How This New University Graduate Changed Opinions On Building Film
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 are already around for a long time, specialist films such as anti graffiti and anti fog films also are being generally used in today's' market.
In its simplest form window film is a thin sheet of polyester, adhesive and then a thin polyester backing liner. Additional sheets of polyester may be found on many films, two sheets of polyester is called two-ply, some safety films are also available 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 may be found on nearly all of films to protect from daily wear and tear.
Window film may be fitted to most type of glazing, they can all be fitted to flat glass but some films could also be fitted to raised or patterned glass depending on the flexibility of the film and also the type of pattern, in the event the pattern is too raised the movie may not be successfully installed, however there is normally a flat side to all patterned glass. Another problem type of glazing can be compound curves found on the windscreens of cars. This is because the glass is curved in two directions, the film may be easily applied to glass curved in one direction but if it is a compound curve you will probably need to heat shrink the movie, specialist car window tints are accessible for this, visit these guys are usually a thinner material and are specially made to be heat shrinkable more so than a standard window film.
There are actually three technologies that offer different performance characteristics, these are; dyed, deposited and sputtered.
Dyed films are usually on the cheaper end of the market but these films should not be disregarded, as you will find some great dyed films in the marketplace. The bottom end of the marketplace is glue tinted, glue tinted films possess the dye mixed with the adhesive (scratch resistant coating (not always present), polyester sheet(s), adhesive mixed with dye, backing liner). They are usually sold on the Asian and South American market but will still be sold in Europe. These films are not usually particularly colour stable, as there's very little protection for the dye, as such they may fade quickly. Since the dye is mixed with the adhesive the colour is just not always uniform as well as the colour may be moved during installation.
A greater type of dyed film is just one that has the dye sandwiched inside two sheets of polyester, this film will be much more colour stable as it is protected by 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 around a decade warranty.
One of the common misconceptions with dyed film is that it can disperse heat into the property. As dyed films can absorb heat and it is fitted inside it is easy to find out why people think this. However most of the heat is held within the glass and since 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 into 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 ideal for this type 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 will be the heated, the heat causes the metal to quit particles, which in turn migrate to the films surface in an even layer. The density of the metal deposits can be controlled easily by altering the speed of the movie over the chamber.
Sputtering will be the most complicated procedure for creating window film. This process is also accomplished in a vacuum but 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 advantages 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 is a lot lighter; a sputtered metal can 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 therefore warranties tend to be a decade to lifetime. Sputtering is the most expensive process to achieve and as a result sputtered window film will be at the larger end of price range
