Firma Carl Freudenberg

Other

Carl Freudenberg Firma

Werner Schafer

Jorg Hausdorf

Holger Buchwald

Steffen Kosack

Volker Siekermann

Thomas Kuhlmann

Jurgen Knoke

Walter Fottinger

Horst Kober

Peter Hartwig

Kurt Jorder

Rolf Schneider

Dieter Bischoff

Ingrid Schaffert

Hans Hettenbach

Holger Buckwald

Peter Grynaeus

A flame barrier made of nonwoven fabric for use as a component of a planar multilayer structure, especially a vehicle or aircraft passenger seat. The flame barrier contains staple fibers made of phenolic resin, para-aramid, or melamine resin, alone or mixed with 20 to 60 wt % preoxidized polyacrylonitrile staple fibers. The nonwoven fabric barrier also contains 15 to 30 wt % vermiculite, which is distributed through the entire volume of the nonwoven fabric. The flame barrier possesses a mass per unit area of 100 g/m.sup.2 to 210 g/m.sup.2. The method of manufacturing the nonwoven fabric flame barrier makes use of water jet needling.

Flame barrier comprising a nonwoven fabric layer containing phenolic,

A thermostable substrate for flexible circuit boards having excellent flame-resistance, handling, and storage qualities may be produced by treating a substrate of a nonwoven fabric or paper with a flame-resistant, halogen-free polymeric composition. The polymeric composition comprises an aqueous mixture of a copolymerizate of acrylic acid esters and styrene, and an aminoplastic or phenoplastic precondensate to which a mixture of fine-particle red phosphorus and fine-particle ammonium polyphosphate is also added.

Flame-resistant substrate for flexible circuit boards

A cable wrap which swells upon contact with water is made by coating one side of a nonwoven fabric support with a polyvinyl alcohol binding agent and then with a superabsorber powder, drying the coated fabric between contact surfaces, printing a polyacrylate binding agent plaste onto the superabsorber surface, and then drying the coated fabric. Alternatively, the cable wrap can be made by printing a polyacrylate binding agent paste onto a nonwoven fabric support, applying a polyvinyl alcohol binding agent onto the polyacrylate binding agent paste, sprinkling superabsorber powder onto the polyvinyl alcohol binding agent, and drying the coated fabric between contact surfaces.

Method of making a swelling cable wrap

Disclosed is a flame barrier made of a nonwoven fabric of partially graphitized polyacrylonitrile fibers having a weight per unit area of 40 to 100 g/m.sup.2 and a maximum thhickness of 1.8 mm. The nonwoven fabric is bonded with highly energetic water jets. The flame barrier can be used as a component of a planar multi-layer structure.

Flame barrier made of nonwoven fabric

A flame-resistant cover film for flexible circuit boards having excellent flame-resistance, handling, and storage qualities may be produced by treating an insulating film of a nonwoven polymer fabric with a flame-resistant, halogen-free polymeric adhesive. The polymeric adhesive comprises an aqueous mixture of a copolymerizate of acrylic acid esters and styrene, and an aminoplastic or phenoplastic precondensate to which a mixture of fine-particle red phosphorus and fine-particle ammonium polyphosphate is also added.

Flame-resistant cover film for flexible circuit boards

A jacket for a floppy disk consists essentially of a porous nonwoven material both for a writable cover function and a soft, fibrous liner function.

Jacket for floppy disk

A high-temperature-resistant nonwoven fabric comprising synthetic fibers bonded to one another, said fibers comprising at least one polyaryl amide, polyaryl imide, polyaryl ester or polyaryl anhydride, said fibers being resistant to temperatures up to about 350.degree. C and being resistant to prolonged exposure to a temperature of at least 200.degree. C, is produced by bonding a suitable nonwoven web employing a solution containing a swelling agent and/or a bonding agent for the fiber. If a bonding agent is present, it is of substantially the same composition as the fiber and is precipitated or coagulated by treating the impregnated web with a liquid miscible with the solvent of the solution but which is a non-solvent for the bonding agent. The fabric is washed and dried and then preferably calendered at high temperature so that all the polymeric material is crystallized.

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Birkenau, Germany

Werner Schafer