Filtration media especially useful for filtering fluids associated with wire electron discharge machining (WEDM) processes

Abstract

Fibrous filtration media and methods of making and using the same are provided whereby the media includes a wet-laid nonwoven fibrous web having from about 20 wt.% to about 80 wt.%, based on total weight of fibrous web, of bicomponent staple fibers, and from about 10 wt.% to about 50 wt.%, based on total weight of the fibrous web, of fibrillated lyocell staple fibers. The fibrous web exhibits a wet burst strength of greater than 3 bar, for example between about 3 bar to about 6 bar and is especially suitable for use in filtering process fluids (e.g., water) associated with wire electron discharge machining (WEDM).

Description

technical field [0001] Embodiments disclosed herein relate generally to fibrous filter mats or webs for filtering process fluids. In particular, embodiments disclosed herein relate to fibrous filter media comprising a fibrous web comprising sheath-core bicomponent fibers and fibrillated binder fibers (e.g., fibrillated Lyocell microfibers), said fibrous web has a wet burst strength of 3 bar or more. The fibrous filter media disclosed herein are particularly useful for filtering process fluids (eg, water) associated with wire electrical discharge machining (WEDM) processes. Background technique [0002] Electrical discharge machining (EDM) is a controlled process for shaping conductive materials, typically hard metals, by using electrical discharges. EDM is used to make fixtures, dies, molds, production parts, and other prototypes, which can be used in the aerospace, automotive, and electronics industries, among others. EDM is typically used for complex shapes or small wor...

AI Technical Summary

Problems solved by technology

As ionic materials increase the conductivity of DI water, this can lead to discharge disturbances and processing inaccuracies

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