Abstract: In order to investigate the factors influencing the service performance of flexible composites with three-dimensional large-spaced woven spacer fabrics for land-based inflatable antennas, three main aspects were investigated: the splicing strength caused by cutting and splicing, the material strength in acid and alkaline working environments, and the folding resistance after folding, unfolding and refolding. The results show that the splicing width of 30 mm, the adhesive polyurethane A584, and PVC laminated fabric warp to obtain the best splicing strength, which can reach the fracture strength of the reflective surface material. In the acid and alkali resistance test, both polyurethane A584 and TPU hot melt adhesive film did not come off, which showed good corrosion resistance, indicating that the materials of the reflective surface can adapt to various working environments of the antenna. The inflatable reflective surface material shows good folding performance, and its folding performance has a certain correlation with the number of folding times and splicing width, but not with the splicing glue. The width of the splicing material increases, the smaller the effect of the number of folding times on its role, and the folding return performance is better.

Key words: woven spacer fabrics, splicing strength, acid and alkali resistant, number of folds, composites