Abstract
Canvas patching utilizes various adhesives for localized reinforcement treatment, yet evaluations of their properties remain insufficient. This study presents surface changes and physical properties observed when seven types of lining adhesives, selected from prior research, were applied. Evaluations included contact angles, color changes, surface alterations, and tensile strength. Results indicated that glue paste was highly susceptible to moisture and exhibited decreased flexibility with environmental changes, while Beva film showed the most significant reduction in adhesion. Both glue paste and Beva film were sensitive to color changes, primarily displaying yellowing and browning. Plextol B500 demonstrated the greatest increase in adhesion and flexibility under environmental stress. Welding powder exhibited high adhesion but lower strain rates, causing notable deformations across the canvas. Within the same adhesive composition, higher hydrophilicity correlated with reduced yield stress and maximum strain, suggesting that hydrophilicity affects adhesion and flexibility. Adhesives with lower thermal decomposition and glass transition temperatures experienced greater changes in adhesion and flexibility. Rapid changes in adhesion following localized reinforcement treatment can lead to issues like peeling of reinforcing fabric or deformation of the canvas.
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