CN104292485A - Preparation method of polytetrafluoroethylene membrane - Google Patents
Preparation method of polytetrafluoroethylene membrane Download PDFInfo
- Publication number
- CN104292485A CN104292485A CN201410503784.XA CN201410503784A CN104292485A CN 104292485 A CN104292485 A CN 104292485A CN 201410503784 A CN201410503784 A CN 201410503784A CN 104292485 A CN104292485 A CN 104292485A
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- polytetrafluoroethylene
- preparation
- degreasing
- sheet
- belt
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- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention discloses a preparation method of a polytetrafluoroethylene membrane. The preparation method comprises the following steps: firstly, mixing polytetrafluoroethylene resin and a alkane solvent to obtain a mixture; secondly, placing the mixture in a stainless steel container and then in an incubator for carrying out thermal preservation; thirdly, extruding the treated mixture in an extruder and calendaring to prepare a sheet-shaped polytetrafluoroethylene belt; fourthly, enabling the calendared sheet-shaped polytetrafluoroethylene belt to enter a degreasing oven for degreasing and volatilizing the solvent in the sheet-shaped polytetrafluoroethylene belt to obtain the degreased polytetrafluoroethylene belts and fifthly, enabling the degreased polytetrafluoroethylene belt in the step 4 to enter a width expander for drawing and then placing the tail end of the polytetrafluoroethylene belt in a high-temperature curing oven of which the temperature is 400 DEG C and sizing for 50 seconds so as to form the polytetrafluoroethylene membrane of which the thickness is 30 microns and the pore size is 0.6 micron. The product produced by the preparation method disclosed by the invention has stable performance and good gas permeability.
Description
Technical field
The invention belongs to the technical field of film preparation, relate to a kind of preparation method of poly tetrafluoroethylene.
Background technology
Poly tetrafluoroethylene be by suspension injecting tetrafluoroethylene resin through mold pressing, sinter, be cooled to blank, then through turning, calendering is made.The film be lathed is non-directional film, non-directional film through calendering after orientation film.Non-directional film rolling 1.1-1.8 is doubly semi-directional film.Polytetrafluoroethylene film is used for condenser dielectric, makes wire insulation, and electrical instrumentation insulate, seal liner.Polytetrafluoroethylene film divides tetrafluoroethylene colorful film, polytetrafluoroethylactivated activated film and F46 film.
Summary of the invention
The technical problem that the present invention solves is to provide a kind of preparation method of poly tetrafluoroethylene, and the product performance that preparation method of the present invention produces are stablized, and have good permeability.
To achieve these goals, the present invention realizes by the following technical solutions:
A preparation method for poly tetrafluoroethylene, comprises the steps:
Step one: teflon resin and alkane solvent are mixed at 6-10 ° of C temperature, obtains compound;
Step 2: the compound getting the preparation of described step one is placed in stainless steel vessel, puts into 80 ° of C thermostat containers and is incubated 12-20 hour;
Step 3: make the compound after described step 2 process insert extrusion machine and carry out extruding, rolling the sheet teflin tape making thickness 0.1-0.3 millimeter, width 200-500 millimeter;
Step 4: the sheet teflin tape after described step 3 calendering enters degreasing baking oven and carries out degreasing, and skimming temp is 250-300 ° of C, and it is 1 m/min that front end unreels speed, and rolling speed is 10 ms/min; Solvent evaporates in sheet tetrafluoroethylene base band is formed, obtains the teflin tape after degreasing;
Step 5: the teflin tape after described step 4 degreasing enters expander and stretches; Then the end of described expander cross directional stretch is placed hot setting baking oven, the temperature of hot setting baking oven is 400 ° of C, and shaping time was 50 seconds, forms thickness 30 microns, and aperture is at the poly tetrafluoroethylene of 0.6 micron.
Compared with prior art, the present invention has following beneficial effect:
(1) product performance that preparation method of the present invention produces are stablized, and have good permeability.
Embodiment
The technique means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
embodiment 1
A preparation method for poly tetrafluoroethylene, comprises the steps:
Step one: teflon resin and alkane solvent are mixed at 6-10 ° of C temperature, obtains compound;
Step 2: the compound getting the preparation of described step one is placed in stainless steel vessel, puts into 80 ° of C thermostat containers and is incubated 12-20 hour;
Step 3: make the compound after described step 2 process insert extrusion machine and carry out extruding, rolling the sheet teflin tape making thickness 0.1-0.3 millimeter, width 200-500 millimeter;
Step 4: the sheet teflin tape after described step 3 calendering enters degreasing baking oven and carries out degreasing, and skimming temp is 250-300 ° of C, and it is 1 m/min that front end unreels speed, and rolling speed is 10 ms/min; Solvent evaporates in sheet tetrafluoroethylene base band is formed, obtains the teflin tape after degreasing;
Step 5: the teflin tape after described step 4 degreasing enters expander and stretches; Then the end of described expander cross directional stretch is placed hot setting baking oven, the temperature of hot setting baking oven is 400 ° of C, and shaping time was 50 seconds, forms thickness 30 microns, and aperture is at the poly tetrafluoroethylene of 0.6 micron.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (1)
1. a preparation method for poly tetrafluoroethylene, comprises the steps:
Step one: teflon resin and alkane solvent are mixed at 6-10 ° of C temperature, obtains compound;
Step 2: the compound getting the preparation of described step one is placed in stainless steel vessel, puts into 80 ° of C thermostat containers and is incubated 12-20 hour;
Step 3: make the compound after described step 2 process insert extrusion machine and carry out extruding, rolling the sheet teflin tape making thickness 0.1-0.3 millimeter, width 200-500 millimeter;
Step 4: the sheet teflin tape after described step 3 calendering enters degreasing baking oven and carries out degreasing, and skimming temp is 250-300 ° of C, and it is 1 m/min that front end unreels speed, and rolling speed is 10 ms/min; Solvent evaporates in sheet tetrafluoroethylene base band is formed, obtains the teflin tape after degreasing;
Step 5: the teflin tape after described step 4 degreasing enters expander and stretches; Then the end of described expander cross directional stretch is placed hot setting baking oven, the temperature of hot setting baking oven is 400 ° of C, and shaping time was 50 seconds, forms thickness 30 microns, and aperture is at the poly tetrafluoroethylene of 0.6 micron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410503784.XA CN104292485A (en) | 2014-09-28 | 2014-09-28 | Preparation method of polytetrafluoroethylene membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410503784.XA CN104292485A (en) | 2014-09-28 | 2014-09-28 | Preparation method of polytetrafluoroethylene membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104292485A true CN104292485A (en) | 2015-01-21 |
Family
ID=52312453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410503784.XA Pending CN104292485A (en) | 2014-09-28 | 2014-09-28 | Preparation method of polytetrafluoroethylene membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104292485A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111976173A (en) * | 2019-05-24 | 2020-11-24 | 安徽省众望科希盟科技有限公司 | Preparation process of unidirectional stretching polytetrafluoroethylene film |
-
2014
- 2014-09-28 CN CN201410503784.XA patent/CN104292485A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111976173A (en) * | 2019-05-24 | 2020-11-24 | 安徽省众望科希盟科技有限公司 | Preparation process of unidirectional stretching polytetrafluoroethylene film |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150121 |