| 摘要 |
<p>A honeycomb core or honeycomb structure 1 comprises a two-dimensional arrangement of hollow cylindrical cells individually separated by cell walls made of constructive sheets 4. Each constructive sheet comprises a mixture complex of para-aramid fibers 2 and meta-aramid pulp material. The para-aramid fibers 2 occupy a weight percentage not less than 20% and less than 50% of the entirety. The honeycomb core is made by either the expanding method comprising the steps of stacking a plurality of such constructive sheets 4, applying stripes of adhesive and then extending the stack or by the corrugating method comprising the steps of corrugating respective constructive sheets, stacking and bonding the corrugated sheets. If desired, after-treatment for reinforcement may be executed to apply or impregnating phenolic resin or other impregnating agent. <IMAGE></p> |
