Normal temperature extra soft adhesive for externally repairing side edge scratches of retreaded tire and repairing process

Abstract

The invention discloses a normal temperature extra soft adhesive for externally repairing side edge scratches of a retreaded tire, comprising the following raw materials in parts by weight: 80 parts of natural standard rubber, 20 parts of butadiene rubber 9000, 100 parts of CaCO3, 10 parts of carbon black N754, 5 parts of 99.5-percent zinc oxide, 3 parts of stearic acid, 1 part of anti-aging agent 4010, 1 part of anti-aging agent RD, 1.5 parts of anti-aging agent DFC, 60 parts of engine oil, 3 parts of sulphur, 1.5 parts of accelerating agent M and 0.2 part of accelerating agent TMTD. The invention also discloses a repairing process of side edge scratches of a retreaded tire. The normal temperature extra soft adhesive improves the soft characteristics of adhesive under normal temperature,and the plasticity reaches 0.90-0.95 and is one time higher than that of the traditional bonding adhesive. In the process, the traditional ponderous heating and extruding tools are not used and simple repairing tools are used, thus a user can do as own wishes during operation. The repaired part of the tire has neat appearance, and the normal temperature extra soft adhesive has high production efficiency and saves energy.

Description

technical field [0001] The invention relates to a method for externally repairing sidewall damage of retreaded tires, in particular to a normal-temperature special soft glue and a repairing process for externally repairing sidewall damage of retreaded tires. Background technique [0002] The damage caused by the rubbing of the tire sidewall by hard objects must be repaired in time. In the existing tire sidewall damage repairing process of retreaded tires, the sidewall damage repair glue directly adopts adhesive glue, and after the adhesive glue is heated by a hand-held extrusion tool, the adhesive glue is extruded and pasted on the Sidewall injuries. The specific process is as follows: First, coat the polished surface of the sidewall with glue and let it dry, then install it on the equipment (the rotating frame of the tire retreading line), and apply the extruded hot glue evenly on the tire. Side wounds, until the pits at the damage are filled with glue, and then ready to ...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned process mainly has the following deficiencies: 1. The repairing operation is inconvenient, because it must be operated under the hot state of the glue. Once the glue is extruded, it is not repaired in place or smoothed in time, and the glue is hard after cooling and it is difficult to perfect the repairing operation; 2. 1. It consumes a lot of glue, because it is difficult to accurately grasp the amount of glue to be added, and the appearance quality requires that there should be no lack of glue at the repaired part, so the operation is often rather more than less, resulting in waste and high cost; 3. The production efficiency is low and the labor intensity is relatively high. Large, because the glue repair tool is heavy, and the tool is connected with compressed air pipes, cables and rubber supply strips, which is heavy to operate and not easy to move. The operating position and quantity are limited, which becomes the bottleneck of the flow of products on the assembly line; 4. Affect tires The surface is beautiful, but it is difficult to accurately control the amount of glue replenishment. After the tire is vulcanized, the excess glue will overflow the repaired area, forming overflowing glue flashes and affecting the appearance; The vulcanized tire retreading process adopts the moldless vulcanization method of the envelope, that is, the soft rubber envelope is used instead of the mold, and the appearance of the vulcanized finished product is almost the same as that before vulcanization

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