HYDEX® 4101 PBT black

Pbt polyester black

HYDEX® 4101 PBT black is a PBT polyester thermoplastic that can withstand higher impact than PET polyesters and thus carries reduced risk of part breakage in operation.  It is a food grade plastic material that can meet most agency requirements for food contact compliance, and is ideal for machined parts in food processing equipment. HYDEX 4101 black has excellent resistance to typical cleaning chemicals such as chlorine and caustic solutions and has a very low moisture absorption rate, as much as 15 times less than nylon.


Chemical designation
PBT (Polybutylene terephthalate)
1,31 g/cm3

Main Features

  • resistent to cleaning agents
  • very good chemical resistance
  • good wear resistance
  • good impact strength
  • low moisture absorption

Target industries

Technical details

  • Mechanical properties
    Mechanical propertiesValueUnitConditionTest Method
    Coefficient of friction0.19lbs/in^2Static-
    Coefficient of friction0.25lbs/in^2Dynamic, 40 psi, 50 fpm-
    Wear rate210*10-10in3minftlbshr@ 2000 PV-
    Impact strength (Izod)0.7ftlbsinASTM D 256
    Modulus of elasticity
    (flexural test)
    430,000psi@ 73 °FASTM D 790
    Elongation at break50%@ 73 °FASTM D 638
    Tensile strength9,400psi@ 73 °FASTM D 638
    Modulus of elasticity
    (tensile test)
    430,000psi@ 73 °FASTM D 638
    Elongation at yield6%@ 73 °FASTM D 638
    Flexural strength13,000psi@ 73 °FASTM D 790
    Rockwell hardness87-M ScaleASTM D 785
    Compression strength2,800psi@ 73 °F, 1% strainASTM D 695
    Compression strength11,500psi@ 73 °F, 10% strainASTM D 695
    Compression modulus315,000psi@ 73 °FASTM D 695
  • Thermal properties
    Thermal propertiesValueUnitConditionTest Method
    Deflection temperature200F@264 psiASTM D 648
    Service temperature221FLong Term-
    Deflection temperature310F@ 66 psiASTM D 648
    Thermal expansion (CLTE)6.1*10^-5 in/in / degre-
  • Other properties
    Other propertiesValueUnitConditionTest Method
    Moisture absorption0.02%@ 24 hrs, 73 °FASTM D 570
    Limiting PV6,000psi-fpm@ 100 fpm-
    Flammability (UL94)HB--

Stock program