石棉纤维打浆性能及对石棉胶板强度的影响  

Beating Characteristics of Asbestos and Its Influence on Tensile Strength of the Asbestos Sheet

作　　者：夏新兴[1,2] 张瑞宁 郑君熹[1,2] 

机构地区：[1]陕西科技大学,陕西咸阳712081 [2]陕西省造纸技术和特种纸开发重点实验室,陕西咸阳712081

出　　处：《中国造纸》2005年第2期20-22,共3页China Pulp & Paper

摘　　要：研究了石棉纤维的湿法打浆性能 ,发现石棉纤维具有高的正电性 ,其Zeta电位随pH值的降低不断升高 ;随着打浆转数增加 ,Zeta电位和电荷密度明显下降 ,石棉纤维开始分丝 ;当打浆转数为 1 50 0r时 ,石棉纤维打浆度达到最大值 ,抄造的石棉胶板的抗张指数最大。Currently two typical methods are used for forming asbestos sheets, one is compressed process, and the other is papermaking process.In papermaking process, asbestos is beaten under wet condition, which is different from the compressed process. The refining performance of asbestos was investigated in this paper. And it was found that asbestos was with very high positive charge.The positive Zeta potential of asbestos increased while pH value dropped, and decreased while refining increased. The electric charge density of asbestos dropped quickly as refining increased.The Suitable refining revolution for asbestos was 1500 r when it was refinned by a PFI mill,the asbestos fibres were defibred effectively, and the fibres were less cut to fragments, and the tensile strength of the asbestos sheets reached maximum under this refining condition.

关 键 词：石棉纤维 打浆 ZETA电位 电荷密度 抗张指数 

分 类 号：TS722[轻工技术与工程—制浆造纸工程]