%      http://www.biwako.shiga-u.ac.jp/sensei/kumazawa/tex/hhline.html
%      を参考にすると，

\documentclass[a4paper]{jsarticle}
\usepackage{longtable}
\usepackage[arydshln]{emathT}

\newlength\savedwidth
\newcommand\whline{%
    \noalign{\xdef\origarrayrulewidth{\the\arrayrulewidth}%
    \global\arrayrulewidth 3\arrayrulewidth}%
    \hline%
    \noalign{\global\arrayrulewidth\origarrayrulewidth}%
}

\begin{document}

\begin{longtable}{Ic|c;{1pt/1pt}c;{1pt/1pt}c;{1pt/1pt}c;{1pt/1pt}c;{1pt/1pt}c;{1pt/1pt}c;{1pt/1pt}c;{1pt/1pt}cI}
%\begin{longtable}{|c|c|c|c|c|c|c|c|c|c|}
\whline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\hline
aa&bb&cc cc&dd&ee&ff&gg&hh&ii&jj\\\whline
\end{longtable}

\end{document}


とできるでしょうか。
\hlineb がうまく適合していないようです。

▼関連発言
│
└◆8452:arydshlnとemathTパッケージの併用について [yoshi] 11/22 00:34
　└◆8453:Re:arydshlnとemathTパッケージの併用について [石原　守] 11/22 07:35
　　└◆8455:Re[2]:arydshlnとemathTパッケージの併用について [yoshi] 11/22 21:27<-last