Hybrid cables with layers which can be used to reinforce tyres
원문보기
IPC분류정보
국가/구분
United States(US) Patent
공개
국제특허분류(IPC7판)
B60C-009/20
D02G-003/48
B60C-015/04
D02G-003/12
D07B-001/06
D02G-003/36
D02G-003/04
B60C-009/00
출원번호
US-0020224
(2004-12-27)
공개번호
US-0183808
(2005-08-25)
우선권정보
FR-0007971 (2002-06-26)
발명자
/ 주소
Barguet, Henri
Vo, Le
Pottier, Thibaud
Ducourant, Laurence
출원인 / 주소
Michelin Recherche et Technique S.A.
대리인 / 주소
BURNS DOANE SWECKER &
인용정보
피인용 횟수 :
0인용 특허 :
0
초록▼
The present invention concerns hybrid layered cables some of which can be used to reinforce at least one crown protection ply of tyres for heavy vehicles or earthmovers, and others to reinforce the beads of tyres for light motorised vehicles such as motorcycles. The invention also concerns a composi
The present invention concerns hybrid layered cables some of which can be used to reinforce at least one crown protection ply of tyres for heavy vehicles or earthmovers, and others to reinforce the beads of tyres for light motorised vehicles such as motorcycles. The invention also concerns a composite fabric usable as a crown protection ply of such heavy vehicles or earthmovers, and a bead wire designed to reinforce the said beads and the aforesaid tyres. A hybrid layered cable (C) according to the invention comprises a non-metallic internal layer (Ci) and an unsaturated external layer (Ce) comprising strands (T) each of which is at least in part metallic and which are wound in helix around the said internal layer, the said cable having a relative elongation at break At, measured in tension in accordance with the standard ISO 6892 of 1984, which is higher than 7%. According to another aspect of the invention, the said internal layer is composed of at least one material having a relative elongation at break Ar at 20° C. in excess of 6%.
대표청구항▼
1-37. (canceled) 38. A hybrid layered cable comprising a non-metallic internal layer forming a core and an unsaturated external layer comprising strands, each strand being at least partly metallic and wound helically over the internal layer, wherein said cable, at break under traction, has a relativ
1-37. (canceled) 38. A hybrid layered cable comprising a non-metallic internal layer forming a core and an unsaturated external layer comprising strands, each strand being at least partly metallic and wound helically over the internal layer, wherein said cable, at break under traction, has a relative elongation which is higher than 7%. 39. The cable according to claim 38, wherein said relative elongation is equal to or higher than 10%. 40. The cable according to claim 39, wherein said relative elongation is equal to or higher than 12%. 41. The cable according to claim 38, wherein said internal layer comprises at least one material having, at break under traction, a relative elongation at 20° C. which is higher than 6%. 42. The cable according to claim 38, wherein the relative elongation is measured in accordance with the standard ISO 6892 of 1984. 43. The cable according to claim 38, wherein the number of strands is from 3 to 12, each strand comprising at least three filaments wound helically together at a pitch which is equal to or less than a winding pitch of the strand around the internal layer. 44. The cable according to claim 43, wherein said filaments (fm, fa, fa′) of each strand (T, T′, T1, T2) and said strands (T, T′, T1, T2) are wound in the same twist direction. 45. The cable according to claim 38, wherein the internal layer (Ci) has a diameter di, di′ around which are wound in helix of pitch pi, pi′ the strands (T, T′, T1, T2), being N or N′ in number, wherein each strand (T, T′, T1, T2) comprises: n metallic wires (fm) of diameter de twisted together in helix of pitch pe, or comprising n-1 wires (fm) wound with pitch pe′ around a core wire (fa) for the strand (T, T′, T1, T2), the cable (C, C1, C2) satisfying all the following conditions: (ai) the internal layer (Ci) is composed of a material having a relative elongation at break during traction at 20° C. in excess of 6%; (aii) 0.17?de (in mm)?0.36; (aiii) 1.1(de)?di (in mm)?5(de); (aiv) 3?N?12; (av) 3?n?6; (avi) 5(di)?pe (in mm)?20(di) or 5(di)?pe′ (in mm)?20(di); (avii) pe?pi (in mm)?3(pe) or pe′?pi (in mm)?3(pe′). 46. The cable according to claim 38, wherein the internal layer (Ci) has a diameter di, di ′ around which are wound in helix of pitch pi, pi′ the strands (T, T′, T1, T2), being N or N′ in number, wherein each strand (T, T′, T1, T2) comprises: m metallic wires (fm) of diameter de wound in helix of pitch pe″ around a non-metallic core filament (fa″) of diameter dfa, the cable (C′) satisfying all the following conditions: (bi) the internal layer (Ci) is composed of identical or different materials each having a relative elongation at break during traction at 20° C. in excess of 6%; (bii) 0.17?de′ (in mm)?0.36; (biii) 1.1(de′)?dfa (in mm)?3(de′); (biv) 1.1(dfa+2(de′))?di′?3(dfa+2(de′)) (bv) 3?N′?12; (bvi) 5?m?12; (bvii) 10(di′)?pe″ (in mm)?20(di′); (bviii) pe″?pi′ (in mm)?3(pe″). 47. The cable according to claim 45, wherein said filaments (fm, fa, fa′) of each strand (T, T′, T1, T2) and said strands (T, T′, T1, T2) are wound in the same twist direction. 48. The cable according to claim 46, wherein said filaments (fm, fa, fa′) of each strand (T, T′, T1, T2) and said strands (T, T′, T1, T2) are wound in the same twist direction. 49. The cable according to claim 45, wherein said internal layer forming a core consists of a monofilament. 50. The cable according to claim 38, wherein said internal layer forming a core comprises one or more yarns each comprising a multitude of elementary filaments. 51. The cable according to claim 38, wherein said internal layer forming a core comprises one or more folded yarns each comprised of an assembly of several yarns. 52. The cable according to claim 38, wherein said internal layer comprises an aliphatic polyamide. 53. The cable according to claim 52, wherein said internal layer comprises a 6.6 polyamide. 54. The cable according to claim 38, wherein said internal layer comprise an aliphatic polyester. 55. The cable according to claim 54, wherein said internal layer comprises a polyethylene terephthalate or a polyethylene naphthalate. 56. The cable according to claim 38, wherein said internal layer comprises rayon. 57. The cable (C′) according to claim 46, wherein in the core filamen (fa′) for each strand (T′) consists of a monofilament. 58. The cable (C′) according to claim 57, wherein the core filament (fa′) comprises an aliphatic polyamide. 59. The cable (C′) according to claim 58, wherein said core filament (fa′) comprises a 6.6 polyamide. 60. The cable (C′) according to claim 57, wherein said core filament (fa′) comprises an aliphatic polyester. 61. The cable (C′) according to claim 60, wherein said core filament (fa′) comprises one of a polyethylene terephthalate or a polyethylene naphthalate. 62. The cable (C′) according to claim 57, wherein said core filament (fa′) comprises rayon. 63. The cable according to claim 45, wherein said cable satisfies the following condition: (aviii) 1.5(pe)?pi (in mm)?2(pe) or 1.5(pe′)?pi (in mm)?2(pe′). 64. The cable according to claim 46, wherein said cable satisfies the following condition: (bix) 1.5(pe″)?pi′ (in mm)?2(pe″). 65. The cable according to claim 45, wherein said cable satisfies the following condition: (aix) 4?pe?pi (in mm)?12 or4?pe′?pi (in mm)?12. 66. The cable according to claim 46, wherein said cable satisfies the following condition: (bx) 4?pe″?pi′ (in mm)?12. 67. The cable according to claim 38, wherein said cable comprises N=4 strands (T1) each consisting of n=6 metallic wires (fm, fa), which include a core metallic wire (fa) around which 5 other metallic wires (fm) are wound helically. 68. The cable according to claim 38, wherein said cable comprises N=5 strands T1 each consisting of n=6 metallic wires (fm, fa), which include a core metallic wire (fa) around which 5 other metallic wires (fm) are wound helically. 69. The cable according to claim 38, wherein said cable comprises N=3 strands (T′) each consisting of 7 filaments (fm, fa′), which include a non-metallic core filament (fa′) around which m=6 metallic wires (fm) are wound helically. 70. The cable according to claim 38, wherein said cable comprises N=7 strands (T) each consisting of n=3 metallic wires (fm) twisted together helically. 71. A composite fabric comprising a rubber composition based on at least one diene elastomer which is reinforced by reinforcing elements, wherein said reinforcing elements comprise cables (C′, C1, C2), each cable comprising a non-metallic internal layer forming a core and an unsaturated external layer comprising strands, each strand being at least partly metallic and wound helically over the internal layer, wherein said cable, at break during traction, has a relative elongation which is higher than 7%. 72. The composite fabric according to claim 71, wherein the relative elongation is measured in accordance with the standard ISO 6892 of 1984. 73. The composite fabric according to claim 71, wherein said diene elastomer belongs to the group comprising the polybutadienes, natural rubber, the synthetic polyisoprenes, the copolymers of butadiene-styrene, the copolymers of isoprene-butadiene, the copolymers of isoprene-styrene and the copolymers of butadiene-styrene-isoprene. 74. The composite fabric according to claim 73, wherein said rubber composition is based on natural rubber. 75. The composite fabric according to claim 71, wherein in the cross-linked state, the secant modulus M10 of said rubber composition, measured in accordance with the standard ASTM D 412, is between 5 and 12 MPa. 76. The composite fabric according to claim 71, wherein said fabric comprises said cables (C′, C1, C2) with a cable density between 20 and 40 cables per dm of fabric. 77. The composite fabric according to claim 71, wherein the width ΔL of a bridge of rubber composition between two adjacent cables (C′, C1, C2) is between 0.5 and 1.3 mm. 78. The composite fabric according to claim 38, wherein said width ΔL is between 0.6 and 0.9 mm. 79. A bead wire adapted to reinforce a tire bead of a tire for a light motorized vehicle, wherein said bead wire comprises a cable, said cable comprising a non-metallic internal layer forming a core and an unsaturated, external layer comprising seven strands, each strand wound helically around the internal layer, each strand consisting of three metallic wires twisted helically together, said cable, at break during traction, having a relative elongation which is higher than 7%. 80. The bead wire according to claim 79, wherein the relative elongation is measured in accordance with the standard ISO 6892 of 1984. 81. A tire for a heavy vehicle, comprising a carcass reinforcement anchored in two beads and surmounted radially by a crown reinforcement comprising on the one hand one or more working crown plies, and on the other hand one or more crown protection plies surmounting the said working crown ply or plies, the said crown reinforcement being itself surmounted by a tread connected to the said beads by two sidewalls, wherein at least one of the said crown protection plies comprises a composite fabric comprising a rubber composition based upon at least one diene elastomer which is reinforced by reinforcing elements, wherein said reinforcing elements comprise cables, each cable comprising a non-metallic internal layer forming a core and an unsaturated external layer comprising strands, each strand being at least partly metallic and wound helically over the internal layer, wherein said cable, at break during traction, has a relative elongation which is higher than 7%. 82. The tire according to claim 81, wherein the relative elongation is measured in accordance with the standard ISO 6892 of 1984. 83. A tire for a light motorized vehicle, comprising a carcass reinforcement anchored in two beads, wherein each of the beads is reinforced by a bead wire, wherein said bead wire comprises a cable (C), said cable comprising a non-metallic internal layer forming a core and an unsaturated, external layer comprising seven strands, each strand wound helically around the internal layer, each strand consisting of three metallic wires twisted helically together, said cable, at break during traction, having a relative elongation which is higher than 7%. 84. The tire according to claim 83, wherein the relative elongation is measured in accordance with the standard ISO 6892 of 1984.
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