| 摘要 |
<p>Coextrusion process for producing a multi-wall sheet comprises feeding part of the core material directly into and via the male insert of the extrusion die to produce a gussetless sheet. An independent claim is also included for a die for making a multi-walled sheet, attributed by a boring(s) in the male insert of the die directly providing the male insert of the die, with a part of the core material right in the middle of the die.</p> |
