Patent FR-2951477-A1 (FR)
Title: Flexible screen for thermal insulation of roof of the buildings, comprises a layered structure with an inner layer of mattress or a non-woven felt of fibers or filaments, and two cladding layers located on either side of the inner layer
Inventor: BINDSCHEDLER PIERRE ETIENNE
IPC: B32B5/26
Filed: 2009-10-15
Abstract: The flexible screen (1) comprises a layered structure with an inner layer (2) of mattress or a non-woven felt of fibers or filaments, and two cladding layers located on either side of the inner layer formed of a component having high mechanical strength and a component permeable to water vapor and impermeable to water. The two cladding layers have identical constitutions, in which the screen has a symmetrical structure with respect to the inner layer. Each outer cladding layer has a multilayer structure, and comprises three components assembled closely together. The flexible screen (1) comprises a layered structure with an inner layer (2) of mattress or a non-woven felt of fibers or filaments, and two cladding layers located on either side of the inner layer formed of a component having high mechanical strength and a component permeable to water vapor and impermeable to water. The two cladding layers have identical constitutions, in which the screen has a symmetrical structure with respect to the inner layer. Each outer cladding layer has a multilayer structure, and comprises three components assembled closely together. The two opposite external components (3) of each outer layer of cladding are made of non-woven sheet. The outer surfaces (4') of visible external components of two cladding layers are provided with a reflective coating such as thin metal deposit in the form of film. The screen is present in the form of a strip of greater length. The two outer cladding layers are continuously connected to each other along the opposite longitudinal edges of the strip by gluing or welding to encapsulate the inner layer. Each cladding layer is constituted of a first non-woven sheet of natural fibers, a breathable film made of polypropylene or polyethylene, and a second non-woven sheet of natural fibers. One of components is constitutive of two coats of exterior cladding extends laterally beyond the corresponding edge of the inner layer to form a lateral covering braid, longitudinally extending along the screen in the form of the strip. Each braid is a side strip extending the various components of the external cladding layer, and comprises, at its face turned towards the inner layer, a longitudinal formation of the strip having sticking or adhesive properties protected by a peelable covering and compatible with the material of the external component providing the visible face of the concerned cladding layer. The first non-woven sheet comprises polypropylene or polyethylene filaments coated with a metallic reflective layer on its face forming the visible side of the screen, and a sheet or a polypropylene or polyethylene continuous film. The three components are mutually assembled together by welding or hot laminating with or without adding sticking material, where the materials constituting three components are identical.