| 摘要 |
<p>A fabric 30 comprising an oriented polyethylene film 35 adhesively laminated to a woven structure 32 of oriented tapes 33, 34 through a layer 31 of synthetic plastic polymer such as polyethylene is produced by extruding the polymer layer 31 between the woven layer 32 and polyethylene film 35 to laminate the layers and has improved stiffness particularly useful when automatically closing the mouths of sacks made of this fabric after filling. When the polymer layer has a lace- structure with holes 36 produced by incorporating a blowing agent with the polymer on extrusion, the resultant fabric also has improved tear resistance. The ratio of the area of the holes 36 in the lace layer to the total area of the lace layer is preferably between 0.6 and 0.8. <IMAGE></p> |
