CN107487058A - A kind of method, apparatus and sealing article of the expanded PTFE seal stock quickly manufactured - Google Patents
A kind of method, apparatus and sealing article of the expanded PTFE seal stock quickly manufactured Download PDFInfo
- Publication number
- CN107487058A CN107487058A CN201710722761.1A CN201710722761A CN107487058A CN 107487058 A CN107487058 A CN 107487058A CN 201710722761 A CN201710722761 A CN 201710722761A CN 107487058 A CN107487058 A CN 107487058A
- Authority
- CN
- China
- Prior art keywords
- seal stock
- expanded ptfe
- film
- film roll
- quickly manufactured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 75
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 75
- 238000007789 sealing Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000010408 film Substances 0.000 claims abstract description 72
- 238000003475 lamination Methods 0.000 claims abstract description 33
- 238000005520 cutting process Methods 0.000 claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims abstract description 23
- 238000000576 coating method Methods 0.000 claims abstract description 23
- 230000000694 effects Effects 0.000 claims abstract description 10
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 9
- 239000010409 thin film Substances 0.000 claims abstract description 3
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 230000009467 reduction Effects 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 7
- 230000002209 hydrophobic effect Effects 0.000 claims description 5
- 230000000284 resting effect Effects 0.000 claims description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 239000005977 Ethylene Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 239000000463 material Substances 0.000 abstract description 9
- 230000032683 aging Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000036316 preload Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000003814 drug Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000008393 encapsulating agent Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229920001410 Microfiber Polymers 0.000 description 1
- 206010046996 Varicose vein Diseases 0.000 description 1
- 229920006266 Vinyl film Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000003658 microfiber Substances 0.000 description 1
- 239000002365 multiple layer Substances 0.000 description 1
- 210000003739 neck Anatomy 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding 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
- 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
- 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
- B32B27/08—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 of synthetic resin
-
- 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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
-
- 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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
-
- 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
- B32B2307/552—Fatigue strength
-
- 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
- B32B2581/00—Seals; Sealing equipment; Gaskets
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Laminated Bodies (AREA)
- Gasket Seals (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention discloses a kind of method, apparatus and sealing article of the expanded PTFE seal stock quickly manufactured, method includes, and by eptfe film, continuous volume is bundled into multilayer volume coating cylinder under tensile state；Cutting multilayer volume coating cylinder complanation shape film roll bag lamination vertically；The carbochain of the periphery for the plane film roll bag lamination that tensioning, fixed cutting are formed, progress thermal finalization, thermal finalization while polytetrafluoroethylene (PTFE) micel connects under molecular force effect；The thickness of Compressed Thin film roll bag lamination.By the above-mentioned means, the sheet material prepared with methods and apparatus of the present invention has bigger tensile strength, bigger bolt presses power can be kept in use, so as to provide relatively reliable sealing property；Seal stock improves sealing reliability, resistance to environmental aging, extends usage time, and reduces the maintenance cost for locking and changing pad again；Seal stock uniformity is higher, and problem is less, and production efficiency improves 10 times.
Description
Technical field
The present invention relates to sealing article field, more particularly to a kind of expanded PTFE seal stock quickly manufactured
Method, apparatus and sealing article.
Background technology
Leakage is the principal mode of pipe flange failure, and it is with sealing structure pattern, the rigidity of connected piece, the property of seal
The many factors such as energy, operation and installation are relevant.Pad is the main seal of flange connection, thus it is also to protect correctly to select pad
The key that the blue connection of demonstration does not leak.Flange gasket is according to corrosivity, temperature, pressure and the flange seal of pipeline institute pumped (conveying) medium
The form in face is many from species.Common encapsulant has rubber asbestos gasket, rubber blanket, spiral wound gasket, aramid fiber pad, stone
Cotton pad, soft graphite, polytetrafluoroethylene (PTFE) etc. are only used for the engineering pipeline sealing of low and middle-end.E-PTFE is used in encapsulant
The novel seal pad of vinyl film manufacture has extensive purposes, and W. L. Gore ＆ Associates, Inc. is for a long time food medicine, Aero-Space and nuclear power
Stand, the high-end industry such as naval vessel provides all kinds of sealings such as novel seal pad and the packing of eptfe membrane manufacture and solved
Scheme, monopolization controls most of market share in China and other areas and price is up to 8000 yuan/square metre, therefore to this
Sealing material is necessary to implement production domesticization.
Have expanded PTFE at present using the sheet material that carvel built is done in layer, the method low production efficiency（Cause
Film thickness only has 0.01-0.05mm, and completing thickness up to the 1mm of a large area sheet material needs nearly 1h to tile completion）,
Gauffer interlayer often occurs under air agitation because film is very thin during tiling so that it is in uneven thickness, easily it is layered between film layer,
Compression resilience is poor after plane compresses shaping, and the seal stock quality conformance of this carvel built is poor.
The content of the invention
The present invention solves the technical problem of provide a kind of expanded PTFE seal stock quickly manufactured
Method, apparatus and sealing article, there is high uniformity and accuracy, the Density Distribution of sealing article is more uniform, sealing
Effect is more consistent, more reliable.
In order to solve the above technical problems, one aspect of the present invention is：There is provided and a kind of quickly manufacture
The method of expanded PTFE seal stock, comprises the following steps：
1）By eptfe film, continuous volume is bundled into multilayer volume coating cylinder under tensile state；
2）Cutting multilayer volume coating cylinder complanation shape film roll bag lamination vertically；
3）The periphery for the plane film roll bag lamination that tensioning, fixed cutting are formed, carries out thermal finalization, thermal finalization while polytetrafluoro
The carbochain of ethylene molecule group connects under molecular force effect；
4）The thickness of Compressed Thin film roll bag lamination, that is, complete the preparation of seal stock.
In a preferred embodiment of the present invention, step 3）In, thermal finalization is in the environment of temperature is 270 DEG C -310 DEG C
Destressing is deposited -2.5 hours 1.8 hours.
In a preferred embodiment of the present invention, step 4）The compression of middle film roll bag laminated thickness be temperature be 270 DEG C-
By thickness reduction 8%-16% in 310 DEG C of environment.
In a preferred embodiment of the present invention, the thickness of the seal stock is 0.8-3.5mm.
The present invention also designs a kind of device of the expanded PTFE seal stock quickly manufactured, includes unreeling successively
Roller, pinch rolls, roller, guillotine, quick-speed jigs, baking oven and roller press, the film of expanded PTFE is through let off roll
Output, continuous volume bag to certain thickness, forms multilayer volume coating cylinder on roller after being tensioned by pinch rolls, guillotine along
Multilayer is rolled up the cutting of coating cylinder into plane film roll bag lamination by axial cutting, thin with the side tensioning fixed pan shape of quick-speed jigs four
Film roll bag lamination, thermal finalization destressing storage is then carried out in an oven；Plane film roll bag lamination is finally subjected to thickness
Compression, rolled on roller press to the thickness of seal stock.
In a preferred embodiment of the present invention, the rotating speed of roller is 100 ~ 500 turns/min.
In a preferred embodiment of the present invention, the temperature in baking oven is 270 DEG C -310 DEG C, the operating temperature of roller press
For 270 DEG C -310 DEG C.
In a preferred embodiment of the present invention, the destressing resting period is -2.5 hours 1.8 hours.
In a preferred embodiment of the present invention, the film of expanded PTFE or the e-PTFE for hydrophobic oleophobic
The modified film film of ethene.
The invention further relates to a kind of sealing article, sealing article is provided with to be prepared using method any claim 1-4
The seal stock formed.
The beneficial effects of the invention are as follows：The seal stock of the present invention has bigger tensile strength, can protect in use
Bigger bolt presses power is held, so as to provide relatively reliable sealing property, especially in thermal cycle and the condition of higher temperature
Under；Seal stock improves sealing reliability, resistance to environmental aging, extends usage time, and reduces and lock and change pad again
Maintenance cost；Seal stock uniformity is higher, and problem is less, and production efficiency improves 10 times；The price of seal stock is import
60% ~ 70%, can further reduce the manufacturing cost of customer engineering and equipment so that consumer product is more competitive.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings other
Accompanying drawing, wherein：
Fig. 1 is that the structure of a preferred embodiment of the expanded PTFE seal stock of the invention quickly manufactured on roller is shown
It is intended to；
Fig. 2 is the structure of the preferred embodiment after the expanded PTFE seal stock axial direction cutting that the present invention quickly manufactures
Schematic diagram；
Fig. 3 is the structural representation of a preferred embodiment of the device for the expanded PTFE seal stock that the present invention quickly manufactures
Figure；
The mark of each part is as follows in accompanying drawing：1st, multilayer volume coating cylinder, 2, plane film roll bag lamination, 3, let off roll, 4,
Withdrawing roll, 5, roller, 6, guillotine, 7, quick-speed jigs, 8, baking oven, 9, roller press.
Embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example is only the part of the embodiment of the present invention, rather than whole embodiments.It is common based on the embodiment in the present invention, this area
All other embodiment that technical staff is obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
Before the seal stock of the present invention is prepared, eptfe film, expanded PTFE are first prepared
The core technology of the manufacture of film is：First polytetrafluoroethyldispersion dispersion resin is mixed with liquid extrusion aid and coloring agent, in 30-40
Insulation maturation is carried out in the environment of DEG C, then is pressed into cylinder blank, cylinder blank is laminated by rolling process, it is heated
Extrusion aid is sloughed, then carries out simple tension, biaxial tension, then thermal finalization, cooling, winding, e-PTFE second is finally made
Alkene film.
Eptfe film is a kind of macromolecule new material film with specific function high added value, is special
Made of technique biaxial tension, the microfibre of the film constitutes the multifilament layer abnormity in 0.1 μm of inside and outside penetrating -18 μm of aperture
Micropore；The film of expanded PTFE has been compounded to form the encapsulant of various thickness through multiple-layer stacked.
Eptfe film has natural chemical inertness, water proofing property, heat endurance and higher mechanical strength,
These characteristics cause seal solution it is reliably ageing-resistant, sealing medium is not contaminated, in addition exposed to eroding chemical,
Also can effectively it be sealed when in friction, high temperature or extremely low temperature.
It is made of 100% expanded PTFE, the technology can create the e-PTFE with high dilation
Ethene sealing article.The excellent expansion of sealing article or compression rebound realize the tensile strength and sealing stability of brilliance, tall and erect
Creep resistant more and resistance to cold flow energy, so as to realize excellent performance in harsh application.
Embodiment 1：
A kind of method of the expanded PTFE seal stock quickly manufactured, comprises the following steps：
1）By eptfe film, continuous volume is bundled into multilayer volume coating cylinder 1 under tensile state, as shown in Figure 1；
2）The complanation shape film roll bag lamination 2 of cutting multilayer volume coating cylinder 1 vertically, as shown in Figure 2；
3）The periphery for the plane film roll bag lamination 2 that tensioning, fixed cutting are formed, being gone in the environment of being 270 DEG C in temperature should
Power is deposited 1.8 hours, and the carbochain of thermal finalization while polytetrafluoroethylene (PTFE) micel connects under molecular force effect；
4）By thickness reduction 8% in the environment that temperature is 270 DEG C, that is, complete the preparation of seal stock.
Carbochain through the polytetrafluoroethylene (PTFE) micel in high hot rolling caudacoria can molecular force effect under connect it is more,
So that the combination of film roll bag lamination is closer, formation is integral and not stratified, and this volume bag method production efficiency improves 10 times,
The uniformity of product is more preferable.
100% expanded PTFE seal stock of various thickness series can be produced with the method, meets food
The special seal requirement of the high-end engineering such as medicine, Aero-Space and nuclear power station, naval vessel.
The film of expanded PTFE or for hydrophobic oleophobic expanded PTFE modified film film.
The thickness of the seal stock is 0.8-3.5mm.Resilience is carried out on seal stock in 1-3mm thickness range
The experiment of rate and leakage rate：Under preload pressure 17.25MPa loads, sheet material compression ratio removes rebound degree after load up to 45 ± 5%
>10%；Tested using the helium of medium 99.9%, preload pressure 17.25MPa, the MPa of test pressure 4 load under, leakage
Rate<1×10-3cm3/s。
A kind of device of the expanded PTFE seal stock quickly manufactured, as shown in figure 3, successively include let off roll 3,
Pinch rolls 4, roller 5, guillotine 6, quick-speed jigs 7, baking oven 8 and roller press 9, the film of expanded PTFE is through unreeling
Roller 3 exports, and continuous volume bag to certain thickness, forms multilayer volume coating cylinder 1, roller 5 on roller 5 after being tensioned by pinch rolls 4
Rotating speed be 100 turns/min, guillotine 6 axially is rolled up the cutting of coating cylinder 1 and is folded into plane film roll bag by cutting by multilayer
Layer 2, with the side tensioning fixed pan shape film roll bag lamination 2 of quick-speed jigs 7 four, thermal finalization destressing is then carried out in baking oven 8
Deposit, the temperature in baking oven 8 is 270 DEG C, and the destressing resting period is 1.8 hours；Finally plane film roll bag lamination 2 is entered
Row thickness reduction, to the thickness of seal stock, the operating temperature of roller press 9 is 270 DEG C for rolling on roller press 9.
Embodiment 2:
A kind of method of the expanded PTFE seal stock quickly manufactured, comprises the following steps：
1）By eptfe film, continuous volume is bundled into multilayer volume coating cylinder under tensile state；
2）Cutting multilayer volume coating cylinder complanation shape film roll bag lamination 2 vertically；
3）The periphery for the plane film roll bag lamination 2 that tensioning, fixed cutting are formed, being gone in the environment of being 290 DEG C in temperature should
Power is deposited 2 hours, and the carbochain of thermal finalization while polytetrafluoroethylene (PTFE) micel connects under molecular force effect；
4）By thickness reduction 12% in the environment that temperature is 300 DEG C, that is, complete the preparation of seal stock.
Carbochain through the polytetrafluoroethylene (PTFE) micel in high hot rolling caudacoria can molecular force effect under connect it is more,
So that the combination of film roll bag lamination is closer, formation is integral and not stratified, and this volume bag method production efficiency improves 10 times,
The uniformity of product is more preferable.
100% expanded PTFE seal stock of various thickness series can be produced with the method, meets food
The special seal requirement of the high-end engineering such as medicine, Aero-Space and nuclear power station, naval vessel.
The film of expanded PTFE or for hydrophobic oleophobic expanded PTFE modified film film.
The thickness of the seal stock is 0.8-3.5mm.Resilience is carried out on seal stock in 1-3mm thickness range
The experiment of rate and leakage rate：Under preload pressure 17.25MPa loads, sheet material compression ratio removes rebound degree after load up to 45 ± 5%
>10%；Tested using the helium of medium 99.9%, preload pressure 17.25MPa, the MPa of test pressure 4 load under, leakage
Rate<1×10-3cm3/s。
A kind of device of the expanded PTFE seal stock quickly manufactured, successively including let off roll 3, pinch rolls 4, rolling
Cylinder 5, guillotine 6, quick-speed jigs 7, baking oven 8 and roller press 9, the film of expanded PTFE export through let off roll 3, by
Pinch rolls 4 be tensioned after on roller continuous volume bag to certain thickness, form multilayer volume coating cylinder, the rotating speed of roller for 300 turns/
Min, axially multilayer is rolled up the cutting of coating cylinder into plane film roll bag lamination 2 to guillotine 6 by cutting, with quick-speed jigs 7
Four side tensioning fixed pan shape film roll bag laminations 2, thermal finalization destressing storage is then carried out in baking oven 8, the temperature in baking oven 8
Spend for 290 DEG C, the destressing resting period is 2 hours；Plane film roll bag lamination 2 is finally subjected to thickness reduction, in roller
To the thickness of seal stock, the operating temperature of roller press 9 is 300 DEG C for rolling on press 9.
Embodiment 3：
A kind of method of the expanded PTFE seal stock quickly manufactured, comprises the following steps：
1）By eptfe film, continuous volume is bundled into multilayer volume coating cylinder under tensile state；
2）Cutting multilayer volume coating cylinder complanation shape film roll bag lamination 2 vertically；
3）The periphery for the plane film roll bag lamination 2 that tensioning, fixed cutting are formed, being gone in the environment of being 310 DEG C in temperature should
Power is deposited 2.5 hours, and the carbochain of thermal finalization while polytetrafluoroethylene (PTFE) micel connects under molecular force effect；
4）By thickness reduction 16% in the environment that temperature is 310 DEG C, that is, complete the preparation of seal stock.
Carbochain through the polytetrafluoroethylene (PTFE) micel in high hot rolling caudacoria can molecular force effect under connect it is more,
So that the combination of film roll bag lamination is closer, formation is integral and not stratified, and this volume bag method production efficiency improves 10 times,
The uniformity of product is more preferable.
100% expanded PTFE seal stock of various thickness series can be produced with the method, meets food
The special seal requirement of the high-end engineering such as medicine, Aero-Space and nuclear power station, naval vessel.
The film of expanded PTFE or for hydrophobic oleophobic expanded PTFE modified film film.
The thickness of the seal stock is 0.8-3.5mm.Resilience is carried out on seal stock in 1-3mm thickness range
The experiment of rate and leakage rate：Under preload pressure 17.25MPa loads, sheet material compression ratio removes rebound degree after load up to 45 ± 5%
>10%；Tested using the helium of medium 99.9%, preload pressure 17.25MPa, the MPa of test pressure 4 load under, leakage
Rate<1×10-3cm3/s。
A kind of device of the expanded PTFE seal stock quickly manufactured, successively including let off roll 3, pinch rolls 4, rolling
Cylinder 5, guillotine 6, quick-speed jigs 7, baking oven 8 and roller press 9, the film of expanded PTFE export through let off roll 3, by
Continuous volume bag is to certain thickness on roller 5 after pinch rolls 4 is tensioned, and formation multilayer volume coating cylinder, the rotating speed of roller is 500
Turn/min, axially multilayer is rolled up the cutting of coating cylinder into plane film roll bag lamination 2 to guillotine 6 by cutting, uses quick clip
Have 7 four side tensioning fixed pan shape film roll bag laminations 2, thermal finalization destressing storage is then carried out in baking oven 8, in baking oven 8
Temperature be 310 DEG C, the destressing resting period be 2.5 hours；Plane film roll bag lamination 2 is finally subjected to thickness reduction,
To the thickness of seal stock, the operating temperature of roller press 9 is 310 DEG C for rolling on roller press 9.
A kind of sealing article, sealing article include the seal stock that the method and apparatus in embodiment 1-3 are prepared.It is close
The preparation method of envelope product includes：Expanded PTFE seal stock is first prepared, processes preceding preparation, then using accurate digital control
Die-cutting machine Blanking Shaping, secondly waste discharge material, inspection are arranged, and finally packaging is delivered to customer.
This based article includes plate gasket, universal pipes pad, the scene shaping novelty such as banding pad and joint sealing member
Sealing article series of products.
The seal stock for using methods and apparatus of the present invention to be prepared will be food medicine, and Aero-Space and industry carry
For all kinds of sealing solutions such as various pads and packing.With specific function, high added value, that surface tension is lower is high-new
Product, there will be good superiority of effectiveness, monopolization of the offshore company to China market will be broken, cut down its market share amount, should
Product will substitute inlet and outlet, advantageously reduce the cost of China's engineering equipment and improve its performance reliability, be advantageous to me
State's engineering equipment lifting export competitiveness so that engineering equipment safe and reliable operation important in inhibiting.
The seal stock of the present invention has remarkable creep resistant and resistance to cold flow energy, and sheet material of the invention has bigger resist
Tensile strength, therefore, deformed compared with other pads, after compression small（Thickness and width）.Therefore, it can keep more in use
Big bolt presses power, so as to provide relatively reliable sealing property, especially under conditions of thermal cycle and higher temperature.
Wherein, expanded PTFE has natural chemical inertness, water proofing property, heat endurance and higher machinery strong
Degree, the sealing solution of these characteristic let us is reliability and durability, or even exposed to eroding chemical, friction, high temperature or
Also can effectively it be sealed when in extremely low temperature.The temperature range that the eptfe film sealing article can be born is -269 °C
To 315 °C（- 452 °F to 600 °F）, this causes them to can be applied to multiple fields.
Deform few after the width compression of the eptfe film sealing article, pad can be avoided to squeeze into pipeline and right
Technique adversely affects.
This sealed product improves sealing reliability, resistance to environmental aging, extends usage time, and reduces locking again and more
Change the maintenance cost of pad.
The very reliable sealing property of expanded PTFE seal stock, compressive property, which is tested, to be shown, the varicosity poly- four
PVF sealing article shows extremely outstanding in terms of the various extreme conditions of industrial flange sealing are born.Under the high temperature conditions
Install and in use, this pad can provide higher sealing reliability safety coefficient.
The expanded PTFE sealing article has chemical inertness, either in highly basic, strong acid environment, also or solvent
In, it can realize lasting sealing effectiveness.It can be resistant to All Media（PH value range 0-14）Corrosion it is pollution-free, but melt/
Except dissolving alkali metal and simple substance fluoride.
Expanded PTFE seal stock uniformity is higher, and problem is less, and production efficiency improves 10 times.
Our company's manufacturing process has high uniformity and accuracy, therefore, with other expanded polytetrafluoroethylplate plate shapes
Pad is compared, and the Density Distribution of the expanded PTFE sealing article is more uniform.This makes sealing effectiveness more consistent, more may be used
Lean on.
Different from hard tetrafluoro or intefused tetratiuorine, it is uneven that the expanded PTFE sealing article can comply with common flange
Whole degree.This pad can avoid rebuilding flange surface, expand the scope of application, and realize extremely reliable sealing effectiveness, therefore
It is more easy to realize failure-free operation.
The price of expanded PTFE seal stock is the 60%-70% of import, can further reduce client's " engineering
And equipment " manufacturing cost so that consumer product is more competitive.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright description is made, or directly or indirectly it is used in other related technology necks
Domain, it is included within the scope of the present invention.
Claims (10)
- A kind of 1. method of the expanded PTFE seal stock quickly manufactured, it is characterised in that comprise the following steps：1）By eptfe film, continuous volume is bundled into multilayer volume coating cylinder under tensile state；2）Cutting multilayer volume coating cylinder complanation shape film roll bag lamination vertically；3）The periphery for the plane film roll bag lamination that tensioning, fixed cutting are formed, carries out thermal finalization, thermal finalization while polytetrafluoro The carbochain of ethylene molecule group connects under molecular force effect；4）The thickness of Compressed Thin film roll bag lamination, that is, complete the preparation of seal stock.
- 2. the method for the expanded PTFE seal stock according to claim 1 quickly manufactured, it is characterised in that step Rapid 3）In, thermal finalization is that destressing is deposited -2.5 hours 1.8 hours in the environment of temperature is 270 DEG C -310 DEG C.
- 3. the method for the expanded PTFE seal stock according to claim 1 quickly manufactured, it is characterised in that：Step Rapid 4）Middle film roll bag laminated thickness compression is by thickness reduction 8%-16% in the environment that temperature is 270 DEG C -310 DEG C.
- 4. the method for the expanded PTFE seal stock according to claim 1 quickly manufactured, it is characterised in that：Institute The thickness for stating seal stock is 0.8-3.5mm.
- A kind of 5. device of the expanded PTFE seal stock quickly manufactured, it is characterised in that successively including let off roll, Withdrawing roll, roller, guillotine, quick-speed jigs, baking oven and roller press, the film of expanded PTFE export through let off roll, Continuous volume bag to certain thickness, forms multilayer volume coating cylinder, guillotine is axially on roller after being tensioned by pinch rolls Multilayer is rolled up the cutting of coating cylinder into plane film roll bag lamination by cutting, with the side tensioning fixed pan shape film roll of quick-speed jigs four Bag lamination, thermal finalization destressing storage is then carried out in an oven；Plane film roll bag lamination is finally subjected to thickness reduction, Rolled on roller press to the thickness of seal stock.
- 6. the device of the expanded PTFE seal stock according to claim 5 quickly manufactured, it is characterised in that rolling The rotating speed of cylinder turns/min for 100-500.
- 7. the device of the expanded PTFE seal stock according to claim 5 quickly manufactured, it is characterised in that dry Temperature in case is 270 DEG C -310 DEG C, and the operating temperature of roller press is 270 DEG C -310 DEG C.
- 8. the device of the expanded PTFE seal stock according to claim 5 quickly manufactured, it is characterised in that go The stress resting period is -2.5 hours 1.8 hours.
- 9. the device of the expanded PTFE seal stock according to claim 5 quickly manufactured, it is characterised in that swollen The film of body polytetrafluoroethylene (PTFE) or for hydrophobic oleophobic expanded PTFE modified film film.
- A kind of 10. sealing article, it is characterised in that sealing article be provided with prepared using any methods of claim 1-4 and Into seal stock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710722761.1A CN107487058B (en) | 2017-08-22 | 2017-08-22 | Method and device for rapidly manufacturing expanded polytetrafluoroethylene sealing sheet and sealing product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710722761.1A CN107487058B (en) | 2017-08-22 | 2017-08-22 | Method and device for rapidly manufacturing expanded polytetrafluoroethylene sealing sheet and sealing product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107487058A true CN107487058A (en) | 2017-12-19 |
| CN107487058B CN107487058B (en) | 2023-11-14 |
Family
ID=60646644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710722761.1A Active CN107487058B (en) | 2017-08-22 | 2017-08-22 | Method and device for rapidly manufacturing expanded polytetrafluoroethylene sealing sheet and sealing product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107487058B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5551706A (en) * | 1993-04-20 | 1996-09-03 | W. L. Gore & Associates, Inc. | Composite gasket for sealing flanges and method for making and using same |
| WO2005095828A1 (en) * | 2004-03-10 | 2005-10-13 | Gore Enterprise Holdings, Inc. | Low stress to seal expanded ptfe gasket tape |
| CN101708655A (en) * | 2009-11-24 | 2010-05-19 | 曾燕飞 | Method for manufacturing expanded polytetrafluoroethylene plate |
| CN104015372A (en) * | 2014-01-09 | 2014-09-03 | 宁波氟纳斯氟材科技有限公司 | Production process and device of expanded polytetrafluoroethylene board |
| CN207310752U (en) * | 2017-08-22 | 2018-05-04 | 江苏泛亚微透科技股份有限公司 | A kind of device and sealing article of the expanded PTFE seal stock quickly manufactured |
-
2017
- 2017-08-22 CN CN201710722761.1A patent/CN107487058B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5551706A (en) * | 1993-04-20 | 1996-09-03 | W. L. Gore & Associates, Inc. | Composite gasket for sealing flanges and method for making and using same |
| WO2005095828A1 (en) * | 2004-03-10 | 2005-10-13 | Gore Enterprise Holdings, Inc. | Low stress to seal expanded ptfe gasket tape |
| CN101708655A (en) * | 2009-11-24 | 2010-05-19 | 曾燕飞 | Method for manufacturing expanded polytetrafluoroethylene plate |
| CN104015372A (en) * | 2014-01-09 | 2014-09-03 | 宁波氟纳斯氟材科技有限公司 | Production process and device of expanded polytetrafluoroethylene board |
| CN207310752U (en) * | 2017-08-22 | 2018-05-04 | 江苏泛亚微透科技股份有限公司 | A kind of device and sealing article of the expanded PTFE seal stock quickly manufactured |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107487058B (en) | 2023-11-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7361398B2 (en) | Low stress to seal ePTFE gasket material | |
| CN101535702B (en) | A low-stress molded gasket and method of making same | |
| CN207310752U (en) | A kind of device and sealing article of the expanded PTFE seal stock quickly manufactured | |
| CN112044278A (en) | Preparation method of PTFE microporous membrane with multilayer structure | |
| CN106826136A (en) | A kind of stainless steel pipes production procedure | |
| JP2013015225A (en) | Gasket | |
| CN107487058A (en) | A kind of method, apparatus and sealing article of the expanded PTFE seal stock quickly manufactured | |
| CN105642728B (en) | A kind of elastomeric material liquid is expanded into the device and method of shape composite bimetal pipe | |
| JP4747131B2 (en) | Sheet gasket | |
| CN110864172A (en) | Novel compression-resistant flange for pipeline connection | |
| CN101737590A (en) | Composite heat-insulating steel Half ring and preparation method thereof | |
| CN217784198U (en) | ePTFE oil-proof sealing non-leakage gasket part for airplane | |
| CN207042438U (en) | A kind of composite construction high-temperature high-pressure reaction kettle | |
| CN202418563U (en) | Double side seal type teflon gasket | |
| CN104827675A (en) | Elastic seamless closure body | |
| CN1021077C (en) | Fluon-rubber compound compensator and made method | |
| CN111706709A (en) | Low-leakage sealing washer for high-pressure valve | |
| CN110657288A (en) | Metal-plastic composite pipe system and manufacturing method thereof | |
| CN103450825A (en) | Sealant rod for under-pressure leak stoppage | |
| CN203254708U (en) | High-strength composite hose | |
| CN220339944U (en) | Radial fatigue testing arrangement of bellows | |
| CN209738449U (en) | PTFE composite sealing base plate | |
| CN209738448U (en) | PTFE composite sealing gasket | |
| Latte et al. | Industrial gaskets | |
| CN117901462A (en) | Manufacturing method of all-composite pressure equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 213000 No.8 Qiancao Road, Lijia Town, Wujin District, Changzhou City, Jiangsu Province Applicant after: PANASIAN MICROVENT TECH (JIANGSU) Corp. Address before: 213000, No. 28-8, Sakamoto Road, Sakamoto village, Lijia Town, Wujin District, Jiangsu, Changzhou Applicant before: PANASIAN MICROVENT TECH (JIANGSU) Corp. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |