Related parameters: tube diameter of 762 mm (30 “); machine No. 18 needle /25.4 mm, large ones for 90 F of the single machine; raw material for 16.7 tex (150 D) Polyester; g mass of 125 g / m2.
Generally knitted in the knitting fabric formed into a cylindrical shape, after winding device becomes flat. The two ends of the fabric is folded back. Coil in the fold of the fabric is different from the normal form of the coil, the coil is seriously distorted, the degree of distortion depends on the fabric density, thickness, machine number, yarn and other factors. Problem described in 18-pin /25.4 mm 16.7 tex-sided woven polyester, raw material and machine No. partial small compared to the formation of thin fabric, fold the coil more serious degree of distortion. When the fabric is opened tile, added to the fold of the external force disappears, the coil in the role of the internal stress of the yarn can be restored to its normal state. However, when the fabric is not open, and long term storage, or under pressure in a fabric fold, and when the fabric encounters high temperatures, the stress distortion of the coil within the yarn to be released, such that the coil can not be recovered to normal, the fabric surface due to the distortion of the coil formation of dead scar , it is often said that crease. This process is equivalent to the fabric setting process, once formed crease, relying on the normal dyeing means hardly removed.
The key to solving this problem is to be twisted in a coil of yarn is not released before the stress caused by the elimination of external fabric folding deformation upcoming fabric folded open, flat. Specifically, the fundamental solution is to use the machine and rolling open width knitting machine (commonly known as Bigfoot machine), in the case of ordinary models off the machine in the bolts of cloth, the soon to open the piece, and then parked flat pieces to be dyed and rolling . As for mercy stacked cloth roll cloth does not fundamentally solve the crease fundamentally, its role is to relax the tension of the fabric does not change the fabric folded state. When the fabric parked too long, will crease and fold the fabric in the relaxed state after the cloth produced in long-term storage will form creases, to form a “chicken footprint” by the dyeing and finishing. Currently the plant is also a popular approach is to first before dyeing of wool fabric predetermined shape, but this is a remedy that can remove part of a slight crease to crease has formed the powerless.
Further, the gap between the pulling roll is relatively small, even if the pulling roll is adjusted to the widest gap, the pressure between the pulling roll or large rubber, after a local rubber roller, the direction of the cloth by the downward force , but not come into contact with the rubber roller where (on both sides of the fabric in each of the empty rubber roller 1.5 cm) is not subject to friction, the force is the upward direction of the fabric, the fabric due to the different direction of the force, together with the long vertical stacking machine , resulting in the grain direction of the cloth dyed different setting, resulting in diffuse reflection, so that as seen from the different longitudinal positions of the colors are not the same implicit.
To solve this problem, first the release of the pulling roll, the two rubber rollers sandwiched between hard objects on a sufficiently thick so that the cloth is not clamped to the pulling roll, there is a sufficient gap by direct use of the cloth roll winding, so that the force is uniform fabric timely after unwinding the lower cloth, can solve the problem.
