Non-stick coating – clearly explained

Coating with PTFE (polytetrafluoroethylene) in the melting tank, which prevents hot-melt adhesives from sticking to the tank walls.  

The very low surface tension of PTFE means that no other material will stick to this material.

This makes the melting tank easier to clean. The excellent sliding properties of the coating material produce a self-lubricating effect.

This is particularly important as the melting tank is not smooth, but is equipped with heating fins for better heat transfer.

HB 720 K for reactive hot-melt adhesives with PTFE-coated tank

PTFE

PTFE is now the most commonly used fluoroplastic in many branches of industry and is known under such trade names as Teflon^®, Dyneon TM, Fluon^® or Gore-Tex^®.

The thermal properties of PTFE make it suitable for our application, because it is stable over a wide temperature range. The material has a thermal stability from -200 to +260 degrees Celsius.

PTFE was discovered by chance in 1938 by chemist Dr Roy Plunkett. It was an accidental by-product: the American worked for DuPont and was actually looking for the best refrigerant for refrigerators.  

In 1954, Colette Grégoire came up with the idea of coating pots and pans with Teflon. This idea was very successful: just two years later she founded the Tefal company.

The new melting tank of an HB 6000