CN105462121A - Preparation method of PTFE and PI blended alloy - Google Patents
Preparation method of PTFE and PI blended alloy Download PDFInfo
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- CN105462121A CN105462121A CN201610010977.0A CN201610010977A CN105462121A CN 105462121 A CN105462121 A CN 105462121A CN 201610010977 A CN201610010977 A CN 201610010977A CN 105462121 A CN105462121 A CN 105462121A
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- ptfe
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- 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
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- 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
- B29C69/02—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 of moulding techniques only
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention relates to a preparation method of a PTFE and PI blended alloy and belongs to the technical field of blended alloys. The preparation method of the PTFE and PI blended alloy comprises the steps that 1, PTFE and PI are blended: firstly, PTFE suspension resin and PI resin are subjected to dry processing under the vacuum condition for 2-4 hours; secondly, the PTFE suspension resin is added into a mixer, and the mixer runs at low speed; polyimide resin is added into the mixer, the mixer first runs at low speed and then runs at high speed, the mass ratio of polytetrafluoroethylene suspension resin to polyimide resin is (1-10):2; 2, the blended material is pressed: the evenly mixed polytetrafluoroethylene suspension resin and the polyimide resin are blended and pressed under the condition of 0.3-0.8 MPa for forming. The preparation method has the advantages of being simple in process and convenient to operate, being resistant to high temperature, abrasion and corrosion, being capable of bearing high load, low in friction coefficient, good in self-lubricating property, high in strength, remarkable in impact resistance performance, long in service life and the like.
Description
Technical field
The invention belongs to blend alloy technical field, particularly relate to a kind of preparation method of PTFE and PI blend alloy.
Background technology
At present, tetrafluoroethylene (PTFE) has excellent use properties, has high and low temperature resistance, and life-time service temperature reaches 200 ~ 260 DEG C, still soft at-100 DEG C; Its good corrosion resistance, the strong acid, highly basic, organic solvent etc. of ability chloroazotic acid and any concentration; Weather is good, has aging life-span best in plastics; There is good self lubricity, and its excellent electrical properties, insulation resistance is high, and specific inductivity is little, is a kind of macromolecular material of excellent performance.Be processed into polytetrafluoroethylsteel steel bar, tubing, sheet material and turning sheet material, raw material band etc., as the corrosion-resistant material in chemical industry equipment, as lining, pipeline etc., high-grade insulating materials in electric industry, high frequency cable etc., slow speed of revolution sliding surface bearing, food, friction of motion component in textile manufacturing machine, and the bridge in building industry, tunnel, artificial blood vessel on the displacement support slipper of storage tank and medicine equipment, sterilizers etc. use, be widely used in defence and military, nuclear power, oil, wireless, electric machinery, the important departments such as chemical industry.But there is the high problem of poor mechanical property, injection moulding difficulty and cost in it, therefore needs to carry out modification to it, improve the over-all properties of tetrafluoroethylene (PTFE).
Polyimide (PI), refer to the class superpolymer being called the repeating unit of imide ring (-CO-NH-CO-) on its main chain containing one, the macromolecule polymer material of PI or a kind of excellent property, it not only has high-modulus, high strength; Also ability 400 DEG C of high temperature; Meanwhile, PI also can be low temperature resistant, can under the temperature range of-200 ~ 300 DEG C, life-time service, and the insulating property of PI are also fine, also have the advantages such as fire-retardant.Although the advantage of PI is really a lot, it still also also exists weak point, such as machine-shaping difficulty, usually selects to adopt the method for modification to improve the deficiency of PI.But, there is a variety of method all can carry out modification to PI, such as, on PI molecular backbone chain, by introduced feature functional group group, carry out modification by copolymerization with PI and modification is carried out to it; Or PI molecular chain is introduced functional side base, process modification is carried out to it; PI and other high molecular polymers can also be allowed to carry out blending and modifying, improve its over-all properties; Or in PI, add mineral filler (as the mineral filler such as fiber substance, mineral powder) carry out the multiple method of modifying such as blending modification.
Summary of the invention
The present invention provides a kind of preparation method of PTFE and PI blend alloy for solving in known technology the technical problem that exists.
The object of this invention is to provide one, to have technique simple, easy to operate; Product is high temperature resistant, wear-resistant, can bear high-load, high strength, and shock resistance is remarkable, corrosion-resistant, the preparation method of PTFE and the PI blend alloy of the features such as long service life.
The technical scheme that the preparation method of PTFE and PI blend alloy of the present invention takes is:
A preparation method for PTFE and PI blend alloy, is characterized in that: the preparation process of PTFE and PI blend alloy comprises,
(1) PTFE and PI is blended
First, by polytetrafluoroethylene PTFE suspending resin and polyimide PI resin under vacuum, drying treatment 2 ~ 4h is carried out; Then, PTFE suspending resin is added mixing machine, and low cruise is broken up; Again polyimide resin is added mixing machine, first low cruise, then high-speed cruising, two kinds of resins are fully mixed, the mass ratio of polytetrafluoroethylsuspending suspending resin and polyimide resin is 1 ~ 10:2;
(2) blend composition compacting
The polytetrafluoroethylsuspending suspending resin mixed and polyimide resin blend composition, under 0.3 ~ 0.8MPa condition, press forming.
The preparation method of PTFE and PI blend alloy of the present invention can also adopt following technical scheme:
The preparation method of described PTFE and PI blend alloy, is characterized in: after blend composition press forming, sinter molding at the temperature of 300 ~ 400 DEG C.
The preparation method of described PTFE and PI blend alloy, is characterized in: during blend composition compacting, be pressed into pole shape.
The preparation method of described PTFE and PI blend alloy, is characterized in: the particle diameter of polyimide resin is less than or equal to 1.1 times of polytetrafluoroethylsuspending suspending resin particle diameter.
The preparation method of described PTFE and PI blend alloy, is characterized in: when PTFE and PI is blended, polytetrafluoroethylsuspending suspending resin and polyimide resin carry out drying treatment in vacuum drying oven.
The preparation method of described PTFE and PI blend alloy, be characterized in: when PTFE and PI is blended, PTFE suspending resin is added mixing machine, and the rotating speed of low cruise is 50 ~ 200rpm, working time 5 ~ 15s, after again polyimide resin being added mixing machine, the rotating speed of first low cruise is 50 ~ 200rpm, working time 15 ~ 25s, the rotating speed of high-speed cruising is 600 ~ 1000rpm again, working time 30 ~ 50s.
The preparation method of described PTFE and PI blend alloy, is characterized in: polytetrafluoroethylsuspending suspending resin, by suspension granularity resin is obtained through presintering, pulverizing.
The advantage that the present invention has and positively effect are:
The preparation method of PTFE and PI blend alloy is owing to have employed the brand-new technical scheme of the present invention, compared with prior art, the present invention is by PTFE suspending resin and PI resin, prepare blend composition, by choosing suitable proportioning, control the processing parameter etc. in preparation process, obtain the blended rod of high performance PTFE-PI, the shock strength of intermingling material and friction and wear behavior and high thermal resistance are all significantly improved.
It is simple, easy to operate that the present invention has technique; Product is high temperature resistant, wear-resistant, and can bear high-load, low-friction coefficient, self-lubricating property is excellent; High strength, shock resistance is not remarkable, fragile in assembling, use procedure, come off; Corrosion-resistant, organic and inorganic solvent and lubricating grease affect little, the advantages such as long service life.
Embodiment
For summary of the invention of the present invention, Characteristic can be understood further, hereby exemplify following examples, and be described in detail as follows:
Embodiment 1
A preparation method for PTFE and PI blend alloy, its preparation process comprises following processing step:
(1) PTFE and PI is blended
First, by polytetrafluoroethylene PTFE suspending resin and polyimide PI resin under vacuum, drying treatment 4h is carried out; Then, PTFE suspending resin is added mixing machine, and low cruise is broken up; Again polyimide resin is added mixing machine, first low cruise, then high-speed cruising, two kinds of resins are fully mixed, the mass ratio of polytetrafluoroethylsuspending suspending resin and polyimide resin is 4:1;
(2) blend composition compacting
The polytetrafluoroethylsuspending suspending resin mixed and polyimide resin blend composition, under 0.3 ~ 0.8MPa condition, be pressed into pole shape.
(3) sinter molding
After blend composition press forming, sinter molding at the temperature of 375 DEG C.
The specific implementation process of the present embodiment:
PTFE and PI blend alloy prepare self-oiling bearing, axle sleeve:
Proportioning raw materials: PTFE80kg, PI20kg; The particle diameter of tetrafluoroethylene (PTFE) suspending resin is 130 μm, and the particle diameter of blend composition polyimide (PI) resin is 100 μm.
Polytetrafluoroethylmaterial material is suspension injecting tetrafluoroethylene resin, and it is by suspension granularity resin is obtained through presintering, pulverizing, and good fluidity, the surface smooth finish of this PTFE suspending resin are good, and particle diameter can sieve, and is applicable to extruding pipe material, bar and profiled material etc.The raw material choose trade mark is tetrafluoroethylene (PTFE) suspending resin of DF-16A, and the particle diameter of blend composition polyimide (PI) resin is close or be less than PTFE, and its particle is more thin better.
In vacuum drying oven, after drying treatment 4h is carried out to the two, according to the proportioning of PTFE:PI=4:1, take the PI resin of PTFE and 20kg of 80kg, first PTFE suspending resin is joined in high-speed mixer, low cruise 10 second, the rotating speed of low cruise is 100rpm, it fully to be broken up, PI resin joins in high-speed mixer, low cruise 20 second, the rotating speed of low cruise is 100rpm, in high-speed cruising 40 second again, the rotating speed of high-speed cruising is 800rpm, the two is fully mixed.Take intermingling material about the 11kg (whether specifically take weight by suppressing rear observation rod is circular decision) mixed, by it under 0.5MPa condition, be pressed into pole shape, sinter molding at the temperature of 375 DEG C, is finally processed into the bearing of specified shape, axle sleeve.
Product is high temperature resistant, can under 240 DEG C of conditions life-time service; Wear-resistant, can high-load be born, long service life; Low-friction coefficient, self-lubricating property is excellent; ; High strength, shock resistance is not remarkable, fragile in assembling, use procedure, come off; Corrosion-resistant, organic and inorganic solvent and lubricating grease etc. can not have an impact to it.
Claims (7)
1. a preparation method for PTFE and PI blend alloy, is characterized in that: the preparation process of PTFE and PI blend alloy comprises,
(1) PTFE and PI is blended
First, by polytetrafluoroethylene PTFE suspending resin and polyimide PI resin under vacuum, drying treatment 2 ~ 4h is carried out; Then, PTFE suspending resin is added mixing machine, and low cruise is broken up; Again polyimide resin is added mixing machine, first low cruise, then high-speed cruising, two kinds of resins are fully mixed, the mass ratio of polytetrafluoroethylsuspending suspending resin and polyimide resin is 1 ~ 10:2;
(2) blend composition compacting
The polytetrafluoroethylsuspending suspending resin mixed and polyimide resin blend composition, under 0.3 ~ 0.8MPa condition, press forming.
2. the preparation method of PTFE and PI blend alloy according to claim 1, is characterized in that: after blend composition press forming, sinter molding at the temperature of 300-400 DEG C.
3. the preparation method of PTFE and PI blend alloy according to claim 1, is characterized in that: during blend composition compacting, be pressed into pole shape.
4. the preparation method of PTFE and the PI blend alloy according to claim 1,2 or 3, is characterized in that: the particle diameter of polyimide resin is less than or equal to 1.1 times of polytetrafluoroethylsuspending suspending resin particle diameter.
5. the preparation method of PTFE and the PI blend alloy according to claim 1,2 or 3, is characterized in that: when PTFE and PI is blended, polytetrafluoroethylsuspending suspending resin and polyimide resin carry out drying treatment in vacuum drying oven.
6. the preparation method of PTFE and the PI blend alloy according to claim 1,2 or 3, it is characterized in that: when PTFE and PI is blended, PTFE suspending resin is added mixing machine, and the rotating speed of low cruise is 50 ~ 200rpm, working time 5 ~ 15s, after again polyimide resin being added mixing machine, the rotating speed of first low cruise is 50 ~ 200rpm, working time 15 ~ 25s, the rotating speed of high-speed cruising is 600 ~ 1000rpm again, working time 30 ~ 50s.
7. the preparation method of PTFE and the PI blend alloy according to claim 1,2 or 3, is characterized in that: polytetrafluoroethylsuspending suspending resin, by suspension granularity resin is obtained through presintering, pulverizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610010977.0A CN105462121A (en) | 2016-01-04 | 2016-01-04 | Preparation method of PTFE and PI blended alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610010977.0A CN105462121A (en) | 2016-01-04 | 2016-01-04 | Preparation method of PTFE and PI blended alloy |
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| Publication Number | Publication Date |
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| CN105462121A true CN105462121A (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610010977.0A Pending CN105462121A (en) | 2016-01-04 | 2016-01-04 | Preparation method of PTFE and PI blended alloy |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109593307A (en) * | 2018-12-18 | 2019-04-09 | 南京肯特复合材料股份有限公司 | PTFE composite piston ring and preparation method thereof |
| CN109593306A (en) * | 2018-11-20 | 2019-04-09 | 浙江巨化新材料研究院有限公司 | One kind being used for coated glass fiber beaming device PTFE material and preparation method |
| CN116589729A (en) * | 2023-06-25 | 2023-08-15 | 江西漠舟新材料有限公司 | Preparation method of modified polytetrafluoroethylene raw material tape |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719042A (en) * | 2012-06-19 | 2012-10-10 | 天津市天塑科技集团有限公司技术中心 | Self-lubrication wear-resistant modified PTFE (Poly Tetra Fluoro Ethylene) sealing material |
-
2016
- 2016-01-04 CN CN201610010977.0A patent/CN105462121A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719042A (en) * | 2012-06-19 | 2012-10-10 | 天津市天塑科技集团有限公司技术中心 | Self-lubrication wear-resistant modified PTFE (Poly Tetra Fluoro Ethylene) sealing material |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109593306A (en) * | 2018-11-20 | 2019-04-09 | 浙江巨化新材料研究院有限公司 | One kind being used for coated glass fiber beaming device PTFE material and preparation method |
| CN109593306B (en) * | 2018-11-20 | 2021-01-05 | 浙江巨化新材料研究院有限公司 | PTFE material for glass fiber coating and bundling device and preparation method |
| CN109593307A (en) * | 2018-12-18 | 2019-04-09 | 南京肯特复合材料股份有限公司 | PTFE composite piston ring and preparation method thereof |
| CN116589729A (en) * | 2023-06-25 | 2023-08-15 | 江西漠舟新材料有限公司 | Preparation method of modified polytetrafluoroethylene raw material tape |
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Application publication date: 20160406 |
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