With the development of the textile industry, special functional finishing is increasingly recognized by people. Water- and oil-repellent finishing has developed more and more rapidly in recent years. Organofluorine resin is a water- and oil-repellent finishing agent with excellent performance. It is widely used in clothing, high-end interior decorations, shoes and socks, bed sheets, luggage, etc. due to its high effectiveness, resistance to deterioration, and ease of use. Textile products. However, many printing and dyeing manufacturers often encounter some problems when using organic fluorine water- and oil-repellent finishing agents, such as poor initial waterproof performance, poor durability, occurrence of waterproof stains and streaks, large changes in color and light, etc. In response to the above problems, through many experiments and practices, we found the causes of the problems and put forward the main countermeasures to solve the problems.
Poor initial waterproof performance
1. Reason:
Through experiments, it is believed that there are only three main reasons for poor initial waterproof performance:
⑴ Processed cloth: Insufficient cleaning of scouring or dyeing cloth, leaving scouring agent, leveling agent, dispersant, penetrating agent and other additives remaining on the cloth.
⑵Problems with the working fluid, improper use of concentration or changes in concentration during processing; or, the stability of the working fluid is affected by mechanical stirring, temperature, mixing chemicals, etc. Another reason is that the working fluid preparation sequence is inappropriate and the pH value of the bath fluid is incorrect.
⑶ Due to processing conditions, improper selection, or insufficient and uneven drying and baking conditions. The main countermeasures to solve the above problems can start from the following aspects.
2. Main countermeasures
⑴. Before waterproof processing, the processing cloth should be fully washed.
⑵ Choose one suitable for processing fibers, and replenish newly prepared working fluid as much as possible during processing. Strengthen the temperature management of processed cloth, and the drying temperature does not exceed130℃, avoid previous submissions Union. Avoid putting the hot cloth directly into the studio after drying. Understand the compatibility of the waterproofing agent and prepare the working fluid correctly according to the preparation sequence. The prepared working fluid must be used within 24 hours.
⑶ The drying and baking temperatures should be uniform, and the baking temperature should not be too low. Generally, 150℃Above.
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