| 摘要 |
25IMPREGNATED CLOTHAbstract:The invention provides a knitted spacer fabric having a tightly knitted bottom layer (10), amore loosely knitted upper layer (12) and linking fibres (14) extending across the space (16)between the lower and upper faces (10,12). Settable material, e.g. cement, is introduced intothe space (16) between the upper and lower faces and can be caused to set by the additionof a liquid, e.g. water. Until set, the fabric is flexible and can be shaped but after the materialin space (16) has set, the fabric is rigid and can be used as a structural element in a widerange of situations. The bottom layer (10) has an extension (24) that extends beyond theupper face (12) and is connected to the upper face by elastic connecting fibres (26) thatdraw the extension towards the other face, thereby at least partly closing the space at theedge of the cloth and preventing the settable material from spilling out. In addition, thepacking of the settable material and maximum space between the faces are such that only apredetermined amount of liquid can be accommodated within the space and that amount ismatched to the water required to set the cement.Figure 325 IMPREGNATED CLOTH Abstract: The invention provides a knitted spacerfabric having a tightly knitted bottom layer (10), a more loosely knittedupper layer (12) and linking fibres (14) extending across the space (16)between the lower and upper faces (10,12). Sellable material, e.g. cement,is introduced into the space (16) between the upper and lower faces and canbe caused to set by the addition of a liquid, e.g. water. Until set, thefabric is flexible and can be shaped but after the material in space (16)has set, the fabric is rigid and can be used as a structural element in awide range of situations. The bottom layer (10) has an extension (24) thatextends beyond the upper face (12) and is connected to the upper face byelastic connecting fibres (26) that draw the extension towards the otherface, thereby at least partly closing the space at the edge of the clothand preventing the settable material from spilling out. In addition, thepacking of the settable material and maximum space between the faces aresuch that only a predetermined amount of liquid can be accommodated withinthe space and that amount is matched to the water required to set thecement. Figure 3 |
