Ongoing research in the CCI lining project: peel testing of BEVA 371 and wax-resin adhesives with different lining supports

Peel testing can assist in determining the suitability of a lining-adhesive system. This paper describes peel testing of wax- resin and Beva 371 lining adhesives with various lining supports. Wax-resin bond strengths with untreated lining supports ranged between 715 N/m and 67 N/m and were mainly dependent on the surface texture of the lining material. BEVA bond strengths with untreated lining supports ranged between 1476 N/m and 211 N/m. Repeat BEVA samples, prepared at a later date, but as similarly as possible to earlier samples, had different bond strengths. Thus, small differences in preparation and lining conditions produced major differences in peel strength. The effect of pre-treatment of selected lining supports is discussed. Studies on the effect of peel configuration, peel rate and ageing on peel strength are mentioned. It is recommended that peel tests be used only as guidelines rather than absolute quantitative measurements, as small differences in procedure can produce large differences in bond strengths. -- CAL