Textile testing method 3

(8), acetate fiber: cross-sectional morphology: trilobal or irregular zigzag; longitudinal morphology: the surface has vertical stripes.

(9), Acrylic fiber: cross-sectional shape: round, dumbbell-shaped or leaf-like; longitudinal shape: smooth or streaked surface.

(10), polyvinyl chloride fiber: cross-sectional shape: close to a circle; vertical form: smooth surface.

(11), spandex fiber: cross-sectional shape: irregular shape, round, potato-shaped; vertical surface shape: dark dark surface, unclear bone-shaped stripes.

(12), polyester, nylon, polypropylene fiber: cross-sectional shape: round or shaped; vertical form: smooth.

(13), vinylon fiber: cross-sectional shape: waist round, sheath core structure; vertical surface shape: 1~2 grooves.