We are interesting in all recyclable plastic material; So we buy :

Polyethylene 
Polypropylene 
PVC
ABS
PET
ABS/PC
Acetal
Acrylic (PMMA)
Cellulosics
ETFE
FEP Fluoropolymer
High Temperature Materials
LCP
Nylon (PA)
PFA Fluoropolymer
PPO (Noryl)
PPS
PTFE
PVDF
Polycarbonate (PC)
Styrene (PS, HIPS MIPS)
TPE
TPU