Method and apparatus for forming fabrics and fabrics made by the method
AssigneeSaint-Gobain Performance Plastics Corporation
InventorsKatherine M. Sahlin, Michael P. Cushman
Life of this patent
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Abstract
A method for forming a material having an individually stabilized ply includes providing a ply having a non-orthogonal orientation. A stabilizing agent is then applied to maintain the orientation of the ply. The stabilizing agent could alternately be applied before forming the ply. The ply may be woven in a non-orthogonal orientation, or may have its orientation changed to the final non-orthogonal orientation. Changing may occur over multiple steps and may include using an accumulator and/or payout station to change the orientation.
Claims61
A multi-ply composite formed by a method for forming a material having an individually stabilized ply, the multi-ply composite comprising:
- a first woven ply comprising a first non-orthogonal orientation;
- a second ply comprising a second non-orthogonal orientation different than the first non-orthogonal orientation, the first non-orthogonal orientation and the second non-orthogonal orientations occurring in overlapping areas of the multi-ply composite;
- and
- a third ply having an orthogonal orientation.
A multi-ply composite having an individually stabilized ply, the multi-ply composite comprising:
- a first woven ply comprising a first non-orthogonal orientation, the first non-orthogonal orientation being a positive non-orthogonal orientation;
- and
- a second ply comprising a second non-orthogonal orientation, the second non-orthogonal orientation being a negative non-orthogonal orientation;
- wherein the first non-orthogonal orientation and the second non-orthogonal orientations occurring in overlapping areas of the multi-ply composite;
- a third ply comprising an orthogonal orientation;
- wherein the multi-ply composite has,
- a trapezoidal tear strength at a diagonal of at least about 300 pounds;
- a warp strip tensile strength of at least about 1300 pounds per inch;
- a fill strip tensile strength of at least about 1300 pounds per inch;
- a warp tensile strength after a 50 pound creasefold of at least about 1200 pounds per inch;
- a fill tensile strength after a 50 pound creasefold of at least about 1200 pounds per inch;
- wherein the multi-ply composite is about 0.04 to about 0.3 inches thick;
- wherein the first non-orthogonal orientation comprises a skew angle of about 30 degrees to about 60 degrees;
- and
- wherein the second non-orthogonal orientation comprises a skew angle of about 30 degrees to about 60 degrees.
Dependencies are inferred from the claim text.