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Beauty, Wipes and Preservation
By: Jeff Falk
Posted: November 7, 2006, from the November 2006 issue of GCI Magazine.
page 3 of 6
“Wipes, by their nature, tend to be highly susceptible to the growth of mold. The binders used in the manufacture of the non-woven substrate can also inactivate some preservatives,” said Linda Sedlewicz, country manager—U.S.A., Schülke & Mayr. “Care must be taken that the preservative system protects not only the liquid portion of the system, but the entire system, including the liquid and the impregnated non-woven substrate, from a broad spectrum of possible microbial contamination.”
Because non-woven wipe products are particularly susceptible to fungal infiltration, the preservative system must have sufficient antifungal activity.
International Specialty Products’ Liquid Germall Plus, according to the company, is well-suited for wipe applications. The preservative’s blend of diazolidinyl urea and IPBC allow for low-use levels with broad spectrum efficacy. In addition, the blend is water soluble at recommended use levels. The principal application of the company’s Suttocide A is in wipes. The derivative of glycine provides protection against bacteria and fungi, and Suttocide A’s solubility, according to Orofino, positively benefits its functionality in wipe applications.
“The effectiveness of the preservative(s) in wipe products may be affected by the nature of the fabric non-woven itself, natural or synthetic,” said Lindstrom. “There is a possibility of some preservatives becoming chemically or physically bound to the fiber surfaces and possibly reducing their antimicrobial activity. Preservative selection must take this into account.”
Packaging also must be considered in choosing and testing a preservative. “Large, multiple-use containers are more easily contaminated, as the consumer has more access to the contents,” said Sedlewicz. “Single-use packages need only be protected from contamination that may be introduced during manufacturing.”