Acetal EA | Materials | Eclipse Engineering

Acetal | EA

Eclipse EA materials are acetal based polymers similar in properties to nylon. They are high modulus materials useful for back-up rings and wear products. Easily machinable and processed in a wide variety of stock shapes, Eclipse EA materials offer the designer a very cost effective, highly structural product. EA materials can be enhanced with fillers to increase rigidity and to decrease friction and wear. A major advantage of EA materials over other nylon type polymers is its low water absorption rate. This makes Eclipse EA materials a good choice when tight tolerance parts are required and dimensional stability needs to be maintained.

Available Materials

EA036

Acetal, Unfilled – General purpose acetal for use in the applications called out above.

EA037

Acetal, PTFE Filled – For use in moving parts in which low friction and long wear life are important, having excellent sliding and frictional properties. Blends can operate at higher speeds while exhibiting 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.

Notice:

Technical Information, test data and advice provided by Eclipse Engineering are based on information and tests we believe to be reliable and are intended for persons with knowledge and technical skill sufficient to analyze test types and apply adequate safety factors for the given application. Because actual application conditions vary widely, these values are intended for comparitive purposes only and the suitability of this material is ultimately left to the end user.

EA036

On a cost basis, EA036 should be considered a first choice when parts requiring high stiffness and excellent dimensional stability are required. Although EA036 will not degrade at temperatures as high as 300°F (149°C), it should be specified for continuous use below 200°F (93°C). In that range, EA036 offers similar performance to higher priced polymers making it ideal for seal carriers, back-up rings, installation tools, spacers and lantern rings.

EA036 may be specified for FDA, USDA, NSF, Canada AG and 3-A Dairy compliant components. EA036 is easily machinable, but can be injection molded as well making it a candidate when considering a material that can be prototyped at low cost then ramped up to high volume production.

Density	ASTM D792	1.41	g/cc
Strength at Break	ASTM D638	9,500	psi
Elongation at Break	ASTM D638	30	%
Hardness	ASTM D785	M88/R120	Rockwell

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EA037

When exposed to dynamic forces, EA037 is a good upgrade to consider over EA036. With the addition of PTFE dispersed in the base acetal, the dynamic friction is nearly half the unfilled resin. This eliminates stick -slip and increases wear resistance allowing application into wear components such as bushings and wear rings.