CN102219918A - Thermal imidization method for polymide film - Google Patents
Thermal imidization method for polymide film Download PDFInfo
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- CN102219918A CN102219918A CN2011101238475A CN201110123847A CN102219918A CN 102219918 A CN102219918 A CN 102219918A CN 2011101238475 A CN2011101238475 A CN 2011101238475A CN 201110123847 A CN201110123847 A CN 201110123847A CN 102219918 A CN102219918 A CN 102219918A
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- polyamic acid
- film
- acid film
- kapton
- steel belt
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- Moulding By Coating Moulds (AREA)
- 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 the Kapton technical field, especially a kind of Kapton hot imidization method that is used for the suitability for industrialized production of Kapton.
Background technology
In the production process of Kapton, hot imidization is the main method with the Kapton imidization, and the method that adopts has three kinds at present:
First kind: unidirectional tractive method: polyamic acid resin is cast on the steel band,, obtains the polyamic acid film after the drying through the baking oven baking; The polyamic acid film is carried out hot imidization by the hot imidization stove handle under unidirectional (film take-up direction) traction force, obtain.Because polyamic acid imidization process is carried out under unidirectional traction force in this method, the polyamic acid film has excellent mechanical intensity and dimensional stability on direction of draw, and the size of direction of draw can not diminish, and physical strength and dimensional stability are all relatively poor.
Second kind: two-way chain folder tractive method: on the steel band with the polyamic acid resin coating,, obtain the polyamic acid film after the drying through the baking oven baking; Vertically by film take-up power tractive, transverse ends keeps with chain folder tractive by the hot imidization stove with the polyamic acid film.This method is because the polyamic acid film carries out hot imidization under two-way traction force effect handle, so the Kapton of making horizontal and vertical all has excellent mechanical intensity and dimensional stability; But need to use the chain folder in producing, thus the complex structure of equipment, cost an arm and a leg, the failure rate height.
The third: the two-way tractive method of needle plate: just on the steel band of polyamic acid resin coating,, obtain the polyamic acid film after the drying through the baking oven baking; Vertically by film take-up power tractive, simultaneously, transverse ends is passed through the hot imidization stove down by the needle plate tractive with the polyamic acid film.This 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, cause the horizontal size of film that dwindling to a certain degree arranged, so horizontal physical strength and dimensional stability are relatively poor.
Summary of the invention
At the deficiency of above existing polyamic acid film hot imidization method, the purpose of this invention is to provide a kind of horizontal and vertical imidization method that can both obtain good stretching, keep excellent mechanical intensity and dimensional stability of polyamic acid film.
The objective of the invention is by realizing by the following technical solutions: a kind of Kapton hot imidization method, it may further comprise the steps:
S1, polyamic acid resin is coated the Steel Belt surface, heating makes its dry polyamic acid film that forms to the polyamic acid resin on the Steel Belt;
S2, the bottom transverse two ends of dried polyamic acid film are pasted respectively be fixed on two stationary installations that can be synchronized with the movement with film, the polyamic acid film is indulged under film take-up power tractive, make the polyamic acid film together with stationary installation process high-temperature sub amination stove, thereby make the imidization of polyamic acid film become Kapton, again Kapton is separated with fixing steel band.
As optimized technical scheme of the present invention, the bottom transverse two ends of polyamic acid film are pasted by sizing agent respectively or are fixed on two movable stationary installations without the method for sizing agent heat posted.
As optimized technical scheme of the present invention, described stationary installation is fixing steel band.
As optimized technical scheme of the present invention, described stationary installation is a salver.
With respect to prior art, the invention has the advantages that: the polyamic acid film is to carry out imidization to handle under vertical, horizontal two-way tractive, and film does not have dimensional change before and after handling, so the film after making has excellent mechanical intensity and dimensional stability; Use steel band or salver as horizontal pulling device, device structure is simple, the reliability height, and amphicheirality's favourable identity of film, horizontal and vertical all have good dimensional stability and a physical strength.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing and specific embodiment:
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 Kapton hot imidization method of present embodiment may further comprise the 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, be provided with one resin-coated 20 directly over one roll shaft 30, 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 Steel Belt 40 surfaces by resin-coated 20, through Steel Belt 40 transmissions, simultaneously, the polyamic acid resin heating that is arranged on 10 pairs of Steel Belts 40 of baking oven of conveyer belt system top makes its drying, Steel Belt 40 drives to two roller bearings, 30 belows, the polyamic acid film heating that is 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 obtains the polyamic acid film by peeling off on the Steel Belt 40.
S3, as shown in Figure 2, dried polyamic acid film 50 is sticked in fixedly on the steel band 70, the polyamic acid film is laterally fixedly vertically passing through high-temperature sub amination 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, go out behind the imidization stove again with fixing steel band 70 to separate, obtain Kapton.
In the above-mentioned embodiment, can pasting by being coated on fixedly the 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.
Said fixing steel band 70 also can be substituted by salver.
Claims (4)
1. a Kapton hot imidization method is characterized in that, may further comprise the steps:
S1, polyamic acid resin is coated the Steel Belt surface, heating makes its dry polyamic acid film that forms to the polyamic acid resin on the Steel Belt;
S2, the bottom transverse two ends of dried polyamic acid film are pasted respectively be fixed on two stationary installations that can be synchronized with the movement with film, the polyamic acid film is indulged under film take-up power tractive, make the polyamic acid film together with stationary installation process high-temperature sub amination stove, thereby make the imidization of polyamic acid film become Kapton, again Kapton is separated with fixing steel band.
2. a kind of Kapton hot imidization method 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 on two movable stationary installations without the method for sizing agent heat posted.
3. a kind of Kapton hot imidization method according to claim 1 and 2 is characterized in that, described stationary installation is fixing steel band.
4. a kind of Kapton hot imidization method according to claim 1 and 2 is characterized in that described stationary installation is a salver.
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 |
Applications Claiming Priority (1)
| 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 true CN102219918A (en) | 2011-10-19 |
| CN102219918B 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350790A (en) * | 2011-06-30 | 2012-02-15 | 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 |
-
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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350790A (en) * | 2011-06-30 | 2012-02-15 | 王利平 | Polyimide film bidirectional draw-off mechanism |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN102219918B (en) | 2014-03-12 |
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Granted publication date: 20140312 Termination date: 20200513 |