High Density Polyethylene

item test unit HDPE method color     white porportion 1183 g/cm3 0.96 heat endurance(continuous)   ℃ 90 heat endurance(short time)   ℃ 110 melting point   ℃ 120 glass transition temperature   ℃   coefficient of linear thermal expansion(23--100℃ average value)   m/(m.k) 155×10-6 　　　　　—(23-150°C average value)   m/(m.k)   combustibility(UL94) 4589   HB water absorption(in 23℃ water for 24hours) 62 %   negative(suck in 23℃ water) 62 % 0.01 bending tensile stress/tensile stress of broken 527 MPa 30 breaking tensile strain 527 %   tensilbe modulus of elasticity 527 MPa 900 negative 1%/2%compressive stress of nomal strain 604 MPa 3/- pendulum impact test 179/1eU kj/m2   friction coefficient     0.3 luo's hardness Jan/39 - 62 resistance strength 60243 kv/mm >50 volume resistance -60093 Ω×cm ≥1015 surface resistance -60093 Ω ≥1016 relative permittivity-100Hz/1MHz -60250 - 2.4/- arc path index(CTI) -60112 -   bonding property     0 food contact     + acid resistance     + alkali resistance     + carbonated water resistance property     + aromatic compounds of aromatic compounds     0 resistance to ketones     + item test unit PE method