Measures to Reduce Fabric Shrinkage Composite Fabric Information

1. Reduce the tension as much as possible during the refining and bleaching process. 2. During the dyeing and finishing process, when drying wet cloth, try to loosen the tension as much as possible to reduce the elongation and avoid excessive narrowing of the door width. If it is an open-width continuous drying machine, a small fabric holding box must be installed after the width is opened. Then thread it into the fabric frame to avoid excessive tension between the opening and water rolling. 3. During the mercerizing process, the expansion tension must be mastered, the width of the gray fabric must be maintained, and the weft tension must be controlled. 4. Flat washing machine guide rollers for each process. Rolling rollers and drying cylinders should be repaired to ensure they are smooth and smooth. To avoid wrinkling when the tension is relaxed, the guide rollers in the water tank must operate freely. The linear speed difference between the front and rear rollers and drying cylinders of the same machine should not be too large. The meridional tension should be controlled so that the cloth does not drag the floor. During the segmentation process of the long platform, the There is a tension adjustment opening and lowering device or a segmented transmission adjustment device to control the tension. 5. The tension of the products after mercerization should be strictly controlled during subsequent processing. Because the warp shrinkage rate after mercerization is stretched again, in actual production operations, the semi-finished product width index can be formulated in each process and the cloth removal of each machine can be determined. During the assessment based on measurement, the subsequent process must be inspected to ensure the width of the semi-finished product. 6. For some mechanical movements, manual tension control is required. Strict process operations, strengthen process operations, and strengthen mechanical cleaning to reduce operating tension can effectively reduce the shrinkage of fabrics. 7. Strengthen the inspection of mercerizing process conditions, if possible Dyeing factories can use straight rollers and cloth clips combined with mercerization. 8. Varieties with large warp shrinkage: such as khaki and gabardine poplin fabrics need to be preshrunk to reduce shrinkage. In tight processing of these varieties, only rely on machinery If the tension is relaxed, the best shrinkage rate is as high as about 4%. This shrinkage rate should be further reduced by pre-shrinking. After the product is pre-shrunk, not only the shrinkage rate is reduced, but also a better feel can be obtained. , The texture is clear and the luster is soft. 9. For varieties with large weft shrinkage, some due to the unreasonable width of the gray fabric, even if the processing conditions are reasonable, there will still be a large weft shrinkage. Shrinkage with poor processing conditions Larger, further improvement measures must be taken. The mercerized varieties must ensure that the width of the dropped cloth meets the requirements. In addition, it is necessary to improve the specifications of the gray cloth and widen the width of the gray cloth without increasing the cost or increasing the cost. , to ensure that the weft shrinkage falls within the required range. 10. Resin finishing can reduce shrinkage and improve elasticity (pay attention to the feel). Coating can also reduce shrinkage. 11. For T/C synthetic fiber blended fabrics, it is necessary to grasp the qualitative mercerization process and operation to better control the shrinkage rate.
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