| 摘要 |
The present invention relates to filtration materials, in particular filtration materials comprising a substrate impregnated with an activated particulate substance and/or another functional material. The invention also relates to the use of such materials and to a process for their production. The process comprises the steps of providing a substrate, providing a reservoir charged with a an emulsion or solution of an activated particulate material, and/or, another functional material, wherein the reservoir has an openable discharge port, actuating the openable discharge port to discharge a desired quantity of the emulsion or solution onto the substrate, allowing the emulsion or solution to impregnate the substrate and drying the impregnated substrate to remove a volatile component of the emulsion.
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