Raw silk A grade silk yarn

The natural fiber contained in silk is mainly silk fiber, which is a continuous long fiber that is coagulated by the secretion of silk when the cocoon is formed. It is also called natural silk. It is one of the earliest animal fibers used by humans, including mulberry silk and tussah silk. , Castor bean silk, cassava silk, etc. The content of sericin on each cocoon silk is not uniform. The silk that is spit out has a low sericin content, and the silk that is spit out at the end has the highest sericin content. Silk fiber has a relatively complete fibril structure, which can fully express the excellent quality of natural fiber.
The characteristic of silk is comfortable to wear. Real silk is composed of protein fibers, which has good biocompatibility with the human body. In addition to its smooth surface, its frictional stimulation coefficient to the human body is the lowest among all kinds of fibers, only 7.4%. Good moisture absorption and desorption. Silk protein fiber is rich in many hydrophilic groups such as amine groups  and because of its porosity, it is easy for water molecules to diffuse, so it can absorb or emit water in the air, and Keep a certain amount of moisture. Under normal temperature, it can help the skin retain a certain amount of moisture without making the skin too dry; worn in summer, it can quickly dissipate the sweat and heat discharged by the human body, making people feel extremely cool.

Silk not only has better heat dissipation performance, but also good warmth retention. Its thermal insulation benefits from the porous fiber structure. There are many very fine fibers in silk fibers, and these fine fibers are composed of even finer fibers. It can also absorb sound, dust, and flame retardant. Silk fabric has a high porosity, so it has good sound absorption and air absorption, so in addition to making clothing, it can also be used for interior decoration. Because silk has moisture absorption, moisture release properties, moisture retention, air absorption and porosity, it can also adjust indoor temperature and humidity, and can absorb harmful gases, dust, and microorganisms. In addition, real silk fibers have low thermal denaturation and are relatively heat-resistant. When heated to 100°C, they are only about 5-8% brittle, while most synthetic fibers have a thermal deflection that is 4-5 times larger than that of silk. The burning temperature of silk is 300-400℃, which is a flame-retardant fiber, while the burning temperature of synthetic fiber is 200-260℃, which is flammable and easy to melt. Therefore, the use of silk fiber as a raw material for interior decoration can not only play a role in sound absorption, dust absorption, and heat preservation, but also play a flame retardant function.