CN113914012A - Aramid fiber non-woven paper production process - Google Patents
Aramid fiber non-woven paper production process Download PDFInfo
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- CN113914012A CN113914012A CN202111303840.1A CN202111303840A CN113914012A CN 113914012 A CN113914012 A CN 113914012A CN 202111303840 A CN202111303840 A CN 202111303840A CN 113914012 A CN113914012 A CN 113914012A
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- aramid
- aramid fiber
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- 229920006231 aramid fiber Polymers 0.000 title claims abstract description 58
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims description 27
- 238000003825 pressing Methods 0.000 claims description 25
- 239000004760 aramid Substances 0.000 claims description 23
- 229920003235 aromatic polyamide Polymers 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 15
- 238000007906 compression Methods 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 9
- 238000009960 carding Methods 0.000 claims description 7
- 238000007596 consolidation process Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 4
- 230000032683 aging Effects 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract 1
- 239000011810 insulating material Substances 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012811 non-conductive material Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000012364 cultivation method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4326—Condensation or reaction polymers
- D04H1/4334—Polyamides
- D04H1/4342—Aromatic polyamides
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
- D04H1/49—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation entanglement by fluid jet in combination with another consolidation means
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
- D06C7/02—Setting
Abstract
The invention discloses a production process of aramid fiber non-woven paper, which is characterized in that aramid fiber is firstly prepared into aramid fiber non-woven fabric through a spunlace entanglement process and then is processed through high-temperature pressurization to form the aramid fiber non-woven paper. The aramid fiber is made into the non-woven paper through high temperature and high pressure, and the aramid fiber has the advantages of high temperature resistance, high strength and long service life, and has the excellent performances of ultrahigh strength, high temperature resistance, insulation, ageing resistance, long service life and the like, so that the aramid fiber non-woven paper made of the aramid fiber has the characteristics of high temperature resistance grade, high strength and long service life, and can meet the use requirements of novel voltage transformation and new energy automobile driving motors.
Description
Technical Field
The invention relates to the technical field of special material preparation, and particularly relates to a production process of aramid fiber non-woven paper.
Background
The insulating material is a non-conductive material under the allowable voltage, but is not an absolutely non-conductive material, the processes of conduction, polarization, loss, breakdown and the like can also occur under the action of certain external electric field intensity, the insulating material can also age after long-term use, and the resistivity of the insulating material is very high and is usually in the range of 1010-2020 omega.M. For example, in an electric motor, insulation around the conductors isolates the zones from each other and from the grounded stator core to ensure safe operation of the motor. The conventional insulating paper is prepared by using an insulating fiber product as a substrate and soaking the substrate with insulating paint, has certain insulating performance, but has low heat resistance (below H level) and easy aging, so the service life is short (1-3 years). The insulating paper with the H-grade heat-resistant grade can only be made of asbestos, glass fiber and other materials, the heat-resistant grade can reach the C-grade, but the mechanical strength and the service life of the insulating paper can influence the change and the development of the motor technology of new energy automobiles, the heat-resistant grade is more than the C-grade, the service life is required to be more than 10 years, and the common insulator in the prior art can not meet the requirements.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a production process of novel insulating material aramid fiber non-woven paper, which has high heat resistance grade and long service life.
In order to achieve the purpose, the invention provides the following technical scheme: a production process of aramid fiber non-woven paper comprises the following steps of firstly preparing aramid fiber non-woven fabric from aramid fiber by a spunlace entanglement process, and then carrying out high-temperature pressure processing to form the aramid fiber non-woven paper,
A. opening and mixing, namely quantitatively conveying the aramid fibers to an opener, and opening and mixing the fibers;
B. the web formation, the fibers after opening are sent into a carding machine or an air-laid machine, the aramid fibers are carded or air-laid to form a web, and two or more carding machines can also be used for connecting in series and combining to form a web according to the unit gram weight requirement of a finished product;
C. carrying out spunlace entanglement, namely carrying out spunlace consolidation on the fiber web through high-pressure water to obtain aramid fiber non-woven fabric;
D. the aramid fiber non-woven fabric after spunlace consolidation is bulkier through special high-temperature pressurizing processing, and becomes thinner and harder after the special high-temperature pressurizing processing, so that the aramid fiber non-woven fabric becomes aramid fiber non-woven paper.
Further, in the step D, the temperature of high-temperature pressurization is 260-300 ℃, and the pressure is not less than 20 KN/CM.
Furthermore, in the step D, a plurality of compression rollers are adopted in the high-temperature pressurizing process, the compression rollers are in a parallel structure, fibers sequentially penetrate through the compression rollers from top to bottom and are output, two pressurizing points are arranged on the compression rollers, the pressure towards the middle direction is more than or equal to 10KN/CM on the uppermost compression roller and the compression roller at the lowest end, and the upward pressure is more than or equal to 20KN/CM on the two ends of the compression roller at the lowest end. The first pressurizing point is an upward pressure point arranged at two ends of the bottommost pressing roller, the second pressurizing point is positioned on the inner sides of the uppermost pressing roller and the bottommost pressing roller, a plurality of pressurizing points can be arranged according to the length of the pressing rollers, and after the second pressurizing point is arranged, the pressure between the pressing rollers can be controlled to reach balanced consistency, so that the uniformity between finished products is ensured.
Furthermore, step D adopts four rolls and above compression roller technology, adopts four rolls and above compression roller S-shaped to advance cloth mode pressurization, can make aramid fiber non-woven fabrics pressurize for cubic and many times, compares in the mode that only once pressurized in ordinary two roll pressurization, has promoted the pressurization effect, is favorable to finished product shaping.
Furthermore, the aramid fiber is aramid 1313 fiber or aramid 1414 fiber or mixed fiber thereof, and the fiber length is 38-51 mm. The fiber length of the conventional paper is 4-10 mm, so that the aramid fiber non-woven paper has higher mechanical strength than the common paper and long service life.
Further, the product density of the aramid non-woven paper is 900-1000 KG/m, and the density reaches the standard density of paper.
In conclusion, the aramid fiber is made into the non-woven paper through high temperature and high pressure, and the aramid fiber has the advantages of high temperature resistance, high strength and long service life due to the fact that the aramid fiber has the excellent performances of being ultrahigh in strength, high in temperature resistance, insulating, anti-aging, long in service life and the like, and the use requirements of novel variable voltage and new energy automobile driving motors can be met.
Drawings
FIG. 1 is a front view of a step D structure according to an embodiment of the present invention;
FIG. 2 is a side view of the structure of step D of the present invention.
Detailed Description
The specific embodiment of the aramid nonwoven paper production process of the present invention is further described with reference to fig. 1 to 2.
A production process of aramid fiber non-woven paper comprises the following steps of firstly preparing aramid fiber non-woven fabric from aramid fiber by a spunlace entanglement process, and then carrying out high-temperature pressure processing to form the aramid fiber non-woven paper,
A. opening and mixing, namely weighing aramid fibers quantitatively and conveying the aramid fibers to an opener, and opening and mixing the fibers;
B. the method comprises the following steps of (1) forming a net, namely feeding the opened fibers into a carding machine or an air-laid machine, carding the aramid fibers or forming a net by air-laid, and combining the aramid fibers into a net by two or more carding machines in series or forming a net by cross lapping according to the unit gram weight requirement of a finished product;
C. carrying out spunlace entanglement, namely carrying out spunlace consolidation on the fiber web through high-pressure water to obtain aramid fiber non-woven fabric;
D. the aramid fiber non-woven fabric after spunlace consolidation is bulkier through special high-temperature pressurizing processing, and becomes thinner and harder after the special high-temperature pressurizing processing, so that the aramid fiber non-woven fabric becomes aramid fiber non-woven paper.
In this embodiment, in the step D, the temperature of the high-temperature pressurization is 260 to 300 ℃, and the pressure is not less than 20 KN/CM.
In this embodiment, preferably, in the step D, the high-temperature pressurizing process adopts a structure in which a plurality of press rolls are parallel to each other, the fiber sequentially passes through the press rolls from top to bottom and is output, the pressure of the press rolls is provided with two pressurizing points, the pressure in the middle direction is more than or equal to 10KN/CM on each of the uppermost press roll and the lowermost press roll, and the upward pressure is more than or equal to 20KN/CM on each of the two ends of the lowermost press roll. The first pressurizing point is an upward pressure point arranged at two ends of the bottommost pressing roller, the second pressurizing point is positioned on the inner sides of the uppermost pressing roller and the bottommost pressing roller, a plurality of pressurizing points can be arranged according to the length of the pressing rollers, and after the second pressurizing point is arranged, the pressure between the pressing rollers can be controlled to reach balanced consistency, so that the uniformity between finished products is ensured.
Preferably, in the step D, a process of four or more rollers is adopted, and the S-shaped cloth feeding manner of four or more rollers is adopted for pressurization, so that the aramid nonwoven fabric can be pressurized three times or more, and compared with a manner of only one-time pressurization in ordinary two-roller pressurization, the pressurization effect is improved, and the finished product molding is facilitated.
In the embodiment, preferably, the aramid fiber is aramid 1313 fiber, aramid 1414 fiber or a mixed fiber thereof, and the fiber length is 38-51 mm. The fiber length of the conventional paper is 4-10 mm, so that the aramid fiber non-woven paper has higher mechanical strength than the common paper and long service life.
Preferably, the density of the aramid nonwoven paper is 900-1000 KG/m through the top-bottom-up cultivation method, and the density reaches the standard density of the paper.
In the embodiment, as shown in fig. 1 and fig. 2, a four-roller pressurizing process is adopted, the aramid fiber non-woven fabric is fed between a first pressing roller and a second pressing roller, passes through a space between the second pressing roller and a third pressing roller, and is output from a space between the third pressing roller and a fourth pressing roller, the temperature of the pressing roller and the third pressing roller is set to be 260-300 ℃, the pressure applied between the first pressing roller and the second pressing roller and between the third pressing roller and the fourth pressing roller is not less than 10KN/CM, the directions are inward, the upward pressure applied at two ends of the four pressing rollers is not less than 20KN/CM, the high pressure between the pressing rollers is ensured, the non-woven fabric is thinned and hardened after being pressed, and finally the non-woven paper can be formed.
Insulation material, english name: insulating mail, characteristics: insulation resistance, heat resistance, moisture resistance, and resistivity of more than 10 hundred million Ω · M, and are classified into gas, liquid, and solid insulating materials. The main performance criteria of the insulation material include: (1) breakdown strength, the electric field strength of an insulating material when broken down, called breakdown strength, in units of: KV/MM; (2) heat resistance, wherein the heat resistance degrees of the insulating materials with different components are different, and the heat resistance grade is Y, A, E, B, F, H, C, seven grades and C with the highest grade being 3; (3) an insulation resistance; (4) mechanical engineering performance; (5) other indicators.
The technical indexes of the aramid fiber non-woven paper manufactured by the process are shown in the table through tests.
From the above, it can be concluded that: the mechanical property of the aramid fiber non-woven fabric is far better than that of common insulating paper, and the service life of the aramid fiber non-woven fabric is longer than that of the common insulating paper.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (6)
1. A production process of aramid fiber non-woven paper is characterized by comprising the following steps: the aramid fiber non-woven fabric is prepared by aramid fiber through a spunlace entanglement process, and then the aramid fiber non-woven fabric is formed through high-temperature pressurization processing, and the method specifically comprises the following steps,
opening and mixing, namely quantitatively conveying the aramid fibers to an opener, and opening and mixing the fibers;
the web formation, the fibers after opening are sent into a carding machine or an air-laid machine, the aramid fibers are carded or air-laid to form a web, and two or more carding machines can also be used for connecting in series and combining to form a web according to the unit gram weight requirement of a finished product;
carrying out spunlace entanglement, namely carrying out spunlace consolidation on the fiber web through high-pressure water to obtain aramid fiber non-woven fabric;
D. the aramid fiber non-woven fabric after spunlace consolidation is bulkier through special high-temperature pressurizing processing, and becomes thinner and harder after the special high-temperature pressurizing processing, so that the aramid fiber non-woven fabric becomes aramid fiber non-woven paper.
2. The aramid nonwoven paper production process of claim 1, characterized in that: in the step D, the temperature of high-temperature pressurization is 260-300 ℃, and the pressure is not less than 20 KN/CM.
3. The aramid nonwoven paper production process of claim 2, characterized in that: and D, in the high-temperature pressurizing process, a plurality of compression rollers are arranged in parallel, fibers sequentially penetrate through the compression rollers from top to bottom and are output, two pressurizing points are arranged on the compression rollers, the pressure towards the middle direction is more than or equal to 10KN/CM on the uppermost compression roller and the lowermost compression roller, and the upward pressure is more than or equal to 20KN/CM on the two ends of the lowermost compression roller.
4. The aramid nonwoven paper production process of claim 3, characterized in that: and the step D adopts a four-roller or above-roller pressing process.
5. The aramid nonwoven paper production process of claim 1, characterized in that: the aramid fiber is aramid 1313 fiber, aramid 1414 fiber or mixed fiber thereof, and the fiber length is 38-51 mm.
6. The aramid nonwoven paper production process of claim 1, characterized in that: the density of the aramid fiber non-woven paper is 900-1000 KG/m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111303840.1A CN113914012A (en) | 2021-11-05 | 2021-11-05 | Aramid fiber non-woven paper production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111303840.1A CN113914012A (en) | 2021-11-05 | 2021-11-05 | Aramid fiber non-woven paper production process |
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| Publication Number | Publication Date |
|---|---|
| CN113914012A true CN113914012A (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111303840.1A Pending CN113914012A (en) | 2021-11-05 | 2021-11-05 | Aramid fiber non-woven paper production process |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07331570A (en) * | 1994-06-06 | 1995-12-19 | Teijin Ltd | Aramid nonwoven fabric and its production |
| JP2001040597A (en) * | 1999-07-22 | 2001-02-13 | Toray Ind Inc | Hydrophilic nonwoven fabric, battery separator and battery |
| CN101831760A (en) * | 2010-05-27 | 2010-09-15 | 浙江弘扬无纺新材料有限公司 | Production method of meta-position aramid nonwoven material for electric insulation |
| CN102877248A (en) * | 2012-09-13 | 2013-01-16 | 梁少奇 | Pressure-assisted weaving and dyeing compression roller capable of preventing pressure non-uniformity of middle edges |
| CN103603137A (en) * | 2013-11-11 | 2014-02-26 | 绍兴市恒睿无纺布科技有限公司 | Papermaking rubber roller with high-strength non-woven and production process |
| CN208167254U (en) * | 2017-12-20 | 2018-11-30 | 邹志敏 | A kind of cellucotton net thermocompression forming mechanism |
| CN210703856U (en) * | 2019-09-17 | 2020-06-09 | 苏州中航盛世刀辊制造有限公司 | Multi-point pressurizing jig |
-
2021
- 2021-11-05 CN CN202111303840.1A patent/CN113914012A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07331570A (en) * | 1994-06-06 | 1995-12-19 | Teijin Ltd | Aramid nonwoven fabric and its production |
| JP2001040597A (en) * | 1999-07-22 | 2001-02-13 | Toray Ind Inc | Hydrophilic nonwoven fabric, battery separator and battery |
| CN101831760A (en) * | 2010-05-27 | 2010-09-15 | 浙江弘扬无纺新材料有限公司 | Production method of meta-position aramid nonwoven material for electric insulation |
| CN102877248A (en) * | 2012-09-13 | 2013-01-16 | 梁少奇 | Pressure-assisted weaving and dyeing compression roller capable of preventing pressure non-uniformity of middle edges |
| CN103603137A (en) * | 2013-11-11 | 2014-02-26 | 绍兴市恒睿无纺布科技有限公司 | Papermaking rubber roller with high-strength non-woven and production process |
| CN208167254U (en) * | 2017-12-20 | 2018-11-30 | 邹志敏 | A kind of cellucotton net thermocompression forming mechanism |
| CN210703856U (en) * | 2019-09-17 | 2020-06-09 | 苏州中航盛世刀辊制造有限公司 | Multi-point pressurizing jig |
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Application publication date: 20220111 |