Maintaining structural integrity is a major concern when developing plastic containers used to hold biocides. A biocide is a chemical or biological substance or a microorganism that can destroy, render harmless or wield a controlling effect on harmful organisms; examples include herbicides, insecticides, antibiotics and antibacterials. Microbial growth, such as mold, mildew, algae and even yeast, can impair untreated plastic containers.
Damage can be minimized by mixing antimicrobial additives into the plastic resins during compounding or in a masterbatch during the molding process. Adding an antimicrobial helps the product resist polymer degradation, unpleasant odors and unappealing discoloration.
While antimicrobial treatment can benefit many plastic containers, it is a critical component in certain industries.
Medical and pharmaceutical products require antimicrobial efficacy, as do food-storage items. Antimicrobial additives also protect plastic containers for cosmetics, fabrics and other consumer items prone to microbial contamination or biofilm formation caused by microorganisms.
Polyethylene Terephthalate (PET) plastic containers, commonly used in the beverage and food industries, can incorporate an antimicrobial additive such as MicroBlok®, produced by Plastics Color Corp. MicroBlok® has been proven effective in consumer-contact applications, including containers, because it inhibits the growth of bacteria on treated surfaces, reducing stains, odors and product deterioration. MicroBlok passed the ISO 22196:2011 test that measures the growth of bacteria, fungi, molds and other microbes on the tested plastic substrates.
Plastics Color offers two antimicrobial protection options, MicroBlok S (silver based) and Z (zinc based). Project managers evaluate a container’s intended use, environment and expected service life, as well as performance and durability requirements, to determine which one is best suited to the product. The chosen additive is then engineered into resins during the compounding process, eliminating the need for additional material modifications.
MicroBlok helps inhibit the advance of bacteria, fungi, molds, yeasts and other microbes on treated surfaces, which greatly reduces stains, odors and product deterioration that can occur in containers that hold biocides. Plastics Color Corporation has been a leader in the testing and development of plastic additives that improve the safety and effectiveness of plastic container products. To learn more, visit the Plastics Color website.