JPH02197661A - Non-charged floor panel - Google Patents

Abstract

PURPOSE:To promote sound proof efficiency by providing leg bodies to four corners underneath a base material having non-charged layers constituted mainly of carbon powder and thermosetting resin on the surface thereof. CONSTITUTION:Non-charged layers 3 constituted mainly of carbon powder and thermowetting resin having a thickness about 0.4-5mm are provided to at least the upper surface of a base material 2 of a woody material and the like to form a floor panel 1. Four metallic leg bodies 5 are respectively mounted to corners underneath the floor panel 1 to form together with the floor panel as a unit. In addition, the side ends of the floor panel 1 are confronted with each other to form a floor, A conductive tape 6 is stuck between adjacent non-charged layers 3 of the floor panel 1 to connect electrically and, at the same time, the edge of the non-charged layer 3 located at the fasthest outside is earthed. According to the constitution, execution can be easily carried out.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a non-static panel, specifically, a non-static panel that does not itself become charged and is capable of removing static electricity generated and charged in the human body, etc. Regarding sexual floor panels.

(Prior Art and Problems to be Solved by the Invention) In general, the human body is electrically charged due to friction between clothes or friction between shoes and a carpet. If you touch a doorknob or OA equipment in such a state, the static electricity charged in your body will be discharged, and your body will receive an electric shock and the OA equipment will also discharge.
It is widely known that equipment can be damaged by electrostatic discharge. For this reason, conventionally, an uncharged layer made of aluminum sheet or stainless steel sheet is provided on the surface layer or middle layer of the base material that makes up the floor panel, and the static electricity generated and charged on the human body is removed through this uncharged layer. As a result, a non-static floor panel has been developed that can eliminate the above-mentioned problems.

However, since the non-electrostatic floor panel uses an aluminum sheet or a stainless steel sheet, it has poor shock absorption properties, easily transmits pedestrian and vibration sounds, and has a poor walking feel.

Moreover, the above-mentioned metal sheet not only increases the weight per unit area, but also has the problem of deteriorating the workability of the floor panel, such as requiring time and effort to drill and cut.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a non-static floor panel that has excellent soundproofing properties, improves the feeling of walking, and is lightweight and easy to process.

(Means for Solving the Problems) In order to achieve the above object, the non-static floor panel according to the present invention has an anti-static layer mainly composed of carbon powder and a thermosetting resin on at least the upper surface of the base material. This is the configuration provided.

Examples of the carbon powder include graphite and charcoal, and Mengki charcoal includes seeds, husks, trunks, branches, leaves, etc. of plants in the family family, such as wood, kolyang, wheat, sugar cane, rice, and millet, as well as burned rice husks. This includes those obtained by

When burning the plants, etc., the higher the baking temperature is, the more suitable it is. This is because carbonization is generally performed at a firing temperature of 300 to 50
It progresses at about 0℃, but when fired at a temperature of 1000℃ or higher, the charcoal shrinks and its specific surface area becomes smaller.
Moreover, it becomes carbon rich.

Note that the carbon powder does not necessarily have to be used alone, and may be used in combination with powders such as silica, alumina, magnesia, etc. Furthermore, if necessary, fibrous reinforcing materials and fillers may be used. Also, lightweight aggregates and the like may be added.

Further, the particle size of the granular material containing carbon powder as a main component (hereinafter referred to as "carbon granular material") is not particularly limited, but is preferably about 0.2 to 200 μm.

As the thermosetting resin, any one such as a novolac type phenol resin, a resol type phenol resin, a furan resin, a melamine resin, etc. can be used.

The base material is plywood or particle board.

In addition to wood materials such as LVL and wood boards, examples include single or composite hydraulic inorganic materials such as gypsum boards, calcium silicate boards, wood chip cement boards, and slag plaster boards, which are lightweight and easy to process. In order to achieve this, wood-based materials are preferred. The size of the base material is 300 to 600 mm on one side.
It is generally square or rectangular, with a thickness of 20 to 60 mm.
selected within the range.

Legs (described in detail in Examples) are attached to the four corners of the lower surface of the non-static floor panel formed to the above size, and used by laying it on a floor slab.

The legs provide a space layer between the floor slab and the floor panel for arranging cables.

It is preferable that the legs be made of metal and electrically connected via an uncharged layer and a conductive material, and grounded to a wall surface or a floor slab via the legs. In addition, when considering soundproofing properties, it is preferable to use rubber legs at the lower ends of the legs, but if metal legs are used, they can be grounded to the floor slab, further improving the antistatic effect. do.

In addition, if the frequency of attachment and detachment is low, the length of one side should be 900~
It may be a large size of 1800 mm.

In that case, it is preferable to provide legs at predetermined intervals on the sides of the lower surface or in the center of the lower surface.

As a method for forming an uncharged layer on the base material, for example,
A method of directly kneading carbon powder and a thermosetting resin and using the same to form an uncharged layer, and a self-curing powder obtained by attaching a thermosetting resin to the surface of the carbon powder. There are two methods of forming an uncharged layer using the granules after they have been created, but carbon powder has poor wettability with resin.
Even when carbon powder and thermosetting resin are kneaded like in the former case, the carbon powder is uniformly dispersed within the thermosetting resin.

It is difficult to make it stick. This problem can be solved by adopting the latter method. That is, according to the latter method, a thermosetting resin is attached to the surface of carbon powder in advance to create a self-curing powder, and then this is layered on the surface of the base material to form an uncharged layer. As a result, the carbon powder is evenly dispersed within the uncharged layer. Therefore, the latter method has the advantage that it is possible to form an uncharged layer with less variation in density, and to obtain an uncharged floor panel that has sufficient adhesion to the base material and conductive performance with less variation. be.

The self-curing powder used in the latter method is, for example,
It can be manufactured by the following method.

First, carbon powder and a low-molecular material such as a solid thermosetting resin, such as an initial condensate of a resol type phenolic resin, are put into a Nigu, and after kneading these with a solvent such as alcohol, the kneaded product is In this method, a self-hardening powder is obtained by taking out the product from Nigu, putting it into an extrusion molding machine, extruding it while kneading it, drying the resulting molded product, and pulverizing it.

The second is a method in which an initial condensate of a thermosetting resin is synthesized and, at the same time, this thermosetting resin is attached to the surface of carbon powder. That is, when reacting the initial condensate of phenolic resin, carbon powder is introduced into the reaction vessel along with phenols and aldehydes, and the phenol resin synthesis reaction is carried out in this state. Apply the initial condensate of phenolic resin evenly to the surface,
This is a method of obtaining self-hardening powder by filtering and drying the powder.

In addition, if carbon powder is added and kneaded when synthesizing the initial condensate of a thermosetting resin, the carbon powder will be more concentrated than when the carbon powder is added to the synthesized initial condensate and kneaded. Since the thermosetting resin evenly adheres to the surface of the thermosetting resin, it is preferable to use the self-curing powder obtained by the second method in order to form a uniform uncharged layer.

In addition, the content ratio of the carbon powder and thermosetting resin when creating the self-curing powder is in the range of 10 to 80 parts by weight of the thermosetting resin to 100 parts by weight of the carbon powder. It is preferable to set it to . If the thermosetting resin is 10 parts by weight or less, the mechanical strength such as adhesion with the base material will be lowered during use, which is undesirable. If it is 80 parts by weight or more, it will become rich in phenolic resin. This is because the electrical resistance becomes high.

There are various methods described below as methods for forming an uncharged layer on the surface of a substrate using the self-hardening powder obtained as described above.

The first method is to integrally form an uncharged layer on the surface of the base material by dispersing self-curing powder to a uniform thickness on the surface of the base material and then performing heating and pressure molding.

The second method is to spread the self-hardening powder evenly onto a plate and press it with a roll or the like heated to about 50 to 100°C, thereby partially compressing the self-hardening powder. This is a method of forming a non-charged layer integrally on the surface of a base material by creating a sheet material in advance, overlapping the sheet material on the surface of the base material, and molding under heat and pressure.

The third method is to form the non-charged layer 3 at the same time as particle board, wood chip cement board, etc. are made. That is, the self-hardening powder is spread to a uniform thickness on the surface of a forming mat made by kneading wood chips and adhesive resin or cement, and then heated and pressure-molded to form a particle board or the like. This is a method in which an uncharged layer is integrally formed on the surface of the plate at the same time as the plate is made. According to this method, the base material and the uncharged layer are brought into close contact with each other, so it is the most suitable among the three methods described above.

In forming the above-mentioned uncharged layer, the thickness of the uncharged layer is preferably set to about 0.4 mm to 5 mi+. This is because if it is less than 0.4 mm, the uncharged layer may become non-uniform and may be missing.
This is because if it is more than In, the cost will be high.

Electrical resistance (volume resistivity) of the uncharged layer of the floor panel of the present invention
When measured, the resistivity was lO6~105Ωc1
It was within the range of 1. Compared to the resistivity of the wood material used as the base material, lO@~10''Ωcm, and the resistivity of the phenol resin used as the binder, 10''~10'', it is extremely small and has good conductivity, so it has an antistatic effect. is large.

In addition, after laying the floor panel of the present application to form a floor surface, it is common to lay a floor finishing material such as antistatic tile carpet or long foamed PVC sheet on the surface. A decorative material such as a PVC sheet or carpet that has been subjected to antistatic treatment may be attached and integrated in advance.

(Example) Next, an example in which a non-static floor panel obtained by the above-described method was constructed will be described.

In the first embodiment, as shown in FIGS. 1 and 2, a non-charging layer 3 is provided on the upper surface of a base material 2 to form a non-charging floor panel 1, and the bottom corner of this floor panel 1 is This is a case where four metal legs 5 are attached to each of the four metal legs 5. That is, the metal leg 5 has a rubber leg or a metal leg 5a at its lower end. Furthermore, the metal leg 5 is
A fixing pedestal part 5b is integrated into the upper end of the base material, and by screwing the fixing pedestal part 5b to the bottom corner of the base material 2, the floor panel can be created! is integrated into.

Then, the side end surfaces of the floor panels 1 are butted against each other to form a floor surface, and a conductive tape 6 is pasted between the adjacent non-charged layers 3 of the floor panel 1 for electrical connection. It has a floor structure in which the edge of the uncharged layer 3 is grounded.

In the second embodiment, as shown in FIGS. 3 and 4, uncharged layers 3.4 are formed on the front and back surfaces of the base material 2, and
．． This is a case where a non-static floor panel 1 is formed by screwing a conductive bottle 7 such as a tab pin screw between the 4 and 4 to make an electrical connection. Furthermore, by inserting the upper end of the bolt 8 into the recessed hole 8a provided in the lower corner of the floor panel l, the uncharged layer 4 and the bolt 8 are electrically connected, and the height of the floor panel 1 is reduced. It is adjustable.

Then, the side end surfaces of the floor panels 1 are butted against each other to form a floor surface, adjacent bolts 8 and 8 are connected with a conductive connecting material 9, and the outermost bolt 8 is grounded. It has become.

According to this embodiment, since the adjacent bolts 8.8 are connected by the connecting member 9, there is an advantage that sideways shaking during an earthquake can be prevented.

In the third embodiment, as shown in FIGS. 5 and 6, a non-charging layer 3 is provided on the upper surface of a base material 2 to form a non-charging floor panel 1. The female screw fitting 11 is attached to the through hole 11a and electrically connected to the non-charged layer 3,
Furthermore, by screwing the bolt 8 into the female threaded fitting 11, an electrical connection is established and the height can be adjusted.

Then, a floor surface is formed by butting the side end surfaces of the floor panels l, metal legs 5a are provided at the lower ends of adjacent bolts 8.8, and the floor structure is electrically connected to the floor slab and grounded. .

In the fourth embodiment, as shown in FIGS. 7 and 8, an uncharged layer 3 is formed on the upper surface of a base material 2, and mutually removable recessed portions 13 are formed on opposing side end surfaces. 14, and a conductive material 13a, 1 such as a metal plate is provided in this phase notch 13.14.
4a and extend the non-charging layer 3 to form a non-charging floor panel l.
If formed, the floor panel! Legs 5 are provided at the corners of the lower surface.

A floor surface is formed by fitting the recessed portions 13 and 14 of the floor panel 1 to form an electrical connection, and the uncharged layer 3 located at the outermost side is grounded.

In the above-mentioned embodiment, a carpet or resin sheet treated with antistatic treatment may be integrally attached to the upper surface of the floor panel 1 as a decorative material.

Next, an experimental example regarding the conductivity of the uncharged layer according to the present application will be described.

Experimental Example 1 A reaction vessel was charged with 770 parts by weight of phenol, 1328 parts by weight of 37% formalin, and 80 parts by weight of hexamethylenetetramine, and further added with an average particle size of 5 μm and a solid carbon content of 87
．． 1100 parts by weight of 5% scale graphite was charged. This was heated to 90°C over about 60 minutes, reacted for 3 hours, cooled, filtered, and air-dried to obtain 1830 parts by weight of self-hardening powder with an average particle size of 50μ. Obtained. The content of phenolic resin in this self-curing powder was 40% by weight. Then, this self-hardening powder was heated at a temperature of 160°C and a pressure of 25 kgf/cra'.
Heat and press for 0 minutes to a thickness of 5 mm.

A plate-shaped sample with a specific gravity of 0.8 was obtained, and samples with different specific gravity were obtained by the same operation as described above, and the surface resistivity 1 volume resistivity of these samples was measured (JISK6911
Measuring machine; Takeda Riken TR6843).

Experimental example 2 Average particle size of carbon powder: lOμl, amount of fixed carbon: 77.5
The surface resistance 9 volume resistivity of a sample obtained in the same manner as in Experimental Example 1 described above except for using % bead-shaped graphite was measured.

Comparative Example The surface resistance 1 volume resistance of a sample obtained in the same manner as in Example 1 above was measured except that commercially available sawdust that had passed through 28 meshes was used in place of the carbon powder.

The measurement results are shown in Tables 1 and 2.

Table 1: Surface resistivity (Ω) Table 2: Volume resistivity (0 cm) As is clear from the above measurement results, the surface resistance 9 volume resistivity of Experimental Examples 1 and 2 is extremely small compared to the comparative example. It was found that it is difficult to charge static electricity. Therefore, if the samples according to Experimental Examples 1 and 2 are integrally provided on the surface of the base material to form an uncharged layer,
Since the static electricity generated and charged in the human body is removed through this uncharged layer, it is thought that electric shock and electrostatic damage to OA equipment can be prevented.

Experimental example 3 Experimental example on the surface of a particle board with a thickness of 30 mm! Sprinkle the self-hardening powder used in
A non-static floor panel having a non-static layer having a thickness of 1a+e to 2IIIl was produced by heating and pressing at 5 kgf/am'' for 3 minutes.

The resulting floor panel can be cut and drilled with woodworking tools, and feels the same as a wood panel when walking on it.

It was the generation of sound.

(Effects of the Invention) As is clear from the above explanation, the present invention does not provide an uncharged layer made of an aluminum sheet or a stainless steel sheet on the surface of a base material, but rather an uncharged layer made of at least carbon powder and a thermosetting resin. Because it has a charged layer, it has a high shock absorption capacity, reduces the propagation of vibration noise, etc., and has a good walking feel.
A non-static floor panel with less fatigue feeling can be obtained.

Furthermore, since the non-electrostatic layer made of at least carbon powder and thermosetting resin has excellent machinability, it is easy to drill and cut holes during construction, making it possible to remove the conventional electrostatic charge without using special techniques or tools. This has the effect that it can be constructed in the same way as floor panels without prevention treatment.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views showing a first embodiment of a non-static floor panel according to the present invention and a cross-sectional view of the construction state, and FIGS. 3 and 4 are a cross-sectional view showing a second embodiment of a non-static floor panel according to the present invention. 5 and 6 are sectional views showing the third embodiment of the present invention and sectional views in the constructed state, and FIGS. 7 and 8 are sectional views showing the third embodiment of the present invention. FIG. 4 is a cross-sectional view showing a fourth embodiment and a cross-sectional view in a construction state. 1... Non-static floor panel, 2... Base material, 3, 4...
・Uncharged layer. 2nd prisoner 1: How to stop charging.

Claims (2)

[Claims] (1) A non-static floor panel characterized in that an anti-static layer consisting mainly of carbon powder and a thermosetting resin is provided on at least the upper surface of a base material. (2) The non-electrostatic floor panel according to claim 1, characterized in that legs are provided at at least four corners of the lower surface of the base material.