CN108928008A - A kind of teflon rod technique - Google Patents
A kind of teflon rod technique Download PDFInfo
- Publication number
- CN108928008A CN108928008A CN201810738644.9A CN201810738644A CN108928008A CN 108928008 A CN108928008 A CN 108928008A CN 201810738644 A CN201810738644 A CN 201810738644A CN 108928008 A CN108928008 A CN 108928008A
- Authority
- CN
- China
- Prior art keywords
- sintering
- dry
- teflon rod
- temperature
- mixing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- 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
Abstract
The invention discloses a kind of teflon rod techniques, include the following steps: to mix: PTFE and extrusion aid being mixed by mixing machine, incorporation time is 10min-20min, and mixing temperature is no more than 19 DEG C, parks 24 hours or more under conditions of 25 DEG C -30 DEG C after mixing；It pushes: being pushed by upright push machine, at 30 DEG C -50 DEG C, die temperature is controlled at 50 DEG C -60 DEG C material chamber temperature control when pushing, is pushed rate and is become smaller with the increase of teflon rod diameter；It is dry: the material after pushing to be dried at 210 DEG C or less by dry and sintering furnace, drying time controls in 2h-3h；Sintering: after the completion of dry, dry and sintering furnace carries out indirect sintering, heating rate 60 DEG C/h, 375 DEG C of ± 5 DEG C of heat preservation 4h, then continuous sintering.The present invention simplifies production technology, realizes batch production, improves the production efficiency of teflon rod, solves existing polytetrafluoroethylene (PTFE) rod production process complexity, leads to the problem that production efficiency is low.
Description
Technical field
The present invention relates to technical field of plastic production, specially a kind of teflon rod technique.
Background technique
Teflon rod is made of polyflon, because anticorrosive height, is usually used in corrosive medium
Liner, sealing element and lubriation material of middle work etc., its use temperature is between -200 DEG C -260 DEG C.
Polytetrafluoroethylsteel steel bar has push rod and two kinds of moulded rod, and polytetrafluoroethylene (PTFE) has most excellent in known plastic
Resistance to chemical corrosion and dielectric properties can use at a temperature of -180 DEG C -+260 DEG C, and have minimum coefficient of friction, main
Be applicable in the product of some length and the machine components of nonstandard specification: seal/gasket, ring material, wearing plate/seat electricity, resist insulating part
Corrosivity industry, component of machine, lining, petroleum and natural gas, petrochemical industry, chemical industries, instrument and equipment manufacturer etc..
A kind of production method of polytetrafluoroethylene (PTFE) of the disclosure of the invention of Patent No. CN107699975A, including following step
It is rapid: A, with coupling agent treatment talcum powder, by polyethylene and treated talcum powder and polyimides, polyacrylamide, filling
Agent calcium carbonate, lubricant silica material are mixed；B, mixing material is granulated in dual-screw-stem machine, by master batch and poly- four
Fluoride blended progress melting extrusion spinning；C, medium temperature is carried out to spun filament to store 2-3 minutes, then carry out air-cooled 10-15 points
Clock, then liquid cooling is carried out after feeding back by high temperature, stretch processing is carried out after cooling, is carried out shaping after stretching by heating.It should
Invention is only applicable to polytetrafluoroethylene (PTFE) silk, can not produce teflon rod in batches, and existing teflon rod produces work
Skill is complicated, causes production efficiency low, for this purpose, it is proposed that a kind of teflon rod technique.
Summary of the invention
The purpose of the present invention is to provide a kind of teflon rod techniques, to solve mentioned above in the background art ask
Topic.
To achieve the above object, it the invention provides the following technical scheme: a kind of teflon rod technique, including walks as follows
It is rapid: (1) to mix: PTFE and extrusion aid being mixed by mixing machine, incorporation time 10min-20min, mixing temperature is not
More than 19 DEG C, parked 24 hours or more under conditions of 25 DEG C -30 DEG C after mixing；
(2) it pushes: being pushed by upright push machine, material chamber temperature control when pushing is at 30 DEG C -50 DEG C, die temperature control
System pushes rate and becomes smaller with the increase of teflon rod diameter at 50 DEG C -60 DEG C；
(3) dry: the material after pushing to be dried at 210 DEG C or less by dry and sintering furnace, drying time control exists
2h-3h；
(4) be sintered: after the completion of dry, dry and sintering furnace carries out indirect sintering, 60 DEG C/h of heating rate, 375 DEG C of ± 5 DEG C of heat preservations
4h, then continuous sintering；
(5) cooling: to obtain finished product through supercooling after the completion of sintering, cooling zone temperature is controlled at 300 DEG C or less.
Preferably, in the step (1) the formula number of teflon rod component are as follows: dispersion PTFE resin
100 parts, 18-24 parts of extrusion aid.
Preferably, the step (2) is needed before pushing through preforming mechanism embryo, compression speed 50mm/min,
Pressure is controlled in 0-3MPa.
Preferably, at 100 DEG C -250 DEG C, preheating zone temperature is controlled 250 the control of dry section temperature in the step (4)
DEG C -330 DEG C, sintering zone temperature is controlled at 380 DEG C -420 DEG C.
Preferably, the density domination of the teflon rod is in 2.10-2.30g/cm3, tensile strength is not less than
15MPa, elongation at break are not less than 150%.
Preferably, the partial size of the dispersion PTFE resin is 500 μm, and apparent density 0.45g/ml-0.55g/ml is helped crowded
No. 200 or No. 260 solvent naphthas are selected in agent.
Compared with prior art, the beneficial effects of the present invention are: the present invention by by polytetrafluoroethyldispersion dispersion resin normal
Pushed and be made as extrusion aid using organic solvent under temperature, then be made through drying, sintering, obtained teflon rod be 100% it is poly-
Tetrafluoroethene product, it is soft, it can arbitrarily bend, there is excellent resilience, packing can be replaced to use, be produced by simplifying
Technique realizes batch production, improves the production efficiency of teflon rod, solves existing teflon rod production work
Skill is complicated, leads to the problem that production efficiency is low.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
The present invention provides a kind of technical solution: a kind of teflon rod technique includes the following steps:
(1) it mixes: PTFE and extrusion aid being mixed by mixing machine, incorporation time 10min-20min, mixing temperature is not
More than 19 DEG C, parked 24 hours or more under conditions of 25 DEG C -30 DEG C after mixing；
(2) it pushes: being pushed by upright push machine, material chamber temperature control when pushing is at 30 DEG C -50 DEG C, die temperature control
System pushes rate and becomes smaller with the increase of teflon rod diameter at 50 DEG C -60 DEG C；
(3) dry: the material after pushing to be dried at 210 DEG C or less by dry and sintering furnace, drying time control exists
2h-3h；
(4) be sintered: after the completion of dry, dry and sintering furnace carries out indirect sintering, 60 DEG C/h of heating rate, 375 DEG C of ± 5 DEG C of heat preservations
4h, then continuous sintering；
(5) cooling: to obtain finished product through supercooling after the completion of sintering, cooling zone temperature is controlled at 300 DEG C or less.
Embodiment one:
PTFE and extrusion aid are mixed by mixing machine first, incorporation time 10min-20min, mixing temperature is no more than
It 19 DEG C, is parked 24 hours or more under conditions of 25 DEG C -30 DEG C after mixing；Then it is pushed by upright push machine,
At 30 DEG C -50 DEG C, die temperature is controlled at 50 DEG C -60 DEG C, pushes rate with polytetrafluoroethylene (PTFE) for material chamber temperature control when pushing
The increase of stick diameter and become smaller；Then the material after pushing is dried at 210 DEG C or less by dry and sintering furnace, it is dry
Time controls in 2h-3h；After the completion of drying, dry and sintering furnace carries out indirect sintering, heating rate 60 DEG C/h, and 375 DEG C ± 5 DEG C
Keep the temperature 4h, then continuous sintering；Finished product is obtained through supercooling after the completion of sintering, cooling zone temperature is controlled at 300 DEG C or less.
Embodiment two:
In example 1, following processes are added:
The component of the formula number of teflon rod in step (1) are as follows: 100 parts of dispersion PTFE resin, extrusion aid 18-
24 parts.
PTFE and extrusion aid are mixed by mixing machine first, incorporation time 10min-20min, mixing temperature is not
More than 19 DEG C, parked 24 hours or more under conditions of 25 DEG C -30 DEG C after mixing, wherein the formula of teflon rod is pressed
The component of parts by weight are as follows: 100 parts of dispersion PTFE resin, 18-24 parts of extrusion aid；Then it is pushed by upright push machine,
At 30 DEG C -50 DEG C, die temperature is controlled at 50 DEG C -60 DEG C, pushes rate with polytetrafluoroethylene (PTFE) for material chamber temperature control when pushing
The increase of stick diameter and become smaller；Then the material after pushing is dried at 210 DEG C or less by dry and sintering furnace, it is dry
Time controls in 2h-3h；After the completion of drying, dry and sintering furnace carries out indirect sintering, heating rate 60 DEG C/h, and 375 DEG C ± 5 DEG C
Keep the temperature 4h, then continuous sintering；Finished product is obtained through supercooling after the completion of sintering, cooling zone temperature is controlled at 300 DEG C or less.
Embodiment three:
In example 2, following processes are added:
Step (2) is needed before pushing through preforming mechanism embryo, compression speed 50mm/min, and pressure is controlled in 0-
3MPa。
PTFE and extrusion aid are mixed by mixing machine first, incorporation time 10min-20min, mixing temperature is not
More than 19 DEG C, parked 24 hours or more under conditions of 25 DEG C -30 DEG C after mixing, wherein the formula of teflon rod is pressed
The component of parts by weight are as follows: 100 parts of dispersion PTFE resin, 18-24 parts of extrusion aid；Then it is pushed by upright push machine,
At 30 DEG C -50 DEG C, die temperature is controlled at 50 DEG C -60 DEG C, pushes rate with polytetrafluoroethylene (PTFE) for material chamber temperature control when pushing
The increase of stick diameter and become smaller, needed before pushing through preforming mechanism embryo, compression speed 50mm/min, pressure control
In 0-3MPa；Then the material after pushing is dried at 210 DEG C or less by dry and sintering furnace, drying time control exists
2h-3h；After the completion of drying, dry and sintering furnace progress indirect sintering, heating rate 60 DEG C/h, 375 DEG C of ± 5 DEG C of heat preservation 4h, so
Continuous sintering afterwards；Finished product is obtained through supercooling after the completion of sintering, cooling zone temperature is controlled at 300 DEG C or less.
Example IV:
In the third embodiment, following processes are added:
The control of dry section temperature is at 100 DEG C -250 DEG C in step (4), and temperature control in preheating zone is at 250 DEG C -330 DEG C, sintering zone temperature
Degree control is at 380 DEG C -420 DEG C.
PTFE and extrusion aid are mixed by mixing machine first, incorporation time 10min-20min, mixing temperature is not
More than 19 DEG C, parked 24 hours or more under conditions of 25 DEG C -30 DEG C after mixing, wherein the formula of teflon rod is pressed
The component of parts by weight are as follows: 100 parts of dispersion PTFE resin, 18-24 parts of extrusion aid；Then it is pushed by upright push machine,
At 30 DEG C -50 DEG C, die temperature is controlled at 50 DEG C -60 DEG C, pushes rate with polytetrafluoroethylene (PTFE) for material chamber temperature control when pushing
The increase of stick diameter and become smaller, needed before pushing through preforming mechanism embryo, compression speed 50mm/min, pressure control
In 0-3MPa；Then the material after pushing is dried at 210 DEG C or less by dry and sintering furnace, drying time control exists
2h-3h；After the completion of drying, dry and sintering furnace progress indirect sintering, heating rate 60 DEG C/h, 375 DEG C of ± 5 DEG C of heat preservation 4h, so
Continuous sintering afterwards, the control of dry section temperature is at 100 DEG C -250 DEG C, and temperature control in preheating zone is at 250 DEG C -330 DEG C, sintering zone temperature
Control is at 380 DEG C -420 DEG C；Finished product is obtained through supercooling after the completion of sintering, cooling zone temperature is controlled at 300 DEG C or less.
Embodiment five:
In example IV, following processes are added:
The density domination of teflon rod is in 2.10-2.30g/cm3, for tensile strength not less than 15MPa, elongation at break is not small
In 150%.
PTFE and extrusion aid are mixed by mixing machine first, incorporation time 10min-20min, mixing temperature is not
More than 19 DEG C, parked 24 hours or more under conditions of 25 DEG C -30 DEG C after mixing, wherein the formula of teflon rod is pressed
The component of parts by weight are as follows: 100 parts of dispersion PTFE resin, 18-24 parts of extrusion aid；Then it is pushed by upright push machine,
At 30 DEG C -50 DEG C, die temperature is controlled at 50 DEG C -60 DEG C, pushes rate with polytetrafluoroethylene (PTFE) for material chamber temperature control when pushing
The increase of stick diameter and become smaller, needed before pushing through preforming mechanism embryo, compression speed 50mm/min, pressure control
In 0-3MPa；Then the material after pushing is dried at 210 DEG C or less by dry and sintering furnace, drying time control exists
2h-3h；After the completion of drying, dry and sintering furnace progress indirect sintering, heating rate 60 DEG C/h, 375 DEG C of ± 5 DEG C of heat preservation 4h, so
Continuous sintering afterwards, the control of dry section temperature is at 100 DEG C -250 DEG C, and temperature control in preheating zone is at 250 DEG C -330 DEG C, sintering zone temperature
Control is at 380 DEG C -420 DEG C；Finished product is obtained through supercooling after the completion of sintering, cooling zone temperature is controlled at 300 DEG C or less；Polytetrafluoro
The density domination of ethylene stick is in 2.10-2.30g/cm3, tensile strength is not less than 15MPa, and elongation at break is not less than 150%.
Embodiment six:
In embodiment five, following processes are added:
The partial size of dispersion PTFE resin be 500 μm, apparent density 0.45g/ml-0.55g/ml, extrusion aid select No. 200 or
No. 260 solvent naphthas.
PTFE and extrusion aid are mixed by mixing machine first, incorporation time 10min-20min, mixing temperature is not
More than 19 DEG C, parked 24 hours or more under conditions of 25 DEG C -30 DEG C after mixing, wherein the formula of teflon rod is pressed
The component of parts by weight are as follows: 100 parts of dispersion PTFE resin, 18-24 parts of extrusion aid；Then it is pushed by upright push machine,
At 30 DEG C -50 DEG C, die temperature is controlled at 50 DEG C -60 DEG C, pushes rate with polytetrafluoroethylene (PTFE) for material chamber temperature control when pushing
The increase of stick diameter and become smaller, needed before pushing through preforming mechanism embryo, compression speed 50mm/min, pressure control
In 0-3MPa；Then the material after pushing is dried at 210 DEG C or less by dry and sintering furnace, drying time control exists
2h-3h；After the completion of drying, dry and sintering furnace progress indirect sintering, heating rate 60 DEG C/h, 375 DEG C of ± 5 DEG C of heat preservation 4h, so
Continuous sintering afterwards, the control of dry section temperature is at 100 DEG C -250 DEG C, and temperature control in preheating zone is at 250 DEG C -330 DEG C, sintering zone temperature
Control is at 380 DEG C -420 DEG C；Finished product is obtained through supercooling after the completion of sintering, cooling zone temperature is controlled at 300 DEG C or less；Polytetrafluoro
The density domination of ethylene stick is in 2.10-2.30g/cm3, tensile strength is not less than 15MPa, and elongation at break is not less than 150%；Point
The partial size for dissipating PTFE resin is 500 μm, apparent density 0.45g/ml-0.55g/ml, and extrusion aid selection No. 200 or No. 260 is molten
Agent oil.
The present invention is made by pushing polytetrafluoroethyldispersion dispersion resin as extrusion aid using organic solvent at normal temperature, then is passed through
Dry, sintering is made, and the polytetrafluoroethylproducts products that obtained teflon rod is 100% are soft, can arbitrarily bend, and has
There is excellent resilience, packing can be replaced to use, by simplifying production technology, realizes batch production, improve polytetrafluoroethylene (PTFE)
The production efficiency of stick solves existing polytetrafluoroethylene (PTFE) rod production process complexity, leads to the problem that production efficiency is low.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of teflon rod technique, characterized by the following steps:
(1) it mixes: PTFE and extrusion aid being mixed by mixing machine, incorporation time 10min-20min, mixing temperature is not
More than 19 DEG C, parked 24 hours or more under conditions of 25 DEG C -30 DEG C after mixing；
(2) it pushes: being pushed by upright push machine, material chamber temperature control when pushing is at 30 DEG C -50 DEG C, die temperature control
System pushes rate and becomes smaller with the increase of teflon rod diameter at 50 DEG C -60 DEG C；
(3) dry: the material after pushing to be dried at 210 DEG C or less by dry and sintering furnace, drying time control exists
2h-3h；
(4) be sintered: after the completion of dry, dry and sintering furnace carries out indirect sintering, 60 DEG C/h of heating rate, 375 DEG C of ± 5 DEG C of heat preservations
4h, then continuous sintering；
(5) cooling: to obtain finished product through supercooling after the completion of sintering, cooling zone temperature is controlled at 300 DEG C or less.
2. a kind of teflon rod technique according to claim 1, it is characterised in that: polytetrafluoro in the step (1)
The component of the formula number of ethylene stick are as follows: 100 parts of dispersion PTFE resin, 18-24 parts of extrusion aid.
3. a kind of teflon rod technique according to claim 1, it is characterised in that: the step (2) is in pushing
Before need through preforming mechanism embryo, compression speed 50mm/min, pressure is controlled in 0-3MPa.
4. a kind of teflon rod technique according to claim 1, it is characterised in that: dry section in the step (4)
Temperature control is at 100 DEG C -250 DEG C, and at 250 DEG C -330 DEG C, sintering zone temperature is controlled at 380 DEG C -420 the control of preheating zone temperature
℃。
5. a kind of teflon rod technique according to claim 1, it is characterised in that: the teflon rod it is close
Degree control is in 2.10-2.30g/cm3, tensile strength is not less than 15MPa, and elongation at break is not less than 150%.
6. a kind of teflon rod technique according to claim 2, it is characterised in that: the grain of the dispersion PTFE resin
Diameter is 500 μm, apparent density 0.45g/ml-0.55g/ml, and extrusion aid selects No. 200 or No. 260 solvent naphthas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810738644.9A CN108928008A (en) | 2018-07-06 | 2018-07-06 | A kind of teflon rod technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810738644.9A CN108928008A (en) | 2018-07-06 | 2018-07-06 | A kind of teflon rod technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108928008A true CN108928008A (en) | 2018-12-04 |
Family
ID=64447824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810738644.9A Pending CN108928008A (en) | 2018-07-06 | 2018-07-06 | A kind of teflon rod technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108928008A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113480817A (en) * | 2021-06-11 | 2021-10-08 | 湖北宇辰新材料有限公司 | Preparation method of polytetrafluoroethylene rod |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2436308A1 (en) * | 2000-12-26 | 2002-07-04 | Boston Scientific Limited | Method of reducing the wall thickness of a ptfe tube and product formed thereby |
| CN102825792A (en) * | 2012-09-10 | 2012-12-19 | 天津市天塑科技集团有限公司技术中心 | Preparation method of ultralong thin-walled pressure- and heat-resistant polytetrafluoroethylene dispersion resin heat exchange tube |
| CN102276950B (en) * | 2011-05-18 | 2013-04-17 | 湖州松华橡塑有限公司 | Polytetrafluoroethylene (PTFE) composite material sealing ring with high temperature resistance and low creep, and preparation method thereof |
| CN107263884A (en) * | 2017-05-05 | 2017-10-20 | 江阴市江南氟塑有限公司 | A kind of super large caliber PTFE tube part paste extrusion preparation method and its extrusion equipment |
-
2018
- 2018-07-06 CN CN201810738644.9A patent/CN108928008A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2436308A1 (en) * | 2000-12-26 | 2002-07-04 | Boston Scientific Limited | Method of reducing the wall thickness of a ptfe tube and product formed thereby |
| CN102276950B (en) * | 2011-05-18 | 2013-04-17 | 湖州松华橡塑有限公司 | Polytetrafluoroethylene (PTFE) composite material sealing ring with high temperature resistance and low creep, and preparation method thereof |
| CN102825792A (en) * | 2012-09-10 | 2012-12-19 | 天津市天塑科技集团有限公司技术中心 | Preparation method of ultralong thin-walled pressure- and heat-resistant polytetrafluoroethylene dispersion resin heat exchange tube |
| CN107263884A (en) * | 2017-05-05 | 2017-10-20 | 江阴市江南氟塑有限公司 | A kind of super large caliber PTFE tube part paste extrusion preparation method and its extrusion equipment |
Non-Patent Citations (1)
| Title |
|---|
| 徐下忠: "聚四氟乙烯主要成型制品及生产工艺", 《塑料科技》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113480817A (en) * | 2021-06-11 | 2021-10-08 | 湖北宇辰新材料有限公司 | Preparation method of polytetrafluoroethylene rod |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR0121859B1 (en) | Process for processing elastomeric compositions | |
| CN102051703B (en) | Manufacturing method of film split polytetrafluoroethylene fibers | |
| EP3434703B1 (en) | Method for industrial production of trans-butadiene-isoprene copolymer rubber and apparatus therefor | |
| KR20010040930A (en) | Mixtures of thermoplastic fluoropolymers | |
| CN104086993B (en) | A kind of graft crosslinking polyamide liner tubing preparation method and high-temperature resistant inner lining oil pick-up tube | |
| CN108928008A (en) | A kind of teflon rod technique | |
| CN105385070A (en) | Wire and cable sheath processing technology based on nano calcium carbonate | |
| CN111442140A (en) | Nano-antibacterial PE water supply pipeline and manufacturing process thereof | |
| CN110790920A (en) | Semi-aromatic polyamide and polyamide molding composition composed of same | |
| CN107216584B (en) | A kind of fluororesin alloy and preparation method thereof | |
| CN106928600A (en) | The preparation method of the rubber-coated seal of polytetrafluoroethylene (PTFE) | |
| CN110295414A (en) | A kind of environment-friendly and energy-efficient rubber latex thread product and preparation method thereof | |
| CN107141392B (en) | Process for synthesizing chlorinated linear low-density polyethylene | |
| CN105965923A (en) | Processing process for polytetrafluoroethylene steel wire composite pipe | |
| CA1136087A (en) | Method for producing rubber articles | |
| CN102416694A (en) | Process method of rapid extrusion of vulcanized silicone rubber in continuous vulcanizing machine | |
| CN108908923A (en) | A kind of polyfluortetraethylene pipe technique | |
| CN110628169A (en) | Furan resin graphite tube and preparation method thereof | |
| CN110819105B (en) | Nylon composite material and preparation method and application thereof | |
| CN109810427A (en) | A kind of pvc material and preparation method thereof of high pressure resistant environment | |
| CN106632745A (en) | Chlorinated polyethylene CPE special for automobile oil-resistant rubber tube and production process thereof | |
| CN109867866A (en) | A kind of anti-aging corrosion proof cable material and preparation method thereof | |
| US2573707A (en) | Methods of processing sulfur-vulcanizable elastomer compounds | |
| CN115926319A (en) | Impact-resistant Krah pipe and processing technology thereof | |
| CN105542364B (en) | A kind of environment-protection nano-high molecule material and its preparation method and application |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181204 |
|
| RJ01 | Rejection of invention patent application after publication |