The Preparation of Aramid Paper and its Properties

Abstract:

The meta-aramid fibrids were prepared by precipitation in this paper. The meta-aramid solution dissolved in the solvent system DMAc/LiCl was injected into the high shearing coagulant at room temperature and the mixture of water and N, N-dimethylacetamide(DMAc) was used as coagulant. The shearing rate, viscosity of the solution and the concentration of water in coagulant were the main factors on effecting the formation of fibrids. The meta-aramid fibrid has a gradual weight loss process when the temperature increases from 100°C to 400°C, lower thermal property of meta-aramid fibrid was due to the hydrogen bonding and crystalline structure were broken during dissolving process, however, a flexible and easy dispersing property of meta-aramid fibrid in fluid is due to its amorphous structure, which are very important that the meta-aramid fibrid has a better binding and adhesive property with the aramid short fiber in aramid paper, then yield a high mechanical and insulation property for aramid paper. Then, the properies of aramid paper were investigated. The results indicated that the proportion of meta-aramid fibrid in the aramid paper and the length of shorten aramid fiber are the main factors for affecting the strength and the other properties of aramid paper.

• Periodical: Advanced Materials Research (Volume 796)
• Pages: 290-293
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.796.290
• Online since: September 2013
• Authors: Li Rong Yao, Wei Tao Zhao, Shan Qing Xu, Qi Long Sun
• Keywords: Aramid Paper, Fibrid, Property

References

[1] S.F. Zhang, M.Y. Zhang and K.C. Li: Polym. Bull. Vol. 66(2010), p.351.

[2] D.W. Kawka and D.W. Anderson, U.S. Patent 0003659 A1 (2006).

[3] L.R. Yao, K.T. Kim amd J.Y. Kim: Fibers and Polymers Vol. 14(2013), p.326.

[4] L.R. Yao, K.T. Kim amd J.Y. Kim: Fibers and Polymers Vol. 13(2012), p.281.