Hydrophobic polymer surfaces whose level of protein binding is less than
about 50-80 ng/cm.sup.2 are achieved by: (1) applying a coating solution
composed of a solvent and a non-ionic surfactant having a HLB number of
less than 5 to the surface; and (2) drying the surface to remove the
solvent and thereby bring the surfactant into direct contact with the
hydrophobic polymer. The combination of a low HLB number and the drying
step have been found to produce low binding surfaces which can withstand
multiple washes with water and/or protein-containing solutions
Alternatively, the low binding surfaces can be produced by applying the
non-ionic surfactant to the mold surfaces which contact molten polymer
and form the polymer into a desired shape, e.g., into a multi-well plate,
a pipette tip, or the like. Further, the low binding surfaces may be
produced by incorporating non-soluble, non-ionic surfactants having an
HLB number of less than or equal to 10 into a polymer blend prior to
molding the article.