Effect of Several Factors on the Mechanical Properties of Pressure-Sensitive Adhesive

Abstract

The effects of coating thickness, type of adhesive, and type and concentration of enhancer o­n the mechanical properties of two acrylic pressure-sensitive adhesives (PSAs) were investigated using a 24 factorial design and an optimization technique. Sixteen formulations containing 0% or 10% of either caprylic acid or methyl laurate in two different PSAs, namely Duro-Tak® 87-2196 and Duro-Tak® 87-2097, were prepared. The adhesive properties of these laminates were evaluated by applying the 900 Dynamic Adhesive Strength Peel Test (900 DASPT) and 1800 Release Liner Peel Test (1800 RLPT). Coating thickness, concentration of enhancer, and type of adhesive did affect the 900 DASPT. For the 1800 RLPT, the most significant factors were coating thickness and concentration of enhancer, with a strong interaction observed between the two. Coating thickness and concentration of enhancer were also used to create mathematical models that correlated these factors with the mechanical properties of the PSAs. For this purpose, the optimization technique 32 was applied. It was found that the correlation of the above factors can be adequately described with polynomial equations, which can be used for predicting the mechanical properties of the laminates containing the above PSAs and methyl laurate (0%-10%).

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