Pleated aligned web filter
First Claim
Patent Images
1. A filter element that comprises:
- a nonwoven filtration web that has rows of folded pleats and that contains thermoplastic fibers, a majority of which fibers are aligned at 90°
±
20°
with respect to the row direction.
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Abstract
A filter element that has rows of folded pleats and includes a nonwoven filtration web that contains thermoplastic fibers, a majority of which fibers are aligned at 90°±20° with respect to the row direction. The filter elements can be made by forming rows of pleats in such a nonwoven web and cutting the web to a desired size and shape. The filter elements can provide improved mechanical and filtration properties.
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Citations
28 Claims
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1. A filter element that comprises:
a nonwoven filtration web that has rows of folded pleats and that contains thermoplastic fibers, a majority of which fibers are aligned at 90°
±
20°
with respect to the row direction.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of making a pleated filter element, which method comprises:
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forming rows of pleats in a nonwoven filtration web that comprises thermoplastic fibers, a majority of which fibers are aligned at 90°
±
20°
with respect to the row direction;
and cutting the pleated filter element to a desired size and shape. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification