Table 1.

Comparison of mechanical properties, optical orientation and crystallinity index of A. pernyi silks, A. ventricosus spider dragline silk, and B. mori silk.

Silk	Spinning speed (mm/s)	Tensile strength (MPa)	Initial modulus (GPa)	Breaking energy ( × 105 J/kg)	Strain at breaking	Optical orientation (%)	Crystallinity index
A. pernyi silk	10	386	4.6	0.75	0.56	27.2	0.69
	25	403	5.0	0.61	0.37	36.0	0.73
	28	408	5.5	0.81	0.50	37.4	0.74
	52	483	7.2	0.63	0.32	39.4	0.76
	68	567	8.7	0.73	0.31	41.5	0.80
	95	639	9.9	1.04	0.40	46.4	0.84
	100	564	7.9	0.84	0.37	54.0	0.77
	Natural spinning	362	4.8	0.64	0.50	20.4	0.71
A. ventricosus spider dragline silk	10	1020	7.6	1.34	0.37	—	—
B. mori silk	10	400	4.0	0.76	0.35	—	—