CN102219918B - Thermal imidization method for polymide film - Google Patents
Thermal imidization method for polymide film Download PDFInfo
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- CN102219918B CN102219918B CN201110123847.5A CN201110123847A CN102219918B CN 102219918 B CN102219918 B CN 102219918B CN 201110123847 A CN201110123847 A CN 201110123847A CN 102219918 B CN102219918 B CN 102219918B
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- film
- polyamic acid
- acid film
- imidization
- steel belt
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- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The invention provides a thermal imidization method for a polymide film. The method comprises the following steps: spreading polyamic acid resin on the surface of a driving steel belt, and heating for drying the polyamic acid resin on the driving steel belt to form a polyamic acid film; respectively sticking and fixing the transverse two ends of the bottom of the dried polyamic acid film on two fixed devices which can synchronously move together with the film, wherein the polyamic acid film is longitudinally stretched by a film rolling force, so that the polyamic acid film, together with the fixed devices, passes through a high temperature imidization furnace so that the polyamic acid film is subjected to imidization so as to form the polymide film; and then separating the polymide film from the fixed steel belt. According to the invention, the polyamic acid film performs imidization treatment under the longitudinal and transverse bidirectional stretch, and the prepared film has good mechanical strength and good size stability; and the steel belt or metal disk is used as a transverse stretch device, equipment structure is simple and has a high reliability, and the bidirectionality of the film is good in identity.
Description
Technical field
The present invention relates to Kapton technical field, especially a kind of thermal imidization method for polymide film of the suitability for industrialized production for Kapton.
Background technology
In the production process of Kapton, hot imidization is by the main method of Kapton imidization, and the method adopting at present has three kinds:
The first: unidirectional tractive method: polyamic acid resin is cast on steel band, through baking oven baking, obtains Polyamic Acid Film after being dried; Polyamic Acid Film is carried out to hot imidization processing by hot imidization stove under unidirectional (film take-up direction) traction force, obtain.Because polyamic acid imidization process in the method is carried out under unidirectional traction force, Polyamic Acid Film has good physical strength and dimensional stability in direction of draw, and the size of direction of draw can not diminish, and physical strength and dimensional stability are all poor.
The second: Two-way Chain folder tractive method: by the steel band of polyamic acid resin coating, through baking oven baking, obtain Polyamic Acid Film after being dried; By Polyamic Acid Film, longitudinally by film take-up power tractive, transverse ends keeps with chain folder tractive by hot imidization stove.The method is because Polyamic Acid Film carries out hot imidization processing under two-way traction force effect, so the Kapton of making horizontal and vertical has good physical strength and dimensional stability; But in producing, need to use chain folder, so the complex structure of equipment, expensive, failure rate is high.
The third: the two-way tractive method of needle plate: just, on the steel band of polyamic acid resin coating, through baking oven baking, obtain Polyamic Acid Film after being dried; By Polyamic Acid Film, longitudinally by film take-up power tractive, meanwhile, transverse ends is by passing through hot imidization stove under needle plate tractive.The method and method two are similar, because the pin on the horizontal dependence needle plate of Polyamic Acid Film fixes film, pin hole can cause film drawing crack to a certain degree when hot imidization, causes the horizontal size of film to have dwindling to a certain degree, so horizontal physical strength and dimensional stability are poor.
Summary of the invention
For the deficiency of above existing Polyamic Acid Film hot imidization method, what the object of this invention is to provide a kind of Polyamic Acid Film horizontal and vertically can obtain good stretching, keeps good physical strength and the imidization method of dimensional stability.
The object of the invention is by realizing by the following technical solutions: a kind of thermal imidization method for polymide film, it comprises the following steps:
S1, polyamic acid resin is coated to Steel Belt surface, the polyamic acid resin heating on Steel Belt is made to its dry Polyamic Acid Film that forms;
S2, the bottom transverse two ends of dried Polyamic Acid Film are pasted respectively and are fixed in two stationary installations that can be synchronized with the movement with film, Polyamic Acid Film is indulged under film take-up power tractive, make Polyamic Acid Film together with stationary installation process high temperature imidization stove, thereby make Polyamic Acid Film imidization become Kapton, then by Kapton with fixedly steel band is separated.
As the preferred technical scheme of the present invention, the bottom transverse two ends of Polyamic Acid Film are pasted by sizing agent respectively or are fixed in two movable stationary installations without the method for sizing agent heat posted.
As the preferred technical scheme of the present invention, described stationary installation is fixing steel band.
As the preferred technical scheme of the present invention, described stationary installation is salver.
With respect to prior art, the invention has the advantages that: Polyamic Acid Film is to carry out imidization processing under longitudinal, horizontal two-way tractive, film does not have dimensional change before and after processing, so the film after making has good physical strength and dimensional stability; Use steel band or salver as horizontal pulling device, device structure is simple, and reliability is high, amphicheirality's favourable identity of film, and horizontal and vertical all have good dimensional stability and a physical strength.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and specific embodiment, the invention will be further described:
Fig. 1 is the structural representation of polyamic acid film deposition system of the present invention;
Fig. 2 is the principle schematic of the imidization of Polyamic Acid Film of the present invention.
Embodiment
The thermal imidization method for polymide film of present embodiment comprises the following steps:
S1, provide a polyamic acid film deposition system, as shown in Figure 1, it comprises the two parallel baking ovens 10 that are oppositely arranged, is arranged at the conveyer belt system between two baking ovens 10, this conveyer belt system comprises two roll shafts 30, is arranged at the Steel Belt 40 between this two roll shaft 30, Steel Belt 40 between two roll shafts 30 is all parallel with this two baking oven 10, directly over one roll shaft 30, be provided with one resin-coated 20, Steel Belt 40 can be driven towards the direction transmission away from resin-coated 20 by this two roller bearing 30.
S2, polyamic acid resin is coated to Steel Belt 40 surfaces by resin-coated 20, through Steel Belt 40 transmissions, simultaneously, the polyamic acid resin heating being arranged on 10 pairs of Steel Belts 40 of baking oven of conveyer belt system top makes it dry, Steel Belt 40 drives to two roller bearing 30 belows, the Polyamic Acid Film heating being arranged on 10 pairs of Steel Belts 40 of baking oven of conveyer belt system below makes it further dry, and dried Polyamic Acid Film is by peeling off and obtain Polyamic Acid Film on Steel Belt 40.
S3, as shown in Figure 2, dried Polyamic Acid Film 50 is sticked in fixedly on steel band 70, Polyamic Acid Film is laterally fixedly longitudinally passing through high temperature imidization stove 60 under steel band 70 tractives under the tractive of rolling power, Polyamic Acid Film hot imidization in hot imidization stove 60 becomes Kapton, after going out imidization stove, steel band 70 is separated again with fixedly, obtains Kapton.
In above-mentioned embodiment, can pasting by being coated on the fixedly sizing agent on steel band 70 surfaces with fixing steel band 70 of Polyamic Acid Film 50, also can not apply any sizing agent, utilize the stickiness of Polyamic Acid Film 50 self and fixedly steel band 70 paste.
Above-mentioned fixedly steel band 70 also can be substituted by salver.
Claims (2)
1. a thermal imidization method for polymide film, is characterized in that, comprises the following steps:
S1, polyamic acid resin is coated to Steel Belt surface, the polyamic acid resin heating on Steel Belt is made to its dry Polyamic Acid Film that forms;
S2, the bottom transverse two ends of dried Polyamic Acid Film are pasted respectively and are fixed in two stationary installations that can be synchronized with the movement with film, Polyamic Acid Film longitudinally under film take-up power tractive, make Polyamic Acid Film together with stationary installation process high temperature imidization stove, thereby make Polyamic Acid Film imidization become Kapton, then by Kapton with fixedly steel band is separated.
2. a kind of thermal imidization method for polymide film according to claim 1, is characterized in that, the bottom transverse two ends of Polyamic Acid Film are pasted by sizing agent respectively or are fixed in two movable stationary installations without the method for sizing agent heat posted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110123847.5A CN102219918B (en) | 2011-05-13 | 2011-05-13 | Thermal imidization method for polymide film |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110123847.5A CN102219918B (en) | 2011-05-13 | 2011-05-13 | Thermal imidization method for polymide film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102219918A CN102219918A (en) | 2011-10-19 |
| CN102219918B true CN102219918B (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110123847.5A Expired - Fee Related CN102219918B (en) | 2011-05-13 | 2011-05-13 | Thermal imidization method for polymide film |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350790B (en) * | 2011-06-30 | 2014-07-30 | 王利平 | Polyimide film bidirectional draw-off mechanism |
| CN104448363A (en) * | 2014-04-23 | 2015-03-25 | 六安市杜尔邦绝缘材料有限公司 | Process flow for preparing polyimide film |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168598A (en) * | 2007-10-08 | 2008-04-30 | 江阴市云达电子新材料有限公司 | Method for preparing ultra-thick polyimide film with high heat conductivity and low thermal expansion coefficient |
| CN101613484A (en) * | 2009-07-14 | 2009-12-30 | 桂林电器科学研究所 | The imidization method of Kapton and imidization equipment |
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2011
- 2011-05-13 CN CN201110123847.5A patent/CN102219918B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168598A (en) * | 2007-10-08 | 2008-04-30 | 江阴市云达电子新材料有限公司 | Method for preparing ultra-thick polyimide film with high heat conductivity and low thermal expansion coefficient |
| CN101613484A (en) * | 2009-07-14 | 2009-12-30 | 桂林电器科学研究所 | The imidization method of Kapton and imidization equipment |
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| CN102219918A (en) | 2011-10-19 |
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