EP0235853A1
Expired / Lapsed
EP
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Supporting fabric for bearing bulk material and a method of building a road embankment, a dam, a concrete structure or some other body formed of bulk material
Assignee: Akzo NV
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Filing: 1987-02-18
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Granted: —
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Expires: 2007-02-18
Abstract
Abstract The invention relates to supporting fabric, such as a woven fabric, a knitted fabric, a web or a deposition made up of practically rightangularly crossing, substantially synthetic yarns and having a width of at least 30 cm, preferably more than 1 m, and a length of at least 3 m, more particularly for geotextile uses, such as for bearing one or more layers of sand, gravel, stones, clay, loam, asphalt, mortar or like bulk or other material, the fabric having a tensile strength in one or more directions of at least 50 kN/m. The yarns of the fabric are entirely or partly in the form of tapes or threads, the material of each of the tapes or threads chiefly being formed of a matrix of polypropylene incorporating a polyester, preferably polyethylene terephthalate. The matrix is used in an amount of 75 to 85 per cent by weight, based on the total weight of the tapes or threads, and the polyester is used in an amount of 25 to 15% by weight, based on the total weight of the tapes or threads.
Inventors
- 👤 Gustaaf Maria Wilhelmus Van De Pol
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 11:08
CPC Classifications
D; D03; D03D; D03D1/00; D03D15/00; D03D15/40; D03D15/44; D03D15/46; D03D15/20; D03D15/283; D03D15/41; D03D15/50; D03D15/573; D04; D04B; D04B1/00; D04B1/14; D04B1/16; E; E01; E01C; E01C3/00; E01C3/06; E02; E02D; E02D17/00; E02D17/18; D10; D10B; D10B2321/00; D10B2321/02; D10B2321/022; D10B2331/00; D10B2331/04; D10B2403/00; D10B2403/02; D10B2403/024; D10B2403/0241; D10B2403/02412; D10B2505/00; D10B2505/20; D10B2505/204; Y; Y10; Y10T; Y10T442/00; Y10T442/30; Y10T442/3033
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
191 words
A supporting fabric, such as a woven fabric, a knitted fabric, a web or a deposition made up of crossing, substantially synthetic yarns and having a width of at least 30 cm, preferably more than 1 m, and a length of at least 3 m, more particularly for stationary geotextile uses, such as for bearing one or more layers of sand, gravel, stones, clay, loam, asphalt, mortar or like bulk or other material, to a height of at least 5-10 mm, the fabric having a tensile strength in one or more directions of at least 50 kN/m, characterized in that the yarns of the fabric are entirely or partly in the form of tapes or threads, the material of each of the tapes or threads chiefly being formed of a matrix of polypropylene incorporating a polyester, preferably polyethylene terephthalate, and in that the matrix is used in an amount of 75 to 85 per cent by weight, based on the total weight of the tapes or threads, and the polyester is used in an amount of 25 to 15% by weight, based on the total weight of the tapes or threads.
Claim 2
Dependent Claim
191 words
A supporting fabric, such as a woven fabric, a knitted fabric, a web or a deposition made up of crossing, substantially synthetic yarns and having a width of at least 30 cm, preferably more than 1 m, and a length of at least 3 m, more particularly for stationary geotextile uses, such as for bearing one or more layers of sand, gravel, stones, clay, loam, asphalt, mortar or like bulk or other material, to a height of at least 5-10 mm, the fabric having a tensile strength in one or more directions of at least 50 kN/m, characterized in that the yarns of the fabric are entirely or partly in the form of tapes or threads, the material of each of the tapes or threads chiefly being formed of a matrix of polypropylene incorporating a polyester, preferably polyethylene terephthalate, and in that the matrix is used in an amount of 75 to 85 per cent by weight, based on the total weight of the tapes or threads, and the polyester is used in an amount of 25 to 15% by weight, based on the total weight of the tapes or threads.
Claim 3
Dependent Claim
51 words
A fabric according to claim 1, characterized in that the polypropylene matrix is used in an amount of about 80% by weight, based on the total weight of the tapes or threads and the polyester in an amount of about 20% by weight, based on the total weight of the tapes.
Claim 4
Dependent Claim
26 words
A fabric according to claim 1, characterized in that the polyester is contained in the polypropylene matrix in the form of a large number of fibrils.
Claim 5
Dependent Claim
34 words
A fabric according to claim 1, characterized in that in one or more directions, particularly in warp direction, the fabric has a tensile strength of 50 to 1000 kN/m, preferably 75 to 600 kN/m.
Claim 6
Dependent Claim
34 words
A fabric according to claim 1, characterized in that in one or more directions, particularly in warp direction, the fabric has an elongation at rupture of 5 to 20%, preferably about 8 to 20%.
Claim 7
Dependent Claim
48 words
A supporting fabric according to claim 1 of the type with warp and weft yarns, the tensile strength of the fabric in weft direction being at least 15 kN/m, characterized in that the fabric has a mass of 150 to 2500 g/m², preferably about 200 to 1000 g/m².
Claim 8
Dependent Claim
52 words
A fabric according to claim 1, characterized in that use is made of yarns, more particularly warp yarns, which are formed by a single tape which in the untwisted state has a thickness of about 60 to 100 µm and a width of at least 0,5 mm, preferably 1 to 150 mm.
Claim 9
Dependent Claim
25 words
A fabric according to claim 1, characterized in that yarns, particularly warp yarns are used having a linear density of about dtex 1500 to 75000.
Claim 10
Dependent Claim
96 words
A fabric according to claim 1, of the type with warp and weft yarns, characterized in that the fabric is so constructed that the yarns extending in the warp direction of the fabric are formed by straight warp yarns and binder warp yarns, the straight warp yarns each having a higher strength than the binder warp yarns, the construction being such that when the fabric is subjected to a tensile load in the warp direction the straight warp yarns bear a higher proportion of the tensile load, preferably at least 80%, than the binder warp yarns.
Claim 11
Dependent Claim
40 words
A fabric according to claim 9, characterized in that the linear density of each of the straight warp yarns is at least five times, preferably ten to forty times as high as the linear density of the binder warp yarns.
Claim 12
Dependent Claim
79 words
A process for constructing a road embankment, a dike, a dam, a concrete structure or some other body formed of bulk material, such as sand, gravel, stones, clay, loam, asphalt or cement mortar, and/or for stabilizing soil, a supporting fabric being laid on a subsoil and subsequently one or more layers of bulk material being placed on the supporting fabric, characterized in that use is made of the supporting fabric according to one or more of the claims 1-10.
References Cited (Backward Citations)
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