Paint knowledge | precautions for floor paint construction

Core tip: the floor paint adopts one-time coating process, no matter how large the area is, there is no joint, and it is also a dust-free material, with strong adhesion, wear-resistant, strong hardness and other characteristics, which has been widely used in China at present The epoxy floor coating can be divided into solvent type and solvent-free type A certain amount of volatile organic compounds will be discharged during the production, construction and curing of solvent based epoxy floor coatings（ VOC), but the cost is relatively low; and solventless epoxy floor coating conforms to the concept of environmental protection, no VOC emissions It is widely used in the finishing of modern industrial floor Construction technology of floor paint I base surface treatment 1 Foundation element Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Home of coatings: the floor paint adopts one-time coating process, no matter how large the area is, there is no joint, and it is also a dust-free material, with strong adhesion, wear resistance, strong hardness and other characteristics, which has been widely used in China at present The epoxy floor coating can be divided into solvent type and solvent-free type In the production, construction and curing process, solvent-based epoxy floor coating will emit a certain amount of volatile organic compounds (VOC), but the cost is relatively low; while solvent-free epoxy floor coating conforms to the concept of environmental protection, no VOC emissions It is widely used in the finishing of modern industrial floor Floor paint construction process I, base surface treatment 1, base plain to cement powder smooth or ground stone 2 The plain land shall be kept for more than 28 days, and the water content shall be less than 8% before construction If there is any unevenness or hollowing of the plain land, it shall be removed 3 Remove the cement laitance, old paint and adhered garbage on the surface 4 Thoroughly remove the oil stain on the surface and treat it with the king oil cleaner 5 Remove the accumulated water and dry the tide thoroughly 6 Clean the surface with a dust-free cleaner and a large vacuum cleaner 7 The allowable clearance of the flat surface is 2-2.5mm, the water content is below 6%, and the pH value is 6-80 8 The roughening of the floor surface needs to be completed by a dust-free grinder and cleaned thoroughly by a vacuum cleaner 9 Level the ground with epoxy mortar 10 Apply putty to fill and scrape the holes and obvious depressions on the floor surface, and polish and dust after dry 11 Before construction, keep the construction site dry and clean Construction process of floor paint II Finishing and sealing coating 1 In the treatment of clean and flat concrete surface, high-pressure airless spraying or roller coating is adopted, and one layer of epoxy sealing primer is applied 2 Epoxy sealer has strong permeability When applying primer, a certain amount of diluent shall be added to make the diluted primer penetrate into the base layer and enhance the adhesion between the coating and the base layer The coating must be continuous and uninterrupted, and the coating amount shall be subject to the surface just saturated 3 Local missed coating can be repaired by brush, and the redundant primer on the surface must be polished before the construction of the next process Construction process of floor paint III batch scraping and scraping 1 Apply two coats of putty on the primer surface after dry (25 ℃, about 4 hours) to ensure the wear resistance, pressure resistance, collision, water, mineral oil, acid-base solution and other properties of the floor, and adjust the ground flatness 2 Use 100-200 mesh quartz sand and epoxy batch scraping material as the first layer of putty, which should be fully stirred evenly and scraped flat This layer is mainly used to enhance the wear resistance and compression resistance of the ground 3 Use the sand bag type dust-free rolling sander to polish the first layer of putty, and vacuum clean 4 Use 200-270 mesh quartz sand and epoxy batch scraping material as the first layer of putty, which should be fully stirred evenly and scraped flat This layer is mainly used to enhance the wear resistance and flatness of the ground 5 Use the sand bag type dust-free rolling sander to polish the second layer of putty, and dust clean 6 After two layers of putty are dry, if there are pockmarks and cracks, repair them first, and then polish them with a flat sanding machine to make them flat and clean them with dust 7 The quantity of quartz sand used shall be determined by Chengmei coating field engineer according to the specific situation of the ground Construction process of floor paint IV coating the intermediate layer of floor paint 1 Coating the intermediate layer with epoxy floor paint on the polished and cleaned putty surface (20 ℃, 24 hours) The coating method can be brush coating, batch scraping, high-pressure airless spraying For large-area construction, high-pressure airless spraying is the best, and the spraying pressure is 20-25mpa 2 This time can make the ground more flat, more convenient to find the defects still existing on the ground, so as to facilitate the construction and leveling of the next layer 3 This time also facilitates Party A's arrangement of equipment installation, etc Floor paint construction process v paint the floor paint surface 1 After the middle layer is dry, apply the epoxy floor coating The coating method is batch scraping and high-pressure airless spraying, but high-pressure airless spraying is suitable 2 Before coating, the middle layer shall be polished and vacuumed by the sand bag type dust-free rolling grinder 3 If Party A has carried out the installation and commissioning of the equipment after the middle layer is dry, resulting in new defects on the ground, it shall be leveled and polished with a batch of scraps, and the surface layer shall be sprayed after dust collection and cleaning Environmental factor is the most important condition in floor paint construction Because the construction environment temperature and humidity are often uncontrollable, the floor paint in large-scale construction, often has a great dependence on the environmental conditions Influence of temperature on floor construction: too low temperature Many two-component coatings are difficult to cure in the environment with temperature lower than 5? C, or the reaction is very slow, which will seriously affect its curing performance For example, the coating is very slow to dry, dust and other impurities are easy to pollute its surface, resulting in poor decorative effect; Too slow curing will also affect the performance of the coating, reduce its hardness and wear resistance, which directly affects the service life of the floor The temperature is too high It will increase the consistency of the coating, dry end scrap, and even explosive polymerization Generally, we use a small number of times to match the paint, or choose a diluent with high boiling point and slow volatilization for adjustment Influence of humidity on floor construction: humidity refers to the content of water vapor in the air at a certain temperature According to experts, generally, when the humidity exceeds 85%, construction cannot be carried out, because too high humidity is easy to cause coating defects such as whitening and cracking The humidity indication only affects the floor coating when it is too large, but its influence is often greater than people's imagination If the humidity is too high, it will cause condensation on the coating surface, and the condensed water will cause damage to the curing agent, resulting in whiteness, loss of light, stickiness and stickiness of the coating film Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,