It is a textile made of natural protein fibers spun from silkworm cocoons. When the cocoon is ready to emerge, people put it into boiling water and spin silk in time. [Edit this paragraph] Silk features first and comfort. Silk is made of protein fiber, which has excellent biocompatibility with human body and smooth surface, and its friction stimulation coefficient to human body is the lowest among all fibers, only 7.4%. Therefore, when our delicate skin meets smooth and delicate silk, it protects every inch of our skin with its unique soft texture and according to the curve of the human body.
Second, it absorbs and releases water well. Silk protein fiber is rich in amino (-CHNH), amino (-NH2) and other hydrophilic groups, and because of its porosity, water molecules are easy to diffuse, so it can absorb or release water in the air and maintain a certain amount of water. At normal temperature, it can help the skin retain a certain amount of moisture and will not make the skin too dry; When worn in summer, it can quickly release sweat and heat discharged by the human body, making people feel extremely cool. It is precisely because of this characteristic that silk fabrics are more suitable for direct contact with human skin. Therefore, people regard silk clothing as one of the necessary clothing in summer.
Silk not only has good heat dissipation performance, but also has good warmth retention. Its thermal insulation performance is proud of its porous fiber structure. There are many tiny fibers in a silk fiber, and these tiny fibers are composed of even smaller fibers. So the seemingly solid silk is actually more than 38% hollow, and there is a lot of air in these gaps, which prevents the heat from emitting and makes the silk have good warmth retention.
Third, sound absorption, dust absorption and heat resistance. Silk fabric has high porosity, so it has good sound absorption and air absorption performance. Besides making clothes, it can also be used for interior decoration, such as silk carpets, tapestries, curtains, wall cloths and so on. Decorating a room with silk decorations can not only make the room spotless, but also keep the room quiet. Because silk has the properties of moisture absorption, moisture release, moisture retention, air inhalation and porosity, it can also adjust indoor temperature and humidity and absorb harmful gases, dust and microorganisms. In addition, silk fiber has little thermal denaturation and is relatively heat-resistant. When heated to 100℃, the brittleness is only about 5~8%, and the thermal variability of most synthetic fibers is 4~5 times greater 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 ~ 2600℃, which is flammable and fusible. Therefore, using silk fiber as the raw material of interior decoration can not only play the role of sound absorption, dust absorption, heat preservation, but also play the role of flame retardant.
Fourth, prevent ultraviolet rays. Tryptophan and tyrosine in silk protein can absorb ultraviolet rays, so silk has good anti-ultraviolet function. Moreover, ultraviolet rays do great harm to human skin. Of course, after absorbing ultraviolet rays, silk itself will undergo chemical changes, which will make silk fabrics easily yellow under the irradiation of sunlight.
Fifth, rubbing the glass rod can make the glass rod positively charged. [Edit this paragraph] Silk classification Fifteen categories of silk:
According to the fabric structure, warp and weft combination, processing technology and the types of silk that show the shape of silk surface, it is divided into 14 categories. Among them, except yarn, yarn and velvet, flowers and ground organization are not considered, and the category of anchor is mainly ground organization. Each kind of silk surface can have a plain color (scouring, bleaching and dyeing) or a flower (weaving and printing).
(1). Spinning: plain weave, original weaving or semi-color weaving process. Generally, the warp and weft are not twisted or weakly twisted, the silk surface is relatively flat, and the spun products are light and strong.
(2) Crepe: a fabric with obvious crepe effect and elasticity made of plain weave or other weave or warp and weft interwoven.
(3) Satin fabric: a smooth and bright satin fabric.
(4) Twill: A fabric with obvious twill texture on the silk surface by using or changing the twill weave.
(5) Yarn: a fabric woven entirely or partially from yarn, and every other weft yarn is twisted by warp yarns A and B..
(6) Rory: A fabric that uses Rory weave in whole or in part is made by twisting A and B warp yarns every other odd weft yarn or more, which is called Rory.
(7). Velvet: A fabric made entirely of velveteen with velvet or terry on the surface.
(8) Brocade: A kind of yarn-dyed jacquard fabric with exquisite and colorful patterns and satin and twill weave.
Tencel: a light porous fabric made of plain weave or yarn winding weave.
(10). Woven fabrics with various tissues and thick warp and weft lines are rich in texture and furry.
(1 1). Ge: a kind of fabric with plain weave, twill weave and its changing weave, with thin warp and thick weft, thick texture and transverse woven pattern on the silk surface.
(12). Black: plain weave fabric, with long filaments as warp yarns and cotton or other yarns as weft yarns, with thick texture.
(13). Silk: A fine, flat and crisp fabric used for plain knitting.
(14). Silk: plain weave or fabric with different weaves, with closely interwoven warp and weft.
(15). Carving: A special silk fabric made of plain weave or other weave through warping and weft breaking.