| 摘要 |
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/cm<SUP>3</SUP>, preferably higher than 3.5 g/cm<SUP>3</SUP>. The mineral filler may be selected among, e.g. CaCO<SUB>3</SUB>, TiO<SUB>2</SUB>, Sb<SUB>2</SUB>O<SUB>3</SUB>, BaSO<SUB>4</SUB>, etc., preferably BaSO<SUB>4. </SUB>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. |
