CN103158310A - Highly-oil-repellenting highly-waterproof seamless polytef expansion sheet materials and preparation method thereof - Google Patents
Highly-oil-repellenting highly-waterproof seamless polytef expansion sheet materials and preparation method thereof Download PDFInfo
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- CN103158310A CN103158310A CN2013100535670A CN201310053567A CN103158310A CN 103158310 A CN103158310 A CN 103158310A CN 2013100535670 A CN2013100535670 A CN 2013100535670A CN 201310053567 A CN201310053567 A CN 201310053567A CN 103158310 A CN103158310 A CN 103158310A
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Abstract
The invention belongs to the technical field of aerospace sealing materials, and particularly discloses highly-oil-repellenting highly-waterproof seamless polytef expansion sheet materials and a preparation method thereof. The preparation method comprises the following steps: mixing materials, performing, pushing and pressing, calendaring, drying, puffing, sizing, thermocompression bonding, surface chemical processing, and the like. The highly-oil-repellenting highly-waterproof seamless polytef expansion sheet materials which are prepared and obtained by the method have good chemical stability, electrical insulating property, and self-lubrication performance, overcome the cold flow property (creepage) of pure polytef sealing materials, cannot become hard or crisp ( good elasticity) with the time, can bear the temperature range of -65 DEG C - +177 DEG C, are applicable to flat seal of various shapes, and are indispensable and important materials in frontier science and modern industries.
Description
Technical field
The invention belongs to the encapsulant technical field, more specifically relate to a kind of height for the aerospace seal Material Field and refuse polytetrafluoroethylbulked bulked sheet material of innage waterproof and preparation method thereof.
Background technology
Expanded polytetrafluoroethylsealing new structure sealing plate material is Aeronautics and Astronautics aircraft encapsulant newly developed in recent years in the world, and wherein the high polytetrafluoroethylbulked bulked sheet material of innage waterproof of refusing is for by aircraft engine.It is through techniques such as multi tension (being expanding treatment), calendering, heat treatments and a kind of porous material that forms by polytetrafluoroethylmaterial material.From the appearance, the surfacing of material, softness, but there is the micropore of a large amount of 2 μ m～25 μ m in the inside that can see material under ESEM, and its porosity can account for more than 60%.This material has following characteristics: without harm, lightweight, corrosion-resistant, anti-environmental change, overcome the cold flow properties (creep) of pure PTFE stuffing materials, be applicable to the planar structure sealing under various loads.This material seal is even, ageing-resistant, good springiness, can not harden along with the time or embrittlement, and the serviceability temperature scope is from-65 ℃～177 ℃, is therefore a kind of other encapsulant of engine of ideal Aeronautics and Astronautics aircraft.
Along with developing rapidly of China's Aero-Space cause, the use amount of expanded polytetrafluoroethylsealing sealing plate material and the scope of application also constantly enlarge, and the part of application comprises each inspection, inspection socket, the gas-liquid parts junction of aircraft etc.Along with manufacturing industry such as development boats and ships and automobiles, the application of this product will further be promoted.At present both at home and abroad also not about the report of aerospace flight vehicle with expanded polytetrafluoroethylsealing sealing plate material preparation method.
Summary of the invention
The object of the invention is to overcome the deficiency that prior art exists, a kind of seamless polytetrafluoroethylbulked bulked sheet material that height is refused oil, high water-proof function that has for the aerospace seal Material Field is provided.
Another object of the present invention is to provide this seamless polytetrafluoroethylbulked bulked preparation of plates method.
For achieving the above object, the present invention has taked following technical scheme:
A kind of high polytetrafluoroethylbulked bulked preparation of plates method of innage waterproof stitchless of refusing comprises the steps:
(1) batch mixing;
(2) preformed;
(3) pushing;
(4) calendering;
(5) drying;
(6) expanded;
(7) typing;
(8) bonding;
(9) chemical surface treatment.
In technique scheme, described batch mixing step is:
Add the hydro carbons extrusion aid to mix in the polytetrafluoroethyldispersion dispersion resin powder, under 50-70 ℃ standing 24 hours, make extrusion aid fully infiltrate through the mixture of nano silver antimicrobials and polytetrafluoroethyldispersion dispersion resin, form material.
In technique scheme, described preformed step is:
Two or more materials is pressed in advance the cylindrical base of Q120mm under 40-50 ℃.
In technique scheme, described pushing step is:
Described cylindrical base on the pushing machine, is forced into the round bar of Q12-Q22mm under 55-60 ℃ of condition.
In technique scheme, described calendering step is:
Described round bar on calender, is rolled into the oil-containing base band under 70 ℃ of conditions.
In technique scheme, described drying and expanded step are:
Described base band 260 ℃ ~ 280 ℃ lower degreasings, is removed extrusion aid, and carried out longitudinal stretching for the first time, and draw ratio is to become the degreasing base band after 3-6 times;
With described degreasing base band, carry out longitudinal stretching for the second time under 280 ℃-300 ℃, stretching ratio is 4-8 times, obtains the longitudinal stretching Ranvier's membrane.
In technique scheme, described fixating shape step is:
With described Ranvier's membrane, laterally stretch under 120 ℃-200 ℃, then at 350 ℃ of-380 ℃ of sintering curings, namely obtain microporous teflon membran.
In technique scheme, described chemical surface treatment step is:
Polyurethane chemistry is carried out on the microporous teflon membran surface process, both obtained the two component microporous teflon membrans of required high waterproof and oilproof.
In technique scheme, described adhesion step is:
With the two component microporous teflon membrans of high waterproof and oilproof carry out tight be layering after to desired thickness, then be bonded into polytetrafluoroethylbulked bulked sheet material by high temperature hot pressing.
Compared with prior art, the present invention has following beneficial effect:
The polyfluortetraethyleseal seal plate that the inventive method prepares, have without harm, lightweight, corrosion-resistant, anti-environmental change, be applicable to the flat seal of various shapes, under variable loads seal even, ageing-resistant, good springiness, can not harden along with the time or embrittlement, its serviceability temperature scope is from-65 ℃ ~ 177 ℃ etc.
The specific embodiment
The invention will be further described below in conjunction with specific embodiment.
Embodiment 1
A kind of high polytetrafluoroethylbulked bulked preparation of plates method of innage waterproof stitchless of refusing comprises the steps:
(1) batch mixing
Middle vast and boundless morning twilight chemicals 216G dispersed polytetrafluoroethylresin resin powder is mixed, then add aviation kerosine as the hydro carbons cosolvent; Both are by weight the abundant mixing of ratio row that is 1:0.25; Under 50 ℃, standing 24 hours.
(2) base, extrude, roll
Mixed material at 50 ℃ of cylindrical bases that are pressed in advance Q120mm, with base resistance to compression under 55 ℃ of conditions of pushing machine, is become the round bar of Q22mm, will justify bar and be rolled into the oil-containing base band under 70 ℃ of conditions of calender, thickness is 150 microns.
(3) degreasing, vertical high the stretching
The oil-containing base band 260 ℃ of lower degreasings, is removed extrusion aid, and carried out longitudinal stretching for the first time, and draw ratio is 4 times; Become the degreasing base band.
(4) longitudinal stretching
With the degreasing base band, carry out longitudinal stretching for the second time under 280 ℃, obtain the longitudinal stretching Ranvier's membrane.
(5) cross directional stretch and sintering curing
On film balance, laterally stretch under 120 ℃, then 360 ℃ of lower sintering curings 50 seconds, preparation thickness was the microporous teflon membran of 20-40 micron.
(6) surface treatment
Use polyurethane, a kind of by spraying, surface transfers, foam feeding, impregnating feeding method after the microporous teflon membran surface treatment, is prepared into the grease proofing two component microporous teflon membrans of high waterproof height.
(7) high temperature hot pressing is bonding
The high grease proofing two component microporous teflon membrans of high waterproof with high temperature superpose from level to level bonding after, preparation thickness is the grease proofing polytetrafluoroethylbulked bulked sheet material of two components of high waterproof height more than 0.3 millimeter.
The sheet material of the present embodiment preparation can be from 0.3 millimeter to 9 millimeters.
Embodiment 2
A kind of high polytetrafluoroethylbulked bulked preparation of plates method of innage waterproof stitchless of refusing comprises the steps:
(1) batch mixing:
The 204 dispersion resin powder that Eastern Mountain company is produced mix, and then add aviation kerosine hydro carbons cosolvent; The three mixes by weight the ratio row that are 1:0.28; Under 50 ℃, standing 24 hours.
(2) base, extrude, roll
With mixed material, at 50 ℃ of cylindrical bases that are pressed in advance Q120mm, base is forced into the round bar of Q20mm under 60 ℃ of conditions of pushing machine, will justify bar and be rolled into the oil-containing base band under 70 ℃ of conditions of calender, thickness is 120 microns.
(3) degreasing, vertical high the stretching
The oil-containing base band 280 ℃ of lower degreasings, is removed extrusion aid, and carried out longitudinal stretching for the first time, and draw ratio is 3 times, becomes the degreasing base band.
(4) surface treatment, vertical high the stretching
With the degreasing base band, carry out longitudinal stretching for the second time under 290 ℃, obtain the longitudinal stretching Ranvier's membrane.
(5) cross directional stretch and sintering curing
On film balance, laterally stretch under 150 ℃, then 360 ℃ of lower sintering curings one minute, the preparation film thickness was the microporous teflon membran of 20-45 micron.
(6) surface treatment
Use polyurethane, a kind of by spraying, surface transfers, foam feeding, impregnating feeding method after the microporous teflon membran surface treatment, is prepared into the grease proofing two component microporous teflon membrans of high waterproof height.
(7) high temperature hot pressing is bonding
The high grease proofing two component microporous teflon membrans of high waterproof with high temperature superpose from level to level bonding after, preparation thickness is the grease proofing polytetrafluoroethylbulked bulked sheet material of two components of high waterproof height more than 0.3 millimeter.
The sheet material of the present embodiment preparation can be from 0.3 millimeter to 9.5 millimeters.
Traditional polytetrafluoroethylmaterial material density is 2.16-2.2g/cm
3And in the present invention, embodiment 1 and the high grease proofing polytetrafluoroethylbulked bulked polyfluortetraethyleseal seal plate of two components of the preparation-obtained high waterproof of embodiment 2 are a kind of for the high-performance sealed sheet material by the aerospace flight vehicle engine, and its Main Mechanical index: relative density is greater than 0.4g/cm
2, hot strength 〉=10MPa, elongation at break 〉=150%, shrinkage factor≤2%, puffed degree is higher than 60%.
Claims (10)
1. refuse the polytetrafluoroethylbulked bulked preparation of plates method of innage waterproof stitchless for one kind high, it is characterized in that, comprise the steps:
(1) batch mixing;
(2) preformed;
(3) pushing;
(4) calendering;
(5) drying;
(6) expanded;
(7) typing;
(8) heat pressure adhesive;
(9) chemical surface treatment.
2. a kind of high polytetrafluoroethylbulked bulked preparation of plates method of innage waterproof stitchless of refusing according to claim 1, is characterized in that, described batch mixing step is:
Add the hydro carbons extrusion aid to mix in the polytetrafluoroethyldispersion dispersion resin powder, under 50-70 ℃ standing 24 hours, make extrusion aid fully infiltrate through the mixture of polytetrafluoroethyldispersion dispersion resin, form material.
3. a kind of high polytetrafluoroethylbulked bulked preparation of plates method of innage waterproof stitchless of refusing according to claim 1, is characterized in that, described preformed step is:
Two or more materials is pressed in advance the cylindrical base of Q120mm under 40-50 ℃.
4. a kind of high polytetrafluoroethylbulked bulked preparation of plates method of innage waterproof stitchless of refusing according to claim 1, is characterized in that, described pushing step is:
Described cylindrical base on the pushing machine, is forced into the round bar of Q12-Q22mm under 55-60 ℃ of condition.
5. a kind of high polytetrafluoroethylbulked bulked preparation of plates method of innage waterproof stitchless of refusing according to claim 1, is characterized in that, described calendering step is:
Described round bar on calender, is rolled into the oil-containing base band under 70 ℃ of conditions.
6. a kind of high polytetrafluoroethylbulked bulked preparation of plates method of innage waterproof stitchless of refusing according to claim 1, is characterized in that, described drying and expanded step are:
Described base band 260 ℃ ~ 280 ℃ lower degreasings, is removed extrusion aid, and carried out longitudinal stretching for the first time, and draw ratio is to become the degreasing base band after 3-6 times;
With described degreasing base band, carry out longitudinal stretching for the second time under 280 ℃-300 ℃, stretching ratio is 4-8 times, obtains the longitudinal stretching Ranvier's membrane.
7. a kind of high polytetrafluoroethylbulked bulked preparation of plates method of innage waterproof stitchless of refusing according to claim 1, is characterized in that, described fixating shape step is:
With described Ranvier's membrane, laterally stretch under 120 ℃-200 ℃, then at 350 ℃ of-380 ℃ of sintering curings, namely obtain microporous teflon membran.
8. a kind of high polytetrafluoroethylbulked bulked preparation of plates method of innage waterproof stitchless of refusing according to claim 1, is characterized in that, described chemical surface treatment step is:
Polyurethane chemistry is carried out on the microporous teflon membran surface process, both obtained two component microporous teflon membrans of required high waterproof and oilproof.
9. a kind of high polytetrafluoroethylbulked bulked preparation of plates method of innage waterproof stitchless of refusing according to claim 1, is characterized in that, described adhesion step is:
Two component microporous teflon membrans of high waterproof and oilproof are carried out tight be layering, and be bonded into the polytetrafluoroethylbulked bulked sheet material of two components of high waterproof and oilproof by certain high temperature hot pressing.
10. a kind of high preparation-obtained height of the polytetrafluoroethylbulked bulked preparation of plates method of innage waterproof stitchless of refusing claimed in claim 1 is refused the polytetrafluoroethylbulked bulked sheet material of innage waterproof stitchless.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310053567.0A CN103158310B (en) | 2013-02-19 | 2013-02-19 | One is high refuses polytetrafluoroethylbulked bulked sheet material of innage waterproof stitchless and preparation method thereof |
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| CN201310053567.0A CN103158310B (en) | 2013-02-19 | 2013-02-19 | One is high refuses polytetrafluoroethylbulked bulked sheet material of innage waterproof stitchless and preparation method thereof |
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| CN103158310B CN103158310B (en) | 2015-10-21 |
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Cited By (9)
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| CN103612397A (en) * | 2013-11-22 | 2014-03-05 | 湖州森诺氟材料科技有限公司 | Microporous polytetrafluoroethylene membrane for electronic communication sealing industry and preparation method for microporous polytetrafluoroethylene membrane |
| CN103909663A (en) * | 2014-04-02 | 2014-07-09 | 湖州森诺氟材料科技有限公司 | Detergent and washing resistant, waterproof and moisture-permeable bi-component film and preparation method thereof |
| CN110239172A (en) * | 2019-05-16 | 2019-09-17 | 宿迁南航新材料与装备制造研究院有限公司 | A kind of teflon sealing material and preparation method thereof |
| CN110861340A (en) * | 2019-11-23 | 2020-03-06 | 嘉善东方氟塑有限公司 | Manufacturing method of polytetrafluoroethylene sealing sheet or sealing strip for airplane opening cover |
| CN111864153A (en) * | 2019-04-26 | 2020-10-30 | 江苏泛亚微透科技股份有限公司 | Non-breathable explosion-proof membrane, preparation method and power battery explosion-proof valve |
| CN111978584A (en) * | 2019-05-24 | 2020-11-24 | 安徽省众望科希盟科技有限公司 | Expanded polytetrafluoroethylene sealing material capable of preventing fuel oil and hydraulic oil from permeating |
| CN113059822A (en) * | 2021-03-18 | 2021-07-02 | 成都希瑞方晓科技有限公司 | Preparation method of expanded polytetrafluoroethylene with enhanced creep resistance |
| CN115819822A (en) * | 2023-02-09 | 2023-03-21 | 四川省众望科希盟科技有限公司 | Medium-resistant modified expanded polytetrafluoroethylene sealing material |
| US11702494B2 (en) | 2017-06-20 | 2023-07-18 | Zhejiang Hyproof Technology Co., Ltd | Fluorine-containing mixture material and fluorine-containing super-oleophobic microporous membrane using same as raw material, and preparation method therefor and use thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103612397B (en) * | 2013-11-22 | 2016-02-24 | 湖州森诺氟材料科技有限公司 | A kind of microporous teflon membran for electronic communication sealing industry and preparation method thereof |
| CN103612397A (en) * | 2013-11-22 | 2014-03-05 | 湖州森诺氟材料科技有限公司 | Microporous polytetrafluoroethylene membrane for electronic communication sealing industry and preparation method for microporous polytetrafluoroethylene membrane |
| CN103909663A (en) * | 2014-04-02 | 2014-07-09 | 湖州森诺氟材料科技有限公司 | Detergent and washing resistant, waterproof and moisture-permeable bi-component film and preparation method thereof |
| US11702494B2 (en) | 2017-06-20 | 2023-07-18 | Zhejiang Hyproof Technology Co., Ltd | Fluorine-containing mixture material and fluorine-containing super-oleophobic microporous membrane using same as raw material, and preparation method therefor and use thereof |
| CN111864153B (en) * | 2019-04-26 | 2021-12-21 | 江苏泛亚微透科技股份有限公司 | Non-breathable explosion-proof membrane, preparation method and power battery explosion-proof valve |
| CN111864153A (en) * | 2019-04-26 | 2020-10-30 | 江苏泛亚微透科技股份有限公司 | Non-breathable explosion-proof membrane, preparation method and power battery explosion-proof valve |
| CN110239172A (en) * | 2019-05-16 | 2019-09-17 | 宿迁南航新材料与装备制造研究院有限公司 | A kind of teflon sealing material and preparation method thereof |
| CN111978584A (en) * | 2019-05-24 | 2020-11-24 | 安徽省众望科希盟科技有限公司 | Expanded polytetrafluoroethylene sealing material capable of preventing fuel oil and hydraulic oil from permeating |
| CN111978584B (en) * | 2019-05-24 | 2022-06-14 | 安徽省众望科希盟科技有限公司 | Expanded polytetrafluoroethylene sealing material capable of preventing fuel oil and hydraulic oil from permeating |
| CN110861340A (en) * | 2019-11-23 | 2020-03-06 | 嘉善东方氟塑有限公司 | Manufacturing method of polytetrafluoroethylene sealing sheet or sealing strip for airplane opening cover |
| CN113059822A (en) * | 2021-03-18 | 2021-07-02 | 成都希瑞方晓科技有限公司 | Preparation method of expanded polytetrafluoroethylene with enhanced creep resistance |
| CN115819822A (en) * | 2023-02-09 | 2023-03-21 | 四川省众望科希盟科技有限公司 | Medium-resistant modified expanded polytetrafluoroethylene sealing material |
| CN115819822B (en) * | 2023-02-09 | 2023-04-28 | 四川省众望科希盟科技有限公司 | Medium-resistant modified expanded polytetrafluoroethylene sealing material |
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