With the gradual improvement of the demand for functional fiber, the research on flame retardant staple fiber is deeper, so what is the development status of flame retardant staple fiber?

1, flame retardant polyester fiber

Flame-retardant polyesters were industrialized as early as the 1980s. In the mid-1990s, phosphorus-based flame retardant monomers developed by Celanese were successfully used in traditional textiles. DuPont, Hearst, Dongyangfang and other companies use organic and inorganic flame retardants and compound flame retardant systems to achieve flame retardant polyester fiber industrialization by copolymerization and blending. Dongli Fiber Research Institute (China) Co., Ltd. has obtained cationic dyeable flame retardant polyester fiber by copolymerization and blending. The flame retardant polyester obtained by the BASF company in Germany by copolymerization can be used to produce fibers. Ital Match Chemicals of Italy, DSM of the Netherlands and ADEKA of Japan all have patent reports on flame retardant polyester fibers.

In recent years, China's flame retardant polyester fiber has developed rapidly. Sichuan University, Qingdao University, Beijing Institute of Clothing Technology and Donghua University have research reports or authorized patents for flame retardant polyester fiber. For example, Jiangsu Shenghong Group, Shanghai Petrochemical, Yizheng Petrochemical, Shanghai Defulun's flame retardant polyester filament or short fiber have achieved large-scale production, and achieved export earnings, including the flame retardant polyester industrial yarn produced by Shanghai Petrochemical. The strength reaches 6.0 cN/dtex. However, the performance of the flame retardant polyester fiber against melt dripping and smoke suppression still needs to be further improved.

2, flame retardant polyamide fiber

Research on flame retardant polyamides is mostly concentrated in the field of resins, and is mainly based on blending flame retardant. BASF, Rhodia, DSM and other companies are representative of flame retardant plastic products. However, flame retardant polyamide fibers are difficult to prepare, and only EMS of Switzerland has announced the development of copolymerized flame retardant polyamide fibers, but there are no commercially available products.

China's research on copolymerized flame retardant polyamide fiber is mainly concentrated in universities and research institutes, and has not yet been industrialized. Donghua University and Guangdong Xinhui Meida Co., Ltd. have jointly developed flame-retardant polyamide 6 fiber, but the long-lasting water-resistant resistance is limited. Shenma's B890UN grade and a few other flame retardant polyamide products from other companies are added to phosphorus or other halogen-free flame retardants by mechanical blending, and their flame retardant properties can reach UL94 V-0. Shanghai Anjiao Plastics Additives Co., Ltd. also reported on sheath-core flame retardant polyamide 6 fiber. The bio-based polyamide 56 fiber developed by Shanghai Kaisai Biotechnology Co., Ltd. has intrinsic flame retardant properties, a limiting oxygen index of more than 32, and a fiber strength of ≥ 4.5 cN/dtex, which is widely used in the field of flame retardant clothing and decoration.

3. Flame retardant regenerated cellulose fiber

The research of foreign flame retardant cellulose fiber and its products is ahead of the domestic market and has already achieved industrialization. Companies such as Lenzing in Austria, Kemira in Finland, and Asahi Kasei in Japan have realized the industrialization of flame retardant regenerated cellulose fibers by blending methods. The fibers have been widely used in protective clothing, knitted fabrics and home textiles.

Domestic Qingdao University, Tianjin Polytechnic University and Hengtian Hailong Co., Ltd. have independently developed silicon-based, phosphorus-based and phosphorus-nitrogen flame retardants to prepare flame retardant viscose fiber with good performance; Tangshan Sanyou Group Chemical Fiber Co., Ltd., Jilin Chemical Fiber Co., Ltd. developed a phosphorus-based flame retardant viscose fiber using a phosphorus-based flame retardant; Beijing Sauerland Flame Retardant Fiber Co., Ltd. developed a new generation of environmentally friendly silicon-nitrogen flame retardant viscose fiber. However, the strength and flame retardant durability of the flame retardant viscose fiber have yet to be further improved.

4, flame retardant vinylon

Currently, only Vinyl has industrialized production in China, Japan and North Korea, but neither Japan nor North Korea has flame retardant vinylon products.

China's flame-retardant vinylon was developed by Sichuan University in the 1980s in cooperation with Sichuan Vinylon Factory. At the beginning of this century, the former General Military Reserve began to organize Sichuan University and Sichuan to develop high-strength vinylon. On this basis, the Military Reserve continued to organize Sichuan University. And Shanghai Quanyu Biotechnology Co., Ltd. independently developed a high-efficiency halogen-free, low-smoke, non-toxic flame retardant that integrates acid source, carbon source and gas source, and developed a complete set of process technology for flame retardant vinylon production. It has a limiting oxygen index of 29, a fiber strength of ≥ 7.5 cN/dtex, and a dyeable high-strength flame-retardant vinylon. Flame-retardant vinylon and other flame-retardant fiber blended fabrics have been used in the Armed Police Snow Leopard Commando, Falcon Commando, Armed Police Air Combat Brigade, Armed Police Rescue Force, Rocket Army Battle Suit, and PLA Peacekeeping Force.

The above is the development of four major types of flame retardant staple fibers.