Textile fabric defect terminology
Crotch defect (Barre) For knitted fabrics, this defect is characterized by some uneven patterns that usually appear in the fabric rows or in the transverse direction of the fabric. Uneven spinning threads, uneven spinning thread tension, and spinning threads with different dye affinities may be the reasons for this. Bad Place is a very convenient term for fabric defects that are difficult to describe in words. This term is often used to describe those places where the fabric’s weave has been severely damaged. Bias (refer to weft bias). For woven fabrics, this defect refers to the dimensional deviation of the weft and warp yarns; for knitted fabrics, this refers to the fabric course and fabric Where dimensional skew occurs in wales. Birdseye Defect (Birdseye Defect) For knitted fabrics, this condition refers to the occasional and irregular tuck pattern that is opposite to the fabric design. Bow: For woven fabrics, this means that the weft yarns are located in an arc in the width direction of the fabric; for knitted fabrics, this means that the stitch courses are located in an arc. across the width of the fabric. Broken End This defect refers to the place where the warp yarn has been broken and repaired. Its common feature is that the broken ends can be seen woven into the fabric. Broken Col Pattern: For woven fabrics, this refers to the discontinuity of the pattern, which causes errors when drawing the color pattern with the loom thread or causes damage to the loom when the weft yarn breaks. Improper resetting of the image filling chain after repairs can cause this defect; in the case of knitted fabrics, this is caused by an incorrect shuttle change. Broken pick refers to the absence of weft yarns in part of the width of the fabric due to weft yarn breakage. Bruise (refer to temple defect) This condition refers to the fact that due to the wear and tear of the yarn being knitted or the fabric that has been knitted, the fibers lose their sense of direction and the appearance of the fabric is distorted. Burl mark: This is a deformation caused by an excess of certain substances, including slubs, waste, and loose yarn being removed with repair tools. Buttonhole selvage is a fabric selvage defect caused by excessive tension accumulated on the loom shuttle before the weft is replaced. This tension tends to restrict the selvedge weft from falling off and interlacing properly, creating an imperfection similar to a buttonhole. The defect of chafed yarn refers to the frayed spinning yarn. After the spinning yarn is frayed, the fiber will lose its sense of direction and the spinning yarn will be distorted. This defect affects the colorability of the yarn and often results in radial stripes or weft streaks. Chopped Filling This defect refers to an imbalance in the direction of the weft yarn, which is characterized by the presence of an obvious or neat pattern, and the pattern is caused by the eccentric behavior of the drawing roller. Clip mark refers to an area of fabric that has not been dyed. This defect is caused by small metal clips clamped to the edge of the fabric. These small clips are used to avoid or correct. The fabric selvage is folded over during coloring. Coarse End means that the diameter of one warp yarn is significantly larger than the diameter of the normal warp yarn of the fabric. Coarse Pick refers to the situation where the diameter of one weft yarn is significantly larger than the diameter of the normal weft yarn of the fabric. Coarse yarn defect refers to the situation where the diameter of one yarn is significantly larger than the diameter of the normal yarn of the fabric. Cockled fabric defects (Cockled Fabric) For knitted fabrics, this defect refers to those fabrics that are wrinkled, shrunken or bulged and do not lie flat on the cutting table. The reason for this phenomenon may be due to the irregular twisting of the spinning yarn, the uneven tension of the spinning yarn during the knitting process, or the reaction of the spinning yarn in the fabric during the finishing process. The degree is uneven. Cockled yarn refers to a condition where some fibers in a spun yarn appear to be curled and the direction of the fibers cannot be distinguished. The reason for this situation is that some spinning fibers are too long relative to the drawing roller, causing the fiber to be clamped by the following drawing roller before the previous drawing roller loosens the fiber. This will cause the fibers to break and curl. Twisted yarn looks like tiny twists in the fabric. Col Fly refers to the appearance of fiber impurities of different colors in spinning yarn or fabrics. Colored yarn misdraw (Col Misdraw) For woven fabrics, this situation refers to the fact that the colored yarn drawn by the loom thread is opposite to the color pattern and/or texture design; for warp knitted fabrics In terms of fabrics, this situation refers to the contrast between the colored yarn and the pattern design drawn by the guide rod. Col Out: During the printing process, if the color paste in the storage tank is almost used up, it will cause blank spots in the printing pattern. Col Smear is caused by the printing process.Among them are the pattern deformations caused by the application of paint. Hard crease defects (** Crease) For knitted fabrics, this defect refers to hard creases caused by the use of wrinkled fabrics during the shrinkage control and stabilization process. C rugation (refer to pre-shrunk hidden wrinkle defect) This defect is a washboard phenomenon caused by the thick pad of the pre-shrunk finishing machine that is not working properly. Cover is a term usually used to describe defects in the surface properties of fabrics, such as the number of warp and weft yarns, the prominence of patterns, and other defects that can be caused by changing one of the two spinning systems. to obtain the desired characteristics. Crease defect refers to the crease caused by the fabric folding itself under pressure. Crease Streak This defect refers to the visible after-effects caused by creases in the fabric during coloring or finishing work. Damaged refers to a condition where the fabric has been damaged and can no longer be used for the intended purpose. Doct Streak refers to a narrow strip of squeegee caused by a broken scraper during the printing process. , swinging striped flowers. Double End refers to the situation where two warp threads appear where the fabric design originally requires only one warp thread. Double pick refers to the occurrence of two weft yarns at the shed of the loom where the fabric design originally requires only one weft yarn. Doubling: For weft yarn, this situation means that the size of the weft yarn is twice larger than the normal size due to the two ends of the roving hitting one end of the spun yarn at the same time; for the warp yarn, due to the roving Two ends of the yarn hitting one end of the spun yarn at the same time will result in a thick warp. For warp knitted fabrics, dragging end refers to the fact that the warp yarns are entangled in the warp beam, causing the warp yarns to be knitted under unstable tension conditions. Drawback This defect is caused by excess tension caused by abnormal restrictions that are gradually applied to many warp yarns. When the restrictions are removed, these excessively loose warp yarns will gradually be woven into the fabric, causing fabric defects. Dropped pick is a fabric defect caused by the inability of the weft insertion device on shuttleless looms to clamp and release the weft in time. Since the weft insertion device cannot release the weft in time, the weft will enter the main body of the device, causing half of the weft missing in the width direction of the fabric. In addition, since the loosened weft yarn will be woven into the fabric immediately, in this case, the weft yarn woven into the fabric may sometimes become tangled. Dye Streak is a streak defect related to dye. Its occurrence mainly depends on the application of dye on the fabric or the absorption of dye by the fabric. End Out refers to the lack of warp yarns. Weft stripe defect (Filling b) refers to a visually obvious stripe in the width direction of the fabric. Differences in the physical or chemical properties of the weft yarn are the direct cause of this defect. Filling Floats (Refer to Weft Floats, Top Floats and Bottom Floats) means that the weft yarn does not intersect with the warp yarn where it should have intersected, but instead intersects with the warp yarn. It stretches freely above or below. Fine end defects refer to the fact that the diameter of one or some warp yarns is significantly smaller than the diameter of the normal warp yarns of the fabric. Fine yarn defects (Fine Yarn) For knitted fabrics, this defect refers to that the diameter of one or some yarns is significantly smaller than the diameter of the normal yarns of the fabric. This situation usually results in the fabric being damaged. Fine linear cracks appear in the courses or transverse direction of the fabric.
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