Shoe component and manufacturing method thereof

A foaming shoe component, comprising:

• 90 to 99% by weight of a thermoplastic material;
• and
• 1 to 10% by weight of a mixed material, which is mixed with the thermoplastic material;
• wherein the molecular weight of the thermoplastic material is in a range of 30,000 to 100,000;
• wherein the foaming shoe component has a resilience which is in a range of 50% to 80%, a compression set which is less than 50%, and a tear strength which is in a range of 10 to 30 kg/cm;
• wherein the foaming shoe component is made by a process to provide a ratio of a cavity volume of a mold to a volume of the foaming shoe component in a range of 1:0.98 to 1:1.02;
• wherein the process comprises:
• uniformly blending the thermoplastic material, the mixed material, and a supercritical fluid with each other to obtain a thermoplastic foaming fluid;
• injecting the thermoplastic foaming fluid into the mold, wherein a predetermined gas pressure in the mold is in a range of 5 to 50 bar;
• after the predetermined gas pressure of the mold is released, gasifying the supercritical fluid in the thermoplastic foaming fluid to form the foaming shoe component, wherein the foaming shoe component has a specific gravity in a range of 0.1 to 0.3 g/cm3.