Identification of non woven fabrics

PublishTime:2021/3/31 13:01:35

1. Hand feeling visual test method: this method is applicable to non-woven fabric raw materials in loose fiber state.

(1) Cotton fiber is shorter and thinner than ramie fiber and other process fiber and wool fiber, often with various impurities and defects.

(2) The handle of hemp fiber is rough and hard.

(3) Wool fiber is curly and elastic.

(4) Silk is filament, long and thin, with special luster.

(5) The dry and wet state of viscose fiber are different.

(6) Spandex has great elasticity, and its length can be stretched to more than five times at room temperature.

2. Microscope observation: it is to identify the non-woven fiber according to the longitudinal and cross-sectional morphological characteristics of the fiber.

(1) Cotton fiber: cross section shape: waist round, with middle waist; longitudinal shape: flat belt, with natural curve.

(2) Ramie (ramie, flax, jute) fiber: cross section shape: waist round or polygonal, with middle cavity; longitudinal shape: cross section, vertical grain.

(3) Wool fiber: cross section shape: round or nearly round, some with pith; longitudinal shape: surface with scales.

(4) Rabbit hair fiber: cross section shape: dumbbell, with pith; longitudinal shape: with scales on the surface.

(5) Silk fiber: cross section shape: irregular triangle; longitudinal shape: smooth and straight, longitudinal stripe.

(6) Ordinary viscose fiber: cross section shape: serrated, skin core structure; longitudinal shape: longitudinal groove.

(7) Rich and strong fiber: cross section shape: less teeth, or round, oval; longitudinal shape: smooth surface.

(8) Acetate fiber: cross section shape: trilobal or irregular serrated; longitudinal shape: longitudinal stripes on the surface.

(9) Acrylic fiber: cross section shape: round, dumbbell or leaf shape; longitudinal shape: smooth or striped surface.

(10) Chloroprene fiber: cross section shape: close to round; longitudinal shape: smooth surface.

(11) Spandex fiber: cross section shape: irregular shape, round shape, potato shape; longitudinal shape: dark surface, unclear bone shaped stripes.

(12) Polyester, nylon, polypropylene fiber: cross section shape: round or irregular; longitudinal shape: smooth.

(13) Vinylon fiber: cross section shape: waist round, skin core structure; longitudinal shape: 1 ~ 2 grooves.


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