You Won t Believe These Things About Film Installation
Window film is a self-adhesive material that may be applied to new or existing glazing to solve a number of problems. Solar control, privacy, decorative and anti shatter films have been around for quite a while, specialist films for example anti graffiti and anti fog films are usually being commonly used in today's' market.
In its simplest form window film is a thin sheet of polyester, adhesive and after that a thin polyester backing liner. Additional sheets of polyester can be found on many films, two sheets of polyester is called two-ply, some security films will also be obtainable in three ply. A metalized or dyed layer can sometimes be added between these sheets of polyester to add colour or tint as well as a scratch resistant coating can be found on a large number of films to protect from every day wear and tear.
Window film installation can be fitted to most type of glazing, they can all be fitted to flat glass but some films can also be fitted to raised or patterned glass determined by the flexibility of the film as well as the sort of pattern, if the pattern is too raised the movie may not be successfully installed, however there will likely be a flat side to all patterned glass. Another problem sort of glazing can be compound curves found on the windscreens of cars. It is because the glass is curved in two directions, the movie may be effortlessly applied to glass curved in one direction but if it is a compound curve you will probably need to heat shrink the film, specialist car window tints are accessible for this, they are commonly a thinner material and are specially made to be heat shrinkable more so than a standard window film.
You will find three technologies which provide different performance characteristics, these are; dyed, deposited and sputtered.
Dyed films are often on the cheaper end of the market but these films should not be disregarded, as there are some excellent dyed films on the market. The bottom end of the marketplace is glue tinted, glue tinted films have the dye mixed with the adhesive (scratch resistant coating (not absolutely present), polyester sheet(s), adhesive mixed with dye, backing liner). These are usually sold on the Asian and South American market but remain sold in Europe. These films are not usually particularly colour stable, as there's very little protection for the dye, as such also they can fade quickly. Since the dye is mixed with the adhesive the colour is not always uniform and the colour may be moved during installation.
A far better sort of dyed film is one which has the dye sandwiched inside two sheets of polyester, this film is much more colour stable as it is protected through the polyester sheets, this actually also provides no problems when installing as the adhesive is clear and there can be no colour shift. These films can frequently be supplied with as much as ten years warranty.
Among the common misconceptions with dyed film is the fact that it can disperse heat in to the property. As dyed films can absorb heat and it is fitted inside it's easy to view why people think this. However most of the heat is held within the glass and because the wind speed outside is so much greater than inside (wind speed averages over 15mph outdoors but only ˝ mph indoors) the external air draws the heat outside. Some heat is leaked in to the property but most heat is dissipated outdoors.
As double glazed units allow no air movement in between the glass, interior dyed films are not always appropriate for this kind of glazing and also you should ensure that you check on it's suitability before installing as installation on the wrong sort of glazing may cause thermal cracking.
Deposited window film is created by drawing film by way of a tank of metal ingots (usually aluminum or nickel chrome, but sometimes copper). Pressure is then reduced within the tank creating a vacuum and also the tank is filled with argon gas. When the tank is filled with gas the metal ingots are the heated, the heat causes the metal to give up particles, which in turn migrate to the movies surface within an even layer. The density of the metal deposits can be controlled effortlessly by altering the speed of the film throughout the chamber.
Sputtering will be the most complicated process for creating window film. This process can also be completed in a vacuum however the metallization in the process is achieved at atomic level. Electromagnetic fields direct streams of ions from a chemically inert gas (usually Argon) towards the metal. This ion bombardment (often known as "atomic billiards") causes groups of atoms to dislodge in small bursts and scatter uniformly through the film.
The benefits of sputtering are that around 30 different types of metals may be used; various metals may be chosen to subtract specific radiation from the solar spectrum. The metalized coating will be much lighter; a sputtered metal may be created in a layer one-hundredth of the thickness of a human hair.
The result of sputtering is a highly reflective layer which has very little mirrored effect, heat absorption or colour shift and as such warranties are often a decade to lifetime. Sputtering will be the most expensive process to achieve and as a result sputtered window film will be at the larger end of price range
