Real silk generally refers to silk, including mulberry […]
Real silk generally refers to silk, including mulberry silk, tussah silk, castor silk, cassava silk and so on. Real silk is called the "fiber queen" and has been favored by people throughout the ages for its unique charm. Silk is a protein fiber, and silk fibroin contains 18 kinds of amino acids that are beneficial to the human body.
Silk fiber is the only natural filament fiber that has been put into practical use. It is made from the coagulation of silkworm slime. Textile fabric manufacturers have introduced that silk fibers are divided into many types due to the different feeding habits of silkworms. Among them are mulberry silk fibers formed by eating mulberry leaves, tussah silk fibers formed by eating tussah leaves, and those formed by eating cassava leaves, mulberry leaves, and castor leaves. Other wild silk fibers. Mulberry silk fiber and tussah silk fiber can retain the shape of filament fiber in the filament yarn formed by bundles, and other wild silk fibers can only be transformed into short fibers for textile processing. Among the filament yarns formed by bundles of mulberry silk fibers and tussah silk fibers, the filament yarns of mulberry silk fibers are the most important, accounting for most of the natural filament yarns.
Silk fibroin, also called silk fibroin fiber, is the silk fiber that is finally used. Sericin wraps around the silk fibroin, and its presence will have an important impact on the use, processing and product style of the fiber.
(1) It can be used as a protective agent to protect the silk fibroin fiber from mechanical damage in textile processing.
(2) It can be used as a bundling agent for bundling processing of silk filament yarn, namely (sao) reeling.
(3) It can be used as a shape memory agent to lock the deformation applied to the silk fibroin and release it when needed.
The content of sericin on each cocoon silk is not uniform. The silk that is spit out has 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.
Silk is a protein fiber, which is a kind of nitrogen-containing polymer compound. The single base of its macromolecule is alpha amino acid. The structural formula of α amino acid is RCH(NH)2COOH, and because its amino group is located on the α carbon atom next to hydroxy acid, it is called α amino acid. According to the general structural formula of silk fibroin molecules, the side groups connected to different peptide groups in the entire macromolecular chain are different, which is an important feature of natural protein fibers. There are 18 kinds of amino acids that make up silk fibroin.