Energy-shielding plastics film

Abstract

A plastics film with improved energy-shielding properties, suitable for application on a transparent or translucent surface, such as glass, and which is at least 50% transparent for visible light, further characterized in that it includes at least one plastic carrier layer with on top thereof as a functional layer a metallic layer consisting of antimony and / or arsenic together with indium and / or gallium, wherein the plastics film contains a total of indium (In), gallium (Ga), antimony (Sb) and arsenic (As) together, which are present as an alloy, such as indium andmonide, gallium andmonide, indium arsenide, indium gallium arsenide and / or gallium arsenide, of at least 4.0 ppm by weight and at most 25.0 ppm by weight. A glass plate to which the film is attached, is described as are objects provided with the glass plate. Methods are described for the production of the film, the glass plate and the objects.

Description

[0001] The present invention relates to the preparation of transparent or translucent surfaces such as vehicle or building glass surfaces for less energy transfer. The present invention is particularly directed to improved light transmissive plastic films that can be applied to such surfaces. The invention is further directed to the use and production process of these plastic films and to the use of special materials for the production of energy-shielding transparent plastic films. Background technique [0002] Due to the increasing human demands for a more comfortable life, including better temperature control in direct contact with the environment, and as the energy required to control said climate faces scarcity and the effects of the greenhouse effect and the resulting ecological footprint and user carbon The concept of enhanced emissions, insulating surfaces, for example in vehicles and buildings, has become popular. Therefore, for the above reasons, there is a permanent...

AI Technical Summary

Problems solved by technology

The disadvantage of these films is that the absorbed radiation is converted into heat in the film

Thus, this absorption may lead to a localized temperature increase, which is transferred to the substrate on which the film is applied

For many substrates such as glass, local temperature rises lead to high stresses and even breakage of the glass

The second disadvantage is that the absorbed heat, although transmitted in a very uniform manner to the interior, can still locally produce a considerable temperature rise, which can still be perceived as unpleasant

Although these films reflect as much as possible radiation mainly in the near-infrared region, there is still an excessively high degree of absorption not only in said region but also in the ultraviolet region and the long-wavelength infrared region, likewise with the attendant problem of localized heating still far from being resolved

[0012] For this reason there remains a need for energy shielding plastic films which reflect well but are at the same time heated less by incident radiation and by absorbed radiant energy from the full radiative zone

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