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Nano-filtration membrane base material production method based on wet papermaking technology

A production method and nanofiltration membrane technology, applied in papermaking, papermaking, textiles and papermaking, etc., can solve the problems of large pore size and porosity, poor surface smoothness, poor tensile strength, etc., and achieve good pollution resistance, The effect of uniform moisture and good paper evenness

Inactive Publication Date: 2019-04-16
衢州珮珀新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings of the prior art film substrate (non-woven fabric) in its longitudinal and transverse tensile strength, poor uniformity, large pore size and porosity, and poor surface smoothness, and provide a method based on wet method The production method of nanofiltration membrane substrate in papermaking technology, the membrane substrate produced by this method has good longitudinal and transverse tensile strength, good uniformity, uniform pore size distribution, and suitable porosity

Method used

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  • Nano-filtration membrane base material production method based on wet papermaking technology
  • Nano-filtration membrane base material production method based on wet papermaking technology
  • Nano-filtration membrane base material production method based on wet papermaking technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A nanofiltration membrane substrate production method based on wet papermaking technology, the method steps are as follows:

[0027] S1: After preparing the fluffed chemical fiber, mix the slurry, and control the mass concentration of the slurry to 0.5%;

[0028] S2: The slurry is added with a dispersant and defoamer before flushing, and then enters the sand remover. The amount of dispersant is 1% of the slurry mass, and the amount of defoamer is 0.01% of the slurry mass. There are three sections;

[0029] S3: enter the secondary flushing;

[0030] S4: After the second flushing, enter the pressure screen for processing, add PEO retention aid at the outlet of the pressure screen, and the mass dosage of PEO retention aid is 0.003%;

[0031] S5: the slurry in step S4 flows into the headbox and is copied on the Internet;

[0032] S6: press dehydration;

[0033] S7: drying treatment;

[0034] S8: Calender processing;

[0035] S9: Coiling, rewinding, cutting, packaging ...

Embodiment 2

[0042] A nanofiltration membrane substrate production method based on wet papermaking technology, the method steps are as follows:

[0043] S1: After preparing the fluffed chemical fiber, mix the slurry, and control the concentration of the slurry to 3%;

[0044] S2: Add dispersant and defoamer to the slurry before flushing once, and then enter the sand remover. The amount of dispersant is 3% of the slurry mass, and the amount of defoamer is 0.03% of the slurry mass. There are three paragraphs;

[0045] S3: enter the secondary flushing;

[0046] S4: After the second flushing, enter the pressure sieve for processing, add PEO retention aid at the outlet of the pressure sieve, and the mass dosage of PEO retention aid is 0.006%;

[0047] S5: the slurry in step S4 flows into the headbox and is copied on the Internet;

[0048] S6: press dehydration;

[0049] S7: drying treatment;

[0050] S8: Calender processing;

[0051] S9: Coiling, rewinding, cutting, packaging and storage....

Embodiment 3

[0059] A nanofiltration membrane substrate production method based on wet papermaking technology, the method steps are as follows:

[0060] S1: After preparing the fluffed chemical fiber, mix the slurry, and control the concentration of the slurry to 2%;

[0061]S2: Add dispersant and defoamer to the slurry before flushing once, and then enter the sand remover. The amount of dispersant is 2% of the slurry mass, and the amount of defoamer is 0.02% of the slurry mass. There are three sections;

[0062] S3: enter the secondary flushing;

[0063] S4: After the second flushing, enter the pressure sieve for processing, add PEO retention aid at the outlet of the pressure sieve, and the mass dosage of PEO retention aid is 0.005%;

[0064] S5: the slurry in step S4 flows into the headbox and is copied on the Internet;

[0065] S6: press dehydration;

[0066] S7: drying treatment;

[0067] S8: Calender treatment;

[0068] S9: Coiling, rewinding, cutting, packaging and storage.

...

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Abstract

The invention relates to a nano-filtration membrane base material production method based on a wet papermaking technology. The nano-filtration membrane base material production method comprises: S1, preparing disintegrated chemical fiber, and then preparing a slurry, wherein the mass concentration of the slurry is controlled at 0.5-3%; S2, adding a dispersant and an anti-foaming agent before firstslurry rinsing, and feeding into a sand removing device, wherein the dispersant accounts for 1-3% of the mass of the slurry, the anti-foaming agent accounts for 0.01-0.03% of the mass of the slurry,and the sand removing device is divided into at least three sections; S3, feeding into second slurry rinsing; S4, after completing the second slurry rinsing, feeding into a pressure sieve, treating, and adding 0.003-0.006% by mass of a PEO retention aid at the outlet of the pressure sieve; S5, making the slurry prepared in the step S4 flow into a headbox, loading onto a net, and carrying out papermaking; S6, carrying out pressing dewatering; S7, drying; S8, treating by a calender; and S9, winding, carrying out re-winding slitting, and carrying out packaging warehouse. According to the presentinvention, the nano-filtration membrane base material produced by the method has advantages of good paper uniformity, uniform paper quantitation, uniform paper thickness, uniform paper moisture, low banner quantitative deviation and uniform banner moisture, and further has a longitudinal tensile strength of more than 11 kN / m.

Description

technical field [0001] The invention relates to a method for producing a nanofiltration membrane base material based on wet papermaking technology, and belongs to the technical field of polymer material processing. Background technique [0002] The membrane base material (non-woven fabric) of existing nanofiltration membrane is widely used in roll-type membrane module, tubular membrane module, flat membrane module and water treatment industry, because the membrane base material (non-woven fabric) of nanofiltration membrane ) is produced by dry-laid non-woven fabric production process, which has poor longitudinal and transverse tensile strength, poor uniformity, large pore size and porosity, and poor surface smoothness. It is only suitable for use in industrial wastewater treatment, especially not suitable for seawater Desalination, water purification and other aspects of use. As an improvement, in the prior art, compared with the membrane substrate of nanofiltration membran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/06D21H21/12D21H21/10D21H13/24D21H13/14D21F11/00D21H17/53
CPCD21F11/00D21H13/14D21H13/24D21H17/53D21H21/06D21H21/10D21H21/12
Inventor 俞正江陈炳祥
Owner 衢州珮珀新材料科技有限公司
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