| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.39 ( October 1998 ) Electrical Steel ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Sound Absorption and Mechanical Propertiesof
Porous Stampable Sheet Masami Fujimaki, Katsuhiko Nagayama, Yoshihiko Sato |
| Synopsis: It was found that the sound absorption and mechanical characteristics of porous mold could be controlled by the selection of moderate glass fiber (GF) content, sheet density and sheet thickness. With an increase in polypropylene (PP) content, the compressive strength was enhanced, however, at a high PP content, voids were filled with PP and the sound absorption characteristics deteriorated. The sound absorption characteristics of the porous mold were correlated well with the specific flow resistance and were maximized when the specific flow resistance was set at the range of 350 to 500 Pa Es/m. If the GF content, the density and the thickness are suitably selected, the porous mold shows good sound absorption characteristics, comparable to those of glass wool boards, as well as good mechanical properties, exceeding those of glass wool boards. |
| TextiPDF: 7P/350kbj |