JPH0710206U - Conductive floor tiles - Google Patents

Abstract

(57) [Summary] [Purpose] A conductive floor tile that can be manufactured by a simple manufacturing process and has excellent conductivity without impairing the design. [Structure] A tiled floor material has a conductive coating that extends from the front edge to the side surface to the back edge, and if necessary, the back edge of the tiled floor is knurled. Floor tiles.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a conductive floor tile used for floors in computer rooms, IC assembly plants, clean rooms, etc.

[0002]

[Prior art]

 Conventionally, conductive floor tiles used for floors in computer rooms, IC assembly plants, clean rooms, etc. include metal fibers, metal powders, metal oxides, carbon black, and carbon fibers that have conductivity in the floor tile composition. There are those in which a conductive material such as is added, or those in which existing floor tiles having no conductivity and conductive tiles, conductive sheets, or conductive resin blocks are combined and integrated.

[0003]

[Problems to be solved by the device]

 In the conventional floor tile composition in which a conductive material is added, the conductive material is expensive, and the conductive effect cannot be obtained unless it is used in a large amount, and the color of the material itself is black. Alternatively, since it is a dark color system, there is a problem that the designability is impaired due to the limitation of coloring. In addition, existing floor tiles and conductive tiles, conductive sheets, or composites of conductive resin lumps have a problem in that the manufacturing process is complicated and the productivity is low.

[0004]

[Means for Solving the Problems]

 The problems are the invention of claim 1 of the present application, "a conductive floor tile having a conductive coating film which is continuous from the front edge to the side surface of the tile floor material to the rear edge", and the invention of claim 2 "tile shape This is solved by the conductive floor tile according to claim 1, wherein the back surface end portion of the floor material is knurled. The present invention will be described below with reference to the drawings. As schematically shown in FIGS. 1 and 2, the tile-like flooring material 1 used in the present invention may be any known vinyl-based, ceramic-based or rubber-based flooring material. The size of the floor material is preferably 600 mm × 600 mm or less, and more preferably 450 mm × 450 mm or less in view of the human walking length of the natural walk, because the more the human beings come into contact with the conductive coating film, the more static electricity is removed. There is no particular limitation on the thickness of the floor material.

The conductive coating film 2 of the present invention is obtained by continuously applying a conductive coating material from the surface edge 6 of the tiled flooring material 1 to the side surface portion 7 to the back surface end portion 8. The conductive paint used in the present invention is a metal oxide such as tin oxide, zinc oxide or titanium oxide, carbon black such as graphite or acetylene black, aluminum, nickel, copper, iron or the like in powder or flake form. Conductive filler such as copper and nickel coated on the surface, olefin resin such as polyethylene and polypropylene, vinyl resin such as polyvinyl acetate and polyvinyl chloride, acrylic resin such as acrylonitrile and methyl polyacrylate Conductive paints containing thermoplastic resins such as, are preferred, but paints containing thermosetting resins such as acrylic resins, epoxy resins, phenolic resins, and melamine resins that are low temperature curing types instead of thermoplastic resins. Can also be used. The thickness of the conductive coating film 2 is preferably 0.05 mm to 0.5 mm. If it is thinner than 0.05 mm, the coating film may be easily damaged and stable conductivity may not be obtained. In addition, 0. If it is thicker than 5 mm, the paint cost is high and it is not economical. The position of the conductive coating film 2 is only an edge on the surface. The width of the conductive coating film 2 applied to the surface edge 6 of the present invention is preferably 0.1 to 0.5 mm because it does not impair the design of the tile surface and has stable conductivity. If it is narrower than 0.1 mm, stable conductivity may not be obtained, and if it is wider than 0.5 mm, the design of the tile surface may be impaired. The width of the conductive coating film 2 on the back end 8 is preferably 1 to 10 mm from the edge. If it is narrower than 1 mm, contact with the underlayer 3 may be insufficient, and stable conductivity may not be obtained. If it is wider than 10 mm, the cost becomes high and it takes time to apply. The application of the conductive paint is preferably a spray method because it does not take much effort. In particular, the conductive floor tile according to claim 2 in which the back surface is knurled is stacked by stacking the back surface, the back surface, and the front surface together as shown in FIG. By setting the thickness to 0.1 to 0.5 mm, the width of the conductive coating film 2 on the tile surface edge 6 becomes 0.1 to 0 as shown in the partial sectional view of the conductive floor tile 5 in FIG. Since the back end 8 is knurled, the conductive paint is applied through the groove of the knurl so that the width of the conductive coating film 2 is 1 to 10 mm, which is troublesome. It is possible to obtain the conductive floor tile 5 of the present invention without the need.

By knurling 1 mm or more from the backside of the tile, stacking the backside and backside together as described above, and spraying conductive paint, the width of the backside of the tile is 1 mm or more. To obtain a conductive coating film 2. For this purpose, the knurling pattern is not particularly limited, but at least one pattern can be accommodated within 1 to 10 mm, the groove depth is 0.1 to 1.0 mm, and the groove width is 1 to 10 mm. . As an example of the pattern, besides the honeycomb pattern 9 shown in FIG. 4, a flat pattern, a twill pattern, etc. can be exemplified.

[0007]

[Action]

 The operation of the present invention will be described with reference to the drawings. The conductive floor tile 5 of the present invention continues from the front edge 6 through the side surface portion 7 to the back surface end portion 8 as illustrated in the schematic view of FIG. 1 and the partial sectional view of the conductive floor tile 5 of FIG. Since the conductive coating film 2 is provided, static electricity charged on a person or an object on the conductive floor tile 5 can be applied from the conductive coating film 2 on the front end portion 6 to the side surface portion 7 to the rear surface end portion 8 to the construction shown in FIG. Escape to the floor base layer as shown in the example. When the grounding of the floor base layer is insufficient, the grounding 4 may be provided directly from the conductive coating film 2 at the back end.

[0008]

【Example】

 [Example 1] Composition tiles of non-asbestos vinyl flooring (length 304.8 mm x width 304.8 mm, thickness 2.0 mm, Nitto Boseki Co., Ltd., product name Nitto Tiles NS) have a width on the surface edge. Spray conductive paint (filler: conductive carbon, resin: acrylic polyol resin, manufactured by Nippon Bee Chemical Co., Ltd., trade name R-240C / D) to a width of 0.1 mm and width of 5 mm on all side surfaces and back end. Then, a conductive coating film having a thickness of 0.1 to 0.2 mm was provided to obtain a conductive floor tile according to claim 1 of the present invention.

Example 2 A composite tile of non-asbestos vinyl flooring provided with a honeycomb pattern having a depth of 0.15 mm, a groove width of 1 mm, and a spacing of 1.8 mm by knurling the entire back surface of the composition tile ( Vertical 304.8 mm x horizontal 304.8 mm, thickness 2.0 mm, made by Nitto Boseki Co., Ltd. is stacked with the front surface and the front surface, the back surface and the back surface combined. Conductive paint (filler: conductive carbon, resin: acrylic polyol) Resin, Nippon Bee Chemical Co., Ltd., trade name R-240C / D) is sprayed, the thickness of the conductive coating is 0.1 to 0.2 mm, the width of the conductive coating, and the surface edge is 0.1 to 0. A conductive floor tile according to claim 2 of the present invention having a surface area of 0.2 mm, an entire side surface, and a back surface edge portion of 4 to 7 mm was obtained.

[Comparative Example 1] Commercial non-asbestos vinyl-based flooring material Flooring material composition tile (length 304.8 mm x width 304.8 mm, thickness 2.0 mm, manufactured by Nitto Boseki Co., Ltd., product name Nitto tile) NS) was used as a comparative example.

[Tests and Results] Examples based on the Ministry of International Trade and Industry Machine Information Industry Bureau “Electronic Computer System Safety Measures Standard: Volume Resistance Measurement Method” and JIS L-1021 (Rug Test Method) Human Body Charge Level (Stroll Method) The volume resistance values (Ω) of the conductive floor tiles (hereinafter referred to as samples) obtained in Example 1 and Example 2 were measured and shown in Table 1. In addition, the conductive floor tile obtained in Example 2 is knurled on the back surface and has a conductive coating film on it, so that it is in good contact with the underlying layer and the conductive effect is improved. .

[0012]

[Table 1] * 1 Do not touch the conductive coating * 2 Contact the conductive coating

[0013]

[Effect of device]

The conductive floor tile of the present invention has a conductive coating film that is continuous from the front end to the side surface to the back end, and has a small volume resistance value of 5.0 × 10 ⁶ (Ω) or less, which is suitable for the human body. The charged voltage is also 75V (Example 1) and 25V (Example 2), which is smaller than 400V or more of a normal floor tile, and has an effect of immediately discharging static electricity charged on a person or an object. When the back surface is knurled, the state of contact with the underlying layer is good and the conductivity effect is improved.

[Brief description of drawings]

1 is a schematic view of a conductive floor tile of the present invention.

FIG. 2 is a partial schematic cross-sectional view of the conductive floor tile of the present invention.

FIG. 3 is a schematic view of the construction of the conductive floor tile of the present invention.

FIG. 4 is an example of a knurled pattern provided on the back surface of the conductive floor tile of the present invention.

FIG. 5 is an explanatory schematic diagram when stacking and spraying floor tiles having knurled back surfaces on the back and back surfaces, and front and back surfaces together.

[Explanation of symbols]

 1: Tile floor material 2: Conductive coating film 3: Underlayer 4: Earth 5: Conductive floor tile 6: Surface edge 7: Side surface part 8: Back surface end part 9: 1 pattern of knurling 10: knurling Groove

Claims (2)

[Scope of utility model registration request] 1. A conductive floor tile comprising a tiled floor material having a conductive coating film which is continuous from a front edge to a side surface portion to a rear surface end portion. 2. The conductive floor tile according to claim 1, wherein the back end portion of the tiled floor material is knurled.