Poliacetal - POM - A.D.

Chemical Designation: Polyoxymethylene (Homopolymer)

DIN Abbreviation: POM

Colour, Filler: Opaque

Stock Availability: Standard lengths 3 metres, also cut to size

Rod 3 - 250 mm dia

Plate 5 - 100 mm thick

Tube 20 - 300 mm OD

Profile

Finished parts, machined or injection moulded

Poliacetal POM- A.D. is a semicrystalline, thermoplastic engineering material with high strength and rigidity, excellent machinability and varied applications.

Main characteristics: strong and rigid, very good electrical

tough insulation

good sliding properties, easily machined, polished

resistant to dilute acids, not resistant long term

cleaning agents, numerous to water over 60 °C

solvents, easily welded

  • Preferred Fields: Mechanical engineering, automotive engineering, transport and conveyor technology, electrical engineering, precision engineering, household appliances, plant construction
    •

    Applications: friction bearings, friction strips

    gears, plugs

    spring elements, insulators

    housing parts, snap fit connectors

    rollers, seals

    Poliacetal - POM A.D.

    The following information corresponds with our current knowledge and indicates our products and possible applications. We cannot give a legally binding guarantee of certain properties or the suitability for a specific application. Existing commercial patents must be observed. A definitive quality guarantee is given in our general conditions of sales. Unless otherwise stated, these values represent averages taken from injection moulding samples. We reserve the right of technical alterations.

    Properties Unit Test method DIN ASTM  
    Mechanical      
    Density g/cm³ 53 479 1.42
    Tensile strength at yield MPa 53 455 70
    Tensile strength at break MPa 53 455  
    Elongation at break % 53 455 40
    Modulus of elasticity in tension MPa 53 457 3300
    Modulus of elasticity in flexure MPa 53 457 2620
    Ball indentation hardness MPa 53 456 170
    Impact strength
    (Charpy)    		 kJ/m2 53 453 no br.
    Creep rupture strength after 1000 hrs with static load MPa   40
    Time yield limit for 1% elongation after 1000 hrs. MPa   13
    Coefficient of friction against hardened and ground steel
    p = 0,05 N/mm², v = 0,6 m/s    		 –   0.34
    Wear conditions as above µm/km   4.6
    Thermal      
    Crystalline melting point °C 53 736 175
    Glass transition temperature °C 53 736 - 38
    Heat distortion temperature Method A Method B °C
    °C    		 ISO 75
    ISO 75    		 124
    170
    Properties Unit Test method DIN ASTM  
    Thermal      
    Max. service temperature
    short term long term    		 °C
    °C    		   150
    100
    Coefficient of thermal conductivity W/(m . K)   0.31
    Specific heat J/(g . K)   1.5
    Coefficient of thermal expansion 10-5/K   10
    Electrical      
    Dielectric constant at 105 Hz   53 483 3,7
    Dielectric loss factor at 105 Hz   53 483 0.005
    Specific volume resistance W . cm 53 482 1015
    Surface resistance W 53 482  
    Dielectric strength 1 mm kV/mm 53 481 >50
    Tracking resistance   53 480 KA 3c
    Miscellaneous      
    Moisture absorption:
    Equilibrium in standard atmosphere (23 °C / 50 % relative humidity)    		 % 53 714 0.3
    Water absorption at saturation
    at 23 °C    		 % 53 495 0.5
    Resistance to hot water, washing soda     not resistant
    Flammability   UL 94 HB
    Resistance to weathering     not resistant

    * after storage in a standard 23/50 atmosphere (DIN 50 014) to equilibrium

    Europlásticos coloca a disposição, também :

    • Semi-finished product, finished parts, injection moulded parts and profiles in more than 500 materials and modifications.
    • Engineering plastics: PA extruded or cast, POM, PC, PET, PBT, PPE, PP, PE
    • High temperature plastics: PI, PEEK, PPS, PES, PPSU, PEI, PSU, PVDF, PCTFE, PTFE
    • Stock length: Standard 3 metres
    • Pressed/sintered semi-finished product: PI, PEEK, PPS, PTFE/PI and modifications, as well as PCTFE in special sizes ie, large discs, tube and rings with diameters up to about 820 mm
    • Material modifications: eg glass, carbon and aramid fibre, talc, MoS2, graphite, PTFE, PE, silicone oil, internal lubrication
    • Pultruded stock shapes: matrix polyester, vinylester and epoxy resin with glass or carbon continuous fibre.

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