Laminated cloth construction
First Claim
1. A sailcloth comprising at least three coextensive layers bonded together at their interfaces by a synthetic adhesive resin wherein one outer layer is a film of dimensionally stable synthetic polyester resin, the second outer layer is selected from the group consisting of a warp-knit fabric, a scrim fabric, taffeta and a film of dimensionally stable synthetic polyester resin, and wherein there are one or more inner layers one of which comprises a weft-free warp of strands of a stretch resistant polymer having a denier in the range of about 20 to about 1000.
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Accused Products
Abstract
Flexible laminates and methods for their preparation are disclosed. The laminates comprise co-extensive layers bonded together at their interfaces by a synthetic resin adhesive. One outer layer comprises a sheet of dimensionally stable (i.e. stretch resistant) synthetic resin film and the other outer layer is woven fabric, scrim, warp-knit fabric or a synthetic resin film. The laminate has at least one layer which is a warp of spaced individual strands of a stretch resistant synthetic polymer (polyamides and especially aromatic polyamides preferred). Where the second outer layer is a fabric the strands in the inner layer warp are oriented parallel to, or at an acute angle to, the warp in said fabric.
In one embodiment the flexible laminates have two inner layers each comprised of a warp of individual spaced apart strands of polymer fiber, the strands in one layer being oriented in a direction which is at an acute angle with respect to the direction of orientation of the strands in the other layer.
Continuous methods of preparing the various laminates are also described.
The flexible laminates find especial utility as cloth from which can be fabricated lightweight sails having high strength and stretch resistance in the direction of orientation of the warp strands as well as sufficient stretch and tear strength to withstand the loads in all other directions in the sail.
96 Citations
13 Claims
- 1. A sailcloth comprising at least three coextensive layers bonded together at their interfaces by a synthetic adhesive resin wherein one outer layer is a film of dimensionally stable synthetic polyester resin, the second outer layer is selected from the group consisting of a warp-knit fabric, a scrim fabric, taffeta and a film of dimensionally stable synthetic polyester resin, and wherein there are one or more inner layers one of which comprises a weft-free warp of strands of a stretch resistant polymer having a denier in the range of about 20 to about 1000.
- 10. A sailcloth comprising a three ply laminate wherein the inner ply is a weft-free warp of strands of an aromatic polyamide having a denier in the range of about 200 to about 2000 said warp containing from about 5 to about 20 strands per inch one of said outer plies is a film of dimensionally stable polyester and the other of said outer plies is a fabric woven from polyester fibers, said plies being bonded together at their abutting surfaces by a synthetic polymer adhesive.
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13. A sailcloth which comprises a film of dimensionally stable synthetic resin reinforced by a weft-free warp of strands of a stretch reistant synthetic polymer and aligned substantially in the direction in which maximum strength is required in said laminate.
Specification