|
|
|
 News |
|
Three method to identify the filter cloth
|
| Published：2013.06.17 Reads： |
| |
Identification cloth fibers in many ways, there are microscopic observation, combustion method, densitometry, staining, coloring agents and dissolution method. Only a method generally can not immediately identify the type of fiber cloth must be based on the test results of a number of ways to make a comprehensive analysis. Preliminary identification, first with less time-consuming method of burning or microscopic observation, when this method can not meet the requirements, and then supplemented by other methods of identification.
A microscope observation method
Y172 slicer with fibers, the fibers are cut into very thin cross-section slightly, using general biological microscope, to observe a variety of longitudinal and transverse cross-section fiber shape, fiber shape to distinguish from a variety of natural fibers and chemical category. However, synthetic form can do roughly distinguish. The profiled fiber chemical fiber, the longitudinal and horizontal shape geometry with different nozzle orifice without one it is not included in this range, generally triangular shaped fibers, bean-shaped, oval, or irregular cross and so on.
Second, the combustion method
1, Nylon: melting shrinkage near the flame, contact with the flame slowly burning, melting, leaving the flame easily extinguished amide smell, like transparent glass ball, before cooling stretch linearly.
2, polyester: near the flame melts contraction, slow burning flame contact, leave the flame continues to burn fragrant hard black beads.
3, acrylic: melting shrinkage near the flame, burning flame contact molten black smoke, a special smell, not stereotypes black lumps.
4, polyvinyl alcohol: one side near the flame after the contraction side burning, black smoke, special sweetness, irregularly shaped hard black ashes.
5, polyvinyl chloride: melting shrinkage near the flame, contact with the flame burning, leave the flame to extinguish, a special smell, very crisp black ashes.
6, polypropylene: near the flame edge melt, while burning, slight asphalt odor, hard brown ball.
7, cellulose acetate: melting shrinkage near the flame, contact with the flame burning, leave the flame continues to burn, acid flavor, pine and crisp black ash, unburned portion was black blocks.
8, silk, wool: curling burning, while foam while taking fire, burning hair taste, crunchy black lumps or beads.
9, cotton, viscose, linen, copper ammonia fiber: Burning automatically block the spread of some dark brown charred, burning taste, off-white powder.
Third, the fiber density determination
Textile fiber density was measured in many ways, there are ups and downs, liquid buoyancy method, the proportion method, the gas volumetric method, density gradient tube method to measure fiber density, you can identify the type of fiber, various fiber density density (g/cm3 ) as follows:
Polypropylene 0.91; polyester 1.38-1.39; Spandex 1.0-1.3;
Polyvinyl chloride 1.39-1.40; nylon 1.14-1.15; flax 1.50-1.52;
Acrylic 1.14-1.19; ramie 1.54-1.55; PVA 1.26-1.30;
Viscose 1.52-1.53; wool 1.30-1.32; fiber-rich 1.49-1.52;
Acetate 1.32-1.33; Cotton 1.54-1.55; silk 1.25-1.33;
Glass fiber 2.54. |
|
|
|
|
中文版 | 
English Homepage|Collection
