All the composites were prepared in a sheet form of 5 mm thickness (+10%) by pultrusion using RDXLL-5000 (Shanghai D&G Instruments Co., Ltd) injection moulding machine according to GB 1040-79 (China). Melt and mold temperature of 260°C and 80°C, respectively, have been used. A schematic of the matrix injection pultrusion process used for producing the thermosetting composites is shown in Figure 1. The manufactured composites were cured for 16 h in air at 315°C for polyimide case, followed by cooling at the rate of 1.3°C min–1. In the case of polyester resin, the composite is allowed to cure at near ambient conditions after emerging from pultrusion machine.