Abstract: A reflective bubble film structure in which at least one low emissivity surface is directly or indirectly attached to the open cell side of a bubble shaped layer resulting in airtight cells. The bubble shaped layer may be made of a plastic film. The plastic film is thermo-formable to a bubble shaped layer and may be heat-sealed directly onto an adjacent low emissivity surface. The plastic film may constitute a single polymer or of a blend of two or more polymers. The plastic film may also be a multi-layer film made of two or more layers. Each layer is constituted of a single polymer or a blend of two or more polymers and may have a different composition in respect to the other layers within the film. The resulting structure thus comprises many individually airtight cells, each one being delimited by a low emissivity surface which thus remains protected from dust and moisture.

Abstract: A monolithic or multi-layer heavy plastic film made of a mineral filled plastic compound is provided for acoustic insulation properties. The heavy plastic compound comprises 40 to 80%, preferably 50 to 70%, mineral filler dispersed in a carrier. The mineral filler has a specific gravity higher than 2.2 g/cm3, preferably higher than 3.5 g/cm3. The mineral filler may be selected among, e.g. CaCO3, TiO2, Sb2O3, BaSO4, etc., preferably BaSO4. The carrier is suitably a soft polymer and may be selected among any polyolefin, preferably based on a polyethylene or a polypropylene resin or any of their respective co-polymers. The monolithic or multi-layer heavy plastic film may be produced by any suitable manufacturing process such as: film-calendering, film-casting, or blown-film extrusion. A bubble shaped structure may be produced using at least one layer of the monolithic or multi-layer heavy plastic film.