Silk not only has good heat dissipation performance, but also has good thermal insulation. Its thermal insulation is derived from its porous fibrous structure. There are many very fine fibers in a silk fiber, and these fine fibers are composed of finer fibers. Therefore, more than 38% of the seemingly solid silks are hollow, and there is a large amount of air in these gaps, which prevents the heat from being emitted and makes the silk very warm. So what are the characteristics of silk?
First, the sense of comfort. Silk is composed of protein fiber, which has excellent biocompatibility with the human body. In addition, the surface has a smooth surface, and its friction coefficient to the human body is the lowest among all types of fibers, only 7.4%. Therefore, when our delicate skin and smooth and delicate silk enamel, it with its unique soft texture, according to the curve of the human body, considerate and safely care for every inch of our skin.
Second, the absorption and desorption are good. Silk protein fiber is rich in hydrophilic groups such as amine groups (-CHNH) and amino groups (-NH2), and because of its porosity, it is easy to diffuse water molecules, so it can absorb water or emit moisture in the air. Keep a certain amount of moisture. Under normal temperature, it can help the skin to retain a certain amount of moisture, not to make the skin too dry; in the summer, it can also quickly release the sweat and heat from the body, making people feel cool. It is precisely because of this property that silk fabrics are more suitable for direct contact with human skin. Therefore, people regard silk clothing as one of the must-have summer clothes, third, sound absorption, vacuuming, and heat resistance. Silk fabrics have a high void ratio and thus have good sound absorption and air permeability, so in addition to making garments, they can also be used for interior decoration, such as silk carpets, tapestries, curtains, wall coverings, and the like. Arranging rooms with silk decorations not only makes the house dirty, but also keeps the room quiet. Because silk has moisture absorption, moisture release performance, moisture retention, air permeability and porosity, it can also adjust indoor temperature and humidity, and can absorb harmful gases, dust and microorganisms. In addition, the thermal denaturation of the silk fiber is small and relatively heat resistant. When it is heated to 100 ° C, it is only about 5 to 8% embrittled, and most synthetic fibers are 4 to 5 times larger than the silk. The burning temperature of silk is 300~400 °C, which is a kind of flame retardant fiber, while the burning temperature of synthetic fiber is 200~2600C, which is flammable and fusible. Therefore, the use of silk fiber as a raw material for interior decoration can not only play the role of sound absorption, vacuuming, heat preservation, but also function as a flame retardant.
Fourth, anti-UV. The tryptophan and tyrosine in silk protein can absorb ultraviolet rays, so silk has a good anti-ultraviolet function. Ultraviolet rays are very harmful to human skin. Of course, after absorbing ultraviolet rays, the silk itself undergoes chemical changes, so that the silk fabric is easily yellowed under the illumination of sunlight.
Silk not only has good heat dissipation performance, but also has good thermal insulation. Its thermal insulation is derived from its porous fibrous structure. There are many very fine fibers in a silk fiber, and these fine fibers are composed of finer fibers. Therefore, more than 38% of the seemingly solid silks are hollow, and there is a large amount of air in these gaps, which prevents the heat from being emitted and makes the silk very warm.
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