With the continuous development of society, epoxy floor coating manufacturing and painting technology has also made great progress. Compared with traditional surface painting technology, traditional surface painting technology has the following differences: the treatment of substrates is different from traditional painting, which does not pay attention to the treatment of substrates, sometimes concrete is coated with primer without any treatment, and some only do a little. The way to deal with it is to shovel, sweep and remove the dust. 1、对混凝土地面的要求： ⑴混凝土要求平整密实，强度要求不低于C20； ⑵地面平整度一般要求在2M范围内落差不大于2mm；如落差较大，则环氧地坪涂层需加厚以减少落差；⑶如需涂装的地面处于底层，地下水位较高，则混凝土底层应作防水处理。⑷新建混凝土干燥至少三周以上，含水率不高于8%； ⑸也可在水磨石等底材上涂装。
1. Requirements for concrete floor: _Concrete requires flat and compact, strength requirement is not less than C20; _Ground smoothness generally requires a drop of less than 2mm in the range of 2M; If the drop is large, epoxy floor coating needs to be thickened to reduce the drop; _If the ground to be coated is in the bottom layer and the groundwater level is high, concrete will be required. The bottom should be waterproof. _New concrete is dried for at least three weeks with moisture content not higher than 8%. _It can also be coated on terrazzo and other substrates.
2. For the new concrete base material, the following treatment methods are adopted: (1) The purpose of the treatment is to improve the overall smoothness of the ground, remove floating layer and dirt, and obtain uniform rough surface to facilitate the adhesion of the coating. (2) Treatment equipment: self-cleaning ground grinder, vacuum cleaner, etc. (3) Requirements: to achieve a solid ground, no sand holes, caves, while requiring dry, clean, no floating dust, oil, cement sand and other impurities. (4) Procedure: Use the ground grinder to grind the whole once - absorb the dust - repair the large holes, depressions and cracks. For the old lacquer floor, if the old lacquer layer is not firmly adhered, the whole old lacquer layer needs to be removed by ground milling machine (the old lacquer layer below 1 mm thickness can be treated by diamond cutter). Because of the high cost of treatment, if the customer does not require the whole removal of the old lacquer, only loose old coatings will be removed, and surface oil and impurities will be removed. Scientific flooring coating attaches great importance to the treatment of base materials and adopts professional treatment machinery. Because good base material treatment is the prerequisite for achieving excellent flooring engineering, the use of professional epoxy floor grinder to treat the ground has the following advantages:
(1) It can remove the floating dust with poor surface strength, so as to facilitate the penetration of the sealing primer into the substrate and enhance the adhesion between the coating and the substrate.
(2) Because of the special design of the professional equipment diamond grinding tool, the surface of the substrate after grinding has uniform roughness, which can enhance the adhesion between the coating and the substrate.
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