L4_txc6 - o High tenacity o Excellent abrasion resistance o...

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16:25 Nylon fibers Manufactured fibers The fiber forming substance is any long chain synthetic polyamide in which  less than 85% of the amide linkages are attached to two aromatic rings Nylon 6,6 – higher melting point, flexible Nylon 6 Macro Same for both and can be controlled Micro Same for both Smooth surface shape and round or any shape across section Fine Polymer  polyamide DP  50-80 (MW= 12000-18000) Orientation  high (chains have a linear, zigzag configuration) Crystalline  65-85% Amorphous  15-35% Intermolecular bonds  dipole and van der waals and hydrogen Production Melt spinning Tm= 210 (nylon 6) and 250 (nylon 6,6) Characteristics of Nylon fibers
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Sheared structural features o High orientation o High crystallinity o Strong intermolecular interaction (H bonds) o Zigzag soft chain Resulted properties
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Unformatted text preview: o High tenacity o Excellent abrasion resistance o Good elastic recovery Structural difference o Nylon-66 has more H bonds than nylon 6 or has more intermolecular interaction Melting point Tm difference Property differences o Nylon 66 has higher melting pt o Nylon 66 has smaller elongation Print chart and notes Characteristics of Polyester fibers Good mechanical properties but low sorptive properties Melt spinning Easy to blend with natural fibers o Combinations for good mechanical and sorptive properties Many modified varieties o Cross sectional shape: hollow, triangular , striated, o Bicomponent fibers : sheath core, side by side o Microfibers o Chemically modified fibers Poor dyeability and low moisture regain Print chart and notes 16:25 16:25...
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This note was uploaded on 09/27/2011 for the course TXC 6 taught by Professor Na during the Spring '11 term at UC Davis.

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L4_txc6 - o High tenacity o Excellent abrasion resistance o...

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