プローブタック試験における粘着剤タック特性と内部気泡の影響

抄録

Adhesives widely used for internal adhesion of industrial products have a problem of decreasing tack force due to thinning. Therefore, it is necessary to investigate the factors that govern the tack characteristics in order to develop new adhesives and explore appropriate storage methods. In this study, we focus on the bubbles inside the adhesive that are generated when the tack force is generated and clarify the relationship between the tack characteristics and the generation of the internal bubbles and the environmental conditions that dominate them. The probe tack test was performed under different conditions such as pressure and aging of the sample, and the relationship between the tack characteristics and internal bubbles was investigated from the obtained load displacement curve and the observed image. Furthermore, theoretical fingering wavelength and loads are compared with experimental results.