Importance of the surface treatment in the peeling strength of joints for the shoes industry

In order to contribute to the research and development of adhesives for the shoe industry, this paper aims to analyze the peel strength of an adhesive joint with various types of surface treatments. In the shoe industry, the adhesive properties are very important to ensure the quality of manufacture of the shoe, thus, to better understand the behaviour of the adhesive joint, it is important to analyze the peel resistance in order to adjust the manufacturing process. For the execution of this work, we considered the following materials: natural leather, thermoplastic rubber (TR), polyurethane (PU) and a polyurethane non structural adhesive solvent based. This paper analyzes the influences of the application of chemical and/or physical surface treatments on substrates in the peel strength of a T joint. It was found that certain surface treatments, depending on the substrate, are required to obtain an adhesive joint capable of satisfying the minimum required by the shoes sector. The main conclusion is that adhesive joints meet the show industry requirements with the application of chemical treatments for TR and mechanical treatments for leather and PU.

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