Paint knowledge: what is the harm of water paint

Core tip: the harm of water paint paint contains formaldehyde and other organic components, which are harmful to human body when released into the air More causes some allergic reactions of respiratory tract, and may be related to the occurrence of some malignant tumor diseases! The main harmful components of paint are: formaldehyde is a colorless and soluble irritant gas Particleboard, density board, plywood and other artificial boards, adhesives and wallpaper are the main sources of formaldehyde in the air, with a release period of 3-15 years It can be absorbed by respiratory tract The harm of formaldehyde to human body is long-term, latent and hidden Formaldehyde can cause discomfort in nose, pharynx and throat, burning, coughing and breathing Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Paint Home News: water paint harm paint contains formaldehyde and other organic components, these substances released into the air have a certain harm to the human body The main harmful components of paint are: formaldehyde is a colorless and soluble irritant gas Particleboard, density board, plywood and other artificial boards, adhesives and wallpaper are the main sources of formaldehyde in the air, with a release period of 3-15 years It can be absorbed by respiratory tract The harm of formaldehyde to human body is long-term, latent and hidden Formaldehyde can cause discomfort in nose, pharynx and throat, including burning, cough, dyspnea, headache, upset and nasal mucosa erosion Long term inhalation can lead to a variety of serious diseases such as NPC and laryngeal cancer Benzene is a colorless gas with special aromatic smell Glue, paint, coating and adhesive are the main sources of benzene in the air When benzene and its derivatives are inhaled by human body, they may appear dizziness, chest tightness, nausea, vomiting, drowsiness and other symptoms, and lead to hematopathy and anemia, blurred vision of central nervous system, irregular heart rate, coma, respiratory and circulatory failure, convulsion, ventricular fibrillation, skin defatting and drying, desquamation, allergic eczema, allergic dermatitis and laryngeal edema It can inhibit human hematopoietic function, reduce red blood cells, white blood cells and platelets, and increase the incidence of aplastic anemia; it can also lead to abnormal menstruation of women and congenital defects of fetus The harm of water paint to TVOC total volatile organic compounds, the abbreviation of VOC, volatile organic compound, VOC in the indoor air as a heterogeneous pollutant, because their individual concentration is low, but there are many kinds, generally not individually expressed, TVOC is the total TVOC includes benzene, toluene, butyl acetate, ethylbenzene, P (m) xylene, styrene, o-xylene, undecanone, etc Indoor building and decoration materials are the main sources of TVOC in the air The research shows that even if the single VOC content in indoor air is lower than its limit content, the mixing and interaction of various VOCs will increase the harm intensity TVOC is toxic and irritant, which can cause immune disorders, affect the function of central nervous system, dizziness, headache, lethargy, weakness, chest distress and other symptoms It may also affect the digestive system, appear anorexia, nausea and so on In serious cases, it can damage the liver and hematopoietic system, and even cause death There are three kinds of harm of aldehyde to human body, the stimulating effect: formaldehyde has a strong stimulating effect on skin and mucous membrane, which can make human eyes dry and astringent, shed tears, blurred vision, edema of nose membrane, discomfort of throat and itching of skin; toxic effect: it can cause nervous system damage such as dizziness, insomnia, fatigue, inattention, memory decline, abdominal pain, nausea, vomiting, general weakness, etc System damage, cough, chest tightness, asthma and other respiratory system damage It can also lead to immunity decline, menstrual disorder, infertility, neonatal deformity, etc children and pregnant women are particularly sensitive to it Carcinogenic effect of water paint: animal experiments show that formaldehyde is not only carcinogen but also carcinogen, which may lead to NPC, lung cancer, skin cancer, leukemia, colon cancer, etc In the paint and coating, there are often some toxic compounds, which will cause certain toxic effects on the environment and human health The common toxic compounds in paint and coating are summarized as follows: toluene and xylene: in solvent classification, they are medium toxic solvents, which have anesthetic and stimulating effects on human body, and toxic effects on nervous system at high concentration, but the residual toxicity in human body is low, which can be generally eliminated by metabolism The maximum allowable concentration in the air is 100mg / m3 People who have long-term exposure to toluene and xylene should not drink white spirit, let alone excessive high level white spirit, because alcohol will prolong its retention time in the body, which is extremely harmful to health The workplace should keep the air circulation to reduce its concentration in the air According to the latest research data, toluene and xylene will produce certain photochemical reaction after entering the atmosphere, which will damage the ozone layer Benzene: it belongs to highly toxic solvent, and a small amount of inhalation will cause long-term damage to human body Benzene can accumulate in the nervous system and bone marrow, damage the nervous system and hematopoietic tissue, reduce the number of white blood cells and platelets in the blood, long-term contact can cause leukemia Glycol ether solvents: glycol ether solvents will form highly toxic compounds after metabolism in the body, which will cause permanent damage to the human blood circulation system and nervous system Long term exposure to high concentration glycol ether solvents will cause cancer In addition, glycol ether solvents will cause permanent damage to the female reproductive system, resulting in female infertility Harm of water paint TDI: TDI has a low vapor pressure, which has a strong irritant effect on human cornea and causes eye redness and swelling TDI vapor will damage the liver and kidney function after inhaled by human body Long term exposure to high concentration of TDI vapor will cause cancer In polyurethane (PU) paint, only when the free TDI of curing agent component is less than 0.5%, it will not cause toxic effect on human body Because at low concentration, free TDI is not easy to escape from the system and can not form toxic TDI vapor In the current national standard, when the free TDI is less than 0.7% after the paint is mixed, the curing agent component is still highly toxic in fact Because the level of domestic TDI polymerization industry is far behind that of developed countries, the national standard range is relatively wide from the perspective of protecting national industry Heavy metals: excessive intake of heavy metals can cause chronic poisoning Heavy metals affect children's growth and development, especially their intellectual development Some heavy metals can remain in brain and internal organs, causing permanent damage to liver and kidney Phthalate plasticizers: these plasticizers are the most widely used plasticizers in volatile paints In the past, they were considered to be harmless to human body for quite some time However, according to the latest research in Europe and the United States, this kind of plasticizer has no obvious adverse effect on adult health, but it will have adverse effects on children's development, mainly resulting in precocious puberty Therefore, in recent European and American standards, it has been clearly stipulated that such plasticizers are prohibited in children's toys VOC: VOC is volatile organic compounds According to incomplete statistics, about 3 million tons of volatile organic compounds are discharged into the atmosphere every year in China's paint industry, which directly pollutes the air environment, destroys the living environment of human beings, damages human health, and causes huge waste of resources, which is not in line with the current economic model of sustainable development Home of coatings focuses on coatings, paint coatings, coating technology, news and information of fire retardant coatings, coatings, coating technology, decoration knowledge and decoration renderings of fire retardant coatings,