Ultra-resilient fabric
A structure for use in industrial fabrics such as paper machine clothing and engineered fabrics. The structure contains both axially elastomeric yarns and relatively inelastic yarns in various patterns. The structure has a high degree of both compressibility under an applied normal load and excellent recovery (resiliency or spring back) upon removal of that load.
1. A compressible resilient industrial fabric having an original thickness, wherein the fabric comprises:
a laminated structure comprising
a plurality of substantially parallel cross-machine direction (CD) yarns;
a plurality of substantially parallel machine direction (MD) yarns;
a first layer of the parallel yarns running in either the CD or the MD direction;
a second layer of the parallel yarns on one side of the first layer, the second layer yarns running in the CD or MD direction different from that of the first layer and comprising a plurality of elastomeric yarns; and
a third layer of the parallel yarns on the opposite side of the second layer as the first layer and running in the same direction as those of the first layer,
wherein the parallel yarns of the third layer are aligned such that the parallel yarns of the third layer nest between the parallel yarns of the first layer without interfering with one another to allow the fabric to compact to form a planar structure in a through thickness direction when the fabric is under a compressive load,
wherein the elastomeric yarns are elastic in their thickness or radial direction and length or axial direction such that under the compressive load the elastomeric yarns stretch and
compress to conform to the nesting and the fabric springs back to substantially the original thickness after removal of the load, and
wherein the fabric is formed in an endless structure in the form of a continuous loop.
2. The fabric of claim 1 wherein the number of yarns in the third layer is less than the number of yarns in the first layer.
3. The fabric of claim 1 wherein the yarns of the second layer are orthogonal to those of the first and third layers.
4. The fabric of claim 1 wherein the fabric comprises:
a fourth layer of parallel yarns in the same direction as the second layer, the yarns comprising the elastomeric material; and
a fifth layer of parallel yarns in the same direction as the first layer, wherein the yarns of the fifth layer are aligned in the same vertical plane in a through thickness direction as that of the first layer.
5. The fabric as claimed in claim 1 , wherein the elastomeric yarn is selected from the group consisting of: a monofilament, a multifilament, a plied monofilament, a wrapped yarn, a knitted yarn, a twisted yarn, a multicomponent yarn, and a braided yarn.
6. The fabric as claimed in claim 1 , wherein the elastomeric yarn is selected from the group consisting of: a polyurethane and rubber.
7. The fabric as claimed in claim 1 , wherein the elastomeric yarn is selected from yarns having a cross-section of differing geometric configurations.
8. The fabric as claimed in claim 7 , wherein the elastomeric yarn is selected from the group consisting of: round, non-round, square, rectangular, elliptical, and polygonal.
9. The fabric of claim 1 wherein the fabric is selected from the group of fabrics including:
paper machine clothing
a forming fabric;
a press fabric;
a dryer fabric;
a through air dryer fabric;
a shoe press belt base;
a calendar belt base;
an engineered fabric base;
a transfer belt base; and
a belt used in the production of nonwovens by processes such as airlaid, melt blowing, spunbonding, and hydroentangling.
10. The fabric of claim 1 wherein the fabric is a base for a dryer fabric, whereby the dryer fabric further includes;
a backside on a nonsheet contact side of the fabric, the backside including angled extrusions.