CN114703611A - Preparation method of polytetrafluoroethylene insulation coating - Google Patents
Preparation method of polytetrafluoroethylene insulation coating Download PDFInfo
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- CN114703611A CN114703611A CN202111443792.6A CN202111443792A CN114703611A CN 114703611 A CN114703611 A CN 114703611A CN 202111443792 A CN202111443792 A CN 202111443792A CN 114703611 A CN114703611 A CN 114703611A
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- spraying
- base cloth
- coating
- drying
- polytetrafluoroethylene
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- 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
- D06B1/00—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating
- D06B1/02—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating by spraying or projecting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
- B05D3/0413—Heating with air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
- B05D7/04—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber to surfaces of films or sheets
-
- 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
Abstract
The invention relates to a preparation method of polytetrafluoroethylene insulation coating. Preparing raw materials, firstly preparing base cloth and polytetrafluoroethylene insulating coating, cutting according to the width of the base cloth as required, after cutting, spreading the base cloth, fixing the base cloth on transmission equipment, wherein the base cloth is non-woven fabric, the polytetrafluoroethylene insulating coating is prepared by mixing polytetrafluoroethylene powder and water, the polytetrafluoroethylene powder is firstly broken by a pounding machine, then vibrating and screening by a 20-mesh screen to remove large-particle materials and other impurities, and then uniformly stirring the polytetrafluoroethylene powder and the water in a high-speed mixer at high speed.
Description
Technical Field
The invention relates to the field of fluoroplastic products, in particular to a preparation method of polytetrafluoroethylene insulation coating.
Background
The tetrafluoroethylene product is made of polytetrafluoroethylene resin through cold pressing and sintering by a die, and has excellent corrosion resistance, good self-lubricating property and non-blocking property. Therefore, the product is almost resistant to all chemical media and has the characteristics of wear resistance, pressure resistance, low friction coefficient and the like. The polytetrafluoroethylene insulation coating is one of the applications, and the polytetrafluoroethylene insulation coating is used for coating polytetrafluoroethylene on cloth, and the existing polytetrafluoroethylene insulation coating manufacturing process can cause the surface of the cloth to generate bulges after spraying in the preparation process, so that the quality is influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a preparation method of polytetrafluoroethylene insulation coating, which solves the problems.
In order to achieve the above purpose, the invention provides the following technical scheme: the preparation method of the polytetrafluoroethylene insulation coating comprises the following steps
S1: preparing raw materials, namely preparing base cloth and polytetrafluoroethylene insulating coating, cutting according to the required width of the base cloth, unfolding the base cloth after cutting, and fixing the base cloth on transmission equipment;
the base cloth is non-woven fabric;
the polytetrafluoroethylene insulating coating is prepared by mixing polytetrafluoroethylene powder and water, the polytetrafluoroethylene powder is broken up by a pounding machine, then the vibration is carried out, the screening is carried out by a 20-mesh screen, the large-particle materials and other impurities are removed, the polytetrafluoroethylene powder and the water are uniformly stirred at high speed in a high-speed mixer, the polytetrafluoroethylene powder and the water are mixed and inserted into a mixed solution by a stick or other objects, after the stick or other objects are taken up, the lower part of the stick is provided with a hanging wire, namely, the coating is obtained after the mixing is finished;
the ratio of the water to the polytetrafluoroethylene powder is 1: 4;
s2: carrying out spraying preparation, filling the prepared coating into spraying equipment, then drawing the base cloth, and guiding one end of the cloth to the lower part of the spraying equipment;
the spraying equipment mainly comprises three parts, namely a spray gun, an air compressor and an air conveying pipe for connecting the air compressor and the spray gun, wherein joints among the three parts are firmly and reliably assembled to ensure air pressure. The pressure of the air compressor is controlled to be 0.8 +/-0.1 Mpa, the air compressor is started, spraying can be carried out after the pressure is stable, and a spraying hole of the spraying gun, a spraying gun cavity and the storage tank are clean and free of impurities;
s3: spraying, wherein in the spraying process, the operation environment needs to be kept dustless, the base cloth is conveyed to the position below the spraying heads of the spraying device through a conveying roller to be sprayed, a plurality of groups of spraying heads need to be adopted during spraying, the distance between each group of spraying heads is kept at 5M, the distance between each spraying head and the base cloth needs to be kept at 30-40 cm, the airflow axial lead of each spraying head is vertical to the surface of the base cloth, the spraying is carried out at the same angle when a plurality of spraying heads are used for spraying, then the coating is uniformly sprayed on the surface of the base cloth, and the spraying thickness is kept at 0.1-0.15 cm;
the base cloth is integrally processed by a hot air blower before spraying, and the base cloth is dried by the hot air blower to ensure basic drying;
after spraying, if the surface coating of the base cloth is wrinkled, which indicates that the drying time of the coating is too short or the coating film is too thick, the internal deep agent is not volatilized in time, the external drying and the internal drying are not dried, the surface coating needs to be immediately shoveled off, then high-temperature cleaning is performed immediately, after cleaning is completed, the base cloth is dried and then sprayed again, and when spraying is performed again, the distance between each spraying head needs to be adjusted, and the distance between each spraying head is adjusted to 5-10M;
s4: drying, namely drawing the sprayed base cloth into a drying device, drying by the drying device, wherein the sprayed base cloth needs to be kept still for a period of time before drying, the surface of the coating on the surface of the base cloth is fixed, then, drying is carried out, and during drying, one side of the base cloth, which is sprayed with the coating, needs to be aligned to an air blowing port or a heat source of the drying device, the drying time of each meter on the base cloth needs to be kept for three minutes, so that the coating on the basic surface is completely dried, and the surface is smooth and has no convex particles after the coating is completely dried;
s5: secondary drying, wherein in the secondary drying process, the base cloth is pulled into the drying equipment again to be dried, and the drying time of each meter needs to be kept for 1 minute, so that the drying of the coating can be effectively ensured;
s6: detecting, namely measuring the cloth subjected to secondary drying, mainly measuring the spraying quality and the spraying thickness, wherein after the spraying is finished, the surface of the base cloth is free of burrs, bright, wrinkle and foreign object bulges, then measuring the spraying thickness on the base cloth, measuring every other meter on the base cloth by using laser measuring equipment, and measuring the spraying thickness by not less than 0.1 mm;
s7: cutting and rolling, cutting according to the required length and width of an order, rolling the base cloth coated with polytetrafluoroethylene by using a rolling roller after cutting, and wrapping a layer of plastic film on the outer side after rolling.
Compared with the prior art, the invention provides a preparation method of polytetrafluoroethylene insulation coating, which has the following beneficial effects:
1. according to the preparation method of the polytetrafluoroethylene insulation coating, the dust-free operation environment is required to be kept in the spraying process, and the process mode of conveying rollers can effectively solve the problem that the dust is attached to the cloth in the spraying process to cause the projection after the spraying on the cloth is finished.
2. According to the preparation method of the polytetrafluoroethylene insulation coating, multiple groups of spraying heads are needed during spraying, the distance between each group of spraying heads is kept at 5M, the distance between each spraying head and the base cloth is kept at 30-40 cm, the airflow axis of each spraying head is perpendicular to the surface of the base cloth, and multiple spraying heads are sprayed at the same angle at the same time, so that the distance between each spraying head and the cloth and the distance between each spraying head can be used for drying the cloth in the spraying process, and the condition that wrinkles exist in the spraying process is effectively avoided.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
Referring to fig. 1, a method for preparing a teflon insulating coating includes the following steps:
s1: preparing raw materials, namely preparing base cloth and polytetrafluoroethylene insulating coating, cutting according to the required width of the base cloth, unfolding the base cloth after cutting, and fixing the base cloth on transmission equipment;
the base cloth is non-woven fabric;
the polytetrafluoroethylene insulating coating is prepared by mixing polytetrafluoroethylene powder and water, the polytetrafluoroethylene powder is broken up by a pounding machine, then the vibration is carried out, the screening is carried out by a 20-mesh screen, the large-particle materials and other impurities are removed, the polytetrafluoroethylene powder and the water are uniformly stirred at high speed in a high-speed mixer, the polytetrafluoroethylene powder and the water are mixed and inserted into a mixed solution by a stick or other objects, after the stick or other objects are taken up, the lower part of the stick is provided with a hanging wire, namely, the coating is obtained after the mixing is finished;
the ratio of the water to the polytetrafluoroethylene powder is 1: 4;
s2: carrying out spraying preparation, filling the prepared coating into spraying equipment, then drawing the base cloth, and guiding one end of the cloth to the lower part of the spraying equipment;
the spraying equipment mainly comprises three parts, namely a spray gun, an air compressor and an air conveying pipe for connecting the air compressor and the spray gun, wherein joints among the three parts are firmly and reliably assembled to ensure air pressure. The pressure of the air compressor is controlled to be 0.8 +/-0.1 MPa, the air compressor is started, spraying can be carried out after the pressure is stable, and the spraying hole of the spraying gun, the cavity of the spraying gun and the storage tank are clean and free of impurities;
s3: spraying, wherein in the spraying process, the operation environment needs to be kept dustless, the base cloth is conveyed to the position below the spraying heads of the spraying device through a conveying roller to be sprayed, a plurality of groups of spraying heads need to be adopted during spraying, the distance between each group of spraying heads is kept at 5M, the distance between each spraying head and the base cloth needs to be kept at 30-40 cm, the airflow axial lead of each spraying head is vertical to the surface of the base cloth, the spraying is carried out at the same angle when a plurality of spraying heads are used for spraying, then the coating is uniformly sprayed on the surface of the base cloth, and the spraying thickness is kept at 0.1-0.15 cm;
the base cloth is integrally processed by a hot air blower before spraying, and the base cloth is dried by the hot air blower to ensure basic drying;
after spraying, if the surface coating of the base cloth is wrinkled, which indicates that the drying time of the coating is too short or the coating film is too thick, the internal deep agent is not volatilized in time, the external drying and the internal drying are not dried, the surface coating needs to be immediately shoveled off, then high-temperature cleaning is performed immediately, after cleaning is completed, the base cloth is dried and then sprayed again, and when spraying is performed again, the distance between each spraying head needs to be adjusted, and the distance between each spraying head is adjusted to 5-10M;
s4: drying, namely drawing the sprayed base cloth into a drying device, drying by the drying device, standing the sprayed base cloth for a period of time before drying, fixing the surface of the coating on the surface of the base cloth, then drying, and aligning one side of the base cloth, which is sprayed with the coating, with a blowing port or a heat source of the drying device during drying, wherein the drying time per meter on the base cloth needs to be kept for three minutes to ensure that the coating on the basic surface is completely dried, and the surface is smooth and has no raised particles after the coating is completely dried;
s5: secondary drying, wherein in the secondary drying process, the base cloth is pulled into the drying equipment again to be dried, and the drying time of each meter needs to be kept for 1 minute, so that the drying of the coating can be effectively ensured;
s6: detecting, namely measuring the cloth subjected to secondary drying, mainly measuring the spraying quality and the spraying thickness, wherein after the spraying is finished, the surface of the base cloth is free of burrs, bright, wrinkle and foreign object bulges, then measuring the spraying thickness on the base cloth, measuring every other meter on the base cloth by using laser measuring equipment, and measuring the spraying thickness by not less than 0.1 mm;
s7: cutting and rolling, cutting according to the required length and width of an order, rolling the base cloth coated with polytetrafluoroethylene by using a rolling roller after cutting, and wrapping a layer of plastic film on the outer side after rolling.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The preparation method of the polytetrafluoroethylene insulation coating is characterized by comprising the following steps:
s1: preparing raw materials, namely preparing base cloth and polytetrafluoroethylene insulating coating at first, cutting the base cloth according to the required width of the base cloth, unfolding the base cloth after cutting, and fixing the base cloth on transmission equipment;
s2: carrying out spraying preparation, filling the prepared coating into spraying equipment, then drawing the base cloth, and guiding one end of the cloth to the lower part of the spraying equipment;
s3: spraying, wherein in the spraying process, the working environment needs to be kept dustless, and the base cloth is conveyed to the position below a spraying head of a spraying device through a conveying roller to be sprayed;
s4: drying, namely drawing the sprayed base cloth into a drying device, drying by the drying device, wherein the sprayed base cloth needs to be kept still for a period of time before drying, the surface of the coating on the surface of the base cloth is fixed, then, drying is carried out, and during drying, one side of the base cloth, which is sprayed with the coating, needs to be aligned to an air blowing port or a heat source of the drying device, the drying time of each meter on the base cloth needs to be kept for three minutes, so that the coating on the basic surface is completely dried, and the surface is smooth and has no convex particles after the coating is completely dried;
s5: secondary drying, wherein in the secondary drying process, the base cloth is pulled into the drying equipment again to be dried, and the drying time of each meter needs to be kept for 1 minute, so that the drying of the coating can be effectively ensured;
s6: detecting, and finally measuring the cloth subjected to secondary drying;
s7: cutting and rolling, cutting according to the required length and width of an order, rolling the base cloth coated with polytetrafluoroethylene by using a rolling roller after cutting, and wrapping a layer of plastic film on the outer side after rolling.
2. The method for preparing polytetrafluoroethylene insulation coating according to claim 1, wherein the method comprises the following steps: the base cloth is non-woven fabric;
the polytetrafluoroethylene insulating coating is prepared by mixing polytetrafluoroethylene powder and water, the polytetrafluoroethylene powder is broken up by a pounding machine, then the vibration is carried out, the screening is carried out by a 20-mesh screen, the large-particle materials and other impurities are removed, the polytetrafluoroethylene powder and the water are uniformly stirred at high speed in a high-speed mixer, the polytetrafluoroethylene powder and the water are mixed and inserted into a mixed solution by a stick or other objects, after the stick or other objects are taken up, the lower part of the stick is provided with a hanging wire, namely, the coating is obtained after the mixing is finished;
the ratio of the water to the polytetrafluoroethylene powder is 1: 4.
3. The method for preparing polytetrafluoroethylene insulation coating according to claim 1, wherein the method comprises the following steps: the spraying equipment mainly comprises three parts, namely a spray gun, an air compressor and an air pipe for connecting the air compressor and the spray gun, wherein joints among the three parts are firmly and reliably assembled to ensure air pressure;
the pressure of the air compressor is controlled to be 0.8 +/-0.1 MPa, the air compressor is started, spraying can be carried out after the pressure is stable, and the spraying hole of the spray gun, the cavity of the spray gun and the storage tank are clean and free of impurities.
4. The method for preparing polytetrafluoroethylene insulation coating according to claim 1, wherein the method comprises the following steps: when in spraying, a plurality of groups of spraying heads are needed, the distance between each group of spraying heads is kept at 5M, the distance between the spraying heads and the base cloth is kept at 30-40 cm, the airflow axis of the spraying heads is vertical to the surface of the base cloth, and a plurality of spraying heads are sprayed at the same angle at the same time, then the coating is uniformly sprayed on the surface of the base cloth, and the spraying thickness is kept at 0.1-0.15 cm;
the base cloth is integrally processed by the hot air blower before spraying, and the base cloth is dried by the hot air blower to ensure basic drying.
5. The method for preparing polytetrafluoroethylene insulation coating according to claim 1, wherein the method comprises the following steps: after spraying, if the surface coating of the base cloth is wrinkled, which indicates that the drying time of the coating is too short or the coating film is too thick, the inner deep agent is not volatilized in time, the outer part is dried and the inner part is not dried, the surface coating needs to be immediately shoveled off, then high-temperature cleaning is performed immediately, after cleaning is completed, the base cloth is dried and then sprayed again, and when spraying is performed again, the distance between every two spraying heads needs to be adjusted, and the distance between every two spraying heads is adjusted to be 5-10M.
6. The method for preparing polytetrafluoroethylene insulation coating according to claim 1, wherein the method comprises the following steps: mainly measure spraying quality and spraying thickness, after the spraying is accomplished, the base cloth surface does not have the burr, and the surface is bright, and no fold, there is not the protruding of foreign object, then measures the spraying thickness on the base cloth, and every meter is a measuring point on the base cloth, adopts laser measuring equipment to measure, and spraying thickness is not less than 0.1 millimeter can.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111443792.6A CN114703611A (en) | 2022-03-01 | 2022-03-01 | Preparation method of polytetrafluoroethylene insulation coating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111443792.6A CN114703611A (en) | 2022-03-01 | 2022-03-01 | Preparation method of polytetrafluoroethylene insulation coating |
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| CN114703611A true CN114703611A (en) | 2022-07-05 |
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| CN202111443792.6A Pending CN114703611A (en) | 2022-03-01 | 2022-03-01 | Preparation method of polytetrafluoroethylene insulation coating |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103500621A (en) * | 2013-09-26 | 2014-01-08 | 国家电网公司 | Porcelain insulating surface processing method for electric transmission line |
| CN103911050A (en) * | 2014-03-19 | 2014-07-09 | 浙江歌瑞新材料有限公司 | Teflon coating, its preparation method and application thereof |
| WO2016041099A1 (en) * | 2014-09-19 | 2016-03-24 | 太仓苏纶纺织化纤有限公司 | Method for coating modified polyphenylene sulphide/polytetrachloroethylene on basalt fibre filter material in layers |
| CN109130259A (en) * | 2018-10-25 | 2019-01-04 | 合肥沃龙彦高分子材料有限公司 | A kind of polytetrafluoroethylene film forming method |
| CN113718532A (en) * | 2021-09-16 | 2021-11-30 | 江苏奥凯新材料科技有限公司 | Corrosion-resistant and heat-resistant bump-free high-temperature anti-sticking cloth and manufacturing process thereof |
-
2022
- 2022-03-01 CN CN202111443792.6A patent/CN114703611A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103500621A (en) * | 2013-09-26 | 2014-01-08 | 国家电网公司 | Porcelain insulating surface processing method for electric transmission line |
| CN103911050A (en) * | 2014-03-19 | 2014-07-09 | 浙江歌瑞新材料有限公司 | Teflon coating, its preparation method and application thereof |
| WO2016041099A1 (en) * | 2014-09-19 | 2016-03-24 | 太仓苏纶纺织化纤有限公司 | Method for coating modified polyphenylene sulphide/polytetrachloroethylene on basalt fibre filter material in layers |
| CN109130259A (en) * | 2018-10-25 | 2019-01-04 | 合肥沃龙彦高分子材料有限公司 | A kind of polytetrafluoroethylene film forming method |
| CN113718532A (en) * | 2021-09-16 | 2021-11-30 | 江苏奥凯新材料科技有限公司 | Corrosion-resistant and heat-resistant bump-free high-temperature anti-sticking cloth and manufacturing process thereof |
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