Method for improving physical properties of polyimide film and polyimide film production line

A technology of polyimide film and physical properties, which is applied in the polyimide film production line to improve the physical properties of polyimide film, can solve the problems of doubling the investment cost, increasing the number of synthesis devices, and cumbersome viscosity adjustment. Achieve the effects of simple structure, improved thickness uniformity, and improved film roll flatness

Active Publication Date: 2014-12-10
GUILIN ELECTRICAL EQUIP SCI RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process operation of this method is difficult, the viscosity adjustment is cumbersome, the number of synthesis devices is increased, and the input cost is doubled.

Method used

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  • Method for improving physical properties of polyimide film and polyimide film production line
  • Method for improving physical properties of polyimide film and polyimide film production line
  • Method for improving physical properties of polyimide film and polyimide film production line

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Embodiment Construction

[0029] The embodiment of the polyimide film production line of this improved polyimide film physical properties figure 1 As shown, the equipment from left to right is as follows: salivation machine, first endless belt die 1, second endless belt die, longitudinal drawing machine, first roller die 2, horizontal drawing machine, second roller type mold, high temperature imidization furnace, heat setting oven, cold air box and winder.

[0030] In this example, 2 sets of belt molds behind the tape casting machine 1 such as figure 2 As shown, the first endless belt mold 1 and the second endless belt mold 1 are in the rolling oven 3, and the temperature in the rolling oven 3 is 145°C. The two sets of endless belt molds 1 are the same, and each set of endless belt molds 1 includes the same upper rolling steel belt 12 and lower rolling steel belt 14 located on and below the film 4 respectively, the upper rolling steel belt 12 runs around two upper rollers 11, and the lower rolling st...

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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 [0001] The invention relates to a polyimide film manufacturing technology, in particular to a method for improving the physical properties of the polyimide film and a polyimide film production line using the method. 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 widely used in the electrical and electronic industries, especially in the electronics industry. The main basic insulating material of electronic products. [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. At the same time, the physical, thermal and chemical properties of polyimide film and the appearance Quality has put forward higher requirements. [0004] At present, the conventional method for producing pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D7/01B29C43/24B29C55/12
Inventor 任小龙姬亚宁张俊杰
Owner GUILIN ELECTRICAL EQUIP SCI RES INST
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