D is the abbreviation of DENIER (Denier). It is a method of fineness expression of chemical fibers. It refers to the weight in grams of a 9,000-meter-long wire at a given moisture regain, also known as denier.
The larger D is, the thicker the yarn is. Eg: 75D is thicker than 50D.
S is an abbreviation for English branch. It is used for the fineness expression of pure cotton yarn. It refers to the number of 840 yards (1 yard = 0.9144 meters) length of one pound weight (454 grams) of cotton yarn. That means there are several 840 yards. ,
It is a few branches, so the bigger the S, the finer the yarn. eg: 32S is thinner than 21S.
Textile fibre
★ (1) natural fibre
â— Plant fiber â—‹Seed fibre: Cotton: Mainly includes upland cotton and sea island cotton, and it is the main natural fiber. Kapok
â—‹ bast fiber: flax: linen is an annual or perennial bast fiber. Hemp (13) Ramie (China grass):
Ricinus communis is a bark of the perennial plant of the genus Urtica. Jute (Jute): Tianmake Jute is an annual herbaceous bark fiber.
â—‹ Leaf fibre: sisal hemp, Manila hemp â—‹ fruit fibre: coconut fibre
â— animal fibre hair: wool: mainly refers to sheep wool, which belongs to protein staple fiber. Rabbit hair:
It is mainly protein short fibers produced by Angora rabbits and rabbits. Camel hair: Thicker fibers, mainly used in industrial textiles. Secretion: tussah silk:
Wild silk, filaments spit from silkworms feeding on tussah silk. Mulberry silk: Silk filaments spun from silkworms that feed on mulberry leaves.
â— Mineral fiber: asbestos fiber
★(2) man-made fibre
â—‹Inorganic fiber: METAL fiber, glass fiber, rock fiber slag fiber, etc. (inorganic fiber: metal fiber, stone fiber, glass fiber, slag fiber, Etc.)
â—‹ Regenerated fiber: Viscose fiber: Viscose Fibre, Vicose Rayon, viscose regenerated cellulose fiber. Copper ammonia fiber: cuprammouium rayon,
Copper ammonia recycled cellulose fiber. ACETATE fiber: acetate fibre, a derivative of cellulose fiber, belonging to semi-synthetic fiber: polynosic, also known as "tiger kapok",
A variety of viscose fibers.
çº¤ç»´ç´ Cellulose ester fiber: Cellulose acetate-fiber: two-acetate fiber, three-acetate fiber
â—‹ artificial protein fiber: casein fiber, corn gluten fiber, soybean protein fiber, etc. (corn protein fiber, pea protein fiber)
★ (3) Synthetic fibre OR (chemical fiber)
â— Polyester fiber (polydimethyl terephthalate): Polyester (PET) is represented by T. (polyethylene terephthalate:polyester)
â— Polyamide fiber: Nylon (PA) is represented by N. Also called nylon, nylon. (polyamide, Nylon)
â— Polyacrylonitrile fiber: Acrylic fiber (PVN) is denoted by A, and abroad is called "Alon." (polyacrylonitrile, Acrylic)
â— Polyolefin fiber: polypropylene (PP) (Isotactic polypropylene)
â— Polyurethane fiber: spandex (OP) (polyruethane elastomeric fiber; spandex)
â— Polyvinyl acetal fiber: PVA V (vinylon)
â— PVC: chlorofibre (polyvinyl chloride fibre)
â— Other fibers: Aramid, Polyethylene and other special-shaped fibers: The physical and mechanical properties are improved by changing the cross-sectional shape of the fiber. For example, the triangle structure can increase the fiber luster and make the fabric silky glossy; the three-leaf or five-leaf structure has a fluffy texture. Good, good warmth, good air permeability, not easy pilling; hollow structure fiber is light, its warmth is good.
Melt-spinning: The polymer melt is heated and melted into a certain viscosity of the spinning melt, and is continuously and uniformly extruded by the spinning pump to the spinneret, and is extruded through the fine holes of the spinneret to form a filament stream.
Then it is cooled and solidified in air or water and drawn into filaments. (Nylon, Polyester, Polypropylene)
Dry-spinning: The high-molecular polymer is dissolved with a volatile solvent to make a viscous liquid suitable for spinning. The spun pulp is pressed out of the spinneret to form a filament stream, and the solvent in the filament stream is quickly volatilized through a hot air sleeve to solidify and is drawn into filaments. (Polychlorin, Acrylic, Vinylon, Cellulose)
Wet spinning: The fiber-forming high-molecular polymer is dissolved in a solvent to form a spinning solution, which is ejected by a spinneret to form a stream of viscous filaments, which is allowed to enter the coagulation liquid due to the diffusion of the solvent in the viscose filament stream and The coagulant penetrates into the flow of mucus filaments, causing the flow of filaments to solidify into fibers. Wet spinning is characterized by a large number of spinneret holes, but the spinning speed is slow, suitable for spinning short fibers, and dry spinning is suitable for spinning filaments. Generally, the same type of chemical fiber is produced by dry spinning and wet spinning, and the fiber structure is uniform and the quality is good.
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