A fibrous ceramic mat is molded from a slurry of ceramic fibers and/or ceramic micropartides and/or a metal. The mat is impregnated with a sol prior to drying. A catalyst for the sol is introduced into the mat to cause the sol to gel. The sol-gel binder forms bonds so that the mat is dimensionally stabilized. The mat is dried to produce the desired ceramic insulation that has preferably a consistent microstructure and a fully gelled sol-gel binder through its entire thickness. If we use a metal,...

A granular thermal insulating material comprising rice hull ash, ceramic clay binder, rice bran and an exfoliating agent, and methods to produce the insulating material.

Combustion plants and gas turbines have inner regions through which hot gases flow. A thermal insulation for the inner regions includes a fiber composite having a surface. A protection against destruction is disposed at the surface.

Disclosed are fibrous structures comprised of shaped fibers wherein the thickness of the compressed fibrous structure at 1.00 psi is .gtoreq.1.3 times that of a similar compressed structure having the same area density and made from round cross section fibers of the same dpf as the shaped fibers. The invention is useful in articles such as coats, gloves, boats, shoes, etc. made using the structures disclosed herein. The surprising feature of structures according to the present invention is the t...

An insulating batt having two sheets of heat reflective insulating material and connecting means between and connecting sheets together in an overlapping substantially parallel relationship. The connecting means includes a plurality of bracing strips extending between and connected to each of sheets. The bracing strips enable the batt to be adjusted between a collapsed position in which the sheets are closely adjacent, and an operative position in which sheets are mutually spaced. Each bracing s...

The present invention, in certain embodiments discloses an insulation composition including polyvinyl alcohol cooked without an acidic medium and cellulose fibers combined with an acidic medium for spray-on insulation. In certain embodiments cellulose fibers and acidic solids are ground together. In one aspect the acidic medium is solid boric acid. In another aspect liquid boric acid is sprayed onto the fibers Systems are disclosed for introducing the fiber acidic composition into a first hose o...

Thin electrical insulation having a first layer of resin impregnated micaceous paper, superimposed thereon a second layer of spaced flattened glass yarns and superimposed thereon a third layer of polymer film is particularly adapted to the insulation of relatively small conductors and for use at elevated temperatures.

The thermal insulating properties of fibrous thermal insulation are improved for high temperature applications by incorporating graphite flakes in the insulation to substantially reduce radiant heat transfer in fibrous insulation which comprises randomly oriented fibers joined primarily at their nexus by a binder of carbonized starch and graphite flakes oriented in the insulation with the greatest surface area of the flakes being disposed normal to the direction of radiant heat transfer.

An insulating sleeve for use with transmission pipelines that carry liquid natural gas (LNG) at cryogenic temperatures, which insulator includes a tubularly-shaped bonded perlite core that is sealed in an envelope which is filled with a condensible gas such as carbon dioxide (CO.sub.2). When the insulator is positioned near the cold transmission line, the CO.sub.2 condenses thereby substantially evacuating the insulator, thus providing excellent insulation for the pipeline by reducing the heat g...

Capillary insulation for transferring low temperature liquids is provided in which a cellular structure is in the form of a cylinder, and defines a plurality of radially extending discrete cells enclosed by a capillary cover with capillary openings communicating with each cell. The cylindrical capillary insulation may be used as a hose or conduit for the transfer of low temperature liquids or as either external or internal insulation for tubes or pipes. A method of manufacturing the cylindrical ...