论文部分内容阅读
研究了棉浆打浆方式、棉浆与聚乙烯醇(PVA)纤维配比以及聚丙烯酰胺种类和用量对证券纸耐折性能的影响。结果表明,Valley打浆机和PFI磨两种方式混合打浆所抄证券纸的耐折度好于单独使用Valley打浆机时的,Valley打浆机打浆至34°SR后再进行PFI磨打浆,证券纸的耐折度分别在打浆度49°SR和67°SR时出现峰值,为8794次和10981次。棉浆与70℃开始熔化的PVA纤维配抄,当PVA纤维用量为30%时,与未添加PVA纤维相比,证券纸的耐折度提高了约7%。添加不同种类聚丙烯酰胺,发现阴离子聚丙烯酰胺(APAM)在提高耐折性能方面效果显著,在其用置为0.4%时,与未添加APAM的相比,纸张的耐折度提高了28%。
The effects of the beating mode of cotton pulp, the ratio of cotton pulp to polyvinyl alcohol (PVA) fiber and the type and amount of polyacrylamide on the folding endurance of security paper were studied. The results show that Valley beater and PFI mill are two ways to mix beating paper, the folding endurance is better than when using Valley beater alone, Valley beater beating to 34 ° SR before PFI beating, The folding endurance peaked at beating degree of 49 ° SR and 67 ° SR respectively, 8794 times and 10981 times. The cotton pulp and the PVA fiber melted at 70 ° C were dispensed. When the amount of PVA fiber was 30%, the folding endurance of the bond paper increased by about 7% compared with that without PVA fiber. Adding different kinds of polyacrylamide, it was found that anionic polyacrylamide (APAM) was effective in improving the folding endurance performance. When it was set to 0.4%, the folding endurance of paper was increased by 28% compared with that without APAM. .