广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Classifications of fibers 日 Inorganic ■ Natura 口 asbestos ■ Manmade 日 glass a carbon/graphite a ceramic 口meta
Classifications of fibers Inorganic ◼ Natural asbestos ◼ Manmade glass carbon/graphite ceramic metal
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Classifications of fibers D Engineered fibers Bicomponent fibers: · Sheath-core 口 Side by side a island in sea(matrix fibril) □ Citrus a Unconventionally shaped 4DG ■Ho|lOW
Classifications of fibers Engineered fibers • Bicomponent fibers: • Sheath-core Side by side Island in sea (matrix fibril) Citrus Unconventionally shaped ◼ 4DG ◼ Hollow
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Fibers and their properties a Natural protein fibers I high resilience a ability to do work against restraining forces during returning from deformed state Hygroscopic or hydrophilic d likes water and absorbs water ■ High heat of wetting Most mechanical properties change when absorbing water
Fibers and their properties Natural protein fibers ◼ high resilience ability to do work against restraining forces during returning from deformed state ◼ Hygroscopic or hydrophilic likes water and absorbs water ◼ High heat of wetting ◼ Most mechanical properties change when absorbing water
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Fibers and their properties a Natural protein fibers Harmed by alkalis e.g. Naoh harmed by chlorine bleach perspiration Weakened yellowed by Uv light ■ Not readily flammable
Fibers and their properties Natural protein fibers ◼ Harmed by alkalis, e.g. NaOH ◼ Harmed by chlorine bleach & perspiration ◼ Weakened & yellowed by UV light ◼ Not readily flammable
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Fibers and their properties d Natural cellulose fibers High moisture absorption Mechanical properties change up on water absorption I Swells in water but reversible upon drying High resistance to alkaline degradation ■ Low resilience
Fibers and their properties Natural cellulose fibers ◼ High moisture absorption ◼ Mechanical properties change up on water absorption ◼ Swells in water but reversible upon drying ◼ High resistance to alkaline degradation ◼ Low resilience