Effect of Formation Nonuniformity on the Mechanical Strength of Aramid Paper

Abstract:

Aramid paper was manufactured using poly (m-phenyleneisophthalamide) (PMIA) fibers and fibrids, and poly(ethylene oxide) (PEO) was used as dispersant to improve the uniformity of fiber distribution. The Paper Perfect Formation Analyzer (PPF) and the BFT-1 type β Formation tester were used to determine the formation of the aramid paper, and the relationship between the formation and the mechanical strength of aramid paper was discussed. Results showed that the tensile strength and tear strength of aramid paper before hot calendering is affected strongly by its grammage standard deviation, but is less affected by its formation nonuniformity as a function of the scale of foramtion, the R² correlation between tensile strength and grammage standard deviation was 0.63, and the R² correlation between tear strength and grammage standard deviation was 0.73. However, the nonuniformity of formation in the range of scale of formation 0.8-22.7mm has great influence on the tensile strength of aramid paper after hot calendering, and the R² correlation between tensile strength and formation nonuniformity in this range of scale of formation was greater than 0.58.

• Periodical: Advanced Materials Research (Volumes 236-238)
• Pages: 1265-1270
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.236-238.1265
• Online since: May 2011
• Authors: Hui Fang Zhao, Mei Yun Zhang
• Keywords: Aramid Paper, Mechanical Strength-Formation Correlation, PPF Formation, Tear Strength, Tensile Strength, β Formation

References

[1] Bhatia, A. Aramid paper with improved dimensional stability. Proceedings of the Electrical/Electronics Insulation Conference, Rosemont, Illinois, USA. (1995), pp.409-410.

[2] Forsten, Herman Hans, Khan, et al. Flame barrier compositions and their use. U.S. Patent 6,312,561.(2001).

[3] Nomoto, Kazuhiko. Aramid honeycombs and a method for producing the same. U.S. Patent 6,544,622. (2003).

[4] Lyne, M.B., and Hazell, R. Formation testing as a mean of monitoring strength uniformity. The Fundamental Properties of Paper Related to its Uses, Transactions of the Cambridge Symposium, ed. BPBIF, Vol.1 (1976), p.75.

[5] Norman, B., and Wahren, D. Mass distribution and sheet properties of paper. The Fundamental Properties of Paper Related to its Uses, Transactions of the Cambridge Symposium,ed. BPBIF, Vol.1 (1976), p.7.

[6] Kajanto, I.M., Komppa, A., and Ritala, R.K. How formation should be measured and characterized. Nordic Pulp and Paper Research Journal, Vol.3 (1986), p.219.

DOI: 10.3183/npprj-1989-04-03-p219-228

[7] BET-1 Operation Manual. ABERTEC Inc.

[8] Micro-Scanner Operation Manual. OpTest Equipment Inc.

[9] Brochure of Paper PerFect Formation Analyzer. OpTest Equipment Inc.

[10] Bernie, J.-Ph. and Douglas, W.J.M. Exploration of the print quality - paper formation relation. Proceedings, Tappi Process & Product Quality Conference, Jacksonville.(1997), p.73.

[11] Bernie, J.-Ph. and Douglas W.J.M. Paper strength-paper formation relations. 84th CPPA Technical Section Annual Conference, Montreal, Canada. (1998), p.330.

[12] Bernie, J.-Ph., Romanetti J.L., and Douglas, W.J.M. Use of components of formation for predicting print quality and physical properties of newsprint. 86th meeting, Pulp & Paper Technical Association of Canada, Montreal, Canada.(2000), p.285.

[13] Gong,Y. and Yang, G.S. Manufacturing and physical properties of all-polyamide composites, J Mater Sci. Vol. 44 (2009), p.4639

[14] Tappi Standard, T494 om-01.

[15] Tappi Standard, T414 om-04.