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Method for preparing three-component self-crimping elastic fiber of PLA (polylactic acid), PTT (polytrimethylene terephthalate) and PBT (poly butylenes terephthalate)

An elastic fiber, self-crimping technology, applied in fiber processing, melt spinning, stretch spinning, etc., can solve the problems of large crimp radius of bicomponent composite fibers, limited number of fiber crimps, and comparable bicomponent composite fibers. , to achieve excellent antibacterial skin-friendly and perspiration, increase the number of fiber curls, excellent elasticity and softness

Inactive Publication Date: 2019-08-13
CHANGSHU GOLD SPRING CHEM FIBERS & KNITTINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the crimp radius of bicomponent composite fibers is still relatively large, the number of fiber crimps within a certain length range is limited
The crimp radius of the three-component composite fiber is significantly smaller than that of the two-component composite fiber, so the number of fiber crimps within a certain length range is significantly higher than that of the two-component composite fiber, and the elasticity and softness cannot make the two-component composite fiber comparable to it.
However, in the process of preparing two-component composite fibers and three-component composite fibers, it is necessary to take into account the compatibility between different fiber raw materials, and the more components, the more prominent the compatibility problem, and the correspondingly more difficult to solve, otherwise it will be affect fiber quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A) Raw material preparation, dry PLA slices, PTT slices and PBT slices separately to obtain PLA (that is, PLA slice dry material, the same below), PTT (that is, PTT slice dry material, the same below) and PBT (that is, PBT slice dry material) , the same below) drying material, wherein, the drying temperature of PLA slices is 110°C, the drying time of PLA slices is 6h, the drying temperature of PTT slices is 120°C, the drying time of PTT slices is 6h, and the drying temperature of PBT slices is 100 ℃, the drying time of the PBT slices is 12h, the volume ratio of the PLA slices, the PTT slices and the PBT slices is 1: 0.8: 0.9, in this step, the PLA slices contain 25wt% furandicarboxylic acid , the PTT slice is composed of propylene glycol, terephthalic acid and furandicarboxylic acid in a molar ratio of 1:0.5:0.05; the PBT slice is massaged by butanediol, terephthalic acid and furandicarboxylic acid The molar ratio is 1:0.5:0.05.

[0021] B) Prepare the spinning melt, p...

Embodiment 2

[0024] A) Raw material preparation, dry PLA slices, PTT slices and PBT slices separately to obtain PLA (that is, PLA slice dry material, the same below), PTT (that is, PTT slice dry material, the same below) and PBT (that is, PBT slice dry material) , the same below) drying material, wherein, the drying temperature of PLA slices is 80°C, the drying time of PLA slices is 12h, the drying temperature of PTT slices is 90°C, the drying time of PTT slices is 12h, and the drying temperature of PBT slices is 115 ℃, the drying time of PBT slices is 9h, and the volume ratio of the PLA slices, PTT slices and PBT slices is 1: 0.1: 1. In this step, the PLA slices contain 15wt% furandicarboxylic acid , the PTT slice is composed of propylene glycol, terephthalic acid and furandicarboxylic acid in a molar ratio of 1:0.05:0.5; the PBT slice is composed of butanediol, terephthalic acid and furandicarboxylic acid The molar ratio of formic acid is 1:0.05:0.5.

[0025] B) Prepare the spinning mel...

Embodiment 3

[0028] A) Raw material preparation, dry PLA slices, PTT slices and PBT slices separately to obtain PLA (that is, PLA slice dry material, the same below), PTT (that is, PTT slice dry material, the same below) and PBT (that is, PBT slice dry material) , the same below) drying material, wherein, the drying temperature of PLA slices is 95°C, the drying time of PLA slices is 9h, the drying temperature of PTT slices is 105°C, the drying time of PTT slices is 9h, and the drying temperature of PBT slices is 130 ℃, the drying time of PBT slices is 6h, the volume ratio of the PLA slices, PTT slices and PBT slices is 1:1:0.8, in this step, the PLA slices contain 20wt% furandicarboxylic acid , the PTT slice is composed of propylene glycol, terephthalic acid and furandicarboxylic acid in a molar ratio of 1:0.25:0.25; the PBT slice is massaged by butanediol, terephthalic acid and furandicarboxylic acid The molar ratio is 1:0.25:0.3.

[0029] B) Prepare the spinning melt, pass the PLA dry m...

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Abstract

The invention discloses a method for preparing three-component self-crimping elastic fiber of PLA (polylactic acid), PTT (polytrimethylene terephthalate) and PBT (poly butylenes terephthalate) and belongs to the field of composite fiber preparation. The method includes the steps of respectively drying PLA slices, PTT slices and PBT slices; subjecting PLA dry material, PTT dry material and PBT drymaterial to melt extrusion through first, second and third screws respectively and transporting the material to respective metering pumps for metering; leading a PLA spinning melt serving as the firstcomponent, a PTT spinning melt serving as the second component and a PBT spinning melt serving as the third component to a composite spinning module of a spinning box, allowing the spinning melts toreach a spinneret plate through respective melt flow channels to composite fiber after extruded from spinneret holes, and then sequentially performing blowing cooling, oiling, pre-meshing, stretching,re-meshing and winding into a tube to obtain the finished product. With the method, forking, broken filament and broken ends cannot occur; the number of fiber crimps is increased, and excellent elasticity and softness are displayed; good degradability, excellent bacteriostatic, skin affinity and perspiration are achieved.

Description

technical field [0001] The invention belongs to the technical field of composite fiber preparation, and in particular relates to a preparation method of PLA, PTT and PBT three-component self-crimping elastic fiber. Background technique [0002] Two-component chemical fibers such as side-by-side polyester and nylon two-component fibers have been produced in my country for many years, and there are basically no technical obstacles and can be seen in open Chinese patent documents, such as CN101109110A (a kind of eccentric two-component composite fiber) fiber and its preparation method), using PPS and PET, PBT and PA6 or PBT and PA66; CN101798714B (two-component composite fiber and its preparation method), using PET and PA; CN104195673B (two-component polyester composite fiber direct spinning silk method and system), using bicomponent PET. [0003] Because the aforementioned two-component chemical fiber has good three-dimensional crimping properties, it has been widely used in th...

Claims

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Application Information

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IPC IPC(8): D01D5/08D01D5/28D01D1/00D01D5/088D01D5/096D02J1/08D01D5/12D01F8/14
CPCD01D1/00D01D5/08D01D5/088D01D5/096D01D5/12D01D5/28D01F8/14D02J1/08
Inventor 李文俊樊海彬王宁王维平
Owner CHANGSHU GOLD SPRING CHEM FIBERS & KNITTINGS