One or more nanofiber yarns can be placed in contact with one or more nanofiber sheets. The nanofiber yarns, which include single-ply and multi-ply nanofiber yarns, provide added mechanical stability to a nanofiber sheet that decreases the likelihood of a nanofiber sheet wrinkling, folding, or otherwise becoming stuck to itself. Furthermore, the nanofiber yarns integrated with the nanofiber sheet can also act as a mechanism to prevent the propagation of tears through the nanofiber sheet. In some cases, an infiltrating material can be infiltrated into interstitial spaces defined by the nanofibers within both the nanofiber yarns and the nanofiber sheets. The infiltrating material can then form a continuous network throughout the nanofiber yarns and the nanofiber sheet.

One or more nanofiber yarns can be placed in contact with one or more nanofiber sheets. The nanofiber yarns, which include single-ply and multi-ply nanofiber yarns, provide added mechanical stability to a nanofiber sheet that decreases the likelihood of a nanofiber sheet wrinkling, folding, or otherwise becoming stuck to itself. Furthermore, the nanofiber yarns integrated with the nanofiber sheet can also act as a mechanism to prevent the propagation of tears through the nanofiber sheet. In some cases, an infiltrating material can be infiltrated into interstitial spaces defined by the nanofibers within both the nanofiber yarns and the nanofiber sheets. The infiltrating material can then form a continuous network throughout the nanofiber yarns and the nanofiber sheet.

A thermally bonded filtration media that can be used in high temperature conditions in the absence of any loss of fiber through thermal effects or mechanical impact on the fiber components is disclosed. The filter media can be manufactured and used in a filter unit or structure, can be placed in a stream of removable fluid, and can remove a particulate load from the mobile stream at an increased temperature range. The combination of bi-component fiber, other filter media fiber, and other filtration additives provides an improved filtration media having unique properties in high temperature, high performance applications.

A thermally bonded filtration media that can be used in high temperature conditions in the absence of any loss of fiber through thermal effects or mechanical impact on the fiber components is disclosed. The filter media can be manufactured and used in a filter unit or structure, can be placed in a stream of removable fluid, and can remove a particulate load from the mobile stream at an increased temperature range. The combination of bi-component fiber, other filter media fiber, and other filtration additives provides an improved filtration media having unique properties in high temperature, high performance applications.

Methods for forming a hydroentangled scrim sheet are provided. The method can include hydroentangling a scrim sheet having a first layer of staple fibers on a first side of the scrim sheet and a second layer of staple fibers on a second side of the scrim sheet to form a hydroentangled scrim sheet; calendaring the hydroentangled scrim sheet to form a calendared hydroentangled scrim sheet; impregnating the hydroentangled scrim sheet with a saturant composition; drying the saturant composition impregnated into the calendared hydroentangled scrim sheet; applying a bond coat onto a surface of the calendared hydroentangled scrim sheet; and applying a top coat onto the bond coat. The top coat is, in one embodiment, configured to provide a surface for further coatings thereon.

Methods for forming a hydroentangled scrim sheet are provided. The method can include hydroentangling a scrim sheet having a first layer of staple fibers on a first side of the scrim sheet and a second layer of staple fibers on a second side of the scrim sheet to form a hydroentangled scrim sheet; calendaring the hydroentangled scrim sheet to form a calendared hydroentangled scrim sheet; impregnating the hydroentangled scrim sheet with a saturant composition; drying the saturant composition impregnated into the calendared hydroentangled scrim sheet; applying a bond coat onto a surface of the calendared hydroentangled scrim sheet; and applying a top coat onto the bond coat. The top coat is, in one embodiment, configured to provide a surface for further coatings thereon.

A composite panel with a thermosetting cellular matrix, a method for manufacturing said panel, and a structure for covering a wall that is formed from an assembly of such panels. The structure provides the wall with heat insulation against cryogenic fluids and/or protection against fire or flames and/or sealing against the fluids. A panel having a thermosetting cellular matrix, includes at least one substrate that includes short, non-woven basalt fibers and is impregnated by the matrix. The panel is such that the at least one substrate includes a plurality of non-woven layers stacked to a stacking thickness. The non-woven layers each include the short basalt fibers and are needled through the thickness without using thermoplastic fibers.

A composite panel with a thermosetting cellular matrix, a method for manufacturing said panel, and a structure for covering a wall that is formed from an assembly of such panels. The structure provides the wall with heat insulation against cryogenic fluids and/or protection against fire or flames and/or sealing against the fluids. A panel having a thermosetting cellular matrix, includes at least one substrate that includes short, non-woven basalt fibers and is impregnated by the matrix. The panel is such that the at least one substrate includes a plurality of non-woven layers stacked to a stacking thickness. The non-woven layers each include the short basalt fibers and are needled through the thickness without using thermoplastic fibers.

The invention relates to a thermal insulation product based on mineral wool comprising mineral fibers, the product comprising two main faces and longitudinal and transverse edges perpendicular to the main faces, the product being characterized by the following orientation fractions: a longitudinal orientation fraction greater than or equal to 48%, or even 50%, along an angle of more or less 6? with respect to the plane of the main faces, when the mineral fibers are counted only in a longitudinal cross-section, and a mean orientation fraction greater than or equal to 40%, or even 45%, along an angle of more or less 6? with respect to the plane of the main faces, when the mineral fibers are counted both in a transverse cross-section and in a longitudinal cross-section.

The invention allows the insulating power of a thermal insulation product based on mineral wool to be improved without increasing its thickness.

The invention relates to a thermal insulation product based on mineral wool comprising mineral fibers, the product comprising two main faces and longitudinal and transverse edges perpendicular to the main faces, the product being characterized by the following orientation fractions: a longitudinal orientation fraction greater than or equal to 48%, or even 50%, along an angle of more or less 6? with respect to the plane of the main faces, when the mineral fibers are counted only in a longitudinal cross-section, and a mean orientation fraction greater than or equal to 40%, or even 45%, along an angle of more or less 6? with respect to the plane of the main faces, when the mineral fibers are counted both in a transverse cross-section and in a longitudinal cross-section.

The invention allows the insulating power of a thermal insulation product based on mineral wool to be improved without increasing its thickness.