An electrically active composite made up of acetal and a non-carbon. nonfiber filler. Hydel ASD provides excellent wear resistance and anti-static properties (surface resistivity of 109 - 1011 ohms/sq). Hydel® ASD can be used for wear applications in assemblies where the prevention and/or the controlled dissipation of static charges is required. Components such as rollers. bushings. gears. hinges. and wear strips used in equipment utilizing semiconductor and electronic devices are ideal candidates for Hydel ASD.
Hydel ASD has the following features:
- Hydel ASD will dissipate static electrical charges at a controlled rate that will not damage sensitive semi-conductor devices.
- Hydel ASD has outstanding wear resistance and will outlast steel. brass. bronze. and aluminum in most applications.
- Hydel ASD is non-sloughing (no conductive particle generation during wear).
- Hydel ASD's natural color is off white and the material is fully colorable.
- Hydel ASD shares the excellent dimensional stability and machinability properties offered by acetal.
ENSITAL SD is a natural copolymer acetal with static dissipative characteristics. Its comparatively low surface and volume resistivities. excellent bearing and wear properties. and toughness make ENSITAL SD an ideal material for moving components experiencing friction. or parts subject to fluid flow contact. ENSITAL SD contains noncarbon. permanently anti-static additives which do not migrate and are not affected by humidity levels.
Acetal SD products are inherently dissipative and electrically stable unlike many other "dissipative" plastic shapes. They do not rely on atmospheric phenomena to activate. nor are surface treatments used to achieve dissipation. Static electricity is dissipated through these products as readily as it is dissipated along the surface. All of these products dissipate 5 KV in less than 2 seconds per Mil-B-81705C. Acetal SD (ESd) is ideal for fixturing used in the manufacturing of hard disk drives or for handling in-process silicon wafers
ESD is an acronym for electrostatic discharge. Many times it is used incorrectly as a term for something that is "electrostatic discharge safe." The terms Anti-Static. Conductive. and Dissipative are all terms that subdivide ESD into more detail.