Appendix

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Part 2:Technical characteristics of HPL

Table 12: Key figures at a glance

PropertyTest standardUnit of measurementHPL type
HGS / HGP / HGF
HDS / HDP / HDF
CGS / CGF
Flexural strength, lengthwiseISO 178N/mm²≥ 80≥ 140 (*)
Flexural strength, crosswiseISO 178N/mm²≥ 80≥ 100 (*)
Flexural modulus, lengthwiseISO 178N/mm²≥ 9000≥ 14000 (*)
Flexural modulus, crosswiseISO 178N/mm²≥ 9000≥ 10,000 (*)
Tensile strength, lengthwiseEN ISO 527-1N/mm²≥ 60≥ 115 (*)
Tensile strength, crosswiseEN ISO 527-1N/mm²≥ 60≥ 75 (*)
Impact resistance, lengthwiseISO 179-1kJ/m² ≥ 11 (*)
Impact resistance, crosswseISO 179-1kJ/m² ≥ 8 (*)
Compressive strength parallel to the layersDIN 52 185N/mm² ≥ 165 (*)
Split strengthDIN 53 463N ≥ 2500 (*)
Brinell hardnessEN 1534N/mm² ≥ 185 (*)
Thermal conductivityDIN EN 12 664W/(m·K)0.3CGS 0.3 (*)
CGF 0.5 (*)
Coefficient of linear thermal expansion, lengthwiseDIN 53 7521 / K9 × 10⁻⁶ 
Coefficient of linear thermal expansion, crosswiseDIN 53 7521 / K16 × 10⁻⁶ 
Sound reduction indexDIN EN ISO 10 140dB(A)Depends on material and construction
(*) The values were determined in a round-robin test on 10 mm HPL Compact at the IHD Dresden in October 2014.