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Superabsorbent yarn and method for manufacturing the same

a superabsorbent yarn and superabsorbent technology, applied in the direction of yarn, transportation and packaging, synthetic resin layered products, etc., can solve the problems of inability to prepare satisfactory absorbent yarn, significant disadvantage of the method, and the need for additional equipment and costs to treat such hazardous materials, so as to achieve satisfactory absorbency and reduce the degradation of strength and elongation of the yarn. , the effect of high flexibility

Inactive Publication Date: 2014-06-19
KOLON IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a superabsorbent material that can be added to yarn in a way that ensures the yarn can absorb liquids effectively without causing environmental issues. This material is also heat-treated at low temperatures to minimize any negative effects on the strength and elongation of the yarn. Additionally, the superabsorbent material is highly flexible, which reduces the likelihood of the polymer layer breaking into powders when used in optical cables, making the manufacturing process easier and reducing defects.

Problems solved by technology

According to this method, however, a yarn of satisfactory absorbency cannot be prepared because the impregnation of the yarn with the superabsorbent material is inhibited by the macromolecular structure thereof.
This method, however, has significant disadvantage, too.
Materials causing environmental problem, such as isohexadecane, are produced during the drying process, which requires additional equipments and costs to treat such hazardous materials.
However, the heat-treatment at high temperature for a long time causes the yarn to be damaged, thereby degrading the strength and elongation of the yarn.
The degradation of the strength and elongation is a fatal flaw of the yarn which is supposed to be used as a reinforcing member for an optical cable.
Furthermore, the methods have disadvantages from the economic viewpoint since the heat-treatment at high temperature for a long time lowers the productivity and requires significant energy consumption.
Further, since the conventional superabsorbent material has brittleness, when the superabsorbent yarn passes through a guide during an optical cable manufacturing process, the polymer layer coated on the yarn is fractured to generate white powders.
The white powders generated during the optical cable manufacturing process may cause defective products.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0045]Polyurethane precursor was prepared by mixing polyethylene glycol and 1,8-octanediisocianate at the molar ratio of 3:4 and heating it at about 80° C. The viscosity of the polyurethane precursor was decreased by adding dibutyltin dilaurate and acetone to the polyurethane precursor so that the proportion of the solid components thereof becomes 30%. Then, polyurethane precursor dispersion was prepared by adding distilled water to the polyurethane precursor while stirring it at 1,000 rpm. Diethylenetriamine aqueous solution was added thereto to produce a mixture, and the mixture was stirred at about 60° C. for 2 hours to complete the polyurethane dispersion. Then, coating solution was prepared by adding methylenebisacrylamide to the polyurethane dispersion.

[0046]A yarn including continuous aramid multifilaments was dipped into the coating solution thus obtained to impregnate the yarn with the coating solution.

[0047]Subsequently, the coating solution-impregnated yarn was heat-treat...

example 2

[0048]A coating solution was prepared by adding acrylamide, methylenebisacrylamide, and potassium persulfate to a polyurethane dispersion made in the same manner as that of the Example 1.

[0049]A yarn including continuous aramid multifilaments was impregnated with the coating solution by dipping the yarn into the coating solution, and then the coating solution-impregnated multifilaments were heat treated at about 70° C. for 3 hours so that a superabsorbent material having a network structure formed through the crosslinking of the polyurethane with polyacrylamide could be formed on the yarn. The yarn was heated at about 120° C. to remove any remaining moisture therefrom to complete a superabsorbent material-coated yarn.

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Abstract

Disclosed are to a superabsorbent yarn capable of minimizing the degradation of strength and elongation thereof after coated with a superabsorbent material and minimizing white powders which might be caused and impose processing difficulties during an optical cable manufacturing process and a method for manufacturing the same. The superabsorbent yarn of the invention comprises a yarn and a superabsorbent material coated on the yarn, wherein the superabsorbent material comprises crosslinked polyurethane.

Description

TECHNICAL FIELD[0001]The present invention relates to a superabsorbent yarn and a method for manufacturing the same, and more particularly, to a superabsorbent yarn capable of minimizing the degradation of strength and elongation thereof after coated with a superabsorbent material and minimizing white powders which might be caused and impose processing difficulties during an optical cable manufacturing process and a method for manufacturing the same.BACKGROUND ART[0002]A superabsorbent yarn can be used as a reinforcing member and an water blocking member for an optical cable.[0003]Among the methods for manufacturing a superabsorbent yarn is a method comprising impregnating a yarn with an water-insoluble superabsorbent material dispersed in water, and then drying it. According to this method, however, a yarn of satisfactory absorbency cannot be prepared because the impregnation of the yarn with the superabsorbent material is inhibited by the macromolecular structure thereof.[0004]A m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D06M15/564
CPCD06M15/564D06M15/263D06M2101/36Y10T428/2969Y10T428/2967D06M13/348D06M13/395
Inventor HAN, IN SIKLEE, HYO JINROH, KYEOUNG HWANLEE, BUM HOON
Owner KOLON IND INC