Preparation method for colored eyeglass with colored coating

Abstract

The invention relates to a preparation method for colored eyeglass with colored coating. The preparation method comprises the following steps that (1) a pigment or dye is dissolved; (2) a hardening solution is prepared to harden basic glass primarily; and (3) secondary hardening is carried out to obtain a finished product, namely, the eyeglass which is hardened and solidified in the step (2) is hardened at the surface at the temperature of 110 DEG C for 2 hours, cooled, detected and form the finished product if qualified. According to the method, the dye or pigment is directly added to the hardening solution, the solution is in the color to be dyed, the basic eyeglass is immersed in the hardening solution and hardened to form the colored eyeglass, the dye added into the hardening solution is controlled to achieve different colors and darkness, the method is fully automatic and does not need manual operation, the labor intensity as well as stimulation to a solvent are reduced, the dyeing speed is very high, and the efficiency is very high.

Description

technical field [0001] The invention belongs to the technical field of lens processing, and in particular relates to a method for preparing colored sunglass lenses with colored layers. Background technique [0002] At present, the materials used as lenses are allyl diglycol carbonate lenses with a refractive index of 1.499, acrylic lenses with a refractive index of 1.56, polyurethane lenses with a refractive index of 1.60 and 1.67, polycarbonate PC lenses, and 1.74 refractive index lenses. The lenses of the episulfide polymer, all these spectacle lenses are mainly realized by the following method when they are used as the lenses of sunglasses. First, the lenses are poured and solidified or injection molded through a glass mold or a plastic mold to obtain the molded lenses. The lens has all the characteristics required by optical lenses, and then the surface of the lens is dyed through the dyeing solution. The main component of the dyeing solution contains benzyl alcohol dyei...

AI Technical Summary

Problems solved by technology

In order to overcome some problems in the dyeing process, the current sun lenses are analyzed first, such as the sun lenses using the first method, which is dyed on the surface of the lens. The biggest problem of this method is that it is very different from the degree of polymerization of the monomers of the lens. The big relationship, the high degree of polymerization of the material makes it difficult to dye. The essential reason is that the degree of monomer polymerization is large, the gap between the monomers of the lens is small, and it is difficult for inorganic pigments to penetrate, which makes it difficult to achieve the depth of dyeing. At the same time It will also affect the consistency of the color

The sun lenses using the second method directly add pigments to monomers, such as PC materials. Since PC lenses are processed by injection molding, the pigments (particle diameter greater than 0.4 microns) can be directly entered into the mold through the screw of the injection molding machine. Finally, sun lenses are formed, but the monomers of other materials are produced by casting. This method requires that the pigments have good dispersion in the monomers, and at the same time, there is no or little filterability in the monomers. Only in this way can the color of the final lens be guaranteed, but this method has another defect, that is, when the sunglasses we wear have a prescription requirement, the lens at this time has a certain diopter, and the existence of this diopter causes the lens to be damaged. The thickness of the edge of the lens is not consistent with the thickness of the center. Even when the lens has astigmatism, the thickness of the edge will be different. In this case, the method of adding pigments to the body will have thick places and thin places. Defects of varying depth

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