Inspection of foreign trade textile appearance quality-Iota

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News > Dynamic industry > Inspection of foreign trade textile appearance quality

Inspection of foreign trade textile appearance quality

Textile appearance quality inspection is the beginning of the accuracy of the color. The inspection process is as follows: colour inspection of accuracy; inspection weaving defects, material defects, defect, dyeing defects and finishing defects, in accordance with the standard requirements to determine whether suspension grading, cut demotion or spell horse. When the color accuracy test is more controversial, it can be resolved by the measurement of the electronic color measurement and color matching system..
1 of the raw material defects
Raw materials of unevenness, obvious big belly yarn, Pang Shousi, joint too, yarn knot, the fibers of the opposite sex, bad network silk, spandex covering yarn quality doesn't pass, blended yarn uneven mixing and so on, are likely to cause fabric demotion. The appearance quality of various raw materials of textile products on the problems belong to material defects. To achieve the purpose of lifting the inspection by the inspection staff, we must make the necessary repair for the inspection personnel. Because of the bad quality of raw materials caused by the textile product quality greatly degrade phenomenon have occurred, mainly because the horse samples to confirm and cylinder like that didn't finished appearance quality inspection is placed in an important position, and at the same time, some color is not easy to find the quality problems of raw materials. In the process of repairing repairing method must be reliable, are not allowed in the process of repairing damage to the surface of the fabric, produce new unable to repair the defect, which may seriously affect the appearance quality of the textile. Sometimes a defect before was not found, all inspection personnel is easy to overlook such defects. When customers on the ship to find this defect and puts forward the mending opinions, it is possible to all products of this order has been completed the inspection and packaging process, rework caused by on-site inspection of the confusion is imagined, the blow of all inspection personnel working enthusiasm far than caused by rework to their physical blow. Dyeing and finishing merchandiser at this time need to stand up and patience to do ideological work of all inspection personnel, in the premise of ensuring product delivery time guarantee both quality and quantity to complete the repair work. At the same time as possible to protect the packaging box from damage.
2 weaving defects
No matter what kind of weaving equipment, will produce weaving defects. Reasons for weaving defects in many aspects, the technical level of equipment, raw materials, environmental temperature and humidity, the operator, fabric structure and so on will cause weaving defects. With weaving fabric, for example, broken warp or weft broke, shrinkage of weft shrinkage of weft, stop mark, weft, a joint, a wrong the wrong weft, molding warp or weft dislocation, weft secret is too tight or too thin, loose selvage, a cloth rolling shaft loosening, machine width is too narrow, organization structure of the error and so on, all belong to the common defects in weaving. Some of these various weaving defects can be repaired, some are unable to repair. For those unable to repair the weaving defects can take the code, let wire cut open several pieces and other methods to improve the product grade. For the serious defects must be cut open a greater length of treatment.
3 pretreatment defect
Different varieties, characteristics of processing defects are not the same. For cotton or cotton bleached fabric, whiteness is qualified is very important. For polyester heavy twist fabric, the strength of alkali reduction is very important.. And for burnt out processing of polyester products, biological enzyme polishing processing sueding cotton fabric and Lyocell fabrics, the strength damage problem is still an important problem. Sometimes pretreatment process, the defects in the current process cannot be found for example polyester fabric deweighting reduction after the water is not clean dyeing fabric surface will produce macular. The cotton fabric is not clean will produce the "pulp trace" after the dyed fabric surface, the scouring and the net will be in the fabric surface residue cottonseed shell, etc.. For lack of experience of the inspection workers may put them all these defects as dyeing defect. But, on the contrary, both defect in pretreatment and dyeing defects, inspectors found that these defects should make proper treatment, which for the appearance of the product quality inspection is the most important.
4 dyeing defect
For textile inspection, found that the dyeing defect is relatively simple. Dyeing defect on the surface of the fabric has a different background color and irregular shape etc.. Color, color spots, trace is the most common dyeing defect. Found these defects and make a clearly marked, in accordance with the inspection standards of appropriate treatment is basic requirements for testing dyeing defects. In the dyeing process is likely to be due to various reasons causing woven material blocking cylinder or decapitation, especially blocking cylinder will cause great harm to the textile, on the surface of the fabric produced such as "chicken paw prints" or Xiaoshan called "Yu Cha pollution" of the defects. Such defects are difficult to repair. Sometimes some varieties of wool like because of the special raw material and in dyeing cooling stage because of cold water joined soon on the surface of the fabric produced a large number of similar "chicken paw prints" defects. This kind of wool products in the dehydration dehydration if the fabric too much or too long, will also have the defects on the surface of the fabric. Pay special attention on the surface of the fabric "fine flower" caused by the defect need inspection. Find such defects should be timely and textile merchandiser report, by the merchandiser to such defect inspection is determined according to the severity of the defect.
5 finishing defects
Because of the diversity of finishing, finishing defects is also showing diversity. For appearance finishing of textiles, sueding finishing, napping, biological enzyme polishing finishing is relatively common processing methods. The length, density and evenness of the villi are the main of the above three kinds of quality.

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