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High water absorption polyvinyl alcohol fibre and preparation thereof

A technology of polyvinyl alcohol fiber and polyvinyl alcohol, applied in the direction of fiber chemical characteristics, single-component synthetic polymer rayon, dry spinning method, etc., can solve the problems of low physical and mechanical properties of fibers and complicated production process, and achieve It is not easy to absorb moisture and agglomerate, the production process is simple, and the effect of increasing fluidity and silkiness

Inactive Publication Date: 2008-09-10
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production process of the above method is relatively complicated, and the physical and mechanical properties of the fiber are not high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Polyvinyl alcohol with a degree of polymerization of 1700 and a degree of alcoholysis of 88% is selected: OP-10 is used as a flow accelerator; ethylene glycol diglycidyl ether is used as a crosslinking agent;

[0025] Mix polyvinyl alcohol, cross-linking agent and flow accelerator in a weight ratio of 99:0.05:1.0, dissolve in water to make a spinning solution, make the fiber composition content in the solution 20%, and control the temperature at 90°C; The spinning slurry is extruded from the spinneret by the metering pump, the hole diameter of the spinneret used is 0.1 mm, and the number of holes is 24 holes; the fibers are dried in the hot air channel (at a temperature of 190° C.) under the spinneret to obtain Polyvinyl alcohol fibers containing a crosslinking agent; heat-treating the obtained fibers at a temperature of 160° C. for 2 minutes to obtain water-absorbable crosslinked polyvinyl alcohol fibers.

[0026] The fineness of the obtained superabsorbent polyvinyl a...

Embodiment 2

[0028] Polyvinyl alcohol with a degree of polymerization of 1500 and a degree of alcoholysis of 92% is selected: TX-12 is used as a flow accelerator; glycerol diglycidyl ether is used as a crosslinking agent;

[0029] Mix polyvinyl alcohol, cross-linking agent and flow promoter in a weight ratio of 99.5:0.05:0.5, dissolve in water to make a spinning solution, make the fiber composition content in the solution 35%, and control the temperature at 95°C; The spinning slurry is extruded from the spinneret by the metering pump, the hole diameter of the spinneret used is 0.3 mm, and the number of holes is 16 holes; the fibers are dried in the hot air passage (at a temperature of 190° C.) under the spinneret to obtain Polyvinyl alcohol fibers containing a crosslinking agent; heat-treating the obtained fibers at a temperature of 160° C. for 5 minutes to obtain water-absorbable crosslinked polyvinyl alcohol fibers.

[0030] The fineness of the obtained superabsorbent polyvinyl alcohol i...

Embodiment 3

[0032] Polyvinyl alcohol with a degree of polymerization of 2000 and a degree of alcoholysis of 75% is selected for use: citric acid is a crosslinking agent;

[0033] Mix polyvinyl alcohol and crosslinking agent at a weight ratio of 99.5:0.03, dissolve in water to make a spinning solution, make the fiber composition content in the solution 35%, control the temperature at 99°C; The material is extruded in the spinneret, the hole diameter of the spinneret used is 0.2mm, and the number of holes is 10 holes; the fiber is dried in the hot air channel (the temperature is 200°C) under the spinneret to obtain the polyethylene containing crosslinking agent. Alcohol fibers; heat-treating the obtained fibers at a temperature of 120° C. for 10 minutes to obtain water-absorbable cross-linked polyvinyl alcohol fibers.

[0034] The fineness of the obtained superabsorbent polyvinyl alcohol is 3.24dtex, the absorption rate of deionized water is 160 times, and the absorption rate of physiologic...

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Abstract

The invention relates to a high hydroscopic polyvinyl alcohol fiber and a preparation thereof. The compositions of the high hydroscopic polyvinyl alcohol fiber are respectively polyvinyl alcohol, crosslinking agent and flow promoter with the weight percent of 90-99.5 to 0.01-0.05 to 0-2; the preparation comprises the following steps of: (1) using room temperature water-soluble polyvinyl alcohol with the crosslinking agent and the flow promoter inside to prepare spinning solution with the weight percentage concentration between 20 and 40 percent; (2) acquiring fiber containing the crosslinking agent via the technology of dry spinning when the temperature of the spinning solution is at 80 to 100 DEG C, and acquiring the high hydroscopic polyvinyl alcohol fiber via the heat treatment for 2 to 10 minutes at 120 to 160 DEG C. The product of the invention is not easy to absorb moisture and be caked when stored in the air, is easy for storing, has high water absorbing capacity, enables the absorption ratio for deionized water over 160 times and the absorption ratio for physiological saline over 45 times, and has easily obtained materials and simple processing technique.

Description

technical field [0001] The invention relates to the field of fiber materials and its preparation, in particular to a superabsorbent polyvinyl alcohol fiber and its preparation. Background technique [0002] Superabsorbent fiber is a special functional fiber developed after superabsorbent resin. Like superabsorbent resin, it can absorb physiological saline or deionized water dozens of times its own weight. The water can be kept inside the fiber without being squeezed come out. Superabsorbent fiber not only has the functions of water absorption and water retention of superabsorbent resin, but also has a large surface area because the diameter of the fiber is about 30 μm, so the water absorption speed is faster than that of resin. At present, the industrial methods for preparing superabsorbent fibers at home and abroad are mainly divided into three types: one is to chemically post-treat polyacrylonitrile fibers; The silk stock solution is prepared by dry spinning and thermal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/50D01D5/04
Inventor 靳向煜章倩王富军吴海波殷保璞章悦庭陈涵胡炜汪小颖屠晓东
Owner DONGHUA UNIV
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