Evaluation of pressure-sensitive tape adhesion and backing directinality by excimer laser methods.

摘要

The effects of 248 nm KrF excimer laser irradiation on a pressure-sensitive adhesive tape bonded to a glass substrate wee investigated as a possible method to evaluate the quality of adhesin,as well as the directionality induced during manufacture.The model pressure-sensitive tape consisted of biaxially-oriented polypropylene (PP)tape coated with a hot-melt rubber resion.Analysis of the front-shot experiments,thich wee performed by irraciatin through the pp backing,allowed correlation between the excimer last irradiatin-induced detachment and the peel adhesin strength.For this purpose,peel tests were performed before and after laser shots.The directinality induced during manufacture resulted in a more ablated area in the strength direction than in the transverse directin when the bonded tapes were irradiated with an elliptically-shaped laser beam above the ablation threshold.A correlation was found between the detachment bubbles created by irradiation below the ablatio threshold and their respective peel adhesion values,which allows us to evaluate te quality of adhesion for pressure-sensitive tapes.Thus,a method to evaluate the quality of adhesion using an excimer laser is proposed based on the findings of this work.