Optical film, manufacturing method thereof and backlight module

The invention discloses an optical film, a manufacturing method thereof and a backlight module. The optical film comprises a cadmium-free quantum dot adhesive layer and a polyester film, and the cadmium-free quantum dot adhesive layer comprises a first polymer and a plurality of cadmium-free quantum dots dispersed in the first polymer. The first polymer includes 1 to 5 wt% of a photoinitiator, 3 to 30 wt% of scattering particles, 10 to 40 wt% of a thiol-based compound, 5 to 30 wt% of a monofunctional acrylic monomer, 5 to 20 wt% of a difunctional acrylic monomer, 10 to 40 wt% of a polyfunctional acrylic monomer, 5 to 20 wt% of a silicone grafted oligomer, and 100 to 2000 ppm of an inhibitor. Through the formula composition of the cadmium-free quantum dot adhesive layer, a cadmium-free optical film can be provided, and a high water and oxygen resistance effect can be maintained. 本发明公开一种光学膜及其制造方法与背光模块。本发明光学膜包括一无镉量子点胶层以及一聚酯膜，无镉量子点胶层包含第一聚合物以及分散于第一聚合物的多个无镉量子点，第一聚合物包括1至5wt％的光起始剂、3至30wt％的散射粒子、10至40wt％的硫醇类化合物、5至30wt％