| 摘要 |
A seat cushion comprises a supporting body of an open-celled, resilient foamed plastic material, an outer flame-resistant covering material encasing at least portions of the seat cushion, and a flame-resistant protective layer encasing the supporting body and connected thereto, the protective layer underlying the covering material and consisting of machine-knitted, multi-layered material. This protective layer material comprises warp threads arranged in two superposed planes and spaced apart a predetermined distance, the warp threads in an upper one of the planes being staggered in a woof direction by half the predetermined distance from the warp threads in a lower one of the planes, and the warp threads extending in a longitudinal direction, and a group of eight weft threads adjacent each other in the longitudinal direction. Two of the eight weft threads are looped around each warp thread in the upper plane, a respective one of the two weft threads is additionally looped around alternating ones of the wrap threads in the lower plane, three of the six additional weft threads are arranged between the two weft threads and are looped around different warp threads arranged only in one of the two planes, and each warp thread in each plane is looped around by only three weft threads. |
