METHOD AND APPARATUS FOR PRODUCING A HIGH ASPECT RATIO NANOSTRUCTURED FOIL BY EXTRUSION COATING OR EXTRUSION CASTING

摘要

Aspects of the disclosure relate to methods for making large areas of high aspect ratio micro or nanostructured foil using existing extrusion coating equipment. A method is disclosed for producing a high aspect ratio micro- or nanostructured thermoplastic polymer foil, or a nanostructured thermoplastic polymer coating on a carrier foil, comprising at least one high aspect ratio nanostructured surface area. The method comprises applying a high aspect ratio nanostructured surface on an extrusion coating roller and maintaining the temperature of the roller below the solidification temperature of the thermoplastic material. A thermoplastic foil and a thermoplastic coating made by the method is also disclosed.

主权项

1. A method for producing a nanostructured thermoplastic polymer coating on a carrier foil comprising at least one high aspect ratio nanostructured surface area, said method comprising at least the following steps:
providing an extrusion coating roller for an industrial polymer extrusion coating process using a thermoplastic material; applying a high aspect ratio nanostructured surface on the said extrusion coating roller thereby forming a high aspect ratio nanostructured extrusion coating roller; maintaining the temperature of the said high aspect ratio nanostructured extrusion coating roller below the solidification temperature of the said thermoplastic material; moving a carrier foil between the rotating high aspect ratio nanostructured extrusion coating roller and a rotating counter pressure roller at a given velocity corresponding to the rotational velocity of the rotating high aspect ratio nanostructured extrusion coating roller; and continuously applying a melt of said thermoplastic material between the said moving carrier foil and the said rotating high aspect ratio nanostructured extrusion roller, whereby said thermoplastic melt is solidified upon contact with said high aspect ratio nanostructured extrusion coating roller maintained at a temperature below the solidification temperature of the said thermoplastic melt thereby forming a solid high aspect ratio nanostructured thermoplastic coating on said carrier foil.