CN109664585A - A kind of PTFE compound seal backing plate and its preparation process - Google Patents
A kind of PTFE compound seal backing plate and its preparation process Download PDFInfo
- Publication number
- CN109664585A CN109664585A CN201811595874.0A CN201811595874A CN109664585A CN 109664585 A CN109664585 A CN 109664585A CN 201811595874 A CN201811595874 A CN 201811595874A CN 109664585 A CN109664585 A CN 109664585A
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- Prior art keywords
- ptfe
- hot
- backing plate
- compound seal
- support plate
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- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 68
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 68
- 150000001875 compounds Chemical class 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000005187 foaming Methods 0.000 claims abstract description 20
- 239000006260 foam Substances 0.000 claims abstract description 5
- 238000007731 hot pressing Methods 0.000 claims description 26
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 description 10
- 239000012982 microporous membrane Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 206010046996 Varicose vein Diseases 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/025—Polyolefin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/554—Wear resistance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention discloses a kind of PTFE compound seal backing plate and its preparation processes, comprising: the support plate being made of PTFE turning plate, the support plate with a thickness of 0.8mm~1.2mm, preferred thickness 1mm；And one or more layers PTFE foaming panel adjacent with the support plate side, which foams, and panel is interior to have several micropores, with a thickness of 0.8mm~1.2mm, preferred thickness 1mm.The present invention not only efficiently solves leakage problem appeared in the prior art, moreover it is possible to carry out continuity production, meet the needs of different size and nonstandard specification.
Description
Technical field
The present invention relates to composite sealing pads, more specifically to a kind of PTFE compound seal backing plate and its preparation work
Skill.
Background technique
PTFE compound seal backing plate has heat-resisting quantity, can use in -20 DEG C~200 DEG C environment, powerful oxidation corrosion resistance agent, resistance to
Oil, acid and alkali-resistance.Commonly used in high temperature, in high vacuum and hyperbaric environment, it is also adapted for oils environment.Since it is with various excellent
Performance, so PTFE Composition spacer is widely used for the departments such as petroleum, chemical industry, Aeronautics and Astronautics.
There are two types of existing common PTFE compound seal backing plates: one is PTFE turning plates, are mainly suspended and are expected using PTFE
It sinters the preform of cylindrical body after compacting into, preform is then placed into the enterprising driving of lathe and is whittled into type；Another kind is
PTFE varicosity gasket mainly uses several layers PTFE microporous membrane (every thickness degree is in 0.01mm~0.03mm), in every layer of PTFE
Then microporous membrane forms every layer of PTFE microporous membrane superimposion after applying glue.
The sealing of fluid is exactly to be moulded by being closely contacted with each other between sealing element and sealing element by the bullet of sealing element
Property deformation, reduce leakage path, realized with increasing flow resistance.But above-mentioned two kinds of gasket seal makes
With can generate the bad phenomenons such as leakage in the process, especially in the case where high temperature and pressure, leakage phenomenon is very serious.Study carefully it
Reason, the first PTFE turning plate hardness is higher, after being contacted by sealing element, when encountering high temperature and pressure situation, and sealing member
Part and by the gap between sealing element contact surface generate leakage, formed boundary leakage；And second PTFE varicosity gasket its knot
Structure is formed by multilayer PTFE microporous barrier is compound, because its internal structure has micropore, when encountering high temperature and pressure situation, fluid meeting
The infiltration leakage generated by PTFE microporous barrier body interior micropore.
Summary of the invention
In view of the above defects of the prior art, the object of the present invention is to provide a kind of PTFE compound seal backing plate and
Its preparation process not only efficiently solves leakage problem appeared in the prior art, moreover it is possible to carry out continuity production, meet
The demand of different size and nonstandard specification.
To achieve the above object, the present invention adopts the following technical scheme:
On the one hand, a kind of PTFE compound seal backing plate, comprising:
The support plate being made of PTFE turning plate, the support plate with a thickness of 0.8mm~1.2mm, preferred thickness is
1mm；And
One or more layers PTFE foaming panel adjacent with the support plate side, PTFE foaming panel are interior with several
A micropore, with a thickness of 0.8mm~1.2mm, preferred thickness 1mm.
The density of the support plate is 2.1g/cm3~2.2g/cm3。
The density of the PTFE foaming panel is 0.6g/cm3~0.8g/cm3。
On the other hand, a kind of preparation process of PTFE compound seal backing plate, comprising the following steps:
1) support plate is conveyed by conveying equipment to hot-pressing roller direction, and PTFE foaming panel is by transmission equipment also to hot pressing
The conveying of roller direction, support plate and PTFE foaming face form angle region in front of hot-pressing roller；
2) air-heater is placed in the angle region in step 1), air outlet is arranged towards hot-pressing roller direction；
3) start air-heater, conveying equipment, transmission equipment and hot-pressing roller, air-heater foams the connecing of face towards support plate and PTFE
Hot wind is blowed in contacting surface, and support plate and the PTFE foaming direct hot pressing in face are combined with each other using hot-pressing roller, it is compound to form PTFE
Sealed bolster plate.
Air purifier is also connected on the air-heater.
The air outlet temperature of the air-heater is 300 DEG C~390 DEG C.
The conveying equipment, transmission equipment on-line velocity be 1m/min~3m/min.
The pressure of the hot-pressing roller is 2kg/cm2~4kg/cm2。
The temperature of the hot-pressing roller is 350 DEG C~400 DEG C.
In the above technical solution, a kind of PTFE compound seal backing plate provided by the present invention and its preparation process, tool
There are extraordinary chemical-resistance, high temperature resistant and wearability, while it also has extraordinary creep resistance, in high temperature and pressure ring
It will not be deformed under border, fundamentally solve the boundary leakage occurred in the prior art and infiltration leakage phenomenon.In addition,
This product can achieve the purpose that continuous compound, and product continuous length meets the need of different size and nonstandard specification at 50 meters or more
It asks, in terms of the sealing operation for being particularly suitable for chemical pipeline.
Detailed description of the invention
Fig. 1 is the cross-sectional side view of PTFE compound seal backing plate of the present invention；
Fig. 2 is that schematic diagram is prepared in situ in PTFE compound seal backing plate of the present invention；
Fig. 3 is the flow chart of PTFE compound seal backing plate preparation process of the present invention.
Specific embodiment
Technical solution of the present invention is further illustrated with reference to the accompanying drawings and examples.
Incorporated by reference to shown in Fig. 1, a kind of PTFE compound seal backing plate provided by the present invention, comprising:
The support plate 1 being made of PTFE turning plate, the support plate 1 with a thickness of 0.8mm~1.2mm, preferred thickness is
1mm；And
One or more layers PTFE adjacent with 1 two sides of support plate foams panel 2, has in PTFE foaming panel
Several micropores, with a thickness of 0.8mm~1.2mm, preferred thickness 1mm.
PTFE compound seal backing plate of the present invention integrally has two layers or two layers or more of mechanism composition, according to use occasion
The different and corresponding of (difference, the difference of sealed object such as pumped (conveying) medium) use.
Preferably, the density of the support plate 1 is in 2.1g/cm3~2.2g/cm3Between, hardness with higher.
Preferably, the density of the PTFE foaming panel 2 is in 0.6g/cm3~0.8g/cm3Between, there is certain elasticity.
Incorporated by reference to shown in Fig. 2 to Fig. 3, the present invention also provides a kind of preparation processes of PTFE compound seal backing plate, including
Following steps:
1) support plate 1 by conveying equipment to 3 direction of hot-pressing roller convey, PTFE foam panel 2 by transmission equipment also to
3 direction of hot-pressing roller conveying, so that support plate 1 and PTFE foaming face 2 form angle region in front of hot-pressing roller 3；
2) air-heater 4 is placed in the angle region in step 1), air outlet 41 is arranged towards 3 direction of hot-pressing roller；
3) start air-heater 4, conveying equipment, transmission equipment and hot-pressing roller 3, the air outlet 41 of air-heater 4 towards support plate 1 with
Hot wind is blowed on the contact surface in PTFE foaming face 2, recycles hot-pressing roller 3 that the support plate 1 and PTFE foaming direct hot pressing in face 2 is compound
Together, PTFE compound seal backing plate is formed.
Preferably, be also connected with air purifier 5 on the air-heater 4, using air-heater 4 not only can by support plate 1 with
Sundries is blown away on the contact surface in PTFE foaming face 2, therefore, installs the hot wind for blowing out air outlet 41 after air purifier 5 additional more
It is pure, it can be warming up to 600 DEG C~800 DEG C or so of temperature in air-heater 4, make the leaving air temp of air outlet 41 300 DEG C~390
Between DEG C, support plate 1 and the contact surface in PTFE foaming face 2 can also be made to achieve the purpose that preheating.
Preferably, the on-line velocity of the conveying equipment, transmission equipment is 1m/min~3m/min, according to manufacture craft item
Part is adjusted accordingly.
Preferably, the pressure of the hot-pressing roller is 2kg/cm2~4kg/cm2, temperature is 350 DEG C~400 DEG C,.
In conclusion PTFE compound seal backing plate of the invention has extraordinary chemical-resistance, high temperature resistant and wear-resisting
Property, while it also has extraordinary creep resistance, will not be deformed under high temperature and high pressure environment, especially suitable for chemical industry
Field of sealing technology.And preparation of the PTFE compound seal backing plate preparation process than the prior art of the invention more automates, and utilizes heat
Wind heats compound combination, to save labour.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention,
And be not used as limitation of the invention, as long as the change in spirit of the invention, to embodiment described above
Change, modification will all be fallen within the scope of claims of the present invention.
Claims (9)
1. a kind of PTFE compound seal backing plate characterized by comprising
The support plate being made of PTFE turning plate, the support plate with a thickness of 0.8mm~1.2mm, preferred thickness 1mm；With
And
One or more layers PTFE foaming panel adjacent with the support plate side, which foams, and panel is interior to have several micro-
Hole, with a thickness of 0.8mm~1.2mm, preferred thickness 1mm.
2. a kind of PTFE compound seal backing plate as described in claim 1, it is characterised in that: the density of the support plate is
2.1g/cm3~2.2g/cm3。
3. a kind of PTFE compound seal backing plate as described in claim 1, it is characterised in that: the density of the PTFE foaming panel
For 0.6g/cm3~0.8g/cm3。
4. a kind of preparation process of the PTFE compound seal backing plate as described in claim any one of 1-3, which is characterized in that including with
Lower step:
1) support plate is conveyed by conveying equipment to hot-pressing roller direction, and PTFE foaming panel is by transmission equipment also to hot-pressing roller side
To conveying, support plate and PTFE foaming face form angle region in front of hot-pressing roller；
2) air-heater is placed in the angle region in step 1), air outlet is arranged towards hot-pressing roller direction；
3) start air-heater, conveying equipment, transmission equipment and hot-pressing roller, contact surface of the air-heater towards support plate and PTFE foaming face
On blow hot wind, using hot-pressing roller by support plate and PTFE foaming the direct hot pressing in face be combined with each other, formed PTFE compound seal
Backing plate.
5. a kind of preparation process of PTFE compound seal backing plate as claimed in claim 4, it is characterised in that: on the air-heater
Also it is connected with air purifier.
6. a kind of preparation process of PTFE compound seal backing plate as claimed in claim 5, it is characterised in that: the air-heater
Air outlet temperature is 300 DEG C~390 DEG C.
7. a kind of preparation process of PTFE compound seal backing plate as claimed in claim 4, it is characterised in that: the conveying is set
Standby, transmission equipment on-line velocity is 1m/min~3m/min.
8. a kind of preparation process of PTFE compound seal backing plate as claimed in claim 4, it is characterised in that: the hot-pressing roller
Pressure is 2kg/cm2~4kg/cm2。
9. a kind of preparation process of PTFE compound seal backing plate as claimed in claim 4, it is characterised in that: the hot-pressing roller
Temperature is 350 DEG C~400 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811595874.0A CN109664585A (en) | 2018-12-26 | 2018-12-26 | A kind of PTFE compound seal backing plate and its preparation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811595874.0A CN109664585A (en) | 2018-12-26 | 2018-12-26 | A kind of PTFE compound seal backing plate and its preparation process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109664585A true CN109664585A (en) | 2019-04-23 |
Family
ID=66147207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811595874.0A Pending CN109664585A (en) | 2018-12-26 | 2018-12-26 | A kind of PTFE compound seal backing plate and its preparation process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109664585A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111186196A (en) * | 2020-02-25 | 2020-05-22 | 江苏金由新材料有限公司 | Single-side microporous polytetrafluoroethylene film and preparation method and application thereof |
| CN114179487A (en) * | 2021-12-15 | 2022-03-15 | 芜湖荣基密封系统有限公司 | Three-in-one composite processing equipment for processing sealing gasket |
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| US20010034414A1 (en) * | 1997-09-05 | 2001-10-25 | Effenberger John A. | Fluoropolymeric composition |
| JP2002036376A (en) * | 2000-07-25 | 2002-02-05 | Nitto Denko Corp | Method for manufacturing modified polytetrafluoroethylene film |
| CN2931107Y (en) * | 2006-07-21 | 2007-08-08 | 潘永椿 | Composite plastic pad |
| CN101608042A (en) * | 2009-07-10 | 2009-12-23 | 上海骏焱化工材料有限公司 | Micropore polyfluortetraethyleseal seal plate and preparation method thereof |
| CN202378371U (en) * | 2011-12-05 | 2012-08-15 | 浙江国泰密封材料股份有限公司 | Flexible polytetrafluoroethylene sealing plate |
| CN105402403A (en) * | 2015-12-08 | 2016-03-16 | 四川成发普睿玛机械工业制造有限责任公司 | Sealing gasket with controllable deformation amount |
| CN205207654U (en) * | 2015-12-29 | 2016-05-04 | 慈溪卡希尔密封材料有限公司 | Closing plate |
| CN107140265A (en) * | 2017-05-31 | 2017-09-08 | 重庆豪杰食品有限公司 | The adjustable sealing machine of seal widths |
-
2018
- 2018-12-26 CN CN201811595874.0A patent/CN109664585A/en active Pending
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|---|---|---|---|---|
| US20010034414A1 (en) * | 1997-09-05 | 2001-10-25 | Effenberger John A. | Fluoropolymeric composition |
| JP2002036376A (en) * | 2000-07-25 | 2002-02-05 | Nitto Denko Corp | Method for manufacturing modified polytetrafluoroethylene film |
| CN2931107Y (en) * | 2006-07-21 | 2007-08-08 | 潘永椿 | Composite plastic pad |
| CN101608042A (en) * | 2009-07-10 | 2009-12-23 | 上海骏焱化工材料有限公司 | Micropore polyfluortetraethyleseal seal plate and preparation method thereof |
| CN202378371U (en) * | 2011-12-05 | 2012-08-15 | 浙江国泰密封材料股份有限公司 | Flexible polytetrafluoroethylene sealing plate |
| CN105402403A (en) * | 2015-12-08 | 2016-03-16 | 四川成发普睿玛机械工业制造有限责任公司 | Sealing gasket with controllable deformation amount |
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Non-Patent Citations (1)
| Title |
|---|
| 谭本忠, 山东科技出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111186196A (en) * | 2020-02-25 | 2020-05-22 | 江苏金由新材料有限公司 | Single-side microporous polytetrafluoroethylene film and preparation method and application thereof |
| CN114179487A (en) * | 2021-12-15 | 2022-03-15 | 芜湖荣基密封系统有限公司 | Three-in-one composite processing equipment for processing sealing gasket |
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Application publication date: 20190423 |