Bi-layer adhesive for lens lamination

摘要

A method for laminating a film on to an optical article and a bi-layer adhesive for use in the method. The bi-layer adhesive includes a latex adhesive layer and an HMA layer sequentially disposed on the film and dried to form a solid layer of uniform thinness throughout to provide optical quality. Various types of films may be employed to provide an optical function. Following optional pre-treatment steps, the adhesives are coated on to the film. An optical hot press technique is used to deliver heat and pressure over a short period of time to form a functionally-enhanced optical article with high adhesive strength.

主权项

1. A method for manufacturing a functionalized optical element comprising:
providing an optical base element; providing a functionalized layered structure that includes at least one functional layer, such that the functionalized layered structure adheres to the optical base element, the providing including the steps of:
applying a first coating as a layer of latex adhesive onto one exposed surface of the at least one functional layer;drying said first coating thereby forming a dried latex adhesive layer which bonds strongly to the at least one functional layer;applying a second coating as a layer of hot-melt adhesive (HMA) onto the dried latex adhesive layer to form a uniformly thin bi-layer adhesive lamina of optical quality, wherein a polymer for forming the HMA layer includes only a thermoplastic polymer;drying the second coating applied as the HMA layer before hot pressing,each of the first coating and the second coating comprising a different adhesive layer; and upon preparing the bi-layer adhesive lamina, hot pressing the functionalized layered structure against the optical base element with the bi-layer adhesive lamina therebetween, whereby the second coating formed as a dried HMA layer bonds with the optical base element, the bi-layer adhesive lamina forming a functionalized optical element, such that a high adhesive strength is thereby provided between the optical base element and the functionalized layered structure by using the latex adhesive and the HMA layer in combination to form the bi-layer adhesive lamina to address disparate material properties between the at least one functional layer and the optical base element.