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what is the difference of synthetic filament

Polyester Filament is made of polyester filament. Polyester is an important variety of synthetic fibers, and is the trade name of polyester fibers in my country. It is a fiber-forming polymer prepared from purified terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (MEG) through esterification or transesterification and polycondensation. - Polyethylene terephthalate (PET), fibers made by spinning and post-processing.


Dtex (dtex), referred to as decitex, the symbol is dtex, refers to the weight of 10,000 meters long fiber or yarn under the specified moisture regain, dtex=dg/(L*100000), dtex=g/( L*10000), where dg is the weight of the yarn (or silk) in grams, 1 decigram = 0.1 grams, that is, 1dg=0.1g), and L is the length of the yarn (or silk) (m)


Monofilament: Its fineness is thicker than that of a single filament in a multifilament. The melted synthetic resin is condensed through a thin stream of raw liquid pressed out of the capillary hole of the spinneret. Or spin with a multi-hole spinneret (for example, up to 50 holes), and then wind it into a monofilament bobbin through untwisted drawing and splitting.


Multifilament: It is a twisted or untwisted bundle of filaments spun from a multi-hole spinneret. Multifilaments composed of multiple single fibers are softer than monofilaments of the same denier.


Single yarn: It is a very simple thread.


Multi-plied yarn: The strands are plied and twisted in a certain way to obtain multi-twisted strands, such as double-strand, triple-strand and multi-strand. Mainly used for sewing thread, braided thread or medium-thick and strong fabrics.


Industrial brush filament and Paint brush filament belong to Multifilament.