A-A-52517 Patch, Repair, For Inner Tubes And Tubeless Tire Liners (Metric)This CID covers hot self-vulcanizing chemical units; chemical vulcanizing patch unit kits, and fluids for repairing robber inner tubes of pneumatic tires and tubeless pneumatic tire liners. The patch units are used in repairing injuries caused by penetrating objects up to and including 3.2 millimeters (mm) in diameter in tubeless tires and injuries up to 19.1 mm in length (tears) in inner tubes.

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A-A-52517

2.2.1.2 Fuel pan. The fuel pan for patch units shall be low carbon steel of such quality to produce patch units which shall conform to the requirements of this CID.

2.2.1.3 Fuel disc. The fuel disc shall have a heat-generating capacity to provide a degree of vulcanization in the patch that will meet the requirements of 2.3.3.

2.2.1.4 Igniting fuse. An igniting fuse or other means of assuring easy lighting shall be integral with the fuel disc or of separate material attached securely to the disc.

2.2.1.5 Filler material.

2.2.1.5.1 Sizes 1 and 2. For size 1 and 2 patch units, there shall be a separate piece of uncured gum material (see 2.2.1.1) approximately 12.7 mm wide by 76.2 mm long and 1.40 mm thick packed with each 25 patch units in their unit container (see 4.).

2.2.1.5.2 Sizes 3 and 4. For size 3 and 4 patch units, there shall be a separate piece of uncured gum material (see 2.2.1.1) having a thickness of 1.40 mm. Its area shall be 645 mm2, inclusive, minimum with the shortest dimension not less than 19.1 mm.

2.2.2 Chemical cure patch kits, type II. Each chemical cure patch kit shall be made up of the components specified in 2.2.2.1 through 2.2.2.3.

2.2.2.1 Chemical cure patch units. Each patch shall be of a cured natural or synthetic rubber compound having a face gum of uncured natural rubber compound or equivalent and shall conform to the sizes specified in table II. The face gum shall exhibit no signs of premature curing at temperatures of 52°C.