There are lots of types of foams being laminated in packaging applications. Custom packaging and Laminating machine with the bonding queries about hot melts and hot melt equipment daily.
All the different foams and substrates they are laminated to require a number of form of hot melts and different kinds of hot melt systems to make use of these hot melts.
A few of the standard hot melts used are pressure sensitives (PSA) , polyolefins (APAO), ethyl vynil acetates (EVA). Each hot melt offers different bond capabilities. Each hot melt has different viscosities and softening points for temperature resistance requiring different application methods. Some must be applied at the higher temperature and laminated fast among others remain “Open” and will be assemble long after the applying.
Most customers consider the application of hot melt for bonding TPU laminating machine as these products accelerate the development process. The regular means of applying hot melts is in bead form and unfortunately from a stick gun in many cases. Often the hot melt in bead from burns into the foam decreasing the laminated section of 03dexopky involving the two substrates.
Optional methods of hot melt application that are used worldwide by foam fabricators are spray, swirl, fiberization and rollcoating. These methods let you use a longer open time hot melts very fast into a temperature sensitive foams or Swing Arm Cutting Machine and never modify the surface negatively. The more open time simply gives you more hours to work with the adhesive since it is being applied inside a thin pattern to foam.
All substrates must be evaluated with the proposed hot melt and application strategy to insure the adhesive and application system meet you production and quality requirements.