TWM521191U - Multi-layered contact lenses with enhanced colorant coverage - Google Patents

Description

Enhanced color coating coated multi-layer contact lenses

The present invention relates to a contact lens that coats a color layer containing a colorant, and more particularly to a multi-layer contact lens that enhances color coating.

According to the commonly known color contact lenses or dyed contact lenses, a colored layer is coated on the surface or inside of the contact lens. In addition to correcting the vision by the lens, the wearer can also attach a colored layer. Strengthen or change the color and size of the iris of the eye to enhance the beauty of the eyes, so it is widely loved by the world.

At present, the industry generally uses a Print Pad method to attach a colorant-containing coloring agent to the lens surface of the contact lens or to the inside of the lens to make the colored contact lens or the dyed invisible. glasses. For example, Taiwan Patent No. M339691 discloses a layer structure technology of a layered coated contact lens, which teaches that a colorant layer is coated between a soft and transparent upper lens and an underlying lens to avoid direct coloring agent. Contact the wearer's eyeballs, or avoid color fading that can cause eye irritation or scratches the eye.

In addition, for example, Taiwan Patent Publication No. 201318857A discloses a technique for producing a dyed contact lens, which is taught to spray, coat or soak a surface of a contact lens body containing a colored layer (ie, a colorant layer) as a covering material. The oligopolymer, the oligopolymer covering material comprises polyhydroxyethyl methacrylate (PHEMA) and a solvent, and the surface of the mirror body having the colored layer is formed into a transparent film, which is then solidified to volatilize the solvent. A dyed contact lens having a protective transparent film is obtained. By doing so, the manufacturing process of the dyed contact lens can be simplified and speeded up.

It can be seen from the above that the dyed contact lens prepared by coating the coloring agent-containing coloring agent layer in the lens is a well-known technique, but the protection measures for the coloring agent to contact the human body in the coloring agent layer are still not perfect; Specifically, since the dyed contact lens is soft in texture, the wearer often repeatedly bends the lens body during the process of wearing or cleaning, forcing the stability of the colorant layer coated in the lens body under endurance use. There are still deficiencies, so there is still a possibility that the colorant layer is easily deformed and not flattened, the pigment of the color material is exposed, the protective layer is too thin, and the problem of easy generation of holes is generated, which needs to be refined and improved.

In view of the above, the object of the present invention is to provide a multi-layer contact lens for enhancing color coating, which is used for improving the stability of the coloring agent layer coated inside the conventional colored contact lens under endurance use.

In order to achieve the above object and solve the problem, the preferred technical means adopted by the present invention comprises: a lens, a lower protective layer and a colorant layer, the colorant layer being composited between the lens and the lower protective layer, wherein the lower layer A composite adhesive layer is also included between the protective layer and the colorant layer.

In a further implementation, the present invention further includes that the number of layers of the adhesive layer may be plural. A composite upper protective layer is further included between the colorant layer and the lens. The number of layers of the upper protective layer may be plural.

According to the above technical means, the technical effects that the novel can produce are:

1. By virtue of the formation of the adhesive layer, it is helpful to coat the lens body with a contour with a colorant in the colorant layer.

2. By virtue of the formation of the upper protective layer, the monomer material of the lens is facilitated during the injection molding process, and the hydrophilic colorant layer is not absorbed by the monomer material of the lens, thereby effectively preventing the colorant layer from being The contour of the graphic is deformed.

3. The composite structure of the colorant layer coated with the adhesive layer and the multilayer protective film can improve the firmness of the composite of the colorant layer and the stability of the exposed body.

The technical means described above and the specific implementation of its efficacy For details, please refer to the following examples and drawings for explanation:

10‧‧‧Mirror body

11‧‧‧ lenses

12‧‧‧ lower protective layer

13‧‧‧Colorant layer

14‧‧‧Adhesive layer

15‧‧‧Upper protective layer

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view showing a first preferred embodiment of the present invention.

Figure 2 is a cross-sectional view of the additional embodiment of Figure 1.

Figure 3 is a cross-sectional view of a second preferred embodiment of the present invention.

Figure 4 is a cross-sectional view of the additional embodiment of Figure 3.

Referring first to FIG. 1 , a cross-sectional view of a preferred embodiment of a multi-layer contact lens provided by the present invention is disclosed. The mirror body 10 of the multi-layer contact lens includes a lens 11 and a lower protective layer 12 . A colorant layer 13 in which the colorant layer 13 is laminated between the lens 11 and the lower protective layer 12, and a composite adhesive layer 14 is further included between the lower protective layer 12 and the colorant layer 13.

Further, the lower protective layer 12 is prepared by mixing a polymer mixture which is a transparent solid after drying with a volatile solvent to form a liquid colloid having a suitable viscosity, and using a plastic head for pad printing (prior art, it is not attached) The figure reveals that the liquid colloid which is to form the lower protective layer 12 is applied, and after waiting for a suitable drying time, the polymer layer of the liquid colloid is formed on the rubber head, and then the polymer layer of the liquid colloid is printed to one. The lower protective layer 12 is formed by solidification in the cavity.

The adhesive layer 14 can be used in the same manner as the liquid colloid of the lower protective layer 12, but the blending ratio of the polymer mixture to the volatile solvent can be different to control the solid after drying. The degree of dryness and hardness of the polymer mixture; in particular, the hydrophilicity of the solid polymer mixture used in the adhesive layer 14 can be selected more than the hydrophilicity of the lower protective layer 12 and the hydrophilicity of the colorant layer 13. It is prepared by modulating a hydrophilic solid polymer mixture. When the pad printing is carried out, the coverage of the coloring agent layer 13 to be formed (i.e., the distribution range of the pattern outline of the colorant layer 13) can be visualized, and the liquid colloid of the adhesive layer 14 is pad printed to the lower protective layer 12 within the range. Upper surface. In addition, during the printing process of the adhesive layer 14, the colorant layer 13 can also be printed. The wet deformation at the time of removal and the state in which the colorant layer 13 penetrates the adhesive layer 14 increase the number of the printing layers of the adhesive layer 14, and therefore, in an additional implementation, the number of composite layers of the adhesive layer 14 may be a plurality of layers ( As shown in 2).

As shown in FIG. 1, the colorant layer 13 is a solid polymer mixture which is transparent after drying, a volatile solvent, and a pigment (Pigment) to adjust a liquid colloid having a suitable viscosity, and the same shift as described above is used. In the printing and drying mode, the coloring agent layer 13 having a graphic outline (for example, a ring-shaped contour formed by dots or linear color materials) is printed on the surface of the adhesive layer 14 of the cavity to form a coloring layer. The attached graphic profile can be more stably coated within the scope 10 by the adhesion of the adhesive layer 14, wherein the surface of the adhesive layer 14 which is not composited by the colorant layer 13 is still exposed.

Also shown in FIG. 1 is a lens 11 located at the topmost layer of the lens body 10. The lens 11 is injected into the cavity by means of injection molding to contact the colorant layer 13, The surface of the adhesive layer 14 which is composited by the colorant layer 13 or even the periphery of the lower protective layer 12 which is not covered by the adhesive layer 14 on the periphery of the adhesive layer 14 is thus formed, and the colorant layer 13 and the adhesive layer 14 can be sufficiently coated. In order to compositely form the mirror body 10 of the multi-layer contact lens provided by the present embodiment.

In addition, referring to FIG. 3, a cross-sectional view of another preferred embodiment of the multi-layer contact lens provided by the present invention is disclosed, and the composite layer 13 and the lens 11 shown in FIG. 1 may further include a composite one. Upper protective layer 15. The upper protective layer 15 can be made of the same material as the lower protective layer 12, pad printing and drying, so that the liquid colloid of the lower protective layer 12 contacts and fully coats the colorant layer 13 in the cavity. In this implementation, the lower protective layer 12 is disposed so as to cover only the colorant layer 13 without completely covering the surface of the adhesive layer 14 which is not contacted by the colorant layer 13, and which is to be formed into the lens 11. When the monomer material is injected into the cavity, the monomer material of the lens 11 is a surface of the adhesive layer 14 which can be sufficiently coated with the protective layer 15, which is not composited by the colorant layer 13, and even the periphery of the adhesive layer 14 is not adhered. 14 surrounding the edge of the lower protective layer 12; wherein, in particular, in the present embodiment, the monomer material of the lens 11 is not in contact with the colorant layer 13, so it is effective The coloring agent 15 prevents the toner from leaking or fading, and the upper protective layer 15 can ensure that the monomer material of the lens 11 is not easily dispersed by the monomer material of the lens during the injection molding process, thereby effectively preventing the colorant. The outline of the graphic in the layer is deformed.

In summary, the multi-layer contact lens provided by the present invention can be indiscriminately determined, and the colorant layer 13 is coated with the multi-layer protective film of the adhesive layer 14, the lower protective layer 12 and the upper protective layer 15 as compared with The prior art not only enhances the coating property of the colorant in the colorant layer 13, but also enhances the firmness of the colorant layer after lamination and the stability of the exposed color, so the production of colored contact lenses (or dyed contact lenses) Technology has made a huge contribution.

However, the above embodiments are merely illustrative of the preferred embodiments of the present invention, but are not to be construed as limiting the scope of the present invention. Therefore, the present invention is subject to the content of the claims defined in the scope of the patent application.

10‧‧‧Mirror body

11‧‧‧ lenses

12‧‧‧ lower protective layer

13‧‧‧Colorant layer

14‧‧‧Adhesive layer

Claims (4)

A multi-layer contact lens for enhancing color coating, comprising: a lens, a lower protective layer and a colorant layer, the colorant layer being composited between the lens and the lower protective layer, wherein the lower protective layer and the coloring agent A composite adhesive layer is also included between the layers. The multi-layer contact lens with enhanced color coating as described in claim 1, wherein the number of layers of the adhesive layer is plural. The multi-layer contact lens for reinforcing color coating according to claim 1 or 2, wherein the coloring agent layer and the lens further comprise a composite upper protective layer. The multi-layer contact lens with enhanced color coating as described in claim 3, wherein the number of layers of the upper protective layer is plural.