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What Membrane Materials Are Used in Inflatable Membrane Structure Buildings?

Date: 2022-04-12 Author: 科琦气膜

  大跨度气膜建筑是以气膜结构为主体的建筑体系。空气膜结构作为一种大跨度建筑结构,采用高强度柔性膜材料,利用气压支撑膜,覆盖大跨度空间。充气膜结构建筑用的是什么膜材料呢?

  其原理是:将膜材料固定在地面基础结构周围,利用送风系统将室内空气压力提高到一定压力,使屋面表面的压差抵抗外力。由于空气压力用于支撑,因此不需要任何梁和柱,因此可以获得更清晰的建筑空间。经过60多年的发展,大跨度充气膜结构已形成一套完整的理论体系和技术规范。对于膜结构中使用的膜材料,膜材料的正确选择应考虑建筑的规划、使用、模式、使用寿命和预算。

  1、 聚氯乙烯薄膜

  1.PVC膜材料在数据和加工方面比PTFE膜便宜,材料柔软,易于施工;但其强度、使用寿命和耐火性均不如聚四氟乙烯膜。

  2.PVC膜材料由聚酯纤维织物和PVC涂层(聚氯乙烯)制成。通常地

  用于建筑的膜材料在PVC涂层材料的表面处理上涂有几微米厚的丙烯酸树脂,以提高防污性能。

  3.然而,几年后,它会变色、变色和变质。根据使用环境,一般PVC膜的使用寿命为5~8年。

  4.为了提高PVC膜材料的耐候性,近年来,已宣布使用氟树脂作为涂层对PVC涂层材料进行表面处理,以提高其耐候性和防污性能。

  2、 聚偏氟乙烯

  1.PVDF是二氟树脂的缩写。

  PVDF树脂涂层对PVC膜表面处理的数据称为PVDF膜。

  2.与普通PVC膜相比,PVDF膜的使用寿命提高到7~10年左右。

  3、 聚四氟乙烯膜

  1.PTFE膜具有高耐久性、耐火性和防污性。为了防止玻璃纤维断裂,需要特殊的工具和施工技能。

  2.耐久性:涂层材料PTFE对酸、碱等化学物质和紫外线非常平静,不易变色或开裂。薄膜材料的颜色通常为白色,透光率高,

  耐用性超过25年。

  3.防污性能:

  由于涂层材料为聚四氟乙烯树脂,表面摩擦系数低,不易污染,也可被雨水冲刷。

  4.耐火性:PTFE膜符合防火材料试验合格的特性。




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