CN217784198U - ePTFE oil-proof sealing non-leakage gasket part for airplane - Google Patents
ePTFE oil-proof sealing non-leakage gasket part for airplane Download PDFInfo
- Publication number
- CN217784198U CN217784198U CN202221546636.2U CN202221546636U CN217784198U CN 217784198 U CN217784198 U CN 217784198U CN 202221546636 U CN202221546636 U CN 202221546636U CN 217784198 U CN217784198 U CN 217784198U
- Authority
- CN
- China
- Prior art keywords
- expanded polytetrafluoroethylene
- hydrophobic
- eptfe
- aircraft
- oleophobic
- 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.)
- Active
Links
Images
Landscapes
- Laminated Bodies (AREA)
Abstract
The utility model discloses an ePTFE oil-proof sealing non-leakage gasket part for an airplane, which comprises a hydrophobic and oleophobic expanded polytetrafluoroethylene film layer, wherein an adhesion layer is compounded on the periphery of one side surface of the hydrophobic and oleophobic expanded polytetrafluoroethylene film layer, and the hydrophobic and oleophobic expanded polytetrafluoroethylene film layer and the adhesion layer are covered by an anti-adhesion isolation paper layer; the preparation method comprises the manufacturing of an expanded polytetrafluoroethylene membrane, the manufacturing of a hydrophobic and oleophobic expanded polytetrafluoroethylene membrane and the manufacturing of an ePTFE oil-resistant sealing and non-leakage gasket part for an airplane; the shim member is for use in an aircraft. In this way, the utility model is used for sealed, wearing and tearing, corruption and gap are filled, can satisfy multiple aviation material specification demand, have reduced user's cost, have saved the expense.
Description
Technical Field
The utility model relates to a combined material technical field especially relates to an aircraft is with ePTFE resistant oily sealed non-leakage gasket part.
Background
The material requirements for aircraft seals are very demanding and the interface between the leading edge of the wing and the fairing is subject to various mechanical forces and harsh environmental challenges, resulting in structural damage due to wear and corrosion.
In addition, fuel or other access covers are also subjected to similar mechanical stresses, and after multiple disassembly and assembly, the covers still need to be sealed and surface protected from the harsh environment and from the erosion of foreign objects. Therefore, the selection of a suitable interface material is critical to aircraft production and operation.
There are often large differences between the plurality of large continuous cowls and flaps, particularly where manufacturing tolerances result in gaps between the cowls and the mounting structure, which affect the life cycle
Common sealing materials comprise rubber asbestos pads, rubber pads, wound gaskets, aramid gaskets, asbestos pads, flexible graphite, polytetrafluoroethylene and the like, and are mainly used for sealing engineering pipelines at middle and low ends. As a sealing material, poor creep resistance limits its application in aerospace materials.
At present, the highly laminated GORE SKYFLEX material of the GORE Goll company in the USA can provide excellent sealing performance in gaps and irregular surfaces. But the material has most market share in China and other areas, the selling price reaches 8000 yuan/square meter, the cost is extremely high, and the development of the aircraft manufacturing industry in China is limited.
SUMMERY OF THE UTILITY MODEL
The utility model mainly solves the technical problem of providing an oil-proof sealing non-leakage gasket part of ePTFE for an airplane, which can meet the specification requirements of various aviation materials, and the materials can solve the difficult problems of OEM manufacturers and operators in the joint surfaces, such as sealing, abrasion, corrosion and gap filling; the material and the die-cut piece are light in weight, soft in material, free of solidification, easy to install and capable of effectively saving time, are usually used as a substitute for field forming sealing materials, can simplify the assembly process of an airplane, still maintain the protection performance after being disassembled and assembled for many times, and reduce the life cycle cost.
In order to solve the technical problem, the utility model discloses a technical scheme be: there is provided an ePTFE oil resistant seal leak-tight gasket component for aircraft comprising:
a hydrophobic and oleophobic expanded polytetrafluoroethylene film layer;
the adhesion layer is compounded on the periphery of one side surface of the hydrophobic and oleophobic expanded polytetrafluoroethylene film layer;
the anti-sticking isolation paper layer covers the adhesion layer and the hydrophobic and oleophobic expanded polytetrafluoroethylene film layer;
the part of the hydrophobic and oleophobic expanded polytetrafluoroethylene film layer combined with the adhesion layer is the adhesion area of the gasket part, and the central area of the hydrophobic and oleophobic expanded polytetrafluoroethylene film layer is the action area of the gasket part.
In a preferred embodiment of the present invention, the hydrophobic and oleophobic expanded polytetrafluoroethylene membrane comprises an expanded polytetrafluoroethylene membrane coated with a hydrophobic and oleophobic finishing agent, and is formed by stacking multiple layers of hydrophobic and oleophobic expanded polytetrafluoroethylene membranes, and a staggered nano-micro stereo pore group is formed.
In a preferred embodiment of the present invention, the pore diameter of the nano-micro three-dimensional pore group is in a range of 0.01 to 15 μm.
In a preferred embodiment of the present invention, the adhesion layer is an oil-resistant and aging-resistant pressure-sensitive adhesive ring.
In a preferred embodiment of the present invention, the release barrier paper layer is a PET release film or paper.
In a preferred embodiment of the present invention, the shape of the spacer member is a flat cylindrical shape, a rectangular parallelepiped shape or a shape corresponding to a profile shape.
In a preferred embodiment of the present invention, the adhesion region is further provided with mounting holes uniformly distributed, and the mounting holes are assembled with the fuel tank hole of the aircraft through a fastener to realize the sealing of the aircraft fuel tank.
In a preferred embodiment of the invention, the pad member is a flexible member that can be bent at will.
The utility model has the advantages that: the product has various shapes and different sizes, has wide engineering performance and can meet the requirements of various aviation material specifications;
in addition, as the material can be processed into various shapes, the trouble of reprocessing by users is saved, so that the material can be more widely applied to advanced equipment industries and other industries with high efficiency, and the user cost is further reduced;
the problems of sealing, abrasion, corrosion and gap filling of joint surfaces of an OEM manufacturer and an operator can be solved;
the aircraft sealing material has the advantages of light weight, soft material, no need of curing, easiness in installation and capability of effectively saving time, is usually used as a substitute for a field forming sealing material, and can simplify the aircraft assembly process;
after being disassembled and assembled for many times, the protective performance is still kept, the service life of the product exceeds that of a common product by 10 to 15 product life cycles, the life cycle cost is reduced, and the cost is saved.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic view of a preferred embodiment of an aircraft ePTFE oil resistant seal leak proof gasket member of the present invention;
FIG. 2 is a schematic view, partially in section, of another preferred embodiment of an aircraft ePTFE oil resistant seal leak-tight gasket member of the present invention;
the parts in the drawings are numbered as follows: 100. 200 parts of a hydrophobic and oleophobic expanded polytetrafluoroethylene film layer, 300 parts of an adhesion layer, 300 parts of an anti-adhesion isolation paper layer, 400 parts of an adhesion area, 500 parts of an action area, 600 parts of a mounting hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "front" and "rear" and the like are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to be referred must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, a first feature may comprise a first and a second feature in direct contact, or the first and second features may be in contact by means of another feature not in direct contact but in between. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Referring to fig. 1 to fig. 2, an embodiment of the present invention includes:
an ePTFE oil resistant seal leak-tight gasket component for aircraft comprising: the periphery of one side of the hydrophobic and oleophobic expanded polytetrafluoroethylene film layer 100 is compounded with an adhesion layer 200, and the hydrophobic and oleophobic expanded polytetrafluoroethylene film layer 100 and the adhesion layer 200 are covered by an anti-sticking isolation paper layer 300.
The hydrophobic and oleophobic expanded polytetrafluoroethylene membrane is modified by the nano-micropore modification of the expanded polytetrafluoroethylene membrane: coating a hydrophobic and oleophobic finishing agent on the expanded polytetrafluoroethylene membrane for waterproof treatment and oleophobic treatment, drying at low temperature, curing, modifying and opening pores to form a finer and relatively uniform staggered nano-micro stereo pore group, wherein the pore diameter range of the nano-micro stereo pore group is 0.01-15 mu m. The expanded polytetrafluoroethylene microporous film is subjected to nano-micropore modification technology treatment, namely surface oil-proof and water-proof treatment, to form a novel polymer material with a special function, and the modified novel expanded polytetrafluoroethylene microporous film material with a unique microporous structure is a hydrophobic and oleophobic expanded polytetrafluoroethylene film.
The adhesion layer 200 is an oil-resistant and aging-resistant pressure-sensitive rubber ring, and the structure of the pressure-sensitive rubber ring improves the use convenience and the operation efficiency; the anti-sticking isolation paper layer 300 is a PET anti-sticking film or paper, and the pressure-sensitive adhesive ring of the gasket part is protected by the PET anti-sticking film or paper before the use of a client, so that the mass production is facilitated, and the storage, the transportation and the use of the client are facilitated.
The utility model discloses carry out modification treatment to the micropore of receiving on expanded polytetrafluoroethylene micropore film surface, make porousness, high low temperature resistant environment use, combine firmly, the good, ultraviolet resistance of chemical inertia, the uninflammable expanded polytetrafluoroethylene film of unique micro-structure such as bonding, then with the hydrophobic oleophobic expanded polytetrafluoroethylene membrane of modification further with the pressure sensitive adhesive laminating for make aircraft with the sealed not seepage gasket part of resistant oily seal ePTFE.
The gasket part of the utility model can have various shapes, is adaptive to the actual application occasion, and can be flat and thin cylinder, cuboid or special-shaped.
The color of the gasket part of the utility model can be various colors, such as black, white, red, green, etc.
The ePTFE oil-proof sealing non-leakage gasket part for the airplane is a flexible part and can be bent randomly even exceeding 360 degrees, and the gasket part has excellent performances of water resistance, dust resistance, oil resistance and environmental change resistance.
The utility model discloses in, the part that hydrophobic oleophobic expanded polytetrafluoroethylene rete 100 and adhesion layer 200 combine is the adhesion region 400 of gasket part, and hydrophobic oleophobic expanded polytetrafluoroethylene rete 100's central zone is the region of action 500 of gasket part.
Furthermore, the adhesion area 400 is further provided with mounting holes 600 which are uniformly distributed, and the mounting holes 600 are assembled with an oil tank hole of an airplane by using fasteners so as to realize a reliable sealing function of the airplane oil tank.
This expanded polytetrafluoroethylene membrane module macromolecular material is rich in elasticity and pliability, has the three-dimensional nanometer micropore network structure that microfiber connects and form, and the product has outstanding creep resistance and anti cold flow performance, and expanded polytetrafluoroethylene membrane roll-up laminated sheet has bigger tensile strength: thus, less deformation (thickness and width deformation) after compression than other gaskets, a greater rate of bolt compression force can be maintained in use, providing more reliable sealing performance, especially under thermal cycling and higher temperature conditions.
Expanded polytetrafluoroethylene (ePTFE) membrane seals can withstand temperatures in the range of-269 ℃ to 315 ℃ (452 ° F to 600 ° F), making them useful in a variety of applications.
The expanded polytetrafluoroethylene membrane sealing product has less deformation after width compression, can avoid negative influence caused by the fact that the gasket is extruded into the product, improves the sealing reliability, is resistant to environmental aging, prolongs the service life, and reduces the maintenance cost of re-locking and replacing the gasket.
Unlike hard or filled tetrafluoro, this expanded polytetrafluoroethylene (ePTFE) membrane seal article can conform to common flange irregularities, such gaskets can avoid reworking the flange surface, expand the application range, and achieve extremely reliable sealing effects, thus making it easier to achieve trouble-free operation.
The price of the expanded polytetrafluoroethylene (ePTFE) membrane sealing sheet is 60-70% of the imported price, so that the manufacturing cost of customers can be further reduced, and the customer products have higher competitiveness.
A preparation method of an ePTFE oil-resistant sealing non-leakage gasket part for an airplane comprises the following steps:
(1) Production of expanded polytetrafluoroethylene film:
mixing the PTFE dispersion resin and the liquid extrusion aid in proportion, prepressing into cylinder blank, rolling to make the cylinder blank into sheet, removing the extrusion aid, stretching, and heat setting to obtain the final product.
(2) Manufacturing of a hydrophobic and oleophobic expanded polytetrafluoroethylene membrane:
and (2) unwinding the expanded polytetrafluoroethylene microporous film, coating a hydrophobic and oleophobic finishing agent on the expanded polytetrafluoroethylene microporous film for waterproof treatment and oleophobic treatment, drying and curing at low temperature to modify the opening, and carrying out inspection test and rolling to obtain the hydrophobic and oleophobic expanded polytetrafluoroethylene film.
The expanded polytetrafluoroethylene film has smaller openings of nano-micro pores formed by fibers of the expanded polytetrafluoroethylene film after surface hydrophobic and oleophobic modification treatment, forms low surface energy, has better rain-proof, dust-proof and chemical liquid and oil leakage-proof sealing performances under a certain pressure difference working environment, can bear the corrosion of all substances within the range of pH value of 0-14 (except molten alkali metal, sodium naphthalene solution and elemental fluorine, especially at high temperature), and has wider working temperature range of environmental use (-100 ℃ to +260 ℃).
(3) Manufacture of oil-resistant, sealed, leak-free gasket parts of ePTFE for aircraft:
preparing for unreeling the hydrophobic and oleophobic expanded polytetrafluoroethylene membrane, continuously rolling and wrapping the hydrophobic and oleophobic expanded polytetrafluoroethylene membrane into a multi-layer film-wrapping cylinder, axially cutting the multi-layer film-wrapping cylinder, re-hot pressing and shaping to eliminate internal stress,
Then compounding one side of the expanded polytetrafluoroethylene film multi-layer material with low surface energy with the pressure sensitive adhesive tape, integrally forming, die cutting and processing, then removing the waste material of the pressure sensitive adhesive tape, and finally finishing inspection, qualified finished products, packaging and delivery.
The production process has extremely high consistency and accuracy, so that compared with other expanded polytetrafluoroethylene plate-shaped gaskets, the expanded polytetrafluoroethylene film sealing product has more uniform density distribution, and the sealing effect is more consistent and reliable.
Table 1: technical performance indexes of gasket parts are as follows:
an application relates to an ePTFE oil-proof sealing non-leakage gasket part for an airplane,
the hydrophobic and oleophobic expanded polytetrafluoroethylene film with low surface energy is wound and superposed to form an oleophobic multilayer sealing material which can be applied to different environments:
the position that can contact fuel oil and other aviation liquid oil can be used as the sealing gasket of aircraft fuel tank, aircraft pipeline, pipeline flange:
the sealing part can not be broken or collapsed under the huge pressure fluctuation of the pressure difference caused by the rising, landing or pitching acceleration of the airplane, has enough strength and sealing surface, has good bonding compliance, can not be broken or collapsed to cause leakage, and can resist the rapid change of ultraviolet/environment temperature and the aging of bromine oxygen, thereby ensuring the reliable sealing and the long-term sealing reliability of an airplane oil tank, an airplane pipeline, a pipeline flange and the like;
reliable sealing and surface protection of the interface of the leading edge of the wing and the fairing:
the gasket part has reliable sealing and surface protection, and can avoid structural damage caused by abrasion and corrosion of the joint surface of the wing leading edge and the fairing due to various mechanical forces and severe environment;
fuel flap or overhaul flap etc. need the position of many times dismouting:
the fuel oil port cover or other maintenance port covers can be subjected to mechanical pressure brought by severe environment, the port cover still needs to be sealed and surface protected after being disassembled and assembled for many times, and the port cover is prevented from being corroded by severe environment and foreign matters;
sealing and surface protection at gaps and irregular surfaces between a plurality of successive cowls and flaps:
there is often a large variation in the number of successive cowlings and flaps, particularly manufacturing tolerances that result in gaps between the cowlings and the mounting structure, and a high degree of conformity of the product to gaps and irregular surfaces provides excellent sealing performance. Unlike other wet seal materials, the product material remains in place when subjected to pressure, is not squeezed out, provides reliable protection for the joint surface gap, and seals the place to effectively prevent foreign matter, thus protecting the aircraft structure and surface anticorrosive coatings from abrasion caused by deformation, vibration and fine foreign matter.
The gasket part has various shapes and different sizes, has wide engineering performance, meets the specification requirements of various aviation materials, and can solve the problems of sealing, abrasion, corrosion and gap filling of OEM manufacturers and operators on joint surfaces; the material and the die-cutting piece are light in weight, soft in material, free of solidification, easy to install and capable of effectively saving time, are usually used as a substitute for field forming sealing materials, can simplify the assembly process of an airplane, still maintain the protection performance after being disassembled and assembled for many times, and reduce the life cycle cost.
The utility model discloses the beneficial effect of the impervious gasket part of oil seal of ePTFE for the aircraft is:
the product has various shapes and different sizes, has wide engineering performance and can meet the requirements of various aviation material specifications;
in addition, as the material can be processed into various shapes, the trouble of reprocessing by users is saved, so that the material can be more widely applied to advanced equipment industries and other industries with high efficiency, and the user cost is further reduced;
the problems of sealing, abrasion, corrosion and gap filling of joint surfaces of an OEM manufacturer and an operator can be solved;
the aircraft sealing material has the advantages of light weight, soft material, no need of curing, easiness in installation and capability of effectively saving time, is usually used as a substitute for a field forming sealing material, and can simplify the aircraft assembly process;
after being disassembled and assembled for many times, the protective performance is still kept, the service life of the product exceeds that of a common product by 10 to 15, the life cycle cost is reduced, the cost is saved, the aircraft manufacturing industry in China has price advantage, the sealing performance is safe and reliable, the stable development is strong, and good economic benefit and social benefit are obtained for China.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.
Claims (8)
1. An ePTFE oil resistant seal leak-tight gasket component for aircraft comprising:
a hydrophobic and oleophobic expanded polytetrafluoroethylene film layer;
the adhesion layer is compounded on the periphery of one side surface of the hydrophobic and oleophobic expanded polytetrafluoroethylene film layer;
the anti-sticking isolation paper layer covers the adhesion layer and the hydrophobic and oleophobic expanded polytetrafluoroethylene film layer;
the part of the hydrophobic and oleophobic expanded polytetrafluoroethylene film layer combined with the adhesion layer is the adhesion area of the gasket part, and the central area of the hydrophobic and oleophobic expanded polytetrafluoroethylene film layer is the action area of the gasket part.
2. The ePTFE oil resistant sealed non-leaking gasket component for aircraft according to claim 1, wherein the hydrophobic and oleophobic expanded polytetrafluoroethylene membrane comprises an expanded polytetrafluoroethylene membrane coated with a hydrophobic and oleophobic finishing agent, and is formed by stacking a plurality of layers of hydrophobic and oleophobic expanded polytetrafluoroethylene membranes to form dislocated nano-micro stereo pore groups.
3. An ePTFE oil resistant sealed non-leaking gasket component for aircraft according to claim 2, characterized in that the pore size of said nano-micro stereo pore group is in the range of 0.01 to 15 μm.
4. An aircraft ePTFE oil resistant seal leak-proof gasket member in accordance with claim 1, wherein said adhesion layer is an oil resistant and aging resistant pressure sensitive adhesive ring.
5. An aircraft ePTFE oil resistant sealed leak tight gasket part as set forth in claim 1 wherein said release barrier paper layer is PET release film or paper.
6. An ePTFE oil resistant, sealed, leak impermeable gasket member for aircraft as set forth in claim 1 wherein the gasket member is in the form of a thin, flat cylinder, a rectangular parallelepiped or a profile.
7. The ePTFE oil-resistant sealing non-leakage gasket component for aircraft as claimed in claim 1, wherein the adhesion region is further provided with uniformly distributed mounting holes, and the mounting holes are assembled with an aircraft fuel tank hole through fasteners to realize aircraft fuel tank sealing.
8. An aircraft ePTFE oil resistant seal leak proof gasket member as set forth in claim 1 wherein the gasket member is a flexible member capable of being flexed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221546636.2U CN217784198U (en) | 2022-06-21 | 2022-06-21 | ePTFE oil-proof sealing non-leakage gasket part for airplane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221546636.2U CN217784198U (en) | 2022-06-21 | 2022-06-21 | ePTFE oil-proof sealing non-leakage gasket part for airplane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217784198U true CN217784198U (en) | 2022-11-11 |
Family
ID=83933837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221546636.2U Active CN217784198U (en) | 2022-06-21 | 2022-06-21 | ePTFE oil-proof sealing non-leakage gasket part for airplane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217784198U (en) |
-
2022
- 2022-06-21 CN CN202221546636.2U patent/CN217784198U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8579299B2 (en) | Gasket having adhesive element | |
| KR100222376B1 (en) | Packing rings method for production of the packing rings and seal device using the packing rings | |
| US5791659A (en) | Metal gasket | |
| JP2012211696A (en) | Low-stress molded gasket, and method of making the same | |
| CA1291183C (en) | Aluminum faced expanded graphite gasket and method of making same | |
| CN115126870A (en) | ePTFE oil-proof sealing non-leakage gasket part for airplane, preparation method and application thereof | |
| US20070187907A1 (en) | Flexible graphite/metal multilayer gaskets suited to high-temperature service conditions | |
| CN100547269C (en) | The seal washer of low stress | |
| EP0899488B1 (en) | High-pressure compression failure resistant and high sealing gasket | |
| EP0747615A1 (en) | Sealing made of expanded graphite, a method of producing it, and a gasket sheet | |
| JPH02218784A (en) | Highly compressible gasket material and its manufacture | |
| CN217784198U (en) | ePTFE oil-proof sealing non-leakage gasket part for airplane | |
| JP2566529B2 (en) | Sheet gasket | |
| KR100612136B1 (en) | High sealing gaskets | |
| US6139024A (en) | Cylinder head gasket | |
| WO1995030851A1 (en) | Gland packing | |
| US20160281852A1 (en) | Laminate Gasket with Woven Core | |
| KR101237539B1 (en) | Method of preparing wind wall for ship and the wind wall prepared by the method | |
| CN202532073U (en) | Elastic composite seal gasket | |
| CN107487058B (en) | Method and device for rapidly manufacturing expanded polytetrafluoroethylene sealing sheet and sealing product | |
| CN209604726U (en) | A kind of self-regulation gasket for flange seal | |
| CN209757935U (en) | Plastic packaging bag | |
| CN203348785U (en) | Wrapping pad | |
| CN213808825U (en) | Sealing ring of radiator | |
| CN101230143A (en) | Special type thermostable fluorine rubber compound |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |