Adhesive strength expression unit, adhesive label issuing device and printer

摘要

A pressure-sensitive adhesive force expressing unit including: a thermal head including heater elements arranged along a width direction of a label, the thermal head being configured to heat the label, from an adhesive layer side to form openings in a function layer by the heater elements; and a controller for applying heat energy to the heater elements individually to control heat generation thereof, the controller being configured to control the application of heat energy to the heater elements so that opening lines in each of which the openings are arranged in the width direction of the label are formed in the conveyance direction and to control the application of heat energy so that adjacent at least two of the heater elements generate heat at the same time to form an opening group in which the openings are connected together in the width direction.