CN115961496B - Nanofiber forming device - Google Patents
Nanofiber forming device Download PDFInfo
- Publication number
- CN115961496B CN115961496B CN202211572385.XA CN202211572385A CN115961496B CN 115961496 B CN115961496 B CN 115961496B CN 202211572385 A CN202211572385 A CN 202211572385A CN 115961496 B CN115961496 B CN 115961496B
- Authority
- CN
- China
- Prior art keywords
- flow channel
- pulp
- nanofiber
- runner
- slurry
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000002121 nanofiber Substances 0.000 title claims abstract description 36
- 239000002002 slurry Substances 0.000 claims abstract description 27
- 238000009826 distribution Methods 0.000 claims abstract description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000016615 flocculation Effects 0.000 description 5
- 238000005189 flocculation Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000002134 carbon nanofiber Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Paper (AREA)
Abstract
The invention relates to a nanofiber forming device which is of a fully-closed structure and comprises an expansion type runner pulp distributor, a runner and an adjustable upper lip plate mechanism which are sequentially connected, wherein the expansion type runner pulp distributor is of a straight-up Shan Liudao type, the cross section area of the runner vertical to the pulp flow direction is gradually enlarged, the cross section area is enlarged from a round hole with the same diameter as a pulp pipe at a pulp inlet to a rectangular area which is equal to the diameter of a near-pulp box, so that stable isobaric distribution of ultralow-concentration nanofiber pulp is formed along the width direction, the inlet of the runner is rectangular, the cross section area is further suddenly changed to be larger, the height in the runner can be adjusted, the adjustable upper lip plate mechanism can be adjusted to be displaced, and the front-back translation adjustment can be performed while the local fine adjustment of the lip opening height is realized. The invention has simple structure, is suitable for forming 0.01-0.05% of ultra-low concentration nanofiber slurry, and adopts a fully-closed structure, so that the nanofibers can be prevented from contacting air, and a large number of bubbles are avoided. With the continuous heating of the application of the nanofiber in the hot spot field, the method has a huge market prospect.
Description
Technical Field
The invention relates to a nanofiber forming device, which is mainly used for the production field of special materials (such as nanofiber membrane materials, nanometer aramid fiber materials, nanometer carbon nanotube materials and the like) taking nanofibers as raw materials.
Background
The special material characteristics become a new hot spot for current domestic and foreign development. The nanofiber can be applied to composite material reinforcement, such as carbon nanofiber and carbon nanotube, can be applied to high-efficiency filter media, can remarkably improve the filter efficiency, and can be applied to the biomedical field, precision electronics and optical devices, and the new fields have huge market potential. Thus, nanofiber forming is a currently urgent problem to be solved.
Disclosure of Invention
The invention provides a forming device for nanofiber raw materials, which is suitable for forming 0.01% -0.05% of ultralow-concentration nanofiber slurry, and is of a fully-closed structure, and comprises an expansion type flow passage slurry distributor, a flow passage and an adjustable upper lip plate mechanism which are sequentially connected, wherein the expansion type flow passage slurry distributor is of a straight-up Shan Liudao type, the flow passage cross section perpendicular to the slurry flow direction is gradually enlarged, and is enlarged from a round hole with the diameter being equal to that of a slurry pipe at a slurry inlet to a rectangular area equal to that at a position close to a slurry box, so that the ultralow-concentration nanofiber slurry forms stable isobaric distribution along the width direction, the flow passage inlet is rectangular, the cross section is further enlarged suddenly, the purposes of preventing fiber flocculation, promoting fiber dispersion and improving forming uniformity are achieved, the height in the flow passage is adjustable, the speed-up or speed-down effect on the slurry flow is achieved, the adaptability of the slurry box to the process is improved, the adjustable upper lip plate mechanism can adjust the displacement, the local fine adjustment of the height of the lip opening can be achieved, the front-back translation adjustment is also easy, the position of the upper lip opening is controlled moderately, the position of the upper slurry flow is controlled, the liquid level is better, the longitudinal flow forming locus of the nanofiber slurry is better controlled, the uniformity is better, and the forming stability is better improved.
As a preferable scheme, the horizontal inclination angle of a single vertical-lifting flow channel of the expanding flow channel pulp distributor is smaller than or equal to 60 degrees, the too large inclination angle can cause too rapid expansion, the pulp flows can be separated, vortex is generated at the side wall, and further flocculation of fibers is caused.
As a preferable scheme, the adjustable range of the height of the flow channel is 5 mm-80 mm, and the adaptability of the headbox to the process is improved by adjusting the height of the flow channel.
The invention is used for producing special materials of nanofiber raw materials, has simple structure and is particularly suitable for developing new products of nanofiber raw materials. Because the nanofiber has special material characteristics such as extremely large specific surface area and the like, the higher the concentration is, the more easily the nanofiber is flocculated and a large amount of bubbles are generated, so that in order to improve the forming uniformity quality of the nanofiber, the optimal method is to adopt an ultralow-concentration forming and fully-closed structure, and in the slurry forming process, on one hand, the flocculation among the nanofibers can be reduced by adopting 0.01-0.05% ultralow-concentration forming, and the forming concentration is one tenth or even one hundredth of the conventional papermaking forming concentration. On the other hand, the adoption of the fully-closed structure can avoid the nanofiber from contacting with air, thereby avoiding the generation of a large number of bubbles. With the continuous heating of the application of the nanofiber in the hot spot field, the method has a huge market prospect.
The accompanying drawings illustrate.
Fig. 1 is a schematic structural view of the present invention.
In the figure, a spreading flow channel pulp distributor, a flow channel, an adjustable upper lip plate mechanism, a spreading flow channel pulp distributor inlet and a lip opening are shown in the figure.
Detailed description of the preferred embodiments.
The nanofiber forming device is mainly used for forming nanofiber raw materials, is suitable for forming 0.01% -0.05% ultralow-concentration nanofiber slurry, is of a fully-closed structure, and comprises an expansion type runner slurry distributor, a runner and an adjustable upper lip plate mechanism which are sequentially connected, wherein the expansion type runner slurry distributor is of a straight-up Shan Liudao type and is formed by welding stainless steel, and the nanofiber forming device is free of deformation, stable in size, smooth in inner wall, easy to clean, and does not hang slurry. The cross section of the flow channel perpendicular to the pulp flow direction of the expansion type flow channel pulp distributor is gradually enlarged from a round hole with the same diameter as a pulp pipe at a pulp inlet to a rectangular area which is equal to that of a near-flow box so as to ensure that ultra-low concentration nano fiber pulp forms stable equal pressure distribution along the width direction, the flow channel inlet is rectangular, the cross section is further suddenly changed and enlarged, the purposes of preventing fiber flocculation, promoting fiber dispersion and improving forming uniformity are achieved, the height in the flow channel is adjustable, thereby having the effect of increasing or reducing speed on pulp flow and improving the adaptability of the flow box to the process, and the adjustable upper lip plate mechanism can adjust displacement, can perform front-back translation adjustment while realizing local fine adjustment of the height of a lip opening, thereby moderately controlling the direction and position of the upper web pulp flow, being more beneficial to the forming of nano fiber pulp, being easier to eliminate liquid level fluctuation, controlling the pulp flow track, being beneficial to improving the longitudinal stability of pulp flow and being more beneficial to improving the forming uniformity.
The ultra-low concentration nanofiber slurry flows in from the inlet 4 of the expanding runner pulp distributor, the slurry is gradually expanded along the cross-sectional area of the runner perpendicular to the flow direction of the slurry to form stable isobaric distribution, each flow has the same pressure loss, the whole width is uniformly distributed into the runner 2, the inlet of the runner 2 is rectangular, the cross-sectional area is further expanded, the cross-sectional area is abrupt, and the effect similar to that of a stepped diffuser is achieved, so that the purposes of preventing fiber flocculation and promoting fiber dispersion are achieved, and favorable conditions are provided for forming. Meanwhile, the height in the flow channel is adjustable, and the adaptability of the headbox to the process is improved by adjusting the height of the flow channel. Finally, the nanofiber slurry flows to the lip 5, and after the fluctuation of the liquid level is eliminated and the slurry flow track is controlled by the adjustable upper lip plate mechanism 3, the nanofiber forming uniformity quality is further improved.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211572385.XA CN115961496B (en) | 2022-12-08 | 2022-12-08 | Nanofiber forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211572385.XA CN115961496B (en) | 2022-12-08 | 2022-12-08 | Nanofiber forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115961496A CN115961496A (en) | 2023-04-14 |
| CN115961496B true CN115961496B (en) | 2025-01-10 |
Family
ID=87362669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211572385.XA Active CN115961496B (en) | 2022-12-08 | 2022-12-08 | Nanofiber forming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115961496B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203238493U (en) * | 2013-05-21 | 2013-10-16 | 甘木林 | Novel headbox |
| CN208266573U (en) * | 2018-05-04 | 2018-12-21 | 苏州美森无纺科技有限公司 | Head box |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055024A (en) * | 1990-03-17 | 1991-10-02 | 湖北省沙市轻工机械总厂 | Thin paper forming device for cylinder machine |
| EP1987329B1 (en) * | 2006-02-01 | 2011-08-03 | AstenJohnson, Inc. | Headbox and stock delivery system for a papermaking machine |
| CN101619551A (en) * | 2008-12-03 | 2010-01-06 | 富阳市钱旺纸业有限公司 | Low quantitative macrofiber pressurized cambered netty groove |
| CN102691224A (en) * | 2012-05-28 | 2012-09-26 | 华南理工大学 | Ultralow-speed flow box device |
| CN203821161U (en) * | 2014-04-21 | 2014-09-10 | 枣庄市亿利达造纸机械有限公司 | Fully-closed type oblique net molding device |
-
2022
- 2022-12-08 CN CN202211572385.XA patent/CN115961496B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203238493U (en) * | 2013-05-21 | 2013-10-16 | 甘木林 | Novel headbox |
| CN208266573U (en) * | 2018-05-04 | 2018-12-21 | 苏州美森无纺科技有限公司 | Head box |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115961496A (en) | 2023-04-14 |
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