Sign & Digital Graphics


Issue link:

Contents of this Issue


Page 98 of 128

84 • WRAPS • 2 0 1 7 TOOLS & EQUIPMENT Pressure Activated Adhesives—Everything changed with the wide adoption of pressure acti- vated adhesives. PAAs create their bonds using ini- tial pressure and flow, unlike other adhesives that rely on chemical reactions or curing processes. For wrap installers, this technology has dramatically increased the ease of installation, allowing them to find the perfect placement of a film without having it prematurely adhere to a substrate. Initial Tack—One of the most noticeable and important traits that differentiate films from one another is initial tack. This is the first applied pres- sure that sets a film to a surface. Some adhesives offer low tack properties, which can result in easy repositionabil- ity, but difficult in short term and long-term adhesion. Other vinyl films may provide high tack, which can create a strong initial bond, but frequently limit an installer's ability to successfully snap the material back up. This partisan split is best met in the middle, where optimized initial tack can offer the best of both worlds. Using a thumb test, you can see the difference between the differ- ent tack qualities of a film. Each adhesive liner is composed of active groups and soft segments that combine to provide a bal- ance between repositionability (snap-up capability) and long-term bonding. As you push a film onto a substrate, it may feel like it lacks proper hold. A high-quality product offers adhesive properties that allow for give-and-take during installation, but a lasting bond—especially when enhanced by post- heating in deep channels for example. Over time, installers can sometimes get used to the rigors of working with low and high initial tack, but it's far easier and faster when it's in between. Non-Visible Air Release—Nothing looks worse than a wrap installation chock-full of bubbles. Air- release technology lends a unique characteristic to a film's adhesive properties that enables fast appli- cation with very few air bubbles. The quality of this technology has vastly improved over time, and was first introduced to the market by 3 M as Comply Technology. This advancement allows installers to remove bubbles more easily, which leads to a better-looking wrap that features stronger bonds. When air-release technology was first introduced to the market, the channels in which air escaped were An installer releases the liner from the wrap film as it is initially adhered to the side of a vehicle. Thanks to the adhesive technology, he'll be able to reposition the material before final application. Wrap film is expertly positioned around the con- tour of a vehicle, showcasing a versatile adher- ence to the surface that will allow repositioning. High-quality initial tack is an essential adhesive feature that allows installers to reposition a vinyl film to the perfect location. Installers line up wrap film on the hood of a Polaris Slingshot, prior to installation and removal of the liner.

Articles in this issue

view archives of Sign & Digital Graphics - WRAPS '17