| 摘要 |
A multilayer filter medium comprising, from upstream to downstream relative to a direction of filtration, at least a first layer made of glass fibre (C, C'), a second intermediate layer made of coarse mesh nonwoven fabric (D, D') and a third support layer (E, E') made of nonwoven fabric, characterized in that the intermediate layer (D, D') of coarse mesh nonwoven fabric is joined by fusion and/or bonding both to the first layer in glass fibre (C, C') and to the third support layer (E, E') in nonwoven fabric. The object of the invention includes a process for realizing a multilayer filter medium. |
