建筑材料在发展过程中总会有特殊情况出现,而这种情况又是建筑产品最初设计时所没有考虑的。这些特殊情况并不是暴露了建筑产品的缺陷,而是对建筑产品的性能提出了新要求。生产厂商制订TPO防水卷材配方时原本主要针对耐紫外线性能。这些年来,TPO防水卷材的耐紫外线性能得到了大幅度提高。在20世纪90年代早期,TPO防水卷材在氙弧老化试验机中的耐紫外线值为5 000 kJ/m2。而今生 Building materials in the development process there will always be a special case, but this is the first time the design of building products did not consider. These special circumstances do not expose the defects of the building products but place new demands on the performance of the building products. Manufacturers to develop TPO waterproofing membrane formulations originally targeted at UV resistance. Over the years, TPO waterproofing membrane UV resistance has been greatly improved. In the early 1990s, TPO waterproofing sheets had a UV resistance of 5,000 kJ / m2 in a Xenon Arc Weatherometer. And this life