First, the visual method of hand feeling
The visual method of hand touch is to touch the hand, observe the eye, and judge the type of fiber by experience. This method is simple and does not require any instruments, but requires a lot of experience from the discriminator. When fabricating fabric&tracelog=pd_info_promo" target="_blank">clothing fabrics, in addition to touching and observing the fabric, the yarn can be removed from the edge of the fabric for identification.
1, feel and strength: cotton, hemp feel harder, wool is very soft. Silk, viscose and nylon are moderate in feel. When broken by hand, silk, hemp, cotton, and synthetic fibers are strong; hair, viscose, and acetate fibers are weak.
2. Elongation: When stretching the fiber, the elongation of cotton and hemp is small; the elongation of wool and acetate fiber is longer; the elongation of silk, viscose fiber and most synthetic fiber is moderate.
3, length and uniformity: "natural fiber length, poor uniformity, chemical fiber length, uniformity. Cotton fiber is slender and soft, the length is very short. Wool is long and curly, soft and elastic. Silk is Long and slender, and with a special luster. The hemp fiber is gelatinous and hard.
4, weight: cotton, hemp, viscose fiber is heavier than silk; nylon, acrylic, polypropylene is lighter than silk; wool, polyester, vinylon, acetate fiber and silk weight are similar.
Second, the combustion method
Common textile fiber burning characteristics
The phenomenon of the near-flame of the fiber smells the ash shape after leaving the flame in the flame
The near-flame of the cotton is burning and burning faster, and there is little aftertaste, soft, black or gray.
The hair melts away from the flame, melts and burns hard to continue burning, will self-extinguish, burn feathery, brittle, brittle, black
The silk melts away from the flame, it has a sound when burning, it is difficult to continue burning, it will self-extinguish, and it will splash, burn feathery, fragile, brittle, black
Ma Jinyan is burning, burning when there is a popping sound, continuous burning smoke, afterglow, with cotton
Adhesive near-flame, burning, burning, continuous burning, no afterglow, burning paper, chemical inclusions, no ash, no ash, a small amount of black ash
Nylon near flame is melted, melted, dripped and foamed, not directly burned like celery, hard, round, light, brown to gray, beaded
Polyester near-flame is melted, melted, and can be burned continuously. A few of the sweet, hard, round, black or light brown
Acrylic melt, near flame is burning and burning and burning, splashing weak and spicy hard black, irregular or beaded
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