Compound polarized sunglasses lens and production process thereof

Abstract

The invention relates to a compound polarized sunglasses lens and a production process thereof. The lens comprises an upper single-side anti-scratching piece layer (150[mu]m-300[mu]m), a thickening material piece layer (100[mu]m-600[mu]m), an ordinary polarized piece layer (150[mu]m -270[mu]m), a colored piece layer (100[mu]m-240[mu]m) and a lower single-side anti-scratching piece layer (150[mu]m -300[mu]m). The production process comprises the following steps: respectively and simultaneously unwinding, compounding, drying and winding the processed upper single-side anti-scratching piece layer, the processed thickening material piece layer, the processed ordinary polarized piece layer, the processed colored piece layer and the processed lower single-side anti-scratching piece layer, wherein when the piece layers are compounded, the layers are pasted with a polyvinyl acetal adhesive; after being compounded, the piece layers are dried through a plurality of drying ovens at a uniform speed; the temperature in each drying oven is set to be 50-60 DEG C; finally sequentially cutting the compounded coiled materials for producing the lens into strips, cutting into pieces and forming.

Description

technical field [0001] The invention relates to the field of polarized lenses, in particular to a composite polarized sunglasses lens and a manufacturing process thereof. Background technique [0002] With the continuous improvement of people's living standards, many people will drive to work or participate in outdoor activities. However, when the sky is sunny and the sun is strong, the sun will directly hit the driver's eyes and affect the judgment of the object, causing danger, and long-term Exposure to direct sunlight can also lead to a rapid decline in vision, resulting in myopia, hyperopia, astigmatism, or cataracts. Because polarized sunglasses can filter out ultraviolet rays in the beam, drivers usually prepare sunglasses for emergencies. Many polarized sunglasses lenses on the existing market are formed by high-temperature injection molding, and polarized sunglasses lenses formed by injection molding have poor polarizing effect, complicated manufacturing process, hig...

AI Technical Summary

Problems solved by technology

[0002] With the continuous improvement of people's living standards, many people will drive to work or participate in outdoor activities. However, when the sky is sunny and the sun is strong, the sun will directly hit the driver's eyes and affect the judgment of the object, causing danger, and long-term Exposure to direct sunlight can also lead to a rapid decline in vision, forming nearsightedness, hyperopia, astigmatism or cataracts, etc. Because polarized sunglasses can filter out ultraviolet rays in the beam, drivers usually prepare sunglasses for emergencies

Many polarized sunglasses lenses on the existing market are formed by high-temperature injection molding, and polarized sunglasses lenses formed by injection molding have poor polarizing effect, complicated manufacturing process, high cost, poor environmental protection, and poor lens clarity. Prospects are not promising

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