| 摘要 |
A method of sterilizing packaging material, for example containers for liquid material e.g. milk preformed from blanks, in which the surface of the packaging material to be sterilized is treated with superheated steam and acid. Acid is first applied to the surface of the packaging material to be sterilized and then the surface moistened with acid is treated with flowing steam at atmospheric pressure. The acid may be formic, acetic, malic, citric, lactic or ascorbic acid. |
