There are many kinds of foams to become laminated in packaging applications. Custom packaging and Laminating machine using the bonding questions regarding hot melts and hot melt equipment each day.
The range of foams and substrates these are laminated to require numerous kind of hot melts and several types of hot melt systems to use these hot melts.
A number 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 and others remain “Open” and might be assemble a long time after the application form.
Most customers consider the usage of hot melt for bonding Hot met pur laminating machine as these products accelerate the development process. The typical approach to applying hot melts is at bead form and unfortunately from a stick gun in many cases. Usually the hot melt in bead from burns in to the foam decreasing the laminated region of 03dexopky in between the two substrates.
Optional types of hot melt application which are used worldwide by foam fabricators are spray, swirl, fiberization and rollcoating. These techniques let you use a longer open time hot melts very fast to your temperature sensitive foams or Cutting press and never impact the surface negatively. The longer open time simply gives you more time to work with the adhesive as it is being applied in the thin pattern to foam.
All substrates should be evaluated with all the proposed hot melt and application strategy to insure how the adhesive and application system meet you production and quality requirements.