Three-proof coatings are mainly dust-proof, moisture-proof and mildew-proof, but their functions are far more than three. It also has the properties of anti-leakage, anti-shock, anti-dust, anti-vulcanization, anti-salt fog, anti-corrosion, anti-aging and corona resistance.
What kinds of three-proof coatings are there?
1, containing solvent-based acrylic resin three-proof paint
Features: it has the characteristics of dry surface, fast curing time, good three-proof property, low price, transparent color, flexible texture and easy repair.
2. Solvent-free acrylic resin three-proof paint
Features: UV curing, drying in a few seconds to ten seconds, transparent color, hard texture, good chemical corrosion resistance and wear resistance.
3. Polyurethane three-proof coating
Features: crisp texture and excellent solvent resistance. In addition to excellent moisture resistance, it is also stable in low temperature environment.
4. Silicone three-proof paint
The soft elastic coating material can release the pressure well, resist the high temperature of 200 degrees and is easy to repair.
In addition, from the comprehensive consideration of price and performance, there is a cross phenomenon in the above-mentioned three-proof paints, such as silicone modified three-proof paint.
5. Fluorescent three-proof paint
Features: After the fluorescent three-proof paint is applied, the surface irradiated by purple light appears blue, and it is clear and easy to distinguish whether the three-proof paint is applied in place.
Hazard factors of three-proof coatings
1. If the organic solvent in the three-proof paint is xylene, xylene, etc. Benzene has high toxic and side effects, which can irritate eyes and respiratory tract. At high concentration, it has anesthetic effect on the central nervous system. Chemicals like this are harmful to the body,
2. If the organic solvents contained in the three-proof paint are macrolides and alkanes, which have mild or moderate harm, if the product with high concentration is inhaled in a short time, it may cause obvious irritation to the eyes and respiratory tract, hematoma in the eyes and pharynx, dizziness, headache, nausea and vomiting, chest tightness, shortness of breath, weakness of limbs, blurred consciousness, drooping feet, and even restlessness, convulsions or coma. Some of them have hysterical attacks.
3. If the organic solvent of the three-proof paint is slightly toxic, such as long-chain fatty acids and aldehydes, it still has diffusion effect: long-term contact with neurasthenia syndrome may cause abnormal menstrual period in women, and skin contact often produces dry skin, chapped skin and dermatitis.
4. If the organic solvent of the three-proof paint is hydrogen or ether, the harm is very small. Naturally, if it is mistaken for an organic solvent for environmental protection, it is also harmful.
Application of three-proof coatings
1, civil and commercial
Three-proof paint (* * * film coating) can provide protection for electronic circuits in household appliances, so that they can resist:
(1) water and detergent (washing machine, dishwasher, bathroom products, outdoor electronic LED screen)
(2) unfavorable external environment (display screen, anti-theft and fire alarm devices, etc.). )
(3) Chemical environment (air conditioner, dryer)
(4) harmful substances in office and home (computers, induction cookers)
(5) All other circuit boards requiring three-proof protection.
2. Automobile industry
The automobile industry requires three-proof paint to protect the circuit from the following hazards, such as gasoline evaporation, salt spray/brake fluid, etc. The application of electronic system in automobile is increasing rapidly, so the use of three-proof paint has become the basic requirement to ensure the long-term reliability of automobile electronic devices.
3. Space
Due to the particularity of the use environment, the aerospace environment has very strict requirements for electronic equipment, especially under the conditions of rapid pressurization and decompression, it is still necessary to maintain good circuit performance. Therefore, the pressure stability of three-proof paint is widely used.
Step 4 sail
Whether it is fresh water or salty sea water, it will do harm to the circuit of ship equipment. The use of three-proof paint can protect the water surface and even submerge underwater equipment to the maximum extent.
5. Health care
Three-proof paint can protect electronic equipment from external chemicals and special use environment, and ensure its continuous stability.