JP2015074927A - Construction method of floor coating material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of applying a floor coating material capable of obtaining satisfactory antistatic performance at low costs.SOLUTION: In the method of applying a floor coating material, after forming a coated floor 12 by applying a floor coating material over a subfloor 10, the surface of the floor coating material is engraved to form grid-like grooves 13. After disposing the ground wires 14 in the grooves 13 formed in grid-like patterns, a conductive floor coating material is applied over the coated floor 12 to form a new coated floor 20. The ground wire 14 may be formed of, for example, a conductive tape material or conductive coating material.

Description

  The present invention relates to a method for constructing a coating material for imparting conductivity to a coating material applied to a floor of a building.

  Since coating materials such as epoxy resins and urethane resins have high electrical resistance, static electricity tends to accumulate on the human body when a person walks on the coated floor after construction. Therefore, in order to secure the conductivity on the floor surface where the flooring material was applied and to suppress the electrostatic charge to the human body, a method of applying a conductive flooring material mixed with conductive filler on the floor base Alternatively, a method has been proposed in which a carbon fiber mixed paper is stuck on a floor base and a conductive flooring material is applied thereon (see Patent Document 1).

  By the way, if the existing flooring material remains in the renovation work of the building, the existing flooring material is not removed in consideration of the construction period and construction cost, and a new flooring material is applied on top of it. The method is often adopted. In that case, since the coating material becomes thicker, the electrical resistance value becomes higher, and the static electricity charged on the human body becomes more intense, and therefore countermeasures are required.

JP-A-6-2417

  Therefore, the following method is considered to suppress the generation of static electricity that causes severe discharge when a new thick coating is applied from above while leaving the existing coating as described above. It is done.

  For example, there is a method in which a conductive primer mixed with carbon or the like is applied to the entire surface of an existing coating floor, and a conductive coating material is applied thereon. This method is the same as the case of constructing a normal conductive coating material as in the above-mentioned prior art, and although a sufficient antistatic effect can be obtained, the construction cost is high.

  Further, for example, there is a method in which an ordinary coating material is applied on an existing coating floor and an antistatic wax is applied to the surface. In this method, the antistatic wax has an advantage that an antistatic effect can be obtained at a relatively low cost, but it is necessary to perform repainting maintenance every several months, resulting in an increase in cost and labor. End up. In addition, it is difficult to secure a maintenance schedule in facilities such as factories that are always in operation.

  The present invention has been made in consideration of the above-described conventional problems, and an object of the present invention is to provide a method for applying a coating material that can obtain sufficient antistatic performance at low cost.

  The method for applying a coating material according to the present invention comprises forming a grid-like groove by rolling the surface of a coating floor formed by applying a coating material on a base, and then applying the coating from above the groove. A new coating floor is constructed by applying a conductive coating floor material having conductivity to the floor.

  According to such a method, even in the case of constructing a new painted floor from above without removing the existing painted floor formed of the coated floor material in the renovation work of the building, etc. Since a grid-like groove is provided under the new coating floor formed of the coating material, for example, a new coating is applied to the conductive coating material that has flowed into the groove or to a ground wire separately disposed in the groove. Conductivity from the floor is ensured, and an antistatic floor having sufficient antistatic performance can be constructed. As a result, it is possible to construct a new paint floor while leaving the existing paint floor, and there is no need to embed a conductive member for grounding on the entire surface between the existing paint floor and the new paint floor. Construction at low cost is possible.

  After the ground wire is disposed in the groove, the conductive coating material may be applied from above the ground wire to the coating floor. By arranging the ground wire in the groove, the antistatic performance in a new coating floor can be further enhanced.

  The ground wire is formed of a tape-like member having conductivity on at least the surface and having an adhesive surface on the back surface, and the tape-like member is bonded to the bottom surface of the groove portion, and the surface is It is good to be placed in contact with the conductive coating floor material. If it does so, the installation operation | work to the groove part of an earth wire can be performed easily, and also the conduction | electrical_connection between the new coating floor formed with the electroconductive coating material and an earth wire can be ensured.

  The ground wire may be formed of a conductive coating material. Also in this case, the installation work to the groove part of an earth wire can be performed easily, and also the conduction between the new coating floor formed with the conductive flooring material and the earth wire can be secured.

  According to the present invention, since the grid-like groove is provided under the new coating floor formed of the conductive coating material, for example, the conductive coating material that has flowed into the groove or a separate groove is disposed. Therefore, it is possible to construct an antistatic floor having sufficient antistatic performance by ensuring conduction from the new coating floor to the ground wire. Thereby, a new coating floor can be constructed while leaving the existing coating floor, and an antistatic floor can be constructed at a low cost.

FIG. 1 is a perspective sectional view schematically showing a state in which ground wires are arranged in a grid pattern on an existing coating floor. FIG. 2 is a perspective cross-sectional view schematically showing a state in which an antistatic floor is constructed by constructing a new coating floor with a conductive coating material on the coating floor and the ground wire shown in FIG. FIG. 3 is a cross-sectional view schematically showing a structural example in the case where the ground terminal of the antistatic floor shown in FIG.

  Hereinafter, the construction method of the flooring material according to the present invention will be described in detail with reference to preferred embodiments.

  According to an embodiment of the present invention, there is provided a method for constructing a flooring material by removing an existing flooring formed by applying a coating material on a foundation (floor base) such as concrete in a renovation work of a building or the like. First, it is a method for constructing an antistatic floor having sufficient antistatic performance at low cost by forming a new coating floor thereon.

  First, in the construction method of the coating material according to the present embodiment, as shown in FIG. 1, the groove portion 13 is formed by rolling the surface of the coating floor 12 applied on the base 10 in a lattice shape (a grid pattern). Is formed in a lattice shape, and the ground wire 14 is disposed in the groove portion 13 so that the ground wire 14 is disposed in a lattice shape.

  The base 10 is a floor base formed of a general floor material such as concrete or mortar constituting a floor of a building. In the present embodiment, a case where a concrete base 10 is used is illustrated.

  The coating floor (first coating floor) 12 is, for example, applied by pouring and spreading an epoxy resin-based or urethane resin-based coating material, which has been conventionally used and has no antistatic performance, onto the surface of the base 10. -It was formed by drying.

  The groove 13 is formed by covering the surface of the coating floor 12 in a lattice shape (see also FIG. 3). As shown in FIG. 3, the depth of the groove portion 13 is preferably formed to be approximately the same as the thickness of the coating floor 12 or slightly larger or smaller. In the example shown in FIG. 1, the groove portions 13 are formed on the surface of the coating floor 12 so as to have a lattice shape in which the vertical and horizontal directions are orthogonal to each other with a predetermined interval. The groove portion 13 may be formed in an oblique lattice shape or the like in which the longitudinal and lateral directions intersect obliquely. The cross-sectional shape of the groove 13 may be other than the rectangular shape as shown in FIG. The arrangement interval of the groove portions 13 may be constant in one antistatic floor 22 or may be changed. The grooves 13 may be arranged in parallel with each other in a parallel direction instead of a lattice shape. The width of the groove 13 is, for example, about 1 to 5 cm, and the arrangement interval of the groove 13 is, for example, about 10 to 150 cm. The resistance value of the antistatic floor 22 to be constructed can be adjusted by appropriately changing the arrangement interval of the grooves 13, that is, the arrangement interval of the ground wire 14. Also, the resistance value of the antistatic floor 22 to be constructed can be adjusted by changing the width of the groove 13.

  The ground wire 14 is a conductive member formed in a linear shape. The ground wire 14 is a tape system in which a tape-like member (conductive tape) having conductivity is attached to the bottom surface of the groove portion 13 or a coating material such as paint or resin having conductivity in the groove portion 13 ( It may be formed by a coating method in which a conductive coating material is coated. The ground wire 14 may have any shape as long as it can be embedded in the groove portion 13, and may be not only a shape that can be completely embedded in the groove portion 13 but also a portion that protrudes slightly upward from its upper opening. The ground wire 14 may be preliminarily formed at a factory or the like as a plurality of ground wires 14 as a lattice-like sheet (mesh sheet) with a predetermined interval, and this sheet is applied to the groove portion 13 on the site, and is applied by bonding or the like. .

As the tape-type ground wire 14, carbon or metal powder is attached to the surface of a conductive metal tape in which a metal material having conductivity such as copper or aluminum is formed in a tape shape, or a resin tape surface. A conductive resin tape can be exemplified. That is, the conductive tape should just be a tape-shaped member which has the electroconductive surface which has electroconductivity on the surface (upper surface) at least, and has an adhesive surface on the back surface. Here, the adhesive surface may have an adhesive attached to the back surface of the tape itself, or may be used by separately applying a predetermined adhesive. For example, the resistance value of a general commercially available conductive tape is about 0.01 to 0.2 (Ω / cm ² ).

  As the ground wire 14 of the coating method, a conductive resin material mixed with a conductive filler such as carbon or metal powder or a coating material such as a paint can be exemplified, and in particular, a quick-drying wire in consideration of the efficiency of construction work Is preferably used. In place of the ground wire 14 of this coating method, a conductive coating material for forming a coating floor 20 to be described later is poured into the groove portion 13, thereby omitting the installation of the ground wire 14 in the work process, and sufficient in the groove portion 13. The conductive coating material cured with a height dimension (cross-sectional area) can also function as a substantially ground wire.

  As shown in FIG. 1, one (or a plurality) of ground wires 14 out of the ground wires 14 arranged in a lattice shape via the groove 13 are connected to the ground terminal 16. The ground terminal 16 may be grounded to a reinforcing bar, a metal frame, or the like installed there in a place near the pillar or wall of the building. Further, as shown in FIG. 3, a metal anchor pile 18 may be driven from the existing coating floor 12 to the base 10 and a ground wire 14 may be connected to the anchor pile 18 to form the ground terminal 16.

  Next, as shown in FIG. 2, a conductive coating material is applied to the coating floor 12 from the ground wires 14 arranged in a lattice shape, and a new coating floor 20 is constructed, whereby sufficient charging is performed. An antistatic floor 22 having a prevention performance is constructed.

The coating floor (second coating floor) 20 is formed by applying and drying a conductive coating floor material (conductive coating floor material) on the surface of the coating floor 12 and the ground wire 14 by spreading and drying. is there. The coating floor 20 is constructed so as to be in contact with the surface (conductive surface) of the ground wire 14. In the case where the ground wire 14 is not installed as described above, it is necessary to construct the conductive coating material so as to surely flow into the groove portion 13. As the conductive coating material, a general epoxy resin-based or urethane resin-based coating material that forms the above-described coating floor 12 is used as a base material, and a conductive filler or ionic liquid is mixed into the base material. Therefore, it is preferable to use one having antistatic performance. For example, an antistatic coating material (conductive coating material) having an electric resistance of about 10 ⁶ Ω when mixed with a conductive filler and about 10 ⁹ Ω when mixed with an ionic liquid. The coating amount of the conductive coating material is not particularly limited. For example, the coating thickness after drying / curing (after completion of construction) is about 0.5 mm to 2 mm, preferably about 1 mm. As a coating method, for example, a construction method similar to a normal coating floor material such as a casting method using a gold trowel may be used, and a general usage amount is about 0.8 to 1.2 Kg / m ² .

  The conductive filler is not particularly limited, but may be conventionally used for antistatic purposes in coating materials and adhesives, and conductive metals such as silver, copper, nickel, aluminum, and zinc, and their oxidation. A powder of a product, a powder obtained by surface-treating titanium oxide or potassium titanate with tin oxide, antimony oxide, or the like, a conductive inorganic substance such as conductive carbon or graphite, or a mixture thereof may be used. The shape of the conductive filler is arbitrary, and may be, for example, flaky, spherical (granular), fibrous or the like.

  The ionic liquid refers to a salt composed of only ions, particularly a liquid compound, and can pass a current without adding a supporting electrolyte and exhibits a wide potential window. Among the ionic liquids, alicyclic ionic liquids and aliphatic ionic liquids are preferable. Ionic liquids include amine-based, pyridine-based, halogen-based, boron-based, phosphorus-based, etc., but especially amine-based liquids (alicyclic amine-based ionic liquids, aliphatic amine-based ionic liquids) Since it is difficult to reduce the physical properties (for example, product strength and durability) of the epoxy resin, it can be suitably used for the coating material of this embodiment.

  The alicyclic amine-based ionic liquid is not particularly limited. For example, N-methyl-N-propylpiperidinium bromide, N-methyl-N-propylpiperidinium chloride, N-methyl-N-propylpi Peridinium tetrafluoroborate, N-methyl-N-propylpiperidinium hexafluorophosphate, N-methyl-N-propylpiperidinium bis (trifluoromethanesulfonyl) imide, N-methyl-N-propylpyrrolidinium bromide, N-methyl-N-propylpyrrolidinium chloride, N-methyl-N-propylpyrrolidinium tetrafluoroborate, N-methyl-N-propylpyrrolidinium hexafluorophosphate, N-methyl-N-propylpyrrolidinium bis (Trifluoromethanes Phonyl) imide, N-methyl-N-butylpyrrolidinium bromide, N-methyl-N-butylpyrrolidinium chloride, N-methyl-N-butylpyrrolidinium tetrafluoroborate, N-methyl-N-butylpyrrolidi Examples thereof include nium hexafluorophosphate, N-methyl-N-butylpyrrolidinium bis (trifluoromethanesulfonyl) imide, and a mixture of these alicyclic amines.

  The aliphatic amine-based ionic liquid is not particularly limited. For example, N, N, N-trimethyl-N-propylammonium bromide, N, N, N-trimethyl-N-propylammonium chloride, N, N, N- Trimethyl-N-propylammonium tetrafluoroborate, N, N, N-trimethyl-N-propylammonium hexafluorophosphate, N, N, N-trimethyl-N-propylammonium bis (trifluoromethanesulfonyl) imide, hexyltrimethylbisamide, etc. And a mixture of aliphatic amines.

  In general, an aliphatic ionic liquid is used as a concept including an alicyclic ionic liquid, but in the present invention, an aliphatic ionic liquid and an alicyclic ionic liquid mixed together are used. In order to distinguish, an aliphatic ionic liquid does not contain an alicyclic ionic liquid, but shows a chain-like aliphatic ionic liquid.

  The conductive coating material may further contain a curing agent, a filler, or the like as necessary. As the curing agent, for example, generally known curing agents for epoxy resins such as amine compounds may be used. As the filler, for example, an inorganic filler such as silica powder may be used, and a pigment or the like may be further mixed. The conductive coating material may be a one-component type containing a curing agent, or may be a two-component type consisting of an antistatic coating floor material that does not contain a curing agent and a curing agent.

  In the conductive coating material (coating floor 20), an alicyclic ionic liquid (for example, an alicyclic amine-based ionic liquid) and an aliphatic ionic liquid (for example, an aliphatic amine-based ionic liquid). It is good to mix | blend so that the total content of a mixture may become 3 mass%-10 mass% with respect to a solventless type epoxy resin, Preferably, it is 5 mass%. By using this blending amount, it is possible to produce a conductive coating material having sufficient antistatic performance while having high durability and product quality. If the total blending amount of the ionic liquid is lower than 3% by mass, the electrical conductivity may be too low. If the total blending amount of the ionic liquid is higher than 10% by mass, the physical properties of the coating will be lowered and the durability will be reduced. May cause problems.

Such a conductive coating material (coating floor 20) is sufficient between the ground wire 14 (or the conductive coating material that has entered the groove 13) interposed between the coating floor 12 and the underlying coating floor 12. For example, the resistance value (electric resistance value) at an applied voltage of 10 V to 1000 V (room temperature 23 ° C., relative humidity 30%) is on the order of 10 ⁹ Ω, that is, less than 10 ¹⁰ Ω. Good. When the electrical resistance value of the conductive coating material is less than 10 ¹⁰ Ω under the above conditions, the antistatic performance of the coating floor 20 is high enough to suppress electrostatic discharge that causes human pain. It can be.

  As a mixing ratio of the alicyclic ionic liquid and the aliphatic ionic liquid, the weight ratio (alicyclic ionic liquid: aliphatic ionic liquid. For example, alicyclic amine ionic liquid. : Aliphatic amine ionic liquid) is about 30:70 to 90:10, preferably 45:55, to reduce the influence on the coating properties and conductivity of the conductive coating material. Can do. When the weight ratio of the alicyclic ionic liquid to the aliphatic ionic liquid is lower than 30:70 (for example, 20:80), the strength of the coating film may be decreased, and the conductivity may be decreased. When the ratio is higher than 90:10 (for example, 95: 5), the conductivity may be low and sufficient antistatic performance may not be obtained.

  As mentioned above, according to the construction method of the flooring material which concerns on this embodiment, the grid-shaped groove part 13 is formed by rolling the surface of the coating floor 12 formed by apply | coating a flooring material on the foundation | substrate 10. After the formation, a new coating floor 20 is constructed by applying a conductive coating floor material having conductivity from the groove 13 to the coating floor 12.

  Therefore, even in the case of constructing a new coating floor 20 from above without removing the existing coating floor 12 formed of the coating floor material in the renovation work of the building or the like, the conductive coating floor material is used. Since the grid-like groove portion 13 is provided under the formed coating floor 20, for example, from the coating floor 20 to the conductive coating material that has flowed into the groove portion 13 or to the ground wire 14 separately disposed in the groove portion 13. Therefore, the antistatic floor 22 having sufficient antistatic performance can be constructed. As a result, it is possible to construct a new coating floor 20 while leaving the existing coating floor 12, and there is no need to bury the ground wire 14 or the like on the entire surface between the coating floor 12 and the coating floor 20. It becomes possible to construct with. In other words, according to the present embodiment, the static electricity generated on the new coating floor 20 after construction flows into the groove 13 provided on the lower surface side thereof and has a sufficient cross-sectional area. Since the static electricity is removed from the ground wire 14 disposed in the material or the groove portion 13, the conductive performance of the existing coating floor 12 as the base is not related. Therefore, the antistatic floor 22 having sufficient antistatic performance can be constructed as it is without considering the conductive performance of the existing coating floor 12 at the time of renovation of the building, so that work efficiency is also improved. Such a construction method can of course be used at the time of new construction as well as renovation of a building.

  If the ground wire 14 is disposed in the groove 13, the antistatic performance of the antistatic floor 22 can be further enhanced.

  Since the groove portion 13 and the ground wire 14 are concealed by a conductive coating material (coating floor 20) applied from above, the design and antistatic performance are improved even if there is a slight gap or distortion in the lattice spacing. There is no problem. At this time, depending on the construction quality of the groove 13 and the arrangement of the ground wire 14, there may be some variation in resistance value. However, if the person who walks on the antistatic floor 22 can eliminate the charge at a pace of one step during several steps, there is no problem because the increase of the charged potential in the human body can be suppressed.

That is, by using the method for applying the coating material according to the present embodiment, about 10 ⁹ Ω even on the coating floor 20 removed from the groove 13 (earth wire 14), and 10 above the groove 13 (earth wire 14). electric resistance value of approximately ⁷ Omega can be configured antistatic floor 22 with a. For this reason, even if it is the part removed from the groove part 13, sufficient static elimination effect is ensured, and also a higher static elimination effect is obtained by a person stepping on the groove part 13 at a rate of about one step per several steps. Can do. Accordingly, it is preferable to set the groove 13 formation interval (lattice interval) to a pitch of about 50 cm to 150 cm, for example, because high antistatic performance can be secured.

  The conductive coating material constituting the coating floor 20 may be a resin material that is a base material mixed with an ionic liquid, or may be a resin material mixed with a conductive filler. . When a conductive flooring material is produced by mixing an ionic liquid, if an alicyclic ionic liquid and an aliphatic ionic liquid are blended as the ionic liquid, sufficient conductivity is provided. A conductive coating material can be produced. Here, using an alicyclic amine ionic liquid as the alicyclic ionic liquid and using an aliphatic amine ionic liquid as the aliphatic ionic liquid prevents the physical properties of the coating from being deteriorated. It is possible to apply more uniformly, and the durability of the coated floor 20 after application can be improved.

  Moreover, as described above, the resistance value of the antistatic floor 22 can be adjusted to a desired value by appropriately changing the arrangement interval of the groove 13, that is, the ground wire 14, and the antistatic performance of the building is required. Since it can respond flexibly, the construction cost of the antistatic floor 22 and the man-hour of construction work can be managed appropriately.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be freely changed without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 Ground 12,20 Coating floor 13 Groove part 14 Ground wire 16 Ground terminal 18 Anchor pile 22 Antistatic floor

Claims (4)

  After forming a grid-like groove by rolling the surface of the coating floor formed by applying the coating material on the ground, a conductive coating material having conductivity from above the groove to the coating floor A method for constructing a flooring material, characterized in that a new floor is constructed by applying a coating. In the construction method of the coating flooring material of Claim 1,
A grounding material is disposed in the groove, and then the conductive flooring material is applied onto the ground floor from above the grounding wire. In the construction method of the coating flooring material of Claim 2,
The ground wire is formed of a tape-shaped member having conductivity on at least the front surface and having an adhesive surface on the back surface,
The tape-like member has a bonding surface adhered to the bottom surface of the groove, and the surface is placed in contact with the conductive flooring material. In the construction method of the coating flooring material of Claim 2,
The ground wire is formed of a conductive coating material, and the coating floor material construction method is characterized in that:

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