METHOD FOR IMPROVING CHARACTERISTIC OF MID-SOLE FOR SHOES BY USING LEATHER SHAVING DUST

摘要

PURPOSE: A method is provided to increase the tension intensity of a mid-sole and absorption and to improve a characteristic such as adhesiveness and so on by adding up a regular amount of leather shaving dust generated in a large amount in a leather processing process by using fiber fragments. CONSTITUTION: A powder degree of leather shaving dust is divided by using a sieve of a 4.75mm passage diameter after drying the leather shaving dust consisted of 80% of powder of which a diameter is less than 4.75mm, including 60% of water a certain degree. Then, the leather shaving dust is neutralized since the acidity of a leather shaving dust solution shows the weak acidity of 3 to 4 and is soaked in a weak acid or alkali solution for 1 to 2 hours to improve the characteristic of a fiber-leather compound body by dissolving some part of a surface protein structure of the leather shaving dust.