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United States Department of Agriculture

Agricultural Research Service

Research Project: NEW AND EFFICIENT PROCESSES FOR MAKING QUALITY LEATHER Title: Characterization of Polymeric Coatings Using Acoustic Emission Techniques

Authors
item Liu, Cheng Kung
item Latona, Nicholas

Submitted to: American Chemical Society National Meeting
Publication Type: Proceedings
Publication Acceptance Date: May 31, 2005
Publication Date: August 1, 2005
Citation: Liu, C., Latona, N.P. 2005. Characterization of polymeric coatings using acoustic emission techniques. American Chemical Society, Division of Polymeric Materials: Science and Engineering. PMSE Preprints. 97:905-906.

Technical Abstract: As a fibrous collagen material, leather is economically significant because it is a major coproduct derived from the meat industry. Finishing, the final step in the leather-making process, contributes to the beauty and durability of leather. Choosing the right polymeric coating is critical in obtaining a satisfactory finishing result, such as good flexing endurance and no surface cracking. Acoustic emission (AE) has been shown to be a useful method to characterize the physical properties of polymeric fibrous materials. We recently exploited the AE techniques to measure the flexing endurance of polymeric coatings for leather. An acoustic sensor was clipped to the grain layer of finished leather in a tensile test to collect various acoustic quantities. Observations showed that differences in the flexibility of the coatings can be determined by examining the plot of the AE count rate as a function of time. We have concluded that a quantitative association exists between the flexibility of coatings and the cumulative acoustic counts produced at an initial tensile stretch. The results of this AE research provide a route to examine the flexing endurance of leather coatings.

Last Modified: 4/20/2014
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