Table 1.

Constituent properties.

Constutient	Density (g cm${}^{-3}$)	Elastic Modulus (GPa)	Tensile Strength (MPa)	Critical Length (mm)	Ref.
Fibres
curaua	1.50	39	660	2.22	[26]
flax-ft	1.54	52	580	1.56	[26]
flax-cu	1.40	-	-	-	[23]
jute	1.51	27	300	0.84	[26]
Matrices
epoxy	1.20	-	-	-	[27]
PLA	1.24	-	45	-	[28]
PP	0.92	1.5	-	-	[29]