Kc. Sehgal et Dr. Bassett, ROLE OF MATERIAL AND FORMULATING PARAMETERS IN THE ADHESION OF EMULSION PRESSURE-SENSITIVE ADHESIVES, Le Vide, les couches minces, (272), 1994, pp. 203-207
Citations number
8
Categorie Soggetti
Physics, Applied","Materials Science, Coatings & Films
The paper describes the effect of certain certain polymer and formulat
ing parameters on the adhesion and application properties of pressure
sensitive later adhesives. Increasing polar functional group content a
nd molecular weight results in an increase in shear adhesion and decre
ase in peel adhesion. However, the effect is not straightforward. Peel
and shear obey an inverse linear relationship. A proper combination o
f the type and level of polar functional group and molecular weight/di
stribution leads to optimization of peel/sheer balance. Tackifiers and
plasticizers increase peel and tack; tackifiers because of their uniq
ue impact on rheological properties have limited adverse effect on she
ar, but plasticizers greatly reduce it. Wetting agents, defoamers and
theology modifiers in proper ratio improve application characteristics
without a detrimental effect on adhesion. The observed effects are an
alyzed in terms of the surface and bulk contributions. Practical utili
ty of these results for optimizing adhesive systems is pointed out.