Antimicrobial composites, films, labelstocks and labels
View Patent ↗This invention relates to antimicrobial composites, films, labelstocks and labels. The antimicrobial composites comprise a mixture of (A) a terpolymer prepared from a mixture comprising (i) an olefin, (ii) at least one copolymerizable comonomer comprising ethylenically unsaturated organic acids or esters, vinyl esters of saturated carboxylic acids and mixtures of two or more thereof, and (iii) carbon monoxide, and (B) an antimicrobial composition which comprises at least one metal chlorite and at least one hydrophilic material capable of reacting with the metal chlorite when exposed to water. The composites which are described herein are useful in preparing films, labelstocks and labels which exhibit the desirable antimicrobial properties by providing a controlled release of chlorine dioxide gas over an extended period of time.
1. An adhesive-containing labelstock useful in reducing microbial populations comprising:
(A) a polymer film substrate comprising a terpolymer prepared from a mixture comprising (i) an olefin, (ii) at least one copolymerizable ethylenically unsaturated organic acid or ester, and (iii) carbon monoxide, said substrate having a first surface and a second surface, and
(B) an adhesive layer underlying the second surface of the substrate, and
(C) a polymeric topcoat layer having a first surface and a second surface wherein the second surface is in contact with the first surface of the polymer film substrate, and wherein at least one of the substrate, adhesive layer or topcoat layer contains an effective amount of an antimicrobial composition which comprises at least one metal chlorite and at least one solid inorganic hydrophilic material capable of reacting with the metal chlorite when exposed to water.
2. A label prepared from the adhesive labelstock of claim 1 .