Classification And Technology Of Silk

Silk

Since ancient times, silk has been " Silk queen "Reputation". In modern times, people also give it the reputation of "healthy fiber" and "health care fiber". Therefore, the health care function of silk fiber can not be compared to any fiber, and can not be replaced. Silk fiber contains 18 kinds of amino acids essential for human body, which is almost the same as the amino acid contained in human skin, so it also has the reputation of human "second skin". Wearing silk clothing can not only prevent ultraviolet radiation, prevent harmful gases from invading, resist harmful bacteria, but also enhance the vitality of skin cells, promote the metabolism of skin cells, and have a good auxiliary therapeutic effect on some skin diseases. In addition, because of the special hygroscopicity and permeability, it also regulates body temperature and regulates moisture.

Two. Viscose Rayon (viscose filament)

The general name of regenerated cellulose fibers made from viscose is the main artificial silk and the main raw material of human silk. Production process: using wood, cotton lint and other cellulose as raw material to make paper pulp, soaking in sodium hydroxide solution at 18-25 degrees centigrade and 18% concentration for 1-2 hours, then press 2.6-2.8 times of pulp quality to form alkali cellulose. After grinding, aging, processing and carbonization, the cellulose yellow ester was formed, and then dissolved in sodium hydroxide solution to become viscose. After ripening, defoaming and filtering, the viscose is pressed into the coagulation bath consisting of sulphuric acid, sodium sulphate and a small amount of zinc sulfate through the pores of the spinneret, and then solidified, regenerated and stretched into silk. Then it is rolled into silk cake, washed, desulphurized, bathing, white, oiled and dried to become viscose rayon.

Three, copper ammonia rayon (copper wire)

Using the fine wood pulp and cotton lint pulp as raw materials, the spinning solution was dissolved in the copper ammonia solution of copper complex salt solution consisting of four copper hydroxide and mixed with filtered and defoaming. Taking water as coagulation bath, the water method is formed in "funnel spinning". Then the cellulose is completely regenerated through acid bath, then washed, oiled and dried to make copper ammonia rayon.

Four, acetate rayon (vinegar filament)

Cellulose is used as raw material. The refined cotton lint pulp of high purity cellulose is used as raw material. In the presence of catalyst, acetic acid is used to react with the acetic acid. The hydrogen atom of the hydroxyl group is substituted by acetyl group to form three cellulose acetate. The acetic acid reaction can be carried out under heterogeneous conditions (mainly for wet prevention) and direct spinning in homogeneous state. Its gloss is similar to that of mulberry silk.

Five, nylon yarn (short silk called nylon, filament called nylon filament).

Xi said: nylon, nylon and Kapp lung. It consists of amide chains linked to aliphatic groups or aliphatic rings. The corresponding aliphatic polyamide fibers are referred to according to the number of carbon molecules in the polycondensation component. Such as polymerization of polyamide monomers. Polyamide 66 fibers are formed by condensation of adipic acid containing 6 carbon atoms. Gloss is divided into semifluid and glossy. It resembles silk like silk and is made from its raw material.

Six, cotton silk (short silk called polyester, filament called polyester filament).

Xi said: polyester is really cool. The macromolecules of polyesters are synthesized from polyols and binary acids or W- hydroxy acids. The fibers were prepared by solvent spinning and then processed into silk. It resembles silk like silk and is made from its raw material.

Seven, vinylon yarn (short silk called vinylon, filament called vinylon)

Xi said: vinylon and yarn. A polymer derived from polyvinyl acetate by saponification.

Eight. Acrylic fiber (short silk is called acrylic fiber, filament is called acrylic fiber).

Xi said: Aaron, cashmere, and AI crane. The polymerization of acrylonitrile is called. The polymerization of acrylonitrile is a chain reaction of free stem type. According to the different solution (medium), homogeneous solution polymerization and heterogeneous solution polymerization can be divided. The solution of the solution is concentrated aqueous solution of sodium thiocyanate, two methyl sulfoxide, two methyl amide, etc. the aqueous solution of the heterogeneous solution is used as the medium, and the polymer is precipitated continuously in the polymerization process. The polymerization solution obtained by homogeneous solution polymerization directly spun into acrylic fiber.

Nine, polypropylene fiber

Scientific name: polypropylene fiber. Xi said: polypropylene and parlon. Named, short silk is called polypropylene, and filament is called polypropylene fiber. A polymer formed by polymerization of propylene.

Ten, polyvinyl chloride fiber

Scientific name: PVC fiber. Xi said: there is no dragon or chlorine fiber. Name: short silk is called polyvinyl chloride, and filament is called polyvinyl chloride fiber. A polymer derived from vinyl chloride by free radical polymerization.