| 摘要 |
A chemical barrier fabric (12) includes at least first (18) and second (20) chemical barrier layers which have an interfacial region therebetween and which are intermittently point bonded (34) providing a point-bonded area which is in the minority and an un-bonded area (36) which is in the majority in the interfacial region. The chemical barrier layers (18,20) typically comprise single layer polymer films and/or co-extruded layers. A non-woven layer 22 may also be point-bonded to either the first (18) or the second (20) chemical barrier layer to give support to the fabric (12). A significantly improved chemical barrier effect is obtained with less than all over contact with one another compared with the sum barrier properties of the component layers. |
