JP2008237965A - Surface repairing method of flooring material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a repairing method at the time of surface coating of a flooring material by easily removing foams in the coated film generated by air entrained in a coating material in the coating step. <P>SOLUTION: The surface repairing method of a flooring material is a method for removing foams 1 formed in the coated film 2 in the surface coating step of a flooring material and involves emitting laser at a pin-point to the foams 1 in the coated film 2 from the surface side of the coated film 2 to remove the foams 1, filling the traces 4 of the foams with hot-melt resin 5 to repair the surface of the coated film. The wavelength of the laser is controlled to be 193 nm to 10.6 μm. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for repairing a flooring. More specifically, the present invention relates to a method of repairing by removing bubbles generated in a coating film when a surface of a flooring material is coated to make a product.

  Conventionally, floor materials are generally finished through painting processes such as undercoating, intermediate coating, and finish coating. However, in coating processes such as roll coating and brush coating, air is often involved in the coating material, and the air staying in the coating material becomes bubbles, which often deteriorates the quality of the coating film.

  At this time, in a known repair method, bubbles appearing on the surface are polished and removed together with the surroundings, and the polished surface is painted again. For example, as shown in FIG. 2, first, the coating film 11 covering the bubbles 1 having a diameter of about 1 mm generated in the coating film 2 of the coating applied to the flooring substrate 3 is removed and crushed. Next, a wide range having a diameter of about 10 mm centering on the bubble 1 is polished with a grinder or the like, and then the polishing surface 31 of the flooring substrate 3 is brought out, and the repair coating 6 is applied to the surface of the polishing surface 31. Therefore, there is a problem that it is necessary to repaint a wide range, which is troublesome and the workability of the finishing process is deteriorated.

  On the other hand, lasers generated from laser generators are well used in industrial processing fields because they have good phase characteristics and excellent convergence, so they can concentrate very high-density light energy in a small area. It has been. For example, Patent Document 1 listed below discloses a technique aimed at forming a strong film on the surface of a building material substrate using a laser. That is, a building material in which a surface adhering material mainly composed of an inorganic substance is adhered to the surface of a building material base material and a surface layer is melted by irradiating a laser to form a strong film, and its surface treatment A method is disclosed.

That is, the technique described in Patent Document 1 irradiates a laser with high output enough to melt silicon oxide or aluminum oxide used as a surface adhering material, and produces Otani stone, anti-fluorite, sandstone, or cellular foam concrete (ALC). ), The surface layer is weak, and the surface of the base material that tends to be peeled off or cracked is reinforced.
Japanese Patent Laid-Open No. 6-80485 (pages 1 to 3, FIG. 1)

  Also, since the laser is effective when opening holes in the oblique direction, if the output of the laser is reduced and the bubbles generated in the coating film are irradiated, the coating film covering the surface of the bubbles is removed. Is possible. However, since the trace remains on the coating film after the bubbles are removed, it is necessary to perform a post-treatment, and it is difficult to remove the bubbles only with a laser.

  The present invention has been conceived under such circumstances, and when a flooring is finished as a product by surface coating, it was caught in a paint in a coating process such as roll coating or brush coating. It is an object of the present invention to provide a method for easily removing and repairing bubbles in a coating film generated by air.

  In order to solve the above problems, the present invention takes the following technical means. That is, according to the invention described in claim 1, a method of removing bubbles formed in a coating film in a surface coating process of a flooring and repairing a trace after the removal, from the surface side of the coating film There is provided a method for surface repair of flooring by irradiating a laser at a pinpoint toward the bubbles in the coating film, removing the bubbles, filling the bubble marks with hot melt resin, and repairing the surface coating film. The

  In the floor covering surface repair method according to claim 2, in addition to the invention according to claim 1, the wavelength of the laser is 193 nm to 10.6 μm. The laser is not particularly limited, and excimer laser, YAG laser, CO laser, carbon dioxide laser, He laser, Ne laser, and the like can be used. Of these lasers, a gas laser that is small and relatively easy to handle, such as a carbon dioxide laser, a He laser, a Ne laser, or the like is preferably used. Further, since only the coating film covering the bubbles needs to be removed by heat, the output is used at a low output, for example, a low output of 1 W or less. If the output is increased, not only the coating film but also the flooring base material may be damaged. Therefore, it is usually preferable to irradiate with an output of several mW or several hundred mW.

  In addition to the invention described in claim 1, the hot melt resin is used as a hot melt adhesive. The hot melt adhesive is not particularly limited, and is based on EVA (ethylene vinyl acetate copolymer), PP (polypropylene), PA (polyamide), SR (synthetic rubber), high-purity aromatic resin, aromatic Petroleum resin, hydrogenated petroleum resin or the like is used. Since these softening temperatures are usually in the range of 65 ° C. to 150 ° C., for example, the molten hot melt adhesive is extruded and used by heating with a hot melt gun. The hot melt adhesives may be used alone or in combination.

  The method of repairing the surface of the flooring according to the invention described in claim 1 is as described above, and the bubbles formed in the surface coating film of the flooring are removed by laser irradiation at a pinpoint. In addition, unlike the conventional polishing repair, it is not necessary to polish a wide range including air bubbles to obtain a polished surface, and the repair can be minimized. Further, since the repair can be performed only by filling the bubble mark with the hot melt resin, it is possible to eliminate the whitening of the coating film and the occurrence of the polishing streak observed in the conventional polishing repair.

  The floor surface repair method according to claim 2 is as described above, and in addition to the effect of the floor surface repair method according to claim 1, the wavelength of the laser is 193 nm to 10.6 μm. Using this laser generator, small bubbles generated in the coating film of the flooring can be easily removed by heat at a pinpoint.

  The surface repair method for flooring according to claim 3 is as described above, and in addition to the effect of the surface repairing method for flooring according to claim 1, the hot melt resin is a hot melt adhesive. The hot-melt adhesive in the form of a stick can be repaired without feeling uncomfortable with the surrounding coating film by filling the bubble marks while heating and melting using a hot-melt gun. In addition, due to the adhesiveness of the hot melt adhesive, once filled, there is little risk of peeling off, and it can be firmly adhered and repaired in the minimum range.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory diagram showing a schematic configuration of a floor material surface repair method according to the present invention. As shown in FIG. 1, first, in the step of painting the flooring substrate 3 at the stage of removing bubbles, the bubbles 1 having a diameter of about 1 mm generated in the coating film 2 are irradiated with the laser from the laser generator L. At this time, irradiation is performed with a pinpoint of several to several tens of mW so as to open a hole in the coating film 11 covering the bubble 1 in the oblique direction.

  The bubble 1 is removed by heat by laser irradiation, but the bubble mark 4 remains after the removal. Therefore, the hot-melt resin 5 is filled in the bubble trace 4 as a bubble trace filling stage. The hot melt adhesive used as the hot melt resin 5 is heated to a softening temperature thereof, for example, about 100 ° C. by a hot melt gun or the like. The hot melt adhesive that is heated and has fluidity is extruded from the hot melt gun and filled into the bubble marks 4. After filling, the bubble scar 4 can be easily repaired by flattening the surface.

  Since the hot melt adhesive has adhesiveness as well as hot melt properties, it adheres firmly to the bubble marks 4 and does not easily peel off. In this way, the bubble 1 generated in the coating film 2 in the coating process is removed in two stages, the bubble removal stage and the bubble mark filling stage, and the bubble mark 4 generated after the removal is filled with the hot melt adhesive in the minimum range. Therefore, it can be repaired to the extent that it cannot be distinguished from the surrounding coating film 2. In the above embodiment, the case of the bubble 1 having a diameter of about 1 mm has been described, but the method of the present invention is applicable to the case of a small bubble having a diameter of 0.1 mm to several mm regardless of this. All are within the technical scope of the present invention without departing from the scope of the claims.

It is explanatory drawing which shows schematic structure of the surface repair method of the flooring of this invention. It is explanatory drawing which shows schematic structure of the surface repair method of the conventional flooring.

Explanation of symbols

L Laser generator 1 Air bubble 11 Coating film 2 covering the bubble Coating film 3 Floor material substrate 31 Polishing surface 4 Bubble mark 5 Hot melt resin 6 Paint for repair by conventional method

Claims (3)

  It is a method of removing bubbles formed in the coating film in the floor coating process and repairing the traces after the removal. A laser is focused on the bubbles from the surface side of the coating film toward the bubbles in the coating film. A method for repairing the surface of a floor material, which is performed by irradiating and removing the bubbles, filling a bubble mark with a hot melt resin, and repairing the surface coating film.   The floor repair method according to claim 1, wherein the laser has a wavelength of 193 nm to 10.6 µm.   The method for repairing the surface of a flooring according to claim 1, wherein the hot melt resin is a hot melt adhesive.

Images