Melamine is an important organic chemical intermediate product, which is mainly used to manufacture melamine resin. It has excellent water resistance, heat resistance, arc resistance and flame retardancy. Uses: It can be used to make decorative boards, used in aminoplastics, adhesives, coatings, paper reinforcers, textile auxiliaries, etc.
Main applications
(1) Decorative board: it can be made into fire-proof, earthquake-resistant and heat-resistant laminated board, bright-colored, high-strength and heat-resistant decorative board, used as veneer for airplanes, ships and furniture, as well as fire-proof, earthquake-resistant and heat-resistant building decorative materials.
(2) Coatings: After etherification with butanol and methanol, it can be used as the base material of advanced thermosetting coatings and solid powder coatings, and can be used to make metal coatings and advanced amino resin decorative paints for automobiles and electrical appliances.
(3) Molding powder: Melamine plastic can be made by mixing, granulating and other processes, which is not excessive, resistant to contamination, and can still maintain good electrical properties when wet, and can be made into white, fall-proof household utensils, sanitary ware, porcelain-like tableware, electrical equipment and other advanced insulating materials.
(4) Paper: It can be used as a paper treatment agent after etherification with ether to produce high-grade paper such as anti-wrinkle, shrink-proof and non-perishable banknotes and military maps.
(5) Melamine formaldehyde resin mixed with other raw materials can also produce fabric finishing agent, leather tanning agent, polishing agent and waterproof agent, rubber adhesive, combustion improver, high-efficiency cement water reducer, steel desalter, etc.
Xinhuanet Beijing September 2008 1 1 Sunday (Reporter Zhou, Zhang Honghe,,) On the evening of June 1 1 Sunday, the Ministry of Health of China pointed out that many cases of urinary calculi in infants and young children were reported in Gansu and other places recently. The survey found that most children have a history of eating Sanlu infant formula. After investigation by relevant departments, the Sanlu infant formula milk powder produced by Shijiazhuang Sanlu Group Co., Ltd. is highly suspicious.
Xinhuanet Beijing, September 1 1 Sunday (Reporter's Week) Shijiazhuang Sanlu Group Co., Ltd. issued a product recall statement on the evening of June 1 1 Sunday, claiming that some batches of Sanlu infant milk powder that were shipped before August 6, 2008 were contaminated by melamine, and there were about 700 tons on the market.
The Ministry of Health of China reminds the public to stop using this variety of milk powder immediately. Infants who have already eaten this milk powder should seek medical advice in time if they have abnormal symptoms such as dysuria.
In addition, medical institutions in Jiangsu, Shaanxi, Hubei and other places have also treated a number of infants with urinary calculi. All babies are breast-feeding and have taken or are still taking the same brand of milk powder. After careful treatment, most of the children have recovered and been discharged.
According to Huang Songming, vice president of Nanjing Children's Hospital, who once treated children, the hospital found that these children had been fed the same brand of milk powder more or less. Due to the cross phenomenon of milk powder brands fed by some children, the hospital can't draw the conclusion that this brand of milk powder is directly related to kidney calculi.
Professor Sun Xizhao, doctoral supervisor of urology in Nanjing University School of Medicine and Nanjing Gulou Hospital, has successively received 0/0 urolithiasis samples from Nanjing Children's Hospital/KLOC. After examination, it was found that the mixed components of this 10 stone had never been found in China before, and all the patients were breast-fed babies.
According to doctors, the incidence of urinary calculi in infants is very low, and it is very rare for so many infants to have double kidney calculi in a short time.