CN108892903A - Polytetrafluoroethylene film and preparation method thereof - Google Patents
Polytetrafluoroethylene film and preparation method thereof Download PDFInfo
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- CN108892903A CN108892903A CN201810663963.8A CN201810663963A CN108892903A CN 108892903 A CN108892903 A CN 108892903A CN 201810663963 A CN201810663963 A CN 201810663963A CN 108892903 A CN108892903 A CN 108892903A
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- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 120
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 120
- -1 Polytetrafluoroethylene Polymers 0.000 title claims abstract description 95
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000003822 epoxy resin Substances 0.000 claims abstract description 25
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 25
- 239000000843 powder Substances 0.000 claims abstract description 24
- 239000006184 cosolvent Substances 0.000 claims abstract description 17
- 239000003999 initiator Substances 0.000 claims abstract description 17
- 239000004094 surface-active agent Substances 0.000 claims abstract description 17
- 239000002270 dispersing agent Substances 0.000 claims abstract description 14
- 239000003350 kerosene Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000002356 single layer Substances 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 23
- 239000002131 composite material Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 16
- 239000002904 solvent Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000000110 cooling liquid Substances 0.000 claims description 10
- 239000010410 layer Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 7
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 229920006266 Vinyl film Polymers 0.000 claims description 3
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims 1
- MEYZYGMYMLNUHJ-UHFFFAOYSA-N tunicamycin Natural products CC(C)CCCCCCCCCC=CC(=O)NC1C(O)C(O)C(CC(O)C2OC(C(O)C2O)N3C=CC(=O)NC3=O)OC1OC4OC(CO)C(O)C(O)C4NC(=O)C MEYZYGMYMLNUHJ-UHFFFAOYSA-N 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 239000012528 membrane Substances 0.000 abstract description 8
- 238000002834 transmittance Methods 0.000 abstract description 7
- 230000001105 regulatory effect Effects 0.000 description 21
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- SVTBMSDMJJWYQN-UHFFFAOYSA-N 2-methylpentane-2,4-diol Chemical compound CC(O)CC(C)(C)O SVTBMSDMJJWYQN-UHFFFAOYSA-N 0.000 description 8
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 6
- 208000027418 Wounds and injury Diseases 0.000 description 4
- LFRJGOFQPHQKKA-UHFFFAOYSA-N [Na].OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F Chemical compound [Na].OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F LFRJGOFQPHQKKA-UHFFFAOYSA-N 0.000 description 4
- HDDMREWZGLZQMX-UHFFFAOYSA-N azanium;carbonofluoridate Chemical group [NH4+].[O-]C(F)=O HDDMREWZGLZQMX-UHFFFAOYSA-N 0.000 description 4
- 229940106691 bisphenol a Drugs 0.000 description 4
- 238000000748 compression moulding Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 229940051250 hexylene glycol Drugs 0.000 description 4
- 208000014674 injury Diseases 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- LWHQXUODFPPQTL-UHFFFAOYSA-M sodium;2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluorooctanoate Chemical compound [Na+].[O-]C(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F LWHQXUODFPPQTL-UHFFFAOYSA-M 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 150000004291 polyenes Chemical class 0.000 description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical group [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 3
- 235000019394 potassium persulphate Nutrition 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000001458 anti-acid effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 150000004968 peroxymonosulfuric acids Chemical group 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 125000002730 succinyl group Chemical group C(CCC(=O)*)(=O)* 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use 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; Derivatives of such polymers
- C08J2327/02—Characterised by the use 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; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use 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; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention discloses a polytetrafluoroethylene membrane and a preparation method thereof, wherein the polytetrafluoroethylene membrane is prepared from the following raw materials in parts by weight: 600-700 portions of polytetrafluoroethylene powder, 20-30 portions of kerosene, 10-20 portions of epoxy resin, 1-3 portions of surfactant, 1-3 portions of cosolvent, 1-2 portions of dispersant and 0.5-1 portion of initiator. The polytetrafluoroethylene membrane is obtained by uniformly mixing the raw materials and processing the raw materials through procedures of feeding roller processing, tension adjustment and the like. The light transmittance of the polytetrafluoroethylene film disclosed by the invention is greatly increased, and the high temperature resistance, the wear resistance and the mechanical tensile strength are also increased, so that compared with the prior art, the polytetrafluoroethylene film has higher performance and wider application field.
Description
Technical field
The present invention relates to polytetrafluoroethylene (PTFE) technical field of membrane, more particularly to a kind of polytetrafluoroethylene film and its system
Preparation Method.
Background technique
Polytetrafluoroethylene (PTFE), commonly referred to as " non-sticking lining " or " material easy to clean "；Be it is a kind of used fluorine replace polyethylene
In all hydrogen atoms artificial synthesized high molecular material.This material has the characteristics that antiacid alkali resistant, resists various organic solvents, several
All solvents are not dissolved in.Meanwhile polytetrafluoroethylene (PTFE) has the characteristics that resistant to high temperature, its coefficient of friction is extremely low, so can make
After lubricating action, also become the ideal coating of non-stick fry pan and water pipe internal layer.
Currently, polytetrafluoroethylene film is mainly used in electronics and garment industry, and generally monofilm, aperture is big, tough
Property is low, and wearability and heat-resisting ability are poor；If being applied to electronic field, it is mainly used as waterproof and insulate material, Huo Zheying
For solar panel, but polytetrafluoroethylene film in the prior art is mostly monofilm, and translucency is poor, largely
Cause the waste of solar energy resources.
Therefore, how to provide a kind of good polytetrafluoroethylene film of performance is asking for those skilled in the art's urgent need to resolve
Topic.
Summary of the invention
In view of this, the present invention provides a kind of polytetrafluoroethylene film and preparation method thereof, such polytetrafluoroethylene (PTFE) film property
Can be high-quality, and be high-throughput type polytetrafluoroethylene film.
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of polytetrafluoroethylene film is made of the raw material that following weight parts match：
Polytetrafluorethylepowder powder 600-700, kerosene 20-30, epoxy resin 10-20, surfactant 1-3, cosolvent 1-3, divide
Powder 1-2, initiator 0.5-1.Wherein, the purity of the polytetrafluoroethylene (PTFE) be 99.9%, crystallinity≤80%, partial size 0.1-
0.2 μm, molecular weight be 8,000,000-1,200 ten thousand；The initiator is potassium peroxydisulfate, and the dispersing agent is perfluorocarboxylic acid ammonium salt；Institute
Stating cosolvent is one of toluene, hexylene glycol or ethyl acetate or a variety of；The surfactant is that polyene-based succinyl is sub-
One of amine, Sodium perfluorooctanoate or perfluoro octyl sulfonic acid sodium are a variety of；The epoxy resin is bisphenol-A shape epoxy resin.Ring
The addition of oxygen resin is conducive to enhance the curing performance of mixture, convenient for the curing molding of polytetrafluorethylepowder powder, to enhance it
Adhesion strength is conducive to its advantageous bonding between solar energy photovoltaic panel, increases light transmittance.Simultaneously, moreover it is possible to be applied
In fields such as micro porous filtration, clothes, its performance is improved, expands its application range.
Optionally, the polytetrafluoroethylene film is made of the raw material of more excellent weight below：
Polytetrafluorethylepowder powder 650, kerosene 25, epoxy resin 15, surfactant 2, cosolvent 2, dispersing agent 2, initiator
0.75。
A kind of preparation method of polytetrafluoroethylene film, it is prepared by following step：
（1）Kerosene, dispersing agent, epoxy resin, surfactant and cosolvent are mixed according to the above mentioned proportion uniformly, formed compound
Solvent；
（2）By the step（1）Double solvents and initiator be added into polytetrafluorethylepowder powder, stir evenly, in inertia
In cooked at constant in gas, Curing material is obtained；Wherein, the rate of stirring is 20-80 r/min, and the condition of cooked at constant is 24-40
DEG C curing 8-12 h；
（3）To the step（2）Obtained Curing material is pressed and molded, and finished product is obtained；
（4）By the step（3）Finished product stand 20-30 h after, be heat-treated, keep 24-36 h；
（5）It is quickly cooled down with the rate of temperature fall of 40-60 DEG C/min through the step using cooling liquid（4）Treated sample, and
It is dried after 1-2 h；
（6）Sample after drying in the step (5) is sliced, section sample is obtained；
（7）Using ozone plasma to the step（7）Section sample be modified processing, obtain single layer polytetrafluoroethylene (PTFE)
Film；
（8）By step described in several layers（7）Middle gained single layer polytetrafluoroethylene film doubling overlapping, forms the multilayer film of overlapping, institute
It states multilayer film and obtains polytetrafluoroethylene film after multiple working procedure is handled.
Double solvents is added into polytetrafluorethylepowder powder, stirs evenly, is conducive in 10-18 DEG C of isoperibol
Optimization polytetrafluoroethylene (PTFE) molecule puts in order, to improve the light transmittance and film-formation result of single layer polytetrafluoroethylene film；To at
Product are heat-treated, and using specific heating mode, are more advantageous to the qualitative performance for improving molecular structure, are improved the knot of molecule
Structure；Using plasma is modified processing to section sample, and the surface-active of slice can be improved；Monofilm is converted into multilayer
Film forms the polytetrafluoroethylene film of high-throughput type, can reduced bore diameter, increase the toughness and tension of film.It is ventilative to promote it
Property, filter efficiency and service life.
Optionally, the step（3）In, the pressure of compression molding is 40-65MPa, and squeeze time is 1-10 min, and is protected
Press 5-20 min.
Optionally, the step（5）In cooling liquid be -10~0 DEG C water and alcohol mixed liquor, in the mixed liquor
The mass ratio of water and alcohol is 1：0.5-1.
Optionally, the step（4）Middle heat treatment process is：Temperature program：Heating rate from 25 DEG C to 320 DEG C is 20
DEG C/min, 320-330 DEG C of heating rate is 5 DEG C/min, and 330-370 DEG C of heating rate is 10 DEG C/min.
Optionally, the step（8）In the step of preparing multilayer polytetrafluoroethylarticles film include：
1）The multilayer film is fed into hot blast adhesion device through feeding roller, the road I then is carried out to the multilayer film with the road I thermal current
Hot blast adhesion processing obtains the road I bonding multilayer film；The temperature of the road I thermal current is 250-350 DEG C, the fortune of the multilayer film
Dynamic speed is 4.0-6.0 m/min；
2）To the step 1）The obtained road I bonding multilayer film carries out the processing of the road II hot blast adhesion, and it is compound to obtain polytetrafluoroethylene (PTFE)
Film；The temperature of the road II thermal current is 250-350 DEG C, and the movement velocity of the road the I bonding multilayer film is 4.5-6.5 m/
min；
3）To the step 2）Obtained polytetrafluoroethylcomposite composite film carries out tension adjustment processing, and winds output, obtains poly- four
Fluoride film.
The present invention bonds polytetrafluoroethylmulti multi-layer film through upper and lower impact softening by using thermal current, will not injury of primary
The hole and mechanical property of polytetrafluoroethylene film realize that the abundant softening to composite membrane bonds；High-throughput type polytetrafluoroethylene (PTFE)
With a thickness of 10-20 μm, Air permenbility is 70-90 L/dm3/ min and porosity are 85-90%, compared to conventional multilayer polytetrafluoro
Vinyl film has better porosity, thickness and Air permenbility.
Optionally, the porosity of the single layer polytetrafluoroethylene film is 75-80%；The thickness of the single layer polytetrafluoroethylene film
Degree is 0.005-0.008 mm；The width of the single layer polytetrafluoroethylene film is 1500-2000 mm；The single layer polytetrafluoroethyl-ne
The Air permenbility of alkene film is 70-90 L/dm3/min。
It can be seen via above technical scheme that compared with prior art, the present disclosure provides one kind suitable for multiple
Epoxy resin is added in the polytetrafluoroethylene film in field and preparation method thereof in polytetrafluoroethylene powder, increases the caking property of film
Can, it can preferably be applied to solar-energy photo-voltaic cell field, meanwhile, light transmittance greatly improves, up to 90.5% or more；And
And obtained by technical solution of the present invention be high-throughput type polytetrafluoroethylene film, with better high temperature resistant, mechanical draw
It stretches and applies also for high-temperature-resistant filtering material because making the present invention can be applied not only to field of solar energy with anti abrasive performance, be overlying on
Non-woven filter felt surface while improving service life, improves the filter effect to fine particle.
Specific embodiment
Described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Embodiment one：
The embodiment of the invention discloses a kind of polytetrafluoroethylene films, are made of the raw material that following weight parts match：Polytetrafluoroethylene (PTFE)
Powder 600, kerosene 20, epoxy resin 10, surfactant 1, cosolvent 1, dispersing agent 1, initiator 0.5.Wherein, polytetrafluoroethyl-ne
The purity of alkene is 99.9%, crystallinity 80%, partial size are 0.1 μm, molecular weight is 8,000,000；Initiator is potassium peroxydisulfate, dispersion
Agent is perfluorocarboxylic acid ammonium salt；Cosolvent is one of toluene, hexylene glycol or ethyl acetate or a variety of；Surfactant is polyenoid
One of base succimide, Sodium perfluorooctanoate or perfluoro octyl sulfonic acid sodium are a variety of；Epoxy resin is bisphenol-A shape asphalt mixtures modified by epoxy resin
Rouge.The addition of epoxy resin is conducive to enhance the curing performance of mixture, convenient for the curing molding of polytetrafluorethylepowder powder, to increase
Its strong adhesion strength, is conducive to its advantageous bonding between solar energy photovoltaic panel, simultaneously, moreover it is possible to be applied to micropore mistake
The fields such as filter, clothes improve its performance, expand its application range.
A kind of preparation method of polytetrafluoroethylene film, it is prepared by following step：
（1）Kerosene, dispersing agent, epoxy resin, surfactant and cosolvent are mixed according to the above mentioned proportion uniformly, formed compound
Solvent；
（2）By step（1）Double solvents and initiator be added into polytetrafluorethylepowder powder, stirred evenly at 10 DEG C of constant temperature,
In cooked at constant in inert gas, Curing material is obtained；Wherein, the rate of stirring is 20 r/min, and the condition of cooked at constant is 24
DEG C curing 8 h；Double solvents is added into polytetrafluorethylepowder powder, stirs evenly, is conducive in 10 DEG C of isoperibol
Optimization polytetrafluoroethylene (PTFE) molecule puts in order, to improve the light transmittance and film-formation result of single layer polytetrafluoroethylene film；
（3）To the step（2）Obtained Curing material is pressed and molded, and finished product is obtained；
（4）By the step（3）Finished product stand 20 h after, be heat-treated, keep 24 h；Finished product is heat-treated, is adopted
With specific heating mode, it is more advantageous to the qualitative performance for improving molecular structure, improves the structure of molecule；
（5）It is quickly cooled down with the rate of temperature fall of 40 DEG C/min through the step using cooling liquid（4）Treated sample, and in 1
It is dried after h；
（6）To the step（5）Sample after middle drying is sliced, and section sample is obtained；
（7）Using ozone plasma to the step（6）Section sample be modified processing, obtain single layer polytetrafluoroethylene (PTFE)
Film；Using plasma is modified processing to section sample, and the surface-active of slice can be improved；
（8）By step described in several layers（7）Middle gained single layer polytetrafluoroethylene film doubling overlapping, forms the multilayer film of overlapping, institute
It states multilayer film and obtains polytetrafluoroethylene film after multiple working procedure is handled.Monofilm is converted into multilayer film, forms high-throughput type
Polytetrafluoroethylene film, can reduced bore diameter, increase the toughness and tension of film.Promote its gas permeability, filter efficiency and use
Service life.
Optionally, step（3）In, the pressure of compression molding is 40MPa, and squeeze time is 1 min, and 5 min of pressure maintaining.
Optionally, step（5）In cooling liquid be -10 DEG C water and alcohol mixed liquor, water and alcohol in mixed liquor
Mass ratio is 1：0.5.
Optionally, step（4）Middle heat treatment process is：Temperature program：Heating rate from 25 DEG C to 320 DEG C is 20 DEG C/
Min, 320-330 DEG C of heating rate is 5 DEG C/min, and 330-370 DEG C of heating rate is 10 DEG C/min.
Optionally, step（8）In the step of preparing multilayer polytetrafluoroethylarticles film include：
1）Multilayer film is fed into hot blast adhesion device through feeding roller, the road I hot blast adhesion then is carried out to multilayer film with the road I thermal current
Processing obtains the road I bonding multilayer film；The temperature of the road I thermal current is 250 DEG C, and the movement velocity of the multilayer film is 4.0 m/
min；
2）To step 1）The obtained road I bonding multilayer film carries out tension adjustment, and is handled using the road II hot blast adhesion, obtains poly- four
Fluoride composite film；The temperature of the road II thermal current is 250 DEG C, and the movement velocity that the road I bonds multilayer film is 4.5 m/min；Wherein
The step of tension adjustment is：Tension adjustment is carried out on first, second and third road dance roller, makes multilayer complex films
Tension force in 5 N, first of dance roller and second dance roller are in same level, third road level
Power regulating roller is located at the lower section of second dance roller, and third road regulating roller and first of regulating roller and second are adjusted
Vertical range between roller is 400 mm, first, the revolving speed of second and third road dance roller be 4.3 m/min.
3）To step 2）Obtained polytetrafluoroethylcomposite composite film carries out tension adjustment processing, and winds output, obtains poly- four
Fluoride film.Wherein tension adjustment processing carries out in the following way：By polytetrafluoroethylcomposite composite film in the four, the 5th and
Tension adjustment is carried out on 6th dance roller, makes 5 N of tension of polytetrafluoroethylcomposite composite film, the 5th dance roller
It is in same vertical level with the 6th dance roller, the 4th Horizontal Tension regulating roller and is between five and the 6th
Horizontal distance be 200 mm, and vertical range is 400 mm, and the 6th regulating roller is located at the lower section 800 of the 5th regulating roller
At mm, the revolving speed of three regulating rollers is 4.5 m/min.
Optionally, the porosity of single layer polytetrafluoroethylene film is 75%；Single layer polytetrafluoroethylene film with a thickness of 0.005
mm；The width of single layer polytetrafluoroethylene film is 1500 mm；The Air permenbility of single layer polytetrafluoroethylene film is 70 L/dm3/min。
The present invention bonds polytetrafluoroethylmulti multi-layer film through upper and lower impact softening by using thermal current, will not injury of primary
The hole and mechanical property of polytetrafluoroethylene film realize that the abundant softening to composite membrane bonds；High-throughput type polytetrafluoroethylene (PTFE)
With a thickness of 10 μm, Air permenbility is 70 L/dm3/ min and porosity are 85%, are had compared to conventional multilayer polytetrafluoroethylarticles film
Better porosity, thickness and Air permenbility.
Embodiment two
The embodiment of the invention discloses a kind of polytetrafluoroethylene films, are made of the raw material that following weight parts match：Polytetrafluoroethylene (PTFE)
Powder 650, kerosene 25, epoxy resin 15, surfactant 2, cosolvent 2, dispersing agent 1.5, initiator 0.75.Wherein, poly- four
The purity of vinyl fluoride is 99.9%, crystallinity 75%, partial size are 0.15 μm, molecular weight is 10,000,000；Initiator is persulfuric acid
Potassium, dispersing agent are perfluorocarboxylic acid ammonium salt；Cosolvent is one of toluene, hexylene glycol or ethyl acetate or a variety of；Surface-active
Agent is one of polyene-based succimide, Sodium perfluorooctanoate or perfluoro octyl sulfonic acid sodium or a variety of；Epoxy resin is bisphenol-A
Shape epoxy resin.The addition of epoxy resin is conducive to enhance the curing performance of mixture, convenient for the solidification of polytetrafluorethylepowder powder
Molding, to enhance its adhesion strength, is conducive to its advantageous bonding between solar energy photovoltaic panel, simultaneously, moreover it is possible to be applied
In fields such as micro porous filtration, clothes, its performance is improved, expands its application range.
A kind of preparation method of polytetrafluoroethylene film, it is prepared by following step：
（1）Kerosene, dispersing agent, epoxy resin, surfactant and cosolvent are mixed according to the above mentioned proportion uniformly, formed compound
Solvent；
（2）By step（1）Double solvents and initiator be added into polytetrafluorethylepowder powder, stirred evenly at 14 DEG C of constant temperature,
In cooked at constant in inert gas, Curing material is obtained；Wherein, the rate of stirring is 50 r/min, and the condition of cooked at constant is 30
DEG C curing 10 h；Double solvents is added into polytetrafluorethylepowder powder, stirs evenly, is conducive in 14 DEG C of isoperibol
Optimization polytetrafluoroethylene (PTFE) molecule puts in order, to improve the light transmittance and film-formation result of single layer polytetrafluoroethylene film；
（3）To the step（2）Obtained Curing material is pressed and molded, and finished product is obtained；
（4）By the step（3）Finished product stand 24 h after, be heat-treated, keep 30 h；Finished product is heat-treated, is adopted
With specific heating mode, it is more advantageous to the qualitative performance for improving molecular structure, improves the structure of molecule；
（5）It is quickly cooled down with the rate of temperature fall of 50 DEG C/min through the step using cooling liquid（4）Treated sample, and in
It is dried after 1.5 h；
（6）To the step（5）Sample after middle drying is sliced, and section sample is obtained；
（7）Using ozone plasma to the step（6）Section sample be modified processing, obtain single layer polytetrafluoroethylene (PTFE)
Film；Using plasma is modified processing to section sample, and the surface-active of slice can be improved；
（8）By step described in several layers（7）Middle gained single layer polytetrafluoroethylene film doubling overlapping, forms the multilayer film of overlapping, institute
It states multilayer film and obtains polytetrafluoroethylene film after multiple working procedure is handled.Monofilm is converted into multilayer film, forms high-throughput type
Polytetrafluoroethylene film, can reduced bore diameter, increase the toughness and tension of film.Promote its gas permeability, filter efficiency and use
Service life.
Optionally, step（3）In, the pressure of compression molding is 50MPa, and squeeze time is 5 min, and 10 min of pressure maintaining.
Optionally, step（5）In cooling liquid be -5 DEG C water and alcohol mixed liquor, the matter of water and alcohol in mixed liquor
Amount is than being 1：0.75.
Optionally, step（4）Middle heat treatment process is：Temperature program：Heating rate from 25 DEG C to 320 DEG C is 20 DEG C/
Min, 320-330 DEG C of heating rate is 5 DEG C/min, and 330-370 DEG C of heating rate is 10 DEG C/min.
Optionally, step（8）In the step of preparing multilayer polytetrafluoroethylarticles film include：
1）Multilayer film is fed into hot blast adhesion device through feeding roller, the road I hot blast adhesion then is carried out to multilayer film with the road I thermal current
Processing obtains the road I bonding multilayer film；The temperature of the road I thermal current is 300 DEG C, and the movement velocity of the multilayer film is 5.0 m/
min；
2）To step 1）The obtained road I bonding multilayer film carries out tension adjustment, and is handled using the road II hot blast adhesion, obtains poly- four
Fluoride composite film；The temperature of the road II thermal current is 300 DEG C, and the movement velocity that the road I bonds multilayer film is 5 m/min；Wherein open
Power adjust the step of be：Tension adjustment is carried out on first, second and third road dance roller, makes multilayer complex films
Tension force is in same level, third road Horizontal Tension in 8 N, first of dance roller and second dance roller
Regulating roller is located at the lower section of second dance roller, and third road regulating roller and first of regulating roller and second regulating roller
Between vertical range be 500 mm, first, the revolving speed of second and third road dance roller be 5.3 m/min.
3）To step 2）Obtained polytetrafluoroethylcomposite composite film carries out tension adjustment processing, and winds output, obtains poly- four
Fluoride film.Wherein tension adjustment processing carries out in the following way：By polytetrafluoroethylcomposite composite film in the four, the 5th and
Tension adjustment is carried out on 6th dance roller, makes 8 N of tension of polytetrafluoroethylcomposite composite film, the 5th dance roller
It is in same vertical level with the 6th dance roller, the 4th Horizontal Tension regulating roller and is between five and the 6th
Horizontal distance be 300 mm, and vertical range is 500 mm, and the 6th regulating roller is located at the lower section 900 of the 5th regulating roller
At mm, the revolving speed of three regulating rollers is 5.5 m/min.
Optionally, the porosity of single layer polytetrafluoroethylene film is 77%；Single layer polytetrafluoroethylene film with a thickness of 0.006
mm；The width of single layer polytetrafluoroethylene film is 1800 mm；The Air permenbility of single layer polytetrafluoroethylene film is 80 L/dm3/min。
The present invention bonds polytetrafluoroethylmulti multi-layer film through upper and lower impact softening by using thermal current, will not injury of primary
The hole and mechanical property of polytetrafluoroethylene film realize that the abundant softening to composite membrane bonds；High-throughput type polytetrafluoroethylene (PTFE)
With a thickness of 15 μm, Air permenbility is 80 L/dm3/ min and porosity are 88%, are had compared to conventional multilayer polytetrafluoroethylarticles film
Better porosity, thickness and Air permenbility.
Embodiment three
The embodiment of the invention discloses a kind of polytetrafluoroethylene films, are made of the raw material that following weight parts match：Polytetrafluoroethylene (PTFE)
Powder 700, kerosene 30, epoxy resin 20, surfactant 3, cosolvent 3, dispersing agent 2, initiator 1.Wherein, polytetrafluoroethylene (PTFE)
Purity be 99.9%, crystallinity 60%, partial size are 0.2 μm, molecular weight is 12,000,000；Initiator is potassium peroxydisulfate, dispersing agent
For perfluorocarboxylic acid ammonium salt；Cosolvent is one of toluene, hexylene glycol or ethyl acetate or a variety of；Surfactant is polyene-based
One of succimide, Sodium perfluorooctanoate or perfluoro octyl sulfonic acid sodium are a variety of；Epoxy resin is bisphenol-A shape asphalt mixtures modified by epoxy resin
Rouge.The addition of epoxy resin is conducive to enhance the curing performance of mixture, convenient for the curing molding of polytetrafluorethylepowder powder, to increase
Its strong adhesion strength, is conducive to its advantageous bonding between solar energy photovoltaic panel, simultaneously, moreover it is possible to be applied to micropore mistake
The fields such as filter, clothes improve its performance, expand its application range.
A kind of preparation method of polytetrafluoroethylene film, it is prepared by following step：
（1）Kerosene, dispersing agent, epoxy resin, surfactant and cosolvent are mixed according to the above mentioned proportion uniformly, formed compound
Solvent；
（2）By step（1）Double solvents and initiator be added into polytetrafluorethylepowder powder, stirred evenly at 18 DEG C of constant temperature,
In cooked at constant in inert gas, Curing material is obtained；Wherein, the rate of stirring is 80 r/min, and the condition of cooked at constant is 40
DEG C curing 12 h；Double solvents is added into polytetrafluorethylepowder powder, stirs evenly, is conducive in 18 DEG C of isoperibol
Optimization polytetrafluoroethylene (PTFE) molecule puts in order, to improve the light transmittance and film-formation result of single layer polytetrafluoroethylene film；
（3）To the step（2）Obtained Curing material is pressed and molded, and finished product is obtained；
（4）By the step（3）Finished product stand 30 h after, be heat-treated, keep 36 h；Finished product is heat-treated, is adopted
With specific heating mode, it is more advantageous to the qualitative performance for improving molecular structure, improves the structure of molecule；
（5）It is quickly cooled down with the rate of temperature fall of 60 DEG C/min through the step using cooling liquid（4）Treated sample, and in 2
It is dried after h；
（6）To the step（5）Sample after middle drying is sliced, and section sample is obtained；
（7）Using ozone plasma to the step（6）Section sample be modified processing, obtain single layer polytetrafluoroethylene (PTFE)
Film；Using plasma is modified processing to section sample, and the surface-active of slice can be improved；
（8）By step described in several layers（7）Middle gained single layer polytetrafluoroethylene film doubling overlapping, forms the multilayer film of overlapping, institute
It states multilayer film and obtains polytetrafluoroethylene film after multiple working procedure is handled.Monofilm is converted into multilayer film, forms high-throughput type
Polytetrafluoroethylene film, can reduced bore diameter, increase the toughness and tension of film.Promote its gas permeability, filter efficiency and use
Service life.
Optionally, step（3）In, the pressure of compression molding is 65MPa, and squeeze time is 10 min, and 20 min of pressure maintaining.
Optionally, step（5）In cooling liquid be 0 DEG C water and alcohol mixed liquor, the matter of water and alcohol in mixed liquor
Amount is than being 1：1.
Optionally, step（4）Middle heat treatment process is：Temperature program：Heating rate from 25 DEG C to 320 DEG C is 20 DEG C/
Min, 320-330 DEG C of heating rate is 5 DEG C/min, and 330-370 DEG C of heating rate is 10 DEG C/min.
Optionally, step（8）In the step of preparing multilayer polytetrafluoroethylarticles film include：
1）Multilayer film is fed into hot blast adhesion device through feeding roller, the road I hot blast adhesion then is carried out to multilayer film with the road I thermal current
Processing obtains the road I bonding multilayer film；The temperature of the road I thermal current is 250 DEG C, and the movement velocity of the multilayer film is 6.0 m/
min；
2）To step 1）The obtained road I bonding multilayer film carries out tension adjustment, and is handled using the road II hot blast adhesion, obtains poly- four
Fluoride composite film；The temperature of the road II thermal current is 250 DEG C, and the movement velocity that the road I bonds multilayer film is 6.5 m/min；Wherein
The step of tension adjustment is：Tension adjustment is carried out on first, second and third road dance roller, makes multilayer complex films
Tension force in 10 N, first of dance roller and second dance roller are in same level, and third road is horizontal
Dance roller is located at the lower section of second dance roller, and third road regulating roller and first of regulating roller and second tune
Saving the vertical range between roller is 600 mm, first, the revolving speed of second and third road dance roller be 6.3 m/min.
3）To step 2）Obtained polytetrafluoroethylcomposite composite film carries out tension adjustment processing, and winds output, obtains poly- four
Fluoride film.Wherein tension adjustment processing carries out in the following way：By polytetrafluoroethylcomposite composite film in the four, the 5th and
Tension adjustment is carried out on 6th dance roller, makes 10 N of tension of polytetrafluoroethylcomposite composite film, the 5th tension adjustment
Roller and the 6th dance roller are in same vertical level, the 4th Horizontal Tension regulating roller with the 5th and the 6th it
Between horizontal distance be 400 mm, and vertical range is 600 mm, and the 6th regulating roller is located at the lower section of the 5th regulating roller
At 1000 mm, the revolving speed of three regulating rollers is 6.5 m/min.
Optionally, the porosity of single layer polytetrafluoroethylene film is 80%；Single layer polytetrafluoroethylene film with a thickness of 0.008
mm；The width of single layer polytetrafluoroethylene film is 2000 mm；The Air permenbility of single layer polytetrafluoroethylene film is 90 L/dm3/min。
The present invention bonds polytetrafluoroethylmulti multi-layer film through upper and lower impact softening by using thermal current, will not injury of primary
The hole and mechanical property of polytetrafluoroethylene film realize that the abundant softening to composite membrane bonds；High-throughput type polytetrafluoroethylene (PTFE)
With a thickness of 20 μm, Air permenbility is 90 L/dm3/ min and porosity are 90%, are had compared to conventional multilayer polytetrafluoroethylarticles film
Better porosity, thickness and Air permenbility.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (8)
1. a kind of polytetrafluoroethylene film, which is characterized in that be made of the raw material that following weight parts match：
Polytetrafluorethylepowder powder 600-700, kerosene 20-30, epoxy resin 10-20, surfactant 1-3, cosolvent 1-3, divide
Powder 1-2 and initiator 0.5-1.
2. a kind of polytetrafluoroethylene film according to claim 1, which is characterized in that by the original of following more excellent weights
Material is made：
Polytetrafluorethylepowder powder 650, kerosene 25, epoxy resin 15, surfactant 2, cosolvent 2, dispersing agent 2 and initiator
0.75。
3. a kind of preparation method of polytetrafluoroethylene film, which is characterized in that it is prepared by following step：
（1）Kerosene, dispersing agent, epoxy resin, surfactant and cosolvent are mixed according to the above mentioned proportion uniformly, formed compound
Solvent；
（2）By in the step (1) double solvents and initiator be added into polytetrafluorethylepowder powder, stir evenly, in lazy
Cooked at constant in property gas, obtains Curing material；
（3）Curing material obtained by the step (2) is pressed and molded, finished product is obtained；
（4）After the finished product of the step (3) is stood 20-30 h, it is heat-treated；
（5）It is quickly cooled down with the rate of temperature fall of 40-60 DEG C/min through the step using cooling liquid（4）Treated finished product, and
It is dried after 1-2 h；
（6）Sample after drying in the step (5) is sliced, section sample is obtained；
（7）Using ozone plasma to the step（7）Obtained section sample is modified processing, obtains single layer polytetrafluoro
Vinyl film；
（8）By step described in several layers（7）Middle gained single layer polytetrafluoroethylene film doubling overlapping, forms the multilayer film of overlapping, institute
It states multilayer film and obtains polytetrafluoroethylene film through processing.
4. a kind of preparation method of polytetrafluoroethylene film according to claim 3, which is characterized in that the step（3）In,
The pressure of pre-molding is 40-65MPa, and squeeze time is 1-10 min, and pressure maintaining 5-20 min.
5. a kind of preparation method of polytetrafluoroethylene film according to claim 3, which is characterized in that the step（5）In
Cooling liquid be -10~0 DEG C water and alcohol mixed liquor, the mass ratio of water and alcohol is 1 in the mixed liquor：0.5-1.
6. a kind of preparation method of polytetrafluoroethylene film as claimed in claim 3, which is characterized in that the step（4）At middle heat
Managing program includes：Heating rate from 25 DEG C to 320 DEG C is 20 DEG C/min, and 320-330 DEG C of heating rate is 5 DEG C/min,
330-370 DEG C of heating rate is 10 DEG C/min.
7. a kind of preparation method of polytetrafluoroethylene film according to claim 3, it is characterised in that the step（8）In it is more
Tunic through processing obtain polytetrafluoroethylene film the step of include：
1）The multilayer film is fed into hot blast adhesion device through feeding roller, the road I then is carried out to the multilayer film with the road I thermal current
Hot blast adhesion processing obtains the road I bonding multilayer film；The temperature of the road I thermal current is 250-350 DEG C, the fortune of the multilayer film
Dynamic speed is 4.0-6.0 m/min；
2）To the step 1）The obtained road I bonding multilayer film carries out the processing of the road II hot blast adhesion, and it is compound to obtain polytetrafluoroethylene (PTFE)
Film；The temperature of the road II thermal current is 250-350 DEG C, and the movement velocity of the road the I bonding multilayer film is 4.5-6.5m/min；
3）To the step 2）Obtained polytetrafluoroethylcomposite composite film carries out tension adjustment processing, and winds output, obtains poly- four
Fluoride film.
8. a kind of preparation method of polytetrafluoroethylene film according to claim 3, which is characterized in that the single layer polytetrafluoro
The porosity of vinyl film is 75-80%；The single layer polytetrafluoroethylene film with a thickness of 0.005-0.008 mm；The single layer is poly-
The width of tetrafluoroethylene is 1500-2000 mm；The Air permenbility of the single layer polytetrafluoroethylene film is 70-90 L/dm3/min。
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105199131A (en) * | 2015-09-01 | 2015-12-30 | 北京汉能光伏投资有限公司 | Preparation method and application of polytetrafluoroethylene film for unmanned aerial vehicle |
| CN105255078A (en) * | 2015-09-23 | 2016-01-20 | 徐�明 | Polytetrafluoroethylene film for solar panels, and making method thereof |
| CN105983352A (en) * | 2015-02-16 | 2016-10-05 | 上海灵氟隆新材料科技有限公司 | High-flux thick polytetrafluoroethylene film and preparation method thereof |
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2018
- 2018-06-25 CN CN201810663963.8A patent/CN108892903A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105983352A (en) * | 2015-02-16 | 2016-10-05 | 上海灵氟隆新材料科技有限公司 | High-flux thick polytetrafluoroethylene film and preparation method thereof |
| CN105199131A (en) * | 2015-09-01 | 2015-12-30 | 北京汉能光伏投资有限公司 | Preparation method and application of polytetrafluoroethylene film for unmanned aerial vehicle |
| CN105255078A (en) * | 2015-09-23 | 2016-01-20 | 徐�明 | Polytetrafluoroethylene film for solar panels, and making method thereof |
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