CN104558976A - Fluororesin sealing material - Google Patents
Fluororesin sealing material Download PDFInfo
- Publication number
- CN104558976A CN104558976A CN201510047691.5A CN201510047691A CN104558976A CN 104558976 A CN104558976 A CN 104558976A CN 201510047691 A CN201510047691 A CN 201510047691A CN 104558976 A CN104558976 A CN 104558976A
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- CN
- China
- Prior art keywords
- fluoro
- resin
- hollow glass
- sealing material
- glass micropearl
- 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.)
- Pending
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- 239000003566 sealing material Substances 0.000 title claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 61
- 239000011521 glass Substances 0.000 claims abstract description 49
- 239000011347 resin Substances 0.000 claims description 101
- 229920005989 resin Polymers 0.000 claims description 101
- 238000012856 packing Methods 0.000 claims description 41
- 239000006057 Non-nutritive feed additive Substances 0.000 claims description 37
- 239000000203 mixture Substances 0.000 claims description 23
- 239000002904 solvent Substances 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 238000005245 sintering Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 8
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 229960001866 silicon dioxide Drugs 0.000 claims description 6
- 239000005995 Aluminium silicate Substances 0.000 claims description 5
- 235000012211 aluminium silicate Nutrition 0.000 claims description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 5
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 229910052863 mullite Inorganic materials 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 239000003209 petroleum derivative Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 13
- 230000006835 compression Effects 0.000 abstract description 7
- 238000007906 compression Methods 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000004005 microsphere Substances 0.000 abstract 5
- 239000002994 raw material Substances 0.000 abstract 1
- 239000011343 solid material Substances 0.000 abstract 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 5
- 241000219357 Cactaceae Species 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000011068 loading method Methods 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000011194 food seasoning agent Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- MOUPNEIJQCETIW-UHFFFAOYSA-N lead chromate Chemical compound [Pb+2].[O-][Cr]([O-])(=O)=O MOUPNEIJQCETIW-UHFFFAOYSA-N 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
Abstract
The invention discloses a fluororesin sealing material. The fluororesin sealing gasket comprises the following raw materials in percentage by weight: 29-95% of fluororesin, 1-30% of hollow glass microsphere and 0-70% of other filling materials. The processing assistant accounts for 10-25% of all the solid materials. The mass percents of the fluororesin, hollow glass microsphere, other filling materials and processing assistant are based on the sum of mass of the fluororesin, hollow glass microsphere and other filling materials. Since the sealing material contains the hollow glass microsphere, gaps can be formed in the plate structure in the plate manufacturing process; and in combination with the characteristic of high flowability of the hollow glass microsphere in the plate, the plate gasket can generate large compression set quantity under certain load conditions.
Description
Technical field
The present invention relates to a kind of fluoro-resin sealing material, be specifically related to the filling-modified fluoro-resin sealing material of a kind of hollow glass micropearl.
Background technology
Tetrafluoroethylene (PTFE) has the excellent advantage such as chemical resistance, temperature tolerance, weathering resistance, is widely used in sealing industry.But creep or cold flow easily occur tetrafluoroethylene, in order to improve PTFE cold flow, the most directly, economic method improves the creep property of PTFE.As, Chinese invention patent publication number CN 103435947A discloses wear-resistant, low creep PTFE stuffing materials and preparation method and application, its main ingredient comprises teflon resin, titanium chrome yellow, barium sulfate, silicon-dioxide, titanium dioxide and polymkeric substance, this PTFE stuffing materials is wear-resistant, low creep, long service life, the Fluororesin sheet being applicable to gasket material can be obtained.But the rate of compression of these fluoro-resin sealing plate materials is all less than normal, when these sheet material is used as pad, need just can obtain corresponding sealing effectiveness under the fastening loading of height.If the flange surface situation at sealing position load that is not ideal or that put on pad is not enough, easily cause the generation of leaking.For filling-modified PTFE stuffing materials, particularly packing material is when in whole cooperation composition, content proportion is larger, how to ensure that sealing material has larger rate of compression, play sealing function lower fastening loading is little, in prior art, do not provide related art scheme.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide the filling-modified fluoro-resin sealing material of a kind of hollow glass micropearl, to overcome the not enough defect easily causing revealing of load that the flange surface situation that is little, that seal position of fluoro-resin gasket seal rate of compression in prior art is not ideal or put on pad.
To achieve these goals or other objects, the present invention is achieved by the following technical solutions.
A kind of fluoro-resin sealing material, described fluoro-resin sealing material comprises following feed composition and mass percentage:
The mass percentage of described fluoro-resin, hollow glass micropearl, other packing material and processing aid is all for benchmark in the quality sum of fluoro-resin, hollow glass micropearl and other packing material.
Preferably, the mass percentage of described fluoro-resin is 47 ~ 95%.
Preferably, the mass percentage of described hollow glass micropearl is 5 ~ 30%.
Preferably, the mass percentage of other packing material described is 0 ~ 47%.
More preferably, the mass percentage of other packing material described is 1 ~ 47%.
More preferably, the mass percentage of other packing material described is 15 ~ 47%.
Preferably, the mass percentage of described processing aid is 12 ~ 25%.
More preferably, described fluoro-resin is selected from tetrafluoroethylene.
More preferably, described tetrafluoroethylene is dispersed polytetrafluoroethylresin, and its average particle size range is 350 ~ 750 μm.
Dispersed polytetrafluoroethylresin described above is the powdered resin of tetrafluoroethylene.
Preferably, the particle diameter of described hollow glass micropearl is 2 ~ 125 μm, and true density is 0.15 ~ 0.65g/cm
3.
Preferably, the median D50 of described hollow glass micropearl is 35 ~ 65 μm.
Preferably, other packing material described is selected from one or more in silicon-dioxide, barium sulfate, aluminum oxide, mullite and kaolin.
Preferably, described processing aid is selected from the petroleum hydrocarbon solvent of cut point below 125 DEG C.The lower value of cut point is not particularly limited, but cut point is too low, then in rolling process, the volatilization of processing aid is too fast, therefore requires to volatilize gradually, processing aid of going out can become difficulty.The petroleum naphtha series solvents such as ISOPAR C, the ISOPAR E of such as Exxon Mobil and the CACTUS SOLVENT R5N of Japan Energy Corp. company, it is conducive to the volatilization of solvent in the subsequent handling such as drying, sintering.
The invention also discloses a kind of fluoro-resin gasket seal, being prepared from by comprising fluoro-resin sealing material described above.
The invention also discloses a kind of preparation method of fluoro-resin gasket seal as described above, comprise the following steps:
1) take according to the mass percentage of each feed composition, and hollow glass micropearl, fluoro-resin and other packing material are uniformly mixed, in mixing process, add processing aid, form mixture;
2) utilize forcing machine by step 1) described in mixture extrusion moulding, formed preform;
3) by step 2) described preform makes sheet material by roll;
4) by step 3) described sheet drying, remove processing aid;
5) dried sheet material is carried out sintering i.e. obtained described fluoro-resin gasket seal.
Preferably, step 2) described in extrusion moulding temperature be 19 ~ 40 DEG C.
Preferably, step 3) described in roll rolling time, roll shop building is apart from being set as 0.5 ~ 20mm, and roller surface translational speed is 5 ~ 50mm/ second, and roller temperature is 40 ~ 80 DEG C.
More preferably, extrusion moulding at being at room temperature 25 DEG C; Namely below the rolling temperature of basic controlling in rolling process, make processing aid non-volatile, for the ease of shaping, ensure Forming Quality, the temperature of extrusion moulding should remain on more than 19 DEG C.
Preferably, step 4) in, dry placement under normal temperature is carried out, or the heating temperatures below the boiling point of teflon resin, removes processing aid whereby.
More specifically, step 4) in, dryly to place under normal temperature or carrying out lower than in 100 DEG C of air seasoning stoves.
Preferably, step 5) in, described sintering temperature is 345 ~ 375 DEG C, and sintering time is 0.5h ~ 4.0h.
Preferably, the thickness of the gasket seal of fluoro-resin disclosed in the present invention is 0.8 ~ 4.0mm.
Adopt the fluoro-resin sealing material lightweight prepared of aforesaid method and soft.
When adopting aforesaid method of the present invention to prepare fluoro-resin gasket seal, hollow glass micropearl is not pulverized in the course of processing.Specifically as shown in Figure 1, find out that glass microballon is not pulverized in the course of processing of sealing material by the Spherical pellets material in Fig. 1.
The invention also discloses the application of gasket seal as described above in mechanical seal field.
Adopt this sealing material due to containing hollow glass micropearl in the present invention, space can be formed in the plate construction that sheet material manufacturing processed is formed, and hollow glass micropearl also has high workability in sheet material, like this under certain loading condition, can there is larger compressed shape variable in the sheet material with this gap structure and high workability hollow glass micropearl structure.In the present invention, the compressed shape variable of material or rate of compression adopt JIS R 3453 standard to test.
Further, because the gasket seal in the present invention has larger compressed shape variable, under less plane of load press strip part or with under the less-than-ideal condition of sealing position surface appearance of pad contacts, pad and the space at sealing position can be made up better by deformation, more excellent sealing property can be shown; Especially, under low fastening surface press strip part, the superiority of its sealing property can more be shown.
Further, the sealing material entirety in the present invention has light and soft feature, when adopting mechanical workout to form the pad of specified shape, cutting or punching press being become and is more prone to, decreasing the infringement to blade or mould.
In a word, fluoro-resin sealing material in the present invention is adopted to have following advantage:
1) cost of the gasket seal made is low: owing to using low-density hollow glass bead, the proportion for filling-modified fluoro-resin sealing material is significantly diminished, thus significantly reduces costs.
2) gasket seal made has high compression rate and high leakproofness.
3) processing characteristics of fluoro-resin sealing material is excellent.
The sealing material of fluoro-resin disclosed in the present invention and gasket seal are owing to having various advantages and creative.
Accompanying drawing explanation
Fig. 1 is the sealing material electron microscope sectional view in the present invention.
Embodiment
Below by way of specific specific examples, embodiments of the present invention are described, those skilled in the art the content disclosed by this specification sheets can understand other advantages of the present invention and effect easily.The present invention can also be implemented or be applied by embodiments different in addition, and the every details in this specification sheets also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present invention.
The particle diameter of the described hollow glass micropearl used in following examples of the present invention is 2 ~ 125 μm, and true density is 0.15 ~ 0.65g/cm3; The median D50 of described hollow glass micropearl is 35 ~ 65 μm.
Comparative example 1
The gasket seal of fluoro-resin described in the present embodiment comprises following feed composition and mass percentage:
The mass percentage of described fluoro-resin, hollow glass micropearl, other packing material and processing aid is all count based on the total mass sum of fluoro-resin, hollow glass micropearl and other packing material.
The solvent of described processing aid to be model be ISOPAR C.
Described fluoro-resin is dispersed polytetrafluoroethylresin resin.
Embodiment 1
The sealing material of fluoro-resin described in the present embodiment comprises following feed composition and mass percentage:
The mass percentage of described fluoro-resin, hollow glass micropearl, other packing material and processing aid is all count based on the total mass sum of fluoro-resin, hollow glass micropearl and other packing material.
The solvent of described processing aid to be model be ISOPAR E.
Described fluoro-resin is dispersed polytetrafluoroethylresin resin.
Embodiment 2
The sealing material of fluoro-resin described in the present embodiment comprises following feed composition and mass percentage:
The mass percentage of described fluoro-resin, hollow glass micropearl, other packing material and processing aid is all count based on the total mass sum of fluoro-resin, hollow glass micropearl and other packing material.
The solvent of described processing aid to be model be ISOPAR C.
Described fluoro-resin is dispersed polytetrafluoroethylresin resin.
Embodiment 3
The sealing material of fluoro-resin described in the present embodiment comprises following feed composition and mass percentage:
The mass percentage of described fluoro-resin, hollow glass micropearl, other packing material and processing aid is all count based on the total mass sum of fluoro-resin, hollow glass micropearl and other packing material.
The model of described processing aid is the solvent of ISOPAR C.
Described fluoro-resin is dispersed polytetrafluoroethylresin resin.
Embodiment 4
The sealing material of fluoro-resin described in the present embodiment comprises following feed composition and mass percentage:
The mass percentage of described fluoro-resin, hollow glass micropearl, other packing material and processing aid is all count based on the total mass sum of fluoro-resin, hollow glass micropearl and other packing material.
Described processing aid is the CACTUS SOLVENT R5N of Japan Energy Corp. company.
Described fluoro-resin is dispersed polytetrafluoroethylresin resin.
Comparative example 2
The sealing material of fluoro-resin described in the present embodiment comprises following feed composition and mass percentage:
The mass percentage of described fluoro-resin, hollow glass micropearl, other packing material and processing aid is all count based on the total mass sum of fluoro-resin, hollow glass micropearl and other packing material.
Described processing aid is the CACTUS SOLVENT R5N of Japan Energy Corp. company.
Described fluoro-resin is dispersed polytetrafluoroethylresin resin.
Other packing material described in the present embodiment is kaolin.
Embodiment 5
The sealing material of fluoro-resin described in the present embodiment comprises following feed composition and weight percentage:
The mass percentage of described fluoro-resin, hollow glass micropearl, other packing material and processing aid is all count based on the total mass sum of fluoro-resin, hollow glass micropearl and other packing material.
Described processing aid is the CACTUS SOLVENT R5N of Japan Energy Corp. company.
Other packing material described in the present embodiment is kaolin.Described fluoro-resin is dispersed polytetrafluoroethylresin resin.
Embodiment 6
The sealing material of fluoro-resin described in the present embodiment comprises following feed composition and weight percentage:
The mass percentage of described fluoro-resin, hollow glass micropearl, other packing material and processing aid is all count based on the total mass sum of fluoro-resin, hollow glass micropearl and other packing material.
The model of described processing aid is the solvent of ISOPAR C.
Other packing material described in the present embodiment is kaolin.Described fluoro-resin is dispersed polytetrafluoroethylresin resin.
Comparative example 3
The sealing material of fluoro-resin described in the present embodiment comprises following feed composition and weight percentage:
The mass percentage of described fluoro-resin, hollow glass micropearl, other packing material and processing aid is all count based on the total mass sum of fluoro-resin, hollow glass micropearl and other packing material.
The model of described processing aid is the solvent of ISOPAR C.
Other packing material described in the present embodiment is silicon-dioxide and mullite, and wherein the weight ratio of silicon-dioxide and mullite is 12:33.Described fluoro-resin is dispersed polytetrafluoroethylresin resin.
Embodiment 7
The sealing material of fluoro-resin described in the present embodiment comprises following feed composition and weight percentage:
The mass percentage of described fluoro-resin, hollow glass micropearl, other packing material and processing aid is all count based on the total mass sum of fluoro-resin, hollow glass micropearl and other packing material.
The model of described processing aid is the solvent of ISOPAR C.
Other packing material described in the present embodiment is silicon-dioxide.Described fluoro-resin is dispersed polytetrafluoroethylresin resin.
Embodiment 8
The sealing material of fluoro-resin described in the present embodiment comprises following feed composition and mass percentage:
The mass percentage of described fluoro-resin, hollow glass micropearl, other packing material and processing aid is all count based on the total mass sum of fluoro-resin, hollow glass micropearl and other packing material.
Particularly, the processing aid in the present embodiment is the ISOPAR C of Exxon Mobil.
Other packing material described in the present embodiment is aluminum oxide.Described fluoro-resin is dispersed polytetrafluoroethylresin resin.
The preparation method of fluoro-resin gasket seal described in above-described embodiment and comparative example, comprises the following steps:
1) take according to the mass percentage of feed composition, hollow glass micropearl, fluoro-resin and other packing material are uniformly mixed, in mixing process, add processing aid, form mixture;
2) utilize forcing machine by step 1) described in mixture extrusion moulding, formed preform;
3) by step 2) described preform makes sheet material by roll;
4) by step 3) described sheet drying, remove processing aid;
5) dried sheet material is carried out sintering i.e. obtained described fluoro-resin gasket seal.
Particularly, step 2) described in extrusion moulding temperature be 25 DEG C.
Particularly, step 3) described in roll rolling time, roll shop building is apart from being set as 5mm, and roller surface translational speed is 25mm/ second, and roller temperature is 50 DEG C.
Particularly, step 4) in, dry temperature is placed and is carried out under normal temperature.
Particularly, step 5) in, described sintering temperature is 360 DEG C, and sintering time is 2.0h.
Particularly, the thickness of the fluoro-resin gasket seal prepared in the embodiment of the present invention is 2.0mm.
Each gasket seal in above-described embodiment is used for the sample that closure size is ф 89mm × ф 49mm, and specimen surface is not coated with sealing compound or covers film, flange surface roughness Ra=0.475 μm.Then sealing effectiveness is tested.
Wherein, test fluid flow is nitrogen, by Din3535 standard and method test vent flow.It is as shown in the table for test result.
Adopt JIS R 3453 method or standard testing rate of compression, it is as shown in the table for test result.
Detect above in watch 1---refer to that gasket leak is very fast, have little time to measure; Detect following---refer to that very little, the basic inspection of gasket leak does not measure spillage.
In note table 1: specimen size is ф 89mm × ф 49mm, and specimen surface is not coated with sealing compound or covers film, flange surface roughness Ra=0.475 μm.
Claims (10)
1. a fluoro-resin sealing material, is characterized in that, described fluoro-resin sealing material comprises following feed composition and mass percentage:
The mass percentage of described fluoro-resin, hollow glass micropearl, other packing material and processing aid is all for benchmark in the quality sum of fluoro-resin, hollow glass micropearl and other packing material.
2. fluoro-resin sealing material as claimed in claim 1, it is characterized in that, the particle diameter of described hollow glass micropearl is 2 ~ 125 μm, and true density is 0.15 ~ 0.65g/cm
3.
3. fluoro-resin sealing material as claimed in claim 1, it is characterized in that, the median D50 of described hollow glass micropearl is 35 ~ 65 μm.
4. fluoro-resin sealing material as claimed in claim 1, is characterized in that, other packing material described be selected from silicon-dioxide, barium sulfate, aluminum oxide, mullite and kaolin one or more.
5. fluoro-resin sealing material as claimed in claim 1, it is characterized in that, described processing aid is selected from the petroleum hydrocarbon solvent of cut point below 125 DEG C.
6. a fluoro-resin gasket seal, is prepared from by fluoro-resin sealing material as described in any one of Claims 1 to 5.
7. a preparation method for fluoro-resin gasket seal as claimed in claim 6, comprises the following steps:
1) take according to each feed composition mass percentage, and hollow glass micropearl, fluoro-resin and other packing material are uniformly mixed, in mixing process, add processing aid, form mixture;
2) utilize forcing machine by step 1) described in mixture extrusion moulding, formed preform;
3) by step 2) described preform makes sheet material by roll;
4) by step 3) described sheet drying, remove processing aid;
5) dried sheet material is carried out sintering i.e. obtained described fluoro-resin gasket seal.
8. the preparation method of fluoro-resin gasket seal as claimed in claim 7, is characterized in that, step 2) described in extrusion moulding temperature be 19 ~ 40 DEG C.
9. the preparation method of fluoro-resin gasket seal as claimed in claim 7, is characterized in that, step 3) described in roll rolling time, roll shop building is apart from being set as 0.5 ~ 20mm, and roller surface translational speed is 5 ~ 50mm/ second, and roller temperature is 40 ~ 80 DEG C; Temperature during described sintering is 345 ~ 375 DEG C, and sintering time is 0.5h ~ 4.0h.
10. gasket seal or the application of gasket seal in mechanical seal field prepared as claim 7 ~ 9 either method as claimed in claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510047691.5A CN104558976A (en) | 2015-01-29 | 2015-01-29 | Fluororesin sealing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510047691.5A CN104558976A (en) | 2015-01-29 | 2015-01-29 | Fluororesin sealing material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104558976A true CN104558976A (en) | 2015-04-29 |
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ID=53076098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510047691.5A Pending CN104558976A (en) | 2015-01-29 | 2015-01-29 | Fluororesin sealing material |
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| CN (1) | CN104558976A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106243585A (en) * | 2016-08-02 | 2016-12-21 | 巨化集团技术中心 | A kind of fluoropolymer seal material |
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| US4961891A (en) * | 1988-10-04 | 1990-10-09 | Garlock, Inc. | Method of making high compressibility gasket material |
| GB2265627A (en) * | 1992-03-31 | 1993-10-06 | Tba Industrial Products Ltd | Sheet sealing material |
| CN101111552A (en) * | 2004-12-29 | 2008-01-23 | 3M创新有限公司 | Microsphere-filled polytetrafluoroethylene compositions |
| CN102348754A (en) * | 2009-03-31 | 2012-02-08 | 日本华尔卡工业株式会社 | Filled fluororesin sheet, process for producing same, and gasket |
| CN102464843A (en) * | 2010-11-11 | 2012-05-23 | 天津市天塑科技集团有限公司技术中心 | Hollow-microsphere-filled modified PTFE resin |
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2015
- 2015-01-29 CN CN201510047691.5A patent/CN104558976A/en active Pending
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