Antimicrobial Polyethylene through Melt Compounding with Quaternary Ammonium Salts

Table 2

Results of the agar diffusion test. The plus signs indicate the presence of a zone of inhibition around a piece of quat-modified PE that was placed on a carpet of bacteria cultured on agar.

	Quats
	1	2	3	4	5	6	7	9
Before leaching	+	++	+	—	—	+++	+	++
After leaching	+	++	—	—	—	—	+	—