Product description acetal copolymer Celcon? LW90 is designed for high-speed, low-wear metal applications developed nine nominal melt flow rate based materials. LW90 compliance with applicable FDA regulations for food contact. Features excellent abrasion resistance food contact compliance agency ratings FDA food contact, unrated RoHS Compliant contact the manufacturer of Physical Nominal Value Unit Test Method Specific Gravity - 1.43 g/cm3 ASTM D792 - 1.41 g / cm3 ISO 1183 melt flow rate of 9.0 g/10 min ASTM D1238 melt volume flow rate (MVR) (190 ° C/2.16 kg) 8.00 cm3/10min ISO 1133 shrinkage flow 2.2% ASTM D955 lateral flow 1.8% ASTM D955 Across Flow 1.5 % ISO 294-4 traffic 1.8% ISO 294-4 ISO 62 Water absorption saturation, 23 ° C 0.65% balance, 23 ° C, 50% RH 0.20% Mechanical Nominal Value Unit Test Method Tensile Modulus 2500 MPa ISO 527 -2/1A/1 tensile yield strength, 23 ° C 58.6 MPa ASTM D638 Tensile Yield 64.0 MPa ISO 527-2/1A/50 strain (yield) 9.0% ISO 527-2/1A/50 flexural modulus (23 ° C) 2600 MPa ISO 178 Impact Nominal Value Unit Test Method Notched Izod impact strength (23 ° C) 5.7 kJ/m2 ISO 180/1A Thermal Nominal Value Unit Test Method Heat Deflection Temperature 1.8 MPa, Unannealed 97.2 ° C ASTM D648 1.8 MPa, Unannealed 98.0 ° C ISO 75-2 / A linear expansion coefficient of ISO 11359-2 flow 0.00011 cm / cm / ° C lateral 0.00012 cm / cm / ° C Injection Nominal Value Unit Drying Temperature 80.0 to 100 ° C Drying Time 3.0 hr Rear Temperature First 170 到 180 ° C barrel temperature of 180 middle 到 190 ° C barrel temperature of 180 到 Department 190 ° C nozzle temperature of 190 到 200 ° C processing (melt) temperature of 180 到 200 ° C mold temperature 80.0 到 120 ° C injection temperature 60.0 到 120 MPa injection medium speed Pianman dwell 60.0 backpressure 0.00 到 到 120 MPa 0.500 MPa