Flexible packaging is an ensemble of plastic films bonded together, forming a pouch or a package. This packaging solution is becoming more and more present on the shelves, because it attracts the eye while offering many advantages.
In terms of production, it’s possible to glue film together with just heat (the different plastic films “melt” and stick), or using an adhesive. The other important decision therefore is the selection of the adhesive. Acrylic or rubber-based? Both have different properties and can meet different needs.
Acrylic is the most widely used adhesive today. Its color and transparency are durable and, it has good temperature resistance. Rubber-based adhesives are also called “hot melts”, as they are heated and melted before being applied to the substrates. Initially uncommon in the world of flexible packaging, they are gaining popularity. The bonding is stronger and more resistant with this type of adhesive, and can withstand water.
In any case, keep in mind how the product will be used and determine the necessary resistance of the package. Does the product have to go into the microwave? At what temperatures will it be exposed? What about the humidity? Should the adhesive remain transparent? Some may whiten or become yellow when exposed to sunlight or moisture.
Choosing the right adhesive is therefore crucial to your packaging, as is the choice of plastic film. Acrylic and rubber-based adhesives have their advantages. Choosing the right one is the first step on the road to success for your flexible packaging.