| 摘要 |
<p>1408346 Coating glass containers UNITED GLASS Ltd 14 March 1974 [14 March 1973] 12257/73 Heading B2E A glass container, especially a bottle, which has been subjected to a hot end metal oxide treatment is further treated to provide it with a lubricous and abrasion resistant finish by applying at 90-130‹C a coating of a fatty acid over the oxide layer and then applying an insoluble organic coating at 90-150‹C. The fatty acid may be oleic, palmitic or stearic acid and may be applied as a mist produced by atomising the acid into a heated chamber. The outer organic coating may comprise a polyolefine, a polyamide or an ethylene-vinyl acetate copolymer. In an example, glass bottles are sprayed with SnCl 4 /n-butyl acetate solution, passed through an annealing lehr to form a stannic oxide surface coating, treated with an oleic acid mist at 120‹C and then treated at above 90‹C with a polyethylene emulsion stabilised with potassium oleate.</p> |
