Author： Poh B. T. Chee C. L.
Publisher： Taylor & Francis Ltd
ISSN： 0091-4037
Source： International Journal of Polymeric Materials, Vol.56, Iss.3, 2007-03, pp. : 247-255
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Abstract
The viscosity, tack, and peel strength of a natural rubber (SMR 20)-based pressure-sensitive adhesive (PSA) was studied using coumarone-indene resin as the tackifier. The resin loading was varied from 0-80 parts per hundred parts of rubber (phr). Toluene was used as the solvent throughout the experiment. The viscosity of PSA was measured using a Haake Rotary Viscometer whereas loop tack and peel strength were determined using a Lloyd Adhesion Tester. PSA was coated onto the substrates using a SHEEN hand coater to give a coating thickness of 60 m and 120 m. Results show that the viscosity and tack of the adhesive increases with resin content due to the concentration effect of tackifier resin. However, for the peel strength, it increases up to 40 phr of resin for both coating thickness, an observation that is attributed to the wettability of substrates.
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