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Sea-island fibre and preparation method thereof

A technology of sea-island fiber and monofilament fineness, which is applied in fiber processing, melt spinning, conjugated synthetic polymer rayon, etc., to achieve the effects of improved economic efficiency, high coloring rate, and increased expansion.

Active Publication Date: 2012-04-18
SUZHOU LONGJIE SPECIAL FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology adopts the blend spinning process, and its disadvantage is that the blending uniformity of the two polymers is poor, and the sea-island fiber will form longitudinal unevenness and excessive or insufficient fiber opening after fiber opening. This kind of PTT sea-island fiber Type short fibers cannot be directly used for weaving; at the same time, PE can only be dissolved by strong acid at high temperature, which is very unfavorable to the environment and personnel safety
[0005] So far, with PTT as the island component and COPET as the sea component, the preparation of superfine PTT long fibers with direct weaving ability has not been reported

Method used

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  • Sea-island fibre and preparation method thereof
  • Sea-island fibre and preparation method thereof
  • Sea-island fibre and preparation method thereof

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Embodiment 1

[0029] This embodiment provides a method for preparing PTT sea-island fibers, which is based on common composite spinning FDY production equipment, with PTT as the island component and COPET as the sea component, to prepare ultra-fine PTT long fibers with direct weaving ability.

[0030] See attached figure 1 , which is a schematic diagram of a process flow for preparing PTT sea-island fibers provided in this embodiment; PTT slices are used as the first raw material. After the raw material is dried by the dryer 14, its moisture content is controlled at less than 20ppm, and the raw material is fed through the slices by its own weight. The pipeline 18 enters the island raw material screw extruder 17, and on the slice feeding pipeline of the feeding port of the screw extruder, a nitrogen inlet device 15 is provided, see the attached figure 2 , which is a structural schematic diagram of the nitrogen input device provided in this embodiment; on the PTT chip feed pipeline 18 ...

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Abstract

The invention discloses a sea-island fibre and a preparation method thereof. A PTT (polytrimethylene terephthalate) slice is taken as an island component, a COPET (copolyester) slice is taken as a sea component, the two raw materials are respectively dried, extruded and molten, then the melts are fed into a spinning box and then are extruded out after being accurately metered by a metering pump, the island component is uniformly distributed into the sea component, the island component and the sea component are sprayed out from a same spinneret orifice, then cooling, moulding, oiling, drawing based on a silk guiding roller, winding and silk doubling are carried out to obtain a PTT sea-island fibre, the breaking strength of the fibre is 2.8-3.7cN / dtex, the breaking elongation is 57-62%, and the evenness uster value is less than 1.3%; and the filament number of the island component PTT is 0.05-0.20DPF. The sea-island fibre product not only has the characteristics of a common sea-island fibre but also has the characteristics of high elasticity, lodging resistance, high dyeing degree, high colour fastness, bright finished product colour, no wrinkling, easy care and memory function, thus the sea-island fibre is an ideal fibre used for a top-grade garment material and has great market potential.

Description

technical field [0001] The invention relates to a synthetic fiber and a spinning process thereof, in particular to a sea-island fiber and a preparation method thereof. Background technique [0002] Sea-island fiber is a kind of composite fiber. After processing and finishing, the thinnest fiber in the world can be obtained. It is an ideal material for producing high-grade clothing fabrics and high-grade decorative fabrics. At present, the sea-island fibers produced generally use full-dull and semi-dull (PET) as the raw material of the island phase, and water-soluble chips (COPET) as the raw material of the marine phase. After drying, extrusion, and melting, they are sent to the spinning box for spinning The metering pump is accurately metered, and then distributed to each spinning component, the island component is evenly distributed in the sea component, and extruded together into the composite component to form a sea-island fiber, which is made into a sea-island POY or a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01D5/30D01D5/08
Inventor 席文杰赵满才关乐葛建军宋少峰
Owner SUZHOU LONGJIE SPECIAL FIBER
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