1. Use safety of hazardous materials:
Focus on the common sense of safe use of TDI, and pay special attention to A1
(1) TDI has strong reactivity and toxicity, so it must be very careful and clean in operation. Because TDI is easy to react with ammonia, alcohol, water, carboxylic acid and other active hydrogen containing chemicals, it is necessary to strictly avoid contact with these substances in operation and storage.
(2) TDI is very easy to combine with protein, which can stimulate skin and mucous membrane (eyes and bronchi). Therefore, during operation, the staff must wear rubber gloves and masks, and in special cases, they must wear protective coats to prevent accidents. At the same time, the operator should be in the downwind direction of TDI exhaust.
(3) When TDI overflows, wipe it off with foam immediately. And take liquid detergent to make the ground clean. The contaminated foam cannot be discarded at will, and must be disposed of as soon as possible.
(4) When the skin comes into contact with TDI, wash it with ethanol or methanol or a large amount of water, then wash it with soap, and then take a shower.
(5) When inhaling the steam, if the inhalation time is very short, you should go to the fresh place immediately. If the inhalation amount is large, artificial respiration or oxygen supply should be carried out immediately.
(6) When splashed into the eyes, wash with water for 15 minutes to make it clean, and then ask the doctor for examination.
(7) When TDI is contaminated on clothes, it must be treated with liquid detergent, and then washed thoroughly with water.
(8) For the sake of safety production, ensure that the TDI content in the air in the workshop does not exceed the specified index (0.02ppm) when TDI is used in production. Exhaust equipment must be installed in the workshop to timely discharge the waste gas polluted by TDI out of the workshop.
(9) The exhaust gas must be treated to eliminate the toxic components, otherwise the environment around the workshop will be seriously polluted.
(10) TDI waste gas has the following treatment methods. Namely combustion treatment, water treatment, activated carbon adsorption treatment, heavy oil absorption machine burning treatment, contact decomposition treatment, water vapor treatment.
2. Fire protection:
Polyurethane soft foam plastics are mainly used for mattresses, furniture, carpets, shoes and hats, clothing, bags, cars, toys and electrical appliances. Polyurethane soft foams are organic substances, which are nontoxic in nature. But their ignition points are low. They are easy to ignite and are not easy to extinguish when exposed to open fire. They often release toxic gases during combustion and cause more serious damage to environment and application objects. Therefore, the production plant should strictly manage the fire source and prohibit fireworks in the plant area. In addition, the process of sponge production is an exothermic chemical reaction process. The lower the density of sponge, the higher the internal accumulated temperature and the faster the temperature rises. Therefore, it is safe for low-density sponge to detect the internal accumulated temperature. Generally, the internal accumulated temperature is below 175 ℃ and the temperature drops in a period of time, otherwise, fire prevention measures must be taken.