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2. Contents of Textile Appearance Inspection Although there are many provisions on the appearance quality inspection of textiles, the focus is mainly on several aspects: the inspection of raw material quality, the inspection of weaving quality, the inspection of pre-processing processes, and the quality of dyeing. test.
2.1 Inspection of raw material quality The quality of raw materials includes: uneven texture of the raw materials, obvious fat and thin fibers, large belly yarn, yarn knots and heterosexual fibers, poor network filaments, too many joints of raw materials, mixed The spinning mix is ​​not uniform, and the quality of the spunlace coated wire is unacceptable. Most of these problems are caused by the confirmation of the sample and the fact that the appearance quality inspection of the finished product is not placed in an important position during the confirmation of the sample. At the same time, the color of some raw materials also causes defects that are not conducive to identification and discovery. Therefore, the patience and meticulousness during the inspection process are Necessary, but also with the help of advanced equipment and equipment to improve the efficiency and perfection of inspection.
(2) There are many reasons for weaving problems caused by the inspection of weaving quality, including problems with the equipment itself, problems with weaving technology, quality of raw materials for fabrics, structure of fabrics, temperature and humidity in the weaving environment, and equipment operators. The technical level, errors and omissions in the weaving process. Take woven fabrics as an example, weft break, fault misalignment, weft reduction, weaving, stop marks, wefts, joints, fillet warp or weft yarns, weft density too dense or too thin, loose cloth, roll cloth Loose shafts, narrow machine widths, faulty structures, etc. are common defects in weaving. Some of these problems and flaws in weaving can be repaired, while others are not repairable. For repairing weaving problems that can be repaired, weaving problems that cannot be repaired, we can use hanging lines to make the code, open shearing and other methods to reduce the impact of weaving on the fabric. For some serious and more obvious weaving we must take Open shear processing.
(3) Examination of pre-treatment processes In the pre-treatment process, the problems with different types of fabrics are also mostly different. For example, for cotton or polyester-cotton bleached fabrics, whether the whiteness is acceptable or not is the focus of the test; for polyester-tanning fabrics, whether or not the strength after alkali-reducing processing is the focus of inspection; The question of whether or not it will produce strong damage is the focus of inspection in the processing of polyester-cotton products, polished cotton fabrics and lyocell fabrics. In some cases, the problems in the pretreatment process are difficult to find during processing and inspection. For example, if the weight loss fabric of polyester reduction fabric is not clean after reduction, some yellow spots will be produced on the surface of the fabric after dyeing; if the desizing of cotton fabric is not clean, the surface of the fabric after dyeing will produce some “plasma marksâ€. If the fabric is not scouring, it will leave some cottonseed hull on the surface of the fabric. These problems are often difficult to find. If inspectors lack relevant experience, they may be considered as dyeing defects or other problems, and they are not dealt with in a timely manner.
(4) Examination of the dyeing quality During the visual inspection of textiles, the problems of dyeing are relatively easy to identify. Color points, stains, and color tracks are common dyeing defects. They must be marked in a timely manner during the inspection process and properly handled in accordance with the inspection standards. During the dyeing process, sometimes the cylinders or the broken ends of the fabrics are caused by some reasons. In particular, the blocking of the cylinders may cause visible marks on the surface of the fabrics, which are difficult to repair and recover. There are many reasons for this type of problem, sometimes due to the special raw materials of the textiles, due to problems in the water temperature in the dyeing process, excessively cold water in the cooling, or excessive dehydration in the dehydration process. As an inspector, special attention should be paid to such issues. If similar problems are found, they should be marked and reported in a timely manner. The characteristics of the problems should be summarized and the causes of the problems should be analyzed. The repair and handling should be decided according to the severity of the problem.
The Non-stick chips basket allows perfect heat
circulation around chips, compared with traditional way, you don't need
to fry it in oil, it's clean and healthy cooking! There's a side
reinforcement sealing type, it's more easy to take it by hand, and
protect the food from any mesh drops.
The General Characteristics is:
1. Rules and Standards for Appearance Inspection According to the provisions in the Catalogue of National Standards of the People's Republic of China, the content of textile appearance inspection includes more than 20 kinds of fibers, yarns, fabrics, and finished garments, among which, the inspection content of textile products is mainly Including: the maturity of cotton fiber, the fineness of fiber, and the identification and inspection method of fiber morphological characteristics; the test content of yarn mainly includes: grading of yarn defect, measurement and identification of yarn hairiness, and experimentation on natural cotton yarn Test methods: Test methods for cotton yarns, chemical fiber pure yarns and blended yarns; Test items for fabrics include: evaluation of fabric wrinkle rating, test of fabric drape performance, inspection of fabric pilling degree, and woven fabric structure analysis Methods: Determination of color and chromatic aberration of woven fabrics, determination of length, width and density of woven fabrics, determination of gloss of woven fabrics, experimental method of fabric hooking, determination of moisture resistance of fabrics, and method for testing natural cotton fabrics, dyeing of cotton fabrics Classification; The test content of the finished garment mainly includes: whether the appearance of the garment surface is Defects, measured changes in the appearance and size grading of the joint surface of the garment, the hot-melt adhesive dry after lining, knitted cotton underwear and assessment of surface defects acrylic predetermined knitted underwear and the like.