HYDEX® 4101 UD Blue

detectable pbt polyester

HYDEX 4101 UD blue has been specifically designed for the demanding environment of the food processing industry. For several years, the industry has been moving towards materials used in equipment design that are detectable in some way; either visually, by metal or x-ray detection, in order to improve food safety, and reduce the possibility of product contamination. HYDEX 4101 UD blue, a memeber of Ensinger's Ultra-detectable product family, offers visibility for all three detection types with one material. This multi-detectable plastic product’s specially formulated fillers are detectable to both x-ray and metal detection systems, and its blue coloration is visible to optical inspection systems. In addition, as part of the polyester family, HYDEX 4101 UD blue exhibits the very good physical properties typical of the family, as well as excellent resistance to chlorine and caustic cleaning solutions.  It is a food grade plastic material that can meet most agency requirements for food contact compliance.



Chemical designation
PBT (Polybutylene terephthalate)
1,59 g/cm3

Main Features

  • resistent to cleaning agents
  • food grade blue
  • good chemical resistance
  • good dimensional stability
  • good impact strength
  • metal detectable
  • x-ray opaque

Target industries

Technical details

  • Mechanical properties
    Mechanical propertiesValueUnitConditionTest Method
    Tensile strength9,300psi@ 73 °FASTM D 638
    Elongation at break3.53%@ 73 °FASTM D 638
    Modulus of elasticity
    (tensile test)
    550,000psi@ 73 °FASTM D 638
    Flexural strength15,250psi@ 73 °FASTM D 790
    Modulus of elasticity
    (flexural test)
    556,150psi@ 73 °FASTM D 790
    Compression strength13,760psi@ 73 °F, 10% strainASTM D 695
    Compression modulus346,360psi@ 73 °FASTM D 695
    Impact strength (Izod)0.58ftlbsinNotchedASTM D 256
    Rockwell hardness92-M-ScaleASTM D 785
    Compression strength3,200psi@ 73 °F, 1% strainASTM D 695
  • Thermal properties
    Thermal propertiesValueUnitConditionTest Method
    Deflection temperature393F@ 66 psiASTM D 648
    Deflection temperature275F@ 264 °FASTM D 648
    Thermal expansion (CLTE)4.05*10^-5 in/in / degreASTM D 696
    Service temperature221FLong Term-
    Melting temperature437F-
  • Other properties
    Other propertiesValueUnitConditionTest Method
    Moisture absorption0.2%@24 hr, 73 °FASTM D 570

Stock program