CN112779783B - Preparation method of polyimide mesh fabric - Google Patents
Preparation method of polyimide mesh fabric Download PDFInfo
- Publication number
- CN112779783B CN112779783B CN202110004256.XA CN202110004256A CN112779783B CN 112779783 B CN112779783 B CN 112779783B CN 202110004256 A CN202110004256 A CN 202110004256A CN 112779783 B CN112779783 B CN 112779783B
- Authority
- CN
- China
- Prior art keywords
- cloth
- polyimide
- mesh
- mesh cloth
- hot
- 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.)
- Active
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/59—Polyamides; Polyimides
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B15/00—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours
-
- 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
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
- D06H7/00—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, e.g. by ultrasonic waves, corona discharge, irradiation, electric currents or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/55—Epoxy resins
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Woven Fabrics (AREA)
Abstract
The invention relates to a preparation method of polyimide mesh cloth, in particular to a process for shaping the mesh cloth after molding. The method comprises the following steps: treating the surface of the fiber before weaving the mesh cloth; weaving mesh cloth; after the grid cloth is woven, PAA coating, hot-press forming and cutting are carried out; and carrying out high-temperature treatment on the shaped mesh cloth. The grid cloth prepared by the invention solves the problems that the polyimide grid cloth is easy to curl and difficult to shape, and fibers are easy to break in the cutting process, improves the dimensional stability and the high temperature resistance, and reduces the shrinkage rate of the grid cloth.
Description
Technical Field
The invention relates to the field of organic fiber fabrics, in particular to a preparation process of polyimide mesh fabric.
Background
Polyimide is a high-performance organic fiber and has the characteristics of excellent mechanical property, high and low temperature resistance, self-extinguishing property, radiation resistance, dielectric property, corrosion resistance, biocompatibility, low density, low water absorption, small thermal expansion coefficient and the like. Is determined to be one of the indispensable high polymer materials with wide development prospect in the fields of aerospace, electronics, war industry, ships, automobiles, nuclear power, fire fighting and the like. The composite material can be used for preparing products such as bulletproof fabrics, high-specific strength ropes, space suits, fire uniforms and the like, and can also be used as a reinforcing material to prepare a high-performance composite material to be applied to advanced weaponry and national defense high-tech products such as novel satellites, airships, airplanes and the like. In the environmental protection industry, the high temperature resistant polyimide fiber can be used as a dust removal filter material of an incinerator. However, the polyamide fiber is insoluble and infusible, and has the problems of difficult shaping, difficult cutting, poor dimensional stability and the like.
The grid cloth has the characteristics of good chemical stability, high strength, light weight, good dimensional stability, good positioning property, good impact resistance and the like, and can be used as a reinforced base material and also can be directly used as a finished product. However, in the existing polyimide mesh fabric preparation process, the problems that fibers are easy to fuzz, weaving holes are caused after wool balls are accumulated, quality is affected, and smooth weaving and forming cannot be achieved still exist, shaping is difficult to achieve in the mesh fabric preparation process, or even if shaping is achieved, the high temperature resistance and the dimensional stability of the prepared mesh fabric are low, and the requirements of high temperature resistance and stability in special fields cannot be met.
Disclosure of Invention
The invention aims to provide a preparation method of a polyimide mesh fabric, optimize a preparation process of a PI mesh fabric, solve the problems that the polyimide mesh fabric is easy to fluff and curl, difficult to shape, easy to break fibers in a cutting process and the like in the preparation process of the polyimide mesh fabric in the prior art, improve the high temperature resistance and the dimensional stability of the PI mesh fabric, and reduce the shrinkage rate of the PI mesh fabric.
The method comprises the steps of soaking polyimide mesh cloth in PAA (polyamide acid, namely a precursor of polyimide), sequentially unfolding the mesh cloth to a certain width by a cloth guide wheel, then passing the mesh cloth through a belt pulley with a certain width, entering a hot-pressing plate for hot-pressing and shaping, changing the mesh cloth into flat mesh cloth with certain hardness after the mesh cloth passes through the hot-pressing plate, and cutting the mesh cloth with a certain width by a cutter after the hot-pressing plate comes out.
One of the invention is to dip the surface of the polyimide fiber with epoxy slurry, eliminate surface static electricity, improve the wear resistance and bundling property of the fiber, facilitate subsequent weaving and forming, prevent fiber breakage in the cutting process and improve weaving efficiency and forming rate.
The second invention of the invention is that PAA is used, the shaping is realized by hot-pressing and drying, and the problems of easy curling and difficult shaping are solved, meanwhile, PAA is a precursor of polyimide, and the PAA can be converted into PI after treatment, thereby not only solving the problems of easy curling and difficult shaping, but also ensuring the problem of poor temperature resistance of the polyimide mesh fabric; the broken fibers are removed in the cutting process because the fibers are not bundled, and the fiber tows can be bonded into a single state through PAA with a certain concentration, so that the problem that the broken fibers are easy to remove is further solved.
A preparation method for preparing polyimide gridding cloth comprises the following steps:
step 1), treating the surface of polyimide fiber;
step 2), weaving the polyimide fibers subjected to the surface treatment in the step 1) into polyimide mesh cloth;
step 3), carrying out PAA coating, hot-press shaping, cutting and net folding on the polyimide mesh cloth woven in the step 2);
and 4) performing high-temperature treatment on the polyimide mesh cloth shaped and cut in the step 3).
In the step 1), the method for treating the surface of the polyimide fiber comprises the following steps: the polyimide fiber is soaked in the epoxy slurry, and the surface of the polyimide fiber is coated with a thin layer of the epoxy slurry to form a thin layer of slurry film, so that the wear resistance and the bundling performance of the fiber are improved, and the weaving efficiency and the forming rate are improved.
The preparation method of the epoxy slurry comprises the following steps: the compound containing amino group is reacted with epoxy and then combined with weak acid to produce weak cationic water-thinned epoxy emulsion. The epoxy emulsion is used at a mass concentration of 1-10% for a slurry dipping time of 5-60 s, preferably at a concentration of 5% for 10s. The amino group-containing compound is aminoethanesulfonic acid, ethylenediamine, or the like.
The weak cation epoxy with amino refers to epoxy emulsion with amino, wherein the amino has strong electron-withdrawing ability and can combine hydrogen ions into weak cations with N atoms combined with one hydrogen ion in water. For example:
(1) aminoethanesulfonic acid epoxy
Amino ethanesulfonic acid weak cation epoxy
(2) Amino epoxy
Amino weak cationic epoxy
In the step 3), PAA coating and hot press forming are required after the mesh fabric is woven, and PAA coating and hot press forming are performed by adopting a dipping equipment continuous dipping drying hot press forming method. The mesh cloth is firstly soaked in PAA by a gumming tank, the PAA concentration is 1-30 percent, the gumming time is 5-60 s, preferably 10 percent and 10s; then, redundant slurry on the grid cloth is filtered and pressed into a slurry tank through a slurry filtering roller, so that the slurry is saved; then sequentially passes through a belt pulley, a hot pressing plate, a cutting device and a net collecting device.
Consider thick liquid roller promptly mudjacking rod, the upper wheel is the rubber wheel, the lower round is the stainless steel wheel, through applying certain pressure to the upper roll and causing upper and lower roller extrusion net cloth, rubber is considered thick liquid roller and is favorable to abundant filter-pressing to go up unnecessary PAA on the net cloth.
The belt pulley is a conveying belt with chains on two sides, the width of the two sides can be adjusted, and a plurality of rows of upright rivets are fixed on the conveying belt, so that the shaping width of the mesh cloth can be fixed. The hot pressing temperature can reach room temperature to 500 ℃, the pressure is 0 to 30MPa, preferably 400 ℃, and 10MPa; the hot pressing plate has two main functions, namely drying the gridding cloth to finish shaping the gridding cloth; and secondly, the node positions of the mesh cloth are bonded together by the PAA in the pressurizing process, so that the phenomenon of fiber breakage in the cutting process is prevented.
And cutting the mesh cloth into mesh cloth with a certain width by adopting a high-speed rotating cutter at the position of the belt pulley outlet.
The step 4) of carrying out high-temperature treatment on the shaped mesh cloth, wherein the high-temperature condition is 300 ℃ for 4 hours, and aims to carry out hot cyclization on the PAA coated on the surface of the mesh cloth, so that the stability of the mesh cloth is further improved.
The mesh cloth prepared by the invention can resist the high temperature of 300 ℃ for a long time and keep the shape unchanged.
The invention has the beneficial effects that:
1) Before the grid cloth is prepared, the surface of the polyimide fiber is treated, and a thin epoxy slurry film is formed on the surface of the polyimide fiber, so that the wear resistance and bundling property of the fiber are improved, the subsequent interface combination with other materials of the grid cloth is not influenced, and the weaving efficiency and the forming rate are improved. The invention adopts weak cation epoxy with amino to prepare epoxy slurry: firstly, negative electricity generated on the surface of the fiber in the weaving process is removed, and secondly, the introduction of amino groups is beneficial to later surface modification of the mesh cloth.
2) After the grid cloth is woven, the PAA coating and the hot-press shaping are carried out by adopting a gum dipping device continuous dipping drying hot-press shaping method, wherein the PAA coating is carried out for improving the bundling property of fibers and facilitating the cutting of the grid cloth, and the hair is not dropped in the cutting process. Without PAA, the scrim would be uneven and difficult to cut. The grid cloth can be dried by adopting the hot press plate, so that the grid cloth is shaped, and the PAA bonds the node positions of the grid cloth together in the pressurizing process, thereby further preventing the phenomenon of broken fibers in the cutting process.
3) After the shaped mesh cloth is subjected to high-temperature treatment, the PAA coated on the surface of the mesh cloth is subjected to hot cyclization, so that the stability of the mesh cloth is further improved. The prepared mesh fabric can resist the high temperature of 300 ℃ for a long time and keep the shape unchanged.
4) The grid cloth prepared by the invention overcomes the defects that the polyimide grid cloth is easy to curl, difficult to shape and cutThe process is easy to break the fiber, the dimensional stability and the high-temperature stability are improved, and the shrinkage rate and the areal density of the PI mesh fabric are reduced. The density of the grid cloth cover prepared by adopting 200D fiber and the method of the invention is 10-20g/m 2 。
Drawings
FIG. 1 is a schematic view of a continuous shaping process of polyimide mesh cloth according to the present invention;
FIG. 2 is a plan view of the polyimide mesh fabric continuous sizing process of the present invention;
FIG. 3 shows a polyimide scrim prepared in example 1 of the present invention
Detailed Description
The invention relates to a continuous shaping process of polyimide mesh cloth.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
With reference to the attached figures 1-3,
1. the net releasing equipment is specifically a cloth releasing frame and is used for releasing the grid cloth out of the creel;
2. glue dipping tank
3. Glass cover capable of reducing volatilization of solution
4. Squeezing roller
5. The overflow trough can save solution
6. A belt pulley for conveying the mesh cloth and simultaneously adjusting the width of the mesh cloth
7. Hot press plate for heat setting of mesh cloth
8. A cutting device for cutting the mesh cloth into a fixed width
9. Net collecting equipment, in particular to a cloth collecting frame for collecting and winding grid cloth
10. Cloth guide wheel for fixing grid cloth
11. A mesh pressing brush for pressing mesh cloth on the rivet
Example 1:
preparation of epoxy slurry: aminoethanesulfonic acid is adopted to react with epoxy and then is combined with weak acid to generate weak cation aqueous epoxy emulsion.
Preparing polyimide mesh cloth;
soaking polyimide fibers in 5% epoxy slurry for 10s, and coating a thin layer of epoxy slurry on the surfaces of the polyimide fibers;
weaving polyimide fibers into polyimide gridding cloth, and placing the polyimide gridding cloth on the cloth placing frame 1;
PAA coating and hot-press shaping are carried out by adopting a continuous dipping drying hot-press shaping method: soaking the polyimide mesh fabric in PAA with the mass concentration of 10% in a dipping tank 2 for 10s for coating; then applying 6MPa pressure through a mudjacking roller 4, and carrying out filter pressing on redundant serous fluid on the gridding cloth to an overflow groove 5;
the mesh cloth is conveyed through a belt pulley 6, the width of the mesh cloth is adjusted at the same time, the mesh cloth is drawn to a fixed length, the hot pressing temperature of a hot pressing plate 7 is 400 ℃, and the pressure is 10MPa;
then, a cutter rotating at a high speed in the cutting equipment 8 cuts the mesh cloth into mesh cloth with a certain width, and the mesh cloth enters the mesh collecting equipment 9 for collecting meshes after being cut; and (4) treating the shaped and cut mesh fabric at the high temperature of 300 ℃ for 4h.
No curling in the preparation process, no broken fiber in the cutting process, easy shaping, and the prepared grid cloth cover density of 19g/m 2 The thickness is 0.43mm, and the product can resist 300 ℃ high temperature for a long time and keep the shape unchanged.
Example 2:
preparation of epoxy slurry: aminoethanesulfonic acid is adopted to react with epoxy and then is combined with weak acid to generate weak cation waterborne epoxy emulsion.
Preparing polyimide mesh cloth;
soaking polyimide fibers in 5% epoxy slurry for 10s, and coating a thin layer of epoxy slurry on the surfaces of the polyimide fibers;
weaving polyimide fibers into polyimide gridding cloth, and placing the polyimide gridding cloth on the cloth placing frame 1;
PAA coating and hot-press shaping are carried out by adopting a continuous dipping drying hot-press shaping method: soaking polyimide gridding cloth in a steeping vat 2 in PAA with the concentration of 10% for 10s for coating; then applying 2MPa pressure through a mud jacking roller 4;
conveying the mesh cloth through a belt pulley 6, adjusting the width of the mesh cloth at the same time, drawing the mesh cloth into a fixed length, and controlling the hot-pressing temperature of a hot-pressing plate 7 to be 400 ℃ and the pressure to be 10MPa;
then, a cutter rotating at a high speed in the cutting equipment 8 cuts the mesh cloth into mesh cloth with a certain width, and the cut mesh cloth enters the mesh collecting equipment 9 for mesh collection; and (4) treating the shaped and cut mesh fabric at the high temperature of 300 ℃ for 4h.
No curling in the preparation process, no broken fiber in the cutting process, easy shaping, and the cloth cover density of the prepared grid is 19g/m 2 The thickness is 0.55mm, and the product can resist 300 ℃ high temperature for a long time and keep the shape unchanged.
Example 3:
preparation of epoxy slurry: the method adopts ethylenediamine and epoxy to react, and then combines with weak acid to generate weak cationic waterborne epoxy emulsion.
Preparing polyimide mesh cloth;
soaking polyimide fibers in 5% epoxy slurry for 10s, and coating a thin layer of epoxy slurry on the surfaces of the polyimide fibers;
weaving polyimide fibers into polyimide gridding cloth, and placing the polyimide gridding cloth on the cloth placing frame 1;
PAA coating and hot-press shaping are carried out by adopting a continuous dipping drying hot-press shaping method: soaking the polyimide mesh fabric in 10% PAA in a dipping tank 2 for 10s for coating; then applying 6MPa pressure through a mud jacking roller 4, and carrying out filter pressing on the redundant serous fluid on the gridding cloth to an overflow groove 5;
the mesh cloth is conveyed through a belt pulley 6, the width of the mesh cloth is adjusted at the same time, the mesh cloth is drawn to a fixed length, the hot pressing temperature of a hot pressing plate 7 is 400 ℃, and the pressure is 10MPa;
then, a cutter rotating at a high speed in the cutting equipment 8 cuts the mesh cloth into mesh cloth with a certain width, and the mesh cloth enters the mesh collecting equipment 9 for collecting meshes after being cut; and (3) carrying out high-temperature treatment on the shaped and cut mesh fabric for 4 hours at the temperature of 300 ℃.
No curling in the preparation process, no broken fiber in the cutting process, easy shaping, and the cloth cover density of the prepared grid is 19g/m 2 The thickness is 0.43mm, and the product can resist 300 ℃ high temperature for a long time and keep the shape unchanged.
Comparative example 1:
the procedure was the same as in example 1 except that the polyimide fibers were not impregnated with the epoxy slurry.
In the process of preparing the mesh fabric, fibers are easy to fuzz, and the accumulated hair balls cause weaving holes, so that the quality is influenced, and the mesh fabric cannot be smoothly woven and formed.
Comparative example 2:
the procedure was the same as in example 1, except that no PAA impregnation was performed.
The prepared mesh cloth is difficult to shape, even if the shaping is realized, the temperature resistance of the mesh cloth is low, the integral temperature resistance of the mesh cloth is influenced, and the high-temperature requirement of a special field cannot be met.
Claims (3)
1. A preparation method of polyimide mesh cloth is characterized in that,
the apparatus used comprises: the device comprises a net releasing device, a glue dipping tank, a glass cover, a mud jacking roller, an overflow tank, a belt pulley, a hot pressing plate, a cutting device, a net collecting device, a cloth guide wheel and a net pressing brush;
the preparation method comprises the following steps:
step 1), treating the surface of polyimide fiber;
in the step 1), the method for treating the surface of the polyimide fiber comprises the following steps: soaking polyimide fiber in epoxy slurry, and coating a layer of epoxy slurry on the surface of the polyimide fiber; the concentration of the epoxy grout is 1-10%, and the grout dipping time is 5-60 s;
the preparation method of the epoxy slurry comprises the following steps: reacting an amino-containing compound with epoxy, and combining the amino-containing compound with weak acid to generate weak cationic aqueous epoxy emulsion; the compound containing amino is one or two of aminoethanesulfonic acid and ethylenediamine;
step 2), weaving the polyimide fibers subjected to surface treatment in the step 1) into polyimide mesh cloth, and placing the polyimide mesh cloth on net placing equipment, wherein the net placing equipment is a cloth placing frame;
step 3), performing polyamide acid coating, hot-pressing and shaping, cutting and net winding on the polyimide mesh cloth woven in the step 2);
in the step 3), a continuous dipping, drying, hot-pressing and shaping method is adopted for polyamide acid coating and hot-pressing and shaping, and the method specifically comprises the following steps: soaking the woven polyimide mesh fabric in 10% of polyamic acid for 10s in a dipping tank for coating;
applying 6MPa pressure by a filtering slurry roller, and carrying out filter pressing on the redundant slurry on the grid cloth to an overflow groove;
conveying the mesh cloth through a belt pulley, adjusting the width of the mesh cloth at the same time, and drawing the mesh cloth to a fixed length;
passing through a hot pressing plate, wherein the hot pressing plate is used for heat setting of the mesh cloth;
at the position of the belt pulley outlet, a cutter rotating at a high speed in cutting equipment cuts the mesh cloth into mesh cloth with a certain width, and the mesh cloth enters mesh collecting equipment for mesh collection after being cut;
the upper wheel is a rubber wheel, the lower wheel is a stainless steel wheel, the upper roller and the lower roller extrude the gridding cloth by applying certain pressure on the upper roller, and the rubber slurry filtering roller is beneficial to fully filter and press redundant polyamide acid on the gridding cloth;
the belt pulley is a conveying belt with chains on two sides, the width of the two sides can be adjusted, and a plurality of rows of upright rivets are fixed on the conveying belt so as to fix the shaping width of the mesh cloth;
the hot pressing plate is used for drying the mesh cloth, so that the mesh cloth is shaped, polyamide acid is used for bonding the node positions of the mesh cloth together in the pressurizing process, and the phenomenon of fiber breakage in the cutting process is avoided;
step 4), performing high-temperature treatment on the polyimide mesh fabric which is shaped and cut in the step 3);
in the step 4), the conditions for performing high-temperature treatment on the cut polyimide mesh cloth are as follows: and (4) carrying out high-temperature treatment for 4h at the temperature of 300 ℃, and carrying out thermal cyclization on the polyamic acid coated on the surface of the mesh fabric.
2. The method for preparing the polyimide mesh fabric according to claim 1, wherein the hot-pressing temperature of the hot-pressing plate is between room temperature and 500 ℃, and the pressure is between 0 and 30MPa.
3. The method for preparing polyimide mesh fabric according to claim 2, wherein the hot-pressing temperature of the hot-pressing plate is 400 ℃ and the pressure is 10MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110004256.XA CN112779783B (en) | 2021-01-04 | 2021-01-04 | Preparation method of polyimide mesh fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110004256.XA CN112779783B (en) | 2021-01-04 | 2021-01-04 | Preparation method of polyimide mesh fabric |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112779783A CN112779783A (en) | 2021-05-11 |
| CN112779783B true CN112779783B (en) | 2023-04-07 |
Family
ID=75753824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110004256.XA Active CN112779783B (en) | 2021-01-04 | 2021-01-04 | Preparation method of polyimide mesh fabric |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112779783B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113584708B (en) * | 2021-08-03 | 2022-12-02 | 江苏先诺新材料科技有限公司 | Ultra-low-density polyimide fiber mesh cloth and preparation method thereof |
| CN114163669B (en) * | 2021-09-26 | 2024-07-05 | 江苏先诺新材料科技有限公司 | Polyimide fiber grid reinforced polyimide composite film and preparation method and application thereof |
| CN113930914A (en) * | 2021-10-13 | 2022-01-14 | 南通市法博纤维织造有限公司 | Gum dipping, tentering and shaping method of mesh fabric |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104448245A (en) * | 2014-12-16 | 2015-03-25 | 北京光华纺织集团有限公司 | Preparation method of hyper-branched epoxy emulsion |
| CN105064038A (en) * | 2015-08-24 | 2015-11-18 | 江苏先诺新材料科技有限公司 | Method for preparing water-soluble polyimide sizing agent for polyimide fiber and application thereof |
| CN105504810A (en) * | 2016-01-07 | 2016-04-20 | 江苏先诺新材料科技有限公司 | Method for preparing high-intensity and high-modulus polyimide-fiber-reinforced polyimide sheet through continuous forming |
| CN107914405A (en) * | 2016-10-05 | 2018-04-17 | 台湾日邦树脂股份有限公司 | Method for producing polyimide composite material |
| CN108950854A (en) * | 2018-08-03 | 2018-12-07 | 江苏先诺新材料科技有限公司 | A kind of high-strength wearable type polyimide fiber rope band and preparation method thereof |
| CN110273209A (en) * | 2019-07-03 | 2019-09-24 | 江苏先诺新材料科技有限公司 | A kind of high-strength fire-retarding high temperature resistant type polyimides yarn and preparation method thereof |
-
2021
- 2021-01-04 CN CN202110004256.XA patent/CN112779783B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104448245A (en) * | 2014-12-16 | 2015-03-25 | 北京光华纺织集团有限公司 | Preparation method of hyper-branched epoxy emulsion |
| CN105064038A (en) * | 2015-08-24 | 2015-11-18 | 江苏先诺新材料科技有限公司 | Method for preparing water-soluble polyimide sizing agent for polyimide fiber and application thereof |
| CN105504810A (en) * | 2016-01-07 | 2016-04-20 | 江苏先诺新材料科技有限公司 | Method for preparing high-intensity and high-modulus polyimide-fiber-reinforced polyimide sheet through continuous forming |
| CN107914405A (en) * | 2016-10-05 | 2018-04-17 | 台湾日邦树脂股份有限公司 | Method for producing polyimide composite material |
| CN108950854A (en) * | 2018-08-03 | 2018-12-07 | 江苏先诺新材料科技有限公司 | A kind of high-strength wearable type polyimide fiber rope band and preparation method thereof |
| CN110273209A (en) * | 2019-07-03 | 2019-09-24 | 江苏先诺新材料科技有限公司 | A kind of high-strength fire-retarding high temperature resistant type polyimides yarn and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112779783A (en) | 2021-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112779783B (en) | Preparation method of polyimide mesh fabric | |
| CN104924487B (en) | The preparation system and preparation method of a kind of thermoplasticity carbon fiber prepreg | |
| CN109629085B (en) | Graphene conductive fabric with space three-dimensional network structure, and preparation method and application thereof | |
| CN110079872B (en) | Preparation method of wide-width high-strength high-modulus polyethylene fiber | |
| CN1018347B (en) | Chemical fibre sheet, and its producing method and qpparatus | |
| CN104246049B (en) | The electronic-grade glass fiber cloth of electronic-grade glass fiber cloth flaky process technique and production thereof | |
| EP0182116B1 (en) | Surface trated metallic filaments | |
| CN203411790U (en) | Sizing device for polyacrylonitrile carbon fibers | |
| CN111016344B (en) | High-water-absorption high-strength composite non-woven fabric | |
| CN118125728A (en) | Glass fiber cloth and preparation method thereof | |
| CN111890595A (en) | A system and preparation method of composite infiltration thermoplastic carbon fiber prepreg fabric | |
| CN105239399A (en) | Bamboo fiber coated with polyvinyl acetate and preparation method of bamboo fiber | |
| CN214215085U (en) | Production line of double-layer weftless fabric | |
| KR102024505B1 (en) | High performance dust filter for iron oxides and its manufacturing technology for hrsg | |
| CN112793284B (en) | Production process and production line of double-layer weftless fabric | |
| CN117774370A (en) | Preparation method of thermoplastic composite materials suitable for automatic laying and in-situ consolidation process | |
| CN216074338U (en) | Continuous stable setting device of polyimide net cloth | |
| CN115948935A (en) | A kind of high temperature resistant carbon fiber paper, honeycomb core material and preparation method thereof | |
| CN113209719A (en) | Glass fiber film-coated filter cloth and manufacturing method thereof | |
| CN113279243A (en) | Preparation equipment and preparation method for novel composite fiber for aerial work | |
| CN221794058U (en) | Ultrathin high-strength wear-resistant waterproof fabric | |
| CN118599165A (en) | A stab-proof composite material based on aramid fiber and preparation method thereof | |
| CN100366423C (en) | Inorganic wet curtain and preparation method thereof | |
| CN117246006B (en) | A high-strength, high-temperature resistant quartz cloth honeycomb core and its preparation method | |
| CN112359490B (en) | Preparation method of PTFE and PPS composite high-temperature-resistant filter material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |