Expressways have grown rapidly around the world in the past 30 years, and passenger cars have been basically popularized in families. In order to ensure the quality of vehicle maintenance, various countries have formulated relevant regulations. Tires are rigidly needed in vehicle use, and tyre repairs are derived from the tire industry. The market demand is large. The global tire repair market is not strong, and the technical parameters used in tire repair materials are not standardized enough. A few routine tire repair marketing borrows Machine-drilling has brought unfavorable factors to safe driving. The technical parameters and scope of use of tire repair materials should be strengthened and the technical knowledge of tire repair should be improved and upgraded.
Research and analysis on the current situation of the global passenger car tire repair industry. During the field investigation, we have received strong support from relevant scientific research institutions, domestic and foreign passenger car tire production and tire repair industry front-line workers and end consumers. Thank you again.
Introduction to tire structure and repair
Passenger car tires are mainly composed of steel wire, cord, rubber, etc. The steel wire and cord mainly play the role of load-bearing, while the rubber mainly plays the role of sealing, damping, bending force, bending transfer force, flexibility, friction and so on.
The tire is punctured and the air leak is caused by the damage of the inner wall sealing layer. What kind of material is used to repair the tire? It is necessary to measure the outer and inner diameter data of the tire wound channel, measure the incline of the wound, calculate the difference between the inner and outer diameter of the wound, and determine the type and range of the material used according to the tire wound site and the measured data. Tire repairs cannot be made with materials beyond the scope, and expired tires cannot be repaired. No air leakage after repair does not mean safety.
The disadvantages of using the tire repair patch over the range
If the tire patch is used too large, the repair operation will increase the damage to the inner wall of the tire, which will change the density and flexibility around the wound and the overall balance of the tire. If the patch is used too much, it will change the bending force and winding transfer around the patch. Compared with the use of a suitable film, the probability of air leakage is increased. Excessive use of tire repair film, especially in half air, or continuous high-speed driving with full load, will inevitably leak air.
The disadvantages of overuse of mushroom nails
The tire frame structure is mainly composed of steel cords. The steel wires and cords inside the tire are within 5mm of the inner side of the crown, and the steel wires and cords are arranged in a meridian pattern of 0.4~0.75mm. Regardless of the size of the wound pierced by a sharp or blunt tool, the shape of the mushroom nail is opposite. When repairing the tire, go through the wound channel from the inside of the tire. The closed wound is repaired with mushroom nails. The closed wound needs to be drilled into an open hole with an electric drill. Otherwise, the steel cord will not pass through. There is a risk of puncture due to breakage. It is not recommended to use mushroom nails beyond the scope. The wound of the tire is large outside and small inside. It does not expand and expand and insert it (expansion destroys the steel cord) to change the density and roundness around the wound. Over time, the steel cord will break and the tire will deform and tremble. Large outside and small inside (difference) do not expand, use mushroom nails according to the inside diameter, the outside is large, and the outer passageway cannot be blocked.
The status quo of the tire repair market
Driven by interests, a very small number of tire repair material manufacturers and some professional tire repair companies combined with the endorsement of suit experts, intentionally or unintentionally exaggerated the scope and effect of thick patch, mushroom nails, and low-temperature vulcanized tire repair materials, misleading the concept and use of tire repair The principle of raw materials has caused most consumers to mistakenly believe that “the larger the tire repair material, the more expensive the safer” the mushroom nail tire repair is “the safest”. This misleading trend has the tendency of good and bad money to drive out good money, and even “xiaobai” After tying the tire, regardless of the suitability of the tire wound, it will actively request that the tire be repaired with mushroom nails, large thick film, and low-temperature vulcanization.
The large stock and over-range use of large and thick tyre repair film, mushroom nails, and low-temperature vulcanization (hot repair) will bring social tire safety hazards, and users and car owners generally do not understand the importance of using over-range tyre repair materials to tire safety. Over-range use will increase the probability of high-speed puncture and have a certain degree of concealment and delay. It is not easy for car owners to detect the cause of unexplained puncture. The risk of puncture will not appear immediately after repair. . Therefore, it is extremely urgent to solve the problem of using materials beyond the range to improve the safety factor after tire repair.
