Polyamide and polyacrylonitrile fibers and their blended fabrics, and some polyester textured yarn fabrics mostly use a wet heat setting process, and the temperature of the wet heat setting is lower than that of the dry heat setting process.

Water bath setting method

Treat the fabric in boiling water at 110°C for 0.5-2 hours. This method is simple and easy, but the setting effect is poor, and the fabric still has a large thermal shrinkage after setting.

High pressure steam setting method

The setting is carried out in an autoclave, and the fabric is treated with high-pressure saturated steam at 110-135°C for 20-30 minutes to obtain a good setting effect. This method requires special pressure-resistant equipment, and production cannot be carried out continuously.

Superheated steam setting method

The fabric is treated with superheated steam under normal pressure, and the temperature can reach about 130°C. This method can shorten the heat treatment time, increase the production efficiency, improve the brightness of the color, prevent the fibers from yellowing, and improve the feel, style and elasticity of the fabric.