CN104191635B - Method for improving physical properties of polyimide film and polyimide film production line - Google Patents
Method for improving physical properties of polyimide film and polyimide film production line Download PDFInfo
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- CN104191635B CN104191635B CN201410481724.2A CN201410481724A CN104191635B CN 104191635 B CN104191635 B CN 104191635B CN 201410481724 A CN201410481724 A CN 201410481724A CN 104191635 B CN104191635 B CN 104191635B
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Abstract
The invention relates to a method for improving physical properties of a polyimide film and a polyimide film production line. According to the method, a polyamide acid film obtained by casting is rolled for one to three times and then enters a drawing process; during rolling, the content of a solvent in the polyamide acid film is 30-100 percent; after longitudinal drawing and/or transverse drawing, the polyamide acid film is also rolled for one to three times; during rolling, the temperature is 50-180 DEG C. On the production line, one to three rolling moulds are arranged behind a casting machine, and one to three rolling moulds are arranged behind a drawing machine. The rolling moulds are roller type moulds or endless belt type moulds, each roller type mould comprises two same rolling rollers respectively positioned on and below the film, and each endless belt type mould comprises an upper rolling steel belt and a lower rolling steel belt which are the same and respectively encircle two rollers. The rolling moulds are positioned in a rolling oven, and/or a circulation channel is formed in each roller and used for receiving heat-conducting media. The method significantly improves the thickness uniformity, surface quality and roller smoothness of a following-up polyimide film product. The polyimide film production line is simple in structure and easy to implement.
Description
Technical field
The present invention relates to Kapton manufacturing technology, specially improve Kapton physical property method and
The Production Line for Polyimide Film adopting this method.
Background technology
Kapton is that a kind of have high intensity, high tenacity, the excellent properties such as wear-resistant, high temperature resistant, corrosion-resistant
Macromolecular material, is widely used in electrotechnical, electronic industry, is even more the master of various top grade electronic products particularly in electron trade
Will basic insulant.
The development trend of and High Reliability Design light, thin, short, little with downstream electronic product, the thin film of the market demand becomes
To in slimming, the apparent masses such as the performances such as the physics of Kapton, heat, chemistry and aberration are all proposed more simultaneously
High requirement.
The conventional method of currently manufactured Kapton is as follows：Led to using dimethyl acetylamide as solvent in reactor
The polycondensation reaction crossing dianhydride with diamidogen produces polyimide precursor polyamic acid resin solution, sialorrhea on slobbering machine afterwards
Obtain the Polyamic Acid Film with self-supporting, then carry out direction stretching, high temperature imidization in length and breadth, last thermal finalization process,
Winding.
Its physical property of Kapton product that existing process manufactures and apparent index are poor, and particularly thickness is uniform
The indexs such as property, aberration, percent thermal shrinkage, linear expansion coefficient, tensile strength, modulus and water absorption rate are poor.
In order to improve the performance of Kapton, one of existing method is to change polyimide precursor polyamic acid
The monomeric species of resins synthesis, that is, pass through to change usual resins synthesizing formula, by organic diamine monomer or organic firm for structure
Tetracarboxylic dianhydride monomer is introduced in the backbone structure of polyimide precursor film body polyamic acid, to obtain higher physics, heat, change
Etc. performance.But in the method there is such as biphenyl dianhydride (BPDA) high cost, monomer in the organic tetracarboxylic dianhydride of the firm monomer of structure
The problems such as organic diamine such as p-phenylenediamine (PPD) is oxidizable, simultaneously synthesizing condition is harsh, and input cost is higher.
The method of another kind of improvement Kapton performance is the polymerization by changing conventional polyamide acid resin,
Randomly blocked polymerization will be changed into by formula polymerization, the polyamic acid resin of formation can be obtained higher physics, heat, change
The Kapton product of etc. performance.But the method technological operation difficulty is larger, and viscosity adjustment is loaded down with trivial details, and synthesizer is a large amount of
Increase, input cost significantly improves.
Content of the invention
The purpose of the present invention is a kind of method improving Kapton physical property of design, sialorrhea gained polyamic acid
Self-supporting film enters back into stretching process after rolling process, and the physical property of obtained Kapton significantly improves.
It is another object of the present invention to design improves the Production Line for Polyimide Film of Kapton physical property,
Introduce after the slobbering machine of existing Production Line for Polyimide Film and roll mould, make the Polyamic Acid Film warp with self-supporting
Cross and enter back into stretching-machine after rolling process, to improve Kapton physical property.
The method of the improvement Kapton physical property of present invention design obtains through sialorrhea for polyamic acid resin solution
To the Polyamic Acid Film with self-supporting, then carry out direction stretching in length and breadth, high temperature imidization, wind after thermal finalization；Sialorrhea
Gained polyamic acid self-supporting film enters back into stretching process after 1～3 time is rolled process afterwards.
Rolling Polyamic Acid Film internal solvent content during process is 30%～100%.
This method be additionally included in vertical after drawing and/or horizontal draw after 1～3 time roll process, vertical draw after and/or horizontal draw after
Thin film enters back into subsequent processing through rolling process.
In order to obtain more preferable rolling effect, the described temperature rolling during process is 50 DEG C～180 DEG C.
Vertically and horizontally thickness is uniform through rolling process for Polyamic Acid Film, and the property such as physics, heat and thin film apparent mass can obtain
To improvement.
Method for implementing the improvement Kapton physical property of the present invention, the present invention devises improvement polyimides
The Production Line for Polyimide Film of thin film physicses performance, slobbering machine that it includes being arranged in order, stretching-machine, high temperature imidization stove,
Thermal finalization baking oven and winder, described stretching-machine includes vertical machine drawing and transverse stretching machine, or stretching-machine is bi-directional synchronization stretching-machine.
1～3 set is had to roll mould after slobbering machine.
Described stretching-machine includes vertical machine drawing and transverse stretching machine, has 1～3 set to roll mould after vertical machine drawing or transverse stretching machine, or
Respectively there is 1～3 set and roll mould after vertical machine drawing and transverse stretching machine.Described stretching-machine is bi-directional synchronization stretching-machine, draws in bi-directional synchronization
1～3 set is had to roll mould after stretching machine.
The described mould that rolls is pulley type mould or girdle type mould.
Described a set of pulley type mould is to be located at 2 upper and lower identicals of thin film respectively to roll roller, and rolling roller can turn
Be installed on frame and perpendicular to thin film direct of travel dynamicly, and on roll the centrage of roller with its immediately below lower milling roller
The centerline of cylinder is on same vertical guide.2 milling roller tube length degree are all higher than thin-film width 10mm～100mm, 2 milling rollers
Cylinder diameter is 10mm～1000mm, and one of them is rolled roller and is connected with drive mechanism；And respectively roll roller surface and its
The linear velocity direction of thin film of contact, size are identical.
Described a set of girdle type mould includes rolling steel band positioned at 2 upper and lower identicals of thin film respectively, and every is rolled steel
Band runs around 2 rollers, and the centerline of the centrage of upper roller and the lower roller immediately below it is on same vertical guide.
Article 2, roll width of steel band and be all higher than thin-film width 10mm～100mm, each roller is rotatably installed on frame, advance with thin film
Direction is vertical, and each roller length ratio rolls the wide 10～100mm of steel band, and each roller diameter is 10mm～1000mm, the same side two
The centre-to-centre spacing of roller is 2～3 times of diameter.Upper and lower respectively have a roller to be connected with drive mechanism.And respectively roll steel strip surface
The linear velocity direction of the thin film being in contact with it, size are identical.
The upper and lower gap rolled between roller, the upper and lower gap rolled between steel band is the polyamide with self-supporting
The 80%～98% of sour film thickness, preferably 92%～96%.
In order to obtain more preferable rolling effect, described roll mould and be in roll in baking oven, rolling oven temperature is 50
DEG C～180 DEG C.
And/or, the upper and lower of described pulley type mould rolls roller, all has heat conduction in each roller of described girdle type mould
The circulation duct of medium, the import and export of circulation duct is connected with heat conducting medium heating apparatus delivery outlet, input port respectively, each roller
The heat-conducting medium temperature of cylinder circulation duct entrance is 50 DEG C～180 DEG C.Described heat-conducting medium is conduction oil or steam or molten
Salt.
Compared with prior art, the present invention improves the method for Kapton physical property and Kapton produces
The advantage of line is：1st, self-supporting Polyamic Acid Film thickness evenness significantly improves, existing uniformity only 10%, place of the present invention
After reason, uniformity brings up to 2%；2nd, the thickness evenness of follow-up Kapton product improves, aberration reduces, and improves table
Face quality, film roll planarization improves；3rd, because Polyamic Acid Film is through rolling, the physics of follow-up Kapton product
Performance such as tensile strength, modulus, percent thermal shrinkage are also improved；4th, structure is simple, and existing Production Line for Polyimide Film is only
Need to set up at corresponding position to roll mould, do not affect the structure of primary producing line；5th, existing polyimides need not be changed
The technological parameter of film line, only need to increase to the control respectively rolling mould, production line routinely runs substantially, operation side
Just.
Brief description
Fig. 1 is the structured flowchart of the Production Line for Polyimide Film embodiment of this improvement Kapton physical property.
Fig. 2 is the Production Line for Polyimide Film embodiment girdle type mould of this improvement Kapton physical property
Structural representation.
Fig. 3 is the Production Line for Polyimide Film embodiment pulley type mould of this improvement Kapton physical property
Structural representation.
Figure internal label is：1st, girdle type mould, 11, upper roller, 12, on roll steel band, 13, lower roller, 14, under roll steel
Band, 2, pulley type mould, 21, on roll roller, 22, under roll roller, 3, roll baking oven, 4, thin film.
Specific embodiment
The Production Line for Polyimide Film embodiment of this improvement Kapton physical property as shown in figure 1, from a left side to
Right each equipment is as follows successively：Slobbering machine, the first girdle type mould 1, the second girdle type mould, vertical machine drawing, the first pulley type mould
2nd, transverse stretching machine, the second pulley type mould, high temperature imidization stove, thermal finalization baking oven, packaged air conditioner and winder.
2 sets of girdle type moulds 1 after this example casting machine are as shown in Fig. 2 the first girdle type mould 1 and the second girdle type mould
1 is in and rolls in baking oven 3, rolls temperature in baking oven 3 and is 145 DEG C, 2 sets girdle type moulds 1 are identical, often covers girdle type mould 1 and wrap
Include be located at respectively in the upper and lower identical of thin film 4 roll steel band 12 and under roll steel band 14, above roll steel band 12 on 2
Roller 11 runs, under roll steel band 14 and run around 2 lower rollers 13, upper and lower roll steel band 12, that 14 width are more than thin film 4 is wide
Degree 60mm, upper and lower roller 11,13 is rotatably installed on frame, vertical with thin film 4 direct of travel, and upper and lower roller 11,13 is long
Degree rolls steel band 12,14 wide 60mm than upper and lower, upper and lower roller 11,13 a diameter of 200mm, and the centre-to-centre spacing of two upper rollers 11 is
600mm, the centre-to-centre spacing of two lower rollers 13 is 600mm.And in the centrage of upper roller 11 and the lower roller 13 immediately below it
Heart line is on same vertical guide.Upper roller 11 with respectively have a roller in lower roller 13 and be connected with drive mechanism.And it is upper and lower
Roll steel band 12, the linear velocity direction of thin film 4 that 14 surfaces are in contact with it, size identical.
The each upper and lower roller 11,13 of this example girdle type mould all has a heat-conducting medium circulation duct, circulation duct into and out of
Mouth is connected with heat conducting medium heating apparatus delivery outlet, input port respectively, and this example heat-conducting medium is conduction oil, and heat conduction oil temperature is
145℃.
Identical with first, second pulley type mould 2 after transverse stretching machine, the one of structure such as Fig. 3 institute of the vertical machine drawing of this example
Show, pulley type mould 2 is in and rolls in baking oven 3, roll temperature in baking oven 3 and be 165 DEG C, identical rolls roller 21 and lower stone roller
Pressure roller cylinder 22 is upper and lower positioned at thin film 4 respectively, and the upper and lower roller 21,22 that rolls is rotatably installed on frame and perpendicular to thin film 4
Direct of travel, and on roll the centrage of roller 21 with its immediately below under roll the centerline of roller 22 in same vertical guide
On.Upper and lower roll roller 21,22 length are more than thin film 4 width 60mm, upper and lower roll roller 21,22 a diameter of 200mm, wherein
One is rolled roller and is connected with drive mechanism；And upper and lower roll roller 21, the linear velocity of thin film 4 that 22 surfaces are in contact with it
Direction, size are identical.
Roll in this example roller 21, under roll between roller 22 gap, above roll steel band 12, under roll between steel band 14
Gap be Polyamic Acid Film thickness 93%.
Can implement originally to change using the Production Line for Polyimide Film embodiment of this improvement Kapton physical property
The method entering Kapton physical property, polyamic acid resin solution obtains thering is the poly- of self-supporting through slobbering machine sialorrhea
Amic acid thin film, this example Polyamic Acid Film internal solvent content now is 80%, and Polyamic Acid Film enters first, second ring
Rolling in baking oven, after first, second girdle type mould rolls process for 145 DEG C, 2 times of belt mould, enters vertical machine drawing and enters
Row longitudinal stretching, enter back into the first pulley type mould afterwards rolls baking oven, and through the first pulley type mould, 165 DEG C are rolled process
Afterwards, enter back into transverse stretching machine and carry out cross directional stretch, enter the second pulley type mould afterwards rolls baking oven again, then through the second pulley type
After 165 DEG C of mould rolls process, carry out high temperature imidization, wind after thermal finalization.This example sialorrhea, vertical draw, horizontal draw, imidization and heat
Sizing is all using Conventional process parameters.
Sialorrhea in comparative example Kapton manufacture process, vertical draw, horizontal draw, the technological parameter of imidization and thermal finalization with
The present embodiment is identical, does not simply have compaction technologies at different levels to process.Comparative example and the property of the present embodiment gained Kapton
Can be as shown in table 1：
Table 1 comparative example and the present embodiment gained Kapton Performance comparision table
| Performance indications | Embodiment | Comparative example |
| Thickness (μm) | 25 | 25 |
| Thickness evenness (%) | 2.0 | 10.0 |
| Product aberration (Δ E value) | 0.16 | 0.45 |
| Tensile strength (MPa) | 232 | 185 |
| Modulus (GPa) | 3.4 | 2.6 |
| Percent thermal shrinkage (%) | 0.08 | 0.16 |
| Linear expansion coefficient (ppm/ DEG C) | 32 | 46 |
| Water absorption rate (%) | 1.5 | 2.9 |
The method gained Kapton of Kapton physical property is improved and without this by the visible present invention of table 1
Method processes gained Kapton and compares, and the performance such as physics, heat obtains larger improvement.Thickness evenness significantly improves, color
Difference substantially reduces, and tensile strength is then significantly increased 47MPa, and modulus improves 0.8GPa, and percent thermal shrinkage is only 50% left side of comparative example
The right side, thermal coefficient of expansion reduces by more than 30%, and water absorption rate then reduces about one times.Kapton quality significantly improves.
Above-described embodiment, only the purpose of the present invention, technical scheme and beneficial effect are further described is concrete
Individual example, the present invention is not limited to this.All any modifications made within the scope of disclosure of the invention, equivalent, change
Enter, be all contained within protection scope of the present invention.
Claims (3)
1. improve the Production Line for Polyimide Film of Kapton physical property, slobbering machine that it includes being arranged in order, draw
Stretch machine, high temperature imidization stove, thermal finalization baking oven and winder, described stretching-machine includes vertical machine drawing and transverse stretching machine, or stretching-machine
For bi-directional synchronization stretching-machine；It is characterized in that：
Have 1～3 set to roll mould after described slobbering machine, described roll mould and be in roll in baking oven (3), roll in baking oven (3)
Temperature is 50 DEG C～180 DEG C, and the described Polyamic Acid Film internal solvent content that rolls during process is 30%～100%；
The described mould that rolls is pulley type mould (2) or girdle type mould (1)；
Described a set of pulley type mould (2) is to be located at 2 upper and lower identicals of thin film (4) respectively to roll roller, 2 milling rollers
Cylinder is rotatably installed on frame, perpendicular to thin film (4) direct of travel, and on roll the centrage of roller (21) with its immediately below
Under roll the centerline of roller (22) on same vertical guide；2 milling roller tube length degree are all higher than thin film (4) width 10mm
～100mm, 2 a diameter of 10mm～1000mm rolling roller, one of them is rolled roller and is connected with drive mechanism；And it is each
The linear velocity direction, the size that roll the thin film that roller surface is in contact with it are identical；
Described a set of girdle type mould (1) includes rolling steel band positioned at 2 upper and lower identicals of thin film (4) respectively, and every is rolled
Steel band runs around 2 rollers, and 2 are rolled width of steel band and are all higher than thin film (4) width 10～100mm, and each roller is rotationally
Be installed on frame, vertical with thin film (4) direct of travel, and the centrage of upper roller (21) with its immediately below lower roller (23)
Centerline is on same vertical guide；Each roller length all ratios roll the wide 10mm～100mm of steel band, each roller diameter be 10mm～
1000mm, the centre-to-centre spacing of two the same side rollers is 2～3 times of diameter；Upper and lower respectively have a roller to be connected with drive mechanism
Connect；And the upper and lower linear velocity direction of thin film (4) that steel strip surface is in contact with it, the size of rolling is identical；
The upper and lower of described pulley type mould (2) rolls roller, and each roller of described girdle type mould (1) all has heat-conducting medium
Circulation duct, the import of circulation duct, outlet are connected with heat conducting medium heating apparatus delivery outlet, input port respectively, and each roller is led
Heat-conducting medium temperature at medium passing conduit entrance is 50 DEG C～180 DEG C；
The described upper and lower gap rolled between roller (21,22), the upper and lower gap rolled between steel band (12,14) is to have certainly
The 80%～98% of the Polyamic Acid Film thickness of supportive.
2. the Production Line for Polyimide Film improving Kapton physical property according to claim 1；Its feature
It is：
The described upper and lower gap rolled between roller (21,22), the upper and lower gap rolled between steel band (12,14) is to have certainly
The 92%～96% of the Polyamic Acid Film thickness of supportive.
3. the Production Line for Polyimide Film improving Kapton physical property according to claim 1, its feature
It is：
Described stretching-machine includes vertical machine drawing and transverse stretching machine, has 1～3 set to roll mould after vertical machine drawing or transverse stretching machine, or vertical
Respectively there is 1～3 set after machine drawing and transverse stretching machine and roll mould；
Described stretching-machine is bi-directional synchronization stretching-machine, has 1～3 set to roll mould after bi-directional synchronization stretching-machine.
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| CN201410481724.2A CN104191635B (en) | 2014-09-19 | 2014-09-19 | Method for improving physical properties of polyimide film and polyimide film production line |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203077621U (en) * | 2013-03-13 | 2013-07-24 | 衡水学院 | Production equipment for film containing inorganic component |
| CN103232609A (en) * | 2013-04-25 | 2013-08-07 | 安徽朝日电子新能源有限公司 | Preparation method of coal ash modified nanometer aluminum oxide/polyimide composite film |
| CN103624996A (en) * | 2012-08-22 | 2014-03-12 | 上海杰事杰新材料(集团)股份有限公司 | Equipment used for preparing continuous fabric reinforced thermoplastic resin |
| CN204160786U (en) * | 2014-09-19 | 2015-02-18 | 桂林电器科学研究院有限公司 | Improve the Production Line for Polyimide Film of Kapton physical property |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4792357B2 (en) * | 2005-09-28 | 2011-10-12 | 富士フイルム株式会社 | Method for producing polymer film |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103624996A (en) * | 2012-08-22 | 2014-03-12 | 上海杰事杰新材料(集团)股份有限公司 | Equipment used for preparing continuous fabric reinforced thermoplastic resin |
| CN203077621U (en) * | 2013-03-13 | 2013-07-24 | 衡水学院 | Production equipment for film containing inorganic component |
| CN103232609A (en) * | 2013-04-25 | 2013-08-07 | 安徽朝日电子新能源有限公司 | Preparation method of coal ash modified nanometer aluminum oxide/polyimide composite film |
| CN204160786U (en) * | 2014-09-19 | 2015-02-18 | 桂林电器科学研究院有限公司 | Improve the Production Line for Polyimide Film of Kapton physical property |
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