Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C19/00—Tyre parts or constructions not otherwise provided for
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
  • B60C11/14—Anti-skid inserts, e.g. vulcanised into the tread band
  • B60C11/18—Anti-skid inserts, e.g. vulcanised into the tread band of strip form, e.g. metallic combs, rubber strips of different wear resistance
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
  • B60C11/0041—Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers
  • B60C11/005—Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers with cap and base layers
  • B60C11/0058—Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers with cap and base layers with different cap rubber layers in the axial direction

Definitions

• the present invention relates to a tire for a passenger vehicle whose exterior surfaces are of different colors, and in particular to a tire having a non-black color on the sidewalls and at least one non-black color on the tread.
• a non-black color mixture can be used as the sole component of the tread, or in combination with a usual black color mixture and / or another color mixture.
• the chemical constitution of the different mixtures rubber should be studied accordingly.
• the tire provided with a radial carcass reinforcement, a crown reinforcement composed of at least two crown plies of inextensible reinforcing elements, preferably metallic. , parallel to each other in each ply and crossed from one ply to the next, making an angle with the circumferential direction which can be between 5 ° and 45 ° and radially outside a tread, is characterized in that that said tread, composed of rubber mixtures of different colors, is axially formed of at least three longitudinal parts, two lateral parts of rubber mix of a first color, radially covering the axial ends of the plies of crown elements of inextensible reinforcement, and at least axially between the two said parts, a part of rubber mix of a second color, different from e the first and not black, each axial end A, visible from the outside of the tire, of the colored part with a second color being distant from the end, situated on the same side relative to the equatorial plane of the tire, of
• the colored part of the tread with a second color can then be either an intermediate part or the two intermediate parts, and the central part can be of the first color or of a color different from the second color of the intermediate parts.
• the radial thickness of the non-black color mixture may have a value between the total thickness of the tread, measured in the equatorial plane, and a value equal to the radial distance separating the tread surface from the surface radially outer wear indicators, placed at the bottom of grooves. Said thickness, for reasons of ease and cost of manufacture, is advantageously equal to the thickness of the tread.
• the improvement in the endurance of the crown reinforcement of such a tire can be supplemented by the presence radially above the crown plies of crossed reinforcement elements of at least one additional ply of reinforcement elements circumferential, ply whose axial width is greater than the width of the widest "crossed" crown ply and said additional ply fulfilling two functions: a hooping function as known, but also a screen function for the migration of additives mixing and in particular anti-aging additives, because of its own thickness and the composition of its calendering.
• the two plies of circumferential reinforcing elements preferably of aliphatic polyamide, the two plies having widths greater than the width of the widest "crossed" crown ply.
• the ply of circumferential elements that is axially the widest will have a width equal to at least 105% of the width of the widest "crossed” ply, this the latter being greater than the width of the contact surface between the ground and the tire tread, inflated to its operating pressure and carrying its nominal load.
• the tread wear as regular as possible transversely despite the presence of at least two mixtures of different composition and color, and to minimize, on the other hand, the risks of takeoff between products on the tread surface, the ends A, visible from the outside of the tire, of the two axial edges of each part of second color will be located in the bottoms of circumferential grooves, axially delimiting said part of second color, said circumferential grooves preferably being longitudinal.
• the colored tire comprises at least one sidewall, at least partially, of non-black color, with an arrangement of rubber mixtures known per se, the color mixture axially on the outside being delimited radially by two flank protrusions projecting axially outward.
• the curvilinear distance separating the radially upper end of the colored flank mixture from the axially outer end of the widest "crossed" crown ply is advantageously at least equal to 30 mm.
• the tire P comprises a carcass reinforcement (1), composed of two plies of radial polyester cables, and anchored by turning (10) to at least one bead wire (2) in each bead.
• the carcass reinforcement (1) is radially surmounted by a crown reinforcement (3) formed by two plies (31) and (32) of the same name, reinforced by inextensible metallic cables crossed from one ply to the next, the radially inner ply (31) having an axial width L31 greater than the axial width L32 of the radially outermost crown ply.
• the width L31 is equal to 123 mm.
• the width L32 is smaller than L31 and equal to 110 mm, while the axial width of the contact surface between the ground and the tire, carrying its nominal load of 380 kg and inflated to its operating pressure of 2.5 bar , is 109 mm.
• each edge of the ply (31) is separated from the outermost carcass ply by a thin rubber profile (4), the edges of the plies (31) and (32) respectively. being separated from each other by a rubbery border layer (5) of thickness equal to 0.5 mm, and the edges of the narrower ply (32) also being covered radially by a border layer (6) of thickness 0.5 mm.
• the set of “crossed” plies and above border gums is covered radially on the outside of two plies (71) and (72) of circumferential reinforcing elements, said elements being textile cables of aliphatic polyamide coated in a calendering mixture suitable for such cables.
• the widths of the plies (71) and (72), equal to one another, are greater than those of the plies (31) and (32), so as to axially cover the edges of the widest "crossed” ply (31) of the top frame.
• the tread (8), covering all the layers, comprises three longitudinal parts: a central part (80) and two lateral parts (81).
• Said parts (81) are composed of a rubber mixture of black color, the constitution of which has been chosen to have wear properties which are substantially identical to the properties of the same name of the mixture of non-black color constituting the central part (80).
• the axial edges of said central part (80) are such that the ends A of these edges, visible on the outside, are located in the bottoms of longitudinal grooves (83) axially delimiting said central part (80).
• Each axial and visible end of the central part A is distant from the end of the narrower "crossed" crown ply (32), situated on the same side with respect to the median plane of the rubber ring of non-black color. , with a quantity LQ equal to 35 mm. or 32% of the axial width L32 of said ply (32).
• the radial thickness h of the central part (80) of non-black color is, in the case described, equal to the thickness H of the tread (8), said thickness being, measured in the plane equatorial, the radial distance between the tread surface and the radially outermost crown ply.
• the tread (8) is connected, on either side of the equatorial plane, to the bead of the tire by a sidewall (9) also comprising a colored part.
• Said part (90), delimited radially by two protrusions (91), is composed, going from the outside to the inside, of a layer of colored rubber mixture (92) (black being excluded), axially adjacent to a layer (93) of rubber mixture more particularly resistant to the phenomenon of initiation to breakage, said layer (93) being itself connected to a layer (94) of conventional flank by a layer (95) of rubber mixture intended for avoid as much as possible the migration of products from the layer (94).

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Tires In General (AREA)
• Compositions Of Macromolecular Compounds (AREA)

Priority Applications (7)

Applications Claiming Priority (4)

Related Child Applications (1)

Publications (2)

Family

ID=26233658

Family Applications (1)

Country Status (10)

Cited By (8)

Families Citing this family (23)

Family Cites Families (13)

• 1997
  • 1997-09-23 FR FR9711919A patent/FR2765525B1/fr not_active Expired - Fee Related
• 1998
  • 1998-06-26 CA CA002294778A patent/CA2294778C/fr not_active Expired - Fee Related
  • 1998-06-26 JP JP2000501039A patent/JP4275309B2/ja not_active Expired - Lifetime
  • 1998-06-26 EP EP98938658A patent/EP0993381B1/fr not_active Expired - Lifetime
  • 1998-06-26 BR BR9810383-0A patent/BR9810383A/pt not_active IP Right Cessation
  • 1998-06-26 WO PCT/EP1998/003918 patent/WO1999001299A2/fr not_active Ceased
  • 1998-06-26 KR KR1019997012532A patent/KR100655095B1/ko not_active Expired - Fee Related
  • 1998-06-26 ES ES98938658T patent/ES2162464T3/es not_active Expired - Lifetime
  • 1998-06-26 DE DE69801996T patent/DE69801996T2/de not_active Expired - Lifetime
• 1999
  • 1999-12-29 US US09/474,231 patent/US6474382B1/en not_active Expired - Lifetime

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