Polarized lens and method for manufacturing same

Abstract

The invention discloses a polarized lens and a method for manufacturing the same. In the process of manufacturing the polarized lens of the invention, a poly vinyl alcohol (PVA) membrane is inserted between a tri acetyl cellulose (TAC) membrane and a cellulose acetate propionate (CAP) membrane or between the tri acetyl cellulose (TAC) membrane and a polymethyl methacrylate (PMMA); or materials with different chemical properties and physical properties are attached to two sides of the poly vinyl alcohol (PVA) membrane, and then the polarized lens is manufactured. The polarized lens is used for preventing foreign matters from hurting eyes or dazzling caused by light rays, and has excellent transparency.

Description

technical field [0001] The invention relates to a polarizing lens and a manufacturing method thereof. The present invention utilizes the function of light interference to prevent glare, in order to prevent glare caused by direct light and reflected light in sports fields such as skiing, snowboarding, skating, boats, bicycles, motorcycles, manufacturing, construction and civil engineering, etc. , and prevent wind, snow, rain, sea water, water, sand, medicine, foreign matter, etc. from harming the eyes and are used in goggles and glasses. Background technique [0002] Generally, polarized lenses are made of polymer resin polarized lenses made of glass material and polymer synthetic resin as the main raw materials, but the production of polarized lenses for glasses made of polymer synthetic resin focuses on lenses without degrees. [0003] In the above-mentioned manufacturing method of polarizing lenses, the method of pasting polarizing films on the front and back of CR39 lens...

AI Technical Summary

Problems solved by technology

[0007] But this method is to cut and insert the TAC-PVA-TAC polarizer once, and then process the thickness, so the production efficiency is very low, the supply is very slow, and the original price will rise, so it is a non-production product.

That is to say, this process does not reach the spectacle lens after one operation of triacetyl cellulose (TAC; Tri Acetyl Cellulose) + polyvinyl alcohol (PVA; Poly Vinyl Alcohol) + triacetyl cellulose (TAC; Tri Acetyl Cellulose). The required thickness, so CR polarized light and PC polarized light are formed after supplementing CR or PC; there is also a kind of TAC polarized light which is triacetyl cellulose (TAC; Tri Acetyl Cellulose) + triacetyl cellulose (TAC; Tri Acetyl Cellulose) + polyethylene Alcohol (PVA; Poly Vinyl Alcohol) + Tri Acetate Cellulose (TAC; Tri Acetyl Cellulose) + Tri Acetate Cellulose (TAC; Tri Acetyl Cellulose) and other methods for multi-layer attachment, but due to the multi-layer attachment must use the attachment Solvents will cause low transparency

[0008] In order to solve the above problems, polyvinyl alcohol (PVA; Poly Vinyl Alcohol) is inserted between triacetylcellulose (TAC; Tri AcetylCellulose) films or between acetate propionate (CAP; Cellulose Acetate Propionate) films when making polarized lenses. ) film, which is only used to make polarized lenses for substances of the same nature, but this cannot meet consumers’ requirements for preventing eye damage from foreign matter or preventing glare caused by light

That’s because Tri Acetate Cellulose (TAC; Tri Acetyl Cellulose) as the main raw material for spectacle lenses generally has a production thickness of 0.04mm to 0.245mm. To make spectacle lenses with a thickness of 1.0mm, at least four layers must be attached. If you want to make spectacle lenses The ideal thickness is 2.0mm, and eight layers must be attached, so there are disadvantages such as low transparency due to adhesives and multiple layers, and very low work efficiency and production.

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