| 摘要 |
The filter cloth is prepd. by ; preparing the middle layer by mixing zeolite of 400-600 mesh, active carbon and diatom earth in the wet polyurethane resin gel; laminating polyethylene or polypropylene woven cloth of 9 folded yarn onto both surfaces of the middle layer; and pressing by oil pressure and molding; then preparing the filter cloth by dipping in water for 0.5-1 hr.. In the process, the mixed ratio of zeolite, active carbon, diatom and wet polyurethane resin is 5:13:5:50. The obtd. filter cloth is useful for treating waste water.
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