Wednesday, November 25, 2020

Polyester Shirt

Polyester Shirt 


In 1929 Wallace Carothers, a researcher at DuPont, published an article describing his creation of polyester. DuPont obtained patents on this early form of polyester in 1931. Facing problems with this material, DuPont did not begin commercialization of it at that time, choosing instead to concentrate on the development of nylon. In the 1940s English researchers at Imperial Chemical Industries (ICI) developed the first practical version of polyester. It was made by combining ethylene glycol and terephthalic acid into polyethylene terephthalate (PET). DuPont bought the rights to PET in 1945 and began commercial production of Dacron polyester in 1953.

Polyester Defined

The Federal Trade Commission defines polyester as "a manufactured fiber in which the fiber-forming substance is any long-chain synthetic polymer composed of at least 85 percent by weight of an ester of a substituted aromatic carboxylic acid, including but not restricted to substituted terephthalic units, p(-R-O-CO-C6H4-CO-O-)x and parasubstituted hydroxyl-benzoate units, p(-R-O-CO-C6H4-O-)x" (Collier and Tortor, p. 179). The polyester most commonly used for fibers is PET.

Care of Polyester

Polyester is often blended with other fibers that require different care procedures. For this reason care procedures may vary across fabrics.

For 100 percent polyester fabrics, oily stains should be removed before washing. Generally they can be machine washed on a warm or cold setting using a gentle cycle. They can be tumble dried on a low setting and should be removed from the dryer as soon as the cycle is completed. Garments should immediately be either hung on hangers or folded. When handled in this way, fabrics made from 100 percent polyester rarely need ironing. If a touch-up is needed, it should be done at a moderate temperature on the wrong side of the fabric.

Some garments made from polyester or polyester blends may require dry cleaning. Tailored garments with multiple components, such as suits, may need to be drycleaned. It is important to follow care instructions and not assume that dry cleaning is better than washing. Pigment prints on polyester should not be dry cleaned, as the solvent would dissolve the adhesive that holds the pigment on the surface of the fabric.

Uses of Polyester

Polyester could be called the tofu of manufactured fibers since its appearance takes on many forms. Depending upon the actual manufacturing process, polyester can resemble silk, cotton, linen, or wool. When blended with other fibers, polyester takes on even more forms, combining the good qualities of each contributing fiber. Polyester is also the most-used manufactured fiber. The DuPont company estimates that the 17.7 million metric tons consumed worldwide in 1995 will rise to almost 40 million metric tons by 2005.

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