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    • 5. 发明授权
    • Filter material
    • 过滤材料
    • US5601716A
    • 1997-02-11
    • US654788
    • 1996-05-29
    • Gunter HeinrichRoland Kochel
    • Gunter HeinrichRoland Kochel
    • B01D39/00A47J31/08B01D39/16D04H13/00B01D39/04
    • D04H1/559A47J31/08B01D39/1615B01D39/163D04H1/56D04H1/732D04H13/00B65D85/808
    • The invention concerns a filter material particularly useful in the manufacture of tea bags, coffee bags, coffee filters and the like. The filter material includes an at least two layer non-woven substrate material wherein the two layers are essentially planar and superimposed, one layer is composed of natural fibers and one layer is composed of synthetic fibers. The synthetic fiber layer includes a plurality of individual plastic fibers which are deposited in a heated state on the natural fiber layer. The plastic fibers fuse with each other and also fuse with the natural fibers of the other layer. The filter material provides the particular advantage, due to the deposition of the individual plastic fibers on the natural fibers, of covering or closing a large number of pores or ducts in the natural fiber layer. The filter material of the invention has a low particle discharge since only minimal cross-pores are present in the filter material based on the tangled and closed filter material formed by the arrangement and fusing of synthetic fibers on the natural fiber layer.
    • 本发明涉及一种特别适用于制造茶包,咖啡袋,咖啡过滤器等的过滤材料。 过滤材料包括至少两层无纺基材,其中两层基本上是平面的并且重叠,一层由天然纤维组成,一层由合成纤维组成。 合成纤维层包括在天然纤维层上以加热状态沉积的多个单独的塑料纤维。 塑料纤维相互融合,并与另一层的天然纤维融合。 由于在天然纤维上沉积各种塑料纤维,在天然纤维层中覆盖或封闭大量孔或管道,所以过滤材料具有特别的优点。 本发明的过滤材料具有低的颗粒排放,因为基于通过在天然纤维层上合成纤维的布置和熔合形成的缠结和封闭的过滤材料,在过滤材料中仅存在最小的交叉孔。