draft registration 2530572, patent 27177
No. 53) has also been proposed, but there is a problem that the production cost is relatively high because thin veneers are usually natural wood, and it is difficult to obtain the same shape, and plywood of a special shape must be procured. . Therefore, development of an inexpensive wood-based anti-drying flooring material that prevents fine drying cracks on the flooring surface has been demanded.

[0005]

In view of the current situation,
An object of the present invention is to provide a wooden flooring material which is relatively inexpensive and prevents drying cracks on the flooring surface where a difference in moisture content occurs partially in places exposed to strong direct sunlight or use of hot carpets. The purpose is to provide.

[0006]

The present inventor has focused on the fact that dry cracking occurs due to the difference between the dimensional change rate of the wooden base material and the dimensional change rate of the natural wood decorative veneer. The above problem can be solved by interposing a nonwoven fabric mainly composed of inorganic fibers, especially glass fibers, instead of the conventionally used Japanese paper or organic fibers, between the wooden base material and the decorative veneer of natural wood. And completed the present invention.

That is, according to the present invention, in a flooring material whose wooden base material has a decorative surface finished with a thin wooden veneer veneer, a nonwoven fabric containing glass fibers is interposed between the thin veneer veneer veneer and the wooden base material. It is a floor material that prevents cracking. In the nonwoven fabric described above, the glass fiber content is 50% or more of the total amount of fibers, and the basis weight of the nonwoven fabric is 15 g / m ^2.
Those having a weight of ５０50 g / m ² are particularly preferred.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the structure of the flooring material of the present invention, and FIG. 2 is a sectional view of the flooring material showing an assembled state thereof. FIGS. 3 and 4 are a perspective view and a sectional view of a floor material in an assembled state, in which a thin veneer is sandwiched between a wooden base material and a natural wood thin plate in a direction substantially perpendicular to the direction of these fibers.

First, referring to FIG. 1, the construction of the flooring material 1 of the present invention comprises a wooden base material 2 and a thin natural wood decorative veneer 3 for decorative finishing.
And a nonwoven fabric 4 containing glass fiber as a main component interposed between them as main components. As shown in the cross-sectional view of FIG. 2, the flooring material 1 composed of these main components is provided with an appropriate adhesive with a nonwoven fabric 4 interposed between a thin veneer veneer veneer 3 and a wooden base material 2. It is used as a laminated body bonded together. In addition, on the floor side (back side) of the wooden base material 2, if necessary, a gas-permeable cushioning material or the like having a sound absorbing effect by absorbing impact from the floor is integrally bonded with an appropriate adhesive. Is also good. In this case, a non-woven fabric made of synthetic resin fibers such as polypropylene and polyester is preferable as the cushioning material.

Here, the wood base material 2 is a floor base generally used for floor materials, and is usually made of a thermosetting adhesive such as urea resin, melamine resin, phenol resin, etc. Wood materials such as plywood, hard board, and particle board, which are obtained by applying a condensate as a main component) together with a curing agent to an adhesive surface of the material and curing and adhering under heat and pressure. Of these, in particular, a thin plate or veneer peeled off from wood is laminated with three or more layers, preferably four to five layers, so that the grain is perpendicular to each other, and heated to a required thickness. Pressure bonded plywood is preferred.

The thin natural wood decorative veneer 3 is preferably a thin one having a thickness of 0.5 mm or less, which is generally used, such as a rotary veneer of natural wood and a sliced veneer. For example,
A single plate such as oak, hippo, sen, etc. having a thickness of about 0.3 mm may be used. In addition, the natural wood decorative veneer may be resin-impregnated wood (WPC: Wood-Plastic-Composite) impregnated or coated with a polyurethane resin, an amino alkyd resin, a polyester resin or the like depending on the use. In the present invention, a suitable adhesive is applied with the glass fiber nonwoven fabric 4 interposed between the decorative wooden veneer 3 and the wooden base material 2, and integrated by a hot press or the like.

Here, as the glass fiber nonwoven fabric 4 to be interposed, the glass fiber is 50% or more of the total fiber amount, and
The nonwoven fabric preferably has a basis weight of 15 g / m ² or more and 50 g / m ² or less. In addition, glass fiber is fiberized by melt spinning with silica as a main component, E glass fiber,
It also includes silica fibers, ceramic fibers, and the like. Here, if the glass fiber content is 50% or less of the total amount of the fiber, the performance of the glass fiber stable against moisture and heat cannot be sufficiently brought out. The blending ratio of the glass fibers may be 100%, but pulp fibers, for example, may be blended to make the nonwoven fabric easy to handle. If the basis weight of the glass fiber non-woven fabric is 15 g / m ² or less, it is difficult to manufacture the non-woven fabric, and it is difficult to obtain the effect of suppressing dry cracking. on the other hand,
If it is 50 g / m ² or more, the adhesive for application easily penetrates into the nonwoven fabric, so that the laminating operation becomes complicated and the effect of preventing dry cracking is not necessarily increased.

Further, the thickness of the glass fiber of the nonwoven fabric is 5
２０20 μm, preferably 8-13 μm, and the length is approximately
One-half inch to about one inch is easy to manufacture as a nonwoven fabric and is the most suitable for the purpose of the present invention. Here, if the diameter of the glass fiber is too large, the effect of preventing cracking is low, and if it is too small, it becomes difficult to handle. Note that the glass fiber nonwoven fabric 4 may use a binder resin for bonding the fibers so that the fibers do not fall apart at the manufacturing stage, but the nonwoven fabric of the present invention is easy to handle if these binder resins are added as desired. It is. Generally, a thermoplastic resin-based adhesive such as an acrylic resin or a PVA resin is preferably used as the binder resin.

As the adhesive for adhering the wood substrate 2 to the glass fiber nonwoven fabric 4 and the decorative veneer for natural wood 3, for example, a thermosetting resin adhesive containing a resin such as melamine or phenol as a main component can be used. Is JAS ordinary plywood standard 2
It is preferable to use an adhesive having at least one kind and desirably at least one kind of durability in order to prevent the floor material from cracking. When an adhesive having a performance lower than this is used, even if the nonwoven fabric is used, there is no durability such as water resistance, and it is difficult to obtain the effect of preventing cracking.

The anti-drying flooring material 1 according to the present invention comprises a nonwoven fabric 4 mainly composed of a specific glass fiber which is stable against moisture and heat interposed between a wooden base material 2 and a natural wood decorative veneer 3. In the state where it was made, epoxy used conventionally is appropriately applied to the floor base (inorganic materials such as concrete and mortar, wood materials such as plywood and particle board, and aluminum materials such as aluminum foil used for floor heating mat surfaces, etc.). A thermosetting resin adhesive such as a polyurethane-based or polyurethane-based resin is directly applied and used as an adhesive for construction. In this case, there is an effect of preventing the surface from being cracked, which is said to be caused because the dimensional change rate of the wooden base material and the natural wood decorative veneer differ due to the heat insulating effect of the nonwoven fabric.

[0016]

EXAMPLES Specific examples of the present invention will be described below.

Example 1 A wood veneer having a thickness of 9 mm and a wood veneer having a thickness of 12 mm and a wooden veneer veneer having a thickness of 0.3 mm and a surface coated with a polyester resin coated with a polyester resin.
The basis weight consisting of glass fiber of 1/2 inch length in μm 30
A floor material shown in FIG. 2 was obtained with a glass fiber nonwoven fabric of g / m ² interposed. Incidentally, an adhesive equivalent to JAS1 was used as an adhesive in which these were laminated.

Example 2 Glass fiber non-woven fabric is 60% glass fiber and 40% pulp
A flooring material was obtained under the same conditions as in Example 1 except that a material having a basis weight of 30 g / m ² was used.

Comparative Example 1 A flooring material was obtained under the same conditions as in Example 1 except that a non-woven fabric consisting only of 3-denier 3-inch long polyester fiber was used.

Comparative Example 2 The same procedure as in Example 1 was carried out except that the same five-layered 12 mm thick woody base material and a natural wood thin plate were attached so that the fiber directions were perpendicular to each other as shown in FIGS. A floor material was obtained under the same conditions as in Example 1. Table 1 summarizes the results of the cold repetition test according to the JAS special plywood standard, the workability, and the comprehensive evaluation results for the floor materials of the above Examples and Comparative Examples.

[0021]

[Table 1]

[0022]

As described above, the present invention relates to a flooring material in which a wooden substrate is decoratively finished with a decorative veneer made of natural wood. By being interposed, it is said that it is relatively inexpensive and can easily prevent the surface from being cracked due to a partial difference in moisture content that occurs when exposed to strong direct sunlight or when using a hot carpet. There are advantages.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a flooring material of the present invention.

FIG. 2 is a sectional view of a floor material according to the present invention.

FIG. 3 is a perspective view of a floor material configuration showing an example of the related art.

FIG. 4 is a cross-sectional view of a floor material showing an example of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flooring material 2 Wood base material 3 Natural wood decorative veneer 4 Glass fiber nonwoven fabric 5 Orthogonally applied decorative thin plate for reinforcement

Claims (2)

[Claims] (1) A floor material having a wooden base material whose surface is decoratively finished with a thin natural wood decorative veneer, wherein a nonwoven fabric containing glass fibers is interposed between the thin natural wood decorative veneer and the wooden base material. Dry crack prevention flooring material. 2. The nonwoven fabric has a glass fiber content of 50% or more of the total amount of fibers, and the basis weight of the nonwoven fabric is 15 g / m ^{2 to} 50 g / m ^2.
The floor material for preventing cracking according to claim 1, wherein