CN109458498A - A kind of high intensity PTFE multiple tube and preparation method thereof - Google Patents
A kind of high intensity PTFE multiple tube and preparation method thereof Download PDFInfo
- Publication number
- CN109458498A CN109458498A CN201811591938.XA CN201811591938A CN109458498A CN 109458498 A CN109458498 A CN 109458498A CN 201811591938 A CN201811591938 A CN 201811591938A CN 109458498 A CN109458498 A CN 109458498A
- Authority
- CN
- China
- Prior art keywords
- ptfe
- tube
- inorfil
- net
- inner tube
- 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.)
- Granted
Links
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 207
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 207
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000000835 fiber Substances 0.000 claims abstract description 45
- 238000005245 sintering Methods 0.000 claims abstract description 32
- 238000009954 braiding Methods 0.000 claims abstract description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000011521 glass Substances 0.000 claims abstract description 16
- 229920002748 Basalt fiber Polymers 0.000 claims abstract description 15
- 239000003365 glass fiber Substances 0.000 claims abstract description 10
- 239000010451 perlite Substances 0.000 claims abstract description 10
- 235000019362 perlite Nutrition 0.000 claims abstract description 10
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 10
- 238000000465 moulding Methods 0.000 claims description 20
- 239000012752 auxiliary agent Substances 0.000 claims description 19
- 239000003921 oil Substances 0.000 claims description 19
- 150000001875 compounds Chemical class 0.000 claims description 16
- 239000003350 kerosene Substances 0.000 claims description 16
- 238000004513 sizing Methods 0.000 claims description 16
- 229920006361 Polyflon Polymers 0.000 claims description 14
- -1 polytetrafluoroethylene Polymers 0.000 claims description 13
- 238000004804 winding Methods 0.000 claims description 11
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 8
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 5
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 4
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical group CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 229910000077 silane Inorganic materials 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- YFVKHKCZBSGZPE-UHFFFAOYSA-N 1-(1,3-benzodioxol-5-yl)-2-(propylamino)propan-1-one Chemical compound CCCNC(C)C(=O)C1=CC=C2OCOC2=C1 YFVKHKCZBSGZPE-UHFFFAOYSA-N 0.000 claims 1
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 22
- 238000000034 method Methods 0.000 description 8
- 230000004048 modification Effects 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 239000002994 raw material Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 239000002131 composite material Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 230000004927 fusion Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000009941 weaving Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002618 waking effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000012784 inorganic fiber Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 229920000295 expanded polytetrafluoroethylene Polymers 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
- F16L9/127—Rigid pipes of plastics with or without reinforcement the walls consisting of a single layer
- F16L9/128—Reinforced pipes
-
- 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
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/02—Moulding by agglomerating
- B29C67/04—Sintering
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Civil Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Laminated Bodies (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The present invention provides a kind of high intensity PTFE multiple tubes, are wrapped in the inorfil net of the PTFE inner tube outer surface including PTFE inner tube, braiding and are compounded in the PTFE outer tube of the inorfil net surface；The inorfil net is obtained using inorfil in the braiding of the outer surface of the PTFE inner tube, sintering；The inorfil is one or more of glass fibre, extraordinary glass, basalt fibre, perlite fiber, high silica fiber and high silicon oxygen modified fibre；The diameter of the inorfil is 3.5~6 μm.The present invention forms net form mosaic texture using inorfil net between two layers of PTFE tube road, effectively enhance the anti-pressure ability and dimensional stability of PTFE tube wall material, PTFE multiple tube is significantly improved than the burst pressure of simple PTFE tube, is more suitable in high temperature, high pressure and certain strong corrosive environments.The present invention also provides a kind of preparation methods of high intensity PTFE multiple tube.
Description
Technical field
The invention belongs to building pipe technical field more particularly to a kind of high intensity } PTFE multiple tube and preparation method thereof.
Background technique
Pipeline transportation (Pipeline transport) is to use pipeline as a kind of long distance delivery liquid of means of transport
With the defeated mode of gas goods and materials, it is one kind specially from grown place to the means of transportation of market transfer oil, coal and chemical products, is
The special component part of line haul in consolidated delivery net.Pipeline transportation not only freight volume it is big, it is continuous, rapidly, economic, safety,
Reliably, steadily and small investment, land occupation less, expense it is low, and can realize automatic control.Except the length for being widely used in petroleum, natural gas
Distance transport is outer, can also transport ore, coal, building materials, chemicals and grain etc..Pipeline transportation can be saved in water transport or land transportation
Get worse section, shortens the haul-cycle time, reduces transportation cost, improves conevying efficiency.
It is multinomial that PTFE (polytetrafluoroethylene (PTFE)) pipe has extremely strong chemical stability, resistance to ag(e)ing, non-stickiness and noninflammability etc.
Advantage, relative to other pipeline materials, PTFE tube is suitable for conveying strong acid, highly basic and all kinds of corrosive mediums, under normal pressure state
Its use temperature range can achieve -180 DEG C~260 DEG C.In addition, PTFE coefficient of friction is small, there is self-lubricating function, Ke Yiji
The big transporting resistance for reducing pipeline medium.The above properties are the materials that other material pipelines can not replace, therefore PTFE tube
It is widely used in many fields such as petroleum, chemical industry, food, national defense industry, hard-core technology, medicine.But in practical applications, PTFE tube
The problems such as still remaining poor antiknock ability, poor dimensional stability meets the higher neck using pressure especially for some needs
Domain needs further to improve its pressure-resistant performance and tensile strength etc..
Summary of the invention
The purpose of the present invention is to provide a kind of high intensity PTFE multiple tube and preparation method thereof, the PTFE in the present invention is multiple
Closing pipe has preferable pressure-resistant performance and tensile strength.
The present invention provides a kind of high intensity PTFE multiple tube, including PTFE inner tube, braiding are wrapped in outside the PTFE inner tube
The inorfil net on surface and the PTFE outer tube for being compounded in the inorfil net surface；
The inorfil net is obtained using inorfil in the braiding of the outer surface of the PTFE inner tube, sintering；
The inorfil is glass fibre, extraordinary glass, basalt fibre, perlite fiber, high silica fiber and height
One or more of silicon oxygen modified fibre；
The diameter of the inorfil is 3.5~6 μm.
Preferably, the count of the inorfil net is 1~30/cm.
Preferably, the inorfil net with a thickness of 0.1~0.3mm.
Preferably, the general thickness of the high intensity PTFE multiple tube is 0.4~2.0mm.
The present invention provides a kind of preparation method of high intensity PTFE multiple tube, comprising the following steps:
A) inorfil winding is woven in the outer surface of PTFE inner tube, obtain being covered in the PTFE of inorfil net
Pipe；
The inorfil is glass fibre, extraordinary glass, basalt fibre, perlite fiber, high silica fiber and height
One or more of silicon oxygen modified fibre；
The diameter of the inorfil is 3.5~6 μm；
B PTFE outer tube successively) is subjected to nested compound, oil removing and burning with the PTFE inner tube for being covered with inorfil net
Form type, obtains high-intensitive PTFE multiple tube.
Preferably, the inorfil is by being pre-sintered processing and then in the PTFE inner tube surface weave；
The temperature of the pre-sintering is 300~600 DEG C；
The time of the pre-sintering is 5~20min.
Preferably, the PTFE inner tube and PTFE outer tube are prepared according to the following steps to obtain:
Polyflon and auxiliary agent are mixed, successively pre-molding, pushing forming and sintering sizing, obtains after standing
PTFE inner tube or PTFE outer tube.
Preferably, the auxiliary agent includes aviation kerosine and silane coupling agent；
The mass ratio of the aviation kerosine and polytetrafluoroethylene (PTFE) is (15~35): 1；
The mass ratio of the silane coupling agent and polytetrafluoroethylene (PTFE) is (0.1~1.5): 100.
Preferably, the aviation kerosine is high-flash aviation kerosine；
The silane coupling agent is vinyltrimethoxysilane, vinyltriethoxysilane, γ-glycidyl ether oxygen
One or more of propyl trimethoxy silicane, gamma-aminopropyl-triethoxy-silane.
Preferably, the step B) in sinter molding temperature be 325~355 DEG C；
The step B) in sinter molding time be 5~30min.
The present invention provides a kind of high intensity PTFE multiple tubes, including PTFE inner tube, braiding to be wrapped in the PTFE inner tube
The inorfil net of outer surface and the PTFE outer tube for being compounded in the inorfil net surface；The inorfil net is using inorganic
Fiber is obtained in the braiding of the outer surface of the PTFE inner tube, sintering；The inorfil is glass fibre, extraordinary glass, the Black Warrior
One or more of rock fiber, perlite fiber, high silica fiber and high silicon oxygen modified fibre；The diameter of the inorfil
It is 3.5~6 μm.Wherein, the material of PTFE tube road internal layer and PTFE tube road outer layer is polytetrafluoroethylene (PTFE), the enhancing of inorfil net
Layer is the sandwich layer of multiple tube, is made of inorfil by special weaving, between the internal layer and outer layer in PTFE tube road
A kind of close nested composite construction formed.The present invention using inorfil net Jing Guo special pre-treatment in PTFE tube road,
Net form mosaic texture is formed between outer layer, effectively enhances the anti-pressure ability and dimensional stability of PTFE tube wall material, it is described
PTFE multiple tube is significantly improved than the burst pressure of simple PTFE tube, make the multiple tube be more suitable for high temperature, high pressure and
In certain strong corrosive environments.The experimental results showed that the pressure-resistant 8.3MPa of the multiple tube of the outer diameter 6mm in the present invention, pressure-resistant performance
Improve 180%；Molding shrinkage is 3%, and tensile strength is 25~50MPa, and heat distortion temperature is 150 DEG C, and bending modulus is
5400~9000MPa.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the side structure schematic view of high intensity PTFE multiple tube in the present invention；
Fig. 2 is the cross section structure schematic diagram of high intensity PTFE multiple tube in the present invention；
Wherein, 1 is PTFE outer tube, and 2 be inorfil net, and 3 be PTFE inner tube.
Specific embodiment
The present invention provides a kind of high intensity PTFE multiple tubes, including PTFE inner tube, braiding to be wrapped in the PTFE inner tube
The inorfil net of outer surface and the PTFE outer tube for being compounded in the inorfil net surface；
The inorfil net woven using inorfil in the outer surface PTFE, is sintered and is obtained；
The inorfil is glass fibre, extraordinary glass, basalt fibre, perlite fiber, high silica fiber and height
One or more of silicon oxygen modified fibre；
The diameter of the inorfil is 3.5~6 μm.
High-intensitive PTFE multiple tube in the present invention is made of three layers of nested composite construction, is followed successively by PTFE inner tube, inorganic
Web and PTFE outer tube, the inorfil net are the enhancing sandwich layer of multiple tube.
In the present invention, the material of the PTFE inner tube is polytetrafluoroethylene (PTFE), and the thickness of the PTFE inner tube is preferably 0.2
~0.5mm, specifically, in an embodiment of the present invention, can be 0.25mm, 0.3mm or 0.4mm.The present invention is to the PTFE
The tube outer diameter of inner tube does not have special limitation.
In the present invention, the material of the PTFE outer tube is polytetrafluoroethylene (PTFE), and the thickness of the PTFE outer tube is preferably 0.2
~0.5mm, specifically, in an embodiment of the present invention, can be 0.25mm, 0.3mm or 0.4mm.Preferably, outside the PTFE
The consistency of thickness of pipe and the PTFE inner tube.The present invention does not have special limitation, energy to the internal diameter and outer diameter of the PTFE outer tube
It is enough to match with said inner tube and inorfil net, form good nested composite construction.
In the present invention, inorfil net winding is woven on the outer surface of the PTFE inner tube, and with it is described
The inner wall of PTFE outer tube is compound, forms three layers of nested composite construction.
The inorfil net weaves by inorfil in the outer surface PTFE, is sintered and obtains, and the inorfil is excellent
One be selected as in glass fibre, extraordinary glass, basalt fibre, perlite fiber, high silica fiber and high silicon oxygen modified fibre
Kind is several；The diameter of the fiber is preferably 3.5~6 μm, that is, is preferably woven using monofilament fine count fiber, the present invention
It is woven it is preferred that using interlacing, in length and breadth open weave or being wound along pipe wall screw shape, more preferably uses interlacing；The volume
The density knitted is preferably 1~30/cm, more preferably 5~25/cm, specifically, in an embodiment of the present invention, can be 6
Root/cm, 10/cm or 20/cm.The angle of weave of the inorfil is preferably 30~60 °, and more preferably 45 °.
The thickness of the inorfil net is preferably 0.1~3mm, more preferably 0.1~2mm, most preferably 0.2~1mm,
Specifically, in an embodiment of the present invention, can be 0.1mm or 0.2mm.
In the present invention, the general thickness of the high intensity PTFE multiple tube is preferably 0.4~2.0mm, and more preferably 0.6
~1.0mm, specifically, in an embodiment of the present invention, can be 0.6mm, 0.8mm or 1.0mm.
The present invention also provides a kind of preparation methods of high intensity PTFE multiple tube, comprising the following steps:
A) inorfil winding is woven in the outer surface of PTFE inner tube, obtain being covered in the PTFE of inorfil net
Pipe；
The inorfil is glass fibre, extraordinary glass, basalt fibre, perlite fiber, high silica fiber and height
One or more of silicon oxygen modified fibre；
The diameter of the inorfil is 3.5~6 μm；
B PTFE outer tube successively) is subjected to nested compound, oil removing and burning with the PTFE inner tube for being covered with inorfil net
Form type, obtains high-intensitive PTFE multiple tube.
The present invention is preferably first prepared according to the following steps to obtain PTFE inner tube,
Polyflon and auxiliary agent are mixed, successively pre-molding, pushing forming and sinter molding after standing obtain
PTFE inner tube.
In the present invention, the auxiliary agent preferably includes aviation kerosine and silane coupling agent, and the aviation kerosine is preferably height
The mass ratio of flash-point aviation kerosine, the aviation kerosine and the polyflon is preferably (15~35): 100, it is more excellent
It is selected as (20~30): 100, most preferably (25~30): 100；
The silane coupling agent is preferably vinyltrimethoxysilane, vinyltriethoxysilane, γ-glycidol
One or more of ether oxygen propyl trimethoxy silicane, gamma-aminopropyl-triethoxy-silane；The silane coupling agent with it is described
The mass ratio of polyflon is preferably (0.1~1.5): 100, more preferably (0.5~1): 100.
In the present invention, the addition of the auxiliary agent be more advantageous to promote PTFE inner tube and PTFE outer tube and inorfil net it
Between combination.
The present invention mixes the polyflon with auxiliary agent, the double action rotated by blender and container,
It realizes being uniformly distributed for polyflon and auxiliary agent, is conducive to subsequent processing；
After completing the mixing, the present invention carries out obtained mixture to stand awake material, to promote polytetrafluoroethylene (PTFE) raw material
With the fusion of auxiliary agent.The temperature of the standing is preferably a certain steady temperature between 22~26 DEG C, more preferably 25 ± 1 DEG C；
The time of the standing is preferably 8~16 hours, and more preferably 10~15 hours.
After the completion of standing, the mixture after standing is carried out pre-molding by the present invention, and the pressure of the pre-molding is preferred
For 0.35~0.40MPa, present invention preferably employs preformers to carry out precompressed.
After precompressed is completed, the present invention squeezes out the material base of pre-molding by pushing, and is made in the uniform PTFE of structure
Pipe, the pressure of the pushing forming is preferably 0.40~0.45MPa；
After pushing forming, molded PTFE inner tube is sintered sizing by the present invention, obtains PTFE inner tube, the burning
The temperature of knot sizing is preferably 325~355 DEG C, and more preferably 330~340 DEG C；The time of the sintering sizing is preferably 10~
20min, specifically, in an embodiment of the present invention, can be 10min, 15min or 20min.
The preparation method of the PTFE outer tube is consistent with the preparation method of above-mentioned PTFE inner tube, adjusts different extrusion calibers
, details are not described herein by the present invention.
After obtaining PTFE inner tube and PTFE outer tube, inorfil winding is woven in the PTFE inner tube by the present invention
Outer surface, then compound, oil removing nested with the PTFE outer tube progress and sinter molding, obtain high-intensitive PTFE multiple tube.
The inorfil is preferably first carried out pre-sintering processing by the present invention, and the purpose is to remove the size of fiber surface
Residue guarantees inorfil braiding layer and PTFE tube is more preferable, stronger combination.The temperature of the pre-sintering is preferably 300
~600 DEG C, more preferably 300~450 DEG C, specifically, can be 300 DEG C, 400 DEG C or 450 DEG C in the embodiment of the present invention；
The time of the pre-sintering is preferably 5~30min, more preferably 8~12min.
In the present invention, the type of the inorfil, the weaving method of inorfil and count with it is described above
The type of inorfil, the weaving method of inorfil it is consistent with count, details are not described herein.
Nested recombination process in the present invention is to be combined together inner tube with outer tube by inhaling the operation of vacuum, described true
Reciprocal of duty cycle is preferably -0.01~-0.04MPa.
Multiple tube after nesting is compound is introduced into oil removing system and carries out oil removing, removing auxiliary agent oil, the work of the oil removing
The degreasing technique that skill is known to the skilled person, details are not described herein.
Sizing is sintered to multiple tube after oil removing, in the present invention, the temperature of the sintering sizing is preferably 325~
355 DEG C, more preferably 330~340 DEG C, specifically, in an embodiment of the present invention, can be 330 DEG C, 340 DEG C or 355 DEG C；
The time of the sintering sizing is preferably 5~30min, more preferably 9~12min.
The present invention provides a kind of high intensity PTFE multiple tubes, including PTFE inner tube, braiding to be wrapped in the PTFE inner tube
The inorfil net of outer surface and the PTFE outer tube for being compounded in the inorfil net surface；The inorfil net is using inorganic
Fiber weaves in the outer surface PTFE, is sintered and obtains；The inorfil be glass fibre, extraordinary glass, basalt fibre,
One or more of perlite fiber, high silica fiber and high silicon oxygen modified fibre；The diameter of the inorfil be 3.5~
6μm.Wherein, the material of PTFE tube road internal layer and PTFE tube road outer layer is polytetrafluoroethylene (PTFE), and inorfil net enhancement layer is multiple
The sandwich layer for closing pipe is made by special weaving of inorfil, is formed between the internal layer and outer layer in PTFE tube road
A kind of close nested composite construction.The present invention using Jing Guo special pre-treatment inorfil net the inside and outside layer in PTFE tube road it
Between formed net form mosaic texture, effectively enhance the anti-pressure ability and dimensional stability of PTFE tube wall material, the PTFE is compound
Pipe is significantly improved than the burst pressure of simple PTFE tube, and the multiple tube is made to be more suitable for high temperature, high pressure and certain strong corruption
It loses in environment.The experimental results showed that the pressure-resistant 8.3MPa of the multiple tube of the outer diameter 6mm in the present invention, pressure-resistant performance improve
180%；Molding shrinkage is 3%, tensile strength be 25~50MPa, heat distortion temperature be 150 DEG C, bending modulus be 5400~
9000MPa。
In order to further illustrate the present invention, with reference to embodiments to a kind of high intensity PTFE multiple tube provided by the invention
And preparation method thereof be described in detail, but limiting the scope of the present invention cannot be understood as.
Embodiment 1
By 1000g polyflon, 150g aviation kerosine and 1g vinyltrimethoxysilane, by blender and
Container rotation double action, realization polyflon and auxiliary agent are uniformly distributed, in favor of following process.After evenly mixing
Raw material stand 12 hours under 25 ± 1 DEG C of steady temperature, promote polytetrafluoroethylene (PTFE) raw material and auxiliary agent fusion.
Premix is put into preformer and is suppressed after standing and waking up material, and preferably pressure value is 0.35MPa, system
At material base.
The material base of pre-molding is introduced into pushing machine, and by pushing extrusion molding under the pressure of 0.40MPa, structure is made
Uniformly, the internal layer PTFE tube of wall thickness 0.25mm.
Internal layer PTFE tube is sent into sintering machine, is sintered sizing, sintering time 20min at 330 DEG C ± 2 DEG C.
The pre-sintering at 300 DEG C of fine-denier special type glass is handled, and removes the size residue of fiber surface.Pass through tricot machine
Sinter molding internal layer PTFE tube surface weave wind fine-denier special type glass, 10 piece/centimetre of count, 45 ° of angle of weave,
Thickness 0.1mm is wound, guarantees fine-denier special type glass braiding layer during braiding and PTFE tube is more preferable, stronger combination.
Outer layer PTFE tube successively passes through production process identical as internal layer PTFE tube, and the outer layer PTFE of wall thickness 0.25mm is made
Pipe.The internal layer PTFE tube of surface weave winding fine-denier special type glass and the progress of outer layer PTFE tube are nested compound, by Compound Machining
PTFE multiple tube afterwards introduces oil removing system removing auxiliary agent oil, sintering machine is entered after oil removing, it is fixed to be sintered at a temperature of 330 ± 2 DEG C
Type.By nested Compound Machining and sintering sizing, make internal layer PTFE tube, fine-denier special type glass winding braiding layer and outer layer PTFE tube
It is closely linked, high-strength special type glass/PTFE multiple tube of wall thickness 0.6mm is made.It finally wound, examined and is wrapped
It is packed into library.
PTFE multiple tube pressure resistance performance obtained in embodiment 1 is as shown in table 1,
The pressure-resistant performance of PTFE multiple tube obtained in 1 embodiment 1 of table
Embodiment 2
By 1000g polyflon, 280g aviation kerosine and 6g vinyltriethoxysilane, by blender and
Container rotation double action, realization polyflon and auxiliary agent are uniformly distributed, in favor of following process.After evenly mixing
Raw material stand 16 hours under 22 ± 1 DEG C of steady temperature, promote polytetrafluoroethylene (PTFE) raw material and auxiliary agent fusion.
Premix puts into preformer and is pressed into material base under 0.38MPa pressure after standing and waking up material.
The material base of pre-molding is introduced into pushing machine, and by pushing extrusion molding under the pressure of 0.43MPa, structure is made
Uniformly, the internal layer PTFE tube of wall thickness 0.3mm.
Internal layer PTFE tube is sent into sintering machine, is sintered sizing, sintering time 15min at 340 DEG C ± 2 DEG C.
The pre-sintering at 400 DEG C of fine-denier basalt fibre is handled, and removes the size residue of fiber surface.Pass through warp knit
Machine winds fine-denier basalt fibre, 6 piece/centimetre of count, angle of weave in the internal layer PTFE tube surface weave of sinter molding
45 °, thickness 0.2mm, guarantees fine-denier basalt fibre braiding layer during braiding and PTFE tube is more preferable, stronger combination.
Outer layer PTFE tube successively passes through production process identical as internal layer PTFE tube, and the outer layer PTFE tube of wall thickness 0.3mm is made.
The internal layer PTFE tube of surface weave winding fine-denier basalt fibre and the progress of outer layer PTFE tube are nested compound, after Compound Machining
PTFE multiple tube introduce oil removing system removing auxiliary agent oil, after oil removing enter sintering machine, at a temperature of 340 ± 2 DEG C be sintered sizing.
By nested Compound Machining and sintering sizing, make internal layer PTFE tube, fine-denier basalt fibre winding braiding layer and outer layer PTFE tube
It is closely linked, high-strength basalt fiber/PTFE multiple tube of wall thickness 0.8mm is made.Finally wound, examine and
It is packed and stored.
PTFE multiple tube pressure resistance performance obtained in embodiment 2 is as shown in table 2,
The pressure-resistant performance of PTFE multiple tube obtained in 2 embodiment 2 of table
Embodiment 3
By γ-glycidyl ether oxygen propyl trimethoxy of 1000g polyflon, 350g aviation kerosine and 10g
Silane rotates double action by blender and container, being uniformly distributed for polyflon and auxiliary agent is realized, in favor of rear
Continuous processing.Raw material after evenly mixing stands 8 hours under 26 ± 1 DEG C of steady temperature, promotes polytetrafluoroethylene (PTFE) raw material and helps
The fusion of agent.
Premix puts into preformer and is pressed into material base under 0.4MPa pressure after standing and waking up material.
The material base of pre-molding is introduced into pushing machine, and by pushing extrusion molding under the pressure of 0.45MPa, structure is made
Uniformly, the internal layer PTFE tube of wall thickness 0.4mm.
Internal layer PTFE tube is sent into sintering machine, is sintered sizing, sintering time 10min at 355 DEG C ± 2 DEG C.
The pre-sintering at 450 DEG C of high silicon oxygen (modification) fiber of fine-denier is handled, and removes the size residue of fiber surface.It is logical
Cross tricot machine sinter molding internal layer PTFE tube surface weave wind high silicon oxygen (modification) fiber of fine-denier, count 20/
Centimetre, 45 ° of angle of weave, thickness 0.2mm, guarantee high silicon oxygen (modification) fiber braiding layer of fine-denier and PTFE tube more during braiding
Good, stronger combination.
Outer layer PTFE tube successively passes through production process identical as internal layer PTFE tube, and the outer layer PTFE tube of wall thickness 0.4mm is made.
The internal layer PTFE tube of surface weave winding high silicon oxygen (modification) fiber of fine-denier and the progress of outer layer PTFE tube are nested compound, and process is compound
PTFE multiple tube after processing introduces oil removing system removing auxiliary agent oil, and sintering machine is entered after oil removing, is burnt at a temperature of 355 ± 2 DEG C
Knot sizing.By nested Compound Machining and sintering sizing, make high silicon oxygen (modification) the fiber winding braiding layer of internal layer PTFE tube, fine-denier
It is closely linked with outer layer PTFE tube, high silicon oxygen (modification) fiber/PTFE multiple tube of high intensity of wall thickness 1mm is made.Most
After wound, examined and be packed and stored.
PTFE multiple tube pressure resistance performance obtained in embodiment 3 is as shown in table 3,
The pressure-resistant performance of PTFE multiple tube obtained in 3 embodiment 3 of table
Comparative example 1
PTFE multiple tube is prepared according to the preparation method in embodiment 1, unlike, PTFE inner tube in this comparative example
Polyflon is only used in the raw material of PTFE outer tube, does not use aviation kerosine and silane coupled agent aid.
Obtained PTFE composite pipe pressure resistance performance is as shown in table 4.
The pressure-resistant performance of PTFE multiple tube obtained in 4 comparative example 1 of table
Comparative example 2
PTFE multiple tube is prepared according to the preparation method in embodiment 1, unlike, the inorganic fibre in this comparative example
Dimension is directly used in braiding inorfil net without being pre-sintered.
Obtained PTFE composite pipe pressure resistance performance is as shown in table 5.
The pressure-resistant performance of PTFE multiple tube obtained in 5 comparative example 2 of table
The performance comparison of PTFE multiple tube and pure PTFE tube in 6 embodiment 3 of table and comparative example 1~2
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of high intensity PTFE multiple tube is wrapped in the inorganic fibre of the PTFE inner tube outer surface including PTFE inner tube, braiding
Dimension net and the PTFE outer tube for being compounded in the inorfil net surface；
The inorfil net is obtained using inorfil in the braiding of the outer surface of the PTFE inner tube, sintering；
The inorfil is glass fibre, extraordinary glass, basalt fibre, perlite fiber, high silica fiber and high silicon oxygen
One or more of modified fibre；
The diameter of the inorfil is 3.5~6 μm.
2. high intensity PTFE multiple tube according to claim 1, which is characterized in that the count of the inorfil net
For 1~30/cm.
3. high intensity PTFE multiple tube according to claim 1, which is characterized in that the inorfil net with a thickness of
0.1~0.3mm.
4. high intensity PTFE multiple tube according to claim 3, which is characterized in that the high intensity PTFE multiple tube it is total
Body thickness is 0.4~2.0mm.
5. a kind of preparation method of high intensity PTFE multiple tube, comprising the following steps:
A) inorfil winding is woven in the outer surface of PTFE inner tube, obtain the PTFE inner tube for being covered with inorfil net；
The inorfil is glass fibre, extraordinary glass, basalt fibre, perlite fiber, high silica fiber and high silicon oxygen
One or more of modified fibre；
The diameter of the inorfil is 3.5~6 μm；
B PTFE outer tube successively) is subjected to nested compound, oil removing with the PTFE inner tube for being covered with inorfil net and is sintered into
Type obtains high-intensitive PTFE multiple tube.
6. preparation method according to claim 5, which is characterized in that after the inorfil is handled by pre-sintering,
Again in the PTFE inner tube surface weave；
The temperature of the pre-sintering is 300~600 DEG C；
The time of the pre-sintering is 5~20min.
7. preparation method according to claim 5, which is characterized in that the PTFE inner tube and PTFE outer tube are according to following
Step is prepared:
Polyflon and auxiliary agent are mixed, successively pre-molding, pushing forming and sintering sizing, obtains PTFE after standing
Inner tube or PTFE outer tube.
8. preparation method according to claim 7, which is characterized in that the auxiliary agent includes aviation kerosine and silane coupled
Agent；
The mass ratio of the aviation kerosine and polytetrafluoroethylene (PTFE) is (15~35): 100；
The mass ratio of the silane coupling agent and polytetrafluoroethylene (PTFE) is (0.1~1.5): 100.
9. preparation method according to claim 8, which is characterized in that the aviation kerosine is high-flash aviation kerosine；
The silane coupling agent is vinyltrimethoxysilane, vinyltriethoxysilane, γ-glycidyl ether oxygen propyl
One or more of trimethoxy silane, gamma-aminopropyl-triethoxy-silane.
10. preparation method according to claim 5, which is characterized in that the step B) in sinter molding temperature be 325
~355 DEG C；
The step B) in sinter molding time be 5~30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811591938.XA CN109458498B (en) | 2018-12-25 | 2018-12-25 | High-strength PTFE composite pipe and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811591938.XA CN109458498B (en) | 2018-12-25 | 2018-12-25 | High-strength PTFE composite pipe and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109458498A true CN109458498A (en) | 2019-03-12 |
| CN109458498B CN109458498B (en) | 2024-02-27 |
Family
ID=65614585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811591938.XA Active CN109458498B (en) | 2018-12-25 | 2018-12-25 | High-strength PTFE composite pipe and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109458498B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110985771A (en) * | 2019-12-26 | 2020-04-10 | 衡水瑞纤新材料科技有限公司 | Basalt fiber reinforced composite pipe |
| CN112880460A (en) * | 2021-01-08 | 2021-06-01 | 宋朋泽 | PTFE double-layer composite pipe, preparation method thereof and heat exchanger |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202185222U (en) * | 2011-07-19 | 2012-04-11 | 宋朋泽 | Basalt fiber composite filter material |
| CN103016856A (en) * | 2012-11-30 | 2013-04-03 | 浙江伟星新型建材股份有限公司 | Fiber mesh tape-wound and reinforced composite pipe, preparation process and device |
| CN203329504U (en) * | 2013-04-23 | 2013-12-11 | 宋朋泽 | Ultrahigh-temperature filter material |
| 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 |
| CN103785224A (en) * | 2014-02-14 | 2014-05-14 | 营口市洪源玻纤科技有限公司 | Glass fiber and PTFE (Polytetrafluoroethylene) fiber blended filter material and preparation method thereof |
| CN104534187A (en) * | 2014-12-23 | 2015-04-22 | 泉州泉港华博化工科技有限公司 | Fiber reinforced thermoplastic compound pipeline and manufacturing technology thereof |
| CN105423003A (en) * | 2015-12-11 | 2016-03-23 | 上海金由氟材料股份有限公司 | Polyfluoroalkoxy pipe and preparation method thereof |
| CN106139918A (en) * | 2015-04-16 | 2016-11-23 | 青岛远东富隆新材料有限公司 | A kind of production method of polytetrafluoroethylhollow hollow fiber pipe |
| CN106243696A (en) * | 2016-07-29 | 2016-12-21 | 佛山市高明区诚睿基科技有限公司 | A kind of high-performance composite glass fiber strengthens resin material and preparation method thereof |
| CN206001129U (en) * | 2016-08-19 | 2017-03-08 | 四川航天五源复合材料有限公司 | A kind of basalt fibre air-conditioning copper pipe |
| CN106823561A (en) * | 2017-02-27 | 2017-06-13 | 辽宁鸿盛环境技术集团有限公司 | A kind of inorfil is combined woven filtrate and preparation method with organic fiber |
| CN107189428A (en) * | 2017-07-12 | 2017-09-22 | 长沙五犇新材料科技有限公司 | Graphene/carbon fiber reinforced nylon composite abrasion resistance material and preparation method and application |
| CN107245174A (en) * | 2017-05-26 | 2017-10-13 | 贵州利智管道科技有限公司 | A kind of PE compound pipeline complex pipelines and preparation method thereof |
| CN107418045A (en) * | 2017-04-27 | 2017-12-01 | 宁波海雨新材料科技有限公司 | A kind of high intensity high rigidity graphene modified polypropene and preparation method thereof |
| CN108144456A (en) * | 2016-12-02 | 2018-06-12 | 中国科学院大连化学物理研究所 | A kind of preparation of polytetrafluoroethylhollow hollow fiber membrane and film and membrane contactor and application |
| CN108443597A (en) * | 2018-04-27 | 2018-08-24 | 施柏山 | A kind of basalt fibre hybrid composite manner pipe and preparation method thereof |
-
2018
- 2018-12-25 CN CN201811591938.XA patent/CN109458498B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202185222U (en) * | 2011-07-19 | 2012-04-11 | 宋朋泽 | Basalt fiber composite filter material |
| CN103016856A (en) * | 2012-11-30 | 2013-04-03 | 浙江伟星新型建材股份有限公司 | Fiber mesh tape-wound and reinforced composite pipe, preparation process and device |
| CN203329504U (en) * | 2013-04-23 | 2013-12-11 | 宋朋泽 | Ultrahigh-temperature filter material |
| 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 |
| CN103785224A (en) * | 2014-02-14 | 2014-05-14 | 营口市洪源玻纤科技有限公司 | Glass fiber and PTFE (Polytetrafluoroethylene) fiber blended filter material and preparation method thereof |
| CN104534187A (en) * | 2014-12-23 | 2015-04-22 | 泉州泉港华博化工科技有限公司 | Fiber reinforced thermoplastic compound pipeline and manufacturing technology thereof |
| CN106139918A (en) * | 2015-04-16 | 2016-11-23 | 青岛远东富隆新材料有限公司 | A kind of production method of polytetrafluoroethylhollow hollow fiber pipe |
| CN105423003A (en) * | 2015-12-11 | 2016-03-23 | 上海金由氟材料股份有限公司 | Polyfluoroalkoxy pipe and preparation method thereof |
| CN106243696A (en) * | 2016-07-29 | 2016-12-21 | 佛山市高明区诚睿基科技有限公司 | A kind of high-performance composite glass fiber strengthens resin material and preparation method thereof |
| CN206001129U (en) * | 2016-08-19 | 2017-03-08 | 四川航天五源复合材料有限公司 | A kind of basalt fibre air-conditioning copper pipe |
| CN108144456A (en) * | 2016-12-02 | 2018-06-12 | 中国科学院大连化学物理研究所 | A kind of preparation of polytetrafluoroethylhollow hollow fiber membrane and film and membrane contactor and application |
| CN106823561A (en) * | 2017-02-27 | 2017-06-13 | 辽宁鸿盛环境技术集团有限公司 | A kind of inorfil is combined woven filtrate and preparation method with organic fiber |
| CN107418045A (en) * | 2017-04-27 | 2017-12-01 | 宁波海雨新材料科技有限公司 | A kind of high intensity high rigidity graphene modified polypropene and preparation method thereof |
| CN107245174A (en) * | 2017-05-26 | 2017-10-13 | 贵州利智管道科技有限公司 | A kind of PE compound pipeline complex pipelines and preparation method thereof |
| CN107189428A (en) * | 2017-07-12 | 2017-09-22 | 长沙五犇新材料科技有限公司 | Graphene/carbon fiber reinforced nylon composite abrasion resistance material and preparation method and application |
| CN108443597A (en) * | 2018-04-27 | 2018-08-24 | 施柏山 | A kind of basalt fibre hybrid composite manner pipe and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110985771A (en) * | 2019-12-26 | 2020-04-10 | 衡水瑞纤新材料科技有限公司 | Basalt fiber reinforced composite pipe |
| CN112880460A (en) * | 2021-01-08 | 2021-06-01 | 宋朋泽 | PTFE double-layer composite pipe, preparation method thereof and heat exchanger |
| CN112880460B (en) * | 2021-01-08 | 2023-09-22 | 宋朋泽 | PTFE double-layer composite tube, preparation method thereof and heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109458498B (en) | 2024-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109458498A (en) | A kind of high intensity PTFE multiple tube and preparation method thereof | |
| CN104086204B (en) | Heavy caliber long size carbon-carbon composite pipeline and preparation method thereof | |
| CN107405858A (en) | Evacuated insulation panel | |
| CN105508812A (en) | Vacuum thermal isolation plate and manufacturing method thereof | |
| CN108189518B (en) | Graphene electromagnetic shield cloth and its manufacturing method | |
| SI9110585B (en) | Vacuum insulation panel with asymetric structure | |
| CN109373060A (en) | A kind of high intensity PFA multiple tube and preparation method thereof | |
| US20110284116A1 (en) | High-temperature flexible composite hose | |
| CN105485514B (en) | LNG cold gas cylinder, storage tank, warehouse and defeated pipe | |
| CN205724730U (en) | A kind of high strength glass fiber reinforced plastics cable duct tube | |
| CN208295333U (en) | High tensile flexible pipe structure is exploited with offshore oil | |
| CN105840926B (en) | A kind of deep-sea oil gas engineering composite and flexible pipe and its manufacturing method | |
| CN204534113U (en) | The metal hydride hydrogen-storing device of flexible structure | |
| CN211418317U (en) | Glass fiber reinforced plastic storage tank with multi-layer heat preservation | |
| CN201158506Y (en) | Composite packaging pouch | |
| CN112880460B (en) | PTFE double-layer composite tube, preparation method thereof and heat exchanger | |
| CN112880461A (en) | PFA double-layer composite tube, preparation method thereof and heat exchanger | |
| CN105563950B (en) | It is a kind of to be applied to liquid gas storage, the ultralow temperature compound insulating material of transporting equipment | |
| CN105715944A (en) | Bottle interior heating method for LNG gas cylinder vacuum pumping | |
| CN2926128Y (en) | Band tubular conveyor rubber belt with reinforced layer | |
| CN105563945B (en) | Application of the Zirconium oxide fibre as low temperature, ultra-low temperature heat preservation material | |
| Lea et al. | CVI. Flow of water through a circular tube with a central core and through rectangular tubes | |
| CN212560034U (en) | Expanded explosive raw material heating device | |
| CN107827474B (en) | Rapid molding method for injection molding of high-solid-content low-viscosity slurry permeable ceramic matrix wave-transmitting composite material | |
| CN208948068U (en) | A kind of heat-insulated feed bin and its prefabricated component |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No. 8, Tashan Road, Kecheng District, Quzhou, Zhejiang Applicant after: Zhejiang Hongsheng New Material Technology Group Co.,Ltd. Address before: No.8, Tashan Road, Kecheng District, Quzhou City, Zhejiang Province Applicant before: ZHEJIANG HONGSHENG ENVIROTECH GROUP Co.,Ltd. |
|
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Song Pengze Inventor after: Li Gang Inventor before: Song Mingze Inventor before: Li Gang |
|
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No. 8, Guozhi Road, Quzhou City, Zhejiang Province 324000 Applicant after: Zhejiang Hongsheng New Material Technology Group Co.,Ltd. Address before: No. 8, Tashan Road, Kecheng District, Quzhou, Zhejiang Applicant before: Zhejiang Hongsheng New Material Technology Group Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |