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

A filter medium, electronic discharge technology, applied in filtration and separation, membrane filters, separation devices, etc., can solve the problems of inaccurate processing, discharge interference, etc., and achieve the effect of long service life, high porosity, and low release.

Active Publication Date: 2020-11-24
奥斯龙明士克公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Embodiment 1 (medium of the present invention)

[0079] Monolayer media were produced with the fiber composition shown in the table below. No wet end chemicals were used other than the fibers shown in the table below. Additionally, the formed media was subjected to heated zone calendering in the absence of any added binder resin.

[0080] Example 1: Cellulosic Component

[0081] fiber type % by weight*

[0082] Teijin PET fiber 0.3dtex*5mm 25% by weight Lenzing Tencel fiber 1.7dtex*4mm 20% by weight Huvis PET two-component fiber LMF 4 denier * 6mm 30% by weight Fibrillated Lyocell Staple Fiber 25% by weight

[0083] *Based on total fiber weight

Embodiment 2

[0084] Embodiment 2 (medium of the present invention)

[0085] Two-layer media were produced with the fiber composition shown in the table below (% by weight based on total fiber weight in the media). No wet end chemicals were used other than the fibers shown in the table below. Additionally, the formed media was subjected to heated zone calendering in the absence of any added binder resin.

[0086] Example 2: Fiber Components

[0087] Top layer – 25g / m 2 , 35.7% by weight or total media basis weight

[0088] fiber type % by weight*

[0089] Eastman PET Cyphrex 10001 0.06dtex*1.5mm 30% by weight Huvis PET two-component fiber LMF 4 denier * 6mm 30% by weight Fibrillated Lyocell Staple Fiber 40% by weight

[0090] *Based on total weight of fibers in top layer

[0091] Bottom layer – 45g / m 2 , 64.3% by weight or total media basis weight

[0092] fiber type weight percentage

[0093] Toray PET fiber 0.8d*5mm 45% by weight ...

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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...

Claims

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Application Information

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IPC IPC(8): B01D39/18B01D39/16
CPCB01D39/163B01D39/18B01D2239/0216B01D2239/1225B01D2239/1233B01D2239/1291B23H1/10B01D2239/0407B01D2239/0457B01D2221/14
Inventor J.沈M.姜J.金X.曾K.刘
Owner 奥斯龙明士克公司
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