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in Help Wanted Mon Jun 06, 2016 1:09 am
by bearyin • 41 Posts | 410 Points

We don't mean to be alarmist Wholesale NFL Jerseys , but we sometimes see "silk rugs" that are made of something other than genuine, natural silk. This is not a problem if you know that the rug you are considering is made of artificial silk, but sometimes rug dealers neglect to pass on this information! The problem happens most often with just a few rug types sold in tourist markets in Turkey and India (and sometimes in Pakistan).
Real Silk
Real silk is produced as the cocoon covering of the silkworm, the pupal form of the Asian or mulberry silk moth, bombyx mori. The cocoon is spun by the silk moth caterpillar of a single silk fiber that can be up to several thousand feet in length. To harvest the silk, completed cocoons are boiled or heated to kill the silkworms, then laboriously unwound into single fibers which are plied together and spun into thread or silk yarn.
Artificial Silk
Artificial silk is everything billed as silk that doesn't come from the silkworm cocoon. Most often this means mercerized cotton; sometimes it means a manufactured fiber like rayon or a blend of chemically altered andor manufactured fibers. It's not that artificial silk is intrinsically evil, it's just that the whole point of using artificial silk in a rug is to save the cost of real silk. It is not nice when this cheaper, artificial silk rug is misrepresented and sold for the price of a real silk rugs.
Mercerized cotton
A ripening cotton boll can contain as many as 5,000 separate cotton fibers, each fiber growing from a tiny seed and formed as a hollow cylindrical sheath of as many as thirty layers of almost pure cellulose. Cotton fiber is mercerized by being stretched under controlled tension at room temperature while being treated with a 21 solution of caustic soda (NaOH). The effect is to swell the fiber and make its surface much more reflective, thus dramatically increasing its luster (and also its tensile strength). After the chemical treatment Wholesale Jerseys For Cheap , cotton yarn is often singed to remove whatever small amount of fuzz remains on the surface of the fibers. Sometimes cotton is calendered by being passed between heated rollers. The effect is to increase the luster and sheen of the fiber still more. However it is treated, cotton remains cellulose: C6H10O5.
Like cotton, rayon is made of almost pure celulose, but rather than being grown, rayon is produced by first dissolving cellulose (obtained from cotton or woodpulp) to produce a thick yellow liquid called viscose. The viscose is extruded through tiny holes into a chemical bath that produces long filaments which can be spun into thread and yarn. Viscouse rayon was the first man-made fiber. In 1920, DuPont bought from the French the technology for making viscose rayon. DuPont first called the material "artificial silk", and formed a company (The DuPont Fibersilk Company) to manufacture it. Other artificial fibers would follow quickly: acetate (also derived from cellulose) in 1924, nylon, (commonly, adipic acid reacted with hexamethylene diamine) in 1939, acrylic (from acrylonitrile, a petrochemical) in 1950 Wholesale Jerseys From China , polyester in 1953, and triacetate in 1954.

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