天丝纤维在变压器绝缘纸板中的应用

Application of Tencel Fibers in Insulating Pressboard of Power Transformer

中文关键词:  天丝纤维  针叶木浆  绝缘纸板  电力变压器

Key Words:Tencel fiber  kraft softwood pulp  insulating pressboard  power transformer

中文摘要:

      天丝纤维是一种溶剂型再生纤维素纤维，研究了天丝纤维原纤化程度及其对浆料性能的影响，探讨了天丝纤维与针叶木浆配抄对变压器绝缘纸板机械性能和电气性能的影响。研究结果表明，天丝纤维容易原纤化，原纤化程度越高，纤维变得更加柔软和扭曲，表面更加粗糙，分丝帚化越多；相对100%针叶木浆抄造的绝缘纸板，针叶木浆与天丝纤维配比为85∶15配抄的绝缘纸板的紧度降低4.8%，抗张指数下降2.9%，吸油率提高11.9%，在空气中的击穿电压提高5.8%，在油中的击穿电压提高25.8%，天丝纤维显著提高了绝缘纸板的吸油率和电气强度。

Abstract:

      Tencel fiber is a kind of solvent type regenerated cellulose fiber. The fibrillated Tencel fiber and its influence on the performance of the slurry were studied in this paper, and the influences of different Tencel fiber ratio on the mechanical and electric performances of transformer pressboard were also investigated. The results showed that the Tencel fiber was easy to fibrillate, the higher the fibrillation degree, the fiber became more soft and twisted, more rough surface. Comparing with the insulating pressboard produced with 100% softwood kraft pulp, the density of the insulating pressboard produced with softwood kraft pulp and Tencel fiber in 85∶15 ratio was decreased by 4.8%, the tensile index decreased slightly by 2.9%, oil absorption rate increased by 11.9%, the breakdown voltage in the air and in the oil increased by 5.8% and 25.8%, respectively. The Tencel fiber can improve the oil absorption rate and electrical strength when the Tencel fibers was used in the insulating pressboard of power thansformer.