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Effect of fire retardants on internal bond strength and bond durability of structural fiberboard

机译：阻燃剂对结构纤维板内部粘结强度和粘结耐久性的影响

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摘要

This study evaluated the effect of a number of chemicals on the internal bond (IB) strength and bond durability of phenolic-bonded structural fiberboard (medium density fiberboard) panels. Borax (BX), boric acid (BA), monoammonium phosphate (MAP), diammonium phosphate (DAP), and phosphoric acid (PA) were sprayed onto the fibers made from 50% pine (Pinus nigra Arnold var. pallasiana) and 50% beech (Fagus orientalis Lipsky) woods at 2%, 4%, and 6% retention levels based on oven-dry fiber weight. The panels were tested for unaged IB strength (dry), and IB strength (aged), after cyclic-accelerated aging, according to the procedures defined by European Norm (DIN EN) 321 (1999). Unaged IB and aged IB values of all the treated specimens at three retention levels were significantly decreased when compared to untreated control values. The IB strength and bond durability of all the treated panels decreased with increasing chemical content. BX-treated specimens had the best IB strength and bond durability, followed by DAP-, MAP-, BA-, and PA-treated specimens, respectively.
机译：这项研究评估了多种化学物质对酚醛粘合结构纤维板（中密度纤维板）面板的内部粘合（IB）强度和粘合耐久性的影响。将硼砂（BX），硼酸（BA），磷酸一铵（MAP），磷酸二铵（DAP）和磷酸（PA）喷涂到由50％松木（Pinus nigra Arnold var。pallasiana）和50％松木制成的纤维上榉木（Fagus Orientalis Lipsky）木材的保留量为2％，4％和6％（基于烤箱干纤维重量）。根据欧洲规范（DIN EN）321（1999）定义的程序，在循环加速老化后，对面板进行未老化的IB强度（干）和IB强度（老化）的测试。与未处理的对照值相比，所有处理过的样品在三个保留水平下的未老化IB和老化IB值均显着降低。随着化学含量的增加，所有处理过的板材的IB强度和粘结耐久性均下降。 BX处理的样品具有最佳的IB强度和粘结耐久性，其次分别是DAP-，MAP-，BA-和PA处理的样品。

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