High strength, high capacity filter media and structure
First Claim
1. A method of filtering a non-aqueous liquid comprising a fuel, a lubricant, a hydraulic fluid, or a brake fluid, the method consisting essentially of:
- passing the non-aqueous liquid with a particulate load through a filter medium comprising a layer comprising 5 to 50 wt % of a bicomponent binder fiber, about 50 to 95 wt % of a glass fiber, and about 0.5 to 25 wt % of a binder resin, the layer having a basis weight of about 30 to 250 g-m−
2, the layer having a permeability of 10 to 50 ft-min−
1, a wet bursting strength of about 5 lb-in−
2 to 30 lb-in−
2; and
removing the particulate load.
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Accused Products
Abstract
In the filtration of fluid materials, the removal of particulate from the moving stream requires substantial pressure to maintain flow and substantial capacity for removing particulate. The filters of the invention are rugged, high wet strength materials having a basis weight, permeability and efficiency suitable to obtain substantial reduction in particulate loading from liquid streams without plugging or mechanical failure. In particular, the filters of the invention permit the removal of substantial proportions of particulate from non-aqueous streams including lubricant oils, hydraulic fluids and other contaminated streams.
465 Citations
7 Claims
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1. A method of filtering a non-aqueous liquid comprising a fuel, a lubricant, a hydraulic fluid, or a brake fluid, the method consisting essentially of:
- passing the non-aqueous liquid with a particulate load through a filter medium comprising a layer comprising 5 to 50 wt % of a bicomponent binder fiber, about 50 to 95 wt % of a glass fiber, and about 0.5 to 25 wt % of a binder resin, the layer having a basis weight of about 30 to 250 g-m−
2, the layer having a permeability of 10 to 50 ft-min−
1, a wet bursting strength of about 5 lb-in−
2 to 30 lb-in−
2; and
removing the particulate load. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- passing the non-aqueous liquid with a particulate load through a filter medium comprising a layer comprising 5 to 50 wt % of a bicomponent binder fiber, about 50 to 95 wt % of a glass fiber, and about 0.5 to 25 wt % of a binder resin, the layer having a basis weight of about 30 to 250 g-m−
Specification