| 摘要 |
<p>A composite forming fabric, comprising in combination a paper side layer having a paper side surface, a machine side layer and paper side layer intrinsic warp binder yarns. Each of the paper side layer and the machine side layer are woven together in a repeating pattern, and the two layers together are woven in at least 6 sheds, and up to at least 36 sheds can be used. All of the paper side layer warp yarns are provided by pairs of intrinsic warp binder yarns. The paper side layer weave pattern provides an unbroken warp path in the paper side surface including at least two segments, occupied in turn by each intrinsic binder yarn; the segments are separated by at least one paper side layer weft. Within each segment, each intrinsic binder yarn also interlaces once with a machine side layer weft, at the same point as a machine side layer warp interlaces with the same weft. The weave path occupied by each member of a pair of intrinsic warp binder yarns can be the same or different. The segment lengths can be the same or different, and the machine side layer interlacing points can be regularly or irregularly spaced apart. The fabrics as woven and before heat setting conveniently have a warp fill of from about 100% to about 125%. After heat setting, the fabrics typically have a warp fill from about 110% to about 140%, an open area of about 35% or more in the paper side face of the paper side layer, and an air permeability that is typically from about 3,500 to about 8,200 m3/m2/hr. The fabrics are thus particularly suitable for the formation of paper products having very low micro density differences, which provides enhanced printability.</p> |
