Reclaimed material for manufacturing shoes and method of producing reclaimed rubber by processing recycled shoe material waste

A method of producing a reclaimed rubber made of recycled shoe material waste, comprising:

• step S1:
• obtaining a scrap rubber during a shoe manufacturing process, which is produced exclusively in the shoe manufacturing process, wherein the scrap rubber is a rubber waste produced during vulcanization of shoe outsole material;
• step S2:
• shredding the scrap rubber to form scrap rubber granules;
• and
• step S3:
• making the scrap rubber granules undergo a devulcanization reaction to form the reclaimed rubber, wherein the scrap rubber granules and N,N′-Thio-bis(phthalimide) undergo a first compounding process at 80-160 degrees Celsius to form an admixture, then the admixture undergoes a second compounding process at 80-160 degrees Celsius to form the reclaimed rubber;
• or wherein the scrap rubber granules and N,N′-Thio-bis(phthalimide) are mixed in a mixing process to form a mixed material, and wherein the mixed material is compounded by a twin-screw extruder running at a rotational speed in a range of 150 rpm to 350 rpm at 60-190 degrees Celsius to form the reclaimed rubber;
• and
• wherein the reclaimed rubber is subject to a Soxhlet extractor with toluene as solvent for 24 hours to obtain a gel content of the reclaimed rubber according to ASTM D2765, and the gel content of the reclaimed rubber is in a range of 55% to 75%.