A kind of four-silver low-radiation energy-saving window film and preparation method thereof

Abstract

The invention relates to a four-silver low-radiation energy-saving window film and a preparation method thereof. A film layer structure of the window film sequentially comprises a flexible transparent PET substrate layer, a first high refractive index layer, a first metal oxide layer, a first silver alloy layer, a first barrier layer, a second high refractive index layer, a second metal oxide layer, a second silver alloy layer, a second barrier layer, a third high refractive index layer, a third metal oxide layer, a third silver alloy layer, a third barrier layer, a fourth high refractive index layer, a fourth metal oxide layer, a fourth silver alloy layer, a fourth barrier layer and a fifth high refractive index layer from inside to outside. According to the window film, by reflecting infrared light and ultraviolet light by four silver alloy layers, a refractive index matching relationship is formed between the four silver alloy layers and five high refractive index layers, and with matching of a thickness parameter, a color of the window film is observed to be grass green in the sun, thus the window film has superexcellent visual effect. Meanwhile, the grass green window film is also excellent in light transmission performance, heat insulation performance and oxidation resistance.

Description

technical field [0001] The invention relates to a sticking film attached to window glass of automobiles, buildings, etc., in particular to a four-silver low-radiation energy-saving window film and a preparation method thereof which is grass green in sunlight. Background technique [0002] The window glass of automobiles, buildings, etc. often needs to be attached with a film, usually called a window film, to provide functions such as heat insulation and UV protection. At the same time, the window film with excellent performance can also provide good visible light transmittance, so that the outside of the window can be clearly observed from the inside of the window glass. Among them, the low-e window film, also known as Low-E window film, is formed by depositing a low-e film layer on the surface of a flexible transparent substrate; the low-e window film has a high light transmittance to visible light, and has a certain With high reflectivity, it is a thin film product with t...

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Problems solved by technology

[0003] At present, the traditional low-e energy-saving window film has some shortcomings such as single color and poor heat insulation performance, and grass green window film with strong decorative effect is even rarer.

At present, most of the window films are heat-reflective coating window films with poor energy-saving performance, which have poor structural stability, poor heat insulation effect, and short service life, which is not conducive to wide-scale promotion of products.

[0004] In the industrial production of low-radiation and energy-saving window films, the magnetron window film needs to be coated and compounded in the later stage of production, which makes the window film inevitably contact with air, which causes its oxidation, and the temperature changes during transportation , will also accelerate the oxidation of the window film, directly affecting its service life

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