engleski

Influence of different tanning agents on thermal resistance of leather under different climate conditions

Leather owns its unique property of breathability through porous structure. Leathers structure and their pores connectivity influence on heat transport processes. All leather treatments, including tanning process and different tanning agents, significantly change leather structure. There are more tanning agents used in leather production, where chromium, vegetable and synthetic tanning agents are most common. The same type of bovine leather was tanned with different tanning agents, respectively chromium and synthetic. The thermal resistance of the leathers was tested on Sweating Guarded Hot Plate according to the standard ISO 11092:2014. Influence of chromium and synthetic tanning agents on thermal resistance of the leather under standard condition was investigated. Quite often, leather intended for footwear is used for protection against cold environment where the total comfortability of the footwear made up of leather depends on many factors. Thermal comfort of footwear made up of leather is accomplished by balancing three factors: insulation value (of the leather), rate of heat transfer (heat rate from the human body to its surroundings) and present environment temperature. A human body must maintain a skin temperature of 34°C and to be in thermal balance with present environment so that a person would feel comfortable. Considering above listed factors, insulation value of leather is important parameter to provide footwear thermal comfort. Measuring a leather insulation values can provide information for prediction final product performance. The second objective of the paper is to study one of the main comfort parameters, thermal resistance (m2 K W-1), of chromium and synthetic tanned leathers.

Leather, Tanning agents, SGHP, Thermal resistance

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