Patent ID: 7717986
Filing Date: 2010-05-18
Classification: B01D,B60H,Y10S,Y10T

Abstract:
1. A vehicle passenger compartment air filter device comprising a filtration medium comprising (i) a meltblown nonwoven web of electret charged thermoplastic microfibers as a filter layer, said microfibers having an effective fiber diameter (EFD) of greater than 10 μm and comprising a thermoplastic resin having a resistivity greater than 10 (ii) a gas adsorption layer comprising an adsorbent particle loaded layer and optionally further comprising a support layer and/or a cover layer bonded to said adsorbent layer, wherein basis weight of adsorbent particles in gas adsorption layer is at least 150 g/m said filter layer being upstream from the gas adsorption layer and the filter layer and gas adsorption layer being co-pleated and substantially non-bonded to one another except optionally at one or more of the outer edges of the filtration medium;