Recently, when posting videos, people often leave messages asking whether polyurethane foaming is poisonous? Is it harmful to the body?
For someone who doesn’t know this, it may be that he has heard or watched related videos from , TikTok, or elsewhere. But I don’t know much about it. When I see the spraying master fully armed, I often ask, is it poisonous? Why would it be so tight if it is not poisonous? Here I will give you a detailed introduction!
polyurethane spray foaming construction site
polyurethane foaming is a polymer formed by using isocyanate and polyether as the main raw materials. Through high-pressure polyurethane spraying equipment, under the action of foaming agent , flame retardant, catalyst and other auxiliary agents, the two liquids hit at high speed and rotate violently in a mixing room with a very small space, mixing thoroughly, forming fine mist droplets at the spray gun mouth, uniformly spraying on the surface of the object, and forming a polymer polymer formed by foaming on site.
is generally used in cold storage cooling, roof exterior wall insulation, color steel tile ceiling, containers, pipelines, storage tanks, plates and other fields.
First of all, let me explain whether polyurethane foaming is toxic? After the
qualified polyurethane foam is formed, the foam is not toxic, and its volatile odor is mainly ammonia, and there will be no odor after 24 hours. Formaldehyde and other harmful substances also do not exist. There will be no reaction when directly touching the skin. Although the unqualified polyurethane also comes into contact with the skin directly, over time, it is prone to allergic symptoms and even produces harmful substances that are moderate to the human body. Therefore, whether polyurethane is toxic or not depends on the quality of the product.
Then why should the spraying master be fully armed during the spraying process?
Although polyurethane foam is not toxic after forming, polyurethane raw material is a chemical object after all. When the raw material is sprayed or heated, it will be harmful if inhaled. will cause skin allergic reactions, which will also lead to respiratory allergic reactions and lung damage . Therefore, friends who have been engaged in on-site foaming work for a long time must wear a mask. If they don’t, they will inhale some harmful gases, which will have a certain impact on the respiratory tract and will be infected with tracheitis , pneumonia, pneumoconiosis, etc. It will not affect other organs, please rest assured, and you mostly use MDI, which is not as poisonous as TDI.
In daily life, some sofas, refrigerators, water heaters, water tanks, pillows, car steering wheels and other common items are made of polyurethane materials, but there is actually no problem. If you are really worried, you can find a testing agency to inspect, or you can ask the manufacturer for a test report when purchasing raw materials.
Although the molded polyurethane foam itself is non-toxic, no material can be 100% pure unless it is used directly from nature.
No chemical product can guarantee 100% purity. The fabric also has odor and chemical residues, so it should be cleaned and used; polyurethane products should also be ventilated and evaporated as much as possible.
Of course, whether it is harmful to the human body or toxic, it depends on whether the raw materials you choose are qualified.
So what should you pay attention to when purchasing polyurethane foaming raw materials?
During the purchase process, you may as well smell it. High-quality polyurethane foaming materials have almost no pungent smell, while inferior products smell very bad. You can also check the environmental protection inspection to see if it meets the requirements of relevant departments. Normally, qualified products come with relevant testing certificates, providing customers with more protection.
But no matter where you choose polyurethane to be used, you should choose high-quality raw materials. During the construction process, it will not harm the health of the construction personnel, will hardly release bad gases, and will not easily pollute the environment. Such products are more worthy of selection and use, and should be promoted on a large scale.
The last question, is polyurethane foam toxic after burning?
Polyurethane foam is a flame-retardant self-extinguishing material after adding flame retardant. Its softening point can reach more than 250 degrees Celsius and will only decompose at higher temperatures: In addition, polyurethane will form carbon deposits on the surface of its foam when it is burned, and this layer of carbon deposits helps isolate the foam below. Can effectively prevent the flame from spreading. Moreover, polyurethane does not produce harmful gas at high temperatures.
experiments have proved that the toxic gases produced during the combustion of polyurethane foam are not more than the common nitrogen-containing substances, such as wool, acrylic , synthetic wood, etc. The same volume of splines made of polyurethane hard foam and soft foam materials are produced under this condition. The decomposition product produced by the decomposition product is comparable to the hazardous substances produced by wood burning, and is lower than the hazardous substances produced by felt and leather under the specified combustion conditions.
In fact, the gases released during the combustion of polyurethane foam are mainly carbon monoxide and nitrogen-containing oxide ; only when oxygen is insufficient, hydrogen cyanide will be produced due to heat decomposition.
The above are some knowledge points about the harm of polyurethane foaming to the human body compiled for everyone. I hope it can help you. If some of them are not mentioned, please leave a message in the comment area to add it! ! !
If you are interested, you can follow my Douyin account JNJX87221, Kuaishou account jiuxu13573193765, and there will be related videos about polyurethane, polyurea construction
