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Formed bamboo fiber products are divided into intrinsic quality and appearance quality
The intrinsic quality includes weight deviation, breaking strength, pH value, formaldehyde content, water absorption, color fastness, hair removal rate, fiber content deviation and the like. Appearance quality includes specification dimensional deviation, defects, sewing quality and ironing quality. Quality products or qualified products shall be marked by specifications, mainly consisting of 9 aspects, namely product name, implementation standard, factory name, grade, fiber content, type specification, washing mark, safety category and certificate. For safety categories, it is divided into A (baby), B (direct contact with skin), and C (not directly contact with skin).
Taking towel products as an example, according to the use and shape of the fabric, towel fabrics are generally divided into towels (face towels), pillow covers, bath towels, sweat towels, napkins, towels, terry cloth, home clothes and other decorative items, etc. class. The quality of the towel is mainly identified from three aspects: physical indicators, weaving defects, and appearance defects. In addition to physical indicators that need to be measured by the instrument, the weaving defects and appearance defects are collectively referred to as surface defects, which can be determined by external inspection.
a, weaving defects
It mainly includes menstruation, broken weft, dew-transmitting (ie, no raising) pulling, thinning, terry, flat cloth (the opposite side of single-face towel), raw edges, curling, tooth edge and seam jumping needle, etc. . The above problems can usually be identified by looking at the sun or by tiling.
b, the appearance of defects
Mainly including discoloration, color mixing, rust stains, stains, oil stains, wood printing skew and mold lake unclear. This is a problem of printing and dyeing, which can be identified by eyesight.
c, fragile defective products
This is due to improper bleaching and color development, oxidized cellulose or hydrolyzed cellulose, causing the fabric to be brittle. A serious hand is broken. In general, fabrics are grayish white or gray, and all have such problems. Two yarns can be drawn from the fabric. If the yarn breakage is crisp, the quality is good; there is no crisp sound, indicating that there is something wrong. You can also pull a piece of yarn and then pull out one piece of bamboo fiber. The bamboo fiber of high quality product is small and bright. The length of the fiber is about 3cm. When burning with fire, it burns well, the ash is gray or light gray; The silk of the product is slightly thicker, brighter but slightly dim. The length of the fiber is generally only about 1.5cm, the burning is not sufficient, and the ash is grayish gray or grayish black.
Qualified products and quality products
Qualified products and quality products look soft and full of color; soft and comfortable to touch, silky texture; smell no bad smell or slight faint bamboo fragrance. A towel with good water absorption, which can be quickly absorbed by water droplets, and a towel with poor water absorption, water droplets will form water droplets, and the penetration is slow. A towel with good color fastness, when washed with warm water of 30 degrees Celsius, the light-colored towel does not fade, and the dark product has a slight floating color for the first time, without obvious fading. Inferior products are clearly different: luster is dull or extraordinarily bright, hair that is like hay-like hair is not angry, touch is slightly rough, dry or very soft (most of these are prominent features of "wood or human cotton products"), when Have a light or heavy bad smell. Another towel with poor color fastness has a large amount of floating color falling off in the water. (æ£è…¾å®¶çºº)
Fabric
Shaoxing Concord Textile Co., Ltd. , https://www.ctknit.com