System for adapting heat shrinkable fibrous structures to particular uses

  • US 5,059,378 A
  • Filed: 02/22/1990
  • Issued: 10/22/1991
  • Est. Priority Date: 02/22/1990
  • Status: Expired due to Fees
First Claim
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1. A structural or filler article of manufacture comprising one or more pairs of adjacent layers of heat-shrinkable fibers of different shrink characteristics in the respective layers which have been heat treated together to produce a differential degree of fiber shrinkage from layer to layer and consequent differential densification of the layers, the layers of at least one adjacent pair of layers being Z-axis linked by spanning pillars of Z-oriented fiber groups that span the layers.

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