For my MSc final dissertation, I am doing efficient lightweight composites for car seatback. For this, I choose Flax, Glass and carbon. Thank you for your valuable time.
1. https://compositesaustralia.com.au/wp-content/uploads/2011/12/Composite-Fibre-Volume-and-Weight-Ratios2.pdf please read it, it said aramid fibre/ epoxy resin gives less weight ,
2. out of glass and carbon , carbon gives less weight