CN102344682B - Modified nylon 66 material for valve seat sealing ring - Google Patents
Modified nylon 66 material for valve seat sealing ring Download PDFInfo
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- CN102344682B CN102344682B CN 201110294705 CN201110294705A CN102344682B CN 102344682 B CN102344682 B CN 102344682B CN 201110294705 CN201110294705 CN 201110294705 CN 201110294705 A CN201110294705 A CN 201110294705A CN 102344682 B CN102344682 B CN 102344682B
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Abstract
The invention discloses a modified nylon 66 material for a valve seat sealing ring. The modified nylon 66 material comprises the following components in percentage by mass: 63.5-65.2% of nylon 66, 14.2-15.8% of polytetrafluoroethylene, 9.2-10.7% of aluminum bronze powder, 9.3-11% of Grafoil graphite and 0.44-0.55% of other additives, wherein the modified nylon 66 material comprises the following additive components in percentage by mass: 0.12-0.17% of maleic anhydride grafted polypropylene, 0.18-0.21% of glass fiber and 0.14-0.17% of carbon fiber. The valve seat sealing ring manufactured from the modified nylon 66 material has strength enhancement performance, toughness enhancement performance, rub resistance, weather resistance, self lubrication and high tensile property, and has obvious advantages as compared with the traditional sealing ring.
Description
Technical field
The present invention relates to the valve base sealing loop material, relate in particular to a kind of modified nylon 66 material for valve seat insert.
Background technology
Current energy industry development is rapid, and the exploitation of oil, Sweet natural gas equal energy source and transmission need to be used the valve of a large amount of pipelines and control pipeline.Mostly in awful weather, topography and geomorphology extreme difference, the rare area of human footmarks, physical environment and weather are extremely abominable in the new place of production of oil, Sweet natural gas equal energy source, and be very high to the performance quality requirement of energy transport pipeline.And ducted medium often contains foreign material even sandstone arranged, and the design of giving pipeline valve proposes a very large difficult problem with using, and sealing-ring is as requisite significant components in the pipeline valve, and its performance quality has determined behaviour in service and the life-span of valve.
Multiplex tetrafluoroethylene is as valve seat insert in the present stage pipeline valve.Although tetrafluoroethylene has good sealing property, its mechanical property is bad, and tensile strength, ultimate compression strength are not high, and resilience is poor.Domestic and international also useful nylon 66, perhaps with the sealing-ring as pipeline valve such as nylon 66 filled glass fibers, nylon 66 filled polytetrafluoroethylenes, nylon 66 filling carbon fibres, but above-mentioned materials can not have the premium properties of each component simultaneously, the over-all properties of sealing-ring is bad, and the space still improves a lot.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of modified nylon 66 material that is used for valve seat insert that has simultaneously enhancing, toughness reinforcing, rub resistance, weather-proof, self-lubricating, high tensile property is provided.
The modified nylon 66 material that is used for valve seat insert, take the component of mass percentage content modified nylon 66 material as: nylon 66 content as 63.5%～65.2%, polytetrafluoroethylene content as 14.2%～15.8%, the xantal powder content as 9.2%～10.7%, the Grafoil content of graphite as 9.3%～11%, other additive level is as 0.44%～0.55%.
The mass percent that the component of described other additive accounts for modified nylon 66 material is: maleic anhydride inoculated polypropylene content is 0.12%～0.17%, content of glass fiber is 0.18%～0.21%, carbon fibre content is 0.14%～0.17%.
Modification of nylon 66 valve seat inserts provided by the invention, adopting nylon 66 is main raw material(s), improved the comprehensive mechanical property of sealing-ring, tetrafluoroethylene can improve weathering resistance and the wear resistance of sealing-ring as the weighting material of modification of nylon 66, Grafoil graphite can improve the weathering resistance of sealing-ring, and playing self-lubricating function, the use of maleic anhydride inoculated polypropylene, carbon fibre and glass fibre can improve toughness, intensity, the tensile property of sealing-ring.Modification of nylon 66 valve seat inserts provided by the invention have enhancing, toughness reinforcing, rub resistance, weather-proof, self-lubricating, high tensile property simultaneously, have compared significant advantage with the conventional seals circle.
Embodiment
The modified nylon 66 material that is used for valve seat insert, take the component of mass percentage content modified nylon 66 material as: nylon 66 content as 63.5%～65.2%, polytetrafluoroethylene content as 14.2%～15.8%, the xantal powder content as 9.2%～10.7%, the Grafoil content of graphite as 9.3%～11%, other additive level is as 0.44%～0.55%.The mass percent that the component of described other additive accounts for modified nylon 66 material is: maleic anhydride inoculated polypropylene content is 0.12%～0.17%, content of glass fiber is 0.18%～0.21%, carbon fibre content is 0.14%～0.17%.
In the synthesis technique of this modified nylon 66 material, at first add 63.5%～65.2% nylon 66, and be heated to 320 ℃ of fusings, then add simultaneously 14.2%～15.8% tetrafluoroethylene and 9.3%～11% Grafoil graphite, other additive of rear interpolation 0.44%～0.55% stirs, comprise 0.12%～0.17% maleic anhydride inoculated polypropylene, 0.18%～0.21% glass fibre and 0.14%～0.17% carbon fibre, add at last 9.2%～10.7% xantal powder, stir, this process continuous heating, mixture temperature remain on 320 ℃.With the spiral press injector modification of nylon 66 plastic extrusions of melting are advanced the sealing-ring forming mould, sealing-ring is taken out in the pressurize moulding after the water-cooled.The valve seat insert that utilizes this technique and modified nylon 66 material to make, tensile strength is 110～120MPa, slip resistance is 68～72MPa, compressive strength can reach 155～163MPa, flexural strength can reach 168～175MPa, and wear resisting property, compression recovery performance are excellent, and flame retardant resistance, abrasion resistance are fabulous, have self-lubricating function, can adapt to-60～80 ℃ Working environment.
Compared to domestic traditional sealing-ring, the present invention adopts modification of nylon 66 to be main raw material(s), tetrafluoroethylene is auxiliary packing material, compared to external nylon 66 sealing-rings, the modification of nylon 66 that the present invention adopts take tetrafluoroethylene, xantal powder, Grafoil graphite and other additive as simultaneously as weighting material, but not single weighting material.
Nylon 66 is typical hard and tough polyamide polymers, because good toughness, deformability is strong, therefore is the excellent materials as sealing-ring, and wear resisting property is excellent, and comprehensive mechanical property is better than the general-purpose plastics such as tetrafluoroethylene.
The tetrafluoroethylene mechanical property is bad, and tensile strength, ultimate compression strength are not high, and resilience is poor, can reduce sealing-ring use properties and life-span as sealing ring material separately.But tetrafluoroethylene has good sealing property, high temperature resistant, low temperature resistant and wear resisting property, reduces the content of tetrafluoroethylene, uses as weighting material, can improve the over-all properties of sealing-ring.The filling aluminum bronze powder can reduce frictional coefficient, improve the ultimate compression strength of material, makes simultaneously sealing-ring have self-lubricating function, and Grafoil graphite can improve weather-proof, the resistance to elevated temperatures of sealing-ring, simultaneously as lubricant, reduces wearing and tearing.
The adding of maleic anhydride inoculated polypropylene has significant toughening effect to nylon 66, and carbon fibre and glass fibre can improve intensity, tensile property and the resistance to elevated temperatures of sealing-ring as toughener.
Embodiment 1:
The modified nylon 66 material that is used for valve seat insert, take the component of mass percentage content modified nylon 66 material as: nylon 66 content as 64.5%, polytetrafluoroethylene content as 15%, xantal powder content 10%, Grafoil content of graphite as 10%, other additive level is as 0.5%.The mass percent that the component of described other additive accounts for modified nylon 66 material is: maleic anhydride inoculated polypropylene content is 0.15%, content of glass fiber is 0.2%, carbon fibre content is 0.15%.
In the synthesis technique of this modified nylon 66 material, at first add 64.5% nylon 66, and be heated to 320 ℃ of fusings, then add simultaneously 15% tetrafluoroethylene and 10% Grafoil graphite, other additive of the rear interpolation 0.5% that stirs comprises 0.15% maleic anhydride inoculated polypropylene, 0.2% glass fibre and 0.15% carbon fibre, add at last 10% xantal powder, stir, this process continuous heating, mixture temperature remain on 320 ℃.With the spiral press injector modification of nylon 66 plastic extrusions of melting are advanced the sealing-ring forming mould, sealing-ring is taken out in the pressurize moulding after the water-cooled.The valve seat insert that utilizes this technique and modified nylon 66 material to make, tensile strength is 112～118MPa, slip resistance is 68～70MPa, compressive strength can reach 157～163MPa, flexural strength can reach 168～172MPa, and wear resisting property, compression recovery performance are excellent, and flame retardant resistance, abrasion resistance are fabulous, have self-lubricating function, can adapt to-65～78 ℃ Working environment.
Embodiment 2:
The modified nylon 66 material that is used for valve seat insert, take the component of mass percentage content modified nylon 66 material as: nylon 66 content as 65.1%, polytetrafluoroethylene content as 14.4%, xantal powder content 10.2%, Grafoil content of graphite as 9.8%, other additive level is as 0.5%.The mass percent that the component of described other additive accounts for modified nylon 66 material is: maleic anhydride inoculated polypropylene content is 0.13%, content of glass fiber is 0.21%, carbon fibre content is 0.16%.
In the synthesis technique of this modified nylon 66 material, at first add 65.1% nylon 66, and be heated to 320 ℃ of fusings, then add simultaneously 14.4% tetrafluoroethylene and 9.8% Grafoil graphite, other additive of the rear interpolation 0.5% that stirs comprises 0.13% maleic anhydride inoculated polypropylene, 0.21% glass fibre and 0.16% carbon fibre, add at last 10.2% xantal powder, stir, this process continuous heating, mixture temperature remain on 320 ℃.With the spiral press injector modification of nylon 66 plastic extrusions of melting are advanced the sealing-ring forming mould, sealing-ring is taken out in the pressurize moulding after the water-cooled.The valve seat insert that utilizes this technique and modified nylon 66 material to make, tensile strength is 114～117MPa, slip resistance is 68～70MPa, compressive strength can reach 158～163MPa, flexural strength can reach 167～171MPa, and wear resisting property, compression recovery performance are excellent, and flame retardant resistance, abrasion resistance are fabulous, have self-lubricating function, can adapt to-65～80 ℃ Working environment.
Embodiment 3:
The modified nylon 66 material that is used for valve seat insert, take the component of mass percentage content modified nylon 66 material as: nylon 66 content as 64.2%, polytetrafluoroethylene content as 15.5%, xantal powder content 9.7%, Grafoil content of graphite as 10.1%, other additive level is as 0.5%.The mass percent that the component of described other additive accounts for modified nylon 66 material is: maleic anhydride inoculated polypropylene content is 0.16%, content of glass fiber is 0.19%, carbon fibre content is 0.15%.
In the synthesis technique of this modified nylon 66 material, at first add 64.2% nylon 66, and be heated to 320 ℃ of fusings, then add simultaneously 15.5% tetrafluoroethylene and 10.1% Grafoil graphite, other additive of the rear interpolation 0.5% that stirs comprises 0.16% maleic anhydride inoculated polypropylene, 0.19% glass fibre and 0.15% carbon fibre, add at last 9.7% xantal powder, stir, this process continuous heating, mixture temperature remain on 320 ℃.With the spiral press injector modification of nylon 66 plastic extrusions of melting are advanced the sealing-ring forming mould, sealing-ring is taken out in the pressurize moulding after the water-cooled.The valve seat insert that utilizes this technique and modified nylon 66 material to make, tensile strength is 112～118MPa, slip resistance is 68～72MPa, compressive strength can reach 157～163MPa, flexural strength can reach 169～174MPa, and wear resisting property, compression recovery performance are excellent, and flame retardant resistance, abrasion resistance are fabulous, have self-lubricating function, can adapt to-60～75 ℃ Working environment.
Claims (1)
1. modified nylon 66 material that is used for valve seat insert, it is characterized in that take the component of mass percentage content modified nylon 66 material as: nylon 66 content as 63.5%～65.2%, polytetrafluoroethylene content as 14.2%～15.8%, the xantal powder content as 9.2%～10.7%, the Grafoil content of graphite as 9.3%～11%, other additive level is as 0.44%～0.55%; The mass percent that the component of described other additive accounts for modified nylon 66 material is: maleic anhydride inoculated polypropylene content is 0.12%～0.17%, content of glass fiber is 0.18%～0.21%, carbon fibre content is 0.14%～0.17%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110294705 CN102344682B (en) | 2011-09-28 | 2011-09-28 | Modified nylon 66 material for valve seat sealing ring |
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| CN 201110294705 CN102344682B (en) | 2011-09-28 | 2011-09-28 | Modified nylon 66 material for valve seat sealing ring |
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| CN102344682A CN102344682A (en) | 2012-02-08 |
| CN102344682B true CN102344682B (en) | 2013-04-10 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103030907A (en) * | 2012-12-20 | 2013-04-10 | 常熟市董浜镇徐市盛峰液压配件厂 | Large and high-performance O-shaped sealing ring |
| CN103029303B (en) * | 2012-12-20 | 2014-11-05 | 太仓市天合新材料科技有限公司 | Method for preparing large and high-performance O-shaped sealing ring |
| CN103756205A (en) * | 2013-12-12 | 2014-04-30 | 安徽凯特泵业有限公司 | Glass fiber nylon reinforced polytetrafluoroethylene material for pump valve |
| CN104893230B (en) * | 2015-05-06 | 2018-02-16 | 辽宁航宇星物联仪表科技有限公司 | A kind of diaphragm gas meter bonnet valve seat material |
| CN106675013B (en) * | 2016-12-15 | 2019-01-08 | 苏州博云塑业有限公司 | A kind of nylon 66 composite material and preparation method and application |
| CN106675014B (en) * | 2016-12-24 | 2019-08-06 | 江苏博云塑业股份有限公司 | A kind of nylon 66 composite material and preparation method |
| CN107201571A (en) * | 2017-06-30 | 2017-09-26 | 苏州广能电子科技有限公司 | A kind of console dustproof fiber beam |
| CN108047550A (en) * | 2017-12-12 | 2018-05-18 | 吴江市强塑阀门管件厂 | Add the preparation method of polytetrafluoroethylene (PTFE) high-strength wearable sealing ring |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1590455A (en) * | 2003-09-05 | 2005-03-09 | 中国科学院兰州化学物理研究所 | Abrasion resistant self lubricating nylon complex material and its preparation method |
| CN1607219A (en) * | 2003-10-14 | 2005-04-20 | 林安良 | High self-lubricating, high wear resisting, reinforced nylon engineering plastic alloy and method for making same |
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| US20030192448A1 (en) * | 2002-04-10 | 2003-10-16 | Leasure John D. | Lead free reduced ricochet limited penetration projectile |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1590455A (en) * | 2003-09-05 | 2005-03-09 | 中国科学院兰州化学物理研究所 | Abrasion resistant self lubricating nylon complex material and its preparation method |
| CN1607219A (en) * | 2003-10-14 | 2005-04-20 | 林安良 | High self-lubricating, high wear resisting, reinforced nylon engineering plastic alloy and method for making same |
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Application publication date: 20120208 Assignee: Zhejiang Crete Valve Co., Ltd. Assignor: China Kelite Group Co., Ltd. Contract record no.: 2013330000201 Denomination of invention: Modified nylon 66 material for valve seat sealing ring Granted publication date: 20130410 License type: Exclusive License Record date: 20130619 |
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