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Technologies

Cap Seal liners

In the bottling industry, cap seal liners are induction or pressure-sensitive liner discs that close and seal containers with an aluminium foil liner and a layer of polymer compatible with the material of the sealed package.

The polymers used most for packaging are:

  • Polyethylene (PE), both low- and high-density.
  • Polypropylene (PP), partially crystalline.
  • Polystyrene (PS), crystal, high impact, expanded or extruded.

The seal liner may be supplied in different sizes, materials or thicknesses, depending on the requirements of the cap and the container:

  • Bulk: in boxes, adapted to any closure seal.
  • Bagged and faced, to facilitate the bottling company’s automation.
  • On rolls: for large quantities, adapted to the needs of the bottling factory.

The liners can also be printed with the wording required by the customer. The most common are:

  • ‘Sealed for your protection’.
  • Tamper-evident seal.
  • Airtight closure.
  • Airtight seal.

Used to prevent leaks, ensure the tightness of the content, render the product tamper-proof and increase safety, cap seal liners are highly regarded and used in the following areas:

  • The pharmaceutical industry.
  • Cleaning companies.
  • The entire cosmetics sector.
  • Agrochemical treatment companies.
  • Food and drink companies.
  • The plant protection sector.
SM Tecnic
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