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甲醛应用领域

网址:www.chujiaquan58.com  2019-12-09  作者:admin    阅读:

甲醛应用领域
Formaldehyde application field
甲醛化学工业
Formaldehyde chemical industry
用于生产聚甲醛(POM)。一般,甲醛溶液(55%)需经浓
It is used to produce POM. Generally, formaldehyde solution (55%) needs to be concentrated
缩至75%以上,进行第一步聚合反应,生成三聚甲醛,然后以三聚甲醛为反应单体,加入适量二氧五环作为共聚单体,进行第二步聚合反应,得到长链聚甲醛,最终通过加入终止剂(羧酸等),通过封闭链端结束反应。经过精加工最终得到聚甲醛塑料颗粒。
Reduce to more than 75%, carry out the first step of polymerization to generate trioxane, then take trioxane as the reaction monomer, add a proper amount of dioxane as the comonomer, carry out the second step of polymerization to obtain long-chain polyformaldehyde, and finally finish the reaction by adding termination agent (carboxylic acid, etc.) through the closed chain end. After finishing, polyoxymethylene plastic particles are finally obtained.
聚甲醛又称“赛钢”,因其性能优良,在工业机械、汽车制造、电子电器等诸多工业领域都有着广泛应用。随着技术发展,POM的性能仍在进一步提高,美国杜邦、日本宝理、中国蓝星集团、神华集团、云天化集团都在该领域积极投入研究,整个POM产业在未来会有很大发展空间。
Polyformaldehyde, also known as saigang, has been widely used in many industrial fields, such as industrial machinery, automobile manufacturing, electronics and electrical appliances, because of its excellent performance. With the development of technology, the performance of POM is still improving. DuPont, Baoli, China Bluestar Group, Shenhua Group and Yuntianhua group are all actively engaged in research in this field. The whole POM industry will have a great development space in the future.
甲醛木材工业
Formaldehyde wood industry
用于生产脲醛树脂及酚醛树脂.由甲醛与尿素按一定摩尔比混合进行反应生成脲醛树脂。由甲醛与苯酚按一定摩尔比混合进行反应生成酚醛树脂。甲醛在木材加工业中不可替代的位置正在被MDI胶取代。
It is used to produce urea formaldehyde resin and phenolic resin. The reaction is carried out by mixing formaldehyde and urea in a certain molar ratio to produce urea formaldehyde resin. The phenolic resin was formed by the reaction of formaldehyde and phenol in a certain molar ratio. The irreplaceable position of formaldehyde in wood processing industry is being replaced by MDI glue.
甲醛纺织产业
Formaldehyde textile industry
服装的面料生产,为了达到防皱、防缩、阻燃等作用,或为了保持印花、染色的耐久性,或为了改善手感,就需 在助剂中添加甲醛。用甲醛印染助剂比较多的是纯棉纺织品,因为纯棉纺织品容易起皱,使用含甲醛的助剂能提高棉布的硬挺度。含有甲醛的纺织品,在人们穿着和使用过程中,会逐渐释放出游离甲醛,通过人体呼吸道及皮肤接触引发呼吸道炎症和皮肤炎症,还会对眼睛产生刺激。甲醛能引发过敏,还可诱发癌症。厂家使用含甲醛的染色助剂,特别是一些生产厂家为降低成本,使用甲醛含量极高的廉价助剂,对人体十分有害。
In order to achieve wrinkle resistance, shrinkage resistance and flame retardancy, or to maintain the durability of printing and dyeing, or to improve the hand feel, formaldehyde should be added to the auxiliaries in the production of clothing fabrics. More pure cotton textiles are used as formaldehyde printing and dyeing auxiliaries, because pure cotton textiles are easy to wrinkle, and the use of formaldehyde containing auxiliaries can improve the rigidity of cotton fabrics. Formaldehyde containing textiles, in the process of people's wearing and use, will gradually release free formaldehyde, through the human respiratory tract and skin contact to cause respiratory tract inflammation and skin inflammation, but also to stimulate the eyes. Formaldehyde can cause allergies and cancer. Manufacturers use formaldehyde containing dyeing aids, especially some manufacturers in order to reduce costs, use of formaldehyde content very high low-cost AIDS, very harmful to the human body.
甲醛防腐溶液
Formaldehyde anticorrosive solution
35%~40%的甲醛水溶液俗称福尔马林,具有防腐杀菌性能,可用来浸制生物标本,给种子消毒等但是由于使蛋白质变性的原因易使标本变脆。
35% - 40% formaldehyde solution, commonly known as formalin, has antiseptic and bactericidal properties. It can be used to soak biological samples, disinfect seeds and so on, but it is easy to make the samples brittle due to the denaturation of proteins.
甲醛具有防腐杀菌性能的原因主要是甲醛能跟生物体(包括细菌)蛋白质上的氨基发生反应。
The main reason why formaldehyde has antiseptic and bactericidal properties is that formaldehyde can react with amino groups on proteins of organisms (including bacteria).

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