Pleated fluid filter medium blend
DCFirst Claim
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1. A self supporting pleated fluid filter medium including an upstream and downstream side comprising:
- a blend by weight of preselected different fibers at least one of which is of preselected low melt fiber material with a portion of low melt fiber material method into said blend, said blend having at least a sufficient stiffness to provide for self supporting pleats sufficient to maintain pleat form during an anticipated fluid filtering treatment velocity, said blend by weight of preselected fibres comprising approximately five (5) to fifty (50) percent (%), six (6) denier fibers, zero, (0) to forty (40) percent (%) one (1) denier fibers, and thirty (30) to ninety-five (95) percent (%) preselected low melt fibers.
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Abstract
A self supporting pleated fluid filter medium having different fibers to provide pleats sufficiently self supporting to maintain pleated form during fluid filter treatment, the invention further including low melt fiber and an optional support frame and a method of making such pleated filter.
52 Citations
14 Claims
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1. A self supporting pleated fluid filter medium including an upstream and downstream side comprising:
- a blend by weight of preselected different fibers at least one of which is of preselected low melt fiber material with a portion of low melt fiber material method into said blend, said blend having at least a sufficient stiffness to provide for self supporting pleats sufficient to maintain pleat form during an anticipated fluid filtering treatment velocity, said blend by weight of preselected fibres comprising approximately five (5) to fifty (50) percent (%), six (6) denier fibers, zero, (0) to forty (40) percent (%) one (1) denier fibers, and thirty (30) to ninety-five (95) percent (%) preselected low melt fibers.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A self Supporting air filter medium including an upstream and downstream side comprising:
- a blend by weight of preselected fibers comprises approximately five (5) to fifty (50) percent (%) six (6) denier fibers, zero (0) to forty (40) percent (5) one (1) denier fibers, and thirty (30) to ninety five (95) percent (%) preselected low melt fibers having the downstream side of the filter medium blend with a greater concentration of zero (0) to (40) percent (%) one (1) denier fibers wherein said filter medium blend has a Gurley stiffness along any direction of medium in the approximate Gurley stiffness range of four hundred (400) to sixteen hundred (1600) milligrams.
Specification