Due to the impact of the epidemic, non-woven fabrics are being produced in large quantities. How can mask non-woven fabric manufacturers distinguish between various non woven fabric materials?
Hand feel visual measurement method
This method is mainly used for non-woven fabric raw materials in a dispersed fiber state.
(1) Cotton fiber is shorter and thinner than ramie fiber and other hemp fibers, and often contains various impurities and defects.
(2) Hemp fiber has a rough and hard textur
(3) Wool fibers are curled and elastic.
(4) Silk is a long and delicate filament with a special luster.
(5) The difference in super strength between dry and wet states of only viscose fibers in chemical fibers is significant.
(6) Spandex yarn has a particularly high elasticity, and its length can stretch to more than five times at room temperature.
Microscopic observation method
It identifies non-woven fabric fibers based on their longitudinal and cross-sectional shape characteristics.
(1) Cotton fiber: cross-sectional shape: waist circular, with a mid waist; Longitudinal shape: flat strip with natural curvature.
(2) Hemp (ramie, flax, jute) fiber: cross-sectional shape: waist round or polygonal, with a central cavity; Longitudinal shape: with transverse nodes and vertical lines.
(3) Wool fiber: Cross sectional shape: circular or nearly circular, some with wool fibers; Vertical shape: The surface has scales.
(4) Rabbit hair fiber: cross-sectional shape: dumbbell shaped, with hair pulp; Vertical shape: The surface has scales.
(5) Mulberry silk fiber: cross-sectional shape: irregular triangle; Longitudinal shape: Smooth and straight, with stripes in the vertical direction.
(6) Ordinary viscose fiber: cross-sectional shape: serrated, leather core structure; Vertical shape: There are grooves in the vertical directin.
(7) Rich and strong fibers: cross-sectional shape: less toothed, or circular, elliptical; Longitudinal shape: Smooth surface.
(8) Acetate fiber: cross-sectional shape: trilobed or irregularly serrated; Longitudinal shape: The surface has vertical stripes.
(9) Acrylic fiber: cross-sectional shape: circular, dumbbell shaped, or leaf shaped; Longitudinal shape: Smooth or striped surface.
(10) Chlorinated fiber: cross-sectional shape: nearly circular; Longitudinal shape: Smooth surface.
(11) Spandex fiber: cross-sectional shape: irregular shape, including circular and potato shaped; Longitudinal shape: The surface is dark and appears as unclear bone shaped stripes. (12) Polyester, nylon, and polypropylene fibers: Cross sectional shape: circular or irregular; Vertical shape: Smooth.
(13) Vinylon fiber: cross-sectional shape: waist circle, leather core structure; Vertical shape: 1-2 grooves.
Density gradient method
It is based on the characteristics of different densities of various fibers to distinguish non-woven fibers.
(1) A density gradient solution is usually prepared using a xylene carbon tetrachloride system.
(2) The commonly used method for calibrating density gradient tubes is the precision ball method.
(3) Measurement and calculation: The fiber to be tested is subjected to pre-treatment such as degreasing, drying, and defoaming. After being made into small balls and balanced, the fiber density is measured according to the fiber suspension position.
Fluorescence method
Using ultraviolet fluorescent lamps to directly irradiate non-woven fabric fibers, identifying non-woven fabric fibers based on their different luminescent characteristics and fluorescence colors. The specific display information of fluorescent colors of various non-woven fibers.
(1) Cotton and wool fibers: light yellow.
(2) Silk cotton fiber: light red.
(3) Huangma (raw) fiber: purple brown.
(4) Huangma, silk, nylon fibers: light blue.
(5) Adhesive fiber: white purple shadow.
(6) Light adhesive fiber: light yellow purple shadow.
(7) Polyester fiber: White light, blue sky light is very bright.
(8) Vinylon optical fiber: light yellow purple shadow.
Dongguan Liansheng Nonwoven Fabric Co., Ltd., a manufacturer of non-woven fabrics and non-woven fabrics, is worthy of your trust!
Post time: Jul-24-2024