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Polyethylene sheet material

A polyethylene and sheet technology, applied in the direction of one-component polyolefin rayon, one-component synthetic polymer rayon, separation method, etc., can solve the problem that the solvent cannot be recycled and reused, the solid adsorbent is difficult to flow, and the adsorbent Problems such as low adsorption capacity, to achieve the effect of providing thermal stability and chemical stability, high solubility, and good thermal stability

Pending Publication Date: 2021-08-17
JIANGSU QINGYUN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of the solid properties of the adsorbent, the recovery process is basically: low-temperature adsorption and high-temperature desorption. The disadvantages of the above-mentioned processes are: (1) The solid adsorbent is difficult to flow, so different equipment needs to be switched to implement adsorption and desorption. Attached; (2) The adsorption capacity of the adsorbent is low, so a large amount of adsorbent is required, resulting in huge adsorption equipment
(3) At the same time, the solvent after adsorption cannot be recovered for reuse

Method used

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  • Polyethylene sheet material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A processing method of polyethylene sheet material, comprising the following steps:

[0048] (1) Prepare a spinning solution, add a solvent to the reaction kettle, then add the polymer into the solvent, and dissolve to obtain a spinning solution;

[0049] The polymer is polyethylene particles;

[0050] The solvents are 1,1-dichloro-2,2,2-trifluoroethane and 1,1,2,2,3,3,4,4-octafluorobutane; the volume ratio of the two is 7:3 ;

[0051] (2) spinning, with the spinning solution obtained in step 1, spinning by flash method to obtain polyethylene flash fiber; obtain polyethylene sheet material by hot pressing;

[0052] (3) tail gas adsorption, the tail gas produced in step (2) is transported to the lower section of the adsorption tower by the blower fan, and the mass fraction of the solvent vapor in the tail gas is 6.132g / m by sampling 3 , the polyethylene glycol diethyl ether used to adsorb solvent vapor is sprayed from the upper section of the adsorption tower and mixe...

Embodiment 2

[0062] A kind of processing method of polyethylene sheet material, the process of step (1), (2), (4), (5), (6), (7) is the same as embodiment 1;

[0063] There is only a difference: in step (3),

[0064] (3) tail gas adsorption, the tail gas produced in step (2) is transported to the lower section of the adsorption tower by the blower fan, and the mass fraction of the solvent vapor in the tail gas is 6.132g / m by sampling 3 , the polyethylene glycol diethyl ether used to adsorb solvent vapor is sprayed from the upper section of the adsorption tower and mixed with the solvent vapor in the adsorption tower. After the adsorption is completed, the liquid is discharged from the bottom of the adsorption tower, and the gas is discharged from the top of the adsorption tower; sampling The mass fraction of solvent vapor in the exhaust gas is detected to be 55mg / m 3 ;

[0065] In the spinning solution, the mass fraction of the polymer is 15%.

[0066] The residence time of the solvent ...

Embodiment 3

[0070] A kind of processing method of polyethylene sheet material, the process of step (1), (2), (4), (5), (6), (7) is the same as embodiment 1;

[0071] There is only a difference: in step (3),

[0072] (3) tail gas adsorption, the tail gas produced in step (2) is transported to the lower section of the adsorption tower by the blower fan, and the mass fraction of the solvent vapor in the tail gas is 6.132g / m by sampling 3 , the polyethylene glycol diethyl ether used to adsorb solvent vapor is sprayed from the upper section of the adsorption tower and mixed with the solvent vapor in the adsorption tower. After the adsorption is completed, the liquid is discharged from the bottom of the adsorption tower, and the gas is discharged from the top of the adsorption tower; sampling The mass fraction of solvent vapor detected in the exhaust gas is 49mg / m 3 ;

[0073] In the spinning solution, the mass fraction of the polymer is 15%.

[0074] The residence time of the solvent vapor ...

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Abstract

The invention relates to a polyethylene sheet material, the raw material is mainly polyethylene particles, the gram weight of the polyethylene sheet material is more than 40g / m < 2 >, and the BET specific area is more than 9m < 2 > / gm; the mass fraction of the polyethylene particles in the polyethylene sheet material is more than 80%; the raw materials further comprise one or more of a polyethylene homologue, polypropylene, polyolefin, polybutylene-1, poly (4-methyl-1-pentene) and polyvinylidene fluoride. The material has good performance and has a wide application field.

Description

【Technical field】 [0001] The invention relates to the technical field of textiles, in particular to a polyethylene sheet material. 【Background technique】 [0002] Flash spinning, also known as flash spinning, flash spinning or flash spinning, and instantaneous solvent volatilization to form a web, does not use melt spinning, but dry spinning technology. That is, the high polymer is dissolved in a certain solvent to make a spinning solution, and then sprayed out from the spinneret hole, and the high polymer is re-solidified into fibers due to the sharp volatilization of the solvent. At the same time, the dry spinning technology used in the flash method is different from the ordinary dry spinning, mainly reflected in the fact that the flash method uses a lower viscosity of the spinning solution, and the spinneret hole is sprayed at a very high pressure and speed. spray out. Due to the low viscosity and good fluidity of the solution, the liquid filaments solidify during high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/18D01F1/10D01F6/04D01F6/30D01F6/46
CPCB01D53/18B01D53/1493B01D53/1425D01F6/04D01F6/30D01F6/46D01F1/10
Inventor 叶孔萌
Owner JIANGSU QINGYUN NEW MATERIAL TECH CO LTD