Two forms of an inorganic antibacterial agent, 2-hydroxypropyl-3-piperazinylquinoline carboxylic acid methacrylate (HPQM), were added into polypropylene sheet. The polypropylene sheet antibacterial, physical, and mechanical performance was assessed before and after exposure to ultraviolet light at different ultraviolet aging times. Water-based HPQM (HPQM-solution) and HPQM in

2Hydroxypropyl3PiperazinylQuinoline Carboxylic acid Methacrylate (HPQM), as one of the most effective anti-bacterial agents was introduced into polypropylene (PP) for the aim of anti-bacterial improvement. HPQM based water (HPQM-Solution) and HPQM based magnesium aluminometasilicate or Neusilin (HPQM-Neusilin) were supplied in the forms of liquid and solid powder, respectively. Physical appearances by means of discolorations of PP after introducing the HPQM-Solution or Neusilin were also investigated. Halo test and the dynamic shake flask methods accompanying with plate count agar technique were used for quantitative anti-bacterial performance analyzes and the results were reported in terms of radius of inhibition zone and percentage of bacteria reduction. HPQM-Neusilin samples showed obvious and better anti-bacterial performance as compared with the HPQM-Solution samples. The results by dynamic method suggested that the anti-bacterial efficacies of the HPQM-Neusilin samples were three times higher than those of the HPQM-Solution. To achieve the 99.9% of bacteria reduction, the optimum concentration of HPQM-Solution and HPQM-Neusilin required were 7,500 and 2,500 ppm, respectively. The addition of HPQM-Neusilin considerably changed the total color difference (ΔE*), the lightness (L*) and chromatic coordinate values (a* and b* values) of the PP, the effect being less pronounced in the case of HPQM-Solution.