Center and its production manner null which for the lamination safety glass possess the exhausting and lamination property which

摘要

(57) has a peripheral sealing characteristics and tacking and excellent degassing superior properties at high temperatures, [summary] The present invention relates to a thermoplastic intermediate layer of laminated safety glass for. On the other, the sheet material has a surface pattern characterized by a flat surface having grooves non-blocking substantially for the air flow in the direction intersecting at least two of its surfaces. Groove allows for rapid degassing, rising AR _p / AR _t ratio roughness parameters area in the range of 0.52 to 0.62, and the area of less than 2.5 and AR _t is less than 32μm at the same time, The complete peripheral seal after deaeration, and allow ease of temporary fixing of the intermediate layer on glass. By superimposing on the pattern produced by other means or melt fracture on at least one surface, promotes degassing, the surface pattern of the may assist a peripheral seal.