Co-polyester melt direct spun differential shrinkage composite fiber and method for preparing same

Abstract

The invention relates to a co-polyester melt directly-spun differential shrinkage composite fiber and a method for preparing the co-polyester melt directly-spun and differential shrinkage composite fiber. Monomers of five components including erephthalic acid, ethylene glycol, polyethylene glycol, diethylene glycol and pentaerythritol are copolymerized to obtain a co-polyester melt, the co-polyester melt is then conveyed to a spinning box body through a melt pipeline and a booster pump, squeezed out through two metering pumps, a spinning assembly and two spinneret plates and cooled and solidified to form two bundles of yarn, after oil is applied to one bundle of yarn through an oil wheel, pre-interlacing is conducted on the bundle of yarn and hot stretching is conducted on the bundle of yarn through a first draw roll and after oil is applied to the other bundle of pre-oriented yarn to be formed through an oil spraying nozzle, the two bundles of yarn is simultaneously drawn to a second draw roll so that holt shaping can be conducted and is then coiled and formed through a main interlacer and a coiling device, and the co-polyester melt directly-spun and differential shrinkage composite fiber is prepared. Due to the fact that existing FDY production equipment is improved, the obtained fiber has a good superfine three-dimensional morphological structure and different potential differential shrinkage properties, is easy to dye, has a leveling dying property, and is multifunctional, good in quality and high in additional value.

Description

Technical field [0001] The invention relates to a copolyester melt direct spinning heterogeneous shrinkage composite fiber and a preparation method thereof, and belongs to the technical field of chemical fibers. Background technique [0002] The five-component copolymer melt direct-spun heterogeneous shrinkage composite fiber used in the present invention has fine three-dimensional morphological structure formed by a special fiber group, different potential heterogeneous shrinkage, easy dyeing and leveling, and high color uniformity effect, etc., thereby making up for Compared with the polyester hetero-shrinkage composite fiber and technology prepared on the domestic and foreign markets, it has the short production process, no waste discharge, low production cost, high efficiency, good product quality and cost-effective. Features with obvious advantages. [0003] At present, the polyester heterogeneous shrinkage composite fiber and its products on the domestic and foreign markets ...

AI Technical Summary

Problems solved by technology

The second is that it is also possible to polymerize terephthalic acid and ethylene glycol as raw materials to obtain polyester melt direct spinning to produce different shrinkage composite fibers. The Chinese invention patent with the publication number CN102747474A discloses a different shrinkage composite fiber and its The processing method, the process steps are in turn esterification reaction of raw materials purified terephthalic acid and ethylene glycol, preparation of polyester melt, melt transportation, simultaneous spinning of pre-oriented yarn and full-drawn yarn, oiling, full-drawing Drawing pre-network, full-drawing yarn drawing setting, network compounding and winding, the production specification is 47dtex / 48f different shrinkage composite fiber, but the composite uniformity effect of the polyester different shrinkage composite fiber product made by this preparation method Poor, poor dyeing rate and uneven dyeing, white spots on the surface of the fabric, poor moisture absorption, breathability and moisture retention, easy to generate static electricity, single product function, unstable product quality

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