Aggregates of mineral fibers and thermoplastic materials useful particularly as underlayers for structural sheathings for acoustic insulation

摘要: The production of structural sheathings or facings having an underlayer affixed thereto, to serve as acoustical insulating member, said being formed by the combination mineral fibers, particularly glass fibers relatively long length in interlaced condition, which is permeated with thermoplastic compositions comprising mixtures one more elastomers such natural artificial latex, and adjuvants for promoting a chemical bond between elastomer component. This prepared forming mat deposition successive layers, followed thorough impregnation aqueous dispersion composition, withdrawal excess latter from impregnated mat, drying final heating thereof attain effective reticulation plastic composition amongst before accumulated on storage roller. step gluing underlayers sheathing other support rendered secure satisfactory partially completely clogging pores at both faces special filling layer glue applied thereto. Furthermore, appearance its improved, especially when vinyl plastic, removing folds therefrom are caused rolling up former reel course preparation. elimination these attained immediately prior fixing relieve slightly binding layers material, gives rise re-arrangement stratification adjacent surfaces underlayer.