Group: Donaldson Company
Catalog excerpts
¿si Donaldson, ADSORBENT LABEL FILTRATION SOLUTIONS FILTER (ALF) Disk Drive The Adsorbent Label Filter (ALF) is comprised of a filtration membrane, adsorbent element, and pressure-sensitive adhesive for securing the filter to the inside of the drive. The ALF is designed to provide protection from hydrocarbons, humidity, and acid gases in a thin label format. The high efficiency filtration membrane encapsulates the adsorbent element while remaining permeable to gaseous contamination. The adsorbent element is specially formulated to control humidity and to adsorb acid gases and hydrocarbons from internal and external sources. The most common adsorbents and their associated functions are as follows: • Activated Carbon: Relative humidity control and adsorption of hydrocarbons • Chemically Treated Activated Carbon: Relative humidity control and adsorption of acid gases and hydrocarbons Silica Gel: Relative humidity control The ALF is attached to the inside of the drive and is ideally suited for applications requiring a low-profile filter. Because the adsorption mechanism is diffusion-based, the label can be located anywhere inside the disk drive assembly. When using an ALF filter, it is recommended that diffusion protection be incorporated into the drive. Diffusion protection reduces the amount of hydrocarbons, water vapor, and acid gases entering the drive from the surrounding environment. Adsorbent Material
Open the catalog to page 1ADSORBENT LABEL FILTER (ALF) PRODUCT GUIDELINES AND SPECIFICATIONS Porous Membrane MVTR (Moisture ncn , , .OT.,rn, Vapor Transmission Rate) 950 9/m2/24-hour min™ Per AS™ wet cup Contamination Control Available on a silicone-free release liner. Adhered with a permanent high-temperature, low-outgassing, pressure-sensitive adhesive. Designed to pass the most stringent cleanliness specifications. Manufactured in a cleanroom environment RELATIVE HUMIDITYTEST Time (hours) Adsorbent Filter Contact Donaldson today for more information! Disk Drive Adsorbent Label Filter (07/10) © 2010 Donaldson...
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