Interview With Wang Xiaofeng, General Manager Of Shanghai Textile Co., Ltd.

Chair: reporter Tao Lulu

Guest: General Manager Wang Xiaofeng, Shanghai textile (Group) Co., Ltd.

Differentiated products, discourse power and home safety are the words that Wang Xiaofeng impressed by reporters during the interview process by general manager of Teran Business Department of Shanghai textile (Group) Co., Ltd.. It is precisely these words that clearly convey the idea that the polysulfonamide fiber will uphold in the future development of flame-retardant products.

Focusing on the question of "up and down seeking" for fire-retardant fibers, the reporter has introduced the most representative kinds of flame retardant fibers in China in his previous interview. During this period, Wang Xiaofeng has talked with us about another important flame retardant fiber -- the application of polysulfonamide fiber in the field of flame retardancy.

Host: what are the characteristics of the structure of polysulfonamide fiber? How does it obtain flame retardance and heat resistance?

Wang Xiaofeng: polysulfonamide fiber, also known as polysulfone amide fiber, belongs to aromatic polyamide type high temperature resistant synthetic fiber. The polysulfonamide fiber monomer has 25% interposition structure and 75% counterpart structure. Because of the strong introduction of -SO2- on the main chain of polymer, the electron cloud density of nitrogen atoms on amide group is significantly reduced through the double bond conjugation system of benzene ring, thus obtaining the stability of thermal oxidative aging, so that the polysulfonamide fiber has superior flame retardant and heat resistance properties compared with other high-temperature resistant fibers.

Shanghai teunlon Fiber Co., Ltd. has produced the aromatic polysulfone amide fiber manufacturing method with high efficiency and environmental protection. This series of patents has filled the gaps in the field of intellectual property rights in China, which is resistant to 250 degree synthetic fiber technology.

Host: what are the advantages of polysulfonamide fiber? What are the main areas of application?

Wang Xiaofeng: polysulfonamide fiber has good flame retardancy, heat resistance and thermal stability.

The fabrics and garments made of polysulfonamide fiber are of stable size, good heat resistance, heat insulation and fire prevention effect. They will not shrink, melt or break. They can always maintain sufficient strength and wearability under severe weather conditions such as high temperature and high humidity.

Therefore, the new protective products of polysulfonamide can be used not only as a special military uniform, but also widely used in various industries such as spacesuit, fire-fighting clothing, police uniform, racing suit, petrochemical fire protection work clothes, forest work clothes and electric clothing.

Specifically, in the test and Research on the combustion performance of heat resistant, the results of the vertical combustion of polysulfonamide are excellent, the continuous burning time and smoldering time of the polysulfonamide fiber are 0, while the damage length of all fabrics is less than 40mm, which proves that the flame retardancy of the polysulfonamide fiber is superior.

Meanwhile, the limiting oxygen index of polysulfonamide can reach more than 33.

Polysulfonamide is the most excellent dyeing property of aromatic polyamide fibers in the dyeing properties of fibers. Polysulfonamide can be dyed under commonly used high temperature and high pressure conditions. It can be dyed with disperse dyes and cationic dyes. After adjusting the dyeing process, it can also be dyed with reactive dyes. The dyed fabrics have strong luster, higher dyeing rate and lower fabric finishing cost.

After dyeing, the physical properties are maintained well, with good color fastness and environmental protection standards.

Polysulfonamide fiber, yarn and fabric are easily dyed orange, orange, golden yellow, sapphire blue, sky blue, deep blue, dark green, black and many other colors.

In terms of wearability and comfort, polysulfonamide is similar to ordinary textile fibers. It can be processed into yarn, woven fabric, knitted fabric, nonwovens and so on by ordinary equipment. Its density is 1.42g/cm3, and its heat resistant protective clothing is not bulky. It will not interfere with the wearer's action, and has good waterproof and moisture permeability. Its moisture regain is 6.28%. Its heat resistant protective clothing has certain heat and moisture pmission capacity and lower physiological load, which is beneficial to the loss of body heat and sweat evaporation.

Polysulfonamide fibers also have good wear properties such as tensile strength, tear strength, wear resistance and washability. They are widely used in fire, metallurgy, petroleum, aerospace and other fields.

Host: what is the price of the polysulfonamide fiber compared to other flame retardant fibers? What do you think of the flame retardant fiber's "performance improvement and price reduction"?

Wang Xiaofeng: in comparison, the price of polysulfonamide is relatively high at present. But if we look at this problem from a systematic perspective, the purpose of developing high-performance fibers is to use this "high performance" to solve the problems that could not be solved before, or to solve the traditional problems with lower cost.

For example, carbon fiber seems to be a "high price" material for building materials, but when it is used to repair bridges damaged by earthquakes, its cost of maintenance is much lower than that of traditional repair schemes, so the value of "high performance" is reflected.

Moderator: in terms of market application, what aspects of the polysulfonamide fiber should be broken through? How do you think the research and development results of the fiber will better connect with downstream enterprises?

Wang Xiaofeng: Teflon has successfully developed polysulfonamide fiber and has produced mass production. However, the development of subsequent products still needs to be followed up, such as the manufacturing technology of protective fabrics such as polysulfonamide, pure spinning and blended yarn, fabric, dyeing and finishing, and key technologies such as dyeing, finishing and other processes and formulations. It is applied to professional clothing, special protective clothing and supporting products in many industries, so as to form a series of new heat-resistant and flame retardant protective products to meet the needs of domestic dual-use.

As a fiber source enterprise, we hope to form a chain of protective products based on polysulfonamide fiber through the design and publicity of brand elements.

While forming an industrial chain with the upstream and downstream industries, we have formed cooperative alliances with many research institutes, such as Donghua University, Shanghai Univer, Shanghai Textile Academy, printing and dyeing Institute, and so on, and have carried out tight cooperation in personnel training, research and development, and product development.

Moderator: in the process of seeking differentiated development, what are the relevant R & D activities of the company at this stage?

Wang Xiaofeng: according to the characteristics of polysulfonamide fiber, which are rich in color and comfort, we are working with enterprises to develop household appliances, so that products can be used at home and play a role of fire prevention and rescue in case of danger.

The development of civilian products is also a differentiated field we have gradually explored. At present, the company has developed products such as student supplies, kitchen utensils, home appliances and so on. Each product has implanted safety concepts into daily necessities, and embodies the concept of home safety through various products.

Moderator: with the continuous enhancement of national security awareness, the scope of application of protective products is also expanding. How do you view the development direction of the flame retardant industry at present and in the future?

Wang Xiaofeng: the market demand of flame-retardant products is obvious. However, in the process of industrial development, China often has the disadvantages of rushing headlong into mass action, and the homogenization of products is serious. Then, vicious price competition occurs rapidly, resulting in the decline of corporate profits and the weakening of innovation.

In the future, the market of China's flame retardant protection market is very large, the market demand is different, and the products will also be varied. Enterprises should pay attention to innovation, develop products with different properties, and form differentiated product patterns to meet different needs.

At the same time, product standards in different fields should also be refined. We should not blindly cover foreign standards, but also blindly follow foreign standards. With the increasing abundance of China's flame retardant products, the performance and function are getting closer to the foreign level. In some areas, they even surpass the level of foreign products. Therefore, we should get more voice in the standards of flame retardant products. Otherwise, simply applying the foreign standards will often fall into the awkward situation of intellectual property rights in the production of such products, which will be unfavorable to the development of Chinese enterprises.