Method and facility for improving amination rate of side of polyamide acid film

Abstract

The invention discloses a method and facility for improving amination rate of a side of a polyamide acid film. According to the method, the side is heated before the polyamide acid film stripped from a steel band is stretched; the temperature close to an outer edge is gradually increased; the side of the film is sprayed with a chemical amination bath foam before being stretched; the surface temperature of the side of the polyamide acid film is improved during the stretching process; the surface temperature of the side of the polyamide acid film is improved before entering a high-temperature zone in amination; and amination is carried out in advance, so as to increase the strength. By virtue of the facility, a plurality of columns of heating tubes are arranged above and / or below the side part of the film before equipment is stretched; a chemical amination spraying device is arranged on the side of the film before the equipment is stretched; plenum chambers for improving temperature are arranged above and / or below the side part in the stretching equipment; and auxiliary heating tubes are additionally arranged above and / or below the side part of the film. The method and the facility are easy to implement; the amination rate of the side of the film is improved; and the strength is increased; the film is prevented from being broken in gripping and pulling manners; and the yield of the film is improved.

Description

technical field [0001] The invention relates to a polyimide film manufacturing technology, in particular to a method and facility for increasing the imidization rate of the side edge of a polyamic acid film. 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. At present, the preparation process of polyimide film is to use polyamic acid resin solution as raw material, and salivate on a salivating machine to obtain a self-supporting polyamic acid film, and then undergo heating stretching, high temperature imidization, cooling and shaping to obtain a polyimide film. amine film. [0003] With the design requirements of light, thin, short, small and high reliabi...

AI Technical Summary

Problems solved by technology

The high temperature encountered in the double-layer side clamping process makes the film at the clamping position of the chain clip easy to tear, which also leads to the abnormal winding of the product and reduces the yield of the film product.

[0008] In the actual production line, the clip opening position of the polyimide film is close to the traction and winding device. When the clip is opened, the film is subject to the comprehensive effects of tensile stress, traction tension and winding tension, which are prone to cracking, transverse fracture and other film rupture phenomena, resulting in The film cannot be wound normally, seriously affecting the film yield and reducing the film output

[0009] In order to solve the problems of broken edges and film breaks during the preparation of polyimide films, related patent applications have appeared in recent years, such as the Chinese utility model patent "Clamp-in guide device for film production equipment" with the announcement number CN202245464U, and the publication number is The Chinese invention patent of CN102441987A "chain clip cooling device for film production machinery", the Chinese invention patent of CN102431161A "advance clip opening device of film production line", the Chinese invention patent of CN102390112A "film stretching setting or tensioning Film clamping device for sizing equipment", the Chinese utility model patent with the notification number CN203236699U "a system for solving film stretching and uniform thickness", which discloses the guide device for entering the clip, the cooling device for the chain clip, and the clip opening in advance Although the clamping device and the clamping device have reduced the problem of pinching or tearing the side of the film, it has not completely eliminated such failures.

Moreover, these devices all need to modify or replace the existing production line equipment. The device structure is relatively complicated and requires high modification costs, so it is difficult to implement widely.

[0010] In addition, the Chinese invention patent with the publication number CN102416684A "Method for Disposal of Adhesive Tapes Produced by Salivating Machine Films", the Chinese Invention Patent with publication number CN102303388A "Treatment Method for Adhesive Tapes Produced by Salivating Machine Films", and the Chinese Utility Model Patent "Automatic Tape Production" with the publication number CN202147343U The "polyimide film production device for wiping release agent" etc. is to improve the manufacturing process to deal with abnormalities such as film rupture and film breakage caused by drool adhesive tape. There are many adjustment process parameters and a large adjustment range, especially the introduction of such as wiping release agent It will cause the film to be too smooth and cannot be normally applied to downstream products, such as side effects

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