| 摘要 |
<p>A core material is based on a fibrous web containing foam-structure formed of irregularly distributed members within or upon the web and separated by channels that are permeable to resin. An independent claim is also included for a process for producing the core material comprising introducing a foamed or foam generating material into a fibrous web using binder material(s) and setting a foam on the web by curing the binder material.</p> |
