Patent ID: 6203646
Filing Date: 2001-03-20
Classification: D04H,Y10T

Abstract:
A method of providing a fibrous thermoplastic netting layer adhered around all surfaces of a mineral fibre base layer and thereby producing a mineral fibre element for use as insulation, said method comprising the steps of(a) providing the mineral fibre base layer consisting essentially of mineral fibres wherein the layer has surfaces consisting of an upper side, a lower side and side edges,(b) providing a melt of thermoplastic polymeric material,(c) discharging the melt of thermoplastic material through nozzles towards said surfaces of the mineral fibre base layer,(d) collecting and cooling the thermoplastic material on each of said surfaces in the form of filaments or fibres or both and thereby forming the fibrous netting layer adhering to each of surfaces of the mineral fibre base layer,wherein the weight of the fibrous netting layer is from 2 to 50 g/m.sup.2 and the adherence of the netting to the mineral fibre base layer consists essentially only of the adhesion of thermoplastic of the netting layer to the mineral fibres of the mineral fibre base layer.