To determine the wet strength needs of a corrugated box plant, we must first define the level of wet strength needed. Generally, our industry has accepted three levels of wet strength adhesive.
Moisture Resistant (MRA) used for the lightest possible applications.
Water Resistant (WRA) medium level of performance.
Waterproof (WPA) highest level of performance.
We will attempt to identify the key characteristics of each type of wet strength adhesive and when it would be used. We will also discuss proper test methods to determine the level of water resistance of a particular box.
Plastics piping systems - Guidance for the installation inside buildings of pressure piping systems for hot and cold water intended for human consumption; German version ENV 12108:2001
Fruit and vegetable juices - Determination of the stable oxygen isotope ratio (<(hoch)18>O/<(hoch)16>O) of water from fruit juices - Method using isotope ratio mass spectrometry; German version ENV 12141:1996
Fruit and vegetable juices - Determination of the stable hyydrogen isotope ratio (<(hoch)2>H/<(hoch)1>H) of water from fruit juices - Method using isotope ratio mass spectrometry; German version ENV 12142:1996
