Loading patent…
AssigneeTetra Laval Holdings & Finance S.A.
InventorDominique Chatard
Estimating the term…
Described is a method of measuring the permeability of a coating (3) on a plastic wall (1) to low-molecular gases, wherein the diffusion coefficient and/or solubility coefficient of the coating (3) with respect to the low-molecular gases is an order of magnitude lower than that of the plastic wall (1), wherein the space (4) on the coating side is subjected to the action of a first fluid (5) and is flushed through therewith until only said first fluid (5) is in the space. Also described is a device for carrying out the method. To measure the barrier property of the coating (3) it is provided that the first fluid includes a test medium (5), a component which can diffuse into the plastic wall (1) and be absorbed there, after the space (4) is flushed the test medium (5) is removed therefrom, thereafter the coated space (4) is subjected to the action of an extraction medium (7) in which the component is well soluble and can be measured, and the concentration of the component in the extraction medium (7) is measured.
A method of measuring the permeability of a coating on a plastic wall (1) to low-molecular gases, for example oxygen, wherein the diffusion coefficient and/or solubility coefficient of the coating with respect to the low-molecular gas is approximately an order of magnitude lower than that of the plastic wall (1), in which the space (4) only on the coating side is subjected to the action of a first fluid (5) and is flushed through until substantially only said first fluid (5) is in said space (4), characterised in that
Dependencies are inferred from the claim text.