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Mixture spinning solution for cellulose acetate nonwoven fabric, preparation method thereof and nonwoven fabric

A technology of cellulose acetate and mixture, which is applied in the direction of spinning solution preparation, cellulose/protein conjugated artificial filament, conjugated synthetic polymer artificial filament, etc., which can solve the problems of poor fluidity, high cost and poor hygroscopicity of acrylic fiber problems such as improving spinnability and fiber strength, reducing raw material costs, and simplifying process operations

Inactive Publication Date: 2017-09-12
JINAN NATURE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the new co-solvent (methyl alcohol caprolactam) used has not been industrialized, and the raw materials are not easy to obtain, and the cost is high
[0005] Chinese patent document CN105002592A discloses "A kind of acetonitrile fiber and its preparation method", by adding cellulose acetate to improve the defects of poor hygroscopicity and easy static electricity of acrylic fiber; at the same time, it improves the disadvantages of low strength and poor wearability of pure acetate fiber
Wet spinning is used, the coagulation bath is the solvent aqueous solution, the fluidity is poor, it is not suitable for other preparation methods, and the fiber is extended 4 to 10 times, which needs to be improved

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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  • Mixture spinning solution for cellulose acetate nonwoven fabric, preparation method thereof and nonwoven fabric
  • Mixture spinning solution for cellulose acetate nonwoven fabric, preparation method thereof and nonwoven fabric
  • Mixture spinning solution for cellulose acetate nonwoven fabric, preparation method thereof and nonwoven fabric

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this embodiment, only cellulose acetate is used as the fiber raw material, and acetone is used as the single solvent.

[0025] (1) By mass ratio (wt%) cellulose acetate: acetone = 30:70.

[0026] (2) Mix the cellulose acetate and acetone weighed in the step (1) at 50° C. and stir evenly to obtain a cellulose acetate mixture spinning solution with a solid content of 10 wt%.

[0027] (3) The cellulose acetate mixture spinning solution prepared in step (2) is directly spun non-woven fabric through the existing melt blown method, but the viscosity of the melt is too high to be extruded.

Embodiment 2

[0029] In this embodiment, cellulose acetate and polyacrylonitrile are used as fiber raw materials, and only acetone is used as a single solvent.

[0030] (1) Take by mass ratio (wt%) cellulose acetate: polyacrylonitrile: the ratio of acetone=14:6:80 weighs cellulose acetate, polyacrylonitrile and acetone respectively, polyacrylonitrile and cellulose acetate in this ratio The mass ratio (wt%) of the sum of the masses of acetone is 20:80, and the mass ratio of cellulose acetate to polyacrylonitrile is 70:30.

[0031] (2) Mix the cellulose acetate, polyacrylonitrile, acetone and dimethylacetamide weighed in step (1) at 30° C. and stir evenly to obtain a cellulose acetate mixture spinning solution with a solid content of 10 wt%.

[0032] (3) The cellulose acetate mixture spinning solution prepared in step (2) is directly spun non-woven fabric through the existing melt-blown method, and the prepared cellulose acetate non-woven fabric has the hygroscopicity and softness and conform...

Embodiment 3

[0034] (1) Weigh cellulose acetate, polyacrylonitrile, acetone and dimethyl acetamide according to the ratio of mass ratio (wt%) cellulose acetate: polyacrylonitrile: acetone: dimethylacetamide=7:3:4.5:85.5 Acetamide, the mass ratio (wt%) of the sum of the mass of polyacrylonitrile and cellulose acetate to the co-solvent (sum of acetone and dimethylacetamide) in this ratio is 10:90, cellulose acetate and polyacrylonitrile The mass ratio of acetone to dimethylacetamide (wt%) is 5:95.

[0035] (2) Mix the cellulose acetate, polyacrylonitrile, acetone and dimethylacetamide weighed in step (1) at 23°C and stir evenly to obtain a cellulose acetate mixture spinning solution with a solid content of 10%. .

[0036] (3) The cellulose acetate mixture spinning solution prepared in step (2) is directly spun non-woven fabric through the existing melt-blown method, and the prepared cellulose acetate non-woven fabric has the hygroscopicity and softness and conformability of cellulose acetat...

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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Abstract

The invention discloses a mixture spinning solution for cellulose acetate nonwoven fabric, a preparation method thereof and the nonwoven fabric. The cellulose acetate mixture spinning solution comprises cellulose acetate, polyacrylonitrile and a solvent, wherein the solvent is a co-solvent of acetone and dimethylacetamide; the preparation method of the cellulose acetate mixture spinning solution comprises the following step of uniformly mixing and stirring the cellulose acetate, the polyacrylonitrile and the solvent; the cellulose acetate nonwoven fabric prepared from the cellulose acetate mixture spinning solution is especially suitable for a production method of the direct-spun non-woven fabric. The cellulose acetate mixture spinning solution is a high-solid content spinning solution with good flowability; the preparation method is simple and practicable; a coagulation bath is not required; the prepared spinning solution greatly improves the spinning property and the fiber strength of the cellulose acetate nonwoven fabric and reduces the cost of raw materials in the preparation process of the direct-spun non-woven fabric; the preparation process is simple to operate; the investment is small, the productivity is high, and the mass production of the industrial direct-spun non-woven fabric is easily achieved; the prepared cellulose acetate nonwoven fabric has the hygroscopicity and the softness of the cellulose acetate.

Description

technical field [0001] The invention relates to a mixture spinning solution for manufacturing cellulose acetate nonwoven fabric and a preparation method thereof, belonging to the technical field of cellulose acetate nonwoven fabric manufacture. Background technique [0002] Regarding the organic solvent system for dissolving cellulose, NMMO (N-methylmorpholine aqueous solution, oxidized methylmorpholine) is a solvent that has truly realized industrial production at present, and the hydrate (NMMO·H2O) of this solvent is most suitable for dissolving fibers white. However, as the concentration of cellulose increases, its viscosity is relatively high and its fluidity is poor and difficult to process. Therefore, the concentration must be controlled within a certain range (less than 12wt%) for industrial use to be processable, thereby limiting the production rate. In addition, this solvent is expensive, and recovery costs. [0003] Cellulose acetate is soluble in acetone, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/013D04H3/007D01D1/02D01F8/02D01F8/08
CPCD04H3/013D01D1/02D01F8/02D01F8/08D04H3/007
Inventor 王克璋
Owner JINAN NATURE NEW MATERIALS