JP2686111B2 - Heating floor material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

TECHNICAL FIELD The present invention relates to a floor material for a heated floor that is heated from the floor surface.

[Prior art]

A heating floor in which a heating element such as a hot water pipe or an electric heater is passed through the floor to heat the floor is becoming popular because of its comfort. Even in such a heating floor, when a floor material is formed on wood, the surface of the floor material is generally formed of a wood veneer.

[Problems to be solved by the invention]

However, the wood veneer has a strong tensile strength in the direction parallel to the grain direction (tissue), but the tensile strength in the direction perpendicular to this is extremely weak. In the case of, the temperature difference that acts on the veneer between when the heating is used and when the heating is not used is large, which causes repeated expansion and contraction of the veneer, causing cracks in the veneer in the weaker direction. There was a problem that it was easy. For this reason, WPC treatment is performed to increase the strength of the veneer plate.However, WPC treatment requires a lot of man-hours, and since WPC treatment is performed by injecting resin, it does not look like plastic. It will have a nice appearance, and the feeling as a wood material will be impaired. The present invention has been made in view of the above points, WPC
It is an object of the present invention to provide a flooring material for a heating floor that can reduce the occurrence of cracks on the veneer plate without the need for treatment.

[Means for Solving the Problems]

According to the present invention, in a flooring material 2 for a heating floor provided with a heating element 1, a veneer 3 attached to the surface of the flooring material 2, a number of thin wood pieces 4 are randomly oriented with an adhesive. It is characterized by being formed by slicing the flitch 9 obtained by pressure molding.

[Operation]

In the present invention, the veneer 3 is formed by pressing a large number of thin wood pieces 4 together with an adhesive to form the veneer 3 so that the direction of the grain (tissue) of the veneer 3 is a large number of the thin wood pieces. It becomes random according to the direction of 4, and the directionality of strength is lost in the veneer plate 3, and cracks are less likely to occur.

【Example】

Hereinafter, the present invention will be described in detail with reference to examples. In the present invention, as the veneer plate 3, for example, one disclosed in Japanese Patent Application No. 62-271076 provided by the present applicant can be used. That is, as shown in FIG. 4, a wood thin piece 4 obtained by slicing wood 6 (for example, a planer shaver product)
First, apply the adhesive. The wood slice 4 has a thickness of 0.05-0.
80 mm (preferably 0.10 to 0.50 mm) with an area of 6 to 400 mm ²
(Preferably 25 to 250 mm ² ) and aspect ratio (width / width)
It is formed so as to have a thickness of 0.4 to 7.0 (preferably 0.8 to 3.0), and these wood thin pieces 4 may be rounded. If the shape is 60% or more, dimensions other than the above may be mixed. As the adhesive, a flexible material having a large elongation rate, such as a urethane adhesive, a urethane emulsion adhesive, a soft polyester resin, or a vinyl acetate adhesive, can be used, and the elongation rate is 30%.
It is preferably about 500%. The application of the adhesive to the thin wood pieces 4 can be performed by spraying or kneading. Next, the wood thin pieces 4, 4 ... Are pressed to form a flitch 9. The press-molding can be performed by, for example, a press device 10. As shown in FIG.
Molding can be performed by inserting 4, 4, ... And pressing them with the press board 8. Pressure pressing in the pressing device 10 may be any pressure sufficient to collapse wooden strands 4 along the pressing ^{surface, 2Kg / cm 2 ~50Kg / cm} 2 ( preferably 7 Kg / cm ² ~
14 Kg / cm ² ) is common. The veneer 3 can be obtained by slicing the flitch 9 with the slicing blade 11. Here, when the veneer plate 3 is created by assembling the wood thin pieces 4, the wood thin pieces 4 are stacked in parallel along the pressing surface during press forming.
... The grain directions (textures) are randomly oriented in all directions, and even in the veneer 3, the grain directions are also random. Therefore, since the veneer 3 thus created has no grain (tissue) directionality, the strength directionality also disappears. Further, when the wood thin piece 4 is used as described above, the wood thin piece 4 is easily deformed during the press-molding, and the adhesion failure due to the void or the foaming of the adhesive due to the insufficient pressure does not occur.
In other words, a wood piece obtained by crushing wood such as a particle board may cause voids during pressure-molding and insufficient adhesion or foaming due to insufficient pressure. Are arranged in parallel and voids are less likely to occur. Furthermore, the thin wood piece 4 is approximately the entire surface, and the amount of adhesive applied is increased to increase the amount of the veneer 3
It is possible to increase the amount of resin contained in the veneer plate 3, facilitate bending of the veneer plate 3, and reduce the occurrence of warpage. Next, a specific example of manufacturing the veneer 3 will be described. (Specific example) The main component (80% or more) is obtained by finely slicing a piece of pine pine as a wood thin piece 4 and having a thickness of 0.10 to 0.40 mm, an area of 12 to ²⁰⁰ mm ² , and an aspect ratio of 1.0 to 3.0. Then, 70 g of a urethane adhesive (GA601-01 manufactured by Sumitomo Bakelite Co., Ltd.) was added to 100 g of the wood thin piece 4 and kneaded to apply the adhesive to the wood thin piece 4. Next, this wood thin piece 4 was pressed at a pressure of 10 kg / cm ² for 1 hour to form a flitch 9, and the flitch 9 was sliced to a thickness of about 0.50 to 0.60 mm to obtain a veneer 3. . FIG. 1 shows the veneer 3 obtained as described above as a substrate 14
Is a floor material 2 formed by being attached to the surface of
As the substrate 14, it is preferable to use a water-resistant plywood, for example, a WPC-treated plywood. When the overall thickness is 15 mm, the veneer 3 is preferably formed to have a thickness of about 0.5 mm. The flooring material 2 thus formed can be used, for example, in the heating floor shown in FIG. In the heating floor of FIG. 2, a hot water pipe 11 for circulating hot water is used as the heating element 1, and a soaking plate 19 is hung between the joists 13 mounted on the Daihiki 12 to make the soaking plate 19 In, the hot water pipe 11 is laid, and the floor material 2 is stretched between the joists 13 so as to cover the hot water pipe 11. FIG. 3 shows another embodiment of the present invention, in which an electric heater 15 as a heating element 1 is built in a floor material 2, and the floor material 2 is attached to a floor base to provide a heating floor. It can be configured. That is, a surface material such as a WPC plywood on which the electric heater 15 and the heat equalizing plate 19 attached to the protective sheet 18 are attached to the recess 17 on the upper surface of the base material 16 formed of plywood, and the veneer 3 is attached from above. 20
The flooring 2 can be formed by attaching the to the upper surface of the substrate 16. In the heating floor formed as described above, hot water pipe
The veneer 3 of the floor material 2 is repeatedly subjected to the action of cold by the heating element 1 such as 11 or the electric heater 15, but the veneer 3 has no grain (tissue) orientation and no strength orientation. Moreover, since it is reinforced with the adhesive resin contained therein, it is possible to reduce the occurrence of cracks in the veneer plate 3. By the way, if you repeatedly test with cold heat on a sliced veneer of natural wood, 100 mm × 150 mm
1mm or more cracks occur in the test size of, but with the veneer made as above (specific example), 100 ℃
It is heated for 2 hours at -20 ℃ and cooled for 2 hours at -20 ℃ for 20 cycles. No cracks occur in the repeated heat test. Also, soak in hot water at 80 ℃ for 3 hours, remove and leave for 1 hour.
No cracks occurred in a water resistance test in which drying was repeated at 10 ° C for 2 hours for 10 cycles, and cracks did not occur in a heat resistance test in which drying was performed at 80 ° C for 8 hours and leaving at room temperature for 16 hours was repeated 10 times.

【The invention's effect】

As described above, in the present invention, the veneer to be attached to the surface of the flooring material, a flitch obtained by pressure-molding a large number of thin wood slices with an adhesive in which the grain directions are randomized. Since it was formed by slicing, the direction of the wood grain (tissue) of the veneer becomes random according to the direction of many wood flakes, and the veneer loses the directionality of strength, Moreover, the veneer plate will be reinforced with the adhesive resin contained, and even if the action of cold heat repeatedly acts on the veneer plate by the heating element, it is possible to reduce the occurrence of cracks in the veneer plate, Since there is no directionality of expansion and contraction of the veneer and the occurrence of warpage can be reduced, it is not necessary to subject the veneer to WPC treatment. And since the veneer is made by slicing the flitch obtained by press-molding a large number of pieces of wood with an adhesive, the surface of the veneer is formed as a sliced surface of the flitch, and the surface of the veneer is It can be formed on a smooth surface.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a partially cutaway perspective view of a heating floor using the same floor material, and FIG. 3 is an exploded sectional view of another embodiment of the present invention. FIG. 4 is a diagram showing each step of manufacturing the veneer used in the present invention. 1 is a heating element, 2 is a floor material, 3 is a veneer, 4 is a thin piece of wood, 9
Is a flitch.

Claims (1)

(57) [Claims] 1. In a flooring material for a heating floor provided with a heating element, a veneer attached to the surface of the flooring material is pressure-molded together with an adhesive by laminating a large number of thin wood pieces in random grain directions. A flooring material for a heating floor, which is formed by slicing the flitch obtained as described above.