What is an ONPUL Impulse Sealer?

Established engineers, lab techs, manufacturers or production managers are likely to be familiar with the concept of impulse sealers. Just in case you are new to this type of sealing system, here is a brief description of how the concept works and what the advantages of these sealing systems are.

Impulse sealers heat-seal packages of varying shapes, sizes and descriptions using thermal conductivity.

Controlled by highly advanced microprocessors, a high current is sent on impulse to the heater ribbon, which is located on the heating element’s surface.

On placing the section requiring sealing between the heating elements and pressing, the heater ribbon receives the current – and subsequently heat – and thermally fuses the section. The current then stops and the seal is kept under pressure until cooled. This allows the finish of the seal to remain clean, a matter that is often a problem with constant heat sealers, where the loss of pressure can lead to untidy, weakened seals.

This process has several advantages. First of all, impulse sealers are instantly ready for use; there is no waiting until the unit has heated up sufficiently, effectively reducing production times, for instance. Secondly, unlike constant heat sealers, which require continual electricity supply for continued use, this type of sealer only requires power during the actual process of sealing, making it far more economical.

Thirdly, the risk of injury to operators is greatly reduced, as there are no constantly hot surfaces, and finally, but by no means least importantly, because both fusion and cooling of the seal take place under pressure, seals are always clean, tidy and consistent in strength.

ONPUL impulse sealers are a much more advanced version of this concept.

Essentially, ONPUL stands for ‘temperature control impulse sealer. It is a term put together from ‘ON’ – derived from the Japanese word for temperature, ‘Ondo’ – and ‘PUL’ which comes from the ‘pulse’ in ‘control impulse sealer’.

To put it in a nutshell, ONPUL impulse sealers have a special added function that makes them even more efficient than other systems using this concept, namely the ability to monitor and maintain the desired setting to seal at a given ideal temperature.

High-precision sealing is achieved through melting film at its precise fusing temperature, then allowing it to cool while remaining under pressure. Once the desired temperature has been set, it is maintained by micro-computer control and high-sensitivity, low-profile sensors directly measuring the temperature of the heater blades.

As a result, seals will remain clean and strong even after prolonged use – such as in volume production runs, for example.

Because the temperature is continually monitored and adjusted to remain at the ideal setting, changes in environmental or machine temperatures no longer lead to changes in the appearance and/ or strength of seals.

In addition, ONPUL impulse sealers are also extremely energy and labor efficient. Heaters are only supplied with power as and when needed, and only require enough power to achieve the desired temperature, meaning there are no waiting times or excess use of electricity. Because parts are only heated when in use – and are then kept at a constant temperature – wear, which is often a result of gradual over-heating, is also reduced.

In short, ONPUL impulse sealers allow you to set the ideal conditions required to achieve perfect seals every time, even after long periods of use, while simultaneously providing substantial savings on time, effort and maintenance. This makes them the most reliable and cost-effective solution to sealing requirements in any given setting – from food or medical to industrial and/ or technological component packaging and anything between.

A range of available sizes – from table top and semi-automated table top and foot-operated sealers to medical, vacuum and long size sealers – further ensures that equipment is available to suit any sealing requirements in a whole range of industries.