Dictionary and translator for handheld
New : sensagent is now available on your handheld
A windows (pop-into) of information (full-content of Sensagent) triggered by double-clicking any word on your webpage. Give contextual explanation and translation from your sites !
With a SensagentBox, visitors to your site can access reliable information on over 5 million pages provided by Sensagent.com. Choose the design that fits your site.
Improve your site content
Add new content to your site from Sensagent by XML.
Crawl products or adds
Get XML access to reach the best products.
Index images and define metadata
Get XML access to fix the meaning of your metadata.
Please, email us to describe your idea.
Lettris is a curious tetris-clone game where all the bricks have the same square shape but different content. Each square carries a letter. To make squares disappear and save space for other squares you have to assemble English words (left, right, up, down) from the falling squares.
Boggle gives you 3 minutes to find as many words (3 letters or more) as you can in a grid of 16 letters. You can also try the grid of 16 letters. Letters must be adjacent and longer words score better. See if you can get into the grid Hall of Fame !
Change the target language to find translations.
Tips: browse the semantic fields (see From ideas to words) in two languages to learn more.
1.a synthetic silklike fabric
RayonRay"on (rā"ŏn), n. [F.] Ray; beam. [Obs.] Spenser.
Absheron Rayon • Abşeron Rayon • Agdam Rayon • Agdash Rayon • Aghjabadi Rayon • Agstafa Rayon • Agsu Rayon • Astara Rayon • Ağcabədi Rayon • Ağdam Rayon • Ağdaş Rayon • Ağstafa Rayon • Ağsu Rayon • Babek Rayon • Babək Rayon • Balakan Rayon • Balakən Rayon • Barda Rayon • Beylagan Rayon • Beyləqan Rayon • Bilasuvar Rayon • Biləsuvar Rayon • Bərdə Rayon • Culfa Rayon • Cəbrayıl Rayon • Cəlilabab Rayon • Dashkasan Rayon • Davachi Rayon • Daşkəsən Rayon • Dəvəçi Rayon • Fizuli Rayon • Füzuli Rayon • Gadabay Rayon • Gobustan Rayon • Goranboy Rayon • Goychay Rayon • Goygol Rayon • Göyçay Rayon • Gədəbəy Rayon • Hacıqabul Rayon • Hajigabul Rayon • Horokhivskyi Rayon • Hotel Belvédère du Rayon Vert • Ignacio López Rayón • Imishli Rayon • Indian Rayon and Industries • Ismailli Rayon • Ixtlahuaca de Rayón • Jabrayil Rayon • Jalilabad Rayon • Julfa Rayon • Kalbajar Rayon • Kangarli Rayon • Khachmaz Rayon • Khanlar Rayon • Khizi Rayon • Khojali Rayon • Khojavend Rayon • Kurdamir Rayon • Kürdəmir Rayon • Kəlbəcər Rayon • Kəngərli Rayon • Lachin Rayon • Lankaran Rayon • Lankaran Sahari Rayon • Laçın Rayon • Le Rayon U • Le Rayon vert • Lerik Rayon • Local mail and rayon stamps of Switzerland • Lǝnkǝran Şǝhǝri Rayon • Lǝnkǝran Şǝhǝri Rayon, Azerbaijan • Lənkəran (rayon) • Lənkəran Rayon • Masally Rayon • Masallı Rayon • Mitsubishi Rayon • Neftchala Rayon • Neftçala Rayon • Oghuz Rayon • Ordubad Rayon • Oğuz Rayon • Qabala Rayon • Qakh Rayon • Qax Rayon • Qazakh Rayon • Qazax Rayon • Qobustan Rayon • Quba Rayon • Qubadli Rayon • Qubadlı Rayon • Qusar Rayon • Qışlaq, Lachin Rayon • Qəbələ Rayon • Rayon Griffith • Rayon Payne • Rayon Sport • Rayon Terrace, Virginia • Rayon d'Or • Rayon de soleil • Rayón (municipality) • Rayón, San Luis Potosí • Rayón, Sonora • Saatly Rayon • Saatlı Rayon • Sabirabad Rayon • Sadarak Rayon • Salyan Rayon • Samukh Rayon • Samux Rayon • Shakhbuz Rayon • Shaki Rayon • Shamakhi Rayon • Shamkir Rayon • Sharur Rayon • Sheki (rayon) • Shusha Rayon • Siazan Rayon • Siyəzən Rayon • Sədərək Rayon • Tartar Rayon • Tovuz Rayon • Tərtər Rayon • Ucar (rayon) • Ucar Rayon • Ujar Rayon • Xanlar Rayon • Xaçmaz Rayon • Xocalı Rayon • Xocavənd Rayon • Xızı Rayon • Yardymli Rayon • Yardımlı Rayon • Yevlakh Rayon • Yevlax (rayon) • Yevlax Rayon • Zangilan Rayon • Zaqatala Rayon • Zardab Rayon • Zəngilan Rayon • Zərdab Rayon • İmişli Rayon • İsmayıllı Rayon • Şahbuz Rayon • Şamaxı Rayon • Şuşa Rayon • Şəki Rayon • Şəmkir Rayon • Şərur Rayon
fibre textile animale (fr)[Classe]
fibre textile (fr)[Classe]
étoffe et tissu (fr)[Classe]
chose en étoffe (fr)[ClasseParExt.]
tissage (fr)[termes liés]
Rayon is a manufactured regenerated cellulose fiber. Because it is produced from naturally occurring polymers, it is neither a truly synthetic fiber nor a natural fiber; it is a semi-synthetic or artificial fiber. Rayon is known by the names viscose rayon and art silk in the textile industry. It usually has a high luster quality giving it a bright sheen.
Some major rayon fiber uses include apparel (e.g. Aloha shirts, blouses, dresses, jackets, lingerie, linings, scarves, suits, neckties, hats, socks), the filling in Zippo lighters, furnishings (e.g. bedspreads, bedsheets, blankets, window treatments, upholstery, slipcovers), industrial uses (e.g. medical surgery products, non-woven products, tire cord), and other uses (e.g. yarn, feminine hygiene products, diapers, towels). Rayon is a major feedstock in the production of carbon fiber.
The fact that nitrocellulose is soluble in organic solvents such as ether and acetone made it possible for Georges Audemars to develop the first "artificial silk" in about 1855, but his method was impractical for commercial use. Commercial production started in 1891, but the result was flammable and more expensive than acetate or cuprammonium rayon. Because of this, production was stopped before World War I. It was briefly known as "mother-in-law silk." Nathan Rosenstein invented the spunize process by which he turned rayon from a hard fiber to a fabric. This allowed rayon to become a popular raw material in textiles.
Paul Schützenberger discovered that cellulose could be reacted with acetic anhydride to form cellulose acetate. The triacetate is only soluble in chloroform making the method expensive. The discovery that hydrolyzed cellulose acetate is soluble in more polar solvents, like acetone, made production of cellulose acetate fibers cheap and efficient.
The Swiss chemist Matthias Eduard Schweizer (1818-1860) discovered that tetraaminecopper dihydroxide could dissolve cellulose. Max Fremery and Johann Urban developed a method to produce carbon fibers for use in light bulbs in 1897. Production of cuprammonium rayon for textiles started in 1899 in the Vereinigte Glanzstoff Fabriken AG in Oberbruch. Improvement by the J. P. Bemberg AG in 1904 made the artificial silk a product comparable to real silk.
Finally, in 1894, English chemist Charles Frederick Cross, and his collaborators Edward John Bevan, and Clayton Beadle patented their artificial silk, which they named "viscose", because the reaction product of carbon disulfide and cellulose in basic conditions gave a highly viscous solution of xanthate. The first commercial viscose rayon was produced by the UK company Courtaulds Fibers in 1905. Avtex Fibers Incorporated began selling their formulation in the United States in 1910. The name "rayon" was adopted in 1924, with "viscose" being used for the viscous organic liquid used to make both rayon and cellophane. In Europe, though, the fabric itself became known as "viscose," which has been ruled an acceptable alternative term for rayon by the U.S. Federal Trade Commission.
The method is able to use wood (cellulose and lignin) as a source of cellulose while the other methods need lignin-free cellulose as starting material. This makes it cheaper and therefore it was used on a larger scale than the other methods. Contamination of the waste water by carbon disulfide, lignin and the xanthates made this process detrimental to the environment. Rayon was only produced as a filament fiber until the 1930s when it was discovered that broken waste rayon could be used in staple fiber.
The physical properties of rayon were unchanged until the development of high-tenacity rayon in the 1940s. Further research and development led to the creation of high-wet-modulus rayon (HWM rayon) in the 1950s. Research in the UK was centred on the government-funded British Rayon Research Association.
Rayon is a versatile fiber and has the same comfort properties as natural fibers. It can imitate the feel and texture of silk, wool, cotton and linen. The fibers are easily dyed in a wide range of colors. Rayon fabrics are soft, smooth, cool, comfortable, and highly absorbent, but they do not insulate body heat, making them ideal for use in hot and humid climates.
The durability and appearance retention of regular viscose rayon are low, especially when wet; also, rayon has the lowest elastic recovery of any fiber. However, HWM rayon is much stronger and exhibits higher durability and appearance retention. Recommended care for regular viscose rayon is dry-cleaning only. HWM rayon can be machine washed.
A sample of rayon from a skirt, photographed with a macro lens.
Regular rayon has lengthwise lines called striations and its cross-section is an indented circular shape. The cross-sections of HWM and cupra rayon are rounder. Filament rayon yarns vary from 80 to 980 filaments per yarn and vary in size from 40 to 5000 denier. Staple fibers range from 1.5 to 15 denier and are mechanically or chemically crimped. Rayon fibers are naturally very bright, but the addition of delustering pigments cuts down on this natural brightness.
Regular rayon (or viscose) is the most widely produced form of rayon. This method of rayon production has been utilized since the early 1900s and it has the ability to produce either filament or staple fibers. The process is as follows:
High wet modulus rayon (HWM) is a modified version of viscose that has a greater strength when wet. It also has the ability to be mercerized like cotton. HWM rayons are also known as "polynosic"[clarification needed] or can be identified by the trade name Modal.
Cupramonium rayon has properties similar to viscose but during production, the cellulose is combined with copper and ammonia (Schweizer's reagent). Due to the environmental effects of this production method, cupramonium rayon is no longer produced in the United States.
The biodegradability of fibers in soil burial and sewage sludge was evaluated by Korean researchers who found that biodegradability decreased in the following order: rayon, cotton, acetate (meaning rayon decays more readily than cotton). The ability of individual rayon-based fabrics to repel water was negatively correlated with their speed of degradation (meaning the greater the water-repelling ability of the fibre, the slower it will decompose).
Rising cotton prices in 2010 led clothing makers to begin replacing cotton with rayon in their fabrics. Designers such as Isaac Mizrahi have incorporated rayon into their newest designs. As demand for rayon increases, companies such as Fortress Paper have been investing in pulp mills to increase production. Rayon now sells for as much as $2.70 per pound, which has led to an increase in the retail price of clothing made with rayon, despite rayon's price advantage over cotton.
Rayon has been accused by some as contributing to the destruction of rain forests although rayon production can come from a wide variety of trees and most of its yearly production comes from renewable trees.
In early 2010, the U.S. Federal Trade Commission warned several retailers that six major manufacturers were falsely labeling rayon products as "bamboo", in order to appeal to environmentally conscious consumers. While rayon may be produced with bamboo as a raw material, and the two may be used for similar fabrics (though natural bamboo is not as smooth), rayon is so far removed from bamboo by chemical processing that the two are entirely separate.
Trade names are used within the rayon industry to determine the type of rayon used.
Modal and Tencel are widely used forms of rayon produced by Lenzing AG which is based in northern Austria. Tencel, generic name lyocell, is made by a slightly different solvent recovery process, and is considered a different fiber by the US FTC.
Galaxy, Danufil, and Viloft are rayon brands produced by Kelheim Fibres, a German manufacturer.
Grasim of India is the largest producer of rayon in the world (claiming 24% market share). It has plants in Nagda, Kharach and Harihar – all in India, as well as joint ventures in Canada, Laos and China.
For a description of the production method at a factory in Germany in World War II, see pages 152–155 of
||This article uses bare URLs for citations. Please consider adding full citations so that the article remains verifiable. Several templates and the Reflinks tool are available to assist in formatting. (Reflinks documentation) (October 2011)|
|Look up Bemberg in Wiktionary, the free dictionary.|
|Look up rayon in Wiktionary, the free dictionary.|