Patent ID: 6890871

Claim:
Penetration-resistant material comprising at least one layer having a thickness D, the layer comprising a first and second layer of woven fabric, with the first and second layers being bonded together with an adhesive material, the 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, the filaments forming the threads having a diameter F 1 , and comprising at least 65% of the first layer 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 at an angle of>0° to 90° with respect 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 being greater than 1:1, and the second layer of fabric being 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 second layer fabric weight, the filaments forming the threads having a diameter F 2 , with the second set of threads being at an angle of>0° to 90° with respect 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 being greater than 1:1, and the first and second sets of threads of the first fabric layer being oriented parallel to the first and second sets of threads, respectively, of the second fabric layer and the ratio D/F 1 and D/F 2 being 14.5 to 40.