How to identify various non-woven materials (on)?

Categories:Industry news
Time of issue:2019-06-25

How to identify various non-woven materials (on)?

(Summary description)1.Hand-feelingvisualmethod:Thismethodisapplicabletonon-wovenfabricrawmaterialsinthestateofloosefibers.(1)Cottonfiberisshorterandthinnerthanramiefiberandotherhempprocessfibersandwoolfibers,oftenwithvariousimpuritiesanddefects.(2)Hempfiberfeelsrougher.(3)Thewoolfiberiscurlyandelastic.(4)Silkisfilament,longandslender,withaspecialluster.(5)Amongthechemicalfibers,onlytheviscosefiberhasalargedifferenceinstrengthbetweenthedryandwetstates.(6),spandexhasaverylargeelasticity,itslengthcanbestretchedmorethanfivetimesatroomtemperature.2.Microscopicobservationmethod:Thenon-wovenfabricfiberisidentifiedaccordingtothelongitudinalandcross-sectionalcharacteristicsofthefiber.(1),cottonfiber:cross-sectionalshape:waistround,withamiddlewaist;verticalshape:flatribbon,withnaturalrotation.(2),hemp(ramie,flax,jute)fiber:cross-sectionalshape:waistroundorpolygonal,withamiddlecavity;verticalsurfaceshape:therearehorizontalsections,verticallines.(3),woolfiber:cross-sectionalshape:roundornearlyround,somehaveapulp;verticalform:thesurfacehasscales.(4),rabbithairfiber:cross-sectionalshape:dumbbelltype,withpulp;verticalform:surfacehasscales.(5),mulberrysilkfiber:cross-sectionalshape:irregulartriangle;verticalsurfaceshape:smoothandstraight,longitudinalstripes.(6),ordinaryviscose:cross-sectionalshape:zigzag,sheathcorestructure;verticalshape:longitudinalgrooves.(7),richandstrongfiber:cross-sectionalshape:lesstoothshape,orround,oval;verticalform:smoothsurface.(8),acetatefiber:cross-sectionalmorphology:trilobalorirregularzigzag;longitudinalmorphology:thesurfacehasverticalstripes.(9)Acrylicfiber:cross-sectionalshape:round,dumbbell-shapedorleaf-like;longitudinalshape:smoothorstreakedsurface.(10),polyvinylchloridefiber:cross-sectionalshape:closetoacircle;verticalform:smoothsurface.(11),spandexfiber:cross-sectionalshape:irregularshape,round,potato-shaped;verticalsurfaceshape:darkdarksurface,unclearbone-shapedstripes.(12),polyester,nylon,polypropylenefiber:cross-sectionalshape:roundorshaped;verticalform:smooth.(13),vinylonfiber:cross-sectionalshape:waistround,sheathcorestructure;verticalsurfaceshape:1~2grooves.

Categories:Industry news
Time of issue:2019-06-25

Information

1. Hand-feeling visual method: This method is applicable to non-woven fabric raw materials in the state of loose fibers.

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

(2) Hemp fiber feels rougher.

(3) The wool fiber is curly and elastic.

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

(5) Among the chemical fibers, only the viscose fiber has a large difference in strength between the dry and wet states.

(6), spandex has a very large elasticity, its length can be stretched more than five times at room temperature.

2. Microscopic observation method: The non-woven fabric fiber is identified according to the longitudinal and cross-sectional characteristics of the fiber.

(1), cotton fiber: cross-sectional shape: waist round, with a middle waist; vertical shape: flat ribbon, with natural rotation.

(2), hemp (ramie, flax, jute) fiber: cross-sectional shape: waist round or polygonal, with a middle cavity; vertical surface shape: there are horizontal sections, vertical lines.

(3), wool fiber: cross-sectional shape: round or nearly round, some have a pulp; vertical form: the surface has scales.

(4), rabbit hair fiber: cross-sectional shape: dumbbell type, with pulp; vertical form: surface has scales.

(5), mulberry silk fiber: cross-sectional shape: irregular triangle; vertical surface shape: smooth and straight, longitudinal stripes.

(6), ordinary viscose: cross-sectional shape: zigzag, sheath core structure; vertical shape: longitudinal grooves.

(7), rich and strong fiber: cross-sectional shape: less tooth shape, or round, oval; vertical form: smooth surface.

(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.

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