Abstract: A fibrous material or composite including a plurality of layers joined to one another, for example, by needlepunching, is disclosed. The fibrous composite generally has an asymmetrical stretch profile, such that the fibrous composite is more extensible in the cross-machine direction than in the machine direction. The fibrous composite may find particular use in forming a cure-in-place pipe liner.

Abstract: According to an aspect, the present embodiments may be associated with a heat shield including a retention feature or member. In an embodiment, the retention member is integrated with the heat shield body and includes a trilobal shaped aperture formed therein. The trilobal shaped aperture is adapted and configured to receive and temporarily retain a fastener. Thus, the heat shield is capable of at least being temporarily held in place prior to the use of permanent installation techniques.

Abstract: A fibrous material or composite including a plurality of layers joined to one another, for example, by needlepunching, is disclosed. The fibrous composite generally has an asymmetrical stretch profile, such that the fibrous composite is more extensible in the cross-machine direction than in the machine direction. The fibrous composite may find particular use in forming a cure-in-place pipe liner.

Abstract: According to an aspect, the present embodiments may be associated with a heat shield including a retention feature or member. In an embodiment, the retention member is integrated with the heat shield body and includes a trilobal shaped aperture formed therein. The trilobal shaped aperture is adapted and configured to receive and temporarily retain a fastener. Thus, the heat shield is capable of at least being temporarily held in place prior to the use of permanent installation techniques.

Abstract: A cross-lapped multilayered batt, and a method of making the same is presented. The batt includes one or more layers of a carded web of staple fibers, and one or more continuous filament fiber layers. At least some of the staple fibers and, in some instances, some of the continuous filament fibers are mechanically entangled through a thickness of the batt. The method includes folding both the carded web and the continuous filament fiber layers together, and subjecting the folded layers to a needle-punching process to impart structural stability and enhance the Z-directional strength of the batt.

Abstract: A fibrous structure suitable for use as a battery separator is described. The fibrous structure may include a plurality of plies or layers. Each ply or layer serves to provide a barrier function and an absorbent function, such that the multilayer fibrous structure is suitable for use as a battery separator, for example, an alkaline battery separator.

Abstract: An acoustical insulator having a composite air flow resistance is presented. The insulator may be for being positioned within a void space, and may include first and second sheets. The sheets may be joined to each other in an overlapping configuration along their respective peripheral edges, thereby defining an overlapped area between them. The sheets may include contours, such that the acoustical insulator substantially conforms to a peripheral boundary of the void space. The overlapped area may define a substantially closed air gap between the adjoined first and second sheets, the air gap having variable gap lengths along the respective sheet areas. The density of at least one of the sheets may vary with the variable gap length, so that the sheets and air gap collectively provide a composite air flow resistance through the insulator to absorb noise at a predetermined peak frequency.

Abstract: According to an aspect, the present embodiments may be associated with a wet-laid, nonwoven material including high temperature refractory fibers and thermoplastic fibers formed into the nonwoven material using a wet-laid process. In an embodiment, a fluoropolymer is included in the nonwoven material. In an embodiment, the refractory fibers are at least partially cleaned of shot and latex binder or binder fiber is eliminated or at least substantially reduced.

Abstract: According to an aspect, the present embodiments may be associated with a heat shield including a sealing member. In an embodiment, the sealing member is positioned along at least a portion of a partially hemmed edge and retained thereby. Thus, the heat shield is capable of providing insulative and/or sealing properties when used, specifically thermal, vibrational and/or acoustical shielding, as well as limiting fluid flow across the edge of the heat shield.

Abstract: According to an aspect, the present embodiments may be associated with a wet-laid, nonwoven material including high temperature refractory fibers and thermoplastic fibers formed into the nonwoven material using a wet-laid process. In an embodiment, a fluoropolymer is included in the nonwoven material. In an embodiment, the refractory fibers are at least partially cleaned of shot and latex binder or binder fiber is eliminated or at least substantially reduced.

Abstract: A wet-laid dual-layer air filtration media having a thin, lightweight top layer and a bottom layer is provided. The novel media includes a large diameter synthetic polymeric fiber in the top layer that deforms plastically and retains cohesion as a single object, while minimizing use of frangible components that become airborne upon handling. The novel media provides improved high dust holding capacity, while typically maintaining an overall lower basis weight than heretofore available media.

Abstract: A gradient density padding material includes a single layer of nonwoven material having at least one surface processed to form a portion of a thickness thereof having a density increased with respect to a remaining portion of the thickness thereof. The single layer of nonwoven material after processing has an airflow resistance within the range of 200-4000 MKS Rayls, wherein said single layer of nonwoven material has an enhanced acoustic performance. A method of making a gradient density padding material having an enhanced acoustic performance includes the steps of providing a single layer of nonwoven material and processing at least one surface of the single layer of nonwoven material to form a portion of a thickness thereof having a density increased with respect to a remaining portion of the thickness thereof. The single layer of nonwoven material after processing has an airflow resistance within the range of 200-4000 MKS Rayls.

Abstract: A pleatable, high efficiency composite gas filtration media is provided. The media includes an essentially boron free chopped strand glass backer layer and media layer comprising a synthetic material. The composite media exhibits excellent pleatability, low boron out gassing, and low organic out gassing, with filtration performance comparable to existing commercial membrane composites.

Abstract: Disclosed is a separation media, comprising an upstream layer, comprising fibers, wherein the upstream layer has a mean flow pore size of 8 microns or less; and a downstream layer, comprising fibers. The separation media is designed to separate red blood cells from liquid specimens such as blood and allow a filtrate, such as blood plasma, to flow from said downstream layer. Also provided is a diagnostic test device incorporating the separation media. Further disclosed is a method for separating red blood cells from a liquid specimen.

Abstract: Disclosed is a media (such as a filter media) having one or more carbon nanotube (CNT)-containing layer. Each CNT-containing layer contains high temperature refractory fibers (e.g., staple quartz fibers and/or ceramic refractory fibers) that have melting temperatures greater than about 600° C. and in situ grown CNTs. Substantially all of the in situ grown CNTs have one end thereof associated with the fibers. This results in substantially all of the in situ grown CNTs extending away from substantially all of the fibers. Moreover, substantially all of the in situ grown CNTs are dispersed throughout the fibers. In one embodiment the media also includes one or more supporting layer. Each supporting layer contains high temperature refractory fibers that have melting temperatures greater than about 600° C., optionally bulk refractory fibers, optionally E-glass fibers, and optionally microglass fibers.

Abstract: There is provided a substrate (1) capable of carrying uniformly dispersed, finely divided, particulate, solid particles, e.g., catalyst particles (10) and sustaining temperatures in excess of 1200 degrees F. The substrate comprises a top layer (2) for containing the particles (10) and composed of quartz fibers (4) with an average diameter of between about 0.1 and 4 microns and about 0 to 13% of microglass fibers having a softening point of about 1000 degrees F. A support layer (3) is composed of the fibers of the top layer and, in addition, bulk refractory, e.g., ceramic, fibers (6) having and average diameter of about 1 to 4 microns and 0 to 50% of chopped e-glass fiber (7). A method for producing the substrate is provided that includes wet laying the top and bottom layers in spaced apart times so that the juncture (8) between the two layers has intermingled fibers whereby the consolidated layers are not easily separated.

Abstract: The invention provides an improved facing (1) for a gypsum wallboard (22) that has a single layer (2) of nonwoven substrate (3) having about 40-80% of glass staple fibers (4) and about 50-15% of polymeric fibers (5), and wherein the ratio of the diameters of the glass fibers (4) and the polymeric fibers (5) is between about 1.5-3:1. A hydrophilic binders is disposed in the substrate (3) in the form of a porous film (10) that extents throughout the substrate (3) so as to provide the substrate, having only the binder therein, with a porosity of between about 150-450 cfm/sq. ft. A hydrophobic, polymeric coating (6) is applied to an upper front face (7) of the substrate (3), wherein 90% of the coating (6) lies within a distance from the front face (7) of the substrate (3) that is no more than 50% of the thickness (T) of the substrate (3).

Abstract: The invention provides a composite, dual layer filtration material (1) having a gradient structure, comprising a dust layer (2) of wet laid dust fibers (5), a HEPA layer (3) of wet laid HEPA fibers (6) laid on top of the dust layer (2), and a transition zone (4) between dust layer (2) and HEPA layer (3) of a mixture of wet laid dust fibers (5) and wet laid HEPA fibers (6), and wherein the transition zone (4) so bonds the dust layer (2) to the HEPA layer (3) such that the composite (1) may be pleated into a pleated HEPA filtration material (30) without substantial disruption of the bond between the two layers. A corresponding process is also provided.

Abstract: A process is provided for producing improved, superior and more cost effective glass micro fibers, wherein molten glass in filament form is attenuated into glass micro fibers by gasses of a combusted mixture of air and fuel. The improvement comprises introducing into the mixture a gas stream containing at east 70% by volume of oxygen. This avoids problems in glass micro fiber production where the quality of the fibers varies from time to time, as demonstrated by the quality of paper produced therefrom. An apparatus for producing the fibers is also provided, as well as improved glass micro fibers and improved papers made therefrom.

Abstract: A flexible, adhesively attachable, self-sealing, thermal and acoustical insulating shield has a needled, flexible, fibrous batt having an insulating layer of insulating fibers disposed between opposite binding layers of binding fibers. Binding fibers of each binding layer are needledly disposed through the insulating layer and an opposite binding layer to provide tufts of binding fibers protruding from the opposite binding layer so a to form a tufted upper surface and a tufted lower surface of the batt. A flexible adhesive is disposed and adhered substantially over the upper surface and, preferably, over lower surface of the batt such that the tufts on the upper and lower surfaces are secured to the surfaces by the adhesive. A flexible, protective foil is adjacent to, and preferably permanently adhered by the adhesive to, the lower surface of the batt.