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    • 1. 发明申请
    • PATTERNED ROLLED ZINC ALLOY SHEET
    • 图案轧制锌合金板
    • WO2015063274A1
    • 2015-05-07
    • PCT/EP2014/073476
    • 2014-10-31
    • UMICORE BUILDING PRODUCTS FRANCE
    • MANOV, StephanBISSERY, Christophe
    • C22C18/00C22C18/02E04D13/15
    • E04C2/08C22C18/00C22C18/02C22F1/165E04D3/16E04D3/30E04F13/12
    • The present disclosure concerns specially patterned zinc sheets for coverage and protection of building roofs and facades. A recurrent problem linked with the use of zinc sheets in building applications is the development of white rust. As the complete avoidance of white rust is difficult to achieve, additional means to reduce its impact are most welcome. It is now proposed to limit the visibility of white rust by providing a camouflaging pattern on the surface of the zinc. The invention more specifically concerns an un-weathered rolled zinc alloy sheet with at least one patterned face having an optical reflectivity that varies from region to region, characterized in that said regions are of a pseudo- random shape, having characteristic dimensions in the range of 0.1 mm to 10 cm; and in that the optical reflectivity, when measured across the sheet in any arbitrary direction, presents a specular reflectivity RMS deviation of more than 3 GU and/or a diffuse reflectivity RMS deviation of more than 0.2. A laser-aided imprinting process is disclosed to generate suitable camouflage patterns on the zinc.
    • 本公开涉及用于覆盖和保护建筑物屋顶和外墙的特殊图案化的锌片。 与建筑应用中使用锌片相关的一个复杂问题是白锈的发展。 由于完全避免白锈难以实现,因此减少其影响的其他手段是最受欢迎的。 现在提出通过在锌的表面上提供伪装图案来限制白锈的可见性。 本发明更具体地涉及具有至少一个图案面的未风化的轧制锌合金板,其具有在区域之间变化的光学反射率,其特征在于,所述区域是伪随机形状,其特征尺寸在 0.1毫米至10厘米; 并且当在任何任意方向跨纸张测量时,光学反射率呈现超过3GU的镜面反射率RMS偏差和/或大于0.2的漫反射RMS值偏差。 公开了激光辅助印记方法,以在锌上生成合适的伪装图案。