Optimized wax for sealing the edge of a filter sheet

Details Optimized wax for sealing the edge of a filter sheet Optimized wax for sealing the edge of a filter sheet

1998-09-29

2000-10-17

Walker, W. L.

Liquid purification or separation

Sectional chamber press type

Medium clamped in joint

210227, 210507, 210508, 210495, 210450, 55502, 55511, 428192, 428484, B01D 25127, B01D 25164

Patent

active

061326089

ABSTRACT:
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.degree. C. and 85.degree. C., a melt point of about 110.degree. C. to about 180.degree. C., and a viscosity of less than about 100 cp at 155.degree. 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.

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