Firma Carl Freudenberg

Friedemann Klaffke

Klaus Heckel

Walter Umann

Volker Schwarz

In a pipe insulating jacket comprising a hollow cylinder made of a soft foamed material and an outer sleeve with abutting edges parallel to the axis of the pipe, the improvement wherein the outer sleeve is formed by a metal foil carrying a heat-softenable coating on its inside, the inside of the metal foil being bonded throughout to the surface of the soft foamed material and in proximity to the abutting edges being welded to itself along its upwardly bent edges. Advantageously the foam is closed-cell crosslinked polyethylene of a bulk density of about 30 kg/m.sup.3, the coating is unfoamed uncrosslinked polyethylene about 30.mu. thick, and the metal foil is an aluminum foil about 18.mu. thick carrying on its outside a foil of heat-softenable polyester about 5 to 20.mu. thick.

Pipe insulating jacket

A flat floor tile or slab, especially for use outdoors, comprising a bottom layer of a closed-cell soft foam having openings geometrically distributed over its area and, bonded thereto, a water-permeable covering layer of resiliently cemented-together granules. Advantageously the tile is provided on its periphery with projections and corresponding recesses, whereby said slab can be interlocked with adjacent slabs. The openings in the tile are formed by slits of about 25 mm arranged in parallel straight lines, slits in each line being spaced about 6 mm apart and adjacent lines being spaced less than about 8 mm from one another, the bottom layer comprising a polyethylene foam of a density of about 90 Kp/m.sup.3 and a thickness of about 10 mm, the covering layer being about 7 mm thick and comprising irregularly structured granules of an average diameter of about 1 to 5 mm and comprising a mixture of mineral particles and rubber particles.

Lay-flat flooring slab

A lightweight exercise and tumbling mat comprises a core composed of a closed-cell foamed synthetic material with soft elastic properties. A textile sheet and/or film is disposed on the top surface of the core and a nonskid sheeting of rubber or synthetic material is disposed on the underside of the core.

Tumbling and exercise mat

A tarpaulin with thermal insulation for a swimming pool, comprising a closed-cellularly foamed, elastic plastic foil with flotation features, wherein the top side thereof is lined with a porous material and the reverse side with an impenetrable, flexible surface structure having a relief-like surface.

Swimming pool tarpaulin

A thermal insulating and flotational interlining material comprising a tricot fabric flame laminated to a closed-pore cross-linked polyolefin foam provided with staggered slits so as to be extensible with the tricot. The slits may be about 1 to 10 mm long spaced longitudinally in rows by about an equal amount, rows being spaced about 1 to 5 mm from one another.

Growing community of inventors

Gorxheimertal, Germany

Friedemann Klaffke