The principle of volatile corrosion inhibition is by using VCI, volatile corrosion inhibitor which can be evaporated under normal temperature so as to achieve saturation in the closed environment; VCI molecules are absorbed onto the metal surface to form a transparent protection film of several molecules thick after complicated physical and chemical reactions. This transparent protection layer is water proof, difficult to be dissolved and thus, can stop further corrosion. Evaporated VCI molecules can reach anywhere in the package with best anti-rust performance. VCI plastic material is manufactured by polyolefin resin with VCI under processes.

Volatile corrosion inhibiting film testing should adopt US military specification MII.PRF-22019D “Barrier Materials, Transparent, Flexible, Sealable, Volatile Corrosion Inhibitor Treated” and other domestic and international standards.

Whether the thickness of VCI plastic film is even or not is the basic for VCI film and its performances. Uneven thickness would affect the tensile strength, permeation of different parts of the package; and would affect the following processing. Thickness testing methods are varied. For VCI plastic film thickness measurement, ISO 4593 and GB/T 6672-2001 are applicable.

Labthink PARAM CHY-C2 and CHY-CA Thickness Testers are both high precision thickness testers for VCI plastic film thickness testing with the resolution upto 0.1um. Labthink PARAM CHY-CA Thickness Tester, besides its high precision, high efficiency and other characteristics and functions to similar PARAM CHY-C2, is equipped with automatic feeding system to satisfy the constant and effective testing requirements of the clients with greater testing efficiency.

Labthink, the excellent provider of testing instruments and testing services, is devoted to provide most excellent and complete quality control solutions for pharmaceutical, foodstuff, cosmetics, packaging, printing, adhesive, automotive, petrochemistry, environment, biology, new energy, construction, aviation and electronic industries worldwide.

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