How to identify fiber

1, the identification method:

1 The methods of identification are touch, visual inspection, combustion, microscopy, dissolution, drug coloring, and infrared spectroscopy. In the actual identification, often need to use a variety of methods, comprehensive analysis and research after the results.

2 The general procedure for identification is as follows:

A. First identify the natural fibers and chemical fibers by the combustion method.

B. In the case of natural fibers, microscopic observations are used to identify various plant fibers and animal fibers. If it is a chemical fiber, the difference in melting point, specific gravity, refractive index, and dissolution performance of the combined fiber is distinguished one by one.

C. In the identification of mixed fibers and blended yarns, it is generally confirmed by microscopic observation that several kinds of fibers are contained therein, and then identified one by one by an appropriate method.

D. For dyed or finished fibers, dye stripping or other appropriate pretreatments are generally required before reliable identification can be guaranteed.

2, the common fiber combustion properties:

Fiber: Near flame phenomenon in the flame, after the flame, odor, ash, blemishes;

Cotton: The phenomenon of near flame burning, afterglow continued burning, burning paper, very little ash, soft, black, gray;

Hair: Melt away from the flame, melt and burn, it is difficult to continue burning, self-extinguishing, burning scent, brittle, brittle, fluffy, black;

Silk: melted away from the flame of silk sound, difficult to continue burning self-extinguishing, sizzling, fragile, crisp, fluffy, black;

Polyester: Near flame melts and drips, blisters, continues to burn, weak scent, hard round, black, light brown;

Acrylic: Melting near flame burning, melting and burning, rapid burning splash, weak scent, hard round, irregular or bead.

3 fiber calculation method

1 Fixed length system:

A. Turks: The weight of a 1000-meter-long yarn at a nominal moisture regain is called a special number.

Formula: TEX=(G/L)×1000

Where: G is the weight of the yarn (g) and L is the length of the yarn (m)

B. Denier: The weight of a 9,000-meter-long wire at a given moisture regain is called the denier.

Formula: NTEX=(G/L)×9000

Where: G is the weight of the wire (g) and L is the length of the wire (m)

A. Public Branch (public branch): The length of meters that a gram of yarn (silk) has.

Formula: NM(N)=L/G

In the formula: 1 is the length of the yarn (millimeter), and G is the weight of the yarn (g).

B. English (English): The number of 840-yard lengths that a 1-lb yarn has.

Formula: NE(S)=L/(G×840)

In the formula: L is the length (code) of the yarn (silk), and G is the weight (pound) of the yarn (silk).

4, common materials selected for bedding

1 Pure cotton yarn: 36TEX (16S), 28TEX (21S), 18×2TEX32S/2) 15TEX 40S), 14×2TEX (42S/2), 10×2TEX (60S/2)

2 Polyester and cotton yarns: 20TEX (30XS), 15TEX (40S), 13TEX (4/S)

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