A roller-shutter door system comprises a pair of opposed substantially parallel guide rails and a door formed by longitudinally hinged door slats coupled to a retraction roller. The door can be opened and closed with rotation of the retraction roller, and longitudinal ends of the door slats ride within door guide channels in the guide rails. Exterior side seals may cover a gap between the door slats and the door guide channels, and wear shields may be interposed between coated exterior surfaces of the door slats and the side seals so that the side seals bear on the wear shields instead of the coated exterior surfaces. The guide rails may have equipment channels on interior sides thereof, and radius guides may be releasably received in open superior ends of the equipment channels. The radius guides have outwardly facing guide surfaces to guide the door slats toward the retraction roller.

The construction of rapid opening thermally insulated roller doors is challenging in that there are both structural and operational challenges. The door blades need to have structural strength, and also need to have dimensional stability. Disclosed is a thermally insulated roller door blade in which at least the material forming the outer surface is able to resist the tensile loads during retraction, and the blade is provided with flexible spacer strips that help the primary insulating material of the door blade to maintain dimensional stability, primarily by helping to resist crushing. This allows softer materials to be used for thermal insulation than previously used, helping to reduce weight and to improve thermal efficiency, while at the same time allowing smooth and repeatable operation even when exposed to freezing temperatures for long periods.

A door, in particular a rolling door, comprising a door leaf that can be moved along a track including a deflecting portion between an open position, in which it at least partially exposes a wall opening, and a closed position, in which it at least partially closes the wall opening, which includes at least one bending region that is deformable during the door leaf movement along the deflecting portion and is made of a flexible base material such as polycarbonate, wherein a functional film is laminated onto at least one part of at least one bounding surface of at least one bending region.

A roller-shutter door system comprises a pair of opposed substantially parallel guide rails and a door formed by longitudinally hinged door slats coupled to a retraction roller. The door can be opened and closed with rotation of the retraction roller, and longitudinal ends of the door slats ride within door guide channels in the guide rails. Exterior side seals may cover a gap between the door slats and the door guide channels, and wear shields may be interposed between coated exterior surfaces of the door slats and the side seals so that the side seals bear on the wear shields instead of the coated exterior surfaces. The guide rails may have equipment channels on interior sides thereof, and radius guides may be releasably received in open superior ends of the equipment channels. The radius guides have outwardly facing guide surfaces to guide the door slats toward the retraction roller.

A door, in particular a rolling door, comprising a door leaf that can be moved along a track including a deflecting portion between an open position, in which it at least partially exposes a wall opening, and a closed position, in which it at least partially closes the wall opening, which includes at least one bending region that is deformable during the door leaf movement along the deflecting portion and is made of a flexible base material such as polycarbonate, wherein a functional film is laminated onto at least one part of at least one bounding surface of at least one bending region.