Causes And Control Of Formaldehyde Content In Textile And Garment

Clothing is an important necessity in people's life. It is called "the second layer skin of human beings". along with science and technology The progress, production development, various styles, various styles, and various kinds of material clothing are endless and dazzling. It plays an important role in health, shaping beautiful shape and displaying overall charm. People's demand is not only on function and performance, but also on its safety performance. Formaldehyde, as one of the mandatory detection indicators, is highly toxic and has strong carcinogenic and cancer promoting effects. Its indicators are controlled by people. Healthy Closely linked, enforce the standard GBl8401 "national textile basic safety technical specification". textile Formaldehyde content was strictly limited.

This standard has improved people's understanding and detection level of harmful substances in textiles, promoted and directed the safety in production and use of textiles in China, and gradually joined up with the European eco textiles. It has important significance for protecting people's health and ecological environment and breaking through the green trade barriers.

The requirement of formaldehyde limit and analysis of the reasons for the failure

Formaldehyde is a prototoxin, can bind to protein, inhalation of high concentration of formaldehyde, there will be severe respiratory irritation and edema, eye pain, headache, bronchial asthma can also occur. Direct contact with formaldehyde can cause dermatitis, stains and necrosis. Inhalation of a small amount of formaldehyde can cause chronic poisoning, such as mucosal congestion, skin irritation, allergic dermatitis, keratosis and weakness of fingernails, fingernail pain at nail bed. General symptoms include headache, fatigue, stomach upset, palpitations, insomnia, weight loss and autonomic nervous disorders.

The mandatory national standard GBl8401, "national textile basic safety technical specification", is based on international standards. The limits of formaldehyde are as follows: infant textiles (diapers, diapers, underwear, pajamas, gloves, socks, tunic, coats, caps, bedding) formaldehyde content should not exceed 20mg/kg, clothing for skin contact (bra, girdle, knitted underwear, shirts, trousers, skirts, pajamas, socks, sheets, quilts) formaldehyde content should not exceed 75mg/kg, clothing that does not touch the skin (sweater, coat, skirt, trousers) and interior decoration (tablecloths, curtains, sofa covers, bedspreads, wall coverings) formaldehyde content should not exceed 300mg/kg. Our country Since 1980s, other countries have also restricted the content of free formaldehyde in textiles.

Almost all the clothing in the process of finishing involves the use of formaldehyde. In order to achieve the functions of crease prevention, shrinkproof and flame retarding, or to maintain the durability of printing and dyeing, or to improve the handle, it is necessary to add formaldehyde to the fabric. If these resins are not properly fixed on textiles, they will release a lot of formaldehyde. The reasons are as follows:

Production enterprises to reduce costs, resulting in formaldehyde content of finished products failed. The main reason for the abuse of formaldehyde is its low price, and the price of 1 tons of formaldehyde is up to 1600 yuan. Over the past few years, the formaldehyde production in China has been increasing year by year, which is consistent with the development of China's textile industry and building materials industry. This shows that formaldehyde is still the darling of China's chemical industry for a long time to come. According to reports, in recent years, formaldehyde free ironing finishing agents have been developed in our country. However, this kind of finishing agent has not been put into production in large quantities. The main reason is that the price is high. It is very harmful to human body.

When finishing with formaldehyde finishing agent, the post-processing is not enough. When the resin was finished, the proportion of monomer was not reasonable, which resulted in the high content of free formaldehyde in the solution. The amount of catalyst is too low, the baking temperature is too low, and the time is too short, so that the crosslinking of resin is not enough, and the residual formaldehyde concentration on the fabric is too high.

The service industry despises the inherent quality of products, pays attention to the appearance of products, and leads to the flow of substandard products. Due to management errors and lack of knowledge, some shopping malls cause unqualified products produced by production enterprises to circulate.

Generally, textiles are easy to contain formaldehyde, ironing products, printing and dyeing fabrics, adhesive lined products, composite fabrics, coated fabrics, flocking cloth and special finishing textiles. These clothes, which are treated by ironing, waterproof and crease resistant processes, are commonly used in the production process. The amount of formaldehyde should be measured by specialized instruments. It is very difficult for ordinary consumers to draw conclusions from their own judgement. Consumers often only pay attention to the appearance of products and neglect the requirements of product safety and technical indicators, so that the shopping mall only pays attention to the appearance of the products and ignores the technical indicators related to human health and life safety. Some purchases have adopted the form of tendering, but only require qualification certificates, and no product inspection reports, or only entrusted inspection reports with incomplete inspection items. There is no safety test result.

Control methods and suggestions for formaldehyde content

Only by analyzing the reasons for the unqualified formaldehyde content, can we effectively reduce the unqualified rate of formaldehyde content in textile and clothing. Stopping the excessive formaldehyde content of textiles is not a part of the matter, and must be strictly checked in all links.

1. production enterprises should improve their quality awareness. Managers should pay attention to internal quality and actively improve management level. Fabric enterprises in particular should strengthen the level of process control, especially in printing and dyeing enterprises, and strictly control the formaldehyde content in auxiliaries. When clothing enterprises purchase fabrics, they should check and detect whether the formaldehyde content of fabrics is over standard. Some clothing enterprises only use formaldehyde additives as resin treatment after garment forming. This means that we must grasp the limitation of formaldehyde content in different garment auxiliaries.

2. the textile and garment operators also have the responsibility to control the last pass in the circulation field. Whether fabric enterprises or clothing enterprises, the formaldehyde content should be indicated when the products are released. When purchasing, in addition to requiring qualification certificates to manufacturers and sellers, it is also required to obtain the qualified inspection reports issued by relevant authoritative inspection departments for the same batch of products, and make a sample inspection of the products supplied.

3. the relevant law enforcement departments of the state should intensify monitoring and investigation. We should vigorously publicize relevant national standards and laws and regulations. Enterprises for the production and sale of formaldehyde over standard Textile and clothing must deal with the supervision of the process of production, sale and use according to law so as to ensure the interests of consumers.

The control of formaldehyde content is not a difficult problem in technology. As long as the layers are strictly checked, the problem of excessive formaldehyde content in textile and clothing will be solved, and people's health will be guaranteed.