Hot Air versus Gas Flame

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30 September 2023 | Bergstrøm Plastteknik A/S

CO₂ Footprint
To reduce the CO₂ footprint hot air offers the option to consume the power from renewable resources like wind power, solar power, etc. Gas cannot offer this benefit since it requires fossil resources.

Factory Safety Requirements
Using hot air eliminates all the costly safety requirements for gas. Operator Safety
There is no open flame with hot air. Hot air systems are enclosed in organic fiber based ceramics and have a very low surface contact temperature even though the process operates at 900°C.

Energy Requirement
Typical energy consumption for a flame sealer with gas burners is appropriately 90kW. Hot air systems also use approximately 90kW.

Process Reproducibility
Setting up the machine for each type of board is much easier and more precise with electric heaters. The welding seam is much more precise.

Speed and Temperature
The sealing unit reaches production speeds up to 700m/min and operates with an air temperature of 900°C. With the sealing units, the temperatures and the air flow can be controlled very easily. This makes the hot air process much more precise and climate-friendly
than the process with gas flame.

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Bergstrøm Plastteknik A/S

Bergstrøm Plastteknik A/S offers solutions for hot air processes in industry from LEISTER Technologies. In line with the demand partly for solutions to replace industrial gas burners and not least in line with electrification, LEISTER has developed high-performance air heaters and air blowers.

In addition, air heaters and air blowers have been developed so that they can be included in recirculation processes, i.e. recycling of the hot air.

In the segment for plastic welding, LEISTER has developed extruders for mounting either on robots or production lines.
In the more sophisticated part

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