Reinforced filter media
Assignee3M Innovative Properties Company
InventorsSeyed A. Angadjivand, Marvin E. Jones, Philip G. Martin, John M. Brandner
Life of this patent
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Abstract
Reinforced filter media are prepared by adhering discrete, non-intersecting strands of thermoplastic or thermoset materials to the filter media web. The filter media may be a fabric, a nonwoven web or a filtering foam. The reinforced filter media can be used to prepare respirators, including flat-fold respirators or molded respirators.
Claims32
A respirator comprising:
- a reinforced filter media, the reinforced filer media comprising:
- a polymeric web;
- and
- discrete, non-intersecting strands of reinforcing material attached to the web.
A method of making a filter media comprising:
- providing a polymeric web;
- and
- contacting discrete, non-intersecting strands of reinforcing material to at least one surface of the web, wherein the strands of reinforcing material adhere to the polymeric web.
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A method of preparing a respirator comprising:
- providing a reinforced filter media wherein the reinforced filter media comprises
- a polymeric web and discrete, non-intersecting strands of reinforcing material attached to the web;
- and
- forming a respirator.
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A method of preparing a respirator comprising:
- providing a filter media web;
- preparing a reinforced polymeric web, the reinforced polymeric web comprising a fabric, a nonwoven web, or a filtering foam and discrete, non-intersecting strands of reinforcing material attached to the polymeric web;
- layering together the filter media web and the reinforced polymeric web;
- and
- forming a respirator.
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Dependencies are inferred from the claim text.