fiber and fabric basics 1-8-08

fiber and fabric basics 1-8-08 - Fiber and Fabric Basics...

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1 Fiber and Fabric Basics Douglas J. Gardner Professor Wood-Polymer Hybrid Composites Fibers • aramid • carbon • glass wood (lignocellulosic) • nanocellulose
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2 Surface Energy of Fibers Material Surface Free Energy (mJ/m2) Carbon (intermediate modulus) 50 - 56 Carbon (high modulus) 40 - 50 Glass (untreated) 55 - 65 Glass (sized) 30 - 46 Aramid (Kevlar ® ) 40-46 Wood 40-60 Fiber Terminology Denier - unit of fineness for fibers. The weight in grams of 9000 meters of yarn or fiber. Pulp - mass or group of short fibers with high degree of fibrillation Braid - woven or plaited flat, round, or tubular narrow fabric. Yarn - twisted strand Roving - collection of parallel continuous strands Tow (strand)- untwisted bundle of continuous fibers
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