TAPPI TIP 0304-69:2017
$14.95
Understanding Wet Strength: What Are MRA, WRA, and WPA?
| Published By | Publication Date | Number of Pages |
| TAPPI | 2017 | 4 |
To determine the "wet strength" needs of a corrugated box plant, one must first define the level of "wet strength" needed. Generally, the industry has accepted three levels of "wet strength" adhesive.
1.MRA – moisture resistance, used for the lightest possible applications.
2.WRA – medium level of water resistant performance.
3.WPA – highest level of water protection performance.
TAPPI TIP 0304-69 will identify the key characteristics of each type of "wet strength" adhesive and when it would be used. Proper test methods to determine the level of water resistance of a particular box will be discussed.