HIGH REFRACTIVE INDEX POLARIZING LENS

摘要

A polyurethane based high refractive index polarizing lens consisting of a polarizing film and a cured monomer mixture placed on both sides of said polarizing film, in which the polarizing film consists of a heated polyvinyl alcohol having a water content of 4.5% or less, and the cured monomer mixture comprises a polyisocyanate and a polythiol, has no problems such as the generation of bubbles, and has excellent adhesiveness. A manufacturing method for high refractive index polarizing lenses including a process for forming lens layers comprising a polyurethane based polymer formed from polyisocyanate and polythiol on both surfaces of a polarizing film, characterized by using a polarizing film whereof the water content is 4.5 wt % or less as the aforementioned polarizing film.

主权项

1. A polarizing lens consisting of a polarizing film and a cured monomer mixture placed on both sides of said polarizing film, wherein said polarizing film consists of a heated polyvinyl alcohol having a water content of 4.5% or less, and said cured monomer mixture comprises a polyisocyanate and a polythiol,
said polarizing lens being manufactured by a method comprising the steps of: heating and drying a polarizing film comprising a polyvinyl alcohol at a temperature lower than a glass transition point of said polyvinyl alcohol such that a water content of said polarizing film is 4.5 wt % or less; placing said polarizing film inside a mold set for lens casting; filling a gap between each of said molds and said polarizing film with a monomer mixture comprising a polyisocyanate and a polythiol; and curing said monomer mixture by polymerization.