Features POM plastic materials: Front (1) POM can be processed without drying, preferably preheated (about 80 ℃) in the process, the product is good dimensional stability (2) POM processing temperature is very narrow (. 0 ~ 215 ℃), when longer residence time in the barrel or the temperature exceeds 220 ℃ will break down, resulting in strong irritant formaldehyde gas. (3) holding pressure to be larger (POM material injection when the injection pressure close ), in order to reduce the pressure drop screw speed is not too high, the residual amount is less; Larger (4) POM product shrinkage, easy to produce shrinkage or deformation .POM large specific heat, high mold temperature (80 ~ 100 ℃), product When a release is very hot, the need to prevent scald your finger. (5) POM should "press the speed, low melt temperature, mold temperature higher" Under the conditions of molding, precision molding products when required mold temperature control (6 ) with high mechanical strength and rigidity (7) the highest fatigue strength (8) environmental resistance, resistance to organic solvents (9) resistance to repeated impact resistance, good electrical properties, good recovery, with self-lubricating, corrosion good wear resistance, dimensional stability POM plastic materials Typical applications: can replace most of the non-ferrous metal, auto parts, machine parts, instrumentation internal parts, bearings, fasteners, gears, springs, pipes, conveyor belts accessories, electric kettles, pump casing, drain, a faucet, pulleys, etc. POM 100ST DuPont ① material property data description specification levels: injection grade Color: --- Application: for there must be super toughness high load parts. Remark: processing characteristics: high viscosity resin, for easier filling of the mold. Lubricated surface. Product features: super toughness Delrin. ② raw technical data Performance Project test conditions [state] method of test data Data unit Physical properties Proportion --- ASTM D-792 1.34 --- 24 hours dipping water absorption ASTM D-570 0.43% water uptake at 50% relative humidity ASTM D -570 dipping 0.35% water absorption equilibrium point ASTM D-570 0.85% pyrophoric --- UL-94 HB --- --- --- die shrink 1.2-1.4% Rockwell hardness mechanical properties M --- ASTM D -785 58 Rockwell hardness --- R --- ASTM D-785 105 --- Tensile Strength -55 ℃ ASTM D-638 99 MPa tensile strength 70 ℃ ASTM D-638> 29 MPa tensile strength of 100 ℃ ASTM D-638> 17 MPa tensile strength of 122 ℃ ASTM D-638> 11 MPa tensile strength 23 ℃ ASTM D-638 64 MPa tensile fracture point deformation of -55 ℃ ASTM D-638 455% elongation breaking point the amount of 23 ℃ ASTM D-638 521% rupture point elongation amount 70 ℃ ASTM D-638> 498% tensile deformation of the rupture point 100 ℃ ASTM D-638> 580% tensile deformation of the rupture point 122 ℃ ASTM D- 638> 480% modulus of elasticity 23 ℃ ASTM D-638 1280 MPa flexibility factor -55 ℃ ASTM D-790 3260 MPa flexibility factor 23 ℃ ASTM D-790 1280 MPa flexibility factor 70 ℃ ASTM D-790 650 MPa flexural coefficient 100 ℃ ASTM D-790 340 MPa Flexural coefficients 122 ℃ ASTM D-790 230 MPa flexural deformation strength 23 ℃ ASTM D-790 40 MPa compressive stress 23 ℃, 1% deformation ASTM D-695 8 MPa compressive stress 23 ℃ 10% deformation ASTM D-695 52 MPa Shear strength 23 ℃ ASTM D-732 34 MPa, flexural fatigue endurance limit of 50% RH, 23 ℃, 106 cycles ASTM D-671 16 MPa load deformation of 140kg / cm2,50 ℃ ASTM D-621 3.0% tensile impact strength test piece length of 23 ℃ ASTM D-1822 1590 kj / m2 IZOD notched impact test -40 ℃ ASTM D-256 249 j / m IZOD impact test 23 ℃ ASTM D-256 901 j / m electrical properties of anti-arc 3.1mm ASTM D-495 120 sec dielectric constant 50% RH, 23 ℃, 102 ~ 106Hz ASTM D-150 4.1 Ω.cm dielectric factor of 50% RH, 23 ℃, 106Hz ASTM D-150 0.007 --- dielectric strength instantaneous Short time (2.3mm) ASTM D-149 19.9 (2.3) kv / mm Volume resistivity 23 ℃, 0.2% water content ASTM D-257 2.3 × 1014 Ω.cm Thermal heat distortion temperature 1.8MPa ASTM D-648 65 ℃ heat distortion temperature 0.5MPa ASTM D-648 168 ℃ melting point --- ASTM D-2133 175 ℃ linear thermal expansion coefficient of -40 ~ 29 ℃ ASTM D-696 9.9 10-5m / m ℃ linear thermal expansion coefficient of 29 ~ 60 ℃ ASTM D-696 10.6 10-5m / m ℃ linear thermal expansion coefficient 60 ~ 104 ℃ ASTM D-696 9.7 10-5m / m ℃ linear thermal expansion coefficient 104 ~ 160 ℃ ASTM D-696 12.8 10-5m / m ℃