TECAFORM® (Acetal / POM)


TECAFORM® (Acetal) is produced by Ensinger Inc.  A high quality/stress relieved engineering thermoplastic polymer that provides good strength and stiffness.  Acetal homopolymer and acetal copolymer is easily machined with conventional metal working equipment and can be machined to very close tolerances. Both sheet and rod are available in many thicknesses and diameters.  Rod stock comes ground to diameter to accommodate through spindle turning.  Standard colors are black and (opaque) milk white, while custom colors are available as custom runs.

TECAFORM® is non hygroscopic and is FDA compliant.  It absorbs minimal amounts of moisture and can be cleaned easily.  As a result, it finds applications in high moisture, food handling, medical and marine components.

Although it has many benefits as an unfilled material, TECAFORM® can be filled with solid lubricants to enhance its bearing and wear properties. Materials such as PTFE , MoS2, Graphite and oil are all available in standard sizes. It is also available in 20% glass filled giving it additional electrical dielectric properties as well as strength and rigidity.

Specification Test Value Units
Specific Gravity, 73°F D792 1.41
Tensile Strength @ Yield, 73°F D638 11,000 psi
Tensile Modulus of Elasticity, 73°F D638 450,000 psi
Tensile Elongation (at break), 73°F D638 30 %
Flexural Strength, 73°F D790 13,000 psi
Flexural Modulus of Elasticity D790 450,000 psi
Shear Strength, 73°F D732 9,000 psi
Compressive Strength – Ultimate psi
Compressive Strength at 2% Deformation D695 psi
Compressive Strength at 10% Deformation D695 16,000 psi
Deformation Under Load %
Compressive Modulus of Elasticity, 73°F D695 450,000
Compressive Strength ⊥ to Laminate (Modulus) psi
Compressive Strength ⊥ to Laminate (Yield) psi
Compressive Strength ⊥ to Laminate (Ultimate) psi
Hardness, Durometer (Shore “D” scale) D2240 D86
Hardness, Rockwell (Scale as noted) D785 M89 Rockwell M
Izod Impact, Notched @ 73°F D256 Type A 1.0 ft.lbs/in. of notch
Coefficient of Friction (Dry vs Steel) Static PTM55007 .27
Coefficient of Friction (Dry vs Steel) Dynamic PTM55007 .25
Maximum Static Bearing Load (P) PTM55007 1,000 psi
Maximum Unlubricated No Load Bearing Velocity (V) PTM55007 50 ft/minute
Maximum Limiting PV (Unlubricated) PTM55007 12,500 psi x ft/min.
Wear Factor “K” x 10-10 PTM55010 200 Cubic in.-min/ft.lbs.hr
Sand Wheel Wear/Abrasion Test UHMW=100
Minimum Mating Surface Hardness Rockwell (Brinnell)
Coefficient of Linear Thermal Expansion E-831(TMA) 4.7 in/in/°F x 10-5
Coefficient of Thermal Expansion // to Laminates E-831(TMA) in/in/°F x 10-5
Coefficient of Thermal Expansion I to Laminates E-831(TMA) in/in/°F x 10-5
Softening Point 250 °F
Heat Deflection Temperature 264 psi D648 250 °F
Embrittlement Temperature °F Min.
Continuous Service Temperature in Air 180 °F Max.
Short Term Service Temperature 212 °F Max.
Tg-Glass Transition (Amorphous) D3418 °F
Melting Point (Crystalline Peak) D3418 347 °F
Thermal Conductivity F433 2.5 BTU-in/(hr/ft2°F)
Dielectric Strength Short Term D149 450 Volts/mil
Volume Resistivity D257 >1013 ohm/cm
Surface Resistivity D257 ohm/cm
Dielectric Constant, 106 Hz D150 3.7
Dissipation Factor, 106 Hz D150 0.005
Flammability @ 3.1mm(1/8 in.) UL94 UL94 HB
Arc Resistance seconds
Water Absorption, Immersion 24 Hours D570 (2) 0.2 %
Water Absorption, Immersion Saturation D570 (2) 0.9 %
Machinability Rating 1 1=easy, 10=difficult
Rod Diameter Availability (Off the Shelf) .25-6.0 inches
Sheet Thickness Availability (Off the Shelf) .125-3.0 inches
Characteristics / Attributes Excellent Machinability / FDA / Inexpensive / Stress Releived