Electromagnetically welded composite and the preparation thereof
US6352779B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2000 |
| Grant date | Mar 5, 2002 |
| Priority date | — |
| Expiry date | Nov 14, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31507
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention is an article comprising a fiber-reinforced engineering thermoplastic polyurethane composite welded to a thermoplastic part by way of an interlayer containing a dispersion of a ferromagnetic material and a method for preparing the same. Alternatively, the composite or the thermoplastic part or both may contain the ferromagnetic material. A tight bond is created by subjecting the ferromagnetic material to a radio-frequency magnetic field to generate heat, which locally melts composite and the thermoplastic part, then allowing the subjected areas to cool. The invention is particular useful for the preparation of window frames.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.