The knitted fabric is crocheted by the coils. After the yarn is subjected to pre-treatment, dyeing, water washing and the like, the coil is radially stretched and the shrinkage dimension is shortened. If it is directly finished with a loose dryer, although part of the deformation is restored, some internal stress remains in the interior of the fabric. When the knitted fabric is wetted again, the length of the fibers and the yarn is shortened due to the relaxation inside, and the fabric is shrunk.
The pre-shrinking machine has unique requirements and has become an energy-saving and environment-friendly finishing equipment. It solves the old-fashioned blanket fixing process and is difficult to achieve the effective purpose of pre-shrinking. It can only be used as a stereotype processing; and it is treated with a damped pre-shrinking machine. The softness and fullness are difficult to meet the requirements of high-end underwear, etc., thereby improving the dimensional stability of the knitted fabric, the flatness of the cloth surface, and the residual shrinkage rate is low.
The pre-shrinking zone of the pre-shrinking machine has two pre-shrinking drums, and the fabric is tightly squeezed and wrapped between the felt blanket and the heating drum through the expansion and contraction deformation of the blanket, and the fabric is squeezed and dried while the fabric is dried. Good thickness and longitudinal dimensional stability are obtained, thereby achieving a flat surface, a stable door width, a soft hand feeling, and a small shrinkage rate.http://www.haida-textile.com/