共查询到18条相似文献,搜索用时 234 毫秒
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分别利用硅酸钠、硅酸钠与淀粉复配进行纸张表面施胶,表面施胶体系中有机硅油用量控制为3%(相对于硅酸钠绝干质量);探讨了施胶量和施胶体系对纸张孔隙率、纸张平均孔径、表面平滑度、Cobb30值和表面接触角的影响;依据毛细管现象公式,探讨及分析了表面施胶纸张的防水机理;利用扫描电镜(SEM)观察分析了表面施胶纸张的表面形貌。结果表明,硅酸钠-淀粉复配体系中,淀粉最佳用量为33%;随着表面施胶体系施胶量的增加,表面施胶纸张的孔隙率和平均孔径均下降;经硅酸钠和硅酸钠-淀粉复配表面施胶后,纸张的表面接触角较原纸大幅提高且硅酸钠-淀粉复配体系对纸张抗水性的改善效果优于硅酸钠。此外,研究还发现,纸张平均孔径的降低、表面接触角的增加及胶层在纸张表面的覆盖是硅酸盐及其复配体系表面施胶纸张产生抗水性的主要原因。 相似文献
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研究了阴离子松香胶-聚合氯化铝体系对再生浆纸页的施胶效果,主要考察了阴离子分散松香胶、聚合氯化铝和阳离子淀粉等用量对所抄纸张性能的影响。得出以下结论:纸张的吸收性随阴离子分散松香胶用量的增加呈单一下降趋势,随PAC和CS用量表现为先降后升的趋势,原因在于PAC和CS用量过多时,它们的正电荷对胶料留着产生排斥作用,降低施胶效果。纸张撕裂指数随着施胶效果的提升,表现为先上升后趋于平衡。而抗张指数随施胶呈现复杂的变化关系,原因在于浆内施胶影响到了纤维的结合强度。 相似文献
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对市场上有代表性的苯丙及聚氨酯类合成表面施胶剂的理化性能进行了分析,并研究了表面施胶浓度、施胶量、纸张抗水性能之间的相互作用关系。结果表明,苯丙及聚氨酯类表面施胶剂在离子性和电荷密度方面差异很大;高的原纸吸收性和较低的施胶液浓度可以有效提高表面施胶淀粉用量,降低生产成本,但会导致胶料成膜性差,抗水性能下降;通过合理优化表面施胶工艺,苯丙表面施胶剂和聚氨酯表面施胶剂均可赋予纸张良好的抗水性,且在文化用纸中采用表面施胶完全取代浆内施胶是可行的。 相似文献
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松香改性聚酰胺环氧氯丙烷树脂制备及对表面施胶性能的影响 总被引:1,自引:0,他引:1
探讨了松香改性聚酰胺环氧氯丙烷树脂的制备及其对纸张表面施胶性能的影响,并利用红外图谱和DSC对其结构进行了表征。结果表明,松香酰氯与聚酰胺分子链中的仲胺基反应形成酰胺基并结合在聚酰胺分子链上,再通过环氧氯丙烷与聚酰胺反应得到松香改性聚酰胺环氧氯丙烷树脂。表面施胶实验结果表明,松香改性聚酰胺环氧氯丙烷树脂具有理想的表面施胶性能,可赋予纸张表面良好的抗水性和一定的表面强度,表面施胶时纸张的抗水性和抗张强度与松香改性聚酰胺环氧氯丙烷树脂中松香基团的含量有关,其施胶纸张的抗张强度和抗油性随改性树脂中松香基团引入量的增加而降低,而抗水性大幅提高,平滑度和表面强度呈先增后减的趋势。 相似文献
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Biolatex, a new type of paper coating adhesive that has been developed in recent years, has mainly been used in pre-coating and middle coating, due to its advantages of decreasing the associated cost and pollution by partly replacing petro-latex. In this paper, application of biolatex as a surface sizing agent and effects of various factors, such as titanium dioxide addition, on the properties of the sized paper were compared. The results showed that, addition of titanium dioxide to biolatex could improve the whiteness, internal bond strength, and ink absorption. Furthermore, application of the No.4 biolatex resulted in better surface strength, bond strength, and ink absorption of the sized paper than application of polyvinyl alcohol. 相似文献
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在无光泽涂布纸涂料中用滑石粉代替部分高岭土和GCC,无光泽涂布纸的透气度、光泽度、油墨湿排斥、油墨干燥性下降,但是表面强度、印刷对比度和油墨耐摩擦性得到明显提高。粒度较小的滑石粉导致更佳的平滑度、光泽度、透气度、油墨干燥性以及耐摩擦性,但也导致更低的表面强度和印刷对比度。使用涂布滑石粉能较好地解决无光泽涂布纸生产过程中为降低光泽度而大量使用微细GCC却导致印刷对比度和油墨耐摩擦性过低的问题。 相似文献
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与浆内施胶相比,表面施胶不仅赋予纸和纸板良好的抗懑陆能和适印性能,提高纸的物理强度和减小纸的两面性和变形,从而提高纸机的运行性能,而且减少了白水中的化学药品,改善了湿部的沉积,进而延长压榨毛毯的使用寿命,本文结合具体的改造项目,详述了5580/800浸泡式表面施胶机的结构特点、技术特征和应用。 相似文献
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AbstractNano silica was extracted from rice husk and applied on eri silk fabric to impart water repellency. The efficiency of the water repellency was evaluated with water contact angle, water absorbency and spray test methods. In order to enhance the water repellent properties, a silicone-based polymer was also applied. The effect of nano silica coating on the physico-mechanical properties of the eri silk fabric was studied using standard methods. SEM, FTIR and EDX techniques were used for the confirmation of presence of nano silica on silk fabric. The results inferred the nano silica imparted hydropholic property to eri silk fabric, which was further enhanced to superhydrophobic by the incorporation of silica polymer. The nano silica coating slightly enhanced the whiteness and brightness of eri silk fabric. Other mechanical parameters like bending rigidity and crease recovery angle were found to be intact. The higher concentration of nano silica caused a slight reduction in fabric tensile strength. 相似文献