The goal of this project is to develop a continuous process for waste tire rubber devulcanization in an extruder and reuse into high value-added rubber products. The waste tire rubber was mechanically broken down to lower molecular weight by high shearing forces generated from screw rotation in a twin-screw extruder. Additionally, devulcanizing agent design, molecular simulation, computational fluid dynamics simulation (CFD), and twin-screw design software were used to accelerate and optimize every details in the developing continuous devulcanization process. The checkpoints of the reclaimed waste tyre rubber were exhibited by the accredited standard methods, as followings: (1)Sol component content is 39.3%；(2) Mooney Viscosity ML (1+4)100°C is 29.9；(3)Tensile strength is 136Kg/cm2, and (4)Elongation at break is 416 % which attain to the project objective. The reclaimed waste tyre rubber were formulated with virgin rubber (10/90, 20/80, 30/70, 40/60, 50/50 wt% ratio) and re-cured successfully. The checkpoints of the cured blends were exhibited by the accredited standard methods, as followings: (1)Hardness (Shore A) is 60~61；(2)Ultimate Tensile Strength is 13.4~17.8 MPa；(3)Tear strength is 22.8~31.9 KN/m, and (5)Elongation at break is 418.3~623.5 % which attain to the project objective.

waste tire, extruder, reclaimed rubber