# US 2014/0196424 A1 · Filter media including glass fibers

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- Number: US 2014/0196424 A1
- Document ID: US20140196424A1
- Status: Published application
- Kind: A1
- Application number: 14/211,872
- Filed: 2014-03-14
- Published: 2014-07-17
- Earliest claimed: 2010-12-22
- Assignees: Hollingsworth & Vose Company
- Applicants: Hollingsworth & Vose Company
- Inventors: Yuri Vulfson
- Web page: https://patentgrep.com/patent/US20140196424A1

## CPC

- B01D 39/086: {of inorganic material}
- B01D 39/2017: {the material being filamentary or fibrous}
- B01D 39/2082: {the material being filamentary or fibrous}
- C03C 3/093: containing zinc or zirconium
- C03C 4/0014: {Biodegradable glass}
- C03C 4/0035: {for soluble glass for controlled release of a compound incorporated in said glass}
- C03C 13/00: Fibre or filament compositions (manufacture of fibres or filaments C03B37/00)
- B01D 2239/1233: Fibre diameter
- Y10T 428/2916: including boron or compound thereof [not as steel]
- Y10T 442/3984: Strand is other than glass and is heat or fire resistant
- Y10T 442/604: Strand or fiber material is glass
- Y10T 442/623: Microfiber is glass
- 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)
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The present disclosure generally relates to filter media including glass fibers. The fiber characteristics (e.g., composition, dimensions) are selected to impart the desired solubility, filtration and mechanical properties so that the filter media may be used in the desired application.

## Claims

### Claim 1

A filter media comprising:
a fiber web including a plurality of glass fibers having a BaO content of greater than 7.2 wt % and an alumina content of less than 3.0 wt %.

### Claim 2 (depends on 1)

The filter media of claim 1, wherein the glass fibers have an average diameter of less than 3 microns.

### Claim 3 (depends on 1)

The filter media of claim 1, wherein the glass fibers have a B2O3 content of between 5.0 wt % and 15.0 wt %.

### Claim 4 (depends on 1)

The filter media of claim 1, wherein the glass fibers have a B2O3 content of between 8.0 wt % and 15.0 wt %.

### Claim 5 (depends on 1)

The filter media of claim 1, wherein the BaO content is less than 20.0 wt %.

### Claim 6 (depends on 1)

The filter media of claim 1, wherein the BaO content is between 8.0 wt % and 20.0 wt %.

### Claim 7 (depends on 1)

The filter media of claim 1, wherein the glass fibers have an alumina content of between 0.5 wt % and 3.0 wt %.

### Claim 8 (depends on 1)

The filter media of claim 1, wherein the glass fibers have an alumina content of less than 2.5 wt %.

### Claim 9 (depends on 1)

The filter media of claim 1, wherein the glass fibers have an alumina content of between 1.0 wt % and 2.5 wt %.

### Claim 10 (depends on 1)

The filter media of claim 1, wherein the glass fibers have a total alkali oxide content of between 10.0 wt % and 25.0 wt %.

### Claim 11 (depends on 1)

The filter media of claim 1, wherein the glass fibers have a Na2O content of between 6.0 wt % and 25.0 wt %.

### Claim 12 (depends on 1)

The filter media of claim 1, wherein the glass fibers have a K2O content of between 0.5 wt % and 8.0 wt %.

### Claim 13 (depends on 1)

The filter media of claim 1, wherein the glass fibers have a total alkaline earth content of less than 20.0 wt %.

### Claim 14 (depends on 1)

The filter media of claim 1, wherein the glass fibers have a MgO content of between 0.1 wt % and 8.0 wt %.

### Claim 15 (depends on 1)

The filter media of claim 1, wherein the glass fibers have a CaO content of between 0.1 wt % and 15.0 wt %.

### Claim 16 (depends on 1)

The filter media of claim 1, wherein the glass fibers have a silica content of between 45.0 wt % and 80.0 wt %.

### Claim 17 (depends on 1)

The filter media of claim 1, wherein the glass fibers have a ZnO content of between 1.5 wt % and 8.0 wt %.

### Claim 18 (depends on 1)

The filter media of claim 1, wherein the fiber web exhibits a Kdis after 28 days of between 95 ng/hour/cm2 and 200 ng/hour/cm2.

### Claim 19 (depends on 1)

The filter media of claim 1, wherein the glass fibers have an average diameter of greater than 0.1 micron.

### Claim 20 (depends on 19)

A filter element comprising the filter media of claim 19.

### Claim 21

A filter media comprising:
A fiber web including a plurality of glass fibers having a BaO content of greater than 7.2 wt %, an alumina content of less than 10.0 wt % and a B2O3 content of greater than 5.0 wt %.