| 摘要 |
<p>A nonwoven sheet 11 of weight 20 to 500 g/m<2> for a flat article with good dimensional stability in all the conditions of production, of subsequent treatments and of use, comprises at least one nonwoven sheet based on chemical textile material in the form of continuous fibres or filaments and high-modulus reinforcing threads 3 (Young's modulus of more than 20 GPa) arranged parallel to each other in its lengthwise direction. 2-3 g/m<2> of glass threads are preferably employed as reinforcing threads. Aramid, polyester carbon and metal are also mentioned. The reinforcing threads are combined with the nonwoven sheet by chemical bonding or heat-bonding and/or needling. The substrate may be used as a sealing membrane reinforcement (impregnated with bitumen then coated with bitumen), primary or secondary substrate for tuft carpeting, reinforcement for floor covering tiling, substrate for coating, substrate for flock, and the like. As shown the reinforcing threads are sandwiched between air laid layers of polyester fibres but they can be disposed on both sides of an air laid or wet laid layer. …<IMAGE>… </p> |
