A kind of method for preparing magic color reflective film by vacuum evaporation process

Abstract

The invention discloses a method for preparing a magic color reflective film through a vacuum evaporation process. A plated plant base film is placed in a vacuum evaporation chamber, then main drum conduct low temperature cooling, a molybdenum boat where evaporation target materials are arranged is placed in an evaporation tank, it is ensured that the distances between all evaporation target materials and the bottom end of the main drum in the center are different, the evaporation tank is covered with a cover plate to be sent into the evaporation chamber, and the evaporation chamber is vacuumized; the evaporation target materials are heated to a melting point to be vaporized, the cover plate of the evaporation tank is opened, the plated plant base film is controlled to move in the evaporation chamber at the constant speed, and evaporation operation is carried out step by step; and after evaporation is completed, the equipment is stopped. By means of the method, the magic color reflective film finally obtained by the method has the transparent surface and is suitable for deep processing at the later stage, meanwhile, the metal film is not prone to falling, and the color effect can be generated after the film meets light in a dim environment.

Description

technical field [0001] The invention relates to the technical field of reflective film, in particular to a method for preparing a magic color reflective film by a vacuum evaporation process. Background technique [0002] The production process of ordinary reflective plant film is generally as follows: firstly, glass beads of different particle sizes are adhered to the glued PET or PE film, and glass beads with a refractive index of 1.90-1.93 are generally used at the same time. To enhance the reflective effect of the reflective film, a metal film is generally vacuum-evaporated on the surface of the plant film, and the metal film is mostly made of aluminum film, but the ordinary aluminum film will cause the film surface of the reflective film to be non-transparent, and it is difficult to use it as a semi-finished product later. According to the needs of customers, it can be processed into colorful reflective material products of other colors. In addition, for ordinary iridesc...

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Problems solved by technology

[0002] The production process of ordinary reflective plant film is generally as follows: firstly, glass beads of different particle sizes are adhered to the glued PET or PE film, and glass beads with a refractive index of 1.90-1.93 are generally used at the same time. To enhance the reflective effect of the reflective film, a metal film is generally vacuum-evaporated on the surface of the plant film, and the metal film is mostly made of aluminum film, but the ordinary aluminum film will cause the film surface of the reflective film to be non-transparent, and it is difficult to use it as a semi-finished product later. According to the needs of customers, it can be processed into colorful reflective material products of other colors. In addition, for ordinary iridescent films, two or more transparent thermoplastic resins with different refractive indices (the difference in refractive index is at least 0.03) are usually tested by ABABAB... .. or ABCABCABC... combined to form at least 30 layers of uniform and parallel alternating core layers. This kind of iridescent film formed by using multiple resins has low strength, poor reflective performance, and complicated processing technology.

In addition, the ordinary transparent dielectric film is to directly vapor-deposit the zinc sulfide target on the ordinary plastic film such as PTE, PP, OPP film, and the dielectric film obtained in this way has poor reflective effect, while the traditional aluminized plant film has good reflective effect, but Difficult to achieve transparent effect

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