|
Viscose Process
Rayon is a semi-synthetic fiber, made from natural sources of regenerated cellulose, such as wood and related agricultural products. It has the same molecular structure as cellulose. It is also called viscose. Many types and grades of viscose fibers and films exist. Some imitate the feel and texture of natural fibers such as silk, wool, cotton, and linen. The types that resemble silk are often called artificial silk. The fibre is used to make textiles for clothing and other purposes. Rayon production involves solubilizing cellulose to allow turning the fibers into required form. Three common ways to solubilize are the cuprammonium process, not in use today, using ammoniacal solutions of copper salts; the viscose process, the most common today, using alkali and carbon sulfide; and the Lyocell process, using amine oxide. The last avoids the neurotoxic carbon sulfide of the viscose process but is also more expensive. Rayon and its variants Rayon is produced by dissolving ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rayon Synthesis
Rayon is a semi-synthetic fiber, made from natural sources of regenerated cellulose fiber, cellulose, such as wood and related agricultural products. It has the same molecular structure as cellulose. It is also called viscose. Many types and grades of viscose fibers and films exist. Some imitate the feel and texture of natural fibers such as silk, wool, cotton, and linen. The types that resemble silk are often called Art silk, artificial silk. The fibre is used to make textiles for clothing and other purposes. Rayon production involves solubilizing cellulose to allow turning the fibers into required form. Three common ways to solubilize are the Cuprammonium rayon, cuprammonium process, not in use today, using ammoniacal solutions of copper salts; the viscose process, the most common today, using alkali and Carbon_disulfide, carbon sulfide; and the Lyocell process, using amine oxide. The last avoids the neurotoxic carbon sulfide of the viscose process but is also more expensive. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuprammonium
Schweizer's reagent is the metal ammine complex with the formula u(NH3)4(H2O)2OH)2. This deep-blue compound is used in purifying cellulose. It is prepared by precipitating copper(II) hydroxide from an aqueous solution of copper sulfate using sodium hydroxide or ammonia, then dissolving the precipitate in a solution of ammonia. It forms an azure solution. Evaporation of these solutions leaves light blue residue of copper hydroxide, reflecting the lability of the copper-ammonia bonding. If conducted under a stream of ammonia, then deep blue needle-like crystals of the tetrammine form. In presence of oxygen, concentrated solutions give rise to nitrites Cu(NO2)2(NH3)''n''. The nitrite results from oxidation of the ammonia. Reactions with cellulose Schweizer's reagent was once used in production of cellulose products such as rayon and cellophane (see cupro). Cellulose, which is quite insoluble in water (hence its utility as clothing), dissolves in the presence of Schweizer's reagent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aachen
Aachen ( ; ; Aachen dialect: ''Oche'' ; French and traditional English: Aix-la-Chapelle; or ''Aquisgranum''; nl, Aken ; Polish: Akwizgran) is, with around 249,000 inhabitants, the 13th-largest city in North Rhine-Westphalia, and the 28th-largest city of Germany. It is the westernmost city in Germany, and borders Belgium and the Netherlands to the west, the triborder area. It is located between Maastricht (NL) and Liège (BE) in the west, and Bonn and Cologne in the east. The Wurm River flows through the city, and together with Mönchengladbach, Aachen is the only larger German city in the drainage basin of the Meuse. Aachen is the seat of the City Region Aachen (german: link=yes, Städteregion Aachen). Aachen developed from a Roman settlement and (bath complex), subsequently becoming the preferred medieval Imperial residence of Emperor Charlemagne of the Frankish Empire, and, from 936 to 1531, the place where 31 Holy Roman Emperors were crowned Kings of the Germans. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oberbruch Industry Park
Oberbruch Industry Park (German: Industriepark Oberbruch), is a former site of Akzo Nobel in Heinsberg, Germany's most western district, near the Dutch border. It was founded in 1891 as a location for fiber industries. It is the birthplace of the German rayon and man-made fiber industry. Today, it is a diversified multi-user site, hosting companies from fields of industry such as high-performance fibers and energy technologies as well as from industrial biotechnology. Oberbruch Industry Park is the competency center for carbon (fiber) technology in North Rhine-Westphalia (NRW). Since 2000, the industry park has been operated by the Dutch energy company Nuon, the first independent industrial park operator not to come from the chemical industry. Since January 7, 2009 N.V. Nuon Energy has been part of Vattenfall. Rayon and man-made fibre industry Rheinische Glühlampenfabrik Dr. Max Fremery & Co Today's Oberbruch Industry Park was founded as "Rheinische Glühlampenfabrik Dr. M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vereinigte Glanzstoff Fabriken AG
Vereinigte Glanzstoff-Fabriken (VGF, United Rayon Factories) was a German manufacturer of artificial fiber founded in 1899 that became one of the leading European producers of rayon. During the first thirty years VGF cooperated closely with the British manufacturer Courtaulds and other companies to share technology and maintain prices by avoiding competition. It merged with the Dutch firm Enka in 1929 under the holding company Algemene Kunstzijde Unie (AKU), but the two retained their legal identities. AKU made significant investments in rayon production in the United States. The company suffered government interference in Nazi Germany (1933–45) and lost competitive strength during World War II, but partly recovered after the war with American assistance. In 1969 AKU merged with the Dutch manufacturer KZO to form AKZO, now part of AkzoNobel. Successor companies formed during various divestitures, mergers and acquisitions continue to be active in various related industries. Origi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Textiles
Textile is an umbrella term that includes various fiber-based materials, including fibers, yarns, filaments, threads, different fabric types, etc. At first, the word "textiles" only referred to woven fabrics. However, weaving is not the only manufacturing method, and many other methods were later developed to form textile structures based on their intended use. Knitting and non-woven are other popular types of fabric manufacturing. In the contemporary world, textiles satisfy the material needs for versatile applications, from simple daily clothing to bulletproof jackets, spacesuits, and doctor's gowns. Textiles are divided into two groups: Domestic purposes onsumer textilesand technical textiles. In consumer textiles, aesthetics and comfort are the most important factors, but in technical textiles, functional properties are the priority. Geotextiles, industrial textiles, medical textiles, and many other areas are examples of technical textiles, whereas clothing and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuprammonium Rayon
Cuprammonium rayon is a rayon fiber made from cellulose dissolved in a cuprammonium solution, Schweizer's reagent. It is produced by making cellulose a soluble compound by combining it with copper and ammonia with caustic soda. The solution is passed through a spinneret and the cellulose is regenerated in hardening baths that remove the copper and ammonia and neutralize the caustic soda. Cuprammonium rayon is usually made in fine filaments that are used in lightweight summer dresses and blouses, sometimes in combination with cotton to make textured fabrics with slubbed, uneven surfaces. The fabric is commonly known by the trade name "Bemberg", owned by the J.P. Bemberg company. The fabric may also be known as "cupro" or "cupra". It is also known as "ammonia silk" on Chinese fashion retail websites. History Cuprammonium rayon was invented in 1890. Swiss chemist Matthias Eduard Schweizer (1818–1860) discovered that cellulose dissolves in tetraaminecopper dihydroxide. Max Fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light Bulb
An electric light, lamp, or light bulb is an electrical component that produces light. It is the most common form of artificial lighting. Lamps usually have a base made of ceramic, metal, glass, or plastic, which secures the lamp in the socket of a light fixture, which is often called a "lamp" as well. The electrical connection to the socket may be made with a screw-thread base, two metal pins, two metal caps or a bayonet cap. The three main categories of electric lights are incandescent lamps, which produce light by a filament heated white-hot by electric current, gas-discharge lamps, which produce light by means of an electric arc through a gas, such as fluorescent lamps, and LED lamps, which produce light by a flow of electrons across a band gap in a semiconductor. Before electric lighting became common in the early 20th century, people used candles, gas lights, oil lamps, and fires. Vasily Vladimirovich Petrov developed the first persistent electric arc in 1802, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon (fiber)
Carbon fibers or carbon fibres (alternatively CF, graphite fiber or graphite fibre) are fibers about in diameter and composed mostly of carbon atoms. Carbon fibers have several advantages: high stiffness, high tensile strength, high strength to weight ratio, high chemical resistance, high-temperature tolerance, and low thermal expansion. These properties have made carbon fiber very popular in aerospace, civil engineering, military, motorsports, and other competition sports. However, they are relatively expensive compared to similar fibers, such as glass fiber, basalt fibers, or plastic fibers. To produce a carbon fiber, the carbon atoms are bonded together in crystals that are more or less aligned parallel to the fiber's long axis as the crystal alignment gives the fiber a high strength-to-volume ratio (in other words, it is strong for its size). Several thousand carbon fibers are bundled together to form a tow, which may be used by itself or woven into a fabric. Carbon f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Urban
Johann Urban (or Johannes Urban, 7 June 1863 – 13 November 1940) was an Austrian chemist and industrialist. He was one of the pioneers of the artificial silk industry. Early years Johann Urban was born on 7 June 1863 in Wuchern (now Vuhred) near Marburg (Maribor) in Lower Styria, Austria. His father was a timber merchant. He studied mechanical and electrical engineering in Graz, and expected to work as a teacher at a state vocational school. Instead, he found work in a light bulb factory in Rotterdam, where he met Max Fremery. In the mid-1880s Urban and Fremery took over the technical management of a light bulb factory in Gelnhausen. Lamp manufacture (1885–1900) The Swiss chemist Matthias Eduard Schweizer (1818–60) had found in 1857 that cotton could be dissolved in a solution of copper salts and ammonia and then regenerated. In 1890 the French chemist Louis Henri Despeissis invented the cuprammonium process for spinning fibers from cotton dissolved in Schweizer's reagent. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Max Fremery
Max Fremery (29 March 1859 – 1 March 1932) was a German chemist and industrialist. He was one of the founders of the (VGF) in 1899. VGF became a major manufacturer of artificial fibers. Early years (1859–85) Fremery was born in Cologne on 29 March 1859. His parents were Christian Fremery (1816–63), a wine and textile merchant, and Julie Vinman (1816–89). He worked in the workshops of the Rhenish Railway Company (') in Cologne, and then in the blast furnace and steelworks of '. He studied chemistry, graduating in Freiburg im Breisgau, then worked as a chemist, including working in England for a period. In 1883 he was employed with the ''Electriciteits Maatschappij'' in Rotterdam in developing a light filament. In the mid-1880s Fremery and the Austrian engineer Johann Urban (1863–1940), whom he had met in Amsterdam, took over the technical management of a light bulb factory in Gelnhausen. In 1885 Fremery married Margarete Alder. She died in 1892, and in 1897 he married ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schweizer's Reagent
Schweizer's reagent is the metal ammine complex with the formula u(NH3)4(H2O)2OH)2. This deep-blue compound is used in purifying cellulose. It is prepared by precipitating copper(II) hydroxide from an aqueous solution of copper sulfate using sodium hydroxide or ammonia, then dissolving the precipitate in a solution of ammonia. It forms an azure solution. Evaporation of these solutions leaves light blue residue of copper hydroxide, reflecting the lability of the copper-ammonia bonding. If conducted under a stream of ammonia, then deep blue needle-like crystals of the tetrammine form. In presence of oxygen, concentrated solutions give rise to nitrites Cu(NO2)2(NH3)''n''. The nitrite results from oxidation of the ammonia. Reactions with cellulose Schweizer's reagent was once used in production of cellulose products such as rayon and cellophane (see cupro). Cellulose, which is quite insoluble in water (hence its utility as clothing), dissolves in the presence of Schweizer's reagent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
_in_2002.png "Click for more on -> Viscose Process")
4(OH)2.png "Click for more on -> Cuprammonium")
