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Etched Ptfe SheetPTFE is an amazing  non-stick material,Website:http://www.eptfe-industry.com, but what about when you need to glue it to the suface of  another material.In order to bond standard PTFE to another surface such as  stainless steel, a process called "etching" is required. Typical applications  would include the lining of chemical process tanks or other equipment used in caustic environments. When bonding is needed, sodium ammonia etching is usually  the most economical answer. This process uses of a mixture of sodium and  ammonia that is formulated to create a bondable surface bot