Improvements in or relating to fire barriers

    公开(公告)号:GB1026849A

    公开(公告)日:1966-04-20

    申请号:GB596863

    申请日:1963-02-14

    Applicant: BASF AG

    Abstract: Fireproof screens of the "venetian blind" type comprise a plurality of slats composed of an alkali metal silicate containing water and fibres, the slats being joined to each other by thermally stable connecting means and being adapted in the event of fire to move from an inoperative position in which the slats are substantially one behind another into an operative position in which they are spread out so that they only partly overlap one another. They may be held in the inoperative position by a cord of readily fusible material, e.g. a plastic cord, or by a fusible catch. The slats may be provided with mechanically, stable reinforcement, e.g. of wood or metal, and may be provided with a covering to protect them from atmospheric moisture and CO2, e.g. a covering of paper lined with aluminium foil. The specified slat material is an alkali metal silicate having a molar ratio of alkali metal oxide to SiO2 of 1:2 to 1:4 (preferably 1:25 to 1:3. 5) and containing from 20 to 70% (more preferably 40 to 60%) by weight of water and 10-40% (preferably 15 to 25%) by weight of synthetic silicate fibres.

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