Sealing Technology: A Look at Recent Developments

One of the distinct areas in which packaging technology has improved over the last couple of decades has been in the use of micro-thin films and coatings in a variety of interesting and useful ways.

Films are being used to increase the barrier properties of containers to make them more resistant to gasses, light, and extreme temperatures, and are also being introduced in the packaging space as liner additions, that serve the two-fold function of better preserving the product contained within and providing a simple tamper evidence solution that safeguards against tampering or manipulation.

Kornelis uses several types of seals:

  • Monoliners (single material)
    • Alufoil silver or gold printed glue liner
    • PP foil white or gold printed glue liner
    • Pergamin paper white glue liner
  • Duo liners (multilayer taggers or liners)
    • Glue tagger cardboard-alu-pergamin
    • Glue tagger cardboard pergamin
    • Glue liner white foil OPP-Kraft
    • Induction heatseal liner ( IHS ) for glass
    • Induction heatseal liner ( IHS ) for PET
    • Induction heatseal liner ( IHS ) for PP/PE
  • Liners with pull tab
    • IHS with pull tab for PET and PE and PP
    • Glue liner PP with pull tab for PET and glass
    • Sprinkle liner OPP-Kraft
  • Foam liners
    • PP foam liners
    • PE foam liners

With the advent of new films and coatings, each of these seal types has benefited immensely. They now serve more than a simple TE function, they can be used as effective barriers against a variety of external stimuli with numerous added benefits. First and foremost, seals can be much thinner than they used to be thanks to the use of films, meaning they take up less space between the closure and container. This translates into a better packaging fit. Almost counter-intuitive to our way of thinking, the seals are also generally stronger than they used to be even though they're thinner, making them harder to puncture and safer to use. Also, though the difference in weight of modern film seals on one container is only marginally less than what has thus far been used, that difference can add up to savings on transport costs and material purchases when talking about a run of tens of thousands of items.

What Kornelis has tried to do is take advantage of new technologies with regard to materials to make seals thinner, stronger, and generally better than they've ever been.