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A reinforced silt retention sheet and systems for silt retention are provided. The reinforced silt retention sheet includes a non-woven fabric having a series of entangled polymer fibers with a reinforcing material secured within the fabric. The resultant reinforced silt retention sheet further can

A reinforced silt retention sheet and systems for silt retention are provided. The reinforced silt retention sheet includes a non-woven fabric having a series of entangled polymer fibers with a reinforcing material secured within the fabric. The resultant reinforced silt retention sheet further can have openings of a desired size to enable filtering of a flow of fluid passing through the reinforced silt retention sheet.

대표청구항 ▼

What is claimed is: 1. A reinforced silt retention sheet arranged above ground, for use in a silt management application, comprising: a flexible, water permeable, nonwoven fabric comprising a plurality of entangled polymer fibers; and a reinforcing material or element extending along the nonwoven f

What is claimed is: 1. A reinforced silt retention sheet arranged above ground, for use in a silt management application, comprising: a flexible, water permeable, nonwoven fabric comprising a plurality of entangled polymer fibers; and a reinforcing material or element extending along the nonwoven fabric and adapted to support and prevent ripping or tearing of the silt retention sheet secured within the entangled polymer fibers without substantially being bonded thereto, the reinforcing material or element being arranged spaced in non-overlapping intervals in the warp and/or fill direction of the nonwoven fabric, wherein the silt retention sheet has a maximum apparent opening size of less than about 0.6 millimeters as measured by ASTM D-4751. 2. The silt retention sheet of claim 1, wherein the nonwoven fabric comprises a spunbond polyester having a basis weight of from about 1 to about 8 ounces per square yard. 3. The silt retention sheet of claim 1, wherein the nonwoven fabric comprises a spunbond polypropylene fabric, a spunbond polyester fabric, spunbond polyethylene terephthalate fabric, a needle punched polyester fabric, a needlepunched polyethylene terephthalate fabric, a needlepunched spunbond polyethylene terephthalate fabric, or any combination thereof. 4. The silt retention sheet of claim 1, wherein the reinforcing material comprises a fiberglass scrim having a mesh size of from about 0.1 inches to about 0.5 inches. 5. The silt retention sheet of claim 1, having a tensile strength of at least about 75 lbs, as measured according to ASTM D-4632. 6. The silt retention sheet of claim 1, having a standard concentration reduction in turbidity of at least about 58% as measured according to ASTM D-5141-96(2004). 7. The silt retention sheet of claim 1, having a double concentration reduction in turbidity of at least about 55% as measured according to ASTM D-5141-96(2004). 8. The silt retention sheet of claim 1, having a standard concentration filtering efficiency of at least about 90% as measured according to modified ASTM D-5141-96(2004). 9. The silt retention sheet of claim 1, having a double concentration filtering efficiency of at least about 92% as measured according to modified ASTM D-5141-96(2004). 10. The silt retention sheet of claim 1, formed by the process comprising: (a) forming a layer of the entangled polymeric fibers; (b) overlying the entangled polymeric fibers with the reinforcing material; and (c) overlying the reinforcing material with additional entangled polymeric fibers. 11. The silt retention sheet of claim 10, formed by the process further comprising: (d) heating the sheet to form bonds between the entangled polymeric fibers without substantially bonding the entangled polymeric fibers to the reinforcing material. 12. The silt retention sheet of claim 10, formed by the process further comprising: (d) selecting the polymeric fibers to have a lower softening point than a softening point of the reinforcing material; and (e) heating the sheet to a temperature above the softening point of the entangled polymeric fibers but below the softening point of the reinforcing material. 13. The silt retention sheet of claim 1, wherein the reinforcing material comprises a plurality of strands formed from at least one of polypropylene, polyester, nylon 6, 6, yarn, cord material, fiberglass, aramid fibers, and combinations thereof. 14. The silt retention sheet of claim 1 and wherein the reinforcing material comprises a series of strands aligned in proximity so as to form reinforcing elements at spaced locations along the non-woven fabric. 15. The silt retention sheet of claim 1 and further comprising ground supports attached to the reinforcing material. 16. The reinforced silt retention sheet as claimed in claim 15, further comprising an attachment means for attaching the ground supports to the reinforcing material wherein the reinforcing material further functions as an attachment point for the ground supports. 17. The silt retention sheet as claimed in claim 16, wherein the attachment means are selected from the group consisting of staples, pins, nails, rings, clips, adhesives, hook and loop fasteners, and combinations thereof. 18. The silt retention sheet of claim 1 and wherein the reinforcing material comprises a polymer material entangled within the polymer fibers of the non-woven fabric. 19. The silt retention sheet as claimed in claim 1, wherein the reinforcing element is comprised of a plurality of reinforcing strands or strips that form a band. 20. A reinforced silt retention sheet comprising a flexible, water permeable non-woven fabric sheet material including a plurality of non-woven polymer fibers and reinforcing elements formed from a resilient, tear resistant material and interspersed along said fabric sheet material to provide said fabric sheet material with enhanced strength and resistance to tearing, wherein the reinforced silt retention sheet has an apparent sieve opening size of less than approximately 0.6 mm as measured according to ASTM D-4751 to provide filtering efficiency for sediment control applications, and has an ultimate tensile strength ranging from about 100 lbs to 350 lbs in the warp direction and an ultimate tensile strength ranging from about 75 lbs to 450 lbs in the fill direction. 21. The reinforced silt retention sheet of claim 20, and wherein said fabric sheet comprises a spin bond material having a denier of approximately 1 dpf to approximately 10 dpf. 22. The reinforced silt retention sheet of claim 20, wherein the silt retention sheet is a silt retention fence. 23. A reinforced silt retention sheet arranged above ground, for use in a silt management application, comprising: a flexible, water permeable, nonwoven fabric comprising a plurality of entangled polymer fibers; and a reinforcing material secured within the entangled polymer fibers without being bonded thereto, the reinforcing material being spaced in discontinuous and non-overlapping intervals in the warp and fill direction, wherein the silt retention sheet has a maximum apparent opening size of less than about 0.6 millimeters as measured by ASTM D-4751. 24. The reinforced silt retention sheet as claimed in claim 23, wherein the reinforced silt retention sheet has an ultimate tensile strength ranging from about 100 lbs to 350 lbs in the warp direction and an ultimate tensile strength ranging from about 75 lbs to 450 lbs in the fill direction.