Filter media including nonwoven fiber webs comprising nanofibers, and related methods, are generally described.

The present teachings relate generally to a gas-duct whose channel body is manufactured from a plastic material, wherein the channel body has at least one region replaced by a sound absorbing component being made at least partially from at least one non-woven layer. The present invention further relates to a HVAC- and Battery- and/or battery-charge-system and to a method of producing a gas-duct.

A fine denier composite non-woven fabric comprising an upper layer fine denier fiber web composed of fibers with a fiber denier less than or equal to 1.0 denier and a lower layer coarse denier fiber web composed of fibers with a fiber denier of 2.0 deniers to 12.0 deniers; the upper layer fine denier fiber web being composed of side-by-side bi-component crimped spunbond long fibers, and adjacent fibers being bonded to each other through surface melting to form a fiber web.

A nonwoven fabric used for a foamed article reinforcing material to be bonded to a foamed material to reinforce the foamed article is a single-layer material in which stacked layers of a web are bonded together, has a thickness of 1 to 8 mm under a load of 7 g/cm.sup.2, and has a delamination strength of 0.05 to 2.45 N/cm. The delamination strength is a value of the pulling force required to peel the bonded layers of the web apart.

Flexible phenolic intermingled carbon ablators (PICAs) and processes for making the same are disclosed. These materials, which are also called PICA-Flex herein, combine both carbon and phenolic fiber constituents during the felting process rather than introducing the phenolic through costly and time intensive infusion processes that also use harsh chemicals. PICA-Flex drastically reduces integration complexities when compared to traditional phenolic infused rigid tiles and can eliminate the lengthy phenolic infusion process, resulting in a thermal protection system (TPS) material more akin to a blanket than a rigid TPS. This blanket TPS drastically reduces integration complexity when compared to traditional phenolic infused rigid tiles. PICA-Flex encompasses a range of configurations, including a dual layer PICA-Flex material with a higher density outer layer(s) to minimize recession, a lower density PICA-Flex material with applicability to aftbody TPS, and a single piece PICA-Flex forebody.

A vehicle interior panel includes a substrate with non-uniform hardness, providing cushioned portions of the panel without the need for a distinct cushioning layer. The substrate is made from a mat of natural and synthetic fibers that is heated and pressed so that the pressed mat has thick and thin portions. The thin portions are rigid and structural, and the thick portions are soft. Application of a decorative layer can be incorporated into the process, as can back-injection molding (BIM) for additional structure.

Non-woven filter media are provided that comprise a first melt-blown layer comprising fibers made from a polymer material. The polymer material comprises a thermoplastic resin and at least one of a charge adjuvant and a nucleating agent. The media further comprises a second layer and a third layer arranged between the first layer and the second layer. The third layer comprises electrospun nanofibers. Also provided are filter elements comprising the filter media and bag filters for a heating, ventilation and air conditioning system.

A multi-layer protection element for thermal insulation of a battery, a battery with such a protection element and the use of the protection element to filter gases escaping in case of fire and to prevent the escape of flames and/or sparks are proposed. The highly gas-permeable protection element comprises a carrier layer of a fabric and a compressible fibre layer in the form of a sewn non-woven fabric. The protection element is arranged between at least one battery cell and a housing wall of the battery and covers an outlet of the housing wall on the inside. This enables good pressure compensation in the event of fire and/or a short circuit, wherein escaping gases are filtered in particular through the fibre layer and the escape of flames or sparks through the outlet is prevented.

An acoustic insulation web of fibrous material includes: a nonwoven batting including: a first layer including a first plurality of low-melt binder fibers forming a first predetermined percentage of the first layer; and a second layer bonded with the first layer and including a second plurality of low-melt binder fibers forming a second predetermined percentage of the second layer, the first predetermined percentage being greater than the second predetermined percentage such that the first layer is denser than the second layer.