By Charles H. Trillich / Co-Founder Packworld USA
Heat sealing technology has evolved over many decades to reduce cost and increase profit with precision heat sealing. This article reflects on these advancements and how to obtain perfect seals every time.
In recent years the methods and means of cutting and/or sealing plastic films and joining plastic components has advanced from an art to a science by the development and introduction of process controls that virtually guarantee perfect bonding every time. The development of this capability has been driven by the demand for plastic packaging materials in critical applications, especially in the life sciences, where validation is required and failure is not acceptable.
The art of heat-sealing plastic materials began more or less concurrently with the development of the thermoplastic materials themselves. Initially, the sealing of materials was accomplished by manual means with simple hot wands or …