OL C ML Fig.5 Schematic illustration of dragline microstructure. OL; Outer layer insensitive to rain and fog, ML; Middle Layer with oriented micro-fibrils supporting strength, C; Core with amorphous substance. 1 2 3 4 5 0 20 40 60 80 100 Dry as collected SCR=0.25 SCR=0.5 SCR=0.75 Load P (mN) Draw ratio λ 0 20 40 60 80 100 1 2 3 4 5 Wet SCR=0 SCR=0.25 SCR=0.5 SCR=0.75 Load P (mN) Draw ratio λ (a) dry state (b) wet state Fig.6 Load-draw ratio curves for draglines with different SCRs under (a) dry and wet states. 1 2 3 4 0 2 4 6 8 10 ③ ② ① ① Wet ② 1min wet-dry ③ no drop wet-dry Load P (mN) Draw ratio λ 5 (Crystalline) (Amorphous： Rubber) (Yield) Stress σ Fig.7 Load-draw ratio curves for capture thread Fig.8 3-elements model for deformation of under different conditions. spider thread. 5
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