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Dope for spinning lyocell, method for preparing lyocell filament fiber, and method for preparing lyocell staple fiber using the same

a technology of lyocell and filament fiber, which is applied in the field of lyocell filament fiber and lyocell staple fiber preparation, can solve the problems of easy shrunken and wrinkled rayon fiber, complicated manufacturing process, environmental problems in operation or environmental pollution, etc., and achieves low orientation degree and high elongation

Inactive Publication Date: 2013-04-25
KOLON IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a dope for spinning lyocell that can create fiber with low orientation and fibrillation degrees, high elongation, and can be used for high-end clothing without additional processes. The dope can also be used to make lyocell staple fiber with the same characteristics.

Problems solved by technology

However, the rayon fiber is easily shrunken and wrinkled, the manufacturing process is complicated, and a lot of chemicals are used in the process of dissolving wood pulp, and the like, thus causing environmental problems in operation or environmental pollution in the process of waste water treatment and the like.
However, lyocell fiber has disadvantages in that excessive fibrils are formed on the surface due to high orientation degree and weak binding force between fibrils, and thereby, the fiber surface feel and final product quality are degraded.
In addition, to remove fibril from lyocell, an additional process such as acid cellulose treatment is required, thus rendering the manufacturing process complicated, increasing manufacturing cost, decreasing fabric weight in the process of fibril removal, or degrading fiber properties.

Method used

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  • Dope for spinning lyocell, method for preparing lyocell filament fiber, and method for preparing lyocell staple fiber using the same
  • Dope for spinning lyocell, method for preparing lyocell filament fiber, and method for preparing lyocell staple fiber using the same
  • Dope for spinning lyocell, method for preparing lyocell filament fiber, and method for preparing lyocell staple fiber using the same

Examples

Experimental program
Comparison scheme
Effect test

example

Example 1

Manufacture of Lyocell Filament Fiber from Cotton Linter Pulp

[0069]Cotton linter pulp with a polymerization degree (DP) of 1200 (supplied from Korea Minting and Security Printing Corporation) was introduced into a pulverizer equipped with a 100 mesh filter to prepare pulp powder having a diameter of 1700 μm or less.

[0070]The pulp powder was swollen in a 50 wt % NMMO aqueous solution. The NMMO aqueous solution includes 6 wt % of the pulp, and an antioxidant was added in the content of 0.01 wt % to the cotton linter pulp.

[0071]The swollen pulp slurry was injected into a kneader maintaining an internal temperature of 90° C. and absolute pressure of 50 mmHg with a rotary valve pump at a speed of 16 kg / hour, and completely dissolved while removing extra moisture so that a 50 wt % of NMMO aqueous solution may become a 89 wt % NMMO aqueous solution, and then spinning dope was discharged through a discharge screw.

[0072]The spinning dope was controlled so that total fineness of the ...

example 2

Manufacture of Lyocell Filament Fiber from Cotton Linter Pulp

[0075]Lyocell multifilament yarn was obtained by the same method as Example 1, except using cotton linter pulp of a polymerization degree (DP) of 800.

example 3

Manufacture of Staple Fiber from Cotton Linter Pulp

[0076]Cotton linter pulp (supplied from Korea Minting and Security Printing Corporation) of a polymerization degree (DP) of 1200 was introduced into a pulverizer equipped with a 100 mesh filter to prepare pulp powder having a diameter of 1700 μm or less.

[0077]The pulp powder was swollen in a 50 wt % NMMO aqueous solution. The NMMO aqueous solution included 6 wt % of the pulp, and an antioxidant was added in the content of 0.01 wt % to the cotton linter pulp.

[0078]The swollen pulp slurry was injected into a kneader maintaining an internal temperature of 90° C. and absolute pressure of 50 mmHg with a rotary valve pump at a speed of 16 kg / hour, and completely dissolved while removing extra moisture so that a 50 wt % NMMO aqueous solution may become an 89 wt % NMMO aqueous solution, and then spinning dope was discharged through a discharge screw.

[0079]The spinning dope was controlled so that total fineness of the final filament may beco...

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Abstract

This disclose relates to dope for spinning lyocell including cotton linter pulp and an aqueous solution of N-methylmorpholine-N-oxide (NMMO), a method for manufacturing lyocell filament fiber using the dope, lyocell filament fiber manufactured by the method, a method for manufacturing lyocell staple fiber using the dope, and lyocell staple fiber obtained by the manufacturing method. According to the present invention, fiber that exhibits a low orientation degree and fibrillation degree, and a high elongation, and thus may be applied for fiber for high grade clothing, may be provided without conducting additional processes.

Description

TECHNICAL FIELD[0001]The present invention relates to a dope for spinning lyocell, a method for manufacturing lyocell filament fiber using the dope, and a method for manufacturing lyocell staple fiber using the dope. More particularly, the present invention relates to dope for spinning lyocell, a method for manufacturing lyocell filament fiber using the dope, and a method for manufacturing lyocell staple fiber using the dope, which may provide lyocell fiber that exhibits a low orientation degree and fibrillation degree, and high elongation, and thus may be applied for fiber for high grade clothing without conducting additional processes.BACKGROUND OF THE ART[0002]Fiber refers to a natural or artificial linear object that has flexibility and a thin shape, and has large ratio of length to thickness. The fiber may be divided into long fiber, semi-long fiber, and short fiber in terms of the shape, and natural fiber and artificial fiber in terms of the raw material.[0003]Fiber has been c...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D01D5/26D01D5/22D01H1/14
CPCD01F2/00D01G1/04D04H1/067Y10T428/2909D01D5/26D01H1/14D01D5/22
Inventor KIM, WOO-CHULLEEJEONG, JONG-CHEOLJIN, SANG-WOO
Owner KOLON IND INC
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