WO2005051639A1 - ランフラットタイヤ用支持体およびその製造方法 - Google Patents
ランフラットタイヤ用支持体およびその製造方法 Download PDFInfo
- Publication number
- WO2005051639A1 WO2005051639A1 PCT/JP2004/017485 JP2004017485W WO2005051639A1 WO 2005051639 A1 WO2005051639 A1 WO 2005051639A1 JP 2004017485 W JP2004017485 W JP 2004017485W WO 2005051639 A1 WO2005051639 A1 WO 2005051639A1
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- WIPO (PCT)
- Prior art keywords
- support
- run
- adhesive
- flat tire
- treatment
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
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- 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
- B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
- B60C17/04—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency
- B60C17/06—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
- B29D2030/0683—Additional internal supports to be positioned inside the tyre, as emergency supports for run-flat tyres
Definitions
- the present invention relates to a support for an annular run-flat tire disposed inside a tire and a method for manufacturing the same, so that when punctured, the tire can travel a considerable distance in that state.
- the run-flat running can be pneumatic tire, namely, even if the tire pressure to puncture becomes OKG / cm 2, a tire (hereinafter capable of running safely some distance, referred to as Ranfura' Totaiya ) Is known as a core type in which an annular core (support) made of metal or synthetic resin is attached to a rim portion in a tire air chamber (for example, see Patent Documents 1 and 2). ).
- the core type a rotary core type incorporated in a rim and a core type having two convex portions in a tire radial cross section (double mountain shape) mounted on the rim are known (for example, And Patent Documents 3-6).
- the rotating core type has a problem in versatility in that a special wheel for fixing the rotating core is required.
- the double-core type is highly versatile because it can be attached to a conventional rim.
- the annular support is required only during run-flat traveling, it is desirable that the annular support be made of a light material.
- the support for the run flat tire has an annular leg bonded to both ends of the support, and is attached to the rim via the leg. At this time, the both ends of the support In order to improve the adhesive property, a surface roughening treatment by shot blasting was sometimes performed on the bonded portion of the support portion.
- a support as a composite of a metal support and rubber legs supports the load.
- the composite is repeatedly distorted while rotating, and generates heat due to the distortion.
- Run-flat running guarantees that the vehicle can run a certain distance without any problems (for example, it can run at 50 km or more at 80 km / h). Depending on temperature, it may exceed 150 ° C.
- the support bonded by applying the conventional two-component coating type vulcanizing adhesive will peel off at the interface between the top coating adhesive of the support and the rubber leg and the rubber composition! / ,
- Patent Document 4 discloses a core to which a lube lubrication system for suppressing damage to the rear surface of a tread portion is added. Specifically disclosed.
- Patent Document 1 JP-A-2002-377519
- Patent Document 2 JP 2001-519279 A
- Patent Document 3 JP-A-10-297226
- Patent Document 4 JP 2001-163020 A
- Patent Document 5 JP-A-2003-48410
- Patent Document 6 U.S. Pat.No. 6,463,974 B1
- the present invention provides a method for producing a run-flat tire support excellent in durability while maintaining high adhesion between the support portion and the leg, and the run-flat tire support. Means for solving the problem
- a first aspect of the present invention is a method of manufacturing a support for an annular run-flat tire having a support portion and a leg portion and capable of supporting a load during run-flat running, wherein the support portion and the leg portion are provided. Supplying the leg portion, performing a surface treatment including a chemical conversion treatment on a bonding region with the leg portion at a radially inner end portion of the support portion, and bonding the radially inner end portion and the leg portion. And a method for producing a support for a run flat tire.
- the surface of the support may be made of a metal material.
- a region other than the adhesion region of the support portion may be subjected to a protection treatment, or the surface treatment and the protection treatment.
- the protection treatment may be a protection coating treatment for applying a protection coating or a plating treatment.
- the bonding between the radially inner end of the support and the leg may be vulcanization bonding.
- the protection process may be performed with the masking member put on the leg portion and the support portion exposed.
- a second aspect of the present invention is a method for producing an annular run-flat tire support having a support portion and a leg portion and capable of supporting a load during run-flat running. Supplying the leg, applying an adhesive to a radially inner end of the support portion and an adhesive region with the leg, and applying the unvulcanized leg to the adhesive via the adhesive.
- This is a process for applying a topcoat adhesive after the application, and is a method for producing a run-flat tire support, wherein the topcoat adhesive is an adhesive containing a maleimide derivative.
- the applied film thickness of the top coat adhesive may be 2 m or more.
- the method may further include a step of subjecting the support portion to a chemical conversion treatment with a zinc phosphate-based treating agent.
- the undercoat adhesive may be an adhesive containing no halogen.
- a third aspect of the present invention is an annular run-flat tire support having a support portion and a leg portion and capable of supporting a load during run-flat running, wherein the support portion and the leg portion are provided.
- a fourth aspect of the present invention is an annular run-flat tire support capable of supporting a load during run-flat running, comprising a support portion and a leg portion, wherein the support portion is provided with a cover.
- a coating layer comprising a resin-containing resin layer and a resin-containing paint, wherein a part or all of the surface of the support portion is covered with the coating layer.
- a run-flat tire support which is one of a sulfuric acid adhesive layer containing a rubber component, and a rubber composition layer containing a gen-based rubber as a main component.
- a chemical conversion treatment with an inorganic salt-based chemical conversion treatment agent may be performed in advance on a region of the support portion formed by being covered with the coating layer.
- a fifth aspect of the present invention is an annular run-flat tire support capable of supporting a load during run-flat running, comprising a support portion and a leg portion, wherein the support portion is 780N.
- This is a support for run-flat tires that also has high-grade high-tensile steel.
- the supporting portion is processed by drawing, the carbon content in the 780N grade high tensile steel is a 15 X 10- 2% or less, or may be stretched 20% or more.
- the carbon equivalent of the 780N class high tensile steel may be 0.6 or less.
- the cleanliness of the support portion may be 0.05 or less.
- the support portion has one or more convex portions projecting outward in a radial cross section, and one or more concave portions projecting inward,
- At least one of the protrusions is constituted by a plurality of arcs having different radii of curvature, and among these arcs, the radius of curvature of the arc including the apex of the protrusion is the largest.
- the distance (W) between the convex portion and another convex portion closest to the convex portion, the height (H) of the convex portion, the number of the one or more convex portions (N), and the convex portion And the radius of curvature (R) of the arc including the vertex may be R (mm) ⁇ 12W / HN.
- a support for a run flat tire in which the support portion and the leg portion have high adhesiveness and excellent durability is produced. can do.
- the support for a run flat tire of the present invention has a high adhesiveness between the support portion and the leg portion, and the deterioration of the support portion and the damage of the contact portion between the support portion and the tire inner surface are reduced. , Its durability is excellent.
- FIG. 1 is a partial perspective view of a support portion of a support.
- FIG. 2 is a perspective view of a radial half section of a support portion of the support.
- FIG. 3 is a cross-sectional view of a pneumatic run-flat tire when a rim is mounted.
- FIG. 4 is a cross-sectional view of a pneumatic run-flat tire when a rim is mounted.
- FIG. 5 is a cross-sectional view of a pneumatic run flat tire when a rim is mounted.
- FIG. 6 is a partial cross-sectional view for explaining a shape of a support.
- a support portion of a support for a run flat tire is prepared.
- a metal flat plate is formed into a shape as shown in FIG. 1 by a forming method such as roll forming. sand That is, in the drawing, it has a curved portion 30A, 30B projecting upward and a curved portion 30C projecting downward, and has a shape having flange portions 30F, 30G at both ends.
- the support portion 26 of the support 16 is formed into a ring shape by bending or the like as shown in FIG.
- a material used for the metal flat plate it is preferable to use a material having at least a surface having a metallic material strength.
- strong materials include iron, high tension steel, SUS, and aluminum.
- a surface treatment including a chemical conversion treatment is performed on at least the entire flange portions 30F and 30G.
- the chemical conversion treatment is to form a thin film made of an inorganic salt on the metal surface of the support portion 26 so as to impart corrosion resistance to the metal surface or to improve the adhesion between a leg portion described later and the support portion 26. It is processing for. Therefore, by applying a vigorous chemical conversion treatment, the adhesion between the bonding area of the support portion 26 and the leg is improved, and high adhesion can be maintained even for a long run flat run.
- Such adhesion is caused by the fact that phosphate or the like used in the chemical conversion treatment is crystallized on the metal surface, which is an adhesion region, to form a thin film. That is, it is considered that the formed film has irregularities, and the presence of the irregularities imparts an anchor effect to obtain high adhesive strength. Further, the presence of such a film makes it possible to further improve the anti-corrosion effect (corrosion resistance effect) when the anti-corrosion treatment of the support portion 26 is performed later.
- phosphates such as zinc phosphate, zinc iron phosphate, zinc calcium phosphate, iron phosphate, and manganese phosphate can be used. Practically, the above-mentioned chemical conversion agent is appropriately dissolved in a solvent and used.
- the thickness of the coating formed by the chemical conversion treatment is preferably about 0.1 to 50 m, more preferably about 0.5 to 5 m.
- the surface treatment other than the chemical conversion treatment examples include a surface treatment (coating treatment) for applying chromate chromate, organic acid titanate, or the like. Also in this case, the treatment agent is appropriately It is used by dissolving in
- the thickness of the coating formed by the coating treatment is preferably about 0.1 to 50 m, more preferably about 0.5 to 5 m.
- the protection treatment is performed at least on the portion where the chemical conversion treatment is performed.
- the anti-rust treatment is also applied to the support portion other than the bonding area.
- the strong parts are exposed metal, so they are in a corrosive environment. Corrosion resistance can be imparted by applying anti-corrosion treatment.
- Examples of the water-proofing treatment include a water-proofing coating treatment for applying a water-proofing paint or a plating treatment.
- the thickness of the coating film formed when performing the protective coating is about 0.1 to 500 m. 0 .: If less than m, sufficient protection may not be obtained, and if more than 500 / z m, cracks may occur on the surface.
- a protective coating used for general metals can be applied.
- Specific examples include acrylic resin paints, polyester resin paints, polyurethane resin paints, epoxy resin paints, fluorine resin paints, and silicon paints.
- Examples of the plating treatment described above include zinc plating, chrome plating, and electrodeposition coating.
- the preferred plating thickness is the same as in the case of the waterproof coating.
- the chemical conversion treatment and the protection treatment are carried out by immersion in these treatment liquids; by spraying a surface treatment agent or a protection agent (a protection paint) using a spray.
- a surface treatment agent or a protection agent a protection paint
- the protection process it is preferable to perform the protection process in a state where the masking member is put on the legs and the support portions are exposed. At this time, it is preferable to carry out spray coating while rotating the support. By covering with a masking member, it is possible to selectively perform a prevention process on a desired range.
- the bonding portion of the support portion is used.
- An adhesive is applied to the legs and vulcanized to the legs (adhesion treatment).
- a support having leg portions formed at both ends is produced.
- the legs After performing the surface treatment, the legs may be vulcanized and bonded, and then the support may be subjected to a heat-proof treatment.
- the adhesive used for the vulcanization bonding it is preferable to use a vulcanization type adhesive for rubber of synthetic resin type, phenolic resin type, silicone type or the like.
- the temperature is preferably about 120 to 200 ° C.
- the time is preferably about 5 to 60 minutes.
- NR natural rubber
- IR isoprene rubber
- BR butadiene rubber
- SBR styrene butadiene rubber
- IIR butyl rubber
- a primer treatment before applying the top coat adhesive.
- a primer such as a synthetic rubber, epoxy, or phenol-based resin, which contains at least one kind of polyisocyanate, epoxy resin, phenol resin, synthetic rubber, or the like.
- Such a treatment is performed when a so-called two-component adhesive is used. That is, a primer layer formed by the primer treatment and a cover coat layer are formed on the primer layer in the bonded portion.
- the step of supplying a support portion and a leg portion includes the steps of: supplying an adhesive to a bonding region with the leg portion at a radially inner end of the support portion; And applying a vulcanization bonding process to the unvulcanized leg via an adhesive, thereby bonding the leg to the bonding region.
- the coating process of the adhesive in the bonding step is a process of applying an undercoat adhesive to a bonding area and then applying an overcoat adhesive, and using an adhesive containing a maleimide derivative in the overcoat adhesive.
- the bonding distance was relatively stable even when the heat generation temperature was high, so that the traveling distance until peeling was long. .
- the applied film thickness of the top coat adhesive is preferably about 2 ⁇ m or more. By setting the thickness to about 2 ⁇ m or more, stable adhesive strength can be more reliably exhibited.
- the coating thickness is more preferably about 5 m or more.
- At least the support portion is subjected to a chemical conversion treatment with a zinc phosphate-based treating agent.
- the surface treatment method on the support side also affects the run flat durability, and the chemical treatment with a zinc phosphate treatment agent can improve the durability more than the one without any surface treatment. . Further, it is preferable to use a blast treatment for improving durability more.
- the undercoat adhesive is preferably an adhesive containing no halogen.
- the undercoat adhesive good adhesive strength can be maintained for a long period of time by using an adhesive containing no halogen. Further, even when combined with a top coat adhesive containing a maleimide derivative, the use of an adhesive containing no halogen in the under coat adhesive can further improve the adhesion durability.
- the thickness of the coating is preferably about 11 to 5 ⁇ m, more preferably about 2 to 5 ⁇ m.
- the vulcanization bonding treatment is performed under a high load and a high temperature environment where there is no problem of delamination at the interface between the rubber and the overcoat adhesive even under a high load and a high temperature environment. It is suitable for producing a support for run flat.
- the support produced by the first and second production methods of the present invention can be applied to various pneumatic run-flat tires.
- Fig. 3 shows an example of a pneumatic runflat tire to which the support can be applied.
- the (pneumatic) run-flat tire 10 is a rim 12 on which a pneumatic tire 14 and a support 16 are assembled. Rim 12 fits pneumatic tire 14 size This is a standard rim.
- the pneumatic tire 14 includes a pair of bead portions 18, a toroidal carcass 20 extending across the two bead portions 18, and a plurality of carcasses 20 located in a crown portion of the carcass 20 (in the present embodiment,
- the belt layer 22 includes two belt layers 22 and a tread portion 24 formed on the belt layer 22.
- the support 16 disposed inside the pneumatic tire 14 has a cross section shown in FIG. 3 and is formed in a ring shape.
- the support 16 is formed by vulcanization at both ends of the support 26. And rubber feet 28.
- the support 16 manufactured as described above is disposed inside the pneumatic tire 14, and the leg portion 28 of the support 16 is provided together with the pneumatic tire 14. Is manufactured by assembling the rim 12.
- the load is the maximum load (maximum load capacity) of a single wheel in the applicable size described in the following standard
- the internal pressure is the maximum load of a single wheel (maximum load ( The rim is the standard rim (or “Approved Rim”, “Recommended Rim”) in the applicable size specified in the following standards.
- the standards are determined by the industry standards that are in effect in the area where the tire is manufactured or used. For example, in the United States, the Year Book of the Tire and Rim Association Inc., and in Europe, "Standards Manual (?) Of The European Tire and Rim Technical Organization.
- the support for a run flat tire described above includes the first or second embodiment of the present invention described above. If the support portion and the leg portion are joined by applying the above manufacturing method, a support body as described below can be obtained.
- the first support of the present invention has a support portion and a leg portion, has an annular structure capable of supporting a load during run-flat running, and a part or all of the surface of the support portion is covered with a coating layer. It is formed.
- the coating layer is a resin layer containing a resin, a coating layer made of a paint containing a resin, a vulcanized adhesive layer containing a rubber component, and a rubber composition layer containing a gen-based rubber as a main component. , Either.
- Corrosion is caused by the presence of moisture, oxygen (oxidizing agent) and metal, causing local battery action. Therefore, it is necessary to prevent any of the above substances from coming into contact with the coating layer.
- the level of protection differs because there is a difference in the isolation effect (water permeability, oxygen permeability, oxidizing substance permeability). Therefore, the coating layer is a layer as described in this specification.
- the resin layer containing the resin phenol resin, alkyd resin, epoxy resin and the like can be used.
- the coating layer made of a paint containing a resin, a composition or the like containing the above resin and a paint such as a fireproof paint can be used.
- a layer composed of a vulcanized adhesive layer containing natural rubber, isoprene rubber, polybutadiene rubber, polystyrene butadiene rubber, or the like can be used as the vulcanized adhesive layer containing a rubber component.
- the layer of the rubber thread mainly composed of a gen-based rubber is not particularly limited as long as it is composed mainly of a gen-based rubber. Can be used.
- each of the above layers preferably has a thickness of about 115 mm, more preferably about 214 mm.
- the covering layer 100 may be provided on the entire surface of the support portion on the back surface side of the tread portion. As shown in FIG. 5, a region (convex portion) that comes into contact with the back surface of the tread portion during run flat running May be selectively provided.
- a chemical conversion treatment with an inorganic salt-based chemical conversion treatment agent be performed in advance on at least a region of the support portion where the coating layer is formed.
- the conversion coating (inorganic salt) has a greening effect, so the effect of coating increases. That is, there is an effect that the local battery action occurs.
- a chemical conversion agent as described above can be used, and among them, zinc phosphate is preferable.
- a paint composition containing a paint and a pigment in a synthetic resin can be used for the paint treatment. At this time, as the synthetic resin, phenol, alkyd, epoxy, isocyanate-containing compound and other various resins can be used.
- the second support of the present invention is an annular run-flat tire support having a support portion and a leg portion and capable of supporting a load during run-flat running, and the support portion is made of 780N class high-tensile steel.
- the support portion preferably has one or more convex portions projecting outward in a radial cross section and one or more concave portions projecting inward.
- At least one of the convex portions is constituted by a plurality of arcs having different radii of curvature, and among these arcs, the convex portions (Ral and Rbl in FIG. 6) are formed.
- the radius of curvature of the arc containing the vertex of is the largest.
- the convex portion of the support portion is composed of a plurality of circular arcs having different radii of curvature, and among these circular arcs, the radius of curvature of the circular arc including the apex of the convex portion is maximized.
- the contact area between the inner surface of the tread and the support becomes larger than that in the case where the convex curve portion is constituted by an arc having a single radius of curvature.
- the “vertex of the convex portion” refers to a portion where the height H of the support portion from the flange portions 30F and 30G is largest. “The distance (W) between one convex portion and the other convex portion closest to the convex portion” is, as shown in FIG. Means the distance between the vertex (Ral) and the convex part (Rbl).
- the absolute value of the radius of curvature of the arc including the apex of the projection is preferably about 25 mm or more.
- the width of the arc portion including the apex is about 80% of the width (Wa) of the convex portion.
- the “convex width” refers to the distance between the deepest portion (Rcl) of the concave portion and the end of the flange portion 30F, as shown in FIG.
- the width of the arc portion including the vertex is about 40% of the width of the support portion (Wb).
- the “width of the support portion” refers to the distance between the end of the flange 30F and the end of the flange 30G as shown in FIG.
- the supporting portion has a thickness of about 112 mm. Further, it is preferable that the high strength steel sheet has a tensile strength of about 80 kgZmm 2. If tensile strength can be realized, aluminum alloy or FRP may be used.
- the support portion of the support be a closed ring.
- a slit may be provided as described in JP-A-2003-48410.
- the legs are preferably made of a rubber elastic material. Note that a multilayer structure such as US64639474B1 may be applied.
- the cross-sectional shape of the support portion also has two convex portions and one concave portion force located therebetween.
- a configuration having three or more convex portions may be used, such as “convex portion + concave portion + convex portion + recess portion + convex portion”.
- the number of convex portions is 2-4.
- the total width of the support is preferably 150 mm, and the height in the radial direction is preferably 60 mm.
- the cross-sectional shape of the support portion be bilaterally symmetric with respect to the equatorial plane. Note that the vehicle may be left-right asymmetric considering the camber when mounted on the vehicle.
- At least the support portion also has a 780N class high tensile steel strength.
- a low-strength (380 N or less) steel material has been used as the material of the support portion, and the support portion has been obtained by drawing.
- the above steel materials have low strength, so they support the load during run flat Therefore, its thickness is increased, and thus it is heavy.
- Elongation can be improved by reducing the amount of carbon in steel.
- Impurities (manganese oxides, etc.) contained in the material may be a starting point and may be broken during drawing. Therefore, the moldability can be improved by reducing these impurities.
- the drawing method of (1) is performed by using a force such as a spatula drawing, a spinning force purifier, a roll forming, and a hide opening foam.
- the elongation in the main direction exceeds 10%. If the elongation percentage in the main direction exceeds 10%, the elongation of the material is preferably 20% or more, more preferably 22% or more. Below this, the material will crack during processing. Therefore the it is preferable instrument further to below about 15 X 10- 2% of carbon content is preferably about 10 X 10- 2% or less. Above about 15 X 10- 2%, it may not be a stretch to 20% or more.
- C, Si, and Mn in the above carbon equivalent formulas indicate the contents (% by mass) of carbon, silicon, and manganese, respectively.
- the carbon equivalent is preferably about 0.6 or less, more preferably about 0.55 or less. If it exceeds 0.6, the hardness of the welded portion exceeds 400 in HV value, and it becomes a discontinuous point and the elongation is remarkably reduced, which may cause breakage during drawing.
- the steel material of (3) there is an oxidized material of Mn, which serves as a starting point during molding. , The material breaks.
- the amount of this inclusion is defined by JISG055 as a parameter called cleanliness. It is desirable that the cleanliness is about 0.05 or less, more preferably about 0.02 or less. If it exceeds this, the inclusion may be used as a starting point, and the material may be broken during molding.
- the support portion of the support was formed from a flat plate (high-strength steel plate: thickness 1.6 mm) into a shape as shown in FIGS. 1 and 2 by the roll forming method.
- a chemical conversion treatment (surface treatment) using zinc phosphate as a chemical conversion agent was applied to the region where the leg portion including the flange portion is formed and the support portion.
- the coating thickness was 4 ⁇ m.
- a SUS304L (2 Omm thick) flat plate was used in place of the high-strength steel sheet, and a water-proof coating treatment (film thickness: 50 ⁇ m) was performed using a polyester resin paint instead of the acrylic resin paint. Except for the above, a support was produced in the same manner as in Example 1.
- a support was produced in the same manner as in Example 1 except that a surface treatment of applying chromate chromate (having a thickness of 4 ⁇ m) was applied to the chemical conversion treatment.
- a support was produced in the same manner as in Example 1 except that the force was not applied.
- a support was produced in the same manner as in Example 1 except that the chemical conversion treatment and the heat-proof treatment were not performed.
- the supports prepared in Examples 14 and 14 and Comparative Examples 11 and 12 were sprayed with salt water to remove the leg force and the time required for the support portion to peel off, and the support portion to which the legs were not adhered was reduced.
- a saltwater test was performed to evaluate the duration of the run. The results are shown in Table 1 below.
- An adhesive is applied to a bonding region with the leg at the radially inner end of the support portion, and the unvulcanized leg is vulcanized and bonded through the bonding agent, so that the bonding region has a leg.
- the parts were bonded (bonding process).
- the application of the adhesive was performed by sequentially applying an undercoat adhesive and an overcoat adhesive to the above-mentioned bonding area. See Table 2 below for primer and topcoat adhesives. It is as follows. In Examples 5-8 and Comparative Example 5, a chemical conversion treatment was performed with a zinc phosphate-based chemical before the bonding step.
- Example 2 In the same manner as in Example 1, the support and the leg were bonded. Except that the surface layer of the support was as shown in Table 3 below, legs were provided by the method of Example 1 to produce a support. A coating layer (30 ⁇ m) was formed by applying Chemlock 254 (top coat adhesive) to the surface on the back side of the tread portion of the support portion.
- Chemlock 254 top coat adhesive
- Example 14 to 24 and Reference Examples 1 and 2 The coating layer except for using as the following Table 3, to prepare a support in the same manner as in Example 13 ([0076] [Table 3]
- the supports prepared in Examples 13 to 24 and Reference Examples 1 and 2 were subjected to SST durability (evaluation by salt water spray test (SST) (JIS-Z-2371)). Specifically, a salt spray test was conducted for 480 hours in accordance with JIS-Z-2371, and evaluated according to the following criteria. The results are shown in Table 4 below.
- Example 14 Example 14 ⁇ Example 21 ⁇
- Example 15 5 ⁇ 313
- Example 22 ⁇ 700 or more *
- the shape of the support (using 780N class high-tensile steel for the support part) was as shown in Fig. 6, and the settings of Ral-3 and Rbl-3 and Rcl in Fig. 6 were as shown in Table 5 below.
- a support was produced by the method of Example 1.
- test conditions for RF durability are as follows. Attach a test tire incorporating the support described above to a 2500cc rear-wheel drive passenger car, set the tire pressure in the right rear wheel to OkPa, and set the other three tire pressures to 210kPa until failure at 90km / h. I ran. The results are shown as indices with Reference Example 3 being 100. The larger the value, the better the durability.
- a support was produced in the same manner as in Example 25, except that the material and characteristics of the support were as shown in Table 6 below.
- the inclusions in Table 6 refer to manganese oxide.
- the support portion of the support in Example 26 could be formed without breakage in the middle. However, in Reference Examples 416, the breakage occurred at the welded portion and the like, and the force that could not be formed was obtained. I got it.
- the support for a run flat tire has high adhesion between the support portion and the leg portion. Therefore, it can be used as a run-flat tire having excellent durability and a method for manufacturing the same.
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04819401A EP1693181B1 (en) | 2003-11-28 | 2004-11-25 | Support body for run-flat tire and method of manufacturing the same |
US10/581,051 US7531056B2 (en) | 2003-11-28 | 2004-11-25 | Run-flat tire support and manufacturing method for the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003399361A JP2004189214A (ja) | 2002-11-29 | 2003-11-28 | ランフラットタイヤ用支持体の製造方法およびランフラットタイヤ用支持体 |
JP2003-399361 | 2003-11-28 |
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WO2005051639A1 true WO2005051639A1 (ja) | 2005-06-09 |
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PCT/JP2004/017485 WO2005051639A1 (ja) | 2003-11-28 | 2004-11-25 | ランフラットタイヤ用支持体およびその製造方法 |
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US (1) | US7531056B2 (ja) |
EP (1) | EP1693181B1 (ja) |
WO (1) | WO2005051639A1 (ja) |
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JP4384098B2 (ja) * | 2005-09-07 | 2009-12-16 | 横浜ゴム株式会社 | ランフラット支持体と空気入りタイヤとの固定具 |
JP2007314620A (ja) * | 2006-05-24 | 2007-12-06 | Bridgestone Corp | ランフラット支持体用脚部ゴム及びそれを用いた空気入りランフラットタイヤ |
WO2016179010A1 (en) | 2015-05-01 | 2016-11-10 | Lord Corporation | Adhesive for rubber bonding |
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- 2004-11-25 EP EP04819401A patent/EP1693181B1/en not_active Expired - Fee Related
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JP2001163020A (ja) | 1999-11-20 | 2001-06-19 | Continental Ag | 緊急走行支持体を備えた自動車車輪 |
JP2001260235A (ja) | 2000-03-22 | 2001-09-25 | Yokohama Rubber Co Ltd:The | ゴムと金属との接着方法、および、これを用いた構造体 |
JP2001277366A (ja) | 2000-03-29 | 2001-10-09 | Bridgestone Corp | ゴムと金属との加硫接着方法 |
JP2003048410A (ja) | 2001-06-26 | 2003-02-18 | Continental Ag | ランフラット支持体 |
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JP2004314913A (ja) * | 2003-04-21 | 2004-11-11 | Nisshin Steel Co Ltd | ランフラットタイヤの鋼製中子 |
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Also Published As
Publication number | Publication date |
---|---|
EP1693181A4 (en) | 2010-02-10 |
EP1693181B1 (en) | 2012-04-11 |
EP1693181A1 (en) | 2006-08-23 |
US20070102087A1 (en) | 2007-05-10 |
US7531056B2 (en) | 2009-05-12 |
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