Manufacturing method of recycling leather sheet using fiber of leather

A method of preparing recycling leather sheets using leather fibers comprising:

• pre-processing where leather wastes are neutralized and fatliquoring agents are adhered wherein the pre-processing includes:
• neutralizing the leather wastes;
• washing the leather wastes that have undergone the neutralizing;
• combining the fatliquoring agents to the leather wastes after the washing;
• adhering the fatliquoring agents to the leather wastes after the combining;
• and washing the leather wastes after the adhering;
• separating leather fibers from the leather wastes of the pre-processing;
• mixing the leather fibers with fibers for improving a tensile strength of the leather fibers to produce a mixed leather fibers;
• and
• forming sheets by combining the mixed leather fibers with raw fabrics for flooring,
• wherein the forming includes:
• aligning the mixed leather fibers by using carding machines to produced aligned fibers;
• stacking the raw fabrics for flooring and the aligned fibers by crossing each other;
• and
• forming sheets by combining the raw fabrics for flooring to the aligned fibers where needle punches hit in 800 to 1,000 times.