CN113402845B - Room temperature curing glass fiber weftless binding tape special for kerosene vapor phase drying and preparation method thereof - Google Patents
Room temperature curing glass fiber weftless binding tape special for kerosene vapor phase drying and preparation method thereof Download PDFInfo
- Publication number
- CN113402845B CN113402845B CN202110639276.4A CN202110639276A CN113402845B CN 113402845 B CN113402845 B CN 113402845B CN 202110639276 A CN202110639276 A CN 202110639276A CN 113402845 B CN113402845 B CN 113402845B
- Authority
- CN
- China
- Prior art keywords
- parts
- weftless
- room temperature
- glass fiber
- binding tape
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Reinforced Plastic Materials (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention provides a room temperature curing glass fiber weftless binding tape special for kerosene vapor phase drying, which comprises the following components, by weight, 100 parts of epoxy resin, 12-15 parts of liquid nitrile rubber, 20-25 parts of polyvinyl formal, 40-50 parts of acetone, 10-15 parts of alumina powder, 1-2 parts of nano alumina, 0.5-2 parts of light calcium carbonate, 0.5-1.5 parts of kaolin, 0.1-0.5 part of fumed silica, 1.5-3 parts of zinc stearate, 0.2-0.3 part of 2-methyl-4-ethylimidazole and 1.5-2 parts of 2,4, 6-tris (dimethylaminomethyl) phenol. According to the room temperature curing glass fiber weftless binding tape special for kerosene vapor phase drying and the preparation method thereof, kaolin and fumed silica are added, so that the adhesive has extremely excellent thixotropy, the prepared room temperature curing weftless binding tape does not drip adhesive in the binding process and the curing process, the room temperature curing weftless binding tape does not adhere after being heated, and light calcium carbonate is added into the raw materials, so that no matter before or after curing, the room temperature curing weftless binding tape does not have powder falling off in the using process.
Description
Technical Field
The invention relates to the technical field of composite insulating materials, in particular to a room-temperature-cured glass fiber weftless binding tape special for kerosene gas phase drying and a preparation method thereof.
Background
The traditional weftless tape is a tape-shaped insulating binding material with a certain width, which is formed by impregnating high-temperature-resistant thermosetting unsaturated polyester resin with processed unidirectionally-arranged continuous twisted alkali-free glass fiber yarns.
In the 80s of about 20 th century, most transformer manufacturing companies introduce a kerosene vapor phase drying process, the process is to move a transformer body into a kerosene vapor phase drying furnace at the furnace temperature of 60 ℃ after iron core binding is finished, atomized kerosene is sprayed after 1-2h, the whole resin is not resistant to kerosene elution because the traditional weftless belt is not crosslinked, and after the kerosene vapor phase drying furnace is used for a long time, the resin eluted by the kerosene forms colloidal particles to cause oil circuit blockage, equipment pollution and production accidents; at present, the solutions of transformer manufacturers are to clean kerosene pipelines, valves and kerosene tanks after drying products, and to periodically replace kerosene, so that the operation is complicated, the labor intensity is high, and the maintenance cost is extremely high.
Disclosure of Invention
The invention aims to overcome and supplement the defects in the prior art, and provides a room-temperature-cured glass fiber weftless binding tape special for kerosene vapor phase drying and a preparation method thereof. The technical scheme adopted by the invention is as follows:
the room temperature curing glass fiber weftless binding tape special for kerosene vapor drying comprises the following components in parts by weight:
100 parts of epoxy resin, 12-15 parts of liquid nitrile rubber, 20-25 parts of polyvinyl formal, 40-50 parts of acetone, 10-15 parts of alumina powder, 1-2 parts of nano alumina, 0.5-2 parts of light calcium carbonate, 0.5-1.5 parts of kaolin, 0.1-0.5 part of fumed silica, 1.5-3 parts of zinc stearate, 0.2-0.3 part of 2-methyl-4-ethylimidazole and 1.5-2 parts of 2,4, 6-tris (dimethylaminomethyl) phenol.
Preferably, the room temperature curing glass fiber weftless binding tape special for kerosene gas phase drying is provided, wherein: also comprises 3-4.5 parts of 2-methylimidazole.
Preferably, the room temperature curing glass fiber weftless binding tape special for kerosene gas phase drying is provided, wherein: also comprises 3-4 parts of phenolic aldehyde amine.
A preparation method of room temperature curing glass fiber weftless binding tape special for kerosene vapor drying comprises the following steps: the method comprises the following steps:
s1, putting 100 parts by weight of epoxy resin, 20-25 parts by weight of polyvinyl formal, 12-15 parts by weight of liquid nitrile rubber and 12-15 parts by weight of acetone into a reaction kettle, heating to 25-50 ℃ to dissolve, and keeping the temperature for 10-20 min to obtain a mixture;
s2, adding 10-15 parts of alumina powder, 1-2 parts of nano alumina, 0.5-2 parts of light calcium carbonate, 0.5-1.5 parts of kaolin, 0.1-0.5 part of fumed silica and 1.5-3 parts of zinc stearate into the mixture, and stirring at 30-40 ℃ for 30-120 min to obtain a glue solution;
s3, cooling the glue solution to 8-10 ℃, adding 0.2-0.3 part of 2-methyl-4-ethylimidazole, 3-4 parts of phenol aldehyde amine, 1.5-2 parts of 2,4, 6-tris (dimethylaminomethyl) phenol and 3-4.5 parts of 2-methylimidazole, and stirring for 5-60 min to obtain the adhesive;
s4, soaking and coating the adhesive on the alkali-free glass fiber yarns at 15-20 ℃, removing part of the solvent from the alkali-free glass fiber yarns soaked with the adhesive at room temperature, and drying in the air for 10-30 s for primary shaping to obtain the weftless tape;
s5, carrying out air cooling drying on the preliminarily shaped weftless tape to remove the residual solvent;
s6, rolling and packaging the solvent-removed non-woven tape, and putting the non-woven tape into a freezer to obtain a finished product.
Preferably, the preparation method of the room temperature cured glass fiber weftless binding tape special for kerosene vapor phase drying comprises the following steps: and the stirring speed of the step S2 is 40-120 r/min.
Preferably, the preparation method of the room temperature cured glass fiber weftless binding tape special for kerosene vapor phase drying comprises the following steps: and the stirring speed of the step S3 is 40-150 r/min.
Preferably, the room temperature curing glass fiber specially used for kerosene gas phase dryingA method for preparing a weftless binding tape, wherein: the air-cooled drying in the step S5 is to change the ventilation volume to 60-150 h/m 3 The air cooling drying time is 120-200 s.
The invention has the advantages that:
according to the room temperature curing glass fiber weftless binding tape special for kerosene vapor phase drying and the preparation method thereof, kaolin and fumed silica are added, so that an adhesive has extremely excellent thixotropy, the prepared room temperature curing weftless tape does not drip during curing, does not stick after being heated, light calcium carbonate is added into raw materials, and during the use process, no matter before and after curing, the room temperature curing weftless binding tape does not have powder falling, zinc stearate with an appropriate proportion is added, so that the prepared room temperature curing weftless binding tape has excellent uncoiling capability, and the phenomenon that the adhesive cannot be uncoiled due to bonding is avoided.
Detailed Description
The present invention is further illustrated by the following examples.
Example 1
A room temperature curing glass fiber weftless binding tape special for kerosene vapor phase drying comprises the following components in parts by weight:
100 parts of epoxy resin, 13 parts of liquid nitrile rubber, 22 parts of polyvinyl formal, 40 parts of acetone, 11 parts of alumina powder, 1.1 parts of nano alumina, 1.7 parts of light calcium carbonate, 1 part of kaolin, 0.3 part of fumed silica, 3 parts of zinc stearate, 0.2 part of 2-methyl-4-ethylimidazole, 3.1 parts of phenolic amine, 1.6 parts of 2,4, 6-tris (dimethylaminomethyl) phenol and 3.5 parts of 2-methylimidazole.
A preparation method of a room temperature curing glass fiber weftless binding tape special for kerosene vapor phase drying is disclosed, wherein: the method comprises the following steps:
s1, putting 100 parts of epoxy resin, 22 parts of polyvinyl formal, 13 parts of liquid nitrile rubber and 40 parts of acetone into a reaction kettle, heating to 40 ℃ to dissolve, and keeping the temperature for 10min to obtain a mixture;
s2, adding 11 parts of alumina powder, 1.1 parts of nano alumina, 1.7 parts of light calcium carbonate, 1 part of kaolin, 0.3 part of fumed silica and 3 parts of zinc stearate into the mixture, and stirring at 40 ℃ for 75min at the rotating speed of 60 revolutions per minute to obtain a glue solution;
s3, cooling the glue solution to 10 ℃ by using a water cooling device, adding 0.2 part of 2-methyl-4-ethylimidazole, 3.1 parts of phenol aldehyde amine, 1.6 parts of 2,4, 6-tris (dimethylaminomethyl) phenol and 3.5 parts of 2-methylimidazole, stirring for 20min, and rotating at the speed of 120 r/min to obtain the adhesive;
s4, soaking and coating the adhesive on the alkali-free glass fiber yarns at 15 ℃, removing part of the solvent from the alkali-free glass fiber yarns soaked with the adhesive at room temperature, and drying in the air for 30s for primary shaping to obtain the weftless tape;
s5, air-cooling and drying the preliminarily shaped weftless tape to remove residual solvent, wherein the ventilation volume is 150h/m 3 The air-cooled drying time was 125s.
S6, rolling and packaging the solvent-removed non-woven tape, and putting the non-woven tape into a freezer to obtain a finished product.
Example 2
The room temperature curing glass fiber weftless binding tape special for kerosene vapor drying comprises the following components in parts by weight:
100 parts of epoxy resin, 14.5 parts of liquid nitrile rubber, 25 parts of polyvinyl formal, 45 parts of acetone, 14.5 parts of alumina powder, 2 parts of nano alumina, 0.9 part of light calcium carbonate, 1.5 parts of kaolin, 0.5 part of fumed silica, 2 parts of zinc stearate, 0.2 part of 2-methyl-4-ethylimidazole, 3.0 parts of phenolic amine, 1.5 parts of 2,4, 6-tris (dimethylaminomethyl) phenol and 4.5 parts of 2-methylimidazole.
A preparation method of room temperature curing glass fiber weftless binding tape special for kerosene vapor drying comprises the following steps: the method comprises the following steps:
s1, adding 100 parts of epoxy resin, 25 parts of polyvinyl formal, 45 parts of liquid nitrile rubber and 45 parts of acetone into a reaction kettle, heating to 40 ℃ to dissolve, and keeping the temperature for 10min to obtain a mixture;
s2, adding 14.5 parts of alumina powder, 2 parts of nano alumina, 0.9 part of light calcium carbonate, 1.5 parts of kaolin, 0.5 part of fumed silica and 2 parts of zinc stearate into the mixture, and stirring at 40 ℃ for 75min at the rotating speed of 60 revolutions per minute to obtain a glue solution;
s3, cooling the glue solution to 10 ℃ by using a water cooling device, adding 0.2 part of 2-methyl-4-ethylimidazole, 3.0 parts of phenol aldehyde amine, 1.5 parts of 2,4, 6-tris (dimethylaminomethyl) phenol and 4.5 parts of 2-methylimidazole, stirring for 20min, and rotating at the speed of 120 r/min to obtain the adhesive;
s4, impregnating the adhesive at 12 ℃ and coating the adhesive on the alkali-free glass fiber yarns, removing part of the solvent from the alkali-free glass fiber yarns impregnated with the adhesive at room temperature, and drying in the air for 30s for primary shaping to obtain the weftless tape;
s5, carrying out air cooling drying on the preliminarily shaped weftless tape to remove residual solvent, wherein the ventilation rate is 140h/m 3 The air-cooled drying time was 180s.
S6, rolling and packaging the solvent-removed weftless tape, and putting the weftless tape into a freezer to obtain a finished product.
Example 3
A room temperature curing glass fiber weftless binding tape special for kerosene vapor phase drying comprises the following components in parts by weight:
100 parts of epoxy resin, 13.5 parts of liquid nitrile rubber, 20 parts of polyvinyl formal, 50 parts of acetone, 10.5 parts of alumina powder, 1.2 parts of nano alumina, 1.9 parts of light calcium carbonate, 1.3 parts of kaolin, 0.2 part of fumed silica, 1.92 parts of zinc stearate, 0.24 part of 2-methyl-4-ethylimidazole, 4.0 parts of phenolic aldehyde amine, 2 parts of 2,4, 6-tris (dimethylaminomethyl) phenol and 4.1 parts of 2-methylimidazole.
A preparation method of room temperature curing glass fiber weftless binding tape special for kerosene vapor drying comprises the following steps: the method comprises the following steps:
s1, putting 100 parts of epoxy resin, 20 parts of polyvinyl formal, 13.5 parts of liquid nitrile rubber and 50 parts of acetone into a reaction kettle, heating to 50 ℃ to dissolve, and keeping the temperature for 10min to obtain a mixture;
s2, adding 10.5 parts of alumina powder, 1.2 parts of nano alumina, 1.9 parts of light calcium carbonate, 1.3 parts of kaolin, 0.2 part of fumed silica and 1.92 parts of zinc stearate into the mixture, and stirring at 40 ℃ for 75min at the rotating speed of 60 revolutions per minute to obtain a glue solution;
s3, cooling the glue solution to 8 ℃ by using a water cooling device, adding 0.24 part of 2-methyl-4-ethylimidazole, 4.0 parts of phenol aldehyde amine, 2 parts of 2,4, 6-tris (dimethylaminomethyl) phenol and 4.1 parts of 2-methylimidazole, stirring for 20min, and rotating at the speed of 120 r/min to obtain the adhesive;
s4, impregnating the adhesive at 9 ℃ and coating the adhesive on the alkali-free glass fiber yarns, removing part of solvent from the alkali-free glass fiber yarns impregnated with the adhesive at room temperature, and drying in the air for 30s for primary shaping to obtain the weftless tape;
s5, air-cooling and drying the preliminarily shaped weftless tape to remove residual solvent, wherein the ventilation volume is 150h/m 3 The air-cooled drying time was 200s.
S6, rolling and packaging the solvent-removed weftless tape, and putting the weftless tape into a freezer to obtain a finished product.
The finished weftless banding strips of examples 1-3 were taken for experimental testing:
1. shearing a weftless binding tape to 50MM × 200MM long, and observing whether powder falls off in the weftless binding tape during uncoiling;
2. isolating the front surface and the back surface of the weftless binding tape by using polytetrafluoroethylene films (the trade name is Teflon 0.5MM thick);
3. the prepared weftless binding tape is weighed after being solidified for 36H at room temperature, data is recorded, the weftless binding tape is put into a kerosene gas phase drying furnace for carrying out kerosene gas phase drying process, a sample piece after kerosene gas phase drying treatment is taken out and placed at room temperature, and the sample piece is cooled to the room temperature for carrying out weight loss detection;
4. winding a weftless binding tape between two metal cylinders with the diameter of 50MM and wrapped by Teflon, wherein the metal cylinders have two mounting plates with fixed distance and the center distance of 260MM, winding a single layer, preparing an oval sample piece, and standing for 24 hours;
5. placing the laid binding belt, the metal cylinder and the fixing plate into a drying box, starting the drying box to heat and raise the temperature, raising the temperature to 60 ℃, preserving the heat for 2 hours, and curing at the temperature raising rate of 5 ℃/min;
6. and taking out the cured weftless binding tape, placing the cured weftless binding tape at room temperature, and cooling the cured weftless binding tape to the room temperature for tensile strength test.
The test results are shown in table 1:
TABLE 1
Remarking: according to the same detection method and the same detection instrument, the weight loss rate of a certain brand weftless binding tape sold in the market is 9.5%, the average value of the tensile strength is 862KG, and through analysis, before kerosene gas phase drying process oil injection, the traditional weftless binding tape can not be cured, so that the binding force is insufficient, and the equipment is polluted by kerosene eluting resin.
The room temperature curing characteristics of the invention are as follows: before the room-temperature-cured weftless binding tape is moved into a kerosene gas phase drying furnace, the room-temperature-cured weftless binding tape has a certain crosslinking degree, and after the room-temperature-cured weftless binding tape is placed at 60 ℃ for 2 hours, the crosslinking degree is further increased, the room-temperature-cured weftless binding tape is difficult to elute by a kerosene gas phase drying process, kerosene gas phase drying equipment is not polluted, and falling colloidal particles block an equipment oil path.
According to the room temperature curing glass fiber weftless binding tape special for kerosene vapor phase drying and the preparation method thereof, kaolin and fumed silica are added, so that an adhesive has extremely excellent thixotropy, the prepared room temperature curing weftless binding tape does not drip during curing, and does not stick after being heated, light calcium carbonate with an appropriate mark is added into raw materials, and during the use process, no matter before and after curing, the room temperature curing weftless binding tape does not have powder falling, zinc stearate with an appropriate proportion is added, so that the prepared room temperature curing weftless binding tape has excellent uncoiling capability, and the phenomenon that the adhesive cannot be uncoiled due to binding can not occur.
The room temperature curing glass fiber weftless binding tape special for kerosene gas phase drying and the preparation method thereof have white appearance, no latitude line, room temperature curing capability, higher crosslinking degree condition of 60 ℃ for 2 hours, kerosene gas phase drying process can further improve the crosslinking degree until the crosslinking degree is completely crosslinked, the kerosene gas phase drying weight loss rate is extremely low, no glue flows in the curing process, no powder falling occurs before and after curing, and the room temperature curing glass fiber weftless binding tape is applied to iron core binding of a dry type/oil immersed transformer and is used for tightening and binding an iron core column part.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (5)
1. The room temperature curing glass fiber weftless binding tape special for kerosene vapor drying is characterized by comprising the following components in parts by weight:
100 parts of epoxy resin, 12-15 parts of liquid nitrile rubber, 20-25 parts of polyvinyl formal, 40-50 parts of acetone, 10-15 parts of alumina powder, 1-2 parts of nano alumina, 0.5-2 parts of light calcium carbonate, 0.5-1.5 parts of kaolin, 0.1-0.5 part of fumed silica, 1.5-3 parts of zinc stearate, 0.2-0.3 part of 2-methyl-4-ethylimidazole, 1.5-2 parts of 2,4, 6-tris (dimethylaminomethyl) phenol, 3-4.5 parts of 2-methylimidazole and 3-4 parts of phenalkamine.
2. The preparation method of the room temperature curing glass fiber weftless binding tape special for kerosene vapor phase drying as claimed in claim 1, characterized in that: the method comprises the following steps:
s1, putting epoxy resin, polyvinyl formal, liquid nitrile rubber and acetone into a reaction kettle, heating to 25-50 ℃, dissolving, and keeping the temperature for 10-20 min to obtain a mixture;
s2, adding alumina powder, nano alumina, light calcium carbonate, kaolin, fumed silica and zinc stearate into the mixture, and stirring for 30-120 min at 30-40 ℃ to obtain a glue solution;
s3, cooling the glue solution to 8-10 ℃, adding 2-methyl-4-ethylimidazole, phenol aldehyde amine, 2,4, 6-tri (dimethylaminomethyl) phenol and 2-methylimidazole, and stirring for 5-60 min to obtain the adhesive;
s4, impregnating the adhesive at 15-20 ℃ and coating the adhesive on the alkali-free glass fiber yarns, removing part of the solvent from the alkali-free glass fiber yarns impregnated with the adhesive at room temperature, and drying the alkali-free glass fiber yarns in the air for 10-30 s for primary shaping to obtain the weftless tape;
s5, carrying out air cooling drying on the preliminarily shaped weftless tape to remove the residual solvent;
s6, rolling and packaging the solvent-removed non-woven tape, and putting the non-woven tape into a freezer to obtain a finished product.
3. The preparation method of the room temperature curing glass fiber weftless binding tape special for kerosene vapor phase drying according to claim 2, characterized in that: and the stirring speed of the step S2 is 40-120 r/min.
4. The preparation method of the room temperature curing glass fiber weftless binding tape special for kerosene vapor phase drying as claimed in claim 2, characterized in that: and the stirring speed of the step S3 is 40-150 r/min.
5. The preparation method of the room temperature curing glass fiber weftless binding tape special for kerosene vapor phase drying according to claim 2, characterized in that: the air-cooled drying in the step S5 is carried out with the ventilation volume of 60-150 h/m 3 The air cooling drying time is 120-200 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110639276.4A CN113402845B (en) | 2021-06-08 | 2021-06-08 | Room temperature curing glass fiber weftless binding tape special for kerosene vapor phase drying and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110639276.4A CN113402845B (en) | 2021-06-08 | 2021-06-08 | Room temperature curing glass fiber weftless binding tape special for kerosene vapor phase drying and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113402845A CN113402845A (en) | 2021-09-17 |
| CN113402845B true CN113402845B (en) | 2022-12-13 |
Family
ID=77677084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110639276.4A Active CN113402845B (en) | 2021-06-08 | 2021-06-08 | Room temperature curing glass fiber weftless binding tape special for kerosene vapor phase drying and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113402845B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034377A (en) * | 1987-10-09 | 1989-08-02 | 上海耀华玻璃厂上海分厂 | The solvent impregnated resin of glass fiber winding tapes |
| CN1954024A (en) * | 2004-05-14 | 2007-04-25 | Cytec技术有限公司 | Self-adhesive prepreg |
| CN101958179A (en) * | 2010-09-14 | 2011-01-26 | 保定天威集团有限公司 | Method for mechanically binding and manually binding big transformer iron core |
| CN112457642A (en) * | 2020-11-19 | 2021-03-09 | 马继 | Special semi-conductive weftless tape for transformer binding and preparation method thereof |
-
2021
- 2021-06-08 CN CN202110639276.4A patent/CN113402845B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034377A (en) * | 1987-10-09 | 1989-08-02 | 上海耀华玻璃厂上海分厂 | The solvent impregnated resin of glass fiber winding tapes |
| CN1954024A (en) * | 2004-05-14 | 2007-04-25 | Cytec技术有限公司 | Self-adhesive prepreg |
| CN101958179A (en) * | 2010-09-14 | 2011-01-26 | 保定天威集团有限公司 | Method for mechanically binding and manually binding big transformer iron core |
| CN112457642A (en) * | 2020-11-19 | 2021-03-09 | 马继 | Special semi-conductive weftless tape for transformer binding and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113402845A (en) | 2021-09-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3960803A (en) | Flexible nontacky prepreg for bonding coils in high voltage devices and method of making said prepreg | |
| CN108303296B (en) | Sample preparation method for tensile property test of high-model carbon fiber multifilament | |
| JPS6035942A (en) | Method of processing electric winding | |
| CN107973925B (en) | Preparation method of epoxy glass cloth insulating cylinder | |
| CN113402845B (en) | Room temperature curing glass fiber weftless binding tape special for kerosene vapor phase drying and preparation method thereof | |
| CN113549301B (en) | Epoxy resin ultrahigh-thermal-conductivity insulating material and preparation method thereof | |
| CN114059349B (en) | Surface modification method for glass fiber tape, glass fiber tape and application thereof | |
| CN101615455A (en) | Vacuum glue-dipping insulation pipe without air gaps and manufacture method | |
| CN112735679A (en) | Preparation method of high-temperature-resistant self-adhesive flat enameled wire | |
| JPS61233011A (en) | Epoxy resin composition | |
| CN113583392B (en) | Normal-temperature in-situ repair material for drainage pipeline and construction method thereof | |
| CN112457642B (en) | Special semi-conductive weftless tape for transformer binding and preparation method thereof | |
| CN112063270A (en) | Enameled wire insulation impregnating varnish and preparation method and application thereof | |
| JPS58222516A (en) | Insulating and treating method for coil of electric apparatus | |
| CN112786262A (en) | F-grade mica tape with less glue, preparation method and application thereof | |
| US3687762A (en) | Method of making a void free filament wound article | |
| CA1214002A (en) | Method of sizing strand | |
| CN113035450B (en) | Production method of nitrogen-free environment-friendly electromagnetic wire and nitrogen-free environment-friendly electromagnetic wire | |
| CN110776852A (en) | Hot melt adhesive for low-temperature coating medical dialyzing paper | |
| CN109842992A (en) | A kind of production method of no glue single-face flexibility copper-clad board | |
| CN109454893A (en) | A kind of novel carbon fiber pipe processing technique | |
| CN115295246B (en) | Coating method of water-based self-adhesive polyesterimide enameled wire | |
| CN112175452B (en) | Motorcycle brake pedal and processing technology thereof | |
| CN116444768A (en) | High-efficiency damage self-repairing degradable double dynamic crosslinking Vitrimer resin | |
| JPS63251432A (en) | Production of asbestos-free friction 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 |