Various fire-retardants (FR) for the pre-treatment of wood flour, for example, ammonium polyphosphate and different formulations based on phosphorus- and nitrogen-compounds, as well as for application during compounding were tested for their effectiveness in injection-molded and extruded composites based on high-density polyethylene and polypropylene. Small-scale tests for flammability of polymeric materials and for determination of the limiting oxygen index were used to characterize the composite materials. Differences pertaining to the applied compounding conditions, i.e., underwater granulation versus air granulation, were determined. The amount of phosphorus leached from FR during underwater granulation was analyzed. Artificial weathering trials were performed and reaction-to-fire performance and color changes of FR-composites were evaluated. Tensile strength properties of the composites and results for cold water immersion tests are also reported. An optimized formulation based on pre-treated wood flour was developed and extruded into façade profiles for the single burning item test according to DIN EN 13823. The test showed that classification C-s3, d0 according to DIN EN 13501-1 can be achieved if pre-treated wood flour is used. The use of untreated wood flour leads to a lower classification (D-s2, d0). Fire performance of extruded façade profiles can be improved by the use of pre-treated wood flour and enables new applications in the building sector.

测试了用于木粉预处理的各种阻燃剂（FR），例如聚磷酸铵和基于磷和氮化合物的不同配方，以及在混合过程中的应用，测试了它们在注塑成型和注塑成型中的有效性。基于高密度聚乙烯和聚丙烯的挤出复合材料。用小规模测试聚合物材料的可燃性和确定极限氧指数来表征复合材料。确定了与所应用的混合条件有关的差异，即水下制粒与空气制粒。分析了水下造粒过程中从FR中浸出的磷量。进行了人工老化试验，并评估了阻燃复合材料的起火反应性能和颜色变化。还报告了复合材料的拉伸强度性能和冷水浸泡测试的结果。根据DIN EN 13823，开发了一种基于预处理木粉的优化配方并将其挤出到立面轮廓中，用于单项燃烧项目测试。该测试表明，如果满足以下条件，则可以达到根据DIN EN 13501-1的C-s3，d0级使用经过预处理的木粉。使用未经处理的木粉会导致较低的分类（D-s2，d0）。可以通过使用预处理的木粉来改善挤压外墙型材的防火性能，并在建筑领域中实现新的应用。根据DIN EN 13823，开发了一种基于预处理木粉的优化配方并将其挤出到立面轮廓中，用于单项燃烧项目测试。该测试表明，如果满足以下条件，则可以达到根据DIN EN 13501-1的C-s3，d0级使用经过预处理的木粉。使用未经处理的木粉会导致较低的分类（D-s2，d0）。可以通过使用预处理的木粉来改善挤压外墙型材的防火性能，并在建筑领域中实现新的应用。根据DIN EN 13823，开发了一种基于预处理木粉的优化配方并将其挤出到立面轮廓中，用于单项燃烧项目测试。该测试表明，如果满足以下条件，则可以达到根据DIN EN 13501-1的C-s3，d0级使用经过预处理的木粉。使用未经处理的木粉会导致较低的分类（D-s2，d0）。可以通过使用预处理的木粉来改善挤压外墙型材的防火性能，并在建筑领域中实现新的应用。