Wet Strength Resins—Not All Are Created Equal...
From paper towels, tissues and filter papers to wallpapers, packing papers and corrugated boxes, many paper products can only fulfill their expected functions satisfactorily if they demonstrate adequate wet strength. What is a wet strength? The ability of paper to maintain a pre-determined strength—up to 50% of the dry paper strength, depending upon the application—after being saturated with a water solution is termed “wet strength.” Wet strength is especially important to the adequate performance of paper bags and containerboard products that are expected to transport foods or beverages which will cause the packaging to get wet due to the moisture content of the food itself, changes in temperature that induce melting and condensation, or environmental exposure to moisture. Minimizing the risk of packaging failure is critical to maintain product integrity throughout the handling timeline...
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