An intumescent seal comprises a first body or mass of intumescent material (3) which provides a hard foam on heating and a second body or mass (4) of intumescent material which produces a soft foam on heating. An intumescent seal comprises at least one body of intumescent material (3) which produces a hard foam on heating and at least one body of intumescent material (4) which produces a soft foam on heating, the intumescent materials (3, 4) being carried by at least one of a pair of members or parts between which gap (24) is defined at least in a predetermined relative position of the two members or parts, the intumescent material being disposed so as to intumesce into the gap (24) on heating at least when the members or parts are in said predetermined position.
The component comprises an elongate structure (1) with an open cross-section and edge stiffening elements (2); to increase the shear stiffness or bulge resistance of the structure (1), its flanges (3) are stiffened in the deformation-critical areas with plates or shells (4) attached to the flanges by means of spacer elements (7-9).
An intumescent seal for doors, door frames or the like is provided which includes a first housing having a first outwardly opening channel formed therein and a second housing adjustably and movably mounted in the first outwardly opening channel of the first housing. The second housing also has an outwardly opening channel formed therein which is substantially filled with an intumescent material. The movable mounting of the second housing allows for resilient movement of the second housing within the first channel to ensure a tight seal.
A recyclable bumper system based on polypropylene comprises a bumper support A of glass fiber reinforced polypropylene, an energy-absorbing foam core B of foamed polypropylene and a tough shell C of EP-rubber modified polypropylene which may be coated, and can be recycled by mechanical comminution, extrusion and granulation, resulting in granules from which injection moldings having good mechanical properties can be produced.
In a door assembly composed of a door frame, a door having a hinge side and a hinge supporting the door on the frame for pivotal movement of the door between an open position and a closed position, the hinge side of the door facing, and being adjacent to, a portion of the frame when the door is in the closed position, the door is provided with a recess in the hinge side; and the assembly is further provided with at least one projecting element secured to the frame portion to project into the recess when the door is in the closed position and having a mass of thermally intumescent material which is expandable for securing the projecting element to the door upon being heated above a predetermined temperature.
The panel assembly has a panel generally fitting in a hole and having an outer periphery running generally parallel to the inner periphery of the hole. Respective geometrically similar inner and outer annular frames on the inner and outer peripheries have confronting outer faces forming an annular gap around the panel between the inner and outer frames. One of the frames has an inner face forming an annular compartment extending around the respective periphery. This one frame is formed with an array of throughgoing openings extending between the respective inner and outer faces and the compartment is substantially closed except at the openings. An annular body of heat-swellable material is provided in the compartment so that on heating of the material it swells and exits the compartments through the openings to fill the gap.
