In Jinan, apart from formaldehyde, it has already become a widespread cognitive ability for people to "newly decorated houses have indoor formaldehyde". Many people do not know the source of formaldehyde. In fact, at this stage, indoor formaldehyde will exist in all areas of clothing, food, housing and transportation, and fully understand pollution. After the source can be targeted to avoid, scientific aldehyde removal, farewell to "talk about aldehyde color change".
Although formaldehyde is ubiquitous, it does not need to talk about formaldehyde color change. Data show that indoor formaldehyde is vapor at room temperature and generally appears in solution mode. Formaldehyde solution is also formalin solution with concentration of 35-40%. Formalin solution has anticorrosive effect. Therefore, indoor formaldehyde is also used as additives, disinfectants, cleansers, insecticides and other crafts, including skin care products, printing ink, paper, etc. Zhang et al may also contain formaldehyde.
Apart from the anti-corrosion effect, because indoor formaldehyde can whiten, change color, enhance ductility and brittleness, although indoor formaldehyde is a strictly prohibited preservative in food, there are still illegal traders who use indoor formaldehyde to soak fresh shrimp, sea cucumber and seafood, use formaldehyde to fumigate or directly add to pasta, mushrooms or soybean products.
In addition, fuel combustion and ignited cigarettes may produce formaldehyde, which is estimated to emit about 2.4 mg of formaldehyde per cigarette.
In response to the ubiquitous sources of indoor formaldehyde in daily life, natural environment experts believe that the first view that "if you touch indoor formaldehyde, you will definitely get sick" is incorrect. It also depends on the concentration of space and the level of sensitivity of the body. It is not necessary to mention indoor formaldehyde to worry; secondly, when you buy things, you should give priority to more environmentally friendly and safe items, and fundamentally control formaldehyde pollution. Attention should be paid to timely discovery of pollution sources and scientific treatment of pollution.
New clothes also contain formaldehyde? Immersion can effectively remove formaldehyde? Reporters found in interviews, compared with almost everyone knows that decoration may bring formaldehyde pollution, more than 50% of the respondents did not know that clothes, curtains and other textiles may also contain formaldehyde.
It is reported that in the garment industry, indoor formaldehyde is mainly used as dye modifier and epoxy resin finishing agent to enhance the practical effect of wrinkle resistance and shrink resistance. It can make the color of chemical fibers and textile crafts bright and beautiful, maintain the performance of clothing printing and dyeing agents, and make cotton fabric wrinkle-resistant, shrink-resistant and flame-retardant.
Therefore, formaldehyde is often used in textile industry. Rigid and non-iron clothing, especially some jeans, wrinkle-resistant and shrink-resistant clothes or cotton non-iron shirts, may contain formaldehyde. Carpets, curtains, indoor textiles, car seat covers and cushions may also contain formaldehyde.
Although these articles contain formaldehyde, their content is generally far lower than that of decoration materials, but clothing and home textiles are directly in contact with the human body and are easily inhaled from the mouth and nose when volatilizing. Therefore, caution should be taken. Industry insiders suggest that because formaldehyde itself is soluble in water, new clothes should be better immersed in clean water for more than half an hour, then washed and dried, or even washed once or twice. Re-wearing, especially children's clothing, is to be cleaned and re-worn. Other textiles can also reduce the possibility of formaldehyde pollution by washing and air-drying.