Film formation mechanism in glass lubrication by polymer latex dispersions

Abstract

Ab s t r a c tThe stabilization of organic coatings by tin dioxide resulting in glass bottle lubrication was investigated on flat glass. The anchoring function of SnO 2 was assessed for a mixture of polyethylene and polymethylmethacrylate. Friction tests in air confirm the SnO 2 anchoring property with the maintaining of the lubricant effect due to the polymer over large sliding distances. The persistence of the polymethylmethacrylate stretching band ν C=O on significant sliding distances in infrared microscopy experiments shows that the polymer coating stabilization results from the strong adhesion of the polymer on SnO 2 . The impact of roughness and surface chemistry on the stabilization of the polymer coating was tested. The 2 suppression of the lubricant effect by surface chemistry alteration or by roughness modification of SnO 2 suggests that roughness and surface chemistry of SnO 2 are both necessary for lubrication.

Revealing the surface structural cause of scratch formation on soda-lime-silica glass

“…The tin oxide coating acts as an anchoring agent and a primer for the cold-end coating, which is a thin layer of polymeric emulsion such as polyethylene and waxes. The flexible polymer chain primarily serves as a load dissipating (lubricating) agent during a scratching event to lower the coefficient of friction-consequently enhancing the scratch resistance of the glass surface 2,3,5,6 . This two-stage coating process is widely accepted by container glass-producing companies.…”

Influence of formulation on friction properties of latex films

“…NaPAA at the surface, plasticized by water, is so soft that it does not resist much to the indenter motion. This is typically the case of a lubricated contact [48,49]. In the conditions of our experiments, NaPAA acts as a lubricant.…”