Yarn-dyed fabric series

How to distinguish between pure wool and acrylic thread?

There are two simple techniques for distinguishing pure wool and acrylic thread:

1. Look at the surface. The color of pure wool is gentle, and it feels elastic, soft and fluffy; acrylic wool is dazzling, soft to the touch, and there is a rustling sound when touched.

2. Burn with fire. Take a section of plush and burn it with fire. The pure wool emits blue-gray smoke, which emits a stench of burning hair, resulting in a glowing and intangible black ball, which is broken into powder with a flick of the hand; when the acrylic wool burns, it is first melted and then burned. It has a bright light and a sour smell, resulting in black balls, which are not easy to crush.

How to identify the label of the wool thread?

The label of the wool line is mostly composed of three digits. The first number shows the applied material:

"1" reveals domestic wool;

"2" reveals imported wool;

"3" exposed inlet wool and viscose blend;

"4" reveals new products;

"5" reveals domestic wool and viscose blends;

"6" exposed inlet wool and acrylic blend;

"7" reveals domestic wool and acrylic blend;

"8" reveals pure acrylic. The second and third digits represent the number of single yarns of wool. The larger the number, the thinner the yarn.

For example, 826 knitted fleece is a fine fleece of 26 yarns spun from pure acrylic fiber; 790 is a thick fleece of 9 yarns blended with wool and nitrile; if a "4" is added before the triple digit, the analysis is a new product.

How to identify synthetic fibers by incineration?

(1) Polyester: When burning, the fiber first shrinks, melts, and then burns. The flame is yellow-white, very bright, and smokeless. The fire problem, after burning, has a fragrant smell, and the ashes are black and hard, which can be crushed with fingers.

(2) Acrylic fiber: After burning, it can be extended, but it is slower. It is burned and melted, accompanied by a sour taste. After burning, the ashes are black balls and can be crushed.

(3) Vinylon: When incinerating, the fiber shrinks first, and at the same time, combustion and melting are generated, but it does not prolong combustion and emits black smoke. After combustion, black small pieces are left, which can be crushed.

(4) Polyvinyl chloride: The flame is bright when incinerated, shrinks and smokes, has a special smell, and is left with brown ashes.

(5) Polypropylene fiber: dull shrinkage during incineration, no flame, waxy odor, waxy lump after burning;

(6) Nylon: There is no flame when incinerated; it has a celery smell, and it is incinerated and curled into a white gel, which can be pulled into silk while it is hot. When cold, it becomes a solid light brown hard ball, which is not easy to crush.