CN1015427B - Polytetrafluoroethylene mulch and preparation process therefor - Google Patents
Polytetrafluoroethylene mulch and preparation process thereforInfo
- Publication number
- CN1015427B CN1015427B CN 90101133 CN90101133A CN1015427B CN 1015427 B CN1015427 B CN 1015427B CN 90101133 CN90101133 CN 90101133 CN 90101133 A CN90101133 A CN 90101133A CN 1015427 B CN1015427 B CN 1015427B
- Authority
- CN
- China
- Prior art keywords
- ptfe
- polytetrafluoroethylene
- cladding material
- alkali
- laminated
- 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.)
- Expired
Links
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 59
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 59
- -1 Polytetrafluoroethylene Polymers 0.000 title claims abstract description 12
- 239000002362 mulch Substances 0.000 title claims description 3
- 238000002360 preparation method Methods 0.000 title abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000003365 glass fiber Substances 0.000 claims abstract description 12
- 239000002648 laminated material Substances 0.000 claims abstract description 7
- 238000005253 cladding Methods 0.000 claims description 34
- 239000004744 fabric Substances 0.000 claims description 22
- 238000007514 turning Methods 0.000 claims description 14
- 239000006185 dispersion Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000011521 glass Substances 0.000 claims description 6
- 238000003475 lamination Methods 0.000 claims description 5
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000003754 machining Methods 0.000 abstract description 4
- 239000004033 plastic Substances 0.000 abstract description 3
- 238000005245 sintering Methods 0.000 abstract description 3
- 239000003513 alkali Substances 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000004026 adhesive bonding Methods 0.000 abstract 2
- 238000009739 binding Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 22
- 239000011491 glass wool Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 235000002639 sodium chloride Nutrition 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The present invention relates to laminated covering material obtained by gluing plastic material on glass fibers and a preparation process thereof. The polytetrafluoroethylene covering material (PTFE for short) of the present invention is obtained by gluing, tightly binding, sintering, heating and silidifying PTFE laminated material rolled and twined on a mould and non-alkali glass fiber inner lining material; the minimum thickness of a PTFE layer is 0.1mm. The preparation technique of the present invention avoids the specific requirement of the prior art for the inner lining material, and reduces a PTFE dosage; the covering material with a space shape can be molded in one step. The covering material produced by the technique has the advantages of reliable permeation resistance performance, reliable bonding strength and good machining performance.
Description
The present invention relates to a kind ofly by the bonding lamination cladding material and the manufacture method thereof that obtain of plastic material on glass fibre, content of the present invention is to be the cladding material and the manufacture method thereof of plastic material with the polytetrafluoroethylene (PTFE).
Polytetrafluoroethylene (PTFE) (hereinafter to be referred as PTFE) has extremely strong anticorrosive, high temperature resistant, is difficult for characteristics such as aging, but it has and does not possess adhering defective as cladding material separately.People are bonded in bonding strength on the base material in order to increase it, adopt the way that after laying one deck inner liner on the PTFE film, adheres to base material again and get on [referring to the clear 39(1964 of Japan Patent)-25288, the clear 57(1982 of Japan Patent)-5180].Because this technology does not solve the problem that gas is overflowed, bonding effect is still undesirable.Japanese [the clear 60(1985 of patent)-115440] angle from the inner liner material has for this reason further proposed the improvement way, adopt the special material of the glass fibre plain weave Coarse Mesh Gauze of not twisting to make inner liner, radially the steam that is impregnated into is discharged by it with the continuous hole of broadwise, to increase its bonding strength, but if will practical application in having the device of spatial form, effect but be still unfavorable.In addition, this technology is owing to still make the PTFE layer with the PTFE monolithic film membrane, and defectives such as the mechanical damage that film itself exists, micropore can enter in the finished product of cladding material thereupon, and its thickness must be retained in more than 0.2 millimeter, could guarantee the anti-ability of soaking into.This technology is owing to adopt heated lamination between metal forming or the forming technology of hot pressing roll, also can not disposable integral shapes the cover layer of the device with spatial form.
The present invention will provide a kind of even more ideal PTFE cladding material and manufacture method thereof, the thickness of the PTFE layer of this cladding material can be broken through 0.2 millimeter forbidden zone, though thickness as thin as a wafer, but have and reliably anti-ly soak into Neng Li And required bonding strength of practical application and machining property thereof are arranged, this manufacture method can solve the not smooth problem of exhaust the technology effectively from new angle, avoid the use ， And of special inner lining material can be disposable be cover layer with the cladding material monolithic molding with device of spatial form.
PTFE cladding material of the present invention is a kind of cladding material that is formed by glass fabric and the welding of PTFE film, the glass fabric that is adopted is the alkali-free glass fibre fabric of twisting, used PTFE film is for folding the laminated material that forms with PTFE turning belt, bond medium between the alkali-free glass fibre fabric of turning band laminated material and twisting is the PTFE dispersion liquid, and the minimum thickness of PTFE layer is 0.1 millimeter.Manufacture method of the present invention is successively PTFE turning tape error position to be layered on the mould, with the brushing of PTFE dispersion liquid on turning band lamination, the alkali-free glass fibre fabric of twisting is applied, closely tie up with auxiliary braid, the moisture content in the oven dry PTFE dispersion liquid coating, heat-agglomerating is shaped, cooling, shed auxiliary braid, take out mould, get said PTFE cladding material.
The PTFE layer of cladding material of the present invention is the laminated material of PTFE turning band, micropore and mechanical damage that turning band itself exists are blind hole because of dislocation is overrided to form, and have guaranteed that the thickness of PTFE layer still can form the cladding material with resistance to penetration energy with inner liner under 0.1 millimeter situation; Cladding material is made bond medium with the PTFE dispersion liquid, both can guarantee good wellability, the harmful effect that can eliminate the heterogeneous PTFE of entering layer again and produce owing to be anchored effect, with PTFE be that the dispersion liquid of homogeneous material can bond together PTFE layer and glass fabric securely; The present invention makes inner liner with the alkali-free glass fibre fabric of common twisting, has got rid of the shortcoming on the machining property that alkali glass fiber dimensional fabric poor toughness is arranged.
The method that manufacture method of the present invention laminates with the dislocation of turning band multilayer makes interlayer form spacious exhaust apertures, gas in the PTFE turning band body microgap and with the gap of shaping dies in the gas that exists can in the hot pressed sintering process, overflow smoothly, solved because the low technical problem of bonding strength that exhaust does not freely cause.The present invention utilizes mould and is banded in surperficial auxiliary braid and makes the shaping pressure source, because the interior pressure that thermal expansion produces makes steam and residual air overflow along the low pressure direction, the countless pores on the auxiliary braid also help the effusion of gas in the heat-agglomerating process in the heat-agglomerating technology.The integrated artistic of making cladding material makes cladding material be configured as the cover layer with spatial form by disposable integral.
As mentioned above, PTFE cladding material of the present invention has good adhesive strength and machining property, be still to have under 0.1 millimeter the condition anti-ly reliably to soak into ability at the thickness of PTFE layer, thereby greatly reduce the cost of cladding material, enlarged the range of application of cladding material.Manufacture method of the present invention has solved the not smooth problem of exhaust the cladding material manufacturing process from the angle of PTFE layer and auxiliary braid, and does not need with the inner liner ， And of special material and can make the cladding material with spatial form by once-forming.
The present invention specifies with following embodiment.
1, make straight tube shape PTFE cladding material:
The external diameter of making any surface finish is 79.6 millimeters, long 1 meter stainless steel straight tube mould.
Thickness be 0.2 millimeter, the wide 20 millimeters homemade trade mark be the alkali-free glass wool cloth of ET-100 with drying under 50 ℃ of warm water washing back room temperatures, stand-by.
With wide 12 millimeters, the thick 0.04 millimeter turning tape error position volume that is formed by PTFE bar car system is scratched on above-mentioned mould, volume is scratched after three layers equably with the concentrated dispersion liquid brushing of the PTFE of homemade dipping special use on lamination, the dispersion liquid consumption is controlled at about 0.3 kilogram/square metre, with above-mentioned stand-by alkali-free glass wool cloth on the coating of dispersion liquid equably volume scratch one deck, make auxiliary braid with 160 purpose brass wire guipures afterwards, tie up the alkali-free glass wool layer of cloth closely, equably.This is placed in the sintering furnace, toasted 10 minutes down at 80 ℃, in 40 minutes, slowly be warming up to 390 ℃ equably again, constant temperature 10 minutes, come out of the stove, put into cold water fast and cool off, shed outer brass wire mesh, take out mould, external diameter to be slightly smaller than 80 millimeters PTFE layer thickness be 0.12 millimeter straight tube shape cladding material.
2, the performance test of straight tube shape PTFE cladding material.
It is 80 millimeters that the above-mentioned straight tube shape cladding material that makes is sleeved on the internal diameter that inwall evenly scribbles epoxy resin, bonding through 4 hours the cure under pressure of heating in long 1 meter the seamless steel pipe, must be bonded with the seamless steel straight tube of PTFE cladding material.
This straight tube two ends blind plate capping vacuumizes with the vavuum pump that is connected on the blind plate, keeps the vacuum of negative pressure at 760 millimetress of mercury, and the blind plate inspection is opened in emptying after 4 hours, does not find distortion, the peeling phenomenon of cladding material.Then in this straight tube, fill with saturated aqueous common salt, a plain conductor is inserted in the saline solution by blind plate, the sealing back adds 4 atmospheric pressure And and kept this pressure 24 hours, insert the plain conductor of saline solution after the logical atmosphere with megger one termination of 10 megaohms, the other end and outer layer pipe join, and measure its resistance, reading is infinitely great, and any phenomenon of soaking into does not promptly take place.
3, the adhesion test of straight tube shape PTFE cladding material aspect.
Make the method for straight tube shape cladding material as embodiment 1, make auxiliary braid with the alkali-free glass wool cloth of homemade trade mark ET-100, making the PTFE layer thickness respectively is 0.2,0.35,0.4 the straight tube shape cladding material of millimeter, the block cladding material of 250 * 40 square millimeters of clips therefrom, on its alkali-free glass wool layer of cloth, apply epoxy resin and make binding agent, behind the alkali-free glass wool cloth of folded last two layers of ET-100, be heated to 80 ℃ of thermosettings, in order to guarantee the resistance to tension of alkali-free glass wool layer of cloth, carry out the test of the bonding strength of PTFE layer and alkali-free glass wool cloth interlayer then, test result is as follows:
Peeling rate sample number PTFE layer thickness measured result (Newton/millimeter)
1 0.4 millimeter 3.80
50 millimeters/minute 2 0.2 millimeter 3.70
3 0.35 millimeter 3.88
Claims (4)
1, a kind ofly makes the cladding material of inner liner welding on polytetrafluoroethylene film with glass fabric, it is characterized in that the alkali-free glass fibre fabric of said glass fabric for twisting, the laminated material of said polytetrafluoroethylene film for being laminated by polytetrafluoroethylene (PTFE) turning tape error position, bond medium between turning band laminated material and the inner liner is a polytetrafluoroethyldispersion dispersion, and the thickness minimum of polytetrafluoroethylene (PTFE) laminated material is 0.1 millimeter.
2, by the described polytetrafluoroethylmulch mulch of claim 1, the thickness that it is characterized in that said polytetrafluoroethylene (PTFE) turning band is 0.02～0.09 millimeter, and width is 5～40 millimeters.
3, a kind of manufacture method of making the cladding material of inner liner welding on polytetrafluoroethylene film with glass fabric, it is characterized in that: successively polytetrafluoroethylene (PTFE) turning tape error position is layered on the mould, with the polytetrafluoroethyldispersion dispersion brushing on turning band lamination, the alkali-free glass fibre fabric of twisting is applied, closely tie up with auxiliary braid, moisture content in the oven dry polytetrafluoroethyldispersion dispersion coating, intensification heat-agglomerating is shaped, cooling, shed auxiliary braid, take out mould, get cladding material of the present invention.
4,, it is characterized in that said auxiliary braid is the alkali-free glass fibre fabric of twisting or is 160 purpose brass wire meshes by the manufacture method of the described cladding material of claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90101133 CN1015427B (en) | 1990-03-01 | 1990-03-01 | Polytetrafluoroethylene mulch and preparation process therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90101133 CN1015427B (en) | 1990-03-01 | 1990-03-01 | Polytetrafluoroethylene mulch and preparation process therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1050700A CN1050700A (en) | 1991-04-17 |
| CN1015427B true CN1015427B (en) | 1992-02-12 |
Family
ID=4876951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90101133 Expired CN1015427B (en) | 1990-03-01 | 1990-03-01 | Polytetrafluoroethylene mulch and preparation process therefor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1015427B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100586538C (en) * | 2006-06-19 | 2010-02-03 | 江苏正大森源集团有限公司 | Polytetrafluoroethylene double-film composite filtering materials |
| DE102006055796A1 (en) * | 2006-11-27 | 2008-05-29 | Robert Bosch Gmbh | Pressure control valve |
| CN101491945B (en) * | 2009-02-19 | 2010-12-29 | 广州市东泓橡塑制品有限公司 | Preparation method of teflon oriented film of ultra-thin breadth |
| CN102166852A (en) * | 2010-12-31 | 2011-08-31 | 广东生益科技股份有限公司 | Preparation method of PTFE (polytetrafluoroethylene) copper-clad plate with high elastic modulus |
-
1990
- 1990-03-01 CN CN 90101133 patent/CN1015427B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1050700A (en) | 1991-04-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |