Filter Media and Elements
A filter medium and element technology, applied in the field of force and device elements, can solve the problem of reducing the overall efficiency of the turbine
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[0247] Objects and advantages of this invention are further illustrated by the following examples, but the particular materials and amounts thereof recited in these examples, as well as other conditions and details, should not be construed to unduly limit this invention.
[0248] experiment method
[0249] Frazier permeability test
[0250] Using a Frazier penetration tester at 0.5 inches (in) H 2 O(125 Pascal(Pa)) Measures the permeability of media according to ASTM D737.
[0251] Hydrostatic Head Test
[0252] This is the test for bulk water penetration through the media. The test is carried out with TEXTEST FX3000 Hydrostatic Head Tester II, but any tester that meets the standards AATCC 127, BS2,823, DIN 53,886, EDANA120.1-80, INDAIST 80.4, ISO811, ISO 1,420A, JIS L 1,092 B is acceptable. A sample of at least 5.5 inches square (14 cm) is placed in the tester with the upstream side down and then clamped into place. Water pressure was applied to the upstream side of t...
example 1
[0266]Laminated filter media were prepared using the techniques described below. Rolls of 30 gsm polypropylene meltblown filter material were purchased from H&V of Floyd, VA (product number PE13030CA, electrostatically charged as obtained from the supplier). A 42-gsm wet-laid filter material comprising a mixture of glass and bicomponent PET fibers was prepared similarly to Example 6 in U.S. Pat. (from Lauscha Fiber international (Lauscha, Germany)) and 60% TJ04BN bicomponent PET fiber (from Teijin (Osaka, Japan))). 100 gsm of FINON C310NW spunbond support material was purchased from Midwest Filtration of Cincinnati, OH. Sheet properties are listed in Table 1.
[0267] Table 1
[0268]
[0269] The three rolls were laminated so that the meltblown layer was upstream, the wetlaid layer was in the middle, and the spunbond layer was on the bottom. A copolyester hot melt adhesive available under the tradename GRILTEX 9E, a granular adhesive from EMS-Griltech, Switzerland, was...
example 2
[0275] Laminated filter media were prepared using the following technique. Rolls of polypropylene meltblown filter material were purchased from H&V of Floyd, VA (Product No. PE13030CA, electrostatically charged as obtained from the supplier). A 55 gsm wet-laid filter material comprising a mixture of glass and bicomponent fibers was prepared analogously to Example 6 in U.S. Patent No. US 7,314,497 (with the modification that it consisted of 40% B08F microglass fibers (ultrafine glass fibers) from Lauscha Fiber International (Lauscha, Germany)) and 60% TJ04BN 2d x 5mm fibers (from Teijin (Osaka, Japan)). Spunbond support material of FINON C310NW was purchased from Midwest Filtration of Cincinnati, OH. Sheet properties are listed in Table 3.
[0276] table 3
[0277]
[0278] These three rolls of media were supplied to JDX Nippon (Dalton, Georgia) for processing. The layers were laminated by JDZ Nippon with thermal spray adhesive, requiring the minimum amount of adhesive p...
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