US2012048797A1PendingUtilityA1

Fiber web having a high stiffness

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Assignee: SMITH BRUCEPriority: Jun 19, 2009Filed: Nov 10, 2011Published: Mar 1, 2012
Est. expiryJun 19, 2029(~2.9 yrs left)· nominal 20-yr term from priority
Inventors:Bruce SmithSudhakar Jaganathan
D04H 1/72B01D 39/163B01D 39/00B01D 46/0001D04H 1/435D04H 1/4382D04H 1/542D04H 1/587B01D 29/016B01D 2239/0216B01D 2239/064B01D 2239/065B01D 2239/086B01D 2239/1258B01D 2239/1275B01D 2239/1291B29C 53/24B32B 37/04B32B 2305/20Y10T442/20Y10T442/60
56
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Claims

Abstract

The fiber webs described herein may be incorporated into filter media and filter elements. The webs may exhibit a high permeability and stiffness, at a low thickness. The stiffness can be sufficient for the webs to be pleated to include sharp, well-defined peaks which can be maintained in a stable configuration during use.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A fiber web having a permeability of greater than about 400 cfm/sf, a stiffness of greater than about 400 mg, and a thickness of less than about 20 mils. 
     
     
         2 . The fiber web of  claim 1 , wherein the fiber web is a nonwoven web. 
     
     
         3 . The fiber web of  claim 1 , wherein the fiber web includes synthetic fibers. 
     
     
         4 . The fiber web of  claim 1 , wherein the fiber web includes bicomponent fibers. 
     
     
         5 . The fiber web of  claim 4 , wherein the weight percent of the bicomponent fibers is greater than 50 percent by weight of the total weight percent of the fibers in the fiber web. 
     
     
         6 . The fiber web of  claim 1 , wherein the fiber web includes binder fibers and non-binder fibers. 
     
     
         7 . The fiber web of  claim 6 , wherein the binder fibers comprise greater than 50 percent by weight of the total weight of fibers in the fiber web. 
     
     
         8 . The fiber web of  claim 6 , wherein the binder fibers are multi-component fibers. 
     
     
         9 . The fiber web of  claim 1 , wherein the fiber web includes a resin. 
     
     
         10 . The fiber web of  claim 9 , wherein the resin is in latex form. 
     
     
         11 . The fiber web of  claim 9 , wherein the fiber web includes binder fibers comprising a polymer in the same class as the resin. 
     
     
         12 . The fiber web of  claim 11 , wherein the binder fibers are multi-component fibers. 
     
     
         13 . The fiber web of  claim 11 , wherein the binder fibers and the resin comprise a polyester. 
     
     
         14 . The fiber web of  claim 1 , wherein the fiber web has a stiffness of between about 400 mg and about 1700 mg. 
     
     
         15 . The fiber web of  claim 1 , wherein the fiber web has a thickness of between about 12 mils and about 20 mils. 
     
     
         16 . The fiber web of  claim 1 , wherein the fiber web has a basis weight of between about 40 g/m2 and about 300 g/m2. 
     
     
         17 . The fiber web of  claim 1 , wherein the fiber web has a SFI after 5 seconds of less than about 70°. 
     
     
         18 . The fiber web of  claim 1 , wherein the fiber web has a permeability of between about 500 cfm/sf and about 1200 cfm/sf, a stiffness of between about 400 mg and about 1700 mg and a thickness of between about 12 mils and about 20 mils. 
     
     
         19 . The fiber web of  claim 18 , wherein the fiber web is a nonwoven web and the fiber web includes synthetic fibers and bicomponent fibers, and the weight percent of the bicomponent fibers is greater than 50 percent by weight of the total weight percent of the fibers in the fiber web. 
     
     
         20 . The fiber web of  claim 1 , wherein the fiber web has a permeability of greater than about 500 cfm/sf. 
     
     
         21 . The fiber web of  claim 20 , wherein the fiber web has a permeability of between about 500 cfm/sf and about 1200 cfm/sf. 
     
     
         22 . The fiber web of  claim 20 , wherein the fiber web is a nonwoven web and the fiber web includes synthetic fibers and bicomponent fibers, and the weight percent of the bicomponent fibers is greater than 50 percent by weight of the total weight percent of the fibers in the fiber web. 
     
     
         23 . The fiber web of  claim 20 , wherein the fiber web includes a resin. 
     
     
         24 . The fiber web of  claim 23 , wherein the resin is in latex form. 
     
     
         25 . The fiber web of  claim 20 , wherein the fiber web includes binder fibers comprising a polymer in the same class as the resin. 
     
     
         26 . The fiber web of  claim 25 , wherein the binder fibers are multi-component fibers. 
     
     
         27 . The fiber web of  claim 24 , wherein the binder and the resin are a polyester. 
     
     
         28 . A filter media comprising the fiber web of  claim 1  as a backing and a second fiber web attached to the backing. 
     
     
         29 . The filter media of  claim 28 , wherein the second fiber web comprises melt blown fibers. 
     
     
         30 . The filter media of  claim 28 , wherein the fiber web includes a resin. 
     
     
         31 . The filter media of  claim 30 , wherein the fiber web includes binder fibers comprising a polymer in the same class as the resin. 
     
     
         32 . The filter media of  claim 31 , wherein the binder fibers are multi-component fibers. 
     
     
         33 . The filter media of  claim 28 , wherein the fiber web has a permeability of between about 500 cfm/sf and about 1200 cfm/sf, a stiffness of between about 400 mg and about 1700 mg and a thickness of between about 12 mils and about 20 mils. 
     
     
         34 . The filter media of  claim 28 , wherein the fiber web has a stiffness of between about 500 mg and about 1700 mg. 
     
     
         35 . A filter element comprising the fiber media of  claim 28 .

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