Polyethylene (PE) is a versatile material. It is used in sheet form, e.g. for construction purposes to insulate from moisture. In the packaging industry PE sleeves protect goods from moisture or simply from the effects of air. The material is fed into the sleeve or bag, which is then closed with a film sealing device. In certain cases the air is sucked out before sealing.

But PE foil has the nasty property of sticking to the heated bar that seals it. In industrial applications this causes machine downtime, costing not only time but money. The bar has to cool off before it can be cleaned and production resumed.

To prevent downtime, a manufacturer of foil sealing equipment asked Impreglon Keyontechs in Shanghai to help with this problem. The solution was to treat the welding bars with a PTFE-based coating. PTFE stands for polytetrafluoroethylene, known more commonly to most people as Teflon, the trade name of the nonstick coating applied to cooking utensils.

The system used in this case is a reinforced PTFE coating with good nonstick properties and high resistance to abrasion. And the coating is heat-resistant up to 260°C.

This ensures effective and continuous operation and a long serviceable life of the foil sealing devices.

The coating material is applied to the carbon tetrachloride bars using a normal wet-spraying process. The sealing bars vary in length from 200 mm to 500 mm, and between 100 and 200 bars are currently being coated per month.The customer has noticed a welcome side effect: The coating facilitates uniform heat distribution – the bars do not overheat anymore and they last much longer.

So if you think you may have a challenge that teflon could solve, why not get in touch?

Call us on +61 2 9603 2388 or contact us to find out more.