Factors affecting the weft shrinkage of textile fabrics
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Textile fabric shrinkage weft yarn weaving plain weave twill satin weave
1. Fabric structure: In the basic structure, the more interweaving points of weft yarns and warp yarns, the greater the weaving shrinkage of the weft yarns. Other conditions Under the same circumstances, the order of weft shrinkage is: plain weave > twill weave > satin weave.
2. Density and warp density
①The higher the warp density, The more frequently the weft yarns are interlaced, the higher the weft shrinkage rate.
②The greater the warp yarn density, the greater the buckling wave height when the weft yarns are interlaced, and the greater the weft yarn shrinkage.
3. Tension: The tension on the machine during manufacturing is high, the warp straightness is high, the weft yarn buckling wave is high, and the weft yarn shrinkage is large.
4. Temperature and humidity in the workshop: The higher the temperature and humidity, the easier it is for the weft yarn to shrink, and the greater the weft shrinkage rate.
5. Conditions: After the fabric is inspected and stored in the finishing workshop for a period of time, due to the release of warp tension, the weft yarns elongate and the weft yarns shrink. The rate calculation formula shows that the weft shrinkage rate of the weft yarn is smaller than that of the weft yarn when the loom is on, and the cloth surface becomes wider by 0.5%~1.2% (polyester/cotton varieties are lower, pure cotton varieties are higher), that is, the weft yarn shrinkage rate after the loom is smaller than that of the weft yarn on the loom Weaving shrinkage.
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