Wednesday, May 22, 2013
INFORMATION ABOUT OUR FABRICS
http://www.youtube.com/watch?v=xoENzofbYqI&feature=c4-overview&list=UU-Zg86WY9jlkA1iLqoCki-QPolyester is a term often defined as “long-chain polymers
chemically composed of at least 85% by weight of an ester and a dihydric alcohol
and a terephthalic acid”. In other words, it means the linking of several esters
within the fibers. Reaction of alcohol with carboxylic acid results in the
formation of esters.Polyester also refers to the various polymers in which the backbones are
formed by the “esterification condensation of polyfunctional alcohols and
acids”.Polyester can also be classified as saturated and unsaturated polyesters.Saturated polyesters refer to that family of polyesters in which the
polyester backbones are saturated. They are thus not as reactive as unsaturated
polyesters. They consist of low molecular weight liquids used as plasticizers
and as reactants in forming urethane polymers, and linear, high molecular weight
thermoplastics such as polyethylene terephthalate (Dacron and Mylar). Usual
reactants for the saturated polyesters are a glycol and an acid or anhydride.
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