TABLE OF CONTENTS Ticona: Impet
Impet moldings can be joined by ultrasonic, vibration, spin or hot plate welding, depending on the joint geometry and type of application. In hot plate welding, because of the strong tendency of the melt to stick to the hot plate, contactless radiant heating is preferable. For prototype construction, hot gas welding with a welding rod may also be employed.
Reference: Celanex, Impet, Vandar Thermoplastic Polyesters, Supplier design guide, Ticona, 2001.
Eastman Chemical: Eastar
The following guidelines are suggested for obtaining the best ultrasonic welds:
Use parts that are fully packed and have flat, parallel surfaces.
Low weld pressure and high weld time give the strongest welds. Hold time has no significant effect on weld strength.
In a tongue and groove joint design, energy directors, either in the form of a criss-cross pattern or single ridge, give the best results.
Smooth and textured surfaces with no energy director generally result in the weakest welds.
Reference: Moskala EJ, Eiselstein BT, Morrow MC, Free DA: Ultrasonic welding of copolyester resins. ANTEC 2003, Conference proceedings, Society of Plastics Engineers, Nashville, May 2003.
DuPont: Rynite
Because of its high stiffness, this glass-reinforced polyester resin is easy to weld. It is preferable to always use a step joint for such a resin, which is often used in very demanding applications (sometimes even at high temperatures). An over-welding time may generate burned material in the sonotrode area.
Reference: DuPont Engineering Polymers. General Design Principles Module I,...
