Causes of Coating Failure
At the end of its life, DuraShield® will ultimately fail due to thermal breakdown. Thermal breakdown occurs gradually on a molecular level as a pan is subjected to normal baking temperature variations.
Each time a pan is heated and cooled, microscopic cracks begin to form in the coating. Eventually these cracks will grow large enough to allow the accumulation of baking residue, causing the coating to lose its non-stick properties.
Preventing Damage from Thermal Breakdown
Line Breakdowns – Shut off heat during oven stoppages if possible.
Uneven Heating – Oven experts should check to ensure that oven heat flow is consistent throughout the oven.
Panning – Strive to keep empties to a minimum to get the longest life from DuraShield®. Ideally, all of the moulds within a pan should have dough deposited in them.
Mechanical abrasion from equipment or practices in your bakery may wear through the DuraShield® coating. Although DuraShield® was designed to withstand the typical conditions of a high-volume bakery and is resistant to abrasion, care must still be taken to prevent unnecessary abrasion from wearing the coating prematurely.
Preventing Damage from Abrasion
Brushes – Cleaning brushes should be soft and adjusted so they do not ride too close to the surface of the pan to avoid marring the DuraShield® coating.
De-Panners – Adjust the de-panner to lift the product out of the mould as straight as possible. Ensure that the de-panner head and pan conveyer are traveling at the same speed.
Excessive Air Pressure – When the air pressure is too high, it can blast seeds, crumbs and cornmeal into the pan surface. This will cause the coating to wear prematurely.
Pan Indexers – Adjust the indexing fingers to prevent scratching the coated surface. Padding the fingers with Teflon® or rubber will help reduce friction and wear.
Stacking – Avoid dropping pans at an angle to minimize scraping the DuraShield® on the inside of the pans. Use extra care when using a pan as a cover for pans in storage.
Accumulation of Ingredient & Product – Incomplete cleaning allows ingredients and product to gather on the coated surface and will cause a degradation of non-stick properties. Mild brushing with a soft brush, or the vacuuming of food residue, is essential to obtain maximum coating life.