[TMD 303] - Midterm Exam Guide - Everything you need to know! (22 pages long)
5 Oct 2016
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Cellulosic: seed hair, cotton, kapok, bast, linen (faux, hemp, jute, ramie, leaf, stiff, pina, mineral, abestors, protein, silk, wool, (other animal hair)^ Manufactured fibers: regenerated, cellulose, rayon, acetate, lyocell, inorganic. 9/12: glass, metallic, ceramic, synthetic, nylon, polyester, direct, denier, tex, dictex. Fineness: as thick, 16x more flexible, hand comfort , fatter it is, itchier it is. 13. fibers resistance to extension: separate from fineness = flexible. Can use strength as a reinforcement in something else. Elongation: how much will it stretch before it breaks, % of original length, ex: kevlar 2% stretch, cotton 5% not very stretchy, rayon & wool 20-30, elastane 600-700% Does the fabric go back to shape: how much does it go back to original dimensions, % recovery from % elongation. Specific gravity (density: water = 1, olefin = . 91, most fibers 1. 1 -1. 5, glass 2. 6. Moisture properties: dry fiber, standard conditium 65% rm, regains moisture , take notes.
