Chapter_4_-_Natural_Cellulosic_Fibers_-_Fall_2011-student_version

Chapter_4_-_Natural_Cellulosic_Fibers_-_Fall_2011-student_version

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NATURAL CELLULOSIC FIBERS CHAPTER 4 1
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Cellulosic Fibers Plant Sources seed hair fibers bast fibers leaf fibers miscellaneous fibers 2
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THE CELLULOSE FAMILY General Characteristics of Cellulosic Fibers density elasticity & resiliency electrical & heat conductivity 3
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General Characteristics bases & acids heat silverfish, fungi, mildew, rot environmental conditions 4
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SEED HAIR FIBERS COTTON Cotton in the Global Market most used natural fiber in the world China, U.S., India polyester 5
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SEED HAIR FIBERS COTTON The Cotton Plant short, staple fibers 3/8” – 3/4” intermediate staple fibers 13/16” – 1-1/4” long staple fibers 1.5” – 2.5” lint, linters 6
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SEED HAIR FIBERS COTTON Production of the Fiber quality evaluation - “graded” micronaire carding spinning 7
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SEED HAIR FIBERS COTTON Molecular Structure high dp -OH groups attract water, dye hydrogen bonds 70% crystalline/30% amorphous 8
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SEED HAIR FIBERS COTTON Properties of Cotton Physical Properties color white, tan, green, brown, mauve shape kidney bean lumen convolutions 9
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10 fibrals layers that spiral & reverse directions
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SEED HAIR FIBERS COTTON luster low specific gravity feels heavier than polyester, nylon 11
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SEED HAIR FIBERS COTTON Mechanical Properties strength medium modulus moderately high low resilience flexibility 12
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COTTON
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This note was uploaded on 01/16/2012 for the course BIO 1002 taught by Professor Hrinchevich during the Fall '10 term at LSU.

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Chapter_4_-_Natural_Cellulosic_Fibers_-_Fall_2011-student_version

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