Papermakers fabric having a tight bottom weft geometry

摘要

A two-face, double-layer forming fabric having a tight bottom weft geometry. The fabric, in general, comprises first and second pluralities of cross-machine direction yarns and a plurality of machine direction yarns interwoven in accordance with a desired weave pattern to define a top layer and a bottom layer. The top layer, which receives paper stock, is defined by the first plurality of cross-machine direction yarns. The bottom layer, which contacts machine rolls, is defined by the second plurality of cross-machine direction yarns. The second plurality of yarns are heat shrinkable.;In one embodiment of the fabric, all machine direction yarns are woven in an 8-shaft weave to provide a 1/3 twill on the top layer and a 1/7 twill on the bottom layer. The cross-machine direction floats formed by this weave pattern are flattened during heat treatment of the fabric because of shrinkage of the bottom layer cross-machine direction yarns.