Table 1.

Comparison of the different shredding technologies commonly used for composites comminution.

Technology	Type of Shredding	Throughput	Efficiency	Suitability for Composites
Two shafts shear shredder	Coarse	High	Risk of fibers wrapping	Good for coarse shredding
Single shaft shear shredder	Coarse	High	Good	Good for coarse shredding
Hammermill	Coarse/fine	High	Good for thermoset matrixes, not suitable for thermoplastic matrixes	Good for coarse shredding of thermoset composites
Impact crusher	Coarse	High	Not suitable for thermoplastic matrixes	Low
Jaw crusher	Coarse	High	Not suitable for thermoplastic matrixes	Low
Cutting mill	Fine	Mid	Good	Good for fine shredding
Disc mill	Fine	Low	Not suitable for thermoplastic matrixes	Low
Chain mill	Coarse	High	Good for thermoset matrixes, not suitable for thermoplastic matrixes, creation of powder	Good for coarse shredding of thermoset composites