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Hardcoats
April 2006
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Specifically engineered to meet the demands of opto-electronic lens and appliance applications, Tekra’s Terrapin® G Nano-Hardcoats are said to raise the bar for surface durability while retaining substrate flexibility and optical clarity. On polyester film substrate, the coating is said to achieve pencil hardness of 3 H on the JIS 9401 test (750 g of pencil force) and 4 H on the ASTM D3363 test (300 g of pencil force). On polycarbonate, the product achieves HB pencil hardness on either test. According to the company, all results represent significant improvements over commonly available hardcoats. Abrasion resistance is similarly improved by approximately
20 percent over other hardcoats, based on Taber Abraser testing conducted at the company’s laboratories in suburban Milwaukee, Wisconsin, U.S.
The coating draws on nanotechnology. Specifically, tiny nanomaterial particulates allow creation of a coating that is immediately extremely hard, flexible and optically transparent. The company reports that in every durability test, the product is equal to or better than other hardcoats. According to the company, the results position its hardcoats as a superior product for flat-panel displays, personal digital assistants, cell phone lenses, signature verification windows, LCDs and organic light-emitting diodes (OLEDs), and other high-use opto-electronic applications.
Additionally, the company says that its resistance to common household and industrial cleaning chemicals, as well as to oils and food products, enable it to meet the needs of appliance manufacturers for touch panels and nameplates, while also exhibiting superior adhesion to sputter coated metals and oxides.
The product is available in web widths up to 60 inches in thicknesses of 2 mil, 3 mil, 4 mil, 5 mil, 7 mil, and 10-mil. In polycarbonate, the hardcoating is available in web widths up to 48 inches and thicknesses of 7 mil, 10 mil, 15 mil, 20 mil, 25 mil, and 30 mil. Custom slitting and sheeting is available from the company, and can also be configured with interleaving, mask on second surface, or mask on both surfaces. www.tekra.com

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