Light and/or High Compactness fabric, in Particular for Parachutes
Abstract
The invention relates to a fabric made of continuous warp yarns and weft yarns, comprising 30 to 63 warp yarns and 30 to 63 weft yarns per centimetre, and in which the yarns are spread so as to lie in a same plane, the yarns having a dtex of between 11 and 78 dtex and a DPF (decitex per filament) defined in the following manner on the basis of the number of warp and weft yarns: (I) the fabric has a weight of between 27 and 40 g/m 2 and a perviousness to air lower than or equal to 120 l/m 2 /s at 127 Pa, as measured according to the ASTM-D-737 standard (1 hour) on a measuring surface of 20 cm 2 . AA BB Nombre de Nombre de fils de DPF (dtex) fils de chaîne trame 1.0 ≦ DPF ≦ 1.35 30-49 30-49 1.35 < DPF ≦ 2.3 35-63 35-63 AA Number of warp yarns BB Number of weft yarn.
Claims
exact text as granted — not AI-modified1 . A fabric for a parachute canopy, a paragliding canopy or a sailing boat sail, formed with continuous warp yarns and weft yarns, comprising from 30 to 63 warp yarns and from 30 to 63 weft yarns, per cm, and wherein the filaments are spread out so as to appear in the same plane, the yarns have a dtex comprised between 11 and 78 dtex and a DPF (dtex per filament) is defined in the following way, depending on the number of warp and weft yarns:
Number of warp
Number of weft
DPF (dtex)
yarns
yarns
1.0 ≦ DPF ≦ 1.35
30-49
30-49
1.35 < DPF ≦ 2.3
35-63
35-63
the fabric has a weight comprised between 27 and 40 g/m 2 and an air perviousness of less than or equal to 120 L/m 2 /s under 127 Pa, as measured as according to the ASTM D-737 standard (1 hour) on a measuring surface area of 20 cm 2 .
2 . The fabric according to claim 1 , characterized by the following characteristics:
DPF (dtex)
Number of warp yarns
Number of weft yarns
1.0 ≦ DPF ≦ 1.35
37-47
37-47
1.35 < DPF ≦ 2.3
40-59
40-59
3 . The fabric according to claim 1 , characterized by the following characteristics:
Number of yarns (for the warp and for the
weft)
DPF (dtex)
35-49
1.0 ≦ DPF ≦ 1.35
30-45
1.0 ≦ DPF ≦ 1.35
50-63
1.35 < DPF ≦ 2.3
35-47
1.35 < DPF ≦ 2.3
4 . The fabric according to claim 1 , characterized in that the fabric has a compactness of the fold of less than or equal to 0.65 mm, in particular less than or equal to 0.58 mm, preferably less than or equal to 0.52 mm.
5 . The fabric according to claim 1 , characterized in that the fabric has a compactness at the centre of less than or equal to 0.55 mm, in particular less than 0.52 mm, preferably less than or equal to 0.45 mm.
6 . The fabric according to claim 1 , characterized in that the fabric has a weight comprised between 27 and 35 g/m 2 .
7 . The fabric according to claim 1 , characterized in that the fabric has a thickness comprised between 36 and 45 μm.
8 . The fabric according to claim 1 , characterized in that the fabric has an air perviousness of less than or equal to 15 L/m 2 /s under 127 Pa, as measured according to the ASTM-D-737 standard (1 hour) on a measuring surface area of 20 cm 2 .
9 . The fabric according to claim 1 , characterized in that the fabric is coated.
10 . The fabric according to claim 9 , characterized by a number of yarns (for the warp and for the weft) comprised between 37 and 47 and a DPF such that 1.0≦DPF≦1.35.
11 . The fabric according to claim 9 , characterized in that the fabric has a compactness of the fold of less than 0.85 mm, in particular less than 0.75 mm, preferably less than 0.65 mm.
12 . The fabric according to claim 9 , characterized in that the fabric has a compaction at the centre of less than or equal to 0.75 mm, preferably less than or equal to 0.55 mm.
13 . The fabric according to claim 9 , characterized in that the coated fabric has a weight comprised between 30 and 50, preferably between 30 and 40 g/m 2 .
14 . The fabric according to claim 9 , characterized in that the coated fabric has a thickness comprised between 60 and 85 μm.
15 . The fabric according to claim 9 , characterized in that the coated fabric has an air perviousness of less than or equal to 2 L/m 2 /s under 1,000 Pa, as measured according to the ASTM-D-737 standard (1 hour) on a measuring surface area of 20 cm 2 .
16 . The fabric according to claim 9 , characterized in that the fabric is coated with a silicone material.
17 . The fabric according to claim 1 , characterized in that the diameter of the filaments is comprised between 10 and 22 μm, preferably between 10 and 19.5 μm.
18 . The fabric according to claim 1 , characterized in that the yarns are flattened by calendering.
19 . The fabric according to claim 1 , characterized in that the yarns have a tenacity greater than or equal to 5.8 cN/dtex.
20 . The fabric according to claim 1 , characterized in that it has a tear resistance greater than or equal to 1.5 daN according to the ISO 4674 test standard, or greater than or equal to 1.8 daN according to the ISO 13937-2 standard.
21 . The fabric according to claim 1 , characterized in that an anti-sliding agent is applied on at least one portion of the surface of the yarns or of the fabric.
22 . A parachute canopy, a paragliding canopy or a sailing boat sail, comprising or formed with a fabric according to claim 1 .
23 . A method for making a fabric according to claim 1 , wherein after weaving the warp and weft yarns, the filaments are spread out so that they appear substantially in the same plane.Join the waitlist — get patent alerts
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