The loose edges of satin fabrics refer to the phenomenon of loose edges on both sides when weaving polyester FDY (especially large glossy yarn) satin fabrics on a water-jet loom. In severe cases, the opening cannot be opened properly. Qing, weft insertion is difficult and affects the efficiency of the loom. Some factories use the method of covering the spindle roller with a cloth layer, but in the long run, it will cause damage to the winding rollers, bearings, bearing seats, etc. Therefore, we should adopt active and effective methods to eliminate this defect.
(1) How did Songbian come about? There are several reasons.
① Improper selection of edge organization and number of reeds. There are too many intertwining points in the edge tissue. Although the edge will not loosen, the intersection of the satin texture warp and the edge tissue at the side end of the nozzle is prone to wide warp phenomenon. Therefore, many manufacturers prefer to choose a side weave with fewer interweaving points. However, due to the difference in weaving shrinkage between the two side weaves, loose edges will occur after a certain length of fabric is woven. Improper selection of the number of edge teeth can also cause loose edges.
②The acanthose on both sides of each acanthus roller in the winding part is worn.
Since the width of the weaving shaft gradually narrows to the width of the cloth shaft during the operation of the loom, the tension on both sides of the cloth is greater than that of the middle part, and the wear on the echinoderm is relatively large. Over time, both sides The degree of wear of the acanthus at the lower part is greater than that at the middle part, causing the gray cloth on both sides to relax.
③The warp itself has a tendency to relax on both sides of the weaving beam. During the preparation process of the weaving beam, it goes from the warping creel to the warping beam, from the warping beam to the pulp beam, and then from the pulp beam to the weaving beam. , the amplitude of the warp sheet is always changing, so the degree of repeated stretching of the warp yarns on both sides is higher than that of the middle part, and its tendency to retract is weaker than that of the middle part, so it retreats on the loom. Relaxation is more likely to occur during solution.
④The process parameters of the loom are improperly adjusted, and the water jet collides with the side warp during weft insertion, causing the water-sprayed side warp to relax.
(2) The following measures can be taken to solve the problem of loose edges.
① Reasonably select the edge weave and the number of edge tooth penetrations. It is recommended to use a variable weight flat weave. The number of weft cycles should be determined after repeated tests on the loom, which can generally reach 20~40. It is also possible to increase the number of side reed penetrations without adding additional side weave, but this product is often not popular with customers.
② Regularly check the condition of the acanthosis roller. If any wear (especially wear on both sides) or degumming is found, it must be replaced or repaired in time.
③ In each process of preparing the weaving beam, try to ensure the consistency of the edge yarn tension and the warp yarn tension in the middle, reduce the difference in warp sheet width, and ease various edge yarn folding angles. For example, a yarn board is added between the warping creel and the fixed-width reed. During the sizing process, the yarn sheets are evenly divided in the first fixed-width reed, thereby easing the stretching of the warp yarns as much as possible.
④ Reasonable adjustment of the loom process to avoid water jets from impacting the side warp. In addition, the total tension of the warp wires should not be too large. Appropriately reducing the height of the back beam can also alleviate the loose edge situation.
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