CN106243585A - A kind of fluoropolymer seal material - Google Patents
A kind of fluoropolymer seal material Download PDFInfo
- Publication number
- CN106243585A CN106243585A CN201610629749.1A CN201610629749A CN106243585A CN 106243585 A CN106243585 A CN 106243585A CN 201610629749 A CN201610629749 A CN 201610629749A CN 106243585 A CN106243585 A CN 106243585A
- Authority
- CN
- China
- Prior art keywords
- fluoropolymer
- fluoropolymer seal
- processing aid
- seal material
- preparation
- 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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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/14—Sealings between relatively-stationary surfaces by means of granular or plastic material, or fluid
Abstract
Present invention mainly discloses a kind of fluoropolymer seal material, described fluoropolymer seal material includes: fluoropolymer 70～95%, polybenzoate 0～10%, kieselguhr 5～20%, other filler 0～20%, processing aid is the 15～21% of solid material total amount, and described fluoropolymer, polybenzoate, kieselguhr, other filler and processing aid etc. are all to be as the criterion with weight/mass percentage composition.Due to containing kieselguhr in the present invention, in the preparation process of encapsulant, kieselguhr is bamboo shape hollow structure, specific surface area is big and particle diameter is thin and uniform, easily adsorb fluoropolymer molecule and between strand, form junction point, material non-deformability under a certain pressure can be effectively improved, and then improve the croop property of fluorinated polymer material.
Description
Technical field
The present invention relates to a kind of fluoropolymer seal material.
Background technology
In prior art, although PTFE stuffing materials has a lot of premium properties, such as good rotproofness, weather-proof
Property, non-sticky, nontoxic, pollution-free and anti-high and low-temp etc., but owing to the helical arrangement structure of politef strand causes molecule
Intermolecular forces is the most weak, intermolecular be easy to slide thus be deformed and creep, and then it is close to directly affect politef
The sealability of sealing and service life.The commonly used filling blend of research worker, chemical modification, radiation modification etc. are each both at home and abroad
The method of kind, to polytetrafluoroethylmodified modified, is important to notice that degree of crystallinity regulation, amorphous region control, politef molecular structure
Arrange and whether form network connection point, the PTFE resin etc. of suitable molecular weight with inorganic filler.Patent publication No.
CN103435947A discloses creep PTFE stuffing materials wear-resistant, low and preparation method and application, used in this patent
Resin matrix be suspension injecting tetrafluoroethylene resin, the PTFE stuffing materials of preparation is wear-resistant, croop property is changed
Kind, but these encapsulants use highdensity filler, and ratio is great, and hardness is high, when using in chemical pipeline because of load not
Foot causes leakage to occur.Patent publication No. CN104558976A discloses a kind of fluororesin encapsulant, used by this patent
Fluororesin is dispersed polytetrafluoroethylresin resin, and the encapsulant of preparation is improved in compression ratio and slip, is not directed to creep
The technology that aspect of performance improves.
Summary of the invention
Present invention aims to many deficiencies of prior art, it is provided that a kind of fluoropolymer seal material, with
Overcome in prior art that the hardness of fluoropolymer seal pad is big, proportion is high, creep relaxation phenomenon is serious, non-deformability
The shortcomings such as difference, size are unstable, and then solve the leakage problem caused because of pad deformation common in chemical industry.
In order to solve above-mentioned technical problem, the present invention adopts the following technical scheme that
A kind of fluoropolymer seal material, described fluoropolymer seal material includes following starting components and quality
Percentage composition:
Further, fluoropolymer uses politef
Further, described politef is dispersed polytetrafluoroethylresin resin, the particle diameter model of dispersed polytetrafluoroethylresin resin
Enclose is 350～750um.
Further, described diatomaceous particle diameter is 35～60um.
Further, one or both in the employing of other filler carbon fibre powder, barium sulfate.
The invention also discloses a kind of fluoropolymer seal pad, by including prepared by above-mentioned fluoropolymer seal material
Form.
The invention also discloses the preparation method of a kind of fluoropolymer seal pad described above, comprise the following steps:
1) weigh according to each raw material components weight/mass percentage composition, then with the sieve that aperture is 2.5mm by fluoropolymer
Sieve, fluoropolymer, kieselguhr, polybenzoate and other filler after sieving is loaded good bubble-tight glass jar, at glass
Add processing aid in glass tank and notice that processing aid must not bedew tank skin；
2) the above-mentioned glass jar having filled raw material is placed on the roller of the roller press with rubber parcel, allows roller with certain
Speed and time rotate, to guarantee material mix homogeneously；
3) by step 2) in glass jar and material be placed in controllable environment；
4) by step 3) material in the glass jar that obtains is by mould and hydraulic means pre-molding, i.e. pre-molding
Part；
5) utilize Material Testing Machine and corresponding mould and mouth die, utilize extruder that pre-molding part is extruded into sheet material；
6) by step 5) described in sheet drying, remove processing aid；
7) dried sheet material is sintered, obtains described fluoropolymer seal pad.
Further, step 2) in the rolling rate of roller of roller press be 30～50r/min, the rolling time be 25～
50min。
Further, step 3) in the temperature of controllable environment be 28～31 DEG C, standing time is 2～4h.
Further, step 7) in dried sheet material sintering time temperature be 365～385 DEG C, sintering time be 1.0～
4.0h。
Due to the fact that and have employed technique scheme, have the advantages that
Due to the fact that containing kieselguhr, in the preparation process of encapsulant, kieselguhr is bamboo shape hollow structure, compares table
Area is big and particle diameter is thin and uniform, easily adsorbs fluoropolymer molecule and forms junction point between strand, can effectively carry
High material non-deformability under a certain pressure, and then improve the croop property of fluorinated polymer material.And this fluoropolymer
Thing gasket seal processing technology is simple, and low cost has preferable creep resistant and pliability.
Instant invention overcomes in prior art that fluoropolymer seal pad hardness is big, proportion is high, creep relaxation phenomenon is tight
Weight, the shortcoming such as non-deformability is poor, size is unstable, and then solve and common in chemical industry deform letting out of causing because of pad
Leakage problem.
Detailed description of the invention
Diatomaceous particle diameter used in following example of the present invention is 35～60um, and processing aid uses cut point
Petroleum hydrocarbon solvent below 125 DEG C, fluoropolymer be particle size range be the dispersed polytetrafluoroethylresin resin of 350～750um.
Comparative example 1
Fluoropolymer seal material in the present embodiment includes following raw material components and weight/mass percentage composition:
The Exxon Mobil Isopars that described processing aid uses model to be ISOPAR E.
Embodiment 1
Fluoropolymer seal material in the present embodiment includes following raw material components and weight/mass percentage composition:
The Exxon Mobil Isopars that described processing aid uses model to be ISOPAR C.
Embodiment 2
Fluoropolymer seal material in the present embodiment includes following raw material components and weight/mass percentage composition:
Described processing aid model is the Exxon Mobil Isopars of ISOPAR E.
Embodiment 3
Fluoropolymer seal material in the present embodiment includes following raw material components and weight/mass percentage composition:
Described processing aid model is the Exxon Mobil Isopars of ISOPAR C.
Embodiment 4
Fluoropolymer seal material in the present embodiment includes following raw material components and weight/mass percentage composition:
The Exxon Mobil Isopars of described processing aid model ISOPAR E.
Comparative example 2
Fluoropolymer seal material in the present embodiment includes following raw material components and weight/mass percentage composition:
Described processing aid model is the Exxon Mobil Isopars of ISOPAR C.
Other filler in the present embodiment is barium sulfate.
Embodiment 5
Fluoropolymer seal material in the present embodiment includes following raw material components and weight/mass percentage composition:
Described processing aid model is the Exxon Mobil Isopars of ISOPAR E.
Other filler described in the present embodiment is barium sulfate.
Embodiment 6
Fluoropolymer seal material in the present embodiment includes following raw material components and weight/mass percentage composition:
Described processing aid model is the Exxon Mobil Isopars of ISOPAR C.
Other filler in the present embodiment is carbon fibre powder.
Embodiment 7
Fluoropolymer seal material in the present embodiment includes following raw material components and weight/mass percentage composition:
Described processing aid model is the Exxon Mobil Isopars of ISOPAR C.
Other filler described in the present embodiment is barium sulfate and carbon fibre powder, and wherein the weight ratio of barium sulfate and carbon fibre powder is 7:
8。
The preparation method of the fluoropolymer seal pad being prepared from by above-described embodiment and comparative example, including following step
Rapid:
1) weigh according to each raw material components weight/mass percentage composition, then with the sieve that aperture is 2.5mm by fluoropolymer
Sieve, fluoropolymer, kieselguhr, polybenzoate and other filler after sieving is loaded in the glass jar that air-tightness is good, then
In glass jar, add processing aid and notice that processing aid must not bedew tank skin；
2) the above-mentioned glass jar having filled raw material is placed on the roller of the roller press with rubber parcel, allows roller with 30r/
The rolling rate of min rotates, and the rolling time is 30min, to guarantee material mix homogeneously；
3) by step 2) in glass jar and material be placed in the controllable environment that temperature is 28～31 DEG C, standing time is
2～4h；
4) by step 3) material in the glass jar that obtains is by mould and hydraulic means pre-molding, i.e. pre-molding
Part；
5) utilize Material Testing Machine and corresponding mould and mouth die, utilize extruder that pre-molding part is extruded into sheet material；
6) by step 5) described in sheet drying, remove processing aid；
7) being sintered by dried sheet material, sintering temperature is 365～385 DEG C, and sintering time is 1.0～4.0h, i.e.
Obtain described fluoropolymer seal pad.
Encapsulant in above-described embodiment and comparative example being made standard specimen, tests creep relaxation, test result is such as
Table 1.
The creep relaxation test result of the standard specimen that table 1 is made up of above-mentioned encapsulant
These are only the specific embodiment of the present invention, but the technical characteristic of the present invention is not limited thereto.Any with this
Based on bright, for solving essentially identical technical problem, it is achieved essentially identical technique effect, done simple change, etc.
With replacement or modification etc., all it is covered by among protection scope of the present invention.
Claims (10)
1. a fluoropolymer seal material, it is characterised in that: described fluoropolymer seal material includes following raw material group
Divide and weight/mass percentage composition:
。
A kind of fluoropolymer seal material the most according to claim 1, it is characterised in that: described fluoropolymer uses
Politef.
A kind of fluoropolymer seal material the most according to claim 2, it is characterised in that: described politef is for dividing
Dissipating polyflon, the particle size range of described dispersed polytetrafluoroethylresin resin is 350～750um.
A kind of fluoropolymer seal material the most according to claim 1, it is characterised in that: described diatomaceous particle diameter is
35～60um.
A kind of fluoropolymer seal material the most according to claim 1, it is characterised in that: other fillers described use carbon
One or both in fine powder, barium sulfate.
6. a fluoropolymer seal pad, by fluoropolymer seal material preparation described in any one of claims 1 to 3
Become.
7. a preparation method for fluoropolymer seal pad as claimed in claim 7, comprises the following steps:
1) weigh according to each raw material components weight/mass percentage composition, then with the sieve that aperture is 2.5mm, fluoropolymer sieved,
Fluoropolymer, kieselguhr, polybenzoate and other filler after sieving is loaded in the glass jar that air-tightness is good, then at glass
Add processing aid in glass tank and notice that processing aid must not bedew tank skin；
2) the above-mentioned glass jar having filled raw material is placed on the roller of the roller press with rubber parcel, allows roller with certain rolling
Speed and time rotate, to guarantee material mix homogeneously；
3) by step 2) in glass jar and material be placed in controllable environment；
4) by step 3) material in the glass jar that obtains is by mould and hydraulic means pre-molding, i.e. pre-molding part；
5) utilize Material Testing Machine and corresponding mould and mouth die, utilize extruder that pre-molding part is extruded into sheet material；
6) by step 5) described in sheet drying, remove processing aid；
7) dried sheet material is sintered, obtains described fluoropolymer seal pad.
The preparation method of a kind of fluoropolymer seal pad the most according to claim 5, it is characterised in that:
Step 2) in the rolling rate of roller of roller press be 30～50r/min, the rolling time is 25～50min.
The preparation method of a kind of fluoropolymer seal pad the most according to claim 5, it is characterised in that:
Step 3) in the temperature of controllable environment be 28～31 DEG C, standing time is 2～4h.
The preparation method of a kind of fluoropolymer seal pad the most according to claim 5, it is characterised in that:
Step 7) in dried sheet material sintering time temperature be 365～385 DEG C, sintering time is 1.0～4.0h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610629749.1A CN106243585A (en) | 2016-08-02 | 2016-08-02 | A kind of fluoropolymer seal material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610629749.1A CN106243585A (en) | 2016-08-02 | 2016-08-02 | A kind of fluoropolymer seal material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106243585A true CN106243585A (en) | 2016-12-21 |
Family
ID=57606684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610629749.1A Pending CN106243585A (en) | 2016-08-02 | 2016-08-02 | A kind of fluoropolymer seal material |
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| Country | Link |
|---|---|
| CN (1) | CN106243585A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835446A (en) * | 2018-08-15 | 2020-02-25 | 中昊晨光化工研究院有限公司 | Low-temperature flexible high-wear-resistance fluororubber compound and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1464023A (en) * | 2002-06-11 | 2003-12-31 | 上海上化氟材料有限公司 | Stuffing perfluoroethylene material for oil sealing element and process for preparing the same |
| CN102702653A (en) * | 2012-06-07 | 2012-10-03 | 深圳市明鑫高分子技术有限公司 | Teflon-polybenzoate compounded product and preparation method thereof |
| CN104558976A (en) * | 2015-01-29 | 2015-04-29 | 日本华尔卡工业株式会社 | Fluororesin sealing material |
| CN104650514A (en) * | 2015-03-24 | 2015-05-27 | 苏州新区华士达工程塑胶有限公司 | Novel polytetrafluoroethylene gasket material |
-
2016
- 2016-08-02 CN CN201610629749.1A patent/CN106243585A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1464023A (en) * | 2002-06-11 | 2003-12-31 | 上海上化氟材料有限公司 | Stuffing perfluoroethylene material for oil sealing element and process for preparing the same |
| CN102702653A (en) * | 2012-06-07 | 2012-10-03 | 深圳市明鑫高分子技术有限公司 | Teflon-polybenzoate compounded product and preparation method thereof |
| CN104558976A (en) * | 2015-01-29 | 2015-04-29 | 日本华尔卡工业株式会社 | Fluororesin sealing material |
| CN104650514A (en) * | 2015-03-24 | 2015-05-27 | 苏州新区华士达工程塑胶有限公司 | Novel polytetrafluoroethylene gasket material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835446A (en) * | 2018-08-15 | 2020-02-25 | 中昊晨光化工研究院有限公司 | Low-temperature flexible high-wear-resistance fluororubber compound and preparation method thereof |
| CN110835446B (en) * | 2018-08-15 | 2021-03-02 | 中昊晨光化工研究院有限公司 | Low-temperature flexible high-wear-resistance fluororubber compound and preparation method thereof |
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| PB01 | Publication | ||
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Application publication date: 20161221 |