Poliacetal – POM – A.H.

Chemical Designation: Polyoxymethylene (Copolymer)

DIN Abbreviation: POM

Colour, Filler: opaque

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

Rod 3 – 250 mm dia

Plate 1 – 100 mm thick

Tube 20 – 300 mm OD

Profile

Finished parts, machined or injection moulded

Poliacetal – POM A.H. is a semicrystalline thermoplastic engineering material with high strength and rigidity, excellent machinability and versatility of application.

Main characteristics: strong and rigid very good electrical

tough insulation

good sliding properties, easily machined, polished

resistant to hot water, difficult to bond

dilute acids, cleaning, easily welded

agents, numerous solvents

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

Applications: friction bearings, friction strips

gears, plugs

tool supports, insulators

housing parts, agitators and kneeding elements

rollers, seals

Poliacetal – POM A.H.

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 1.41
Tensile strength at yield MPa 53 455 65
Tensile strength at break MPa 53 455
Elongation at break % 53 455 40
Modulus of elasticity in tension MPa 53 457 3100
Modulus of elasticity in flexure MPa 53 457
Ball indentation hardness MPa 53 456 155
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		 – 0.32
Wear conditions as above µm/km 8.9
Thermal
Crystalline melting point °C 53 736 165
Glass transition temperature °C 53 736 – 60
Heat distortion temperature Method A Method B °C
°C		 ISO 75
ISO 75		 110
160
Properties Unit Test method DIN ASTM  
Thermal
Max. service temperature
short term long term		 °C
°C		 140
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 3,5
Dielectric loss factor at 105 Hz 53 483 0.003
Specific volume resistance W . cm 53 482 1015
Surface resistance W 53 482 1013
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 limited 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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