https://www.avient.com/sites/default/files/2021-10/microbial-susceptibility-of-various-polymers-and-evaluation.pdf
Concurrently, there is rising market demand for plas-
tic products treated with antimicrobial additives for
applications in packaging, automotive, consumer goods,
medical and healthcare, building and construction, sport-
ing goods, and electronics markets.
Other categories of antimicrobial applications within
the plastics family include medical devices and technolo-
gies for odor prevention and aesthetics preservation.
For TPE compounds tested containing
1000–1500 ppm of ZPT, all exhibited ≥3-log reductions
(99.9%) in E. coli and ≥4-log reductions (99.99%) in
TABLE 2 ASTM G21 results for
control and ZPT-loaded Versaflex™ and
OnFlex™ TPE line products
Sample Market application ZPT loading (ppm) 28-day ratinga
GP 2810-40N Consumer overmold 0 4
1000 0
CE 3120-65 Consumer electronics 0 4
LO 7120-45B Automotive and HVAC 0 4
CL2242 Medical 0 4
1500 2
HC BT218 Medical 0 2
G2705N Consumer health/medical 0 4
Abbreviations: ASTM, American Society for Testing and Materials; HVAC, heating, ventilating, and air-
conditioning; TPE, thermoplastic elastomer; ZPT, zinc pyrithione.
aNumerical rating according to ASTM G21-15 where 0 indicates no growth and 4 indicates heavy growth
(61%–100% sample coverage).