Textile knowledge: How do fabrics appear weft?
Apparel manufacturers, due to the poor quality of fabrics, often affect the quality and delivery of garments. Both the corporate image and the customer's confidence will have a negative impact. For example, manufacturers of jeans wear often encounter weft in fabrics. If corresponding measures are not taken during the production of ready-to-wear garments, the size of garments is very unstable, especially when the clothes are washed and deformed. "Twisting" seriously affects the appearance of the garment and its performance. 1, the definition of the slope of the latitude The general twill weave fabric will produce weft due to improper handling of the production process and large internal stresses. The fabric is twisted, and the weft is divided into right and left wefts. It is commonly called "twisting" and "twisting". The degree of slack = (h/H) X 100%. The larger the weft, the greater the rate of change in weft after fabric washing. "Latitude slope" is also called "weft slope change rate". The greater the slope of the latitude, the more serious the weft of the fabric is. 2, the common slope of the test method 1. Square 50 cm x 50 cm from the edge of the cloth 2. Send to water, after washing, remember to use ironing iron, place it after 2-3 hours to measure the change 3.Measurement and calculation method, measure the difference of the diagonal line, the unit is mm, 100X2(long diagonal line - short diagonal line)/the sum of two diagonal lines = the percentage of weft slope The general rule of thumb must be less than 2%-3%. Otherwise, there will be twists or new legs in clothing. 3, weaving cloth test weft method In the vertical state of the cloth, first find a balance line as a reference, one end of which is aligned with that straight line, and then measure the height of the balance line higher/(lower) on the other side to increase/(lower) The height of the dividing line is divided by the width of the width of the door, which is the amount of weft. Remove one piece by hand, then align the cloth to fold it in half to see the difference of a few centimeters and divide by the width to get the percentage. This hard to say depends on the style. If there are stripes, it is more troublesome. Basically, there is no problem with 5% or more. When this size is exceeded, the right and left bones should be considered in a uniform direction to avoid twisting the tube. 4, the cause of the weft One reason: If the design of the fabric or the design of the knitted fabric is poor, a weft state will be formed. In this case, the design itself must be changed. Second reason: Although textiles were made based on normal textiles and designs, wefts were formed during the dyeing and printing processes. This kind of slack accident occurs in the dyeing and printing factories in the staple fabrics of short-fiber fabrics and filament fabrics. The reason is that weaves and washed fabrics tend to cause weft. Because the softer fabric is more easily deformed. Therefore, when rope dyeing and dyeing with a dyeing machine similar to this, the weft of the plain weave is particularly noticeable, and the weft and meandering (S-shaped) state of the fabric is easily formed. When the bending occurs to produce a defective product and the structure of the fabric is bent, textiles (impregnation, continuous dyeing, and printing) using the fabric will all become defective. Especially when finishing printing, the bending state is clear at a glance. The use of weft-inclined fabrics for printing finishing results in a "bending" accident. The printed pattern is curved to the fabric. Squeegee tapes for rotary screen or automatic flat screen printers tend to cause wefts if they are bonded to fabrics that are not fully wefted. 6, weft solution In order to solve this problem, the fabric is passed through a diagonal bar of the cloth in front of the regulator, and a tension difference is formed between the left and right sides of the cloth to correct it. In addition, there are also many factories that use the edge of the cloth to adjust the skewness of the cloth and place the regulator along the side of the snake. However, this method cannot completely eliminate weft. There are many similar factories. In the case of correcting the weft and meandering state of the cloth by a person's visual inspection and manual operation using a regulator, if there is an error in the visual inspection and the manual operation, the weft or the meandering of the cloth will occur instantaneously. The method to prevent the weft completely is to install the weft orthosis (the whole weft machine) in front of the regulator or in front of the printing machine. If the cloth is allowed to pass through this device, the weft can be eliminated. If we use sensors, microprocessors and specially designed guides, three interconnected suitable devices (wefting devices), it is possible to correct weft in an unattended manner. 4Color Blanket,Wax Fabric,Soft Sofa Cover,Soft Jacquard Blanket Wenzhou Gangxin textiles co.,Ltd , https://www.gxblanket.com
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