Single function infant textiles are far from meeting the needs of modern people. People pay more and more attention to their comfort and functionality. Therefore, new multi-functional infant textiles are becoming more and more popular.
Cotton fabric is the textile product that has the most contact with human body. Cotton fabrics are easy to clean after being washed with detergent after being stained with oil, but some cotton fabrics are not easy to clean once they are stained with oil, although they have good antifouling performance after being treated with organic fluorine antifouling finishing agent.
The residual dirt on the fabric provides a good environment for the survival of bacteria. In addition, the glucose residue on cotton fiber can provide energy for the growth and reproduction of microorganisms under suitable conditions, and microorganisms may lead to the production of bacteria, which is one of the important reasons for people’s illness. Therefore, it is of great significance to research and develop cotton fabrics with antifouling, easy decontamination and antibacterial functions.
In terms of application, it meets people’s basic wearing requirements for fabrics; In terms of ecology, the functions of antifouling and easy removal of dirt reduce the washing time and times and the use of detergent, reduce water pollution and save water; In terms of function, it changes the defect of single function of the product, and expands the development of the product in the direction of multi-function. The product can be widely used in public places such as hospitals, hotels and restaurants; In terms of benefits, it increases the added value of products and brings extremely considerable profits.
Antifouling finishing is usually achieved through water and oil repellent finishing . Generally, the finishing agent with special functions is applied to the fabric through the finishing method of impregnation and dip rolling. It can usually form physical, chemical or physicochemical interaction with the fiber, so as to change the surface properties of the fiber. When the finishing agent reduces the critical surface tension of the fabric to less than the surface tension of water and can not be wetted by water, this finishing process is called water repellent finishing; If the critical surface tension of the finished fabric is further reduced to lower than the surface tension of oil, and the fabric can not be wetted by water or oil, this process is called water and oil repellent finishing .
Water repellent finishing of fabrics has a long history. In the early 19th century, lotion of aluminum soap and paraffin wax has been used for water repellent finishing. In the 1930s, long carbon chain hydrophobic compounds with active groups at one end appeared. In the 1940s, DuPont introduced a green chromium complex water repellent, but the application range is very narrow because of its dark color. Silicone water repellent [10] appeared from 1947 to 1948, which is an important period in the development of water repellent finishing agent. It is better to use polymethyl hydrogen containing silicone finishing agent together with dimethyl polysiloxane. In the 1950s, DuPont first began to use fluoropolymers for water and oil repellent functional finishing of fabrics, and then 3M successfully synthesized fluoroalkyl acrylate copolymers. This kind of finishing agent has obvious advantages and disadvantages. It has excellent water and oil repellency. It feels soft after finishing, but its water washing fastness is poor and the price is not cheap. In order to solve the problem of durability, fluoropolymer is combined with terminated isocyanate, which not only improves its water and oil repellency, but also significantly improves its washing resistance. Therefore, this product has been rapidly popularized and is also the main stream product of water and oil repellent finishing agent at this stage.
