Preparation method of polyimide/polytetrafluoroethylene composite film for wire and cable insulation
A technology of polytetrafluoroethylene and polyimide, which is used in conductor/cable insulation, insulators, circuits, etc., can solve the problems of high cost, low comprehensive performance and complex process.
Active Publication Date: 2021-02-19
扬泰氟(清远)电线电缆有限公司
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Problems solved by technology
[0003] At present, there are some preparation methods of polyimide / polytetrafluoroethylene composite film for cable and wire insulation, but the process is complicated, the cost is high, and the amount used in the production process cannot be accurately controlled, resulting in low comprehensive performance.
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[0039] In order to make the objects and advantages of the present invention clearer, the present invention will be further described below in conjunction with the examples; it should be understood that the specific examples described here are only for explaining the present invention, and are not intended to limit the present invention.
[0040] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention.
[0041] It should be noted that, in the description of the present invention, terms such as "upper", "lower", "left", "right", "inner", "outer" and other indicated directions or positional relationships are based on the terms shown in the accompanying drawings. The direction or positional relationship shown is ...
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The invention relates to a preparation method of a polyimide / polytetrafluoroethylene composite film for wire and cable insulation, which comprises the following steps: obtaining a polytetrafluoroethylene solution and a polyimide solution; adding a polytetrafluoroethylene solution into the reactor through a first feed opening, adding a surfactant into the reactor through a first feed opening, and stirring to form a hydrophilic polytetrafluoroethylene solution; casting the hydrophilic polytetrafluoroethylene solution into a film by casting film forming equipment to obtain a hydrophilic polytetrafluoroethylene film; enabling the first coating device to coat the two sides of the hydrophilic polytetrafluoroethylene film with an adhesive to form a viscous hydrophilic polytetrafluoroethylene film; and enabling the second film coating device to coat the viscous hydrophilic polytetrafluoroethylene film with a polyimide solution in a double-sided mode, performing drying, then putting the viscoushydrophilic polytetrafluoroethylene film into a soaking tank to be soaked, adding a first removing agent into the soaking tank through a second feeding port, and performing filtering and drying. Therefore, the insulating property of the polyimide / polytetrafluoroethylene composite film for wire and cable insulation can be effectively improved, the process is simple, and the cost is saved.
Description
technical field [0001] The invention relates to the field of preparation methods of plastic films, in particular to a preparation method of a polyimide / polytetrafluoroethylene composite film for wire and cable insulation. Background technique [0002] Polyimide (PI) is a material with excellent comprehensive properties. It is a kind of polymer material containing imide rings in the main chain. It has excellent heat resistance, low temperature resistance, solvent resistance, and self-lubricating properties. Properties such as resistance and flame retardancy. Polytetrafluoroethylene (PTFE) is a white waxy thermoplastic. The composition and structure of PTFE determine that it has the following characteristics: a wide range of high and low temperature applications, excellent corrosion resistance, excellent weather resistance, high insulation, high Lubricity, excellent surface non-stickiness, minimal water absorption, excellent thermal stability, non-toxic, and physiologically i...
Claims
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IPC IPC(8): H01B19/00H01B19/02H01B19/04H01B13/06
CPCH01B13/06H01B19/00H01B19/02H01B19/04
Inventor 黄平钦
Owner 扬泰氟(清远)电线电缆有限公司