Electroplated color-changing lens and process for manufacturing same

Abstract

This invention relates to the field of lens technology, and particularly to electroplated photochromic lenses and their manufacturing process, comprising the following steps: Step 1: Pre-coating one side of a substrate 1; Step 2: Applying adhesive to the pre-treated surface of substrate 1 using a coating process; Step 3: Drying substrate 1 to obtain a substrate 1 with adhesive coating on one side; Step 4: Pre-coating one side of a substrate 2; Step 5: Applying photochromic adhesive to the pre-treated surface of substrate 2 using a coating process; Step 6: Drying substrate 2 to obtain a substrate 2 with photochromic adhesive coating on one side; Step 7: Pressing the substrate 1 with adhesive coating on one side, the electroplated film, and the substrate 2 with photochromic adhesive coating on one side together to obtain an electroplated photochromic lens. The beneficial effects of this invention are: an internal electroplated layer and optimized manufacturing process.

Description

Technical Field

[0001] This invention relates to the field of lens technology, specifically to an electroplated photochromic lens and its manufacturing process. Background Technology

[0002] Electroplated photochromic lenses are widely used in optical products such as sunglasses, sports goggles, and functional eyeglasses. The coating structure of existing electroplated photochromic lenses is typically as follows: Figure 1 As shown, from the outside to the inside, it includes an electroplated layer, a TAC or PC substrate layer, an adhesive layer, a TAC photochromic film, an adhesive layer, and a TAC or PC substrate layer. The electroplated layer is usually obtained by vacuum electroplating, in which the shaped lens is placed in a vacuum electroplating device in sheet form for electroplating. The TAC photochromic film is formed by dissolving the photochromic substance in the TAC material through a casting film technology.

[0003] The above-mentioned electroplated photochromic lenses have the following disadvantages in actual use: 1. The electroplating layer is located on the outermost layer of the lens, and its scratch resistance and seawater corrosion resistance are poor, resulting in a short lifespan of the electroplating layer; 2. Vacuum electroplating of sheet lenses is prone to uneven electroplating color and low efficiency; 3. TAC photochromic film has limited color and function, long production cycle and requires large-volume orders, which is not conducive to product diversification. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an electroplated photochromic lens and its manufacturing process, addressing the shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A process for preparing an electroplated photochromic lens includes the following steps: Step 1: Perform a coating pretreatment on one side of substrate 1; Step 2: Apply adhesive to the pretreated surface of substrate 1 using a coating process; Step 3: Dry the substrate to obtain a substrate with adhesive applied to one side; Step 4: Perform a coating pretreatment on one side of substrate 2; Step 5: Apply color-changing adhesive to the pretreated surface of substrate 2 using a coating process; Step 6: Dry the substrate 2 to obtain substrate 2 with color-changing adhesive coated on one side; Step 7: Press the substrate 1 with adhesive coating on one side, the electroplated film, and the substrate 2 with photochromic adhesive coating on one side together to obtain the electroplated photochromic lens.

[0006] A further provision of the present invention is that the color-changing adhesive is prepared by the following method: Step 1: Add the color-changing powder to the organic solvent at a ratio of 1-5% by weight, and stir until dissolved; Step 2: Add the solution obtained in Step 1 to the epoxy resin adhesive at a mass percentage of 10-50%, and stir for at least 30 minutes to obtain the color-changing epoxy resin adhesive. Step 3: Add the hindered amine light stabilizer to the color-changing epoxy resin at a ratio of 0.1-1.0% by mass, stir thoroughly and let stand for at least 30 minutes.

[0007] A further provision of the present invention is that the coating pretreatment includes the following steps: Step 1: Before powering on, set the parameters of the corona treatment equipment: set the frequency to 15-35KHZ, the voltage to 10-18KV, and the electrode gap to 1.0-1.5mm; Step 2: Start the equipment and wait for the corona discharge to stabilize. Then, pass substrate one or substrate two through the corona treatment electrode area at a linear speed of 10-50 m / min. Step 3: After corona treatment on one side of substrate 1 or substrate 2, rewind the substrate.

[0008] A further feature of this invention is that the adhesive is an epoxy resin adhesive with a viscosity of 50-3000 CPS.

[0009] A further feature of the present invention is that the substrate is a PC film or a TAC film.

[0010] A further feature of the present invention is that the second substrate is a PC film, a TAC film, or a TAC polarizing film.

[0011] A further feature of this invention is that the drying process is carried out in the oven of the coating machine, with the oven temperature set at 80-100℃ and the drying time at 5-10 minutes.

[0012] A further feature of this invention is that a roll film laminating machine is used in step seven.

[0013] The present invention also provides an electroplated photochromic lens, which is prepared by any of the above-described preparation methods and comprises, in sequence, a first substrate layer, an adhesive layer, an electroplated layer, a photochromic adhesive layer, and a second substrate layer, wherein the first substrate layer is a PC film or a TAC film, and the second substrate layer is a PC film, a TAC film, or a TAC polarizing film.

[0014] The present invention, possessing the above-mentioned features, incorporates an internal electroplating layer, achieving permanent protection for the electroplating layer and completely solving the problems of poor scratch resistance and seawater corrosion resistance of externally placed electroplating layers, thus extending the overall service life of the lens; it adopts a process of laminating the electroplated film with the substrate film, replacing the traditional vacuum electroplating process for sheet lenses, solving the problem of uneven electroplating color and improving production efficiency; and it uses a coated photochromic adhesive instead of a cast TAC photochromic film, solving the problems of limited color and function of TAC photochromic films, shortening the production cycle, and making it suitable for small-batch production.

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the electroplated photochromic lens according to an embodiment of the present invention. Detailed Implementation

[0017] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0018] A manufacturing process for electroplated photochromic lenses includes the following steps: Step 1: Perform a coating pretreatment on one side of substrate 1, which is a PC film or a TAC film; Step 2: Apply adhesive to the pretreated surface of substrate 1 using a coating process. The adhesive is an epoxy resin adhesive with a viscosity of 50-3000 CPS. Step 3: Dry the substrate to obtain a substrate with adhesive applied to one side; Step 4: Perform a coating pretreatment on one side of substrate 2, which is a PC film, a TAC film, or a TAC polarizing film; Step 5: Apply color-changing adhesive to the pretreated surface of substrate 2 using a coating process; Step 6: Dry the substrate 2 to obtain substrate 2 coated with color-changing adhesive on one side. The drying process is carried out in the oven of the coating machine. The oven temperature is set to 80-100℃ and the drying time is 5-10 minutes. Step 7: Press the substrate 1 with single-sided adhesive coating, the electroplated film, and the substrate 2 with single-sided photochromic adhesive coating to obtain the electroplated photochromic lens using a roll film laminating machine.

[0019] The coating pretreatment includes the following steps: Step 1: Before powering on, set the parameters of the corona treatment equipment: set the frequency to 15-35KHZ, the voltage to 10-18KV, and the electrode gap to 1.0-1.5mm; Step 2: Start the equipment and wait for the corona discharge to stabilize. Then, pass substrate one or substrate two through the corona treatment electrode area at a linear speed of 10-50 m / min. Step 3: After corona treatment on one side of substrate 1 or substrate 2, rewind the substrate.

[0020] The color-changing adhesive is prepared by the following method: Step 1: Add the color-changing powder to an organic solvent at a ratio of 1-5% by mass, and stir until dissolved. The organic solvent can be ethyl acetate, toluene, or methyl ethyl ketone. Step 2: Add the solution obtained in Step 1 to the epoxy resin adhesive at a mass percentage of 10-50%, and stir for at least 30 minutes to obtain the color-changing epoxy resin adhesive. Step 3: Add the hindered amine light stabilizer to the color-changing epoxy resin at a ratio of 0.1-1.0% by mass, stir thoroughly and let stand for at least 30 minutes.

[0021] An electroplated photochromic lens, prepared by the above-described method, such as... Figure 1 The structure includes, in sequence, a first substrate layer 1, an adhesive layer 2, an electroplated layer 3, a color-changing adhesive layer 4, and a second substrate layer 5. The first substrate layer is a PC film or a TAC film, and the second substrate layer is a PC film, a TAC film, or a TAC polarizing film.

Claims

1. A manufacturing process for electroplated photochromic lenses, characterized in that, Includes the following steps: Step 1: Perform a coating pretreatment on one side of substrate 1; Step 2: Apply adhesive to the pretreated surface of substrate 1 using a coating process; Step 3: Dry the substrate to obtain a substrate with adhesive applied to one side; Step 4: Perform a coating pretreatment on one side of substrate 2; Step 5: Apply color-changing adhesive to the pretreated surface of substrate 2 using a coating process; Step 6: Dry the substrate 2 to obtain substrate 2 with color-changing adhesive coated on one side; Step 7: Press the substrate 1 with adhesive coating on one side, the electroplated film, and the substrate 2 with photochromic adhesive coating on one side together to obtain the electroplated photochromic lens.

2. The manufacturing process of the electroplated photochromic lens according to claim 1, characterized in that: The color-changing adhesive is prepared by the following method: Step 1: Add the color-changing powder to the organic solvent at a ratio of 1-5% by weight, and stir until dissolved; Step 2: Add the solution obtained in Step 1 to the epoxy resin adhesive at a mass percentage of 10-50%, and stir for at least 30 minutes to obtain the color-changing epoxy resin adhesive. Step 3: Add the hindered amine light stabilizer to the color-changing epoxy resin at a ratio of 0.1-1.0% by mass, stir thoroughly and let stand for at least 30 minutes.

3. The manufacturing process of the electroplated photochromic lens according to claim 1, characterized in that: The coating pretreatment includes the following steps: Step 1: Before powering on, set the parameters of the corona treatment equipment: set the frequency to 15-35KHZ, the voltage to 10-18KV, and the electrode gap to 1.0-1.5mm; Step 2: Start the equipment and wait for the corona discharge to stabilize. Then, pass substrate one or substrate two through the corona treatment electrode area at a linear speed of 10-50 m / min. Step 3: After corona treatment on one side of substrate 1 or substrate 2, rewind the substrate.

4. The manufacturing process of the electroplated photochromic lens according to claim 1, characterized in that: The adhesive is an epoxy resin adhesive with a viscosity of 50-3000 CPS.

5. The manufacturing process of the electroplated photochromic lens according to claim 1, characterized in that: The substrate is either a PC film or a TAC film.

6. The manufacturing process of the electroplated photochromic lens according to claim 1, characterized in that: The second substrate is a PC film, a TAC film, or a TAC polarizing film.

7. The manufacturing process of the electroplated photochromic lens according to claim 1, characterized in that: The drying process is carried out in the oven of the coating machine, with the oven temperature set at 80-100℃ and the drying time at 5-10 minutes.

8. The manufacturing process of the electroplated photochromic lens according to claim 1, characterized in that: Step seven uses a roll film laminating machine.

9. An electroplated photochromic lens, characterized in that: The electroplated photochromic lens is prepared by the preparation method according to any one of claims 1-8, and includes, in sequence, a first substrate layer, an adhesive layer, an electroplated layer, a photochromic adhesive layer, and a second substrate layer, wherein the first substrate layer is a PC film or a TAC film, and the second substrate layer is a PC film, a TAC film, or a TAC polarizing film.

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