How to identify various non-woven materials

Update:29 Sep 2021
Summary:

   1. Hand-feeling and visual inspection method: This m […]

   1. Hand-feeling and visual inspection method: This method is suitable for non-woven fabric raw materials in loose fiber state.
  (1),Cotton fiber is shorter and thinner than ramie fiber and other hemp fiber and wool fiber, and it is often accompanied by various impurities and defects.
   (2),hemp fiber has a rougher hand.
  (3),the wool fiber is curled and elastic.
   (4),Silk is a long filament, long and slender, with a special luster.
  (5),Among chemical fibers, only viscose fiber has a large difference in strength between dry and wet states.
  (6),Spandex yarn has very large elasticity, and its length can be stretched to more than five times at room temperature.
  2. Microscopic observation method: It is to identify non-woven fibers based on the longitudinal and cross-sectional morphological characteristics of the fibers.
   (1),cotton fiber: cross-sectional shape: round waist with middle waist; longitudinal shape: flat ribbon shape with natural twist.
   (2),hemp (ramie, flax, jute) fiber: cross-sectional shape: round or polygonal waist, with a middle cavity; longitudinal shape: horizontal nodes, vertical lines.
   (3),wool fiber: cross-sectional shape: round or approximately round, some with hair pith; longitudinal shape: scales on the surface.
   (4),Rabbit hair fiber: cross-sectional shape: dumbbell-shaped with hair pith; longitudinal shape: scales on the surface.
   (5),Mulberry silk fiber: cross-sectional shape: irregular triangle; longitudinal shape: smooth and straight, with stripes in the longitudinal direction.
   (6),Ordinary viscose: cross-sectional shape: zigzag, skin-core structure; longitudinal shape: longitudinal grooves.
   (7),rich and strong fiber: cross-sectional shape: less tooth shape, or round, oval; longitudinal shape: smooth surface.
   (8),acetate fiber: cross-sectional shape: trilobal or irregular zigzag; longitudinal shape: longitudinal stripes on the surface.
   (9),Acrylic fiber: cross-sectional shape: round, dumbbell or leaf shape; longitudinal shape: smooth or striped surface.
   (10),Chlorine fiber: cross-sectional shape: close to circular; longitudinal shape: smooth surface.
   (11),spandex fiber: cross-sectional shape: irregular shape, round, potato-shaped; longitudinal shape: dark and deep surface, showing unclear bone-shaped stripes.
   (12),polyester, nylon, polypropylene fibers: cross-sectional shape: round or special shape; longitudinal shape: smooth.
   (13),vinylon fiber: cross-sectional shape: round waist, skin-core structure; longitudinal shape: 1 to 2 grooves.