EVOCHEM’s new super-hydrophobic product line (EVOCHEM ETC-ULTRA & EVOCHEM ETC-PRO) provides superior process and film properties. We have developed sophisticated materials that reduce the adherence of dirt and fingerprints on surfaces while at the same time increasing the scratch resistance.
The new super-hydrophobic tablets can be deposited from resistively heated boats as well as by E-Beam using a Top Coat liner.
While leading the way into next generation’s coatings, EVOCHEM’s new product portfolio already complies with the latest legislatives requirements and does not contain Perfluorooctanesulfonic acid (PFOS) and Perflurooctanoic acid (PFOA) – neither in the product nor in the entire production line.
Key product features:
+ Fingerprint and dirt repellent
+ Super-hydrophobic – oleophobic – extra smooth surface
+ Applicable to almost all substrates
EVOCHEM ETC reduces the surface energy to a minimum and therefore allows for easy-to-clean properties. Further-more the coating (e.g. AR layers) and the substrate itself are protected by a very smooth and scratch resistant nano layer. Depending on your particular application EVOCHEM ETC-PRO or ETC-ULTRA is the right choice.
Application: EVOCHEM ETC-PRO and EVOCHEM ETC-ULTRA are available as ready-to-use tablets for thermal vapor deposition as well as for E-Beam process, using a Top Coat liner. Alternatively, the coating can be completed by a wet-chemical process (dipping, spraying, flooding) - ETC-LIQUID and ETC-METAL-LIQUID.
Mode of action: ETC forms with the one end of its molecular chain covalent, highly stable bonds to oxide surfaces (e.g., SiO2) while the other, perfluorinated end, aligns itself away from the surface. As a result, ETC reduces the surface energy to a minimum and therefore allows for easy-to-clean properties. Furthermore the coating (e.g. AR layers) and the substrate itself are protected by a very smooth and abrasion resistant nano layer. EVOCHEM’s new product portfolio already complies with the latest legislatives requirements where Perfluorooctanesulfonic acid (PFOS) and Perflurooctanoic acid (PFOA) are not present in neither the product nor the entire production process.
Performance: Initially, the material is applied by vapor deposition on a SiO2 layer providing a contact angle against water of 117 °. During the entire test procedure, even after 8000 cycles with 1 kg pressure, the contact angle does not fall under 105 °. ETC-LIQUID - developed for mobile phones and touch displays - has demonstrated an even higher abrasion resistance. Despite the reduction of the surface roughness by about 85%, the shaping of lenses can be performed easily without any alteration in the production process. After grinding, several tests have shown that the coating relaxes completely and no "ghost marks" remain on the surface.
Green Production: The pills are delivered in blister packs with 12 tablets per unit. Each pack allows a shelf life of 6 months and reduces waste by about 90% compared to individual packaging. Furthermore, our carrier tablets can be reused approximately 10 times more and therefore reduces further waste and cost. Please do not hesitate to contact us if you would like to obtain further information or samples for testing.
EVOCHEM ETC-PRO is a dedicated product line for the ophthalmic industry. High abrasion resistance and an easy-to-clean surface make it the optimal choice for leading ophthalmic companies around the globe. Our strong brand and market presence will also be a key differentiator for you and your customers.
EVOCHEM ETC-ULTRA provides superior super-hydrophobic and oleophobic properties and therefore enables a conve-nient surface cleaning – especially for AR-coatings which are easily contaminated by fingerprints and smudge. The excellent surface smoothness also increases the abrasion resistance significantly.
By applying hydrophobic (superhydrophobic) and oleophobic nanolayers, almost all interfaces can be modified without affecting the original functional/optical properties of the interface. Wet-chemically produced hydrophobic layers usually have an irregular structure composed of many different components. In contrast, PVD deposition of hydrophobic and superhydrophobic materials under vacuum allows the interfaces of the substrates to be coated to be optimally adapted to the requirements of a self-organizing hydrophobic nanostructure by appropriate process control.
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Article: Next generation of superhydrophobic materials
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