| 摘要 |
1276683 Reinforced foamed articles FARBENFABRIKEN BAYER AG 11 Sept 1969 [18 Oct 1968] 44833/69 Heading B5A [Also in Division D1] A foam plastics product is produced by foaming plastics through an insert formed by one or more stretched continuous filaments which have been fixed at their cross-over points by a binder. Shaped bodies may be formed by depositing binder-coated filaments in a mould prior to foaming. Local variations in the insert density may be provided by variation in the fibre of the filaments supplied, by applying a partial vacuum to the mould or by pressure by embossed plates. The filaments may be of metal, carbon, glass, polyamide, acrylonitrile, acetyl cellulose or polyester. Foaming systems may be based on polystyrene, P.V.C., unsaturated polyester resins, epoxy, phenol formaldehyde resins, polyurethanes and natural or synthetic rubber lattices. Shorter fibres plus complete reinforcements may be incorporated in the insert. |
