A family of antimicrobial acetal copolymers (POMs) includes two injection-molding grades and one for extrusion.
The Hostaform and Celcon POMs greatly inhibit bacterial and fungal growth in warm, moist environments compared to conventional acetals. A 25-hr test at 35°C (99°F) on the injection-moldable Anti-Crobe AM90S Plus, gave a log 4 reduction in bacterial activity within 5 hr. The other injection-molding grade, Anti-Crobe AM90S, had a similar action within 24 hr. These results indicate that Anti-Crobe AM90S Plus is suitable for rapid bacterial control, while Anti-Crobe AM90S is a candidate for less-demanding situations. The antimicrobial formulation in these grades is present throughout the polymer matrix, not just on the surface. It will not migrate significantly nor abrade or scratch off. The antimicrobial polymers comply with FDA regulations for direct food contact, meet the NSF 61 Potable Water standard, and satisfy applicable EPA regulations. They are naturally white and can be tinted as needed.
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