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METHOD OF OBTAINING SEALING COMPOUND IMPERMEABLE FOR WATER AND/OR OILS, CONTAINING A SWELLING CLAY AND SEALING MAT CONTAINING SUCH SWELLING CLAY
METHOD OF OBTAINING SEALING COMPOUND IMPERMEABLE FOR WATER AND/OR OILS, CONTAINING A SWELLING CLAY AND SEALING MAT CONTAINING SUCH SWELLING CLAY
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机译:含有膨胀粘土的水和/或油类不渗透密封材料的获得方法以及含有这种膨胀粘土的密封垫的方法
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摘要
Described is a process for the continuous production of a water- and/or oil-impermeable (impervious) liner (sealing matt) wherein expansive (swellable) clay is needled into between a carrier layer and a nonwoven top (cover) layer while at the same time an expansive clay additionally sprinkled onto the upper surface of the top layer is incorporated into the top layer. Subsequently the expansive clay present in the top layer is incipiently moistened and re-dried. A modified embodiment uses only a carrier layer made of a nonwoven, woven fabric or knitted fabric and/or a foil, the foil being a plastic film, a fabric-reinforced plastic film or paper, and a coarsely porous nonwoven or a non-consolidated crosslaid (fibre-crossed) card web or a random-laid fibre web, to which the pulverulent expansive clay is applied and needled in, moistened and dried. Instead of the needling technique it is also possible to use the knitting and/or sew-knitting technique.
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