Abstract: A fluid filter media including a first media layer, a second media layer, a filter layer disposed between the first media layer and the second media layer, and a plurality of spaced apart weld points that couple the first media layer, the filter layer, and the second media layer together, where the weld points distort the surface of the first media layer and the second media layer, the fluid filter media is folded back on itself to form a plurality of pleats, and the surface distortions permit fluid flow through the fluid filter media when adjacent surfaces of the fluid filter media touch.

Abstract: A burnthrough resistant non-woven mat is made of a glass fibers and includes a binder having a vinyl component and a strengthening component. The vinyl component may be, for example, ethylene vinyl chloride, and the strengthening component may be, for example, melamine formaldehyde. The burnthrough resistant non-woven mat may be used in conjunction with an insulation blanket, and may be especially suited to use in insulating aircraft. Methods of making the burnthrough resistant non-woven mat are discussed.

Abstract: A fluid filter media including a first media layer, a second media layer, a filter layer disposed between the first media layer and the second media layer, and a plurality of spaced apart weld points that couple the first media layer, the filter layer, and the second media layer together, where the weld points distort the surface of the first media layer and the second media layer, the fluid filter media is folded back on itself to form a plurality of pleats, and the surface distortions permit fluid flow through the fluid filter media when adjacent surfaces of the fluid filter media touch.

Abstract: Provided is a filter medium comprised of core-sheath fibers wherein the sheath portion comprises an effective amount of antimicrobial agent. Preferably, all fibers of the filter medium comprise such core-sheath fibers, so that every fiber of the filter medium contains the antimicrobial agent to effectively deter bacterial growth.

Abstract: A biosoluble glass fiber filtration media includes a fibrous filtration layer of randomly oriented, entangled glass fibers which has an initial efficiency of 25% or greater as measured by ASHRAE 52.1 test method. The glass fibers forming the media have a biodissolution rate in excess of 150 ng/cm2/hr and a mean diameter between about 2.5×10−5 inches and about 11.0×10−5 inches. Typically, the filtration layer has a thickness ranging from about 0.12 inches to about 0.35 inches and a density ranging from about 3.0 g/ft2 to about 8.0 g/ft2. The filtration has an initial pressure drop of about 0.35 inches of water or less and a dirt holding capacity of about 1.5 g/ft2 or greater.

Abstract: A composite filter media includes a fibrous filtration layer of randomly oriented fibers and one or more pleatable stiffening layers which enable the composite filter media to be pleated and hold or retain its pleats. The pleatable stiffening layer(s) may enhance the dirt holding capacity of the composite filter media especially when positioned upstream of the fibrous filtration layer. The composite filter media may also include a flexible covering layer which functions to block the loss of fibers from the fibrous filtration layer. Preferably, the mean fiber diameter of the fibers in fibrous filtration layer increases and the density of the fibrous filtration layer decreases throughout the thickness of the fibrous filtration layer from one major surface to the other major surface of the fibrous filtration layer.

Abstract: A composite filter media includes a fibrous filtration layer of randomly oriented fibers and one or more pleatable stiffening layers which enable the composite filter media to be pleated and hold or retain its pleats. The pleatable stiffening layer(s) may enhance the dirt holding capacity of the composite filter media especially when positioned upstream of the fibrous filtration layer. The composite filter media may also include a flexible covering layer which functions to block the loss of fibers from the fibrous filtration layer. Preferably, the mean fiber diameter of the fibers in fibrous filtration layer increases and the density of the fibrous filtration layer decreases throughout the thickness of the fibrous filtration layer from one major surface to the other major surface of the fibrous filtration layer.

Abstract: A composite filter media includes a fibrous filtration layer of randomly oriented fibers and one or more pleatable stiffening layers which enable the composite filter media to be pleated and hold or retain its pleats. The pleatable stiffening layer(s) may enhance the dirt holding capacity of the composite filter media especially when positioned upstream of the fibrous filtration layer. The composite filter media may also include a flexible covering layer which functions to block the loss of fibers from the fibrous filtration layer. Preferably, the mean fiber diameter of the fibers in fibrous filtration layer increases and the density of the fibrous filtration layer decreases throughout the thickness of the fibrous filtration layer from one major surface to the other major surface of the fibrous filtration layer.