Manufacturing soft silicone gel contact lens and silicone hydrogel contact lens having hydrophilic surface, comprises coating a male mold and female mold of a cast mold on respective surfaces with a film of hydrophilic biomedical material

摘要

The method comprises coating a male mold (10) and a female mold (10a) of a cast mold on respective surfaces with a film of a hydrophilic biomedical material (20) and using ultra-violet radiation and/or heat source equipment to semi-cure the hydrophilic biomedical material film, filling a main lens raw material (30) into the female mold coated on the surface, pressing the male mold coated on the surface onto the female mold and then using the ultra-violet radiation and/or the heat source equipment for curing to bond the hydrophilic biomedical material films on the respective surfaces. The method comprises coating a male mold (10) and a female mold (10a) of a cast mold on respective surfaces with a film of a hydrophilic biomedical material (20) and using ultra-violet radiation and/or heat source equipment to semi-cure the hydrophilic biomedical material film, filling a main lens raw material (30) into the female mold coated on the surface, pressing the male mold coated on the surface onto the female mold and then using the ultra-violet radiation and/or the heat source equipment for curing to bond the hydrophilic biomedical material films on the respective surfaces of the male mold and the female mold with the main lens raw material and curing the same to a determined shape to form an optical lens, releasing the lens that is cast in the mold, and putting the lens into a normal saline and or organic solvent liquid tank for hydration, expansion and extraction so as to form a contact lens (100) having a sandwiched structure, which has a high oxygen-permeability body and a high hydrophilic surface. The hydrophilic biomedical material is pre-mixed or pre-polymerized with coloring material, dyes such as blue-19, pigments such as blue-15 and iron oxide, anti-UV material such as hydroxyphenoxy ethylacrylate, opaque cosmetic pigments such as titanium dioxide with pigment or opaque cosmetic dyes such as titanium dioxide with dyes according to desired functions of the contact lens. The hydrophilic biomedical material film is evenly coated on the respective surfaces of the male mold and the female mold by printing, spray printing, ink-jet printing, pad transfer printing, spin printing or ultrasonic printing. The hydrophilic biomedical material film has a thickness of 0.5-2 micron. The main lens raw material is soft silicone gels, or macromer of silicone gel and hydrogel, which are bonded with the function groups for chemical reaction to tightly bond the hydrophilic biomaterial and the silicone hydrogel material when it is cured. The hydrophilic biomedical material is added with cross-linking agents, is pre-mixed or pre-polymerized with dyes or pigments to produce tint or opaque cosmetic colors and with opaque cosmetic pigments, opaque cosmetic dyes and anti-UV materials.