Volume-13 (06/2006)

Correlation of Receding Water Contact Angle Data with Moisture Vapor Transmission Rate (MVTR) for Corona Treated Polypropylene Packaging Film

Polypropylene film is widely used to package foodstuffs including meats, crackers, cookies, etc. Two of the major issues in packaging film are moisture vapor transmission rate (MVTR) and printability. In this work we study polypropylene film with varying levels of corona treatment - which was applied to increase printability by increasing surface energy.

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Paper wettability by water-based paints

As a result of the increasing abandonment of the use of organic solvents in paints and use of water instead the wettability of the paper has become an important quality assurance factor. In an investigation the surface free energies of the main constituents of paper and their general wettability were demonstrated by using wetting envelopes, a surface free energy plotting method.

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