# US 10,478,758 B2 · Filter media with fibrillated fibers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,478,758 B2 - Document ID: US10478758B2 - Status: Granted - Kind: B2 - Application number: 14/684,726 - Filed: 2015-04-13 - Published: 2015-11-12 - Granted: 2019-11-19 - Earliest claimed: 2010-12-17 - Assignees: Hollingsworth & Vose Company - Applicants: Hollingsworth & Vose Company - Inventors: Juergen Battenfeld; William E. Widrig; Eszter Nofz - Web page: https://patentgrep.com/patent/US10478758B2 ## CPC - B01D 29/03: self-supporting - B01D 35/02: Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks, (B01D35/05 takes precedence; {water pipe system filters E03B3/18, E03B7/07; dirt catchers in sewers E03F; filters or strainers for pipe-lines in general B08B, E03F; object or dirt catching devices in sinks or the like E03C1/26; suction strainers or filters for pumps F04B53/005, F04D29/70}) - B01D 39/18: the material being cellulose or derivatives thereof ({cork or peat B01D39/1646} ; making filter paper D21F11/14) - B01D 39/2017: {the material being filamentary or fibrous} - D04H 1/4218: Glass fibres - D04H 1/4258: Regenerated cellulose series - B01D 2239/0636: Two or more types of fibres present in the filter material - B01D 2239/1291: Other parameters - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - D04H: MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL (weaving D03; knitting D04B; braiding D04C; net-making D04G; sewing D05B; tufting D05C; finishing non-woven fabrics D06); FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING {; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION}(non-woven fabrics having an intermediate or external layer of a different kind, e.g. of woven fabric, B32B) ## Abstract Filter media suitable for various applications (e.g., hydraulic) and related components, systems, and methods associated therewith are described. The filter media may include a fiber web having a mixture of glass fibers and fibers that are fibrillated. The fibrillated fibers, for example, may be formed of lyocell. ## Claims ### Claim 1 A filter media comprising: a fiber web including glass fibers and fibrillated fibers, the fiber web having a basis weight of between about 10 and about 1000 g/m2 and a thickness of between about 0.10 mm and about 50.0 mm, wherein the average Canadian Standard Freeness level of fibrillation of the fibrillated fibers is between 100 and 850, wherein the fiber web has a mean flow pore size of between about 5 microns and 20 microns. ### Claim 2 (depends on 1) The filter media of claim 1, wherein the average Canadian Standard Freeness level of fibrillation is between about 100 and about 600. ### Claim 3 (depends on 1) The filter media of claim 1, wherein the average Canadian Standard Freeness level of fibrillation is between about 200 and about 400. ### Claim 4 (depends on 1) The filter media of claim 1, wherein the fibrillated fibers comprise between about 5% and about 60% by weight of the fiber web. ### Claim 5 (depends on 1) The filter media of claim 1, wherein the fibrillated fibers comprise between about 5% and about 30% by weight of the fiber web. ### Claim 6 (depends on 1) The filter media of claim 1, further comprising synthetic fibers. ### Claim 7 (depends on 1) The filter media of claim 1, wherein the glass fibers comprise between about 40% and about 90% by weight of the fiber web. ### Claim 8 (depends on 1) The filter media of claim 1, wherein the glass fibers comprise chopped strand fibers, wherein the chopped strand fibers comprise less than about 30% by weight of the fiber web. ### Claim 9 (depends on 1) The filter media of claim 1, wherein the glass fibers comprise microglass fibers, wherein the microglass fibers comprise between about 40% and about 90% by weight of the fiber web. ### Claim 10 (depends on 1) The filter media of claim 1, wherein the fiber web has a tensile elongation in a cross-machine direction of greater than about 1% and a tensile elongation in a machine direction of greater than about 0.8%. ### Claim 11 (depends on 1) The filter media of claim 1, wherein the fiber web has a Schopper burst strength of greater than about 15 kPa. ### Claim 12 (depends on 1) The filter media of claim 1, wherein the fiber web has a tensile strength in a cross-machine direction of greater than about 3 N/15 mm and a tensile strength in a machine direction of greater than about 4 N/15 mm. ### Claim 13 (depends on 1) The filter media of claim 1, wherein the fiber web comprises a beta efficiency ratio of greater than about 200 for particles having an average diameter of greater than about 3 microns. ### Claim 14 (depends on 1) The filter media of claim 1, wherein the fiber web has an air permeability of between about 2 cfm/sf and about 215 cfm/sf. ### Claim 15 (depends on 1) The filter media of claim 1, wherein the fiber web comprises a beta efficiency ratio that increases or remains constant over greater than 60% of an entire test period in which the fiber web is subject to a multipass filter test. ### Claim 16 (depends on 1) A filter element comprising the filter media of claim 1. ### Claim 17 (depends on 1) A hydraulic filter element comprising the filter media of claim 1.