Patent ID: 7132380

Claim:
A penetration-resistant material comprising at least a double layer of woven fabric, wherein the double layer comprises: a first layer of fabric composed of: a first set of threads comprising 3.5 to 20 threads/cm, having a linear density of at least 210 dtex, and at least 65% of the fabric weight, and a second set of threads comprising 0.5 to 16 threads/cm and having a linear density of at least 50 dtex, with the second set of threads being transverse to the first set of threads, and the ratio of the number of threads/cm of the first set to that of the second set is greater than 1:1; and a second layer of fabric composed of: a first set of threads comprising 0.5 to 16 threads/cm and having a linear density of at least 50 dtex; and a second set of threads comprising 3.5 to 20 threads/cm, having a linear density of at least 210 dtex, and comprising at least 65% of the fabric weight, with the second set of threads being transverse to the first set of threads, and the ratio of the number of threads/cm of the second set to that of the first set is greater than 1:1, and wherein the first and second sets of threads of the first layer have a parallel orientation towards the first and second sets, respectively, of threads of the second layer.