Delrin® AF Blend PTFE Filled Acetal Sheet - Custom Plastic Fabricators and D Modern Plastics Online

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Other attributes of Delrin® AF Blend acetal products include:

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Delrin® AF Blend PTFE Filled Acetal Sheet

Delrin® AF Blend, Acetal Homopolymer, PTFE filled, extruded -as manufactured by Quadrant Engineering Plastic Products is a is a unique thermoplastic material for use in moving parts in which low friction and long wear are important. It is a combination of PTFE fibers uniformly dispersed in Delrin® acetal resin. This combination produces a material that has strength, toughness, dimensional stability and good machinability, plus improved wear characteristics over unfilled Delrin®. Delrin® AF Blend, most commonly supplied as a 2:1 blend of Delrin® AF100 and Delrin® 150 resins, has excellent sliding/friction properties.

Bearings made of Delrin® AF Blend sustain high loads when operating at high speeds and show reduced wear. These bearings are also essentially free of slip-stick behavior because the static and dynamic coefficient of friction are closer than with most plastics. Delrin® AF Blend retains much of the strength that is inherent in unmodified Delrin® acetal. Some properties are changed due to the addition of the softer PTFE fiber. The natural color of Delrin® AF Blend is dark brown.

Low moisture absorption
High strength, stiffness
Ideal for machined parts where low friction and long life is important
Easy to machine
Excellent dimensional stability
Enhanced wear and friction properties over standard acetals

Engineering specifications for Delrin® AF Blend Sheet are:

MECHANICAL PROPERTIES ENGLISH VALUES COMMENTS	METRIC VALUES
Specific Gravity 1.5 ASTM D792	1.5
Tensile Strength, psi 8000 ASTM D638	55 MPa
Tensile Modulus, psi 435000 ASTM D638	2,999 MPa
Elongation, % 15 ASTM D638	15 %
Flexural Strength, psi 12000 ASTM D790	83 MPa
Flexural Modulus, psi 445000 ASTM D790	3,068 MPa
Shear Strength, psi 7600 ASTM D732	52 MPa
Compressive Strength, psi 16000 ASTM D695, 10% Def.	110 MPa
Compressive Modulus, psi 350000 ASTM D695	2,413 MPa
Hardness, Rockwell M 85 ASTM D785	85
Hardness, Rockwell R 115 ASTM D785	115
Hardness, Durometer, Shore D Scale 83 ASTM D2240	83
Izod Impact (Notched), ft-lb/in 0.7 ASTM D256 Type A	37 J/m
Coefficient of Friction, Dynamic 0.19 Dry vs. Steel, PTM55007	0.19
Limiting PV, psi-fpm 8300 PTM55007	0.29 MPa-m/sec
k (wear) factor, 10^-10in³-min/lb-ft-hr 60 PTM55007	60 10^-10in³-min/lb-ft-hr
THERMAL PROPERTIES ENGLISH VALUES COMMENTS	METRIC VALUES
Coefficient of Thermal Expansion, 10E-4/°F 0.5 ASTM E831 (TMA)	0.90 10^-4/K
Deflection Temperature 264 psi, ºF 244 ASTM D648	118 °C
Melting Point (Crystalline) Peak, °F 347 ASTM D3418	175 °C
Continuous Service in Air (Max), °F 180 Without Load	82 °C
ELECTRICAL PROPERTIES VALUES COMMENTS	METRIC VALUES
Dielectric Strength, Short Term, Volts/mil 400 ASTM D149(2)	16 kV/mm
Surface Resistance, Ohm/Square 1E+13 Lower Limit; EOS/ESD S11.11	1E+13 Ohm/Square
Dielectric Constant, 1 MHz 3.1 ASTM D150(2)	3.1
Dissipation Factor, 1 MHz 0.01 ASTM D150(2)	0.01
CHEMICAL PROPERTIES ENGLISH VALUES COMMENTS	METRIC VALUES
Water Absorption Immersion, 24 hr., % 0.2 ASTM D570	0.2 %
Water Absorption Immersion Sat, % 1 ASTM D570	1 %
Acids, Weak (acetic, dilute HCl) 2 Limited Service	2
Acids, Strong (conc. HCl or sulfuric) 1 Unnacceptable	1
Alkalies, Weak (dilute NaOH) 3 Acceptable Service	3
Alkalies, Strong (conc. NaOH) 1 Unnacceptable	1
Hydrocarbons, Aromatic (toluene) 3 Acceptable Service	3
Hydrocarbons, Aliphatic (gasoline) 3 Acceptable Service	3
Ketones, Esters (acetone) 3 Acceptable Service	3
Ethers (diethyl ether, THF) 3 Acceptable Service	3
Chlorinated Solvents (methylene chloride) 2 Limited Service	2
Alcohols (methanol, anti-freeze) 3 Acceptable Service	3
Inorganic Salt Solutions (NaCl, KCl) 3 Acceptable Service	3
Continuous Sunlight 2 Limited Service	2
Steam 1 Unnacceptable	1
COMPLIANCE ENGLISH VALUES COMMENTS	METRIC VALUES
Flammability, UL94 (5=V-0; 4=V-1; 3=V-2; 1=HB) 1 (HB) UL94	1
FDA (1=Yes) 0 Not Compliant	0
USDA (1=Yes) 0 Not Compliant	0
NSF (1=Yes) 0 Not Compliant	0
3A-Dairy (1=Yes) 0 Not Compliant	0
Canada AG (1=Yes) 0 Not Compliant	0
USP Class VI (1=Yes) 0 Not Compliant	0

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In general, acetals do not perform as well in abrasive wear applications as nylons. Compensation for moisture related growth generally allows Nylatron® nylons to be used for wet, abrasive applications. If your application requires dimensional consistency in an abrasive, high humidity or submerged environment, Ertalyte® PET-P will often offer improved performance.

Note: “Delrin® is a registered trademark of E.I. du Pont de Nemours and Company.”