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通过对新收购的杨木片、贮存三个月的杨木片、贮存10个月的杨木片在实验室蒸煮并检测相关指标,发现随着贮存期的延长硬度逐渐下降,粗浆得率逐渐下降,对14立方蒸球切蒸工段生产成本进行平均计算发现随着木片贮存期的延长成本逐渐上升。对不同贮存期的杨木片制浆漂白后的各种消耗及漂白浆的质量数据对比(分别统计20天的平均时数据)发现随着木片贮存期的延长制浆后浆料的生产成本升高,浆料的可洗性下降,可漂性下降,浆料的质量下降。尤其是尘埃度表现较为明显。在实验室内按照相同的浆料配比分别抄片检测耐折度、裂断长发现发现随着木片贮存期的延长配抄纸张的耐折度、裂断长有所下降。在2640八缸长网纸机上生产55g/m2抄本纸时在混合浆的指标基本不变时,不同贮存时期杨木浆用量相同,达到相同质量要求时针叶木浆配比必须随着木片贮存期的延长加大。
Through the newly purchased poplar chips, poplar chips stored for three months, the poplar chips stored for 10 months were cooked in the laboratory and the related indexes were tested. It was found that the hardness decreased gradually with the prolongation of storage period, The average calculation of the production cost of the 14-cubic-steamed and steam-cut section found that the cost gradually increased with the increase of the storage period of the wood chips. Comparison of the various bleached and bleached pulp bleaches with different storage periods showed that the production cost of the pulp increases with the increase of the storage period of the wood chips , The washability of the slurry decreases, the bleachability decreases, the quality of the slurry decreases. In particular, the performance of dust is more obvious. In the laboratory, respectively, according to the same slurry ratio of sheet test sheet folding test, rupture length found that with the extension of the shelf life of copy paper with folding endurance, rupture length decreased. When producing 55g / m2 copy paper on 2640 eight-cylinder long net paper machine, the same amount of poplar pulp at different storage times when the indexes of mixed pulp are basically the same. When the same quality requirements are reached, the proportion of softwood pulp must be the same as the storage time Extend and increase.