CN113214581B - Preparation method of high-flexibility folding-resistant polytetrafluoroethylene glass fiber material - Google Patents
Preparation method of high-flexibility folding-resistant polytetrafluoroethylene glass fiber material Download PDFInfo
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- CN113214581B CN113214581B CN202110517373.6A CN202110517373A CN113214581B CN 113214581 B CN113214581 B CN 113214581B CN 202110517373 A CN202110517373 A CN 202110517373A CN 113214581 B CN113214581 B CN 113214581B
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- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/08—Ingredients agglomerated by treatment with a binding agent
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/08—Oxygen-containing compounds
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- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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- 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
- C08K9/00—Use of pretreated ingredients
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Abstract
The invention relates to a preparation method of a high-flexibility folding-resistant polytetrafluoroethylene glass fiber material, belonging to the technical field of composite materials, and the preparation method of the high-flexibility folding-resistant polytetrafluoroethylene glass fiber material comprises S1, dipping and dewaxing by using a dewaxing agent; s2, dipping the dewaxed glass fiber cloth by using polyvinyl alcohol-toughening dispersion liquid, and drying to obtain toughened glass fiber cloth; s3, dipping the toughened glass fiber cloth by adopting polytetrafluoroethylene dispersion liquid; and S4, drying and sintering the resin composite fiber cloth impregnated with the polytetrafluoroethylene dispersion liquid to obtain the high-flexibility folding-resistant polytetrafluoroethylene glass fiber composite material. By adopting the scheme of the invention, the tensile breaking strength of the material can be improved, and the folding resistance and the flexibility of the glass fiber material are greatly improved.
Description
Technical Field
The invention belongs to the technical field of composite materials, and particularly relates to a preparation method of a high-flexibility folding-resistant polytetrafluoroethylene glass fiber material.
Background
The polytetrafluoroethylene glass fiber is a composite glass fiber material which takes glass fiber as a base material and is impregnated with polytetrafluoroethylene, the prepared polytetrafluoroethylene glass fiber composite material has the advantages of both glass fiber and polytetrafluoroethylene, and can be widely applied to the fields of aviation, papermaking, food, environmental protection, printing and dyeing, clothing, chemical industry, glass, medicine, electronics, insulation, buildings (shed roof film structure base cloth), grinding wheel slicing, machinery and the like. Can be used for anticorrosion coating, linings and liners, anti-sticking conveyor belts, high-frequency copper-clad plates, building membrane materials, insulating materials, microwave drying conveyor belts, flexible compensators, friction materials and the like. Along with the use of the polytetrafluoroethylene glass fiber material, the research and development of the polytetrafluoroethylene glass fiber material which meets the process requirements and has good flexibility and folding resistance is very necessary.
Disclosure of Invention
Based on the above, aiming at the defects of the prior art, the invention provides the preparation method of the high-flexibility folding-resistant polytetrafluoroethylene glass fiber material, and by adopting the scheme of the invention, the tensile breaking strength of the material can be improved, and the folding resistance and the flexibility of the glass fiber material are greatly improved.
In order to solve the technical problem provided by the invention, the invention provides a preparation method of a high-flexibility folding-resistant polytetrafluoroethylene glass fiber material on one hand, which comprises the following steps:
s1, dipping and dewaxing by using a dewaxing agent;
s2, dipping the dewaxed glass fiber cloth by using polyvinyl alcohol-toughening dispersion liquid, and drying to obtain toughened glass fiber cloth;
the formula of the polyvinyl alcohol-toughening dispersion liquid comprises the following components: 20-25 parts of polyvinyl alcohol, 10-15 parts of a toughening agent, 5-8 parts of sodium lignosulfonate, 60-100 parts of water and 20-25 parts of ethanol;
s3, dipping the toughened glass fiber cloth by adopting polytetrafluoroethylene dispersion liquid;
and S4, drying and sintering the resin composite fiber cloth impregnated with the polytetrafluoroethylene dispersion liquid to obtain the high-flexibility folding-resistant polytetrafluoroethylene glass fiber composite material.
Tests show that the glass fiber cloth can be softer and more folding-resistant by treating the glass fiber cloth with the polytetrafluoroethylene dispersion liquid containing the zinc oxide whiskers, but the method has the defects that the prepared composite material has the defects that the glass fibers and the zinc oxide whiskers are exposed, flow marks and cracks exist on the surface of a finished product, and the finished product is difficult to prepare and obtain. After the method is adopted, polyvinyl alcohol is dispersed by adopting a water-ethanol dispersion system, a stable polyvinyl alcohol film can be formed on the surface of the glass fiber cloth by the prepared polyvinyl alcohol-toughening dispersion liquid by virtue of the further dispersion action of sodium lignosulfonate, the treated glass fiber cloth is treated by adopting polytetrafluoroethylene dispersion liquid, and the polyvinyl alcohol is decomposed after sintering, so that the finally prepared composite material has the advantages of smooth and flat surface, no flow mark and no crack.
Further, the dewaxing water formula of S1: 20-30g/L of fatty alcohol-polyoxyethylene ether, 5-7g/L of hydrochloric acid and 5-15g/L of sodium methallyl sulfonate.
Further, the specific process of removing the wax in S1 is to soak the glass fiber cloth in the wax removing agent for 2-4min, take out, wash with water for 2-4 times, and naturally dry until the surface is anhydrous.
Further, the polyvinyl alcohol of S2 is 1788 type.
Further, the preparation method of the polyvinyl alcohol-toughening dispersion liquid of S2 includes: dispersing polyvinyl alcohol in ethanol, adding water, heating to 70-90 deg.C, keeping the temperature for 30-60min, adding sodium lignosulfonate, mixing, adding toughening agent, and mixing.
Further, the toughening agent of S2 is zinc oxide whisker.
Further, the dipping treatment temperature of S2 is 60-70 ℃, the dipping time is 20-30min, the drying of S2 is drying at room temperature, and the air flow rate is 20-40m3The drying time is 10-20h per minute.
Further, in the step S3, the solid content of the polytetrafluoroethylene dispersion liquid used for impregnation is 30-40%, the impregnation time is 30-60S, and the impregnation times are 2-4 times.
Further, the sintering temperature is 350-450 ℃, and the sintering time is 30-60 s.
Compared with the prior art, the technical scheme of the invention has the advantages that: after the glass fiber cloth is pretreated by the polyvinyl alcohol-toughening dispersion liquid, the polytetrafluoroethylene dispersion liquid has good wettability on the surface of the glass fiber cloth, the impregnation speed is high, an impregnated product is smooth and flat after being dried, no flow mark and no crack exist, no glass fiber and toughening material are exposed, and the finished product qualification rate is high. The mechanical property test result shows that the tensile breaking strength of the material can be improved by adopting the scheme of the invention, and the folding resistance and the flexibility of the glass fiber material are greatly improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
A preparation method of a high-flexibility folding-resistant polytetrafluoroethylene glass fiber material comprises the following steps:
and S1, soaking the glass fiber cloth in the paraffin removal agent for 3min, taking out, washing with water for 3 times, and naturally drying until the surface is anhydrous. Wherein the formula of the wax removing water comprises 25g/L fatty alcohol-polyoxyethylene ether, 6g/L hydrochloric acid and 10g/L sodium methallyl sulfonate.
S2, soaking the glass fiber cloth after wax removal in polyvinyl alcohol-toughening dispersion liquid at the temperature of 65 ℃ for 25min, and then, after the soaking is finished, keeping the wind speed at 25m3Drying for 15 h.
The preparation method of the polyvinyl alcohol-toughening dispersion liquid comprises the following steps: adding 20 parts of 1788 type polyvinyl alcohol into the same amount of absolute ethyl alcohol, uniformly mixing, adding 80 parts of water, heating to 80 ℃, preserving heat for 40min, adding 7 parts of sodium lignosulphonate, uniformly mixing, adding 13 parts of zinc oxide whiskers, and uniformly mixing.
And S3, dipping the toughened glass fiber cloth for 40S by adopting polytetrafluoroethylene dispersion liquid with the solid content of 35%, carrying out secondary dipping under the same conditions after the coating is dried after dipping is finished, and carrying out tertiary dipping after drying.
And S4, drying the resin composite fiber cloth impregnated with the polytetrafluoroethylene dispersion liquid at 70 ℃ for 3h, then drying at 100 ℃ for 40min, and finally sintering at 350 ℃ for 60S to obtain the polytetrafluoroethylene glass fiber composite material.
The obtained composite material is smooth, flat, free of flow marks and cracks, is subjected to a tensile breaking strength test according to the method in GB/T25042-2010 and is subjected to a folding resistance test, and the result shows that the tensile breaking strength is as follows: the warp direction is 3663N/50mm, and the weft direction is 3187N/50 mm; tensile breaking strength after folding: the warp direction is 3642N/50mm, and the weft direction is 3169N/50 mm.
Example 2
A preparation method of a high-flexibility folding-resistant polytetrafluoroethylene glass fiber material comprises the following steps:
and S1, soaking the glass fiber cloth in the paraffin removal agent for 3min, taking out, washing with water for 3 times, and naturally drying until the surface is anhydrous. Wherein the formula of the wax removing water comprises 25g/L fatty alcohol-polyoxyethylene ether, 6g/L hydrochloric acid and 10g/L sodium methallyl sulfonate.
S2, soaking the dewaxed glass fiber cloth in the polyvinyl alcohol-toughening dispersion liquid at the temperature of 60 ℃ for 30min, and then, soaking at the wind speed of 25m3Drying for 15 h.
The preparation method of the polyvinyl alcohol-toughening dispersion liquid comprises the following steps: adding 25 parts of 1788 type polyvinyl alcohol into the same amount of absolute ethyl alcohol, uniformly mixing, adding 100 parts of water, heating to 80 ℃, keeping the temperature for 40min, adding 8 parts of sodium lignosulphonate, uniformly mixing, adding 15 parts of zinc oxide whiskers, and uniformly mixing.
And S3, dipping the toughened glass fiber cloth for 40S by adopting polytetrafluoroethylene dispersion liquid with the solid content of 35%, carrying out secondary dipping under the same conditions after the coating is dried after dipping is finished, and carrying out tertiary dipping after drying.
And S4, drying the resin composite fiber cloth impregnated with the polytetrafluoroethylene dispersion liquid at 70 ℃ for 3h, then drying at 100 ℃ for 40min, and finally sintering at 400 ℃ for 40S to obtain the high-flexibility folding-resistant polytetrafluoroethylene glass fiber composite material.
The obtained composite material is smooth, flat, free of flow marks and cracks, is subjected to a tensile breaking strength test according to the method in GB/T25042-2010 and is subjected to a folding resistance test, and the result shows that the tensile breaking strength is as follows: the warp direction is 3527N/50mm, and the weft direction is 3020N/50 mm; tensile breaking strength after folding: the warp direction is 3524N/50mm, and the weft direction is 3016N/50 mm.
Example 3
A preparation method of a high-flexibility folding-resistant polytetrafluoroethylene glass fiber material comprises the following steps:
and S1, soaking the glass fiber cloth in the paraffin removal agent for 3min, taking out, washing with water for 3 times, and naturally drying until the surface is anhydrous. Wherein the formula of the wax removing water comprises 25g/L fatty alcohol-polyoxyethylene ether, 6g/L hydrochloric acid and 10g/L sodium methallyl sulfonate.
S2, soaking the glass fiber cloth after wax removal in polyvinyl alcohol-toughening dispersion liquid at the temperature of 70 ℃ for 20min, and then, after the soaking, keeping the wind speed at 25m3Drying for 15 h.
The preparation method of the polyvinyl alcohol-toughening dispersion liquid comprises the following steps: adding 20 parts of 1788 type polyvinyl alcohol into the same amount of absolute ethyl alcohol, uniformly mixing, adding 60 parts of water, heating to 80 ℃, keeping the temperature for 40min, adding 5 parts of sodium lignosulphonate, uniformly mixing, adding 10 parts of zinc oxide whiskers, and uniformly mixing.
And S3, dipping the toughened glass fiber cloth for 40S by adopting polytetrafluoroethylene dispersion liquid with the solid content of 35%, carrying out secondary dipping under the same conditions after the coating is dried after dipping is finished, and carrying out tertiary dipping after drying.
And S4, drying the resin composite fiber cloth impregnated with the polytetrafluoroethylene dispersion liquid at 70 ℃ for 3h, then drying at 100 ℃ for 40min, and finally sintering at 400 ℃ for 40S to obtain the high-flexibility folding-resistant polytetrafluoroethylene glass fiber composite material.
The obtained composite material is smooth, flat, free of flow marks and cracks, is subjected to a tensile breaking strength test according to the method in GB/T25042-2010 and is subjected to a folding resistance test, and the result shows that the tensile breaking strength is as follows: the warp direction is 3504N/50mm, and the weft direction is 3008N/50 mm; tensile breaking strength after folding: the warp direction was 3493N/50mm and the weft direction was 2995N/50 mm.
Example 4
A preparation method of a high-flexibility folding-resistant polytetrafluoroethylene glass fiber material comprises the following steps:
and S1, soaking the glass fiber cloth in the paraffin removal agent for 3min, taking out, washing with water for 3 times, and naturally drying until the surface is anhydrous. Wherein the formula of the wax removing water comprises 25g/L fatty alcohol-polyoxyethylene ether, 6g/L hydrochloric acid and 10g/L sodium methallyl sulfonate.
S2, soaking the glass fiber cloth after wax removal in polyvinyl alcohol-toughening dispersion liquid at the temperature of 65 ℃ for 25min, and then, after the soaking is finished, keeping the wind speed at 25m3Drying for 15 h.
The preparation method of the polyvinyl alcohol-toughening dispersion liquid comprises the following steps: adding 20 parts of 1788 type polyvinyl alcohol into the same amount of absolute ethyl alcohol, uniformly mixing, adding 80 parts of water, heating to 80 ℃, preserving heat for 40min, adding 7 parts of sodium lignosulphonate, uniformly mixing, adding 13 parts of zinc oxide whiskers, and uniformly mixing.
And S3, dipping the toughened glass fiber cloth for 40S by adopting polytetrafluoroethylene dispersion liquid with the solid content of 35%, carrying out secondary dipping under the same conditions after the coating is dried after dipping is finished, and carrying out tertiary dipping after drying.
And S4, drying the resin composite fiber cloth impregnated with the polytetrafluoroethylene dispersion liquid at 70 ℃ for 3h, then drying at 100 ℃ for 40min, and finally sintering at 450 ℃ for 30S to obtain the high-flexibility folding-resistant polytetrafluoroethylene glass fiber composite material.
The obtained composite material is smooth, flat, free of flow marks and cracks, is subjected to a tensile breaking strength test according to the method in GB/T25042-2010 and is subjected to a folding resistance test, and the result shows that the tensile breaking strength is as follows: the warp direction is 3515N/50mm, and the weft direction is 3002N/50 mm; tensile breaking strength after folding: the warp direction was 3497N/50mm and the weft direction was 2987N/50 mm.
Example 5
A preparation method of a high-flexibility folding-resistant polytetrafluoroethylene glass fiber material comprises the following steps:
and S1, soaking the glass fiber cloth in the paraffin removal agent for 3min, taking out, washing with water for 3 times, and naturally drying until the surface is anhydrous. Wherein the formula of the wax removing water comprises 25g/L fatty alcohol-polyoxyethylene ether, 6g/L hydrochloric acid and 10g/L sodium methallyl sulfonate.
S2, soaking the glass fiber cloth after wax removal in polyvinyl alcohol-toughening dispersion liquid at the temperature of 65 ℃ for 25min, and then, after the soaking is finished, keeping the wind speed at 25m3Drying for 15 h.
The preparation method of the polyvinyl alcohol-toughening dispersion liquid comprises the following steps: adding 20 parts of 1788 type polyvinyl alcohol into the same amount of absolute ethyl alcohol, uniformly mixing, adding 80 parts of water, heating to 80 ℃, preserving heat for 40min, adding 7 parts of sodium lignosulphonate, uniformly mixing, adding 13 parts of zinc oxide whiskers, and uniformly mixing.
And S3, dipping the toughened glass fiber cloth for 40S by adopting polytetrafluoroethylene dispersion liquid with solid content of 40%, and after dipping is finished, carrying out secondary dipping under the same conditions after the coating is dried.
S4, drying the resin composite fiber cloth impregnated with the polytetrafluoroethylene dispersion liquid at 70 ℃ for 3h, then drying at 100 ℃ for 40min, and finally sintering at 350 ℃ for 60S to obtain the high-flexibility folding-resistant polytetrafluoroethylene glass fiber composite material.
The obtained composite material is smooth, flat, free of flow marks and cracks, is subjected to a tensile breaking strength test according to the method in GB/T25042-2010 and is subjected to a folding resistance test, and the result shows that the tensile breaking strength is as follows: the warp direction is 3517N/50mm, and the weft direction is 3012N/50 mm; tensile breaking strength after folding: the warp direction was 3514N/50mm, and the weft direction was 2993N/50 mm.
Comparative example 1
A preparation method of a polytetrafluoroethylene glass fiber material comprises the following steps:
and S1, soaking the glass fiber cloth in the paraffin removal agent for 3min, taking out, washing with water for 3 times, and naturally drying until the surface is anhydrous. Wherein the formula of the wax removing water comprises 25g/L fatty alcohol-polyoxyethylene ether, 6g/L hydrochloric acid and 10g/L sodium methallyl sulfonate.
And S2, drying the glass fiber cloth subjected to wax removal for 5 hours at the temperature of 65 ℃.
And S3, dipping the dried glass fiber cloth for 40S by adopting polytetrafluoroethylene dispersion liquid with the solid content of 35%, carrying out secondary dipping under the same conditions after the coating is dried after dipping is finished, and carrying out tertiary dipping after drying.
And S4, drying the resin composite fiber cloth impregnated with the polytetrafluoroethylene dispersion liquid at 70 ℃ for 3h, then drying at 100 ℃ for 40min, and finally sintering at 350 ℃ for 60S to obtain the polytetrafluoroethylene glass fiber composite material.
The obtained composite material is smooth, flat, free of flow marks and cracks, is subjected to a tensile breaking strength test according to the method in GB/T25042-2010 and is subjected to a folding resistance test, and the result shows that the tensile breaking strength is as follows: the warp direction is 3142N/50mm, and the weft direction is 2765N/50 mm; tensile breaking strength after folding: the warp direction was 3139N/50mm and the weft direction was 2753N/50 mm.
Comparative example 2
A preparation method of a polytetrafluoroethylene glass fiber material comprises the following steps:
and S1, soaking the glass fiber cloth in the paraffin removal agent for 3min, taking out, washing with water for 3 times, and naturally drying until the surface is anhydrous. Wherein the formula of the wax removing water comprises 25g/L fatty alcohol-polyoxyethylene ether, 6g/L hydrochloric acid and 10g/L sodium methallyl sulfonate.
And S2, drying the glass fiber cloth subjected to wax removal for 5 hours at the temperature of 65 ℃.
S3, dipping the dried glass fiber cloth for 40S by using polytetrafluoroethylene dispersion liquid containing zinc oxide whiskers, wherein the solid content of the polytetrafluoroethylene dispersion liquid is 35%, the weight percentage of the zinc oxide whiskers in the polytetrafluoroethylene dispersion liquid is 5%, after dipping, carrying out secondary dipping under the same conditions after the coating is dried, and carrying out tertiary dipping after drying;
and S4, drying the resin composite fiber cloth impregnated with the polytetrafluoroethylene dispersion liquid at 70 ℃ for 3h, then drying at 100 ℃ for 40min, and finally sintering at 350 ℃ for 60S to obtain the polytetrafluoroethylene glass fiber composite material.
The obtained composite material has unsmooth surface with flow marks and cracks and exposed glass fibers and toughening materials, and is subjected to tensile breaking strength test and folding resistance test according to the method in GB/T25042-2010, and the results show that the tensile breaking strength is as follows: the warp direction is 3243N/50mm, and the weft direction is 2854N/50 mm; tensile breaking strength after folding: the warp direction is 3146N/50mm, and the weft direction is 2769N/50 mm.
After the glass fiber cloth is pretreated by the polyvinyl alcohol-toughening dispersion liquid, the polytetrafluoroethylene dispersion liquid has high hydrophilic speed and strong binding force on the surface of the glass fiber cloth, the impregnation treatment efficiency of polytetrafluoroethylene can be greatly improved, the impregnation speed is high, an impregnated product is smooth, flat, free of flow marks and cracks after being dried, free of glass fibers and toughening materials and high in finished product qualification rate. The mechanical property test result shows that the tensile breaking strength of the material can be improved by adopting the scheme of the invention, and the folding resistance and the flexibility of the glass fiber material are greatly improved.
Finally, it is also noted that the above-mentioned lists merely illustrate a few specific embodiments of the invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (8)
1. A preparation method of a high-flexibility folding-resistant polytetrafluoroethylene glass fiber material is characterized by comprising the following steps:
s1, dipping and dewaxing by using a dewaxing agent;
s2, dipping the dewaxed glass fiber cloth by using polyvinyl alcohol-toughening dispersion liquid, and drying to obtain toughened glass fiber cloth;
the formula of the polyvinyl alcohol-toughening dispersion liquid comprises the following components: 20-25 parts of polyvinyl alcohol, 10-15 parts of zinc oxide whisker, 5-8 parts of sodium lignosulfonate, 60-100 parts of water and 20-25 parts of ethanol;
s3, dipping the toughened glass fiber cloth by adopting polytetrafluoroethylene dispersion liquid;
and S4, drying and sintering the resin composite fiber cloth impregnated with the polytetrafluoroethylene dispersion liquid to obtain the high-flexibility folding-resistant polytetrafluoroethylene glass fiber composite material.
2. The method of claim 1, wherein the dewaxing water formulation of S1: 20-30g/L of fatty alcohol-polyoxyethylene ether, 5-7g/L of hydrochloric acid and 5-15g/L of sodium methallyl sulfonate.
3. The method as claimed in claim 1, wherein the dewaxing process of S1 comprises soaking the glass fiber cloth in the dewaxing agent for 2-4min, taking out, washing with water for 2-4 times, and naturally drying until the surface is anhydrous.
4. The method of claim 1, wherein the polyvinyl alcohol of S2 is of type 1788.
5. The method of claim 1, wherein the polyvinyl alcohol-toughening dispersion of S2 is prepared by: dispersing polyvinyl alcohol in ethanol, adding water, heating to 70-90 deg.C, keeping the temperature for 30-60min, adding sodium lignosulfonate, mixing, adding toughening agent, and mixing.
6. A method according to any one of claims 4 to 5, wherein the temperature of the impregnation treatment S2 is 60-70 deg.CThe dipping time is 20-30min, the drying in S2 is drying at room temperature, and the air flow rate is 20-40m3The drying time is 10-20h per minute.
7. The method as claimed in claim 1, wherein the impregnation in S3 is carried out with a polytetrafluoroethylene dispersion having a solid content of 30-40%, an impregnation time of 30-60S, and an impregnation number of 2-4.
8. The method as claimed in claim 1, wherein the sintering temperature is 350-450 ℃ and the sintering time is 30-60 s.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001089624A (en) * | 1999-09-22 | 2001-04-03 | Asahi Glass Furoro Polymers Kk | Polytetrafluoroethylene aqueous dispersion composition and preparation of coating film |
| US20020123282A1 (en) * | 2001-01-03 | 2002-09-05 | Mccarthy Thomas F. | Fluoropolymer composites |
| WO2006095825A1 (en) * | 2005-03-10 | 2006-09-14 | Daikin Industries, Ltd. | Polytetrafluoroethylene aqueous dispersion composition, polytetrafluoroethylene resin film and polytetrafluoroethylene resin impregnated article |
| CN103319824B (en) * | 2013-05-28 | 2015-06-17 | 山东瑞特新材料有限公司 | Method for preparing modified and enhanced polytetrafluoroethylene composite material |
| CN103275448B (en) * | 2013-06-25 | 2015-05-06 | 李一帆 | Preparation method of modified packing ion enhanced polytetrafluoroethylene composite |
| CN111114069B (en) * | 2019-12-23 | 2021-09-21 | 武汉理工大学 | Ceramic/polytetrafluoroethylene composite medium substrate and preparation method thereof |
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