Selection, use and maintenance of padding machines – general requirements for selecting open-width padding machines
(1) The rolling residue rate is not required to be too low, but while meeting the required rolling residue ratio, a uniform rolling effect must be obtained.
(2) The diameter of the liquid rolling roller should not be too small to avoid increasing deflection and causing uneven liquid rolling.
(3) The surface hardness of the rubber liquid rolling roller should not be too high, and the contact width of the two roller rolling points should be larger. However, it should be noted that if the surface hardness of the two mangle rollers is low, light and thin fabrics will often produce ripples when being rolled. In addition, when the overrun rate increases, color spots will appear in the thick knots of the spinning yarn on the surface of the fabric.
(4) The difference in surface hardness of the two quenching rollers that make up the quenching roller group should not be too large to avoid causing the fabric color to become hairy on both sides.
(5) A certain immersion time must be maintained. Generally, two immersions and two rollings are required to achieve uniform padding.
In addition, equipment must be selected based on the structural characteristics and fiber properties of the fabric. Usually, for thick and dense fabrics, you can choose a rubber mangle roller open-width padding machine with high roller surface hardness, small pressure contact surface width of the two-roller nipping point, and large total pressure; while for thinner fabrics, jacquard fabrics and knitted fabrics, material, the surface hardness of the rubber roller cannot be too high. Since synthetic fibers absorb less liquid, the moisture in the wet fabric mainly remains between the fibers, warp and weft yarns and on the surface of the fabric. Therefore, it is advisable to use a rubber roller with a lower surface hardness (some as low as Shore HA60). The elastic roller surface of the rubber roller is used to squeeze out the moisture between the warp and weft yarns of the synthetic fiber fabric.
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