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通过在石棉纤维打浆后加入不同的螯合剂,以减少金属离子对胶乳在石棉纤维上吸附性能的影响,增强阴离子胶乳与纤维的结合。采用抗张强度作为表征石棉纤维与胶乳结合强度的指标。结果表明:柠檬酸钠、乙二胺四乙酸、柠檬酸均可提高石棉胶乳板的强度,同时增加了纸料的打浆度,使纸料滤水困难,而柠檬酸钠对纸料打浆度的增加最少,因此,柠檬酸钠是一种理想的螯合剂,其最佳用量为1.1%。
By adding different chelating agents after asbestos fiber beating to reduce the effect of metal ions on the adsorption performance of latex on asbestos fibers, the combination of anionic latex and fiber is enhanced. Tensile strength is used as an indicator of the bond strength of asbestos fibers to the latex. The results showed that sodium citrate, ethylenediaminetetraacetic acid and citric acid could both increase the strength of the asbestos latex sheet and increase the beating degree of the paper material, which made it difficult to filter the paper material. However, the effect of sodium citrate on the papermaking degree Therefore, sodium citrate is an ideal chelating agent with the best dosage of 1.1%.