CN103158310B - One is high refuses polytetrafluoroethylbulked bulked sheet material of innage waterproof stitchless and preparation method thereof - Google Patents
One is high refuses polytetrafluoroethylbulked bulked sheet material of innage waterproof stitchless and preparation method thereof Download PDFInfo
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- CN103158310B CN103158310B CN201310053567.0A CN201310053567A CN103158310B CN 103158310 B CN103158310 B CN 103158310B CN 201310053567 A CN201310053567 A CN 201310053567A CN 103158310 B CN103158310 B CN 103158310B
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Abstract
The invention belongs to aerospace seal field of material technology, specifically disclose and a kind of highly refuse polytetrafluoroethylbulked bulked sheet material of innage waterproof stitchless and preparation method thereof.Preparation method of the present invention comprises the processing steps such as batch mixing, preformed, pushing, calendering, drying, expanded, sizing, heat pressure adhesive, chemical surface treatment.Use the polytetrafluoroethylene (PTFE) sealing structure sheet material that the present invention prepares, there is good chemical stability, electrical insulating property, self lubricity, overcome the cold flow properties (creep) of pure PTFE stuffing materials, can not harden along with the time or the characteristic of brittle (good springiness) and high-low temperature resistant-65 to+177 DEG C, being applicable to the flat seal of various shape, is the indispensable important materials of the most advanced branches of science and modern industry.
Description
Technical field
The invention belongs to encapsulant technical field, more specifically relate to a kind of height for 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 a kind of porous material formed through techniques such as multi tension (i.e. expanding treatment), calendering, heat treatments by polytetrafluoroethylmaterial material.From the appearance, the surfacing of material, softness, but can see that under ESEM the inside of material exists the micropore of a large amount of 2 μm ~ 25 μm, its porosity can account for more than 60%.This material has following characteristics: without harm, lightweight, corrosion-resistant, resistance to environmental change, overcome the cold flow properties (creep) of pure PTFE stuffing materials, is applicable to the planar structure sealing under various load.This material seal is even, ageing-resistant, good springiness, can not to harden along with the time or brittle, and serviceability temperature scope, from-65 DEG C ~ 177 DEG C, is therefore the other encapsulant of a kind of engine of ideal Aeronautics and Astronautics aircraft.
Along with developing rapidly of China's Aero-Space cause, use amount and the scope of application of expanded polytetrafluoroethylsealing sealing plate material also constantly expand, and the part of application comprises each inspection of aircraft, inspection socket, gas-liquid parts junction etc.Along with manufacturing industry such as development boats and ships and automobile etc., the application of this product is by further genralrlization.At present both at home and abroad also not about the report of aerospace flight vehicle by 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, provide a kind of, for aerospace seal Material Field, there is the seamless polytetrafluoroethylbulked bulked sheet material that height refuses oil, high water-proof function.
Another object of the present invention is to provide this seamless polytetrafluoroethylbulked bulked preparation of plates method.
For achieving the above object, this invention takes following technical scheme:
One is high refuses the polytetrafluoroethylbulked bulked preparation of plates method of innage waterproof stitchless, comprises the steps:
(1) batch mixing;
(2) preformed;
(3) push;
(4) roll;
(5) dry;
(6) expanded;
(7) shape;
(8) bond;
(9) chemical surface treatment.
In technique scheme, described batch mixing step is:
Polytetrafluoroethyldispersion dispersion resin powder is added the mixing of hydro carbons extrusion aid, at 50-70 DEG C, leave standstill 24 hours, make extrusion aid fully infiltrate through the mixture of nano silver antimicrobials and polytetrafluoroethyldispersion dispersion resin, form material.
In technique scheme, described preforming step is:
Two or more materials is pressed at 40-50 DEG C the cylindrical base of Q120mm in advance.
In technique scheme, described pressing step is:
By described cylindrical base on pushing machine, under 55-60 DEG C of condition, be forced into the round bar of Q12-Q22mm.
In technique scheme, described calendaring processes is:
By described round bar on calender, under 70 DEG C of conditions, be rolled into oil-containing base band.
In technique scheme, described drying and bulking step are:
By the degreasing at 260 DEG C ~ 280 DEG C of described base band, remove extrusion aid, and carry out first time longitudinal stretching, draw ratio is become degreasing base band after 3-6 times;
By described degreasing base band, at 280 DEG C-300 DEG C, carry out second time longitudinal stretching, stretching ratio is 4-8 times, obtains longitudinal stretching Ranvier's membrane.
In technique scheme, described fixating shape step is:
By described Ranvier's membrane, cross directional stretch at 120 DEG C-200 DEG C, then at 350 DEG C of-380 DEG C of sintering curings, namely obtains microporous teflon membran.
In technique scheme, described chemical surface treatment step is:
Polyurethane chemistry process is carried out on microporous teflon membran surface, has both obtained the two component microporous teflon membran of required high waterproof and oilproof.
In technique scheme, described adhesion step is:
Two for high waterproof and oilproof component microporous teflon membran is carried 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, resistance to environmental change, be applicable to the flat seal of various shape, good springiness even, ageing-resistant at various loading condition lower seal, can not harden along with the time or brittle, its serviceability temperature scope is from-65 DEG C ~ 177 DEG C etc.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1
One is high refuses the polytetrafluoroethylbulked bulked preparation of plates method of innage waterproof stitchless, comprises the steps:
(1) batch mixing
By middle vast and boundless morning twilight chemicals 216G dispersed polytetrafluoroethylresin resin powder mixing, then add aviation kerosine as hydro carbons cosolvent; Both arrange abundant mixing by weight the ratio for 1:0.25; At 50 DEG C, leave standstill 24 hours.
(2) base, extrude, roll
Mixed material is pressed in advance the cylindrical base of Q120mm at 50 DEG C, by base resistance to compression under pushing machine 55 DEG C of conditions, become the round bar of Q22mm, circle bar is rolled into oil-containing base band under calender 70 DEG C of conditions, and thickness is 150 microns.
(3) degreasing, vertical high stretching
By the degreasing at 260 DEG C of oil-containing base band, remove extrusion aid, and carry out first time longitudinal stretching, draw ratio is 4 times; Become degreasing base band.
(4) longitudinal stretching
By degreasing base band, at 280 DEG C, carry out second time longitudinal stretching, obtain longitudinal stretching Ranvier's membrane.
(5) cross directional stretch and sintering curing
On film balance, cross directional stretch at 120 DEG C, then sintering curing 50 seconds at 360 DEG C, prepares the microporous teflon membran that thickness is 20-40 micron.
(6) surface treatment
With polyurethane, by the one of spraying, surface transfer, foam feeding, impregnating feeding method, after microporous teflon membran surface treatment, be prepared into the high grease proofing two component microporous teflon membrans of high waterproof.
(7) high temperature hot pressing bonding
After high for high waterproof grease proofing two component microporous teflon membran high temperature are superposed bonding from level to level, prepare the high grease proofing polytetrafluoroethylbulked bulked sheet material of two components of high waterproof that thickness is more than 0.3 millimeter.
The sheet material prepared of the present embodiment can from 0.3 millimeter to 9 millimeters.
Embodiment 2
One is high refuses the polytetrafluoroethylbulked bulked preparation of plates method of innage waterproof stitchless, comprises the steps:
(1) batch mixing:
The 204 dispersion resin powder mixing of Eastern Mountain company being produced, then add aviation kerosine hydro carbons cosolvent; Three is by weight the ratio row mixing being 1:0.28; At 50 DEG C, leave standstill 24 hours.
(2) base, extrude, roll
By mixed material, be pressed into the cylindrical base of Q120mm at 50 DEG C in advance, base be forced under pushing machine 60 DEG C of conditions the round bar of Q20mm, circle bar is rolled into oil-containing base band under calender 70 DEG C of conditions, and thickness is 120 microns.
(3) degreasing, vertical high stretching
By the degreasing at 280 DEG C of oil-containing base band, remove extrusion aid, and carry out first time longitudinal stretching, draw ratio is 3 times, becomes degreasing base band.
(4) surface treatment, vertical high stretching
By degreasing base band, at 290 DEG C, carry out second time longitudinal stretching, obtain longitudinal stretching Ranvier's membrane.
(5) cross directional stretch and sintering curing
On film balance, cross directional stretch at 150 DEG C, then sintering curing one minute at 360 DEG C, prepares the microporous teflon membran that film thickness is 20-45 micron.
(6) surface treatment
With polyurethane, by the one of spraying, surface transfer, foam feeding, impregnating feeding method, after microporous teflon membran surface treatment, be prepared into the high grease proofing two component microporous teflon membrans of high waterproof.
(7) high temperature hot pressing bonding
After high for high waterproof grease proofing two component microporous teflon membran high temperature are superposed bonding from level to level, prepare the high grease proofing polytetrafluoroethylbulked bulked sheet material of two components of high waterproof that thickness is more than 0.3 millimeter.
The sheet material prepared of the present embodiment can from 0.3 millimeter to 9.5 millimeters.
Traditional polytetrafluoroethylmaterial material density is 2.16-2.2g/cm
3and 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 high-performance sealed sheet material other for aerospace flight vehicle engine in the present invention, 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 (2)
1. highly refuse the polytetrafluoroethylbulked bulked preparation of plates method of innage waterproof, it is characterized in that, comprise the steps:
(1) batch mixing: polytetrafluoroethyldispersion dispersion resin powder is added the mixing of hydro carbons extrusion aid, leave standstill 24 hours at 50-70 DEG C, make extrusion aid fully infiltrate through the mixture of nano silver antimicrobials and polytetrafluoroethyldispersion dispersion resin, form material;
(2) preformed: the cylindrical base two or more materials being pressed at 40-50 DEG C Q120mm in advance;
(3) push: by described cylindrical base on pushing machine, under 55-60 DEG C of condition, be forced into the round bar of Q12-Q22mm;
(4) roll: by described round bar on calender, under 70 DEG C of conditions, be rolled into oil-containing base band;
(5) dry: by the degreasing at 260 DEG C ~ 280 DEG C of described base band, remove extrusion aid;
(6) expanded: removing after extrusion aid and to carry out first time longitudinal stretching, draw ratio is become degreasing base band after 3-6 times; By described degreasing base band, at 280 DEG C-300 DEG C, carry out second time longitudinal stretching, stretching ratio is 4-8 times, obtains longitudinal stretching Ranvier's membrane;
(7) shape: by described Ranvier's membrane, cross directional stretch at 120 DEG C-200 DEG C, then at 350 DEG C of-380 DEG C of sintering curings, namely obtains microporous teflon membran;
(8) chemical surface treatment: polyurethane chemistry process is carried out on microporous teflon membran surface, namely obtains two component microporous teflon membrans of required high waterproof and oilproof;
(9) heat pressure adhesive: two component microporous teflon membrans of high waterproof and oilproof are carried out tight and is layering, and be bonded into the polytetrafluoroethylbulked bulked sheet material of two components of high waterproof and oilproof by certain high temperature hot pressing.
2. the high preparation-obtained height of innage waterproof polytetrafluoroethylbulked bulked preparation of plates method of refusing of one according to claim 1 refuses the polytetrafluoroethylbulked bulked sheet material of innage waterproof.
Priority Applications (1)
| 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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| CN103158310A CN103158310A (en) | 2013-06-19 |
| CN103158310B true CN103158310B (en) | 2015-10-21 |
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Families Citing this family (9)
| 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 |
| CN103909663B (en) * | 2014-04-02 | 2016-06-01 | 湖州森诺氟材料科技有限公司 | A kind of Waterproof Breathable water-fastness for wash resistant agent two group part film and its preparation method |
| 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 |
| 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 |
| 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 |
| CN113059822B (en) * | 2021-03-18 | 2022-02-22 | 成都希瑞方晓科技有限公司 | Preparation method of expanded polytetrafluoroethylene with enhanced creep resistance |
| 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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| US3953566A (en) * | 1970-05-21 | 1976-04-27 | W. L. Gore & Associates, Inc. | Process for producing porous products |
| CN1594419A (en) * | 2004-06-24 | 2005-03-16 | 上海市塑料研究所 | Process for preparing teflon expanded sealing plate used for space air vehicles |
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2013
- 2013-02-19 CN CN201310053567.0A patent/CN103158310B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3953566A (en) * | 1970-05-21 | 1976-04-27 | W. L. Gore & Associates, Inc. | Process for producing porous products |
| CN1594419A (en) * | 2004-06-24 | 2005-03-16 | 上海市塑料研究所 | Process for preparing teflon expanded sealing plate used for space air vehicles |
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| 刘纵曙.弹性聚四氟乙烯/热塑性聚氨酯多微孔薄膜的研制.《中国优秀硕士学位论文全文数据库(电子期刊)》.2005,(第07期),B020-105. * |
| 膨体聚四氟乙烯制品的加工与应用;张正清;《有机氟工业》;20000930(第03期);42-44 * |
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