A process and apparatus for embossing thermoplastic products having precise microstructured surfaces including using a continuous press having upper and lower belts with the embossing pattern(s); feeding thermoplastic material through the press where heat and pressure are applied to form the embossed...http://www.google.es/patents/US6908295?utm_source=gb-gplus-sharePatente US6908295 - Process and apparatus for embossing precise microstructures and embossing tool for making same
Process and apparatus for embossing precise microstructures and embossing ...
