Jing Chai Haze Survey Spawned New Trends In Textile Chemicals

Fluorocarbon has low surface energy, good water repellent, antifouling and oil repellent properties, especially polymers containing 8 fluorocarbon atoms (C8) side chains. It has the characteristics of high chemical stability, heat resistance, durability and good washing resistance. It is especially suitable for waterproofing treatment of textiles. C8 fluorine compounds have been used in textiles for a long time as waterproofing finishing agents. After decades of improvement, the quality and performance of fluorinated compounds have been perfected.

The excellent hydrophobicity of C8 fluorine compounds originates from the chemical structure, and there are two main technologies for generating fluorinated functionality: electrochemical fluorination (electrolysis) and polymerization process (polymerization). The production of perfluorooctane sulfonyl compounds (PFOS) by electrolysis will produce trace amounts of perfluorooctanoic acid (PFOA), and trace amounts in C8 water repellent. PFOS is one of the most difficult organic pollutants to be known. PFOA is suspected to have a similar hazard to PFOS. Countries in the world are constantly strengthening the supervision of PFOS and PFOA, and C8 fluorine compound functional finishing agents will eventually withdraw from the market.

Short chain fluorocarbons contain 6 shorter fluoroalkyl side chains (C6) of fluorocarbon atoms. The main ingredient of C6 waterproofing agent is PFHS (perfluorohexane sulfonyl compound or sulfonate), which is an ideal substitute for C8 waterproofing agent. Short chain fluorocarbons have been recognized as acceptable alternatives by EPA, the Canadian environment and health department, and are environmentally sound when required. At present, it has entered the stage of commercial use and is gradually accepted by downstream.

The water repellent effect of C6 waterproofing agent is quite different from that of C8 waterproofing agent, and the cost is much higher than that of C8 waterproofing agent. Only for general purpose, short chain fluorocarbons can provide good finishing effect. There are many kinds of finishing agents on the market.

Archroma (ang Gao)'s new generation of fluorocarbon Nuva? N series can significantly enhance the waterproof and anti fouling properties of fabrics, and has good compatibility. Nuva? N1811 is widely applicable. Cost performance High; Nuva? N2155 is a high-end waterproof and oil resistant product, suitable for color sensitive fabrics. Huntsman Textile Effects (Huntsman textile dyeing) introduced PHOBOL CP-DP and PHOBOL CP-DL to combine oil repellent and water repellent functions with decontamination functions. The water repellent Furex-616E, Furex-308E and Furex-1688B of de Mei chemical industry do not contain PFOA and PFOS, and are waterproof and washable. Furex-616E is mainly used for cotton, polyester cotton fabric environmental protection "three defense" finishing; Furex-308E is mainly used for chemical fiber and other fabrics. Waterproof finishing Furex-1688B is mainly used for common waterproof finishing of cotton and other fabrics.

Dendrimers and organosilicon are free of fluorine and can be used as alternative solutions for C8 waterproofing agents. Dendrimer has good wear resistance. After finishing with special dendrimers, the finishing agent is evenly distributed, even if the surface is rubbed, it has a certain waterproof property. Silicone not only has waterproof function, but also gives fabric excellent softness.

Purtex? WR is an environmentally-friendly polyurethane water repellent produced by Freudenberg (Ke Debao), which can endow fabrics with durable water repellent effect, excellent washing and abrasion resistance, and soft and comfortable handle. Under the condition that the water hardness is 9.1 degrees dH and the water temperature is 20 degrees Celsius, the test results of the rain in the bunis Gate show that the water absorption rate of the fabric decreases from 90% to 25% before finishing. The polyurethane finishing agent can form a bond between polyester fibers or fiber bundles, thus having a positive effect on the wear resistance. Martin and Dyer tests confirmed that the wear resistance of the fabric can be increased by 3-4 times after finishing with Purtex WR.

Hunsman Textile dyeing The PHOBOTEX is a series of advanced fluorine free water based polymer products, which can significantly improve the waterproof and antifouling properties of textiles, and at the same time give the fabrics moisture absorption and quick drying functions and comfortable handle. It can be applied to all kinds of textiles flexibly. Tanatex Chemical (Tuo Na chemical) introduced the new technology of 3D ecological fluorine free waterproofing finishing, which combined with 3D molecular technology to ensure that the treated fabric can maintain excellent water resistance even under extreme conditions. Among them, Baygard? WRS is suitable for synthetic fibers; Baygard? WRC is suitable for cotton fiber and cotton and synthetic fiber blended fabrics. The TranWR 5910A of Chuan Hua chemical industry does not contain PFOA and PFOS. It has the advantages of environmental protection, washability, softness and waterproofing. The drying temperature is above 100 C and has excellent waterproof effect and washability can reach 30 times.

The fluoride free waterproofing agent DM-3616 of de Mei Chemical Co., which contains no fluorine, PFOA and other banned substances and special regulatory substances, is used for polyester, cotton, nylon and other woven fabrics with excellent waterproof performance. Angang's Arkophob? FFR fluorine free waterproof products combine fluorine free chemical and durable waterproofing, and make the fabric soft. 3. the development prospect of new waterproof finishing agent is higher than that of C8 fluorine proofing agent. Short chain fluorocarbon or fluorine free waterproofing agent has been improved in terms of human and environmental friendliness, but there are still some deficiencies in water resistance and other technical indicators. Besides, washing resistance, bleaching resistance and other indicators need to be improved. From the perspective of market acceptance, the price of the new waterproof agent is much higher than that of the traditional C8 fluorine finishing agent. However, under the influence of relevant policies and regulations and certification standards of the United States and the European Union, with the high concern of ZDHC and other brand organizations and consumers, it is almost certain that the outdoor garment industry will eventually promote the popularization and application of eco-friendly finishing agents in the printing and dyeing industry.