CN203836188U - Polytetrafluoroethylene sandwich type gasket - Google Patents
Polytetrafluoroethylene sandwich type gasket Download PDFInfo
- Publication number
- CN203836188U CN203836188U CN201420240415.1U CN201420240415U CN203836188U CN 203836188 U CN203836188 U CN 203836188U CN 201420240415 U CN201420240415 U CN 201420240415U CN 203836188 U CN203836188 U CN 203836188U
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- China
- Prior art keywords
- pad
- graphite
- polytetrafluoroethylene
- sandwich type
- reinforced
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Abstract
The utility model relates to a polytetrafluoroethylene sandwich type gasket. The polytetrafluoroethylene sandwich type gasket comprises an annular core and a polytetrafluoroethylene slice layer wrapped around the annular core. The polytetrafluoroethylene sandwich type gasket is characterized in that the annular core is composed of a graphite-reinforced pad or a non-asbestos pad and wool felt layers attached to the upper surface and the lower surface of the graphite-reinforced pad or the non-asbestos pad. Compared with the prior art, the polytetrafluoroethylene sandwich type gasket has the advantages that the annular core is composed of the graphite-reinforced pad or the non-asbestos pad and the wool felt layers attached to the upper surface and the lower surface of the graphite-reinforced pad, the graphite-reinforced pad and the non-asbestos pad are both high in strength, good in anti-corrosion property, resistant to high temperature/low temperature and high in compression rebound rate, the upper surface and the lower surface of the graphite-reinforced pad are respectively additionally provided with one wool felt layer in order to overcome the defect that graphite on the surfaces are prone to falling, and the wool felt layers not only can protect the surface structures of the graphite-reinforced pad but also can effectively improve the cold flow property of polytetrafluoroethylene which is prone to embrittlement when outside temperature difference changes greatly.
Description
Technical field
The utility model relates to a kind of teflon clip pack pad.
Background technique
Teflon clip pack pad is generally by asbestos rubber pad, without asbestos packing, rubber or graphite, to strengthen the annular soft pad sheets such as pad as sandwich, a kind of ring packing pad that then wrapped in teflon thin slice combines.According to the difference of cross section, teflon clip pack pad on the market generally comprises two kinds of V-type and U-shapeds, and V-type teflon clip pack pad is formed by the turning of tetrafluoro plate machinery, U-shaped teflon clip pack pad by Teflon tap bound edge after caking form.
Teflon clip pack pad has excellent corrosion resistance and good compression rebound rate, is often applied to strong acid, highly basic, strong oxidizer, chlorine and does not allow the sealing of pollution medium.Also can be used for the alkali metal except molten state, high temperature fluorine element, the sealing of the All Media outside part aromatic compound simultaneously.
In recent years, along with the reinforcement gradually of environmental consciousness, the whole world basic forbidding asbestos and Related product, because asbestos are a kind of universally acknowledged carcinogens, be therefore no longer applicable to sandwich as teflon clip pack pad.
Model utility content
Technical problem to be solved in the utility model is that a kind of teflon clip pack pad of environmental protection is provided for above-mentioned prior art, and this teflon clip pack gasket strength performance is higher, also improves the cold flow properties of teflon.
The utility model solves the problems of the technologies described above adopted technological scheme: a kind of teflon clip pack pad, comprise that annular is sandwich, be wrapped in the sandwich outer teflon lamella of annular, it is characterized in that: described annular is sandwich strengthens pad or without asbestos packing and be attached to graphite and strengthen pad or form without the wool carpet veneer of asbestos packing upper and lower surface by graphite.
As improvement, the thickness of described wool carpet veneer is 0.3mm～1mm, preferred 0.5mm, and such thickness, can better protect graphite to strengthen the surperficial graphite of pad and easily come off, and can also very effectively improve the cold flow properties of teflon simultaneously.
Improve, graphite strengthens pad or is 2mm～4mm without the thickness of asbestos packing, preferably 3mm again.
Improve, the thickness of described teflon lamella is 0.4mm～0.6mm again, preferably 0.5mm.
Compared with prior art, the utility model has the advantage of: annular is sandwich strengthens pad or without asbestos packing and be attached to the wool carpet veneer that graphite strengthens pad upper and lower surface and form by graphite, graphite strengthens pad and all higher without the intensity of asbestos packing, there is good anticorrosive property, high temperature resistant/low temperature, there is good compression rebound rate and high-intensity performance, but its shortcoming is surperficial graphite easily to come off, therefore at graphite, strengthen pad upper and lower surface and respectively add one deck wool carpet veneer, wool carpet veneer not only can protect graphite to strengthen pad surface structure, can effectively improve the cold flow properties of tetrafluoro simultaneously, because teflon is easily subject to the great variety of the extraneous temperature difference and embrittlement.
Accompanying drawing explanation
Fig. 1 is the planimetric map of teflon clip pack pad in the utility model embodiment one.
Fig. 2 is the cross sectional representation at A-A place in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
Embodiment one
The teflon clip pack pad that the present embodiment provides, comprise that annular is sandwich, and be wrapped in the sandwich outer teflon lamella 1 of annular, shown in Figure 1, wherein said annular is sandwich to be strengthened pad 2 and is attached to the wool carpet veneer 3 that graphite strengthens pad upper and lower surface by graphite and form, shown in Figure 2, in the present embodiment, the cross section of pad is U-shaped, and the scheme of the present embodiment also goes for the V-shaped pad of cross section.Wherein the thickness of wool carpet veneer 3 is 0.5mm; The thickness that graphite strengthens pad 2 is 3mm; The thickness of teflon lamella 1 is 0.5mm.
Embodiment two
Different from embodiment one, graphite strengthens pad 2 by substituting without asbestos packing.
Claims (4)
1. a teflon clip pack pad, comprise that annular is sandwich, be wrapped in the sandwich outer teflon lamella of annular, it is characterized in that: described annular is sandwich strengthens pad or without asbestos packing and be attached to graphite and strengthen pad or form without the wool carpet veneer of asbestos packing upper and lower surface by graphite.
2. teflon clip pack pad according to claim 1, is characterized in that: the thickness of described wool carpet veneer is 0.3mm～1mm.
3. teflon clip pack pad according to claim 1, is characterized in that: graphite strengthens pad or is 2mm～4mm without the thickness of asbestos packing.
4. teflon clip pack pad according to claim 1, is characterized in that: the thickness of described teflon lamella is 0.4mm～0.6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420240415.1U CN203836188U (en) | 2014-05-12 | 2014-05-12 | Polytetrafluoroethylene sandwich type gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420240415.1U CN203836188U (en) | 2014-05-12 | 2014-05-12 | Polytetrafluoroethylene sandwich type gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203836188U true CN203836188U (en) | 2014-09-17 |
Family
ID=51514030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420240415.1U Expired - Fee Related CN203836188U (en) | 2014-05-12 | 2014-05-12 | Polytetrafluoroethylene sandwich type gasket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203836188U (en) |
-
2014
- 2014-05-12 CN CN201420240415.1U patent/CN203836188U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20190512 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |