Anti-fog photochromic lens and manufacturing method thereof

Abstract

The invention discloses an anti-fog photochromic lens and a manufacturing method thereof. The preparation method comprises the following steps: mixing a photochromic material in glue, sticking a second transparent plastic sheet to the inner side surface of a first transparent plastic sheet through the glue so as to form a photochromic material layer between the first transparent plastic sheet andthe second transparent plastic sheet to guarantee no falling and no damage failure during long-time use of the photochromic material layer, and sticking an anti-fog film to the inner side surface of the second transparent plastic sheet to preliminarily form an anti-fog photochromic compound sheet having anti-fog and photochromic effects; then pre-putting the anti-fog photochromic compound sheet into a cavity of a lens forming mold, injecting a molten lens forming material into the cavity to enable the high-temperature molten lens material to be closely bonded with the first transparent plasticsheet by use of the bonding force of the high-temperature molten lens material, and finally curing the material to form the multilayer structured anti-fog photochromic lens. Meanwhile, the anti-fog photochromic lens has the anti-fog and photochromic effects; furthermore, the connection strength between all the layers of structures is high, so that looseness is avoided even if the lens is used fora long time.

Description

technical field [0001] The invention relates to the field of lens technology, in particular to an anti-fog color-changing lens and a manufacturing method thereof. Background technique [0002] Existing lenses (mainly helmet lenses, ski lenses, or spectacle lenses, etc.) are mostly made of PC (polycarbonate) materials, and lenses made of PC materials do not have anti-fog and discoloration functions. [0003] In order to make the lens have the above functions, the existing solution is to directly glue a layer of anti-fog film on the inner surface of the lens (that is, the surface of the side close to the user's eyes when the lens is in use) to achieve anti-fog and ensure that the lens is normal. The effect of light transmission forms an anti-fog lens. Or spray a layer of photochromic material layer on the outer surface of the lens (that is, the surface on the other side away from the user's eyes when the lens is in use) to achieve photochromic, sunshade and anti-glare effects...

AI Technical Summary

Problems solved by technology

[0004] However, the above method still has some disadvantages. The reasons are: 1. The inner surface of the PC injection-molded lens is hard and smooth, and it is difficult to bond with the anti-fog film (usually TAC anti-fog film), and after bonding, It is easy to produce air bubbles and affect the light transmittance and aesthetic feeling

2. The photochromic material layer is directly sprayed on the outer surface of the lens and is in an exposed state. After a long time of use, it is prone to fall off, damage and failure

3. In the prior art, there is no functional lens with both anti-fog and color-changing functions

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