CJK Packaging is a Kautex Textron UK distributor and industrial synthetic plastic packaging manufacturer
EXPERTISE IN PLASTICS 		ISO Registered Company Image ISO Registered Company Image ISO Registered Company Image
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CJK Packaging Ltd.
Bridgeholme Ind. Estate
Chinley
High Peak
Derbyshire
SK23 6DX
United Kingdom

Tel:
+44 (0) 1663 750222
Fax:
+44 (0) 1663 750333
THE KAUTEX BARRIER TECHNOLOGY
Principle
Plastics, especially the polyolefin (PE) group have many useful properties but are not completely impermeable to very volatile substances and oxygen. This means that molecules of the contents can migrate outwards through the vessel walls and that oxygen can migrate inwards to the contents. This process is known as permeation.

The Kautex barrier methods make HDPE in particular virtually impermeable to hydrophobic, aromatic and aliphatic substances.

Among the main areas of application are:
  • Chemical products with high permeation rates,
  • Fuels, domestic fuel additives,
  • Colours, lacquers, solvents,
  • Crop protection agents,
  • Oxygen-sensitive substances.

    • Arrangement of bottle wall layers
    Coextrusion blow moulding
    Tailor-made combinations of materials with from 3 to 6 layers of barrier materials in accordance with the customer's requirements.
    The layers used in the two most common material combinations:
    HDPE ---- HV - EVOH - HV ---- HDPE
    HDPE ---- HV - PA (inside)

    HDPE = the container wall.
    HV = coupling agent between HDPE and the barrier material.
    EVOH (ethylene vinyl alcohol) and PA (polyamide) are the barrier materials most often used.

    Enlarged cross-section of bottle wall
    Selar technology
    Selar contains PA (polyamide) as barrier material.
    During the extrusion process selar is worked into the HDPE carrier mass in such a way that overlapping sheets of PA are formed; these are bound to the HDPE with the coupling agent.
    This labyrinth consisting of uncountable PS sheets is an effective barrier.

    Enlarged cross-section of bottle wall
    Fluorination
    In this method gaseous fluorine is led into the hollow body during the blow moulding process or the finished hollow body is treated with fluorine in a vacuum chamber. Fluorine reacts with the HDPE surface and forms an effective barrier which is similar to Teflon.