This invention relates to the fields of functional materials and intelligent sensing technology, and discloses a method for intuitively visualizing the stretching amount of a flexible
adhesive. The method includes: providing a flexible
adhesive with an
elastic substrate capable of elastic deformation along the stretching direction; setting multiple patterned marking regions corresponding to different preset stretching thresholds on the surface of the
elastic substrate; forming microgroove structures with differentiated structural parameters at corresponding positions on the
elastic substrate to generate a differentiated
stress concentration effect; forming color-developing
layers containing mechanochromic materials with different bulk crosslinking densities in each patterned marking region, with each color-developing layer collectively constituting a patterned color-developing functional layer; through the synergistic effect of the differentiated
stress concentration effect of the microgroove structure and the difference in bulk crosslinking density of the color-developing
layers, each patterned marking region changes from a hidden state to a visible state when the corresponding stretching threshold is reached, thereby characterizing the stretching amount of the flexible
adhesive through pattern
visualization. This invention provides clear thresholds and high
readability, and is suitable for scenarios such as motion protection,
flexible electronics, intelligent packaging, and
structural condition early warning.