Description of performance indicators of protective film for building window glass

- Aug 27, 2020-

Everyone is relatively unfamiliar with architectural window glass protective film. Its performance indicators include solar energy absorption rate, solar energy barrier rate, shielding coefficient, U value, etc. According to different uses, performance requirements are different. Generally speaking, its main indicators are visible light transmittance, visible light reflectance, heat insulation rate, and ultraviolet blocking rate.

The main indicators for the performance index description of the architectural window glass protective film generally include tensile strength, peel strength, impact strength and tear strength. The solar absorption rate is the percentage of solar energy absorbed by the glass/film composite layer. The absorbed solar energy can radiate to both sides of the glass protective film composite layer at the same time. The side with the higher air flow rate will radiate more energy.

The total solar transmittance is the sum of the part of the solar energy passing through the glass/glass window film protective film composite layer and the absorbed solar energy radiating to the inside. The unit of measurement for the insulation rate is the heat passed per square foot per hour. The solar energy blocking rate is the heat insulation rate, which is the sum of the solar energy reflected by the glass protective film composite layer and the absorbed solar energy radiated to the outside.

The glass protective film uses a polyester substrate (PET), one side is coated with an anti-scratch layer (HC), and the other side is an installation adhesive layer and a protective film. PET is a material with strong durability, strong moisture resistance, high and low temperature resistance. It is clear and transparent, metallized coating, magnetron sputtering. Various processes such as interlayer synthesis have become films with different characteristics.

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