Process for incipient or complete melting of polyester-comprising shaped structures by high frequency welding and use of such polyesters

US5804025A · kind A · utility

Assignee

• Hoechst Trevira GmbH & Co. KG · DE

Inventors

• Dieter Disselbeck · Bad Soden, DE
• Hans-Joachim Bruning · Augsburg, DE
• Bernhard Jahn · Obermeitingen, DE
• Klaus Bender · Wehringen, DE

Key dates

• Filing date: Mar 14, 1997
• Grant date: Sep 8, 1998
• Expiry date: Mar 14, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2367/03
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The use is disclosed of modified polyesters, for example isophthalic acid modified polyethylene terephthalate in high frequency welding. The process is useful for incipient or complete melting of shaped structures, especially sheets, films, coats, hollow articles, injection-molded articles, yarns and textile sheet materials comprising such yarns , composed of such polyesters. The process can be carried out with customary high frequency welding equipment.