Fig. 1.

Influence of penetration enhancers on adhesive properties of HMPSA. (n = 3) a influence on tackiness, b influence on peel strength, c influence on sheer strength; Control no enhancer; MEN menthol, OA oleic acid, DMF N,N-dimethylformamide, AZO azone, PG propylene glycol, NMP 1-methyl-pyrrolidinone, IPM isopropyl myristate