This production solution is commonly employed in the packaging industry where the end-products require multi-functional properties, such as high tensile strength and high gas permeability. These are generally referred to as barrier films. The laminate construction can become rather complicated due to the nature of the specific application. A typical laminate used in the medical packaging industry, for example, may be multi-layer composite containing films of polyester / polyethylene / metal foil / polyethylene.
The variety of modern flexible packaging products that are available today would not be possible without modern adhesive systems. The evolution of the packaging industry has closely matched the development of new adhesive materials and production processes. These trends have led to high quality and technically demanding packaging structures required by the consumer.
1. The film / product compatibility.
2. The lamination process.
3. Machinability on the packaging line.
4. Heat seal characteristics that matches the requirements of the packaging line.
5. Storage (Shelf life ), handling and transportation conditions.