Three identification methods of fiber flame retardant cloth

Classification:
flame retardant fabric

1. Visual inspection method of hand feeling

The visual inspection method of hand feeling is to touch with hands, observe with eyes, and judge the type of fiber based on experience. Flame-retardant clothThis method is simple and does not require any equipment, but it requires the appraiser to have extensive experience. When identifying fabrics and clothing fabrics, in addition to touching and observing the fabric, you can also remove the yarn from the edge of the fabric for identification.

1. Feel and strength: Cotton and linen feel harder, while wool is very soft. Silk, viscose fiber, and nylon have a moderate feel. When pulled off by hand, silk, linen, cotton, and synthetic fibers are felt to be strong; wool, viscose fiber, and acetate fiber are weak.

2. Elongation: When stretching the fibers, the elongation of cotton and linen is small; the elongation of wool and acetate fibers is longer; the elongation of silk, viscose fiber, and most synthetic fibers is moderate.
3. Length and uniformity: The length of natural fiber has poor uniformity, while the length of chemical fiber and flame-retardant cloth have better uniformity. Cotton fibers are thin, soft and short in length. Wool is long and curly, soft and elastic. Silk is long, slender and has a special luster. The fiber vertebrae are gelatinous and hard.

4. Weight: Cotton, linen, and viscose fibers are heavier than silk; nylon, acrylic, and polypropylene are lighter than silk; wool, polyester, vinylon, acetate fiber, and silk are similar in weight.
2. Combustion method
Combustion characteristics of commonly used textile fibers
Fiber Phenomenon near flame In flame After leaving flame Smell Ember-shaped flame retardant cloth
Cotton ignites immediately near a flame, burns quickly, and has an afterglow smell of burning paper. Very few, soft, black or gray
Hair melts away from the flame, melts and burns, is difficult to continue burning, will self-extinguish, smells like burning feathers, is brittle, brittle, and black
Silk melts away from the flame, makes a wispy sound when burning, is difficult to continue burning, will self-extinguish, splashes when burning, smells like burning feathers, is brittle, brittle, and black
Hemp ignites immediately when near a flame, makes a popping sound when burning, smokes and has an afterglow when it continues to burn, similar to cotton flame retardant cloth
Viscose ignites immediately near a flame, burns, and continues to burn very quickly without afterglow, burning paper and chemical smell. There is no ash except for dull ones, with a small amount of black ash in between.
Nylon melts and shrinks when near flame, melts and burns, drips and bubbles, does not directly continue to burn, smells like celery, hard, round, light, brown to gray, bead-shaped
Polyester melts and shrinks when near the flame, melts and burns, and can continue to burn, with a few smoke. Very weak sweetness, hard round, black or light brown
Acrylic melts, burns when near flame, melts and burns, burns quickly, splashes, weakly spicy, hard black, irregular or bead-shaped
3. Microscope observation method
By using a microscope to observe the longitudinal and cross-sectional shapes of fibers, or by using dyeing and other methods, natural fibers and chemical fibers can be distinguished more accurately.
Longitudinal and cross-sectional morphological characteristics of commonly used fibers:
Fiber Longitudinal Morphological Characteristics Cross-sectional Morphological Characteristics
Cotton, flat ribbon, with natural twist, round waist, with middle cavity, flame retardant fabric
Wool has scales on the surface, round or nearly round, and some have marrow.
Mulberry silk straight irregular triangle
Ramie, horizontal knots, vertical lines, kidney shape, with middle cavity and cracks
Viscose fiber has longitudinal grooves and hook teeth to form a multi-page edge
Polyester, nylon smooth round shape
Acrylic fiber is smooth or has one or two flame-retardant cloth grooves and is nearly round

Disclaimer:

Disclaimer: Some of the texts, pictures, audios, and videos of some articles published on this site are from the Internet and do not represent the views of this site. The copyrights belong to the original authors. If you find that the information reproduced on this website infringes upon your rights, please contact us and we will change or delete it as soon as possible.