CN102825792A - Preparation method of ultralong thin-walled pressure- and heat-resistant polytetrafluoroethylene dispersion resin heat exchange tube - Google Patents
Preparation method of ultralong thin-walled pressure- and heat-resistant polytetrafluoroethylene dispersion resin heat exchange tube Download PDFInfo
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- CN102825792A CN102825792A CN2012103306518A CN201210330651A CN102825792A CN 102825792 A CN102825792 A CN 102825792A CN 2012103306518 A CN2012103306518 A CN 2012103306518A CN 201210330651 A CN201210330651 A CN 201210330651A CN 102825792 A CN102825792 A CN 102825792A
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Abstract
The invention relates to fluoroplastic manufacturing technology, in particular to an ultralong thin-walled pressure and heat-resistant polytetrafluoroethylene (PTFE) dispersion resin heat exchange tube. The ultralong thin-walled pressure and heat-resistant polytetrafluoroethylene (PTFE) dispersion resin heat exchange tube is prepared from polytetrafluoroethylene (PTFE) dispersion resin by means of material mixing, aging and infiltrating, pre-press forming, extruding forming, drying to remove oil, high temperature sintering, quenching treatment and finished product reeling. According to the invention, the material formula and the production technology of the ultralong thin-walled pressure and heat-resistant polytetrafluoroethylene (PTFE) dispersion resin heat exchange tube are improved, so that a continuous, uniform and stable method for producing the ultralong thin-walled pressure and heat-resistant polytetrafluoroethylene (PTFE) dispersion resin heat exchange tube is provided.
Description
Technical field
The present invention relates to the fluoroplastics manufacturing technology, is a kind of overlength polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube.
Background technology
Fluoroplastics be part or all of hydrogen by the substituted alkane polymer of fluorine, have that chemical stability is good, good insulating and an advantage such as corrosion-resistant.Polytetrafluoroethylene (PTFE) is being undertaken the mission of functional new material as a member of fluoroplastics family, has electrical insulating property, chemical stability, corrosion resistance best in the fluoroplastics, is one of decay resistance optimal material in the world today.The tubing that polytetrafluoroethyldispersion dispersion resin (PTFE) is processed can be that pure resin material also can be material modified, and its scope of application is very wide, can be used as chemical anticorrosion, electrical apparatus insulation, recuperation of heat etc.Yet polytetrafluoroethyldispersion dispersion resin (PTFE) but has extremely narrow phase transformation range and loose resilient characteristic, thereby makes it be difficult to be processed into the bigger tubing of length.And general large diameter polytetrafluoroethylore dispersion resin (PTFE) tube wall thickness is bigger, on the scope of application, has received certain restriction.In the world, have only and few countries can be produced such tubing, and production technology is maintained secrecy.For example Germany and polytetrafluoroethyldispersion dispersion resin (PTFE) the heat resisting and pressure resisting thin-walled heat exchanger tube that the joint Aelfon company of the U.S. produces also do not have product of the same type at home.In fact; In producing polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube; Influence pipe diameter; Thickness is even, and overlength polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube quantity-produced key technology mainly is to lack strict control in traditional production process material prescription and the production process.In order to satisfy market demand, continuous, even, stable production overlength polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube must change existing material prescription and production technology.For this reason; The present invention has improved the material prescription and the production Technology of overlength polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube, thereby a kind of method of continuous, even, stable production overlength polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube is provided.
Summary of the invention
The objective of the invention is; Through improving material prescription and production Technology; Thereby produce major diameter (more than 20 millimeters), little wall thickness (below 1 millimeter), overlength polytetrafluoroethyldispersion dispersion resin (PTFE) the heat resisting and pressure resisting thin-walled heat exchanger tube of length, satisfied the specific (special) requirements in market above 40 meters.
The preparation method of overlength polytetrafluoroethyldispersion dispersion resin of the present invention (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube comprises that raw material mixes, and ageing is soaked into, and pre-molding is pushed moulding, oven dry de-oiling, high temperature sintering, technologies such as Quenching Treatment and finished product rolling.Wherein, in raw material very symphysis production. art, the present invention has improved raw material and has mixed preceding formula for raw stock.In view of spendable polytetrafluoroethylene (PTFE) has the multiple trade mark; The polytetrafluoroethylene (PTFE) of the different trades mark has different molecular weight distribution and characteristic, and the present invention is through screening, select to use molecular weight 2,300,000-5,000,000, particle diameter is at the dispersion resin of 0.2-0.4 micron; And be equipped with the proper auxiliary agent component; Constitute 2 yuan of blending ingredients, and, confirm different processes prescription and corresponding technological conditions to different purposes.The preparation method of overlength polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube is following:
1. raw material mixes: polytetrafluoroethyldispersion dispersion resin (PTFE)+solvent (No. 3 jet fuels of aviation) is abundant at low temperatures in proportion, evenly mixing, and agitator speed is lower than 10 rev/mins during mixing, mixes 5 minutes;
2. mixed raw material normal temperature is placed 24h, and temperature is between 14 ℃ to 40 ℃.
3. mixed raw material gets into mould and carries out precompressed, and prefabricating oil cylinder pressure is 5MPa, and 60 ℃ of precompressed temperature form the good cylindricality mould base of outward appearance;
4. mould base entering pushing machine pushes, and material cylinder temperature is 20-40 ℃, and pushing forms the long tube (20 millimeters of diameters, 2 millimeters of thickness) of 40 meters of length;
5. the tubing of pushing moulding is dried, and bake out temperature is 150 ℃, and the time is 1-2 minute;
6. the entering of the tubing after oven dry sintering furnace carries out high temperature sintering, and sintering temperature is at 300-400 ℃, and the time is 30-40 second;
7. the tubing behind the sintering carries out Quenching Treatment;
8. the tubing after the moulding carries out rolling on big disk track winder.
Compare with traditional handicraft, the solvent that mixed material prescription of the present invention uses is aviation jet fuel, is different from conventional solvent gasoline, has so both improved polytetrafluoroethyldispersion dispersion resin (PTFE) and solvent and mixability, has improved the stability of product again.Solvent composition in the mixed material prescription also changes with the kind of polytetrafluoroethyldispersion dispersion resin (PTFE).Secondly, can know that overlength polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube has adopted the method for pushing to make from above-mentioned production technology.For guaranteeing to obtain the light-wall pipe that certain-length is stablized and had to the diameter wall thickness; The present invention is in the production process of overlength polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube; Improved the control method of production line; Between speed of pushing and transfer rate, find optimal balance point,, thereby produce continous-stable and the large diameter thin wall pipe of certain-length is arranged by automatic controlling system.The automatic control system of using among the present invention has been widely used in the various industrial process, but this system is used for the manufacturing of overlength polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube, and key is to monitor suitable link.The sampling period of automatic control system was freely selected between 1 second at 5 seconds.The production of introducing tetrafluoroethene dispersion resin (PTFE) tubing that the present invention is successful with automatic control system has obtained good effect.
Equation to the control system:
X＝Ax+Bu，Y＝CX
X: state variable; A: state matrix; B: input matrix; U: input variable
Y: output variable; C: output matrix
C＝{100····0}
At this, suppose that X is the speed variable in the tubing pushing process, when some Xi changed, other variable also can be adjusted thereupon, and final system feeds back to the unified speed of an integral body.
The bright advantage of this law is, prepared a kind of overlength polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube and perfect its technology.The manufacturing that the binary mixture recipes is provided and automatic control system has been applied to overlength polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube; Not only obtained to have the extruded material of good heat resisting and pressure resisting performance; And processed length and reached 40 meters; 20 millimeters of diameters, the ground tubing that has good uniformity that wall thickness is 1 millimeter.Overlength polytetrafluoroethyldispersion dispersion resin (PTFE) the heat resisting and pressure resisting thin-walled heat exchanger tube thickness error of producing is that a kind of overlength polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube quantity-produced uses technology less than 10%.
The specific embodiment
In view of spendable polytetrafluoroethylene (PTFE) has the multiple trade mark; The polytetrafluoroethylene (PTFE) of the different trades mark has different molecular weight distribution and characteristic, and the present invention is through screening, select to use molecular weight 2,300,000-5,000,000, particle diameter is at the dispersion resin of 0.2-0.4 micron; And be equipped with the proper auxiliary agent component; Constitute 2 Yuans blending ingredients, and, confirm different processes prescription and corresponding technological conditions to different purposes.Main technique comprises: 1. raw material mixes, and 2. ageing is soaked into, and 3. pre-molding is 4. pushed moulding, 5. oven dry de-oiling, 6. high temperature sintering, 7. Quenching Treatment, 8. finished product rolling.Press process implementing below and make overlength polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube.
1. raw material mixes: polytetrafluoroethyldispersion dispersion resin (PTFE)+solvent (No. 3 jet fuels of aviation) is abundant at low temperatures in proportion, evenly mixing, and agitator speed is lower than 10 rev/mins during mixing, mixes 5 minutes;
2. mixed raw material normal temperature is placed 24h, and temperature is between 14 ℃ to 40 ℃.
3. mixed raw material gets into mould and carries out precompressed, and prefabricating oil cylinder pressure is 5MPa, and 60 ℃ of precompressed temperature form the good cylindricality mould base of outward appearance;
4. mould base entering pushing machine pushes, and material cylinder temperature is 20-40 ℃, and pushing forms the long tube (20 millimeters of diameters, 1 millimeter of thickness) of 40 meters of length;
5. the tubing of pushing moulding is dried, and bake out temperature is 150 ℃, and the time is 1-2 minute;
6. the entering of the tubing after oven dry sintering furnace carries out high temperature sintering, and sintering temperature is at 300-400 ℃, and the time is 30-40 second;
7. the tubing behind the sintering carries out Quenching Treatment;
8. the tubing after the moulding carries out rolling on big disk track winder.
In above-mentioned enforcement was made, overlength polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube adopted the method for pushing moulding to make.In order to obtain stay-in-grade tubing; Present embodiment disposes continuous online fast measuring tubing pushing speed, and between the speed in a plurality of stages of moulding, finds optimal balance point, by computer control; Bring great convenience to operating personnel, and guaranteed the stability of producing.
Claims (4)
1. the preparation method of an overlength polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube comprises that raw material mixes, and ageing is soaked into; Pre-molding; Push moulding, oven dry de-oiling, high temperature sintering; Technologies such as Quenching Treatment and finished product rolling is characterized in that the preparation method of overlength polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube:
A. raw material mixes: polytetrafluoroethyldispersion dispersion resin (PTFE)+solvent (No. 3 jet fuels of aviation) is abundant at low temperatures in proportion, evenly mixing, and agitator speed is lower than 10 rev/mins during mixing, mixes 5 minutes;
B. mixed raw material normal temperature is placed 24h, and temperature is between 14 ℃ to 40 ℃.
C. mixed raw material gets into mould and carries out precompressed, and prefabricating oil cylinder pressure is 5MPa, and 60 ℃ of precompressed temperature form the good cylindricality mould base of outward appearance;
D. mould base entering pushing machine pushes, and material cylinder temperature is 20-40 ℃, and pushing forms the long tube (20 millimeters of diameters, 1 millimeter of thickness) of 40 meters of length;
E. the tubing of pushing moulding is dried, and bake out temperature is 150 ℃, and the time is 1-2 minute;
F. the entering of the tubing after oven dry sintering furnace carries out high temperature sintering, and sintering temperature is at 300-400 ℃, and the time is 30-40 second;
G. the tubing behind the sintering carries out Quenching Treatment;
H. the tubing after the moulding carries out rolling on big disk track winder.
2. the preparation method of overlength polytetrafluoroethyldispersion dispersion resin according to claim 1 (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube; It is characterized in that the solvent that adopts is No. 3 jet fuels of aviation; Account for mix 10%-20% percentage by weight, set of dispense is than changing with the resin kind.
3. overlength polytetrafluoroethyldispersion dispersion resin according to claim 1 (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube is characterized in that the control of the method for pushing.
4. according to claim 1 or 3 described overlength polytetrafluoroethyldispersion dispersion resin (PTFE) heat resisting and pressure resisting thin-walled heat exchanger tube preparation methods, it is characterized in that coordinated type control system, push in the process each several part is monitored+FEEDBACK CONTROL.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103213270A (en) * | 2013-04-09 | 2013-07-24 | 天津市天塑科技集团有限公司技术中心 | Automatic production method of polytetrafluoroethylene (PTFE) dispersion resin |
| CN103753822A (en) * | 2014-01-23 | 2014-04-30 | 江阴市江南氟塑有限公司 | Method for producing multi-layer polytetrafluoroethylene tube through integrated forming |
| CN105522721A (en) * | 2016-02-01 | 2016-04-27 | 天津市天塑科技集团有限公司 | Preparation method of polytetrafluoroethylene heat-exchange tube |
| CN108928008A (en) * | 2018-07-06 | 2018-12-04 | 东莞市宇辰绝缘材料有限公司 | A kind of teflon rod technique |
| CN111844675A (en) * | 2020-08-03 | 2020-10-30 | 江阴市江南氟塑有限公司 | Extrusion preparation method of PTFE (Polytetrafluoroethylene) high-density paste extrusion pipe with caliber of more than 400 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1775847A (en) * | 2005-12-05 | 2006-05-24 | 浙江理工大学 | Method for preparing PTFE film material for air degerming |
| EP1741544A2 (en) * | 1997-02-03 | 2007-01-10 | Bard Peripheral Vascular, Inc. | Method of making expanded polytetrafluoroethylene products |
| CN101597379A (en) * | 2009-04-24 | 2009-12-09 | 曾燕飞 | The making method of the colored raw material band of winding and sintering tetrafluoroethylene |
| CN101696753A (en) * | 2009-10-29 | 2010-04-21 | 天津市天塑滨海氟塑料制品有限公司 | White polytetrafluoroethylene pipe with colored sign line and manufacture method thereof |
| CN101942163A (en) * | 2010-09-09 | 2011-01-12 | 宁波昌祺氟塑料制品有限公司 | Stirring method and device for PTEE powder |
| CN101962839A (en) * | 2010-09-10 | 2011-02-02 | 常州市兴诚高分子材料有限公司 | Process for producing polytetrafluoroethylene yarn for enhancing fabrics |
| US20120201988A1 (en) * | 2011-02-09 | 2012-08-09 | Phillips Scientific Inc. | Thin wall expandable polymer tubes having improved axial and radial strength, and a method of manufacturing thereof |
-
2012
- 2012-09-10 CN CN2012103306518A patent/CN102825792A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1741544A2 (en) * | 1997-02-03 | 2007-01-10 | Bard Peripheral Vascular, Inc. | Method of making expanded polytetrafluoroethylene products |
| CN1775847A (en) * | 2005-12-05 | 2006-05-24 | 浙江理工大学 | Method for preparing PTFE film material for air degerming |
| CN101597379A (en) * | 2009-04-24 | 2009-12-09 | 曾燕飞 | The making method of the colored raw material band of winding and sintering tetrafluoroethylene |
| CN101696753A (en) * | 2009-10-29 | 2010-04-21 | 天津市天塑滨海氟塑料制品有限公司 | White polytetrafluoroethylene pipe with colored sign line and manufacture method thereof |
| CN101942163A (en) * | 2010-09-09 | 2011-01-12 | 宁波昌祺氟塑料制品有限公司 | Stirring method and device for PTEE powder |
| CN101962839A (en) * | 2010-09-10 | 2011-02-02 | 常州市兴诚高分子材料有限公司 | Process for producing polytetrafluoroethylene yarn for enhancing fabrics |
| US20120201988A1 (en) * | 2011-02-09 | 2012-08-09 | Phillips Scientific Inc. | Thin wall expandable polymer tubes having improved axial and radial strength, and a method of manufacturing thereof |
Non-Patent Citations (3)
| Title |
|---|
| 周晓亮等: "《聚四氟乙烯同轴电缆推挤成型工艺及难点解析》", 《现代传输》 * |
| 徐下忠等: "《聚四氟乙烯主要成型制品及生产工艺》", 《塑料科技》 * |
| 赖成: "《聚四氟乙烯薄壁软管的连续推挤成型工艺探讨及分析》", 《航空材料》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103213270A (en) * | 2013-04-09 | 2013-07-24 | 天津市天塑科技集团有限公司技术中心 | Automatic production method of polytetrafluoroethylene (PTFE) dispersion resin |
| CN103753822A (en) * | 2014-01-23 | 2014-04-30 | 江阴市江南氟塑有限公司 | Method for producing multi-layer polytetrafluoroethylene tube through integrated forming |
| CN103753822B (en) * | 2014-01-23 | 2016-02-17 | 江阴市江南氟塑有限公司 | A kind of one-body molded production method of multilayer polytetrafluoroethylarticles pipe |
| CN105522721A (en) * | 2016-02-01 | 2016-04-27 | 天津市天塑科技集团有限公司 | Preparation method of polytetrafluoroethylene heat-exchange tube |
| CN108928008A (en) * | 2018-07-06 | 2018-12-04 | 东莞市宇辰绝缘材料有限公司 | A kind of teflon rod technique |
| CN111844675A (en) * | 2020-08-03 | 2020-10-30 | 江阴市江南氟塑有限公司 | Extrusion preparation method of PTFE (Polytetrafluoroethylene) high-density paste extrusion pipe with caliber of more than 400 |
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Application publication date: 20121219 |