JP2008007344A - Method for repairing artificial marble - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for repairing artificial marble where, even if a coating layer is a thick product, repair can be applied thereto in such a manner that repair marks are not left. <P>SOLUTION: This prevention relates to a method for repairing a defect 3 on the surface or in the vicinity of the surface of artificial marble 1 obtained by forming a coating layer 2 on the surface of a resin molded body composed of a polymer consisting mainly of a thermosetting resin or a thermoplastic resin and an inorganic filler. The part of the defect 3 is removed by wet polishing, thereafter, the removed part is recoated with a coating material same as that of the coating layer 2, and subsequently, the recoated part is finished into a smooth surface equal to the circumference surface by wet polishing. In this way, even in the case the coating layer 2 is thick, repair can be applied in such a manner that repair marks are not left. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for repairing artificial marble formed by coating a surface, and more particularly to a technique for making a repair mark inconspicuous.

  In recent years, artificial marble decorative boards mainly composed of thermosetting resins such as vinyl ester resins, acrylic resins, polyester resins, or synthetic resins of thermoplastic resins have been widely used for wall materials and kitchen ceilings because of their excellent physical properties and luxury. Used as a plate.

  As the artificial marble, a resin composition obtained by adding an inorganic filler such as aluminum hydroxide to a thermosetting resin or a thermoplastic resin is often used, and the resin composition is molded to a predetermined thickness. After cutting into a predetermined size according to the application, the portion corresponding to the decorative surface is polished and used as necessary. The artificial marble produced in this manner is commercialized and widely used in a wash counter, kitchen counter, bathtub, wash bowl, and the like.

  When various defects such as scratches, foreign objects, and foam bites are found on the surface of the artificial marble product or in the vicinity of the surface, conventionally, the artificial marble surface is first cut shallowly or polished using a file, sandpaper, nonwoven fabric, etc. Then, the defect was repaired by removing the defect and then blurring and finishing the vicinity of the removed part in synchronization with the surroundings.

  Here, a coating layer may be formed on the surface of the artificial marble product for the purpose of improving antifouling property and improving ease of care (see Patent Document 1). And also in the artificial marble product which has formed the coating layer in this way, repair was carried out by the method similar to the said method. That is, as shown in FIG. 2, the surface of the artificial marble 1 having the coating layer 2 is cut shallowly, or the defect is removed by polishing with an abrasive 4 such as a file, sandpaper, nonwoven fabric, etc. This is a repair method in which the vicinity is blurred by polishing so as to synchronize with the surroundings, and then the coating layer 6 is formed again to finish.

In the above conventional repair method, products with no coating layer and products with a coating layer of about 2 μm or less can be finished so that the repair marks are not noticeable with little difference from the surroundings. It is. However, when the conventional repair method is performed when the coating layer is about 2 μm or more, there is a problem that a difference in gloss appears between the repaired portion and the surrounding area, and the repair mark is likely to remain.
JP 2006-35049 A

  This invention is invented in view of the said problem, Comprising: It is a subject to provide the repair method of the artificial marble which can be repaired so that a repair trace may not remain even if it is a product with a thick coating layer. It is what.

  In order to solve the above problems, the present invention is applied to the surface of an artificial marble 1 formed by forming a coating layer 2 on the surface of a resin molded body composed of a polymer mainly composed of a thermosetting resin or a thermoplastic resin and an inorganic filler. Alternatively, the defect 3 near the surface is repaired by removing the defect 3 part by wet polishing, and then re-coating the removed part with the same paint as the coating layer 2, and then The artificial marble repair method is characterized in that the coated portion is finished to a smooth surface flush with the surroundings by wet polishing.

  By using such a repair method, even in the case of the artificial marble 1 in which the thick coating layer 2 having a thickness of about 2 μm or more is formed, the gloss difference from the surroundings is small so that the repair trace is not noticeable. It is possible to finish.

  The present invention has an effect that even a product having a thick coating layer can be repaired so that no repair mark remains.

  The artificial marble in the present invention is composed of a thermosetting resin or a thermoplastic resin and an inorganic powder, and additives such as a colorant and a pattern material can be added as necessary. A coating layer is formed by applying and infiltrating a fluorine-based compound on at least one surface of the artificial marble thus configured, thereby forming an artificial marble decorative board. The drying process may be performed at room temperature or may be heated.

  Examples of the fluorine compound used include polytetrafluoroethylene, tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene / hexafluoropropylene copolymer, tetrafluoroethylene / ethylene copolymer, and tetrafluoroethylene. Heterocycle-containing fluoromonomer copolymer, polychlorotrifluoroethylene, fluoroalkyl (meth) acrylate polymer, fluoroalkyl (meth) acrylate and other alkyl (meth) acrylate copolymers, vinylidene fluoride, fluoride Examples thereof include vinylidene and tetrafluoroethylene copolymer, vinylidene fluoride and perfluoroalkyl vinyl ether copolymer, and the like.

  In order to repair the surface of the artificial marble thus produced, first, the defective portion is removed. Specifically, it is removed by using an appropriate abrasive such as a file, sandpaper, non-woven fabric, etc., but at this time, water is dropped and removed by wet polishing.

  After removing the defective portion of the surface portion, the same coating material as that for forming the other coating layer is used, and this is applied to the removed portion and penetrated so that the concave removed portion is recoated. Then, the surface of the re-coating part is finished after the touch is dried, and at this time, water is dropped on the surface of the re-coating part while using a suitable abrasive such as a file, sandpaper, non-woven fabric, etc. Finish to a smooth surface that is flush with the surroundings.

  Thus, in the present invention, both the removal of the defective portion and the surface finish of the recoating portion that fills the removed portion are performed by wet polishing using water. This reduces clogging of the abrasive material both at the time of defect removal and at the time of surface finishing of the recoating portion, thereby facilitating the removal of polishing scratches and facilitating blurring of the boundary between the other coating layer and the recoating portion. Further, since the polishing powder generated during polishing acts as an abrasive, it is prevented that the difference in surface gloss is increased.

  Hereinafter, the present invention will be described in more detail based on examples.

  First, aluminum hydroxide (“CW-308B” manufactured by Sumitomo Chemical Co., Ltd.) is added to a vinyl ester resin (“Prominate P-311” manufactured by Takeda Pharmaceutical Co., Ltd.) at 200 parts by weight with respect to 100 parts by weight of the vinyl ester resin. A resin composition was prepared by blending, adding an appropriate amount of a curing agent (“Percure WO” manufactured by NOF Corporation), and mixing with a stirrer.The resin composition was 30 under a reduced pressure of 2666 Pa (20 Torr). The defoaming process was performed for a minute, and this was poured into a mold, and the mold was heated at 90 ° C. for 70 minutes to cure the resin composition, thereby obtaining an artificial marble molded as a 10 mm thick flat plate.

  After the surface of this artificial marble is polished with an abrasive (“Scotch Bright” manufactured by Sumitomo 3M Co., Ltd.), a paint made of a fluororesin compound obtained by diluting a fluororesin in a fluorinated solvent is applied by spraying or brushing, Dry at room temperature. The surface polishing count is in the range of # 240 to # 1000, and the average roughness is about 0.2 μm to 1.5 μm.

  As shown in FIG. 1 (a), when there is a defect 3 such as a scratch on the surface of the artificial marble 1 on which the coating layer 2 is formed by the paint, water 5 as shown in FIGS. 1 (b) and (c). The surface defects 3 are removed with an abrasive 4 such as sandpaper. Then, after removing the water 5 remaining on the surface, the same paint as that coated on other parts is applied and dried by touching to fill the removed part as shown in FIG. A coating layer 6 is formed.

  Then, after this recoating, as shown in FIG. 1E, the surface portion from the coating layer 6 to the vicinity of the boundary of the surrounding coating layer 2 is polished with the same abrasive 4 while dripping water 5 again. . As a result, as shown in FIG. 1 (f), it is possible to finish the boundary of the repaired portion so as not to cause a sense of incongruity with the surroundings.

(A)-(f) is explanatory drawing which shows the repair method of the artificial marble in embodiment of this invention in order. (A)-(c) is explanatory drawing which shows the repair method of the conventional artificial marble in order.

Explanation of symbols

1 Artificial marble 2 Coating layer 3 Defect

Claims (1)

This is a method for repairing defects on or near the surface of artificial marble formed by forming a coating layer on the surface of a resin molded body composed of a polymer mainly composed of a thermosetting resin or a thermoplastic resin and an inorganic filler. The defective portion is removed by wet polishing, and then the removed portion is recoated with the same paint as the coating layer, and then the recoated portion is finished to a smooth surface flush with the surroundings by wet polishing. Repair method of artificial marble characterized by

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