Heat setting process for wrinkle resistance of polyester knitted fabric

The wrinkle resistance of polyester knitted fabric and heat setting treatment are complex and delicate processes that require strict control of process parameters to ensure the quality of the final product. By optimizing the heat setting process, the wrinkle resistance of polyester knitted fabrics can be improved, meeting consumers' demand for high-quality textiles.
Heat setting process
Preparation stage: Pre treat polyester knitted fabric, such as cleaning, drying, etc., to remove impurities and moisture on the surface of the fabric. Subsequently, appropriate heat setting process parameters are set based on the material and performance requirements of the fabric, including temperature, tension, time, etc.
Heating stage: The fabric is fed into a heat setting machine and heated by a heating device. The heating temperature is usually set above the glass transition temperature of polyester fibers, but below their melting point, to ensure that the fiber molecular chains can undergo a certain degree of relaxation and rearrangement while maintaining morphological stability.
Tension control: Apply appropriate tension to the fabric during the heating process. The magnitude of tension should be adjusted according to factors such as fabric thickness and elasticity to ensure that the fabric can maintain a flat and wrinkle free state after heat setting. Excessive tension may cause the fabric to stretch excessively, affecting dimensional stability; If the tension is too low, it may not effectively eliminate the internal stress of the fabric and reduce the anti wrinkle effect.
Cooling and shaping: When the fabric reaches the set heating temperature and is maintained for a certain period of time, it is quickly sent to the cooling zone for cooling. The cooling process should be rapid and uniform to avoid deformation or the generation of new internal stresses in the fabric during the cooling process. After cooling, the fiber molecular chains in the fabric will be fixed in a new form, thereby achieving an improvement in wrinkle resistance.