Unlock instant, AI-driven research and patent intelligence for your innovation.

Flash non-woven fabric and preparation method thereof

A non-woven fabric and flash evaporation technology, applied in the field of non-woven fabrics, can solve the problems of difficult flow of solid adsorbent, high production cost, complicated production process, etc., and achieve thermal stability and chemical stability, low loss rate, and process The effect of easy operation

Active Publication Date: 2022-06-28
JIANGSU QINGYUN NEW MATERIAL TECH CO LTD
View PDF18 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This invention uses activated carbon adsorption to treat tail gas, but because the solid adsorbent is difficult to flow, it is necessary to switch between different equipment to perform adsorption and desorption, resulting in a more complicated production process and higher production costs

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Flash non-woven fabric and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The present embodiment provides a method for preparing a flash non-woven fabric, which combines figure 1 shown, including the following steps:

[0035] Step 1: prepare a spinning solution, add a solvent to the reactor, add a polymer into the solvent, and dissolve to obtain a spinning solution, wherein the mass fraction of the polymer in the spinning solution is 10%, and the solvent is trichlorofluoromethane ;

[0036] Step 2: spinning, spinning the spinning solution obtained in step 1 by flash evaporation to obtain flashed fibers, and hot-pressing to obtain flashed non-woven fabrics;

[0037] Step 3: Tail gas treatment, the solvent vapor generated by solvent evaporation in step 2 is transported to the lower section of the adsorption tower 1 through a fan, and the mass fraction of the solvent vapor is 6.465g / m after sampling and testing. 3 , the liquid adsorbent used to adsorb the solvent vapor is sprayed by the upper section of the adsorption tower 1 and mixed with th...

Embodiment 2

[0043] The present embodiment provides a method for preparing a flash non-woven fabric, which combinesfigure 1 shown, including the following steps:

[0044] Step 1: prepare a spinning solution, add a solvent to the reaction kettle, add a polymer into the solvent, and dissolve the spinning solution to obtain a spinning solution, wherein the mass fraction of the polymer in the spinning solution is 20%, and the solvent is 1,1- Dichloro-2,2,2-trifluoroethane;

[0045] Step 2: spinning, spinning the spinning solution obtained in step 1 by flash evaporation to obtain flashed fibers, and hot-pressing to obtain flashed non-woven fabrics;

[0046] Step 3: Tail gas treatment, the solvent vapor generated by solvent evaporation in step 2 is transported to the lower section of the adsorption tower 1 through a fan, and the mass fraction of the solvent vapor is 6.465g / m after sampling and testing. 3 , the liquid adsorbent for adsorbing solvent vapor is sprayed from the upper section of ads...

Embodiment 3

[0052] The present embodiment provides a method for preparing a flash non-woven fabric, which combines figure 1 shown, including the following steps:

[0053] Step 1: prepare a spinning solution, add a solvent to the reactor, and then add a polymer into the solvent to dissolve the spinning solution, wherein the mass fraction of the polymer in the spinning solution is 15%, and the solvent is 1,1- Dichloro-2,2-difluoroethane;

[0054] Step 2: spinning, spinning the spinning solution obtained in step 1 by flash evaporation to obtain flashed fibers, and hot-pressing to obtain flashed non-woven fabrics;

[0055] Step 3: Tail gas treatment, the solvent vapor generated by solvent evaporation in step 2 is transported to the lower section of the adsorption tower 1 through a fan, and the mass fraction of the solvent vapor is 6.465g / m after sampling and testing. 3 , the liquid adsorbent for adsorbing solvent vapor is sprayed by the upper section of adsorption tower 1 and mixed with sol...

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
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of nonwoven fabrics, in particular to a flash nonwoven fabric and a preparation method thereof. The present invention aims at the problem that the solid adsorbent in the prior art is difficult to flow, so it is necessary to switch between different equipment to implement adsorption and desorption, and provides a flash non-woven fabric and a preparation method thereof, including preparation of spinning solution, spinning and Tail gas treatment step, tail gas treatment includes transporting the solvent vapor generated by solvent evaporation to the lower section of the adsorption tower through the fan, and the liquid adsorbent used to absorb the solvent vapor is sprayed from the upper section of the adsorption tower and mixed with the solvent vapor in the adsorption tower. After completion, the liquid is discharged from the bottom of the adsorption tower, and the gas is discharged from the top of the adsorption tower. The invention realizes the adsorption of the solvent vapor in the tail gas by reverse convection between the liquid adsorbent and the tail gas to be absorbed. Compared with the method of using a solid adsorbent in the prior art, the whole process operation is simpler and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of non-woven fabrics, and in particular relates to a flash evaporation non-woven fabric and a preparation method thereof. Background technique [0002] Flash spinning, also known as flash spinning, flash spinning or flash spinning, instantaneous solvent volatilization into a web, uses dry spinning instead of melt spinning. That is, the high polymer is dissolved in a certain solvent to make a spinning solution, and then sprayed from the spinneret hole, and the high polymer is re-solidified into fibers due to the rapid volatilization of the solvent. The dry spinning technology used in the flash evaporation method is different from the ordinary dry spinning, which is mainly reflected in the low viscosity of the spinning solution used in the flash evaporation process, and the high pressure and speed are sprayed from the spinneret hole. out. Due to the low viscosity and good fluidity of the solution, the liquid...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): D04H3/007D04H3/009D04H3/011D04H3/10D01D5/11B01D53/14
CPCD04H3/007D04H3/009D04H3/011D04H3/10D01D5/11B01D53/1493B01D53/1425B01D2252/205B01D2252/60
Inventor 叶孔萌
Owner JIANGSU QINGYUN NEW MATERIAL TECH CO LTD