| Abstract: | In packaging, heat-seal seams have been known as ‘peelable seals’ for a long time. In this system seal medium A is sealed with seal medium B. They are combined in such a way that the sealed seam can be reopened by a defined force without destroying the packaging. Typical applications for peelable seals are boxes or containers with sealed cover sheets, blisters and flexible packagings. The tendency towards peelable packagings has increased recently. This research project dealt with the relevant processes and parameters that influence peelable seals and aims to define reproducible, peelable sealed seams and to elaborate upon a method to develop and produce peelable seam systems. Compared with other research programmes or bibliographical data, this project dealt, in particular, with: - i the definition of a ‘reproducible, peelable sealed seam’;
- ii an analysis of peelable seam production using the different sealing techniques (heat-contact, ultrasonic and inductive high-frequency);
- iii the influence of the type of sealer jaw on the production and characteristics of peelable seams.
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