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Barrier and sensory properties of materials


Certech studies the behaviour of materials at every moment of their life cycle.


These studies are focussed on the understanding of migration, permeability, interactions and sorption between a plastic packaging and their content (food, cosmetics, pharmaceutical and automobile industry).


Several parameters have to be taken into account for the choice of a material for packaging:

    - The materials must comply with specific properties, since they are at the interface between an external environment and a protected product.

    - Light components may be emitted by the material and they can modify the final properties of the product (change of flavour or odour, loss of organoleptic and nutritional properties, loss of permeability, contaminations, bacteriological issues...)


Certech provides its expertise for :

  • The analysis of NIAS chemicals (Non-Intentionally Added Substances)

  • The investigation of the origin of flavours and odours defaults, through the correlation of sensorial and chemical analyses. Certech service range includes the identification and quantification of volatiles components (solvents, residual monomers, noticeable chemicals such as Acetaldehyde which is emitted from PET ...), and of chemicals resulting from the degradation of resins or additives

  • The impact of the experimental conditions during the synthesis or the manufacturing, as well as post-treatment steps (coating, sterilisation ...), storage time and the possible interactions with the product are investigated

  • The research on material permeability properties, using screening tests as well as adapted tests regarding the evaluation of barrier properties against odours, specific gases and VOC (Volatile Organic Compounds).

  • The analysis of heavy metals in packaging

  • The development of low-odour materials, with no impact on the packaging content

  • The compounding of barrier materials