Heat-seal bands
Most believe that impulse heat sealing is limited to straight seams, which is simply not the case. In fact special shapes can be created to meet your unique sealing needs. You can design and develop almost any configuration for sealing plastic films and thin thermoplastic parts. Complex shapes with multiple-power feed tabs for equal heat […]
Heat sealing band underlay
Underlays and Silicone Backups for RESISTRON® Impulse Sealing Systems In RESISTRON® impulse sealing systems, the underlay and the opposing sealing bar facing are critical functional components of the sealing process. Both are selected and adapted to the specific application and sealing bar design to ensure stable, repeatable, and precisely controlled sealing conditions. Underlays for Sealing […]
Non-stick PTFE Tape
Tape PTFE/Kapton PTFE-tape This versatile material is used in many ways in heatsealing set-ups. It is sometimes used beneath the heatseal band on the heatseal jaw face. When 3 mil Cover Strip (See Anti-Stick Provisionsis) is used, it has the advantage of providing marginally adequate electrical insulation and little thermal insulation. This is good when […]
Impulse Transformer
Selecting the right impulse transformer Choosing the correct impulse transformer is more than a power calculation.It requires understanding the complete sealing process and the conditions under which the system operates. Why system conditions matter The required transformer size and configuration depend on several interacting factors.Ambient temperature, cooling conditions and maximum sealing temperature all influence how […]
CIRUS
Cirus – Cermet Integrated Resistive Ultrafast Sensorless heaters Heatsealing tools are the outcome of an ongoing development pro-cess at ROPEX GmbH lasting many years. Extensive experience embracing more than 25 years as a leading supplier of systems to control the temperature of heatsealing bands laid the foundation for this new technology. (Patent Nos. 197 37 […]
RESISTRON
How RESISTRON Works The Sealing Band as a Temperature Sensor At the beginning of each sealing cycle, the sealing band is cold.RESISTRON measures the electrical resistance of the band before heating starts. Because the resistance of the band material increases in a predictable manner with temperature, the sealing band itself acts as an integrated temperature […]
Heat seal testing
Heat seal testing Heat seal testing is carried out to verify and optimise sealing processes under production-relevant and controlled conditions. Materials are evaluated using controlled and repeatable test setups, enabling precise analysis of how they respond to temperature, pressure, time and cooling. Testing goes beyond theoretical calculations. By working directly with the material in practice, […]
The Best Way to Define Correct Sealing Parameters
To achieve a stable, repeatable, and high-quality impulse sealing process, both technical calculation and practical validation are required. This is why the combination of a technical questionnaire and sealing tests provides the most reliable results. What the Questionnaire Provides The questionnaire collects all relevant technical data about the application, such as: Sealing band type, geometry, […]
Sealing Principle with Different Bands
Selecting the correct heat sealing band is essential for achieving stable, efficient and repeatable impulse sealing.The sealing band defines how heat is stored, transferred and released into the material and therefore directly influences seal quality, cycle time and production rate. Correct band selection ensures: Reliable seal strength Short and controllable heating cycles Efficient cooling Stable […]
Constant Heat-Sealing
Constant Heat Sealing Constant heat sealing is a sealing method where the sealing bars are kept hot all the time. When the machine is running, the bars stay at a fixed temperature.Sealing is made when the bars close and apply heat, pressure, and time to the packaging material. Because the bars are always hot, heating […]