Process for manufacturing composite bodies made of plastics

US6165300A · kind A · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Peter Elsner · Remchingen, DE
• Adam Geissler · Karlsdorf-Neuthard, DE
• Rudolf Emmerich · Bruchsal, DE
• Michael J. Zurn · Fergus Falls, US
• Peter Eyerer · Karlsruhe, DE
• Lars Ziegler · Leonberg, DE
• Maik Ziegler · Tiefenbronn, DE

Key dates

• Filing date: Jan 28, 1999
• Grant date: Dec 26, 2000
• Expiry date: Jan 28, 2019

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2105/04
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

In order to manufacture compound composite bodies having at least two lay with a support material made completely or substantially from a polymer and with a porous layer firmly connected thereto, a substantially microwave-permeable polymer is utilized for the support material and a polymer having microwave absorbing properties is utilized for the porous layer. The polymer for the porous layer, treated with foaming agent, is heated with microwave energy up to the decomposition temperature of the foaming agent. The resulting polymer foam is sufficiently heated using microwave energy that the support material, at its bordering layer adjacent the foamed polymer, is sufficiently melted substantially due to heat conduction out of the foamed layer that, subsequent to cooling, a firm composite between the support material and the foamed polymer is effected. The porous layer can also consist essentially of polymer particles which melt together during the MW-irradiation and which are either pre-expanded or expanded during MW-irradiation through foaming agent additive.