Double-component orange slice type compound fibers and preparation method thereof

A segmented orange-shaped, composite fiber technology, applied in fiber processing, fiber chemical characteristics, melt spinning, etc., can solve the problems of long natural degradation time, limit the application of chemical degradation and recycling, and achieve the increase of free volume of voids, specific The effect of increasing the surface area and increasing the free volume of space

Active Publication Date: 2019-05-10
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the compact structure and high crystallinity of PBT, the natural degradation time is very long (the degradation cycle of conventional polyester fibers can reach 16-48 years), which greatly limits the application of chemical degradation and recycling in the field of PBT waste treatment. In addition, composite In addition to PBT, the fiber also contains nylon, and the optimal degradation (recycling) conditions of the two are different, which further limits the application of chemical degradation and recycling in the field of PBT / nylon composite fiber processing

Method used

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  • Double-component orange slice type compound fibers and preparation method thereof
  • Double-component orange slice type compound fibers and preparation method thereof
  • Double-component orange slice type compound fibers and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] A kind of preparation method of two-component segmented orange type composite fiber, its specific steps are as follows:

[0073] (1) prepare modified polyester;

[0074] (1.1) Preparation of doped modified Bi 2 o 3 Powder;

[0075] (1.1.1) The concentration of 2.5wt% Ca(NO 3 ) 2 Aqueous solution with concentration of 22wt% Bi 2 o 3 The solution is mixed evenly, Bi 2 o 3 The solvent of the solution is nitric acid, the Ca in the mixture 2+ with Bi 3+ The mol ratio is 7:100;

[0076] (1.1.2) Add dropwise ammonia water with a concentration of 2 mol / L until the pH value of the mixed solution is 10 to obtain a precipitated product, wash and dry the precipitated product at a temperature of 105°C for 2.5 hours;

[0077] (1.1.3) Heat the dried product to 400°C and keep it warm for 2.5h, then heat it up to 700°C and keep it warm for 1.5h, and finally cool it in air and pulverize it to obtain doped modified Bi with an average particle size of 0.45 microns 2 o 3 Powder...

Embodiment 2

[0101] A kind of preparation method of two-component segmented orange type composite fiber, its specific steps are as follows:

[0102] (1) prepare modified polyester;

[0103] (1.1) Preparation of 3-trimethylsilyl-3-methyl-1,2-propanediol;

[0104] (1.1) Mix 3-trimethylsilyl-3-methylpropene, peracetic acid and dichloromethane at a molar ratio of 1:5:10, and react at a temperature of 35°C for 5 hours with stirring during the reaction. After the end, the solvent is removed, and trimethylsilylpropylene epoxide is obtained through purification and refining;

[0105] (1.2) Mix water, concentrated sulfuric acid and trimethylsilyl propylene epoxide, heat it in a water bath to 80°C under stirring conditions, keep it warm for 10 minutes, cool to room temperature after the reaction, and obtain such as 3-trimethylsilyl-3-methyl-1,2-propanediol shown in formula (I), R in formula (I) is -CH(CH 3 )-, concentrated sulfuric acid is the sulfuric acid that mass concentration is 70%, when re...

Embodiment 3

[0119] A kind of preparation method of two-component segmented orange type composite fiber, its specific steps are as follows:

[0120] (1) prepare modified polyester;

[0121] (1.1) Preparation of 3-trimethylsilyl-3-methyl-1,2-propanediol;

[0122] (1.1.1) Mix 3-trimethylsilyl-3-methylpropene, peracetic acid and dichloromethane at a molar ratio of 1:10:15, and react at a temperature of 40°C for 8 hours with stirring , the solvent is removed after the reaction, and trimethylsilylpropylene epoxide is obtained through purification and refinement;

[0123] (1.1.2) Mix water, concentrated sulfuric acid and trimethylsilyl propylene epoxide, heat it in a water bath to 85°C under stirring conditions, keep it warm for 15 minutes, cool to room temperature after the reaction, neutralize, distill, separate and purify Obtain 3-trimethylsilyl-3-methyl-1,2-propanediol as shown in formula (I), R in formula (I) is-CH(CH 3 )-, concentrated sulfuric acid is the sulfuric acid that mass concen...

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Abstract

The invention relates to double-component orange slice type compound fibers and a preparation method thereof. The preparation method comprises the following steps: first, uniformly mixing terephthalicacid, 1,4-butanediol, dihydric alcohol with a tertiary butyl side group, binary acid with a tertiary butyl side group and doped and modified Bi2O3 powder, and successively carrying out esterificationreaction and polycondensation to prepare modified polyester; and carrying out metering, extruding in a same yarn spray hole in an orange slice type yarn spray plate, cooling, oiling, stretching, thermal setting and coiling on a modified polyester melt and a chinlon melt by means of a compound spinning method to prepare the double-component orange slice type compound fibers, wherein the doped andmodified Bi2O3 powder is dispersed in chinlon. The intrinsic viscosity of the product placed for 60 months at a temperature of 25 DEG C and relatively humidity of 65% is reduced by 16-21%. The intrinsic viscosity of the modified polyester is reduced by 14-19%. The preparation method is simple in process and low in cost. The prepared product is high in natural degrading rate and good in applicationprospect.

Description

technical field [0001] The invention belongs to the technical field of modified fibers, and relates to a two-component segmented-pie composite fiber and a preparation method thereof, in particular to a method for preparing a segmented-pie bi-component composite fiber by modifying PBT. Background technique [0002] Material compounding is one of the development trends of material science in the 21st century, and textile materials are no exception. Compounding is to combine two or more materials with different properties and forms, so it can integrate the strengths of many families and endow fibers with new functions, such as blending, interweaving, coating, etc. of various fibers. The compounding of multiple materials in a single filament is a current research hotspot. [0003] Composite fibers are an important category of differentiated fibers, which are obtained by splitting two or more polymer melts with a special distribution plate, and then extruding them in the same sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/12D01F8/14D01F1/10C08G63/695C08G63/78D01D5/08D01D5/253D01D5/36
Inventor 王山水汤方明陈锋
Owner JIANGSU HENGLI CHEM FIBER
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