Optimized wax for sealing the edge of a filter sheet

摘要

A filter sheet positioned between plates (14) of a filter press has a fluid-impermeable wax layer (11) sealing the sheet's perimeter. The wax preferably comprises ethylene bis stearamide and has a durometer reading of about 75 to about 100 Shore A hardness at 25 DEG C. and 85 DEG C., a melt point of about 110 DEG C. to about 180 DEG C., and a viscosity of less than about 100 cp at 155 DEG C. The wax layer increases the useful life of the filter sheet while providing a sheet which is easily released from a filter press and which retains integrity along the seal during repeated hot water sanitations.