# US 12,000,098 B2 · Silt fence configured for capturing pollutants and fabric forming the same

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- Number: US 12,000,098 B2
- Document ID: US12000098B2
- Status: Granted
- Kind: B2
- Application number: 17/963,003
- Filed: 2022-10-10
- Published: 2023-02-02
- Granted: 2024-06-04
- Earliest claimed: 2016-06-14
- Assignees: Mkb Company; Huesker, Inc.
- Applicants: MKB Company, LLC; Huesker, Inc.
- Inventors: Michael A. Zock; Roy G. McClinton
- Web page: https://patentgrep.com/patent/US12000098B2

## CPC

- E01F 7/02: Snow fences or similar devices, e.g. devices affording protection against sand drifts or side-wind effects (fences in general E04H17/00)
- B32B 3/08: characterised by added members at particular parts {(layer formed of separate pieces of material which are juxtaposed side-by-side B32B3/14, B32B3/18)}
- B32B 5/022: {Non-woven fabric}
- B32B 5/024: {Woven fabric}
- B32B 5/06: characterised by a fibrous {or filamentary} layer {mechanically connected, e.g. by needling} to another layer, e.g. of fibres, of paper
- B32B 5/26: another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)}
- B32B 7/023: Optical properties
- C02F 1/004: {using large scale industrial sized filters}
- E02B 3/023: {Removing sediments (in barrages or reservoirs E02B8/02)}
- E02D 17/20: Securing of slopes or inclines {(by soil E02D3/12; protection against snowslides or avalanches E01F7/04, E01F15/00; securing banks or like surfaces facing on bodies of water E02B3/12)}
- E02D 17/202: {with flexible securing means}
- E02D 29/02: Retaining or protecting walls (piers or quay walls E02B3/06)
- E02D 31/06: against corrosion by soil or water
- B32B 2250/03: 3 layers
- B32B 2250/20: All layers being fibrous or filamentary
- B32B 2262/0253: Polyolefin fibres
- B32B 2262/06: Vegetal fibres
- B32B 2307/718: Weight, e.g. weight per square meter
- Y02A 20/204: Keeping clear the surface of open water from oil spills
- E01F: ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)
- E02B: HYDRAULIC ENGINEERING (ship-lifting E02C; dredging E02F)
- E02D: FOUNDATIONS; EXCAVATIONS; EMBANKMENTS (specially adapted for hydraulic engineering E02B); UNDERGROUND OR UNDERWATER STRUCTURES {(tunnels, tunnelling, mining E21)}
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE

## Abstract

A composite silt fence configured for capturing pollutants in one embodiment comprises a silt fence fabric including i) a polymeric geotextile fabric particulate filtering layer defining the hydraulic flow capacity for the silt fence, ii) a pollutant capturing layer coupled to the polymeric geotextile fabric particulate filtering layer and configured to capture some select pollutants in water from flow that has passed through the polymeric geotextile fabric particulate filtering layer, and iii) a backing layer coupled to the pollutant capturing layer; and a plurality of stakes secured to the silt fence fabric at spaced locations. The silt fence fabric yields higher hydraulic flow than existing fence constructions with greater sediment retention and pollutant containment features.

## Claims

### Claim 1

A composite silt fence fabric configured to be coupled to stakes to form a composite silt fence, the fabric comprising:
a polymeric geotextile fabric particulate filtering layer extending substantially an entire width and length of the composite silt fence fabric and defining a hydraulic flow capacity for the silt fence, wherein the polymeric geotextile fabric particulate filtering layer is one of i) a nonwoven material and ii) a woven material;
a pollutant capturing layer coupled to the polymeric geotextile fabric particulate filtering layer and extending substantially the entire width and length of the composite silt fence fabric so as to substantially entirely overlay the polymeric geotextile fabric particulate filtering layer and configured to capture some select pollutants in water from flow that has passed through the polymeric geotextile fabric particulate filtering layer through absorption or adsorption; and
a backing layer coupled to the pollutant capturing layer extending substantially the entire width and length of the composite silt fence fabric so as to substantially entirely overlay the pollutant capturing layer.

### Claim 2 (depends on 1)

The composite silt fence fabric according to claim 1 wherein performing standard ASTM testing on a silt fence formed with the composite silt fence fabric with 1645 LBS water with 105 LBS soil and 250 mg/L Oil for a 75 minutes test run yields a soil retention after the test run of greater than 85%.

### Claim 3 (depends on 2)

The composite silt fence fabric according to claim 2 wherein the test run yields a soil retention after the test run of greater than 90%.

### Claim 4 (depends on 1)

The composite silt fence fabric according to claim 1 wherein performing standard ASTM testing on a silt fence formed with the composite silt fence fabric with 1645 LBS water with 105 LBS soil and 250 mg/L Oil for a 75 minutes test run yields a seepage rate after the test run of greater than 60%.

### Claim 5 (depends on 4)

The composite silt fence fabric according to claim 4 wherein the test run yields a seepage rate after the test run of greater than 65%.

### Claim 6 (depends on 1)

The composite silt fence fabric according to claim 1 wherein performing standard ASTM testing on a silt fence formed with the composite silt fence fabric with 1645 LBS water with 105 LBS soil and 250 mg/L Oil for a 75 minutes test run yields an oil retention rate after the test run of greater than 90%.

### Claim 7 (depends on 6)

The composite silt fence fabric according to claim 6 wherein the test run yields an oil retention rate after the test run of greater than 95%.

### Claim 8

A composite silt fence comprising:
a plurality of spaced stakes; and
a composite fabric coupled to the stakes, the fabric including:
i) a polymeric geotextile fabric particulate filtering layer extending substantially an entire width and length of the composite silt fence fabric and defining a hydraulic flow capacity for the silt fence, wherein the polymeric geotextile fabric particulate filtering layer is one of i) a nonwoven material and ii) a woven material;
ii) a pollutant capturing layer coupled to the polymeric geotextile fabric particulate filtering layer and extending substantially the entire width and length of the composite silt fence fabric so as to substantially entirely overlay the polymeric geotextile fabric particulate filtering layer and configured to capture some select pollutants in water from flow that has passed through the polymeric geotextile fabric particulate filtering layer through absorption or adsorption; and
iii) a backing layer coupled to the pollutant capturing layer extending substantially the entire width and length of the composite silt fence fabric so as to substantially entirely overlay the pollutant capturing layer.

### Claim 9 (depends on 8)

The composite silt fence according to claim 8 wherein the polymeric geotextile fabric particulate filtering layer is a non-woven polypropylene particulate filtering layer having at least a 2 ounce rating.

### Claim 10 (depends on 8)

The composite silt fence according to claim 8 wherein the backing layer is a 200-300 g/m2 polyethylene layer.

### Claim 11 (depends on 8)

The composite silt fence according to claim 8 wherein the pollutant capturing layer is formed including a kenaf material and wherein the backing layer is a 200-300 g/m2 polyethylene layer.

### Claim 12 (depends on 11)

The composite silt fence according to claim 11 wherein the pollutant capturing layer is at least one of 1-25 mm in thickness or 60-80 gram/sq. ft.

### Claim 13 (depends on 12)

The composite silt fence according to claim 12 wherein the layers of the silt fence fabric are needle punched together.

### Claim 14 (depends on 8)

The composite silt fence according to claim 8 wherein the silt fence fabric has a width of 20″-48″ and is rollable.

### Claim 15 (depends on 8)

The composite silt fence according to claim 8 wherein the pollutant capturing layer is thermally bonded to the polymeric geotextile fabric filtering layer.

### Claim 16

A composite silt fence comprising:
a plurality of spaced stakes; and
a composite fabric coupled to the stakes, the fabric including:
i) a polymeric geotextile fabric particulate filtering layer extending substantially an entire width and length of the composite silt fence fabric and defining a hydraulic flow capacity for the silt fence, wherein the polymeric geotextile fabric particulate filtering layer is a nonwoven material;
ii) a pollutant capturing layer coupled to the polymeric geotextile fabric particulate filtering layer and extending substantially the entire width and length of the composite silt fence fabric so as to substantially entirely overlay the polymeric geotextile fabric particulate filtering layer and configured to capture some select pollutants in water from flow that has passed through the polymeric geotextile fabric particulate filtering layer through absorption or adsorption; and
iii) a backing layer coupled to the pollutant capturing layer extending substantially the entire width and length of the composite silt fence fabric so as to substantially entirely overlay the pollutant capturing layer, wherein the polymeric geotextile fabric particulate filtering layer and the pollutant capturing layer and the backing layer are needle punched together.

### Claim 17 (depends on 16)

The composite silt fence according to claim 16 wherein the pollutant capturing layer is 1-25 mm in thickness.

### Claim 18 (depends on 16)

The composite silt fence according to claim 16 wherein the pollutant capturing layer is 60-80 gram/sq. ft.

### Claim 19 (depends on 18)

The composite silt fence according to claim 18 wherein performing standard ASTM testing on the silt fence with 1645 LBS water with 105 LBS soil and 250 mg/L Oil for a 75 minutes test run yields a yields an oil retention rate after the test run of greater than 90%.

### Claim 20 (depends on 19)

The composite silt fence according to claim 19 wherein the test run yields an oil retention rate after the test run of greater than 95%.