KR102157738B1 - Plastic glasses frame having a color change function and the manufacturing method of the same - Google Patents

Abstract

The present invention relates to a plastic eyeglass frame having a discoloration function and a manufacturing method thereof, and more particularly, by a simple process by manufacturing an eyeglass frame by injection in a state in which a visual pigment whose color changes due to ultraviolet rays is mixed with a plastic resin. The present invention relates to a plastic spectacle frame having a discoloration function in which the discoloration function is not degraded or disappears even after prolonged use while making it possible to manufacture, and a method for manufacturing the same.
The present invention is characterized in that in an eyeglass frame having a color change function that changes color by exposure to ultraviolet rays, it is manufactured by injecting a mixture of a visual pigment solution dissolved in toluene or dichloromethane as a solvent, and a plastic resin. .

Description

Plastic glasses frame having a color change function and the manufacturing method of the same}

The present invention relates to a plastic eyeglass frame having a discoloration function and a manufacturing method thereof, and more particularly, by a simple process by manufacturing an eyeglass frame by injection in a state in which a visual pigment that changes color due to ultraviolet rays is mixed with a plastic resin. The present invention relates to a plastic spectacle frame having a discoloration function in which the discoloration function is not degraded or disappears even after prolonged use while making it possible to manufacture, and a method for manufacturing the same.

Recently, due to the development of communication technology such as smartphones, the number of students who wear glasses from a young age is increasing, and accordingly, the demand for glasses is steadily increasing.

In general, glasses may be classified into hand glasses for restoring vision, and sunglasses or goggles for protecting eyes from strong rays.

The spectacles as described above are composed of a lens and a spectacle frame to which the lens is combined, and the material of the spectacle frame is divided into plastic, that is, a synthetic resin material and a metal material.

Since the synthetic resin spectacle frame is manufactured through an injection mold, unlike metal spectacles, there is an advantage that it can be supplied inexpensively through mass production.

However, in the conventional synthetic resin eyeglass frames, the color is mixed with the material when injected through a mold to produce a colored synthetic resin eyeglass frame, and after injection molding a transparent or colorless synthetic resin eyeglass frame, various colors are sprayed to produce a colored synthetic resin eyeglass frame. do.

The synthetic resin spectacle frame manufactured by the above spectacle manufacturing method can provide a spectacle frame having one color or a mixture of two or more colors, but the spectacle frame cannot be changed except for the color initially formed when the spectacle frame is manufactured. There was a drawback of not overcoming the limit in directing the design of

In order to solve these shortcomings, eyeglass frames that change color reacting to ultraviolet rays have recently been developed, but the reaction time for changing color to ultraviolet rays is long, and the degree of discoloration is insignificant, so the actual product has not been released.

As a prior art for solving this problem, Korean Patent Laid-Open Publication No. 10-2011-0118217 discloses an eyeglass frame that quickly discolors by ultraviolet rays and a manufacturing method thereof, and the main technical configuration is to use a mold to make a synthetic resin eyeglass frame. It is characterized in that it is configured to produce eyeglass frames that are rapidly discolored by ultraviolet rays by a simple method of mixing and spraying lacquer, thinner, liquid color change pigment, powder color change pigment, and ultraviolet absorber after being manufactured by injection.

That is, the prior art is characterized in that it is possible to shorten the discoloration time due to UV exposure by mixing lacquer, thinner, liquid color change pigment, powder color change pigment, and ultraviolet absorber at a specific weight ratio and apply by spraying, Since the post-treatment process of the transparent coating layer forming step and the drying step must be accompanied, there is a disadvantage that a lot of time is required for the manufacturing process.

In addition, in the prior art, since the discoloration pigment is applied to the outside of the manufactured spectacle frame by a spray method, color change does not occur when the coating layer or the spray coating layer is peeled off due to external impact or long-term use. There are also problems such as impairing the aesthetics due to the natural discoloration.

1. Republic of Korea Patent Publication No. 10-2011-0118217 (published on October 31, 2011) 2. Korean Patent Publication No. 10-1098865 (announced on December 27, 2011)

The present invention was conceived to solve the problems of the prior art as described above, and an object of the present invention is a simple process by manufacturing a spectacle frame by injection in a state in which a visual pigment whose color changes due to ultraviolet rays is mixed with a plastic resin It is intended to provide a plastic eyeglass frame having a discoloration function that does not degenerate or disappear even in long-term use and a manufacturing method thereof.

In addition, in the present invention, a plastic eyeglass frame having a discoloration function can be manufactured by simply mixing the optical pigment master batch with a plastic resin and extruding or injection by mixing the optical pigment master batch with an easy handling and excellent dispersibility. There is another object to provide a manufacturing method that allows.

The present invention for achieving the above objects,

In the spectacle frame having a color change function that changes color by exposure to ultraviolet rays, it is characterized in that it is manufactured by injecting a mixture of a visual pigment solution dissolved in toluene or dichloromethane as a solvent and a plastic resin.

At this time, the optical pigment solution is characterized in that the master batch is mixed with the plastic resin.

On the other hand, the method of manufacturing a plastic eyeglass frame having a discoloration function according to the present invention,

A pigment dissolving step of dissolving a visual pigment using toluene or dichloromethane as a solvent, a mixing step of mixing the dissolved visual pigment with a plastic resin, and injection of an eyeglass frame to manufacture an eyeglass frame by injecting a mixture of the optical pigment and plastic resin It characterized in that it is configured including the step.

At this time, it is configured to further include a master batch manufacturing step of master-batching the optical pigment dissolved after the pigment dissolving step, and in the mixing step, the master-batched optical pigment is mixed with the plastic resin. .

In addition, the plastic resin is characterized in that the main component of the tritan (Tritan) resin.

According to the present invention, an eyeglass frame is manufactured by injection in a state in which the optical pigment solution is mixed with a plastic resin, so that the entire eyeglass frame is discolored when exposed to ultraviolet rays, thereby improving the appearance of the eyeglass frame.

In addition, according to the present invention, the optical pigment is master batched and mixed with the plastic resin to improve the dispersibility of the optical pigment mixed with the plastic resin, thereby making the discoloration of the eyeglass frame evenly and overall. It has an additional effect of greatly simplifying the manufacturing process of.

In addition, according to the present invention, it is possible to improve durability by using Tritan resin that is harmless to the human body as a material of the spectacle frame and does not have any risk of breaking, and does not easily generate a life such as scratches. Due to its transparent nature, it has an additional effect of clearly expressing the color change due to the light-emitting pigment.

1 is a perspective view showing a plastic eyeglass frame having a discoloration function according to the present invention.
Figure 2 is a flow chart showing the manufacturing process of the plastic eyeglass frame having a discoloration function according to the present invention.

Hereinafter, preferred embodiments of a plastic eyeglass frame having a color change function and a method of manufacturing the same according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a plastic eyeglass frame having a discoloration function according to the present invention, Figure 2 is a flow chart showing a manufacturing process of the plastic eyeglass frame having a discoloration function according to the present invention.

The present invention makes it possible to manufacture an eyeglass frame by injection in a state in which a visual pigment that changes color by ultraviolet rays is mixed with a plastic resin, so that it can be manufactured by a simple process and at the same time, the discoloration function is not degraded or disappeared even with long-term use. The present invention relates to a plastic eyeglass frame having a color change function and a method for manufacturing the same. First, the plastic eyeglass frame 100 having a color change function according to the present invention is manufactured using a mixture of a visual pigment and a plastic resin.

At this time, the photochromic pigment refers to a pigment that shows color when exposed to ultraviolet rays and disappears when ultraviolet rays are blocked. By mixing a photochromic pigment with a plastic resin used for manufacturing existing eyeglass frames Glasses frames manufactured by injection are configured to have a discoloration function.

In other words, in the conventional case, a plastic resin is injected to produce an eyeglass frame, and then a color change occurs only on the surface of the eyeglass frame by applying a light-emitting pigment to the surface through a spray, etc. By manufacturing the spectacle frame in a state in which a discoloration pigment is mixed with itself, it is possible to improve the durability by discoloring the entire spectacle frame, as well as to allow discoloration even when the surface of the spectacle frame is damaged by external impact. Thus, the overall appearance is configured to be more beautiful.

In more detail, as the light-emitting pigment, Spiropyrane-based pigment manufactured by BASF, Germany, is used, and the pigment is not discolored by ultraviolet rays alone, and is dissolved in a solvent such as toluene or dichloromethane, or When dissolved in a plastic resin, the color changes to gray by ultraviolet rays, and when ultraviolet rays are blocked, the color becomes transparent.

In addition, the pigment has passed EN-71, the European Children's Safety Standard, and has been proven to be harmless and non-toxic, and has excellent heat resistance.

On the other hand, the optical pigment is mixed with a plastic resin in the form of a solution dissolved in toluene or dichloromethane as a solvent. This is when a powdery optical pigment is mixed with a plastic resin and dissolved at a high temperature. Since there is a concern that the discoloration of the spectacle frame may not be uniformly achieved due to concentration in the eyeglass frame, the vision pigment can be more evenly distributed in the plastic resin by mixing the optical pigment in the plastic resin in a liquid state.

At this time, the optical pigment solution occupies 0.01 to 1.0% by weight of the total mixture, that is, the mixture of the optical pigment solution and the plastic resin.When the content of the optical pigment is less than 0.01% by weight, the color change due to UV exposure Almost no appear, and when the content of the optical pigment exceeds 1.0% by weight, there is a concern that the physical properties of the overall frame may be deteriorated.

In addition, it goes without saying that the degree of discoloration that occurs when exposed to ultraviolet rays varies according to the content of the optical pigment solution.

On the other hand, the optical pigment solution may be used as a master batch, which simplifies the manufacturing process of spectacle frames having a discoloration function, which will be described later, and improves dispersibility in the plastic resin. This is to ensure that the visual pigment can be evenly distributed within the plastic resin.

That is, the master batch is a molded product having a shape such as pellets obtained by concentrating and dispersing pigments and additives in a resin to improve dispersibility and colorability.In the present invention, by mixing a visual pigment solution with a resin to form a master batch. By mixing the master batch with plastic resin and injecting it, it is possible to manufacture spectacle frames having a discoloration function, and at the same time, the dispersibility of the visual pigment mixed with the plastic resin is improved so that the discoloration of the spectacle frame is made evenly. have.

At this time, the concentration of the optical pigment solution included in the master batch is about 20 to 70%, and the content of the master batch mixed with the plastic resin according to the concentration of the optical pigment solution is the cyan pigment solution in the above-described total mixture. The content may be adjusted to be 0.01 to 1.0% by weight.

In addition, it goes without saying that the master batch may contain other pigments or dyes for determining the color of the eyeglass frames in addition to the optical pigment solution.

Next, the plastic resin used as the material of the eyeglass frame, that is, the plastic resin mixed with the optical pigment solution or the master batch, includes polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), polyurethane (PU), and polystyrene. (PS), acrylonitrile butadiene styrene (ABS), nylon (Nylon), a thermoplastic resin such as acrylic (PMMA), or a mixture thereof may be generally used, but in the present invention, a Tritan resin is used.

That is, since the tritan resin does not contain bisphenol A, it is not only harmless to the human body because there is no concern for elution of environmental hormones, and it has excellent heat resistance as well as durability, so there is no fear of breaking, and it does not easily generate life-givers such as scratches There is an advantage.

In addition, since the tritan resin is transparent like glass, the color change due to the light-emitting pigment can be clearly expressed, and because of its excellent chemical resistance, it is not only difficult to adhere to contaminants such as stains, but is also light, so it is best used as a material for eyeglass frames. Will be appropriate.

At this time, it goes without saying that tritan resin and at least one of the aforementioned thermoplastic resins may be mixed and used as the plastic resin.

An embodiment of a spectacle frame 100 having a color change function according to the present invention configured as described above is shown in FIG. 1.

In the spectacle frame 100 shown in FIG. 1, in order to check the color change due to ultraviolet rays, the rim part 110 is injected using a tritan resin that does not contain an optical pigment solution or a master batch, and the leg part 120 ) Represents the state of exposing the combined product by injection to UV rays using a mixture of a light-emitting pigment solution or a master batch mixed with tritan resin, and the rim portion 110 is in a transparent state, whereas the leg It can be seen that the color of the portion 120 is beautifully discolored.

That is, if necessary, the entire eyeglass frame 100 including the rim portion 110 and the leg portion 120 is integrally injected using an optical pigment solution or a mixture in which a master batch is mixed with tritan resin. ) May be discolored by ultraviolet rays as a whole, and in the case of assembling the eyeglass frame 100 by injecting the rim portion 110 and the leg portion 120 respectively, one of the rim portion 110 and the leg portion 120 It can also be configured so that only parts are selectively discolored.

On the other hand, the manufacturing method of the spectacle frame having a discoloration function according to the present invention, as shown in Fig. 2, largely, the pigment dissolving step (S10), the master batch manufacturing step (S20), the mixing step (S30) and the spectacle frame injection step (S40) ), including.

In more detail, the pigment dissolving step (S10) relates to a step of preparing a visual pigment solution by dissolving a visual pigment, that is, a Spiropyrane-based pigment manufactured by BASF, in a solvent such as toluene or dichloromethane, In order to improve dispersibility when mixed with a plastic resin, a visual pigment is dissolved.

Next, the mixing step (S30) relates to a step of mixing the optical pigment solution obtained in the pigment dissolving step (S10) into a plastic resin, that is, a tritan resin or a mixed resin of a tritan resin and a thermosetting resin. By mixing the optical pigment solution with the plastic resin before injection of the eyeglass frame using plastic resin, the optical pigment is distributed over the entire eyeglass frame, not just the surface of the eyeglass frame, thereby minimizing the post-injection post-injection process to simplify the overall eyeglass frame manufacturing process. In addition, it is configured so that color change can be made even when the surface of the spectacle frame is damaged due to external impact, so that the overall appearance can be more beautiful.

On the other hand, according to another embodiment of the spectacle frame manufacturing method having a discoloration function according to the present invention, after the pigment dissolving step (S10) may be configured to further include a master batch manufacturing step (S20), the master batch manufacturing step (S20) relates to a step of preparing a master batch having a shape such as a pellet by mixing the optical pigment solution generated in the pigment dissolution step (S10) with a resin and then concentrating and dispersing it at a high concentration.

In other words, by mastering the light-emitting pigment solution generated in the pigment dissolving step (S10), the dispersibility of the light-emitting pigment in the plastic resin is improved, and storage and handling are facilitated, and the master batch is transferred to the plastic resin. Since the preparation for injection of the frame is completed only by the mixing process, it is configured to significantly shorten the manufacturing process of the frame having the overall discoloration function.

In the case of including the master batch manufacturing step (S20) as described above, in the mixing step (S30) described above, the master batch is mixed with the plastic resin instead of the optical pigment solution, and various concentrations of the optical pigment solution are changed. By manufacturing each type of master batch, it is possible to control the degree of color discoloration due to ultraviolet rays according to the type of master batch.

In addition, although the example in which the optical pigment solution is master-batched has been described above, the optical pigment in powder form may be directly master-batched, or by changing the type of the optical pigment included in the master batch, it is changed by ultraviolet rays. Of course, it is also possible to diversify the colors to be used.

Next, the spectacle frame injection step (S40) relates to a step of injecting an optical pigment or a mixture of a master batch and a plastic resin to manufacture a spectacle frame, which can be performed in the same manner as the process of manufacturing spectacle frames by conventional injection. Since there is a detailed description thereof will be omitted.

Therefore, according to the plastic spectacle frame having a discoloration function according to the present invention and the manufacturing method thereof as described above, the spectacle frame is manufactured by injection in a state in which an optical pigment solution is mixed with a plastic resin, so that the entire spectacle frame is discolored when exposed to ultraviolet rays. By making it possible to make the appearance of the eyeglass frames more beautiful, the dispersibility of the vision pigment mixed with the plastic resin is improved by mastering the optical pigment and mixing it with the plastic resin, and thus the discoloration of the eyeglass frame is evenly distributed. In addition to making it possible, the manufacturing process of the overall frame can be greatly simplified, and by using Tritan resin, which is harmless to the human body as the material of the frame, does not have the risk of being broken, and does not easily generate life-givers such as scratches. In addition to improving durability, it has various advantages, such as the ability to clearly express the color change due to the visual pigment due to the transparent properties such as glass.

The above-described embodiments have been described with respect to the most preferred examples of the present invention, but are not limited to the above embodiments, and the present invention can be applied to not only spectacle frames, but also sunglasses frames, within the scope not departing from the technical spirit of the present invention. It is obvious to those skilled in the art that various modifications are possible.

The present invention relates to a plastic eyeglass frame having a discoloration function and a manufacturing method thereof, and more particularly, by a simple process by manufacturing an eyeglass frame by injection in a state in which a visual pigment that changes color due to ultraviolet rays is mixed with a plastic resin. The present invention relates to a plastic spectacle frame having a discoloration function in which the discoloration function is not degraded or disappears even after prolonged use while making it possible to manufacture, and a method for manufacturing the same.

100: frame 110: rim portion
120: leg part
S10: pigment dissolution step S20: master batch manufacturing step
S30: Mixing step S40: Eyeglass frame injection step

Claims (5)

In the eyeglass frame having a color change function that changes color by exposure to ultraviolet rays,
Prepared by injecting a mixture of a master batch containing a Spiropyrane-based light pigment solution dissolved in toluene or dichloromethane at a concentration of 20 to 70% and a plastic resin,
Plastic eyeglass frames having a discoloration function, characterized in that the content of the optical pigment solution contained in the mixture of the master batch and the plastic resin is 0.01 to 1.0% by weight.
delete Pigment dissolving step of dissolving Spiropyrane-based light pigment using toluene or dichloromethane as a solvent,
A masterbatch manufacturing step of preparing a masterbatch containing a Spiropyrane-based optical pigment solution dissolved in the pigment dissolving step at a concentration of 20 to 70%,
Mixing step of mixing the master batch with a thermosetting resin containing tritan resin and
Consisting of including a spectacle frame injection step of injecting the mixture of the master batch and the thermosetting resin to manufacture spectacle frames,
In the master batch manufacturing step, a master batch is prepared by further including a pigment or dye for determining the color of the eyeglass frame,
In the mixing step, the amount of the master batch is adjusted so that the content of the Spiropyrane-based light pigment solution in the mixture of the master batch and the thermosetting resin is 0.01 to 1.0% by weight.
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