Measures to reduce fabric shrinkage

1. Minimize the tension during the refining process.

2. In the dyeing and finishing process, all the wet cloth drying is to apply the tension as much as possible, and reduce the elongation to avoid excessive narrowing of the width of the door. If the machine is open and evenly baked, a small capacity box should be installed after the opening. Then put it into the cloth rack to avoid excessive tension between the opening and the rolling water.

3, in the process of mercerizing to master the expansion tension, to maintain the width of the fabric to pay attention to control the latitudinal tension.

4, the flat washing machine guide bar for each process. Rolling rods and drying cylinders should be strengthened to ensure smooth and smooth maintenance. When the tension is relaxed, the guide rollers in the wrinkling tank should be freely operated. The line speeds of the front and rear rolls of the same machine should not be too large, and the warp tension should not be too much. The mopping is subject to the elastic adjustment of the landing gear or the segment drive adjustment device during the segmentation of the platform to control the tension.

5, mercerized products should be strictly controlled in the post-processing process tension because of mercerizing and then elongation of the warp shrinkage rate in the actual production operation can be set in each process in the semi-product width index in each machine In the measurement and assessment, the pre-order should be checked and accepted to ensure the width of the semi-finished product.

6. For some mechanical movement tensions, manual control of tension is required. Strict process operation, strengthen process operation, strengthen mechanical cleaning and reduce running tension to effectively reduce fabric shrinkage.

7. Strengthen the inspection of the mercerizing processing conditions. The qualified dyeing factory can use the straight roller and the cloth to combine the mercerizing.

8. Varieties with large shrinkage rate in the warp direction: such as khaki, the gabardine poplin fabric should be pre-shrinkage treatment. Reduce the shrinkage rate. In these tight varieties, only the mechanical relaxation tension is used, the best shrinkage rate is also Up to 4%, this shrinkage should be further reduced by pre-shrinking. After the product is pre-shrinked, the shrinkage rate is reduced, and the hand feel can be obtained, and the texture is clear and soft.

9. For varieties with large latitudinal shrinkage rate, some are unreasonable because of the unreasonable width of the grey fabric. Even with reasonable processing conditions, there is still a large latitudinal shrinkage rate. The processing conditions are poor, and the shrinkage rate is larger. Improvement measures, mercerized varieties to ensure that the width of the falling cloth meets the requirements. In addition, it is necessary to improve the specifications of the grey fabric, and to widen the width of the grey fabric without increasing the cost or increasing the cost, so as to ensure that the latitudinal shrinkage rate falls within the required range.

10. Resin finishing can reduce the shrinkage rate and increase the elasticity (note the hand feeling). The other coating can also reduce the shrinkage rate.

11. For the T/C synthetic fiber blended fabric, it is necessary to grasp the process and operation of the qualitative mercerizing process.

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