English
Spray painters have to go through several environments in a day: during paint mixing and gun cleaning, it is mainly the solvent vapor evaporated by the diluent; When painting or drying, there is a large amount of paint mist in addition to solvents; When polishing putty, dust is the main source. The three key points are different. Wearing a mask throughout the entire process can easily prevent it in a certain section.
First of all, it is important to note that paint mist is particulate matter, but solvent based paint mist belongs to oily particulate matter. The KN series is only suitable for non oily particles, while the KP series covers both oily and non oily substances. When spraying paint mist from solvent based paints and varnishes, do not use KN95 or KN100 hard blocks. KP grade filter cotton should be selected for such workstations. Fangdun2907P is a KP100 grade filter cotton with a filtration efficiency of not less than 99.97% for oily and non oily particles. It is made of 150g remelted spray activated carbon cloth, which uses electrostatic adsorption and physical blocking to intercept particles, and also has some odor adsorption ability. Water based paint mist can be treated as non oily, and KN grade filter cotton is sufficient.
Don't ignore the gas side: the concentration of solvent vapor near the paint mixing room, barrel opening position, and gun washing pool is often higher than that inside the spray room, which cannot be solved by filter cotton and needs to be solved by a filter box. In the Fangdun5000 series, 5101 is A1 grade, targeting organic gases or vapors such as benzene, nitrobenzene, and cyclohexane; At the same time, there is acidic gas on site, and 5108 (A1E1) can be selected; For workshops with a variety of gas types, 5107 (A1B1E1K1) has a wider coverage. Low boiling point organic compounds and inorganic gases should be separately prepared according to on-site testing.
Common assembly method: Use a silicone half face mask as the main body, install filter boxes on both sides of the filter positions, and cover the box with a layer of filter cotton. The particles and gases are each responsible for the corresponding filter. For workstations with sparks and splashes such as polishing and sandblasting, a 6101P fully enclosed KP100 dust filter box can be considered.
After wearing it, perform negative pressure and positive pressure tightness checks; Beards, mirror legs, and hat straps will leave gaps when pressed against the fitting surface. Replace the filter cotton if it is contaminated, damaged, or if there is a significant increase in respiratory resistance; Record the date of opening the filter box, and immediately leave the work area for inspection if any odor penetrates. The specific configuration and replacement cycle shall be subject to on-site inspection and professional evaluation.
