Development of a new test method for measurement of tack and studies on tack between cap and base compounds

A new test method has been developed to measure the autohesive tack between cap and base compounds at higher temperatures of contact. This method is a modification of the 180° peel test by incorporating a separator or a perforated sheet at the interface. This gives reproducible results and simulates the coextrusion process at a relatively higher temperature of contact.

The effects of reinforcing filler, oil, contact temperature, contact area, contact time and peel rate on tack are reported here.