IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0352439
(2006-02-10)
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등록번호 |
US-7681353
(2010-04-21)
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우선권정보 |
CA-2535801(2006-02-09) |
발명자
/ 주소 |
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출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
75 |
초록
▼
In one aspect there is provided an erosion control medium formed from a blended mulch product which can be mixed with water and spray-applied to a ground surface to form the erosion control medium, comprising: about 75% to about 92% by weight ligno-cellulosic fibers; about 1% to about 10% by weight
In one aspect there is provided an erosion control medium formed from a blended mulch product which can be mixed with water and spray-applied to a ground surface to form the erosion control medium, comprising: about 75% to about 92% by weight ligno-cellulosic fibers; about 1% to about 10% by weight substantially straight synthetic fibers; and a tackifier; wherein the substantially straight synthetic fibers maintain their substantially straight form in the blended mulch product and the erosion control medium. Also provided are slurries in which the blended mulch product is mixed with water to produce the slurry, the slurry is spray-applied to a ground surface and the slurry dries on the ground surface to form an erosion control medium.
대표청구항
▼
What is claimed is: 1. An erosion control medium for reducing erosion of a ground surface, formed from the dried spray-application on the ground surface of a slurry comprising a blended mulch product and water, the erosion control medium comprising: (a) ligno-cellulosic fibers; (b) substantially st
What is claimed is: 1. An erosion control medium for reducing erosion of a ground surface, formed from the dried spray-application on the ground surface of a slurry comprising a blended mulch product and water, the erosion control medium comprising: (a) ligno-cellulosic fibers; (b) substantially straight synthetic fibers each having a straight ratio (Dnot:Dmax) of at least about 3:5 to about 1:1; wherein Dmax represents a maximum potential distance of a particular synthetic fiber having a first end point and a second end point, with the first and second end points located at opposing ends of an elongated portion of the particular synthetic fiber, the maximum potential distance being measured along the elongated portion of the particular synthetic fiber when the particular synthetic fiber is completely straight; and wherein Dnot represents a notional shortest distance between said end points; and (c) a tackifier; wherein the erosion control medium forms a substantially homogenous open weave matrix on the ground surface and wherein the presence of the substantially straight synthetic fibers does not increase a dry tensile strength of the erosion control medium as compared to an erosion control medium without the substantially straight synthetic fibers. 2. The erosion control medium of claim 1, wherein the presence of the substantially straight synthetic fibers in the erosion control medium increases a modulus of elasticity of the erosion control medium as compared to an erosion control medium without the substantially straight synthetic fibers. 3. The erosion control medium of claim 1, wherein the presence of the substantially straight synthetic fibers in the erosion control medium increases a wet tensile strength of the erosion control medium as compared to an erosion control medium without the substantially straight synthetic fibers. 4. The erosion control medium of claim 1, wherein the presence of the substantially straight synthetic fibers in the erosion control medium increases a tensile strength that is retained in the erosion control medium when rewetted, as compared to an erosion control medium without the substantially straight synthetic fibers. 5. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers are each monofilament fibers that are sufficiently resistant to crimping so as to reduce entanglement of fibers in the erosion control medium, as compared to an erosion control medium having crimped synthetic fibers. 6. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers are each monofilament fibers that are sufficiently resistant to crimping so as to avoid interlocking between substantially straight synthetic fibers. 7. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers are each monofilament fibers that are sufficiently resistant to crimping so as to resist entanglement in the erosion control medium. 8. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers are each monofilament fibers that are sufficiently short in length so as to reduce entanglement of fibers in the erosion control medium, as compared to an erosion control medium having crimped synthetic fibers. 9. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers are each monofilament fibers that are sufficiently short in length so as to resist entanglement of fibers in the erosion control medium. 10. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers are monofilament fibers. 11. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers are a thermoplastic. 12. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers are selected from at least one of the group consisting of: a polyolefin, a polyester, a polyamide and a mixture thereof. 13. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers are polypropylene fibers. 14. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers are polyethylene fibers. 15. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers are polyester fibers. 16. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers are polyamide fibers. 17. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers are a mixture of fibers selected from at least two of the group consisting of: polypropylene fibers, polyethylene fibers, polyester fibers, and polyamide fibers. 18. The erosion control medium of claim 1, wherein each of the substantially straight synthetic fibers have an elongated portion having a length of between about 0.375 inches to about 0.625 inches. 19. The erosion control medium of claim 1, wherein substantially all of the substantially straight synthetic fibers each have a denier measurement of about 4 denier to about 8 denier. 20. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers each have a straight ratio (Dnot:Dmax) of at least about 3:4 to about 1:1; wherein Dmax represents a maximum potential distance of a particular synthetic fiber having a first end point and a second end point, with the first and second end points located at opposing ends of an elongated portion of the particular synthetic fiber, the maximum potential distance being measured along the elongated portion of the particular synthetic fiber when the particular synthetic fiber is completely straight; and wherein Dnot represents a notional shortest distance between said end points. 21. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers each have a straight ratio of (Dnot:Dmax) of at least about 9:10 to about 1:1; wherein Dmax represents a maximum potential distance of a particular synthetic fiber having a first end point and a second end point, with the first and second end points located at opposing ends of an elongated portion of the particular synthetic fiber, the maximum potential distance being measured along the elongated portion of the particular synthetic fiber when the particular synthetic fiber is completely straight; and wherein Dnot represents a notional shortest distance between said end points. 22. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers do not have bends of between about 1 degree to about 90 degrees. 23. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers do not have bends of between about 1 degree to about 130 degrees. 24. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers do not have bends of between about 1 degree to about 175 degrees. 25. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers a tensile modulus of at least about 84,000 psi. 26. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers have a flexural modulus of at least about 131,000 psi. 27. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers have a tensile modulus of at least about 84,000 psi, and flexural modulus of at least about 131,000 psi. 28. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers have a tensile modulus of at least about 84,000 psi, a flexural modulus of at least about 131,000 psi, and a denier measurement of about 4 denier to about 8 denier. 29. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers have a tensile modulus of at least about 84,000 psi, a flexural modulus of at least about 200,000 psi, and a denier measurement of about 4 denier to about 8 denier. 30. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers have a tensile modulus of about 84,000 psi, a flexural modulus of about 200,000 psi, and a denier measurement of about 4.5 denier to about 7 denier. 31. The erosion control medium of claim 1, wherein the erosion control medium comprises about 2% to about 4% by weight of the substantially straight synthetic fibers. 32. The erosion control medium of claim 1, wherein each of the ligno-cellulosic fibers have a length of between about 0.125 inches and about 1 inch. 33. The erosion control medium of claim 1, wherein each of the ligno-cellulosic fibers have a diameter of between about 0.01 mm to about 0.22 mm. 34. The erosion control medium of claim 1, wherein the ligno-cellulosic fibers are softwood fibers. 35. The erosion control medium of claim 1, wherein the tackifier is a hydrocolloid based binder. 36. The erosion control medium of claim 1, wherein the tackifier comprises guar gum. 37. An erosion control medium for reducing erosion of a ground surface, formed from the dried spray-application on the ground surface of a slurry mixture comprising a blended mulch product and water, the erosion control medium comprising: (a) about 80% to about 90% by weight ligno-cellulosic fibers; (b) about 1% to about 7% by weight substantially straight synthetic fibers; and (c) a tackifier; wherein the erosion control medium forms a substantially homogenous open weave matrix on the ground surface and wherein the presence of the substantially straight synthetic fibers does not increase a dry tensile strength of the erosion control medium as compared to an erosion control medium without the substantially straight synthetic fibers. 38. The erosion control medium of claim 37, wherein the presence of the substantially straight synthetic fibers in the erosion control medium increases a modulus of elasticity of the erosion control medium as compared to an erosion control medium without the substantially straight synthetic fibers. 39. The erosion control medium of claim 37, wherein the presence of the substantially straight synthetic fibers in the erosion control medium increases a wet tensile strength of the erosion control medium as compared to an erosion control medium without the substantially straight synthetic fibers. 40. The erosion control medium of claim 37, wherein the presence of the substantially straight synthetic fibers in the erosion control medium increases a tensile strength that is retained in the erosion control medium when rewetted, as compared to an erosion control medium without the substantially straight synthetic fibers. 41. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers are each monofilament fibers that are sufficiently resistant to crimping so as to reduce entanglement of fibers in the erosion control medium, as compared to an erosion control medium having crimped synthetic fibers. 42. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers are each monofilament fibers that are sufficiently resistant to crimping so as to avoid interlocking between substantially straight synthetic fibers. 43. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers are each monofilament fibers that are sufficiently resistant to crimping so as to resist entanglement in the erosion control medium. 44. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers are each monofilament fibers that are sufficiently short in length so as to reduce entanglement of fibers in the erosion control medium, as compared to an erosion control medium having crimped synthetic fibers. 45. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers are each monofilament fibers that are sufficiently short in length so as to resist entanglement of fibers in the erosion control medium. 46. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers are polypropylene fibers. 47. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers are polyethylene fibers. 48. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers are polyester fibers. 49. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers are polyamide fibers. 50. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers are a mixture of fibers selected from at least two of the group consisting of: polypropylene fibers, polyethylene fibers, polyester fibers, and polyamide fibers. 51. The erosion control medium of claim 37, wherein each of the substantially straight synthetic fibers have an elongated portion having a length of between about 0.375 inches to about 0.625 inches. 52. The erosion control medium of claim 37, wherein substantially all of the substantially straight synthetic fibers each have a denier measurement of about 4 denier to about 8 denier. 53. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers each have a straight ratio (Dnot:Dmax) of at least about 3:5 to about 1:1; wherein Dmax represents a maximum potential distance of a particular synthetic fiber having a first end point and a second end point, with the first and second end points located at opposing ends of an elongated portion of the particular synthetic fiber, the maximum potential distance being measured along the elongated portion of the particular synthetic fiber when the particular synthetic fiber is completely straight; and wherein Dnot represents a notional shortest distance between said end points. 54. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers each have a straight ratio Dnot: Dmax) of at least about 3:4 to about 1:1; wherein Dmax represents a maximum potential distance of a particular synthetic fiber having a first end point and a second end point, with the first and second end points located at opposing ends of an elongated portion of the particular synthetic fiber, the maximum potential distance being measured along the elongated portion of the particular synthetic fiber when the particular synthetic fiber is completely straight; and wherein Dnot represents a notional shortest distance between said end points. 55. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers each have a straight ratio of (Dnot:Dmax) of at least about 9:10 to about 1:1; wherein Dmax represents a maximum potential distance of a particular synthetic fiber having a first end point and a second end point, with the first and second end points located at opposing ends of an elongated portion of the particular synthetic fiber, the maximum potential distance being measured along the elongated portion of the particular synthetic fiber when the particular synthetic fiber is completely straight; and wherein Dnot represents a notional shortest distance between said end points. 56. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers do not have bends of between about 1 degree to about 90 degrees. 57. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers do not have bends of between about 1 degree to about 130 degrees. 58. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers do not have bends of between about 1 degree to about 175 degrees. 59. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers have a flexural modulus of at least about 200000 psi. 60. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers have a flexural modulus of at least about 200000 psi and a denier measurement of about 4 denier to about 8 denier. 61. The erosion control medium of claim 37, wherein the substantially straight synthetic fibers have a flexural modulus of about 200000 psi and a denier measurement of about 4.5 denier to about 7 denier. 62. The erosion control medium of claim 37, wherein the erosion control medium comprises about 2% to about 4% by weight of the substantially straight synthetic fibers. 63. The erosion control medium of claim 37, wherein each of the ligno-cellulosic fibers have a length of between about 0.125 inches and about 1 inch. 64. The erosion control medium of claim 37, wherein each of the ligno-cellulosic fibers have a diameter of between about 0.01 mm to about 0.22 mm. 65. The erosion control medium of claim 37, wherein the ligno-cellulosic fibers are softwood fibers. 66. The erosion control medium of claim 37, wherein the tackifier comprises guar gum. 67. The erosion control medium of claim 1 prepared by a process comprising: a) mixing a blended mulch product with water thereby forming a slurry, the blended mulch product comprising: (i) about 75% to about 92% by weight ligno-llulosic fibers; (ii) about 1% to about 10% by weight substantially straight synthetic fibers; and (iii) a tackifier; b) spray-applying the slurry to a ground surface thereby forming an applied slurry; and c) drying the applied slurry. 68. The erosion control medium prepared by the process of claim 67, wherein the process further comprises a second spray-application of the slurry. 69. The erosion control medium prepared by the process of claim 68, wherein the second spray-application is applied in a different direction as compared to a direction of a first spray application. 70. The erosion control medium prepared by the process of claim 67, wherein the slurry is spray applied to form an applied slurry having a thickness of about 0.1 inches to about 0.2 inches. 71. The erosion control medium prepared by the process of claim 67, wherein the slurry is spray applied to form an applied slurry having a thickness of about 0.125 inches. 72. The erosion control medium of claim 1, wherein the substantially straight synthetic fibers are each monofilament fibers having a homogeneous cross-section.
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