How to identify rayon, silk, polyester yarn?

The rayon is bright, the hand feels slightly rough, and it has the feeling of dampness and coldness. It is released by hand and wrinkles, and there are more wrinkles. After the flattening, there are still marks, and the cloth is pulled out with the tongue end, and the rayon is straight. Broken and broken. The elasticity is different when wet and dry. The silk is soft and soft, soft and soft, with delicate texture and mutual ambiguity. It can make a special sound, commonly known as "silk" or "绢鸣". It is released by hand and has less wrinkles and is not obvious. The silk of silk is wet and dry. The elasticity is the same. Polyester silk has strong reflective property, high rigidity, quick rebound, crispness, good anti-wrinkle performance, strong and not easy to break.
Silk: Silk generally refers to silk, including mulberry silk, tussah silk, ramie silk, cassava silk, etc. Consumers can use the following methods to identify silk fabrics.
I. Item number identification method: The domestic satin implements a unified product number consisting of 5 Arabic numerals. The 5 digits from the left indicate the material number of the fabric, and the whole silk fabric (including mulberry silk and silk). 1" chemical fiber fabric is "2", blended fabric is "3", tussah fabric is "4", and rayon fabric is "5".
Second, the price identification method: the price of silk fabric is about twice that of chemical fiber and simulated silk satin.
Third, the gloss, feel recognition method: the sample is evenly distributed to its appearance, the silk has the performance of light absorption, it looks smooth and does not have a mirror surface, the gloss is elegant and soft, the pearl is bright, the hand feels soft and elegant, the silk thread is dense, the hand will catch Wrinkles, the higher the purity, the higher the density of the silk feels better; the silk fabric has been softened, but the silk surface is dark and has no pearl luster; the chemical fiber fabric is bright, glare, and feels stiff. . In addition, the silk product should have a slight feeling of scratching the hand. Rubbing the two layers of fabric will produce a "silk" sound, while the fabric of other raw materials does not.
Fourth, the combustion method: some parts of the yarn are burned, the silk can't see the open flame, the smell of burning hair, the silk ash is black particles, can be crushed by hand; the artificial silk is fired, the plastic smell, the flame is extinguished Will leave a hard rubber block. The silk shrinkage rate is higher. It is better to purchase the finished product to choose a larger size than the actual demand. If it is a fabric, the fabric should be immersed in clear water for more than 5 hours before the production, so that the fabric completely absorbs moisture and then dried. Soak the second time, so that the silk will not be deformed after two dipping and drying, and the clothes can be washed at will. However, if you choose the high-grade goods in the silk, it is best to take the dry cleaning, so that the fabric does not need to be soaked beforehand.
The characteristics of polyester silk are resistant to chemicals and frequent washing, reducing the discoloration and discoloration of clothing. Therefore, hotel uniforms, stone blue denim, sportswear or children's clothing are made of polyester yarn.
Relatively speaking, polyester yarn is tougher than rayon. When embroidering, the machine runs at high speed, and the polyester yarn with high toughness can withstand a large pulling force; and its fire resistance is extremely high, even if the clothes are close to the flame, it is not easy to touch the fire.
The rayon is bright, the hand feels slightly rough, and it has the feeling of dampness and coldness. It is released by hand and then released. The wrinkles are more. After the flattening, there are still marks. The cloth is pulled out with the tongue and the rayon is straight. Broken and broken. The elasticity is different when wet and dry.

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