4000 Nextel 440 fiber 0100200300400500600700800900100011001200130014001500 Fig. 1. Single fiber tensile strength at room temperature of differently pre-treated(5 h in air, different temperatures)S-glass-and Nextel 440-fibers. 40nm BN+110nmTIo2 40nm BN+40nmTIO2 0onm BN+40 nmT:o2 desized 40nm BN+110nmT:O2 desized 1500 2000 2500 Fig. 2. Single fiber tensile strength of differently coated Nextel 440-fibers, not pre-treated and 5 h heated up to 750C[14] left-hand corner and is continued clockwise. The starting blowing air and then pulled by rolls through a slurry bath. materials(at the top, left-hand side) are, on the one hand, The slurry consists only of the glass powder and distilled differently prepared rovings(bundles of differently coated water. During this transport process, the powder starts fibers) wound on coils. On the other hand, pulverized sticking to the surface of the fibers. In this way, the rovings matrix glass is employed. Then, the rovings are infiltrated transport the matrix glass powder out of the slurry by by the glass powder(at the top, in the middle). For this, adhesion. Then, they are reeled up in parallel on a capstan the fibers of the rovings are separated from each other by The resulting layers are now cut and removed from theleft-hand corner and is continued clockwise. The starting materials (at the top, left-hand side) are, on the one hand, differently prepared rovings (bundles of differently coated fibers) wound on coils. On the other hand, pulverized matrix glass is employed. Then, the rovings are infiltrated by the glass powder (at the top, in the middle). For this, the fibers of the rovings are separated from each other by blowing air and then pulled by rolls through a slurry bath. The slurry consists only of the glass powder and distilled water. During this transport process, the powder starts sticking to the surface of the fibers. In this way, the rovings transport the matrix glass powder out of the slurry by adhesion. Then, they are reeled up in parallel on a capstan. The resulting layers are now cut and removed from the Fig. 1. Single fiber tensile strength at room temperature of differently pre-treated (5 h in air, different temperatures) S-glass- and Nextel 440-fibers. Fig. 2. Single fiber tensile strength of differently coated Nextel 440-fibers, not pre-treated and 5 h heated up to 750 C [14]. D. Hu¨lsenberg et al. / Composites: Part B 39 (2008) 362–373 365