Cold processing process and polyimide film production line for manufacturing polyimide film
A polyimide film, cold treatment technology, applied in the direction of flat products, other household appliances, household appliances, etc., can solve the problems that have not yet been seen to significantly improve the electrical, thermal, physical and other properties of polyimide films. and other problems, to achieve the effects of improved performance, uniform stretching, and easy facility renovation.
Active Publication Date: 2014-12-10
GUILIN ELECTRICAL EQUIP SCI RES INST
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Problems solved by technology
[0008] At present, there is no new process that can significantly improve the electrical, thermal, and physical properties of polyimide films and can be used for continuous manufacturing of polyimide films.
Method used
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[0032] Example of this polyimide film production line figure 1 As shown, the equipment from left to right is as follows: drooling machine, cold air box, longitudinal drawing machine, cold air box, horizontal drawing machine, cold air box, high temperature imidization furnace, heat setting oven, cold air box and winder.
[0033] In this example, the air cooler figure 2 As shown, there are 7 transition rollers 3 parallel to each other in the box, and the film 4 entering the cold air box bypasses each transition roller 3 in turn, and the travel process of the film 4 is S-shaped on the section perpendicular to the centerline of the rollers. The time for film 4 to be processed in each cold air box is 60 seconds.
[0034] In this example, the cold air box is an insulated box, in which a cold air inlet 5 and a cold air outlet 2 are installed, and cold air is blown into the box to maintain the low temperature in the cold air box. Maintain the low temperature in the air cooler. The...
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Abstract
The invention discloses a cold processing process and a polyimide film production line for manufacturing a polyimide film. The cold processing process comprises the following step that a polyimide acid self-supporting film obtained after casting is performed enters a drawing process after being subjected to cold processing at -60 DEG C to 25 DEG C for 0.05 to 3 minutes. The cold processing process also comprises the step of carrying out the cold processing at one or more positions after the polyimide acid self-supporting film is longitudinally drawn, transversely drawn and thermally shaped, wherein the cold processing temperature at the positions close to a winding process is gradually decreased according to 10 to 30 percent, and the cold processing time is 0.05 to 3 minutes; the cold processing temperature after the polyimide acid self-supporting film is thermally shaped is -90 to 0 DEG C. According to the polyimide film production line in which the cold processing process is performed, a cold air box is arranged behind a casting machine. Cold air boxes are also arranged behind a longitudinal drawing machine, and / or a transverse drawing machine and / or a thermal shaping drying box. The film is processed for 0.05 to 3 minutes in the cold air box at each position. Through cold processing, the film is prevented from oxidizing and adsorbing moisture before drawing; the electrical performance and the mechanical performance of the film are remarkably improved; the cold processing process and the polyimide film production line are easy to implement.
Description
technical field [0001] The invention relates to polyimide film manufacturing technology, in particular to a cold treatment process for manufacturing polyimide film and a polyimide film production line using the process. Background technique [0002] Polyimide film is a polymer material with excellent properties such as high strength, high toughness, wear resistance, high temperature resistance, and corrosion resistance. It is the main insulating material for making various medium and high-end electrical and electronic components, and is widely used in electrical and electronic industry. [0003] With the development trend of light, thin, short, small and high-reliability design of downstream electronic products, the film demanded by the market tends to be thinner. requirements. [0004] At present, the conventional method of manufacturing polyimide film is as follows: in the reactor, dimethylacetamide is used as a solvent to produce a polyimide precursor polyamic acid solu...
Claims
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IPC IPC(8): B29D7/01B29C35/16
Inventor任小龙汪英李耀星
OwnerGUILIN ELECTRICAL EQUIP SCI RES INST