How to identify rayon, silk, polyester yarn

Rayon is bright and shiny, the feel is slightly rough and hard, and there is a feeling of dampness and coldness, squeeze it tightly with your hands and let go, there are more wrinkles, there are still marks after flattening, take out the silk and knead it with the tip of the tongue, the rayon is straight and easy to break and break. The elasticity is not the same when wet and dry. Silk has a soft luster, soft feel, and delicate texture, and can produce a special sound when rubbed with each other, commonly known as “silk sound” or “silk sound”. After holding it with your hands, there are few wrinkles and not obvious, and the silk elasticity of silk products is the same. Polyester silk is highly reflective, stiff, fast and crisp, has good wrinkle resistance, is strong and not easy to break.
Silk: Silk generally refers to silk, including mulberry silk, oak silk, castor silk, cassava silk, etc., and consumers can use the following methods to identify silk fabrics.
1. Product number identification method: Domestic silk satin implements a unified product number composed of 5 Arabic numerals, these 5 digits from the left The first digit represents the material number of the fabric, all silk fabrics (including mulberry silk and silk) “1”, chemical fiber fabrics are “2”, blended fabrics are “3”, oak silk fabrics are “4”, and rayon fabrics are “5”.
2. Price identification method: The price of silk fabric is about twice that of chemical fiber and simulated silk satin.
3. Luster and feel identification method: spread the sample flat to look at its appearance, silk has the ability to absorb light, looks smooth and not mirrored, the luster is elegant and soft, pearl shine, the feel is soft and elegant, the silk thread is dense, there will be wrinkles by hand, the higher the purity, the greater the density of silk, the better the feel; Although the imitation silk fabric has been dehardened and feels soft, the silk surface is dark and has no pearl luster; Chemical fiber fabrics have a bright luster and dazzling, and they feel stiff.
In addition, silk products should have a slight scratching feeling, rubbing the two layers of fabric, which will produce a “silk sound”, while other raw fabrics do not.
4. Burning method: Pull out part of the yarn and burn, the silk cannot see the open flame, there is a smell of burning hair, and the silk ash is black particles, which can be crushed by hand; The simulated silk has a plastic smell when it catches fire, and after the fire is extinguished, a hard glue block will be left on the edge.
If it is a fabric, the fabric should be soaked in clean water for more than 5 hours before production, so that the fabric can be completely absorbed and dried, and then soaked for the second time, so that the silk will not be deformed after two soaks and two drying, and the clothes can be washed at will. However, if you choose a high-end silk color, it is best to dry clean it, so that the fabric does not need to be soaked beforehand.
The characteristics of polyester silk are that it can resist chemicals and frequent washing, reducing the phenomenon of fading and decolorization of clothes. Therefore, hotel uniforms, stone blue denim clothing, sportswear or children’s clothing are made of polyester yarn.
Relatively speaking, polyester yarn is tougher than rayon. When embroidery, the machine runs at high speed, and the polyester thread with high toughness can withstand large tensile forces, and its fire resistance is extremely high, even if the clothes are close to the flame, it is not easy to catch fire.
Rayon is bright and shiny, the feel is slightly rough and hard, and there is a feeling of wet and cold, squeeze it tightly with your hands and let go, there are more wrinkles, there are still patterns after flattening, take out the silk and rub it with the tip of the tongue, rayon is straight and easy to break and break. The elasticity is not the same when wet and dry.