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Under the pressure of environmental protection policy, the external pressure of “oil to water” for steel structure production paint is also increasing
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During the fourteenth Five Year Plan period, the collaborative governance of PM2.5 and ozone is one of the key objectives of air pollution prevention and control
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The key is the collaborative emission reduction of NOx and VOC, especially VOC will become the main contradiction and short board of governance
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This means that, like many industries, the raw material end of domestic steel structure industry is also faced with the proposition of changing oil into water
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At present, the upstream and downstream cooperation trend between steel structure enterprises and water paint enterprises is obvious
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Although many steel structure enterprises have included water-based paint into their centralized purchasing list, and VOCs emission has been greatly reduced after using water-based paint products, they still encounter some difficulties: 01
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The unit cost of water-based paint is apparently higher than that of oil-based paint, and it is difficult to make up their mind before the data is established
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02 performance concerns due to short development time, unstable performance and immature formulation, a series of problems such as slow drying, sagging and rust returning after spraying will affect the delivery time
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03
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The construction conditions of water-based paint are strict, humidity and temperature have great influence, and the requirements of construction technology are high
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First of all, in terms of cost control, although the price of water-based paint is slightly higher than that of oil-based paint, at present, with the help of technological progress, the price gap has gradually leveled off
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At the same time, the use of oil-based paint construction, equipment maintenance, and hazardous waste, solid waste management capital investment is much higher, so in the case of similar dosage, the cost of water-based paint investment and hazardous waste solid waste emissions are much lower; the use of paint construction, in the period of environmental safety inspection, may also be subject to complaints, shutdown, rectification and other administrative measures Influence, these recessive loss, to the enterprise, also want to pay very big price
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As for the performance, the surface drying time of the current water-based steel structure paint can be less than 15 minutes in the construction environment of 20 ℃, and less than 10 minutes in the construction environment of 25 ℃
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In the field of long-term heavy-duty anti-corrosion, water-based paint can also be used for supporting coating
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Generally, the coating scheme of Jinye water-based epoxy zinc rich primer + Jinye water-based epoxy micaceous iron intermediate paint + Jinye water-based acrylic acid and Jinye polyurethane anti-corrosion topcoat is adopted
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Now, many properties of water-based steel structure paint have surpassed the traditional solvent based paint
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In terms of construction, “oil to water” should pay attention to the following points, so there is no need to worry about the problems mentioned above, such as sagging, slow drying and rust returning: 1
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The spray gun and delivery pipe should not be mixed with water and oil, but must be water-based
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If it is necessary to spray oil-based paint with equipment sprayed with oil-based paint, the spraying machine, spray gun and pipeline system shall be thoroughly cleaned with oil-based diluent (to make the paint mist colorless and transparent)
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2
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Use special water-based paint and special gun washing water to clean the whole system (spraying machine, spray gun and pipeline) in the same way to ensure that the sprayed paint mist has no solvent smell
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3
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Use tap water to clean the whole spraying machine, spray gun and pipeline again (the paint mist sprayed to the palm is odorless, dry and adhesive)
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4
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When spraying water-based paint, if there is a small amount of shrinkage cavity and edge in the early stage of the sprayed water-based paint film, and the back edge disappears, it means that there is still a trace of oily solvent in the whole system
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Continue spraying and spray and cover after drying
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5
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In autumn and winter, add 5-8% water (weight ratio), in summer, add no more than 10-13% water, control the film thickness > 40 μ M
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The nozzle diameter is 0.4-0.5mm, and the spraying pressure is 3.5-4.0mpa
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6
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The water paint must be fully stirred before use, and the paint bucket shall be cleaned after use and placed at the designated position
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Detailed operation details, Jinye water paint can be deep docking! Jinyeshuiqi micro signal 18903293653, China Merchants telephone 400-180-9177.
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