Patent ID: 8720356

Claim:
A method of making a woven sailcloth comprising the steps of: providing a first set of yarns, comprising at least partially a first type of yarn, providing a second set of yarns, comprising at least partially a second type of yarn, weaving the first set of yarns and the second set of yarns such that the first set of yarns are arranged along a first direction and the second set of yarns are arranged along a second direction which is different from the first direction and such that all the yarns arranged along the first direction come from the first set of yarns and all the yarns arranged along the second direction come from the second set of yarns, and exposing the woven sailcloth to a chemical solution which has the property of shrinking the first type of yarn in its longitudinal direction more than the second type of yarn when said woven sailcloth is exposed to said chemical solution and where the types of yarns which make up the first set of yarns are chosen such that the difference in the actual longitudinal shrinkage of the yarns which make up the first set of yarns in the woven sailcloth is less than 3% and where the types of yarns which make up the second set of yarns are chosen such that the difference in the actual longitudinal shrinkage of the yarns which make up the second set of yarns in the woven sailcloth is less than 3% when said woven sailcloth is exposed to said chemical solution.