A molding process for the side and end faces of an optical component

Abstract

The present application relates to the field of display panels, and more specifically, it relates to a molding process for the sides and end faces of an optical component. The optical component includes a component body, a first light-blocking ink layer is provided on the four edges of the upper surface of the component body, and a second light-blocking ink layer is provided on the three side end faces of the component body; the component body is a light guide plate, a light guide film, a diffusion plate or a light-enhancing plate; the first light-blocking ink layer is made of black-gray light-blocking ink after coating and curing, and the second light-blocking ink layer is made of white-gray light-blocking ink after coating and curing. The optical component prepared by the present application can prevent the light source from leaking from the three sides except the light incident side, and can prevent the light source from leaking from the upper edge of the optical component. The display panel prepared by the encapsulation is not prone to the problem of bright edges and bright lines around the edges, which reduces light leakage and light loss and improves the utilization rate of light energy.

Description

Technical Field

[0001] The present application relates to the field of display panels, and more specifically, to a molding process for the side and end faces of an optical component. Background Art

[0002] The display panel is composed of backlight, light guide plate, diffuser, plastic frame, module panel and other components. A gap is usually reserved around the assembly of the light guide plate and the plastic frame to prevent deformation or warping due to the expansion and contraction of the light guide plate during the reliability test. However, the assembly process with this reserved gap will cause the light loss on the side of the light guide plate and the reflected light from the plastic frame to form a concentrated light at the gap position. In addition, the current panel display tends to have a narrow frame design, and the shading area around the backlight source will be relatively reduced, which will cause bright edges and bright lines around the backlight source and the module panel display, affecting the normal use of the display panel. Summary of the invention

[0003] In order to solve the problem of bright edges and bright lines appearing around the backlight source and the module panel display, the present application provides a molding process for the side and end faces of an optical component.

[0004] In the first aspect, the present application provides a molding process for the side and end faces of an optical component, which adopts the following technical solution:

[0005] A molding process for the side and end faces of an optical component comprises the following steps:

[0006] Take a clean component body, apply black-gray light-blocking ink on the sides of the upper surface of the component body, and after curing, form a first light-blocking ink layer on the sides of the upper surface of the component body;

[0007] White ash light-blocking ink is applied to the end faces of the three sides of the component body except the light-incoming side, and after curing, a second light-blocking ink layer is formed on the end faces of the three sides of the component body to obtain an optical component.

[0008] Preferably, in the preparation of the first light-blocking ink layer, the black-gray light-blocking ink can be applied by screen printing, spray printing, embossing or coating, and the curing treatment is carried out at an ambient pressure of -0.05 to -0.12 MPa and an ambient temperature of 80 to 100° C. for 50 to 60 minutes;

[0009] In the preparation of the second light-blocking ink layer, the white-gray light-blocking ink can be applied by spraying or coating, and the curing treatment is carried out at an ambient pressure of -0.05 to -0.12 MPa and an ambient temperature of 80-100° C. for 50-60 minutes.

[0010] By applying black-gray light-blocking ink on the sides around the upper surface of the component body, a first light-blocking ink layer with a black-edge structure can be directly formed on the sides around the upper surface of the component body. Similarly, by applying white-gray light-blocking ink on the other three side end faces of the component body except the light-incoming side, a second light-blocking ink layer can be directly formed on the three side end faces of the component body, so that the optical component itself has the function of blocking light. In the process of packaging the optical component to prepare the display panel, there is no need to add an additional glue frame or light-blocking component to block the light source from leaking out from the sides around. The problem of bright lines on both sides caused by deformation or warping of the optical component due to expansion and contraction and incomplete fitting with the glue frame during the packaging process is solved. In addition, the three side end faces of the component body can reflect the light source, reduce the loss of the light source, make the light emitting surface light evenly emitted, and improve the light energy utilization rate of the optical component.

[0011] Among them, the width of the first light-blocking ink layer in the optical component is smaller than the width of the backlight transition area, which can achieve an ultra-narrow frame effect of the display panel.

[0012] In addition, a variety of application methods can be used to evenly coat the surface and side end faces of the component body with light-blocking ink, and it can be cured in a high-temperature negative pressure environment, thereby reducing the impact of over-high-temperature curing on the optical component's own material and ink quality, and achieving high stability.

[0013] Among them, the inkjet printing is to install the inkjet printer on the assembly line. After the component body is cut and polished, and before the light-emitting external inspection, the light guide plate is sprayed with black-gray light-blocking ink and white-gray light-blocking ink on the assembly line. The embossing process is to transfer the film (substrate layer, release layer, first light-blocking ink layer, adhesive layer) adhered to the first light-blocking ink layer to the edges of the upper surface of the component body, specifically, to emboss one side of the adhesive layer of the first light-blocking ink layer onto the component body. Similarly, the film (substrate layer, release layer, second light-blocking ink layer, adhesive layer) adhered to the second light-blocking ink layer is transferred to the end faces of the three sides of the component body, specifically, to emboss one side of the adhesive layer of the second light-blocking ink layer onto the component body.

[0014] Preferably, the black-gray light-blocking ink comprises the following raw materials in parts by weight: 50-65 parts of water-based polyurethane resin, 20-25 parts of filler, 5-6 parts of dispersant, 3-5 parts of defoaming agent, 1-5 parts of leveling agent, 0.5-1.5 parts of light stabilizer, and 45-55 parts of water; the filler is a mixture of 2-4 parts of carbon black, 5-7 parts of graphite, 0.5-1.2 parts of copper fluoride, and 1-2 parts of calcium sulfide.

[0015] Preferably, the white gray light-blocking ink comprises the following raw materials in parts by weight: 50-65 parts of water-based polyurethane resin, 30-40 parts of filler, 5-8 parts of dispersant, 3-5 parts of defoaming agent, 1-3 parts of leveling agent, 0.3-1.2 parts of light stabilizer, and 40-50 parts of water; the filler is calcium carbonate and / or titanium dioxide.

[0016] The white-gray light-blocking ink and the black-gray light-blocking ink prepared by adopting the above-mentioned technical scheme have excellent castability, can be evenly coated on the side of the component body, are not prone to bubbling, and the formed ink layer can block the light sources on the three sides of the component body. The ink layer is not prone to cracking after long-term illumination by the light source. The light-colored ink of the white-gray light-blocking ink layer will not absorb the light source and is not light-transmissive. It can block the light source from being emitted from the three side ends, and can make the light source evenly emitted from the upper surface of the component body, reducing the loss caused by the light source being emitted through the three side ends. The black-gray light-blocking ink layer can block the light source from leaking from the sides of the component body, thereby preventing bright edges and bright lines from appearing around the optical component.

[0017] Preferably, the waterborne polyurethane resin is prepared by the following steps:

[0018] Mix diol and diisocyanate, raise the temperature to 80-90°C, keep the temperature for 60-120h, cool to 40-50°C, add chain extender, crosslinker and catalyst, raise the temperature to 70-80°C, keep the temperature for 2-4h, and obtain the first prepolymer;

[0019] After cooling the first prepolymer to 40-50° C., adding a silane coupling agent and polytetrafluoroethylene, and keeping the temperature for 5-20 minutes, a second prepolymer is obtained;

[0020] The second prepolymer is cooled to 10-20° C., then a salt-forming agent is added for neutralization, and distilled under reduced pressure to obtain a waterborne polyurethane resin.

[0021] By adopting the above-mentioned technical scheme to control the amount of polytetrafluoroethylene added, the wear resistance of the polyurethane resin can be improved, so that the prepared water-based polyurethane resin has excellent compatibility, adhesion, wear resistance and high temperature resistance, and can be evenly dispersed with other materials in the ink. The prepared water-based ink can be evenly coated on the surface and sides of the component body, adhere stably, and will not cause corrosion and other damage to the component body. After being exposed to a light source for a long time, the ink layer is not prone to cracking, abrasion, and shedding, thereby avoiding the influence of the light-blocking performance due to cracking, abrasion or shedding of the ink layer.

[0022] Preferably, the diol is a mixture of polycarbonate diol and polycaprolactone diol in a weight ratio of 1:(2-4); the diisocyanate is at least one of toluene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate and dicyclohexyl diisocyanate.

[0023] By adopting the above technical scheme, the polyurethane resin obtained by the reaction can have excellent flexibility, adhesion and wear resistance, and can be evenly and stably coated on the surface of the component body. In the process of optical component packaging to prepare the display panel, the ink layer can also slightly deform with the expansion and contraction of the optical component, and it is not easily worn by adjacent abutting components during the assembly process and use, and the ink layer will not be separated from the component body, and it is highly stable.

[0024] Preferably, the chain extender is composed of dimethylolpropionic acid, 1,4-butanediol and ethylene glycol mixed in a weight ratio of (2-3): (1.5-2.5): 1; the crosslinking agent is trimethylolpropane; and the catalyst is one of dibutyltin dilaurate, stannous octoate and tin catalyst T-12.

[0025] By adopting the above technical scheme, the reaction of diol and diisocyanate can be promoted, and the chain can be stably extended to generate polyurethane resin, and the reaction process is stable.

[0026] Preferably, the silane coupling agent is at least one of γ-glycidyloxypropyltrimethoxysilane, vinyltriethoxysilane and vinyltri(β-methoxyethoxy)silane; and the salt-forming agent is triethylamine.

[0027] By adopting the above technical scheme, the compatibility of water-based polyurethane resin with other materials in ink can be improved, and the compatibility and bonding of ink with the surface of the component body can be improved, thereby improving the adhesion of ink and making it less likely for the optical component to crack or fall off after being exposed to light for a long time.

[0028] Preferably, the mixing weight ratio of the first prepolymer, the silane coupling agent and the polytetrafluoroethylene is (12-15):(2-3):1.

[0029] By controlling the amount of polytetrafluoroethylene used, the compatibility modification of the first prepolymer can be improved, so that the wear resistance and aging resistance of the prepared polyurethane resin can be improved while maintaining stable adhesion, so that the first light-blocking ink layer and the second light-blocking ink layer formed by the optical component are not prone to photothermal aging and shedding under long-term light irradiation and photoheat generation.

[0030] Preferably, the filler is a modified filler, which is prepared by modification through the following steps:

[0031] By adopting the above technical scheme, the polytetrafluoroethylene in the filler is made similarly compatible with the polytetrafluoroethylene in the water-based polyurethane resin, thereby improving the dispersion compatibility of the filler and the water-based polyurethane resin, and the rosin resin can improve the adhesion of the filler, so that the prepared black-gray light-blocking ink and white-gray light-blocking ink can be stably adhered to the component body and are not easily worn or separated from the optical component and fall off.

[0032] Preferably, the dispersant is at least one of polyvinyl alcohol, polyvinyl pyrrolidone and polyacrylic acid; the defoamer is a polyether block defoamer and / or a silicone defoamer; and the leveling agent is an acrylic leveling agent and / or a silicone leveling agent.

[0033] By adopting the above technical scheme, the material dispersibility and coating leveling property of black-gray light-blocking ink and white-gray light-blocking ink can be improved, so that the formed ink layer is free of bubbles and the like, and the light-blocking effect of bubbles on the ink layer is reduced.

[0034] Preferably, the light stabilizer is light stabilizer 1084 and / or light stabilizer AM-101.

[0035] By using the above-mentioned light stabilizer, the stability of the first light-blocking ink layer and the second light-blocking ink layer can be improved, and the optical component is not prone to light aging and shedding of the ink layer after being exposed to light for a long time.

[0036] In a second aspect, the present application provides an optical component, which adopts the following technical solution:

[0037] An optical component comprises a component body, wherein a first light-blocking ink layer is arranged on the four edges of the upper surface of the component body, and a second light-blocking ink layer is arranged on the three side surfaces of the component body; the component body is a light guide plate, a light guide film, a diffusion plate or a light-enhancing plate; the first light-blocking ink layer is made by coating and then curing black-gray light-blocking ink, and the second light-blocking ink layer is made by coating and then curing white-gray light-blocking ink.

[0038] In summary, this application has the following beneficial effects:

[0039] 1. The present application sets a first light-blocking ink layer on the edges of the upper surface of the component body. In the process of encapsulating the optical component to prepare the display panel, no additional glue frame or light-blocking component is required to block the light source from leaking from the sides. This can reduce the light leakage from the upper edge of the optical component. The display panel obtained by the encapsulation is not prone to bright edge and bright line problems, which reduces light leakage and light loss.

[0040] 2. At the same time, a second light-blocking ink layer is arranged on the end faces of the three sides of the component body to reflect the light source, reduce the loss of the light source, make the light source on the light-emitting surface emit light evenly, and improve the light energy utilization of the optical component;

[0041] 3. The present application can adjust the wear resistance and aging resistance of the ink layer by introducing polytetrafluoroethylene into the water-based polyurethane resin, and improve the compatibility of the filler with the water-based polyurethane by modifying the rosin resin and polytetrafluoroethylene, and improve the adhesion of the ink layer on the component body, making it less susceptible to light, heat, aging, separation, and wear.

[0042] 4. This application can use a variety of application methods such as silk screen printing, spray printing, embossing or coating to evenly apply light-blocking ink on the surface and side end faces of the component body, and cure it in a high-temperature negative pressure environment, thereby reducing the impact of excessively high-temperature curing on the material of the optical component itself and the quality of the ink, and having high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the structure of the optical component described in this application.

[0044] Figure numerals: 1. component body; 2. first light-blocking ink layer; 3. second light-blocking ink layer. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1 The present application is further described in detail with reference to the accompanying drawings.

[0046] Preparation Example of Waterborne Polyurethane Resin

[0047] Preparation Example 1

[0048] A waterborne polyurethane resin is prepared by the following steps:

[0049] Mix equal molar amounts of diol and diphenylmethane diisocyanate, heat to 80°C, keep warm for 120 hours, cool to 40°C, add 0.5% chain extender, 1% trimethylolpropane and 0.3% tin catalyst T-12, heat to 70°C,

[0050] Keep warm for 4 hours to obtain the first prepolymer;

[0051] After cooling the first prepolymer to 40° C., 1% vinyl tri(β-methoxyethoxy)silane and 0.5% polytetrafluoroethylene were added and kept warm for 20 minutes to obtain a second prepolymer;

[0052] The second prepolymer was cooled to 10° C., and then 0.5% triethylamine was added for neutralization, and distilled under reduced pressure to obtain a waterborne polyurethane resin.

[0053] The diol is composed of a mixture of polycarbonate diol and polycaprolactone diol in a weight ratio of 1:2;

[0054] The chain extender is composed of dimethylol propionic acid, 1,4-butanediol and ethylene glycol mixed in a weight ratio of 2:2.5:1.

[0055] Preparation Example 2

[0056] Equimolar amounts of diol and isophorone diisocyanate were mixed, and the temperature was raised to 85° C., kept warm for 90 hours, and then cooled to 45° C., and a total amount of 0.8% of a chain extender, 1.3% of trimethylolpropane and 0.5% of dibutyltin dilaurate were added, and the temperature was raised to 75° C., and kept warm for 3 hours to obtain a first prepolymer;

[0057] After cooling the first prepolymer to 45° C., 1.5% of vinyl triethoxysilane and 1% of polytetrafluoroethylene were added and kept warm for 10 minutes to obtain a second prepolymer;

[0058] The second prepolymer was cooled to 15° C., and then 0.8% triethylamine was added for neutralization, and distilled under reduced pressure to obtain a waterborne polyurethane resin.

[0059] The diol is composed of a mixture of polycarbonate diol and polycaprolactone diol in a weight ratio of 1:3;

[0060] The chain extender is composed of dimethylol propionic acid, 1,4-butanediol and ethylene glycol mixed in a weight ratio of 2.5:2:1.

[0061] Preparation Example 3

[0062] Equimolar amounts of diol and hexamethylene diisocyanate were mixed, and the temperature was raised to 90° C., kept warm for 60 hours, and then cooled to 50° C., and then 1% of a chain extender, 1.5% of trimethylolpropane and 0.8% of stannous octoate were added, and the temperature was raised to 80° C., and kept warm for 2 hours to obtain a first prepolymer;

[0063] After cooling the first prepolymer to 50° C., 2% of γ-glycidyloxypropyltrimethoxysilane and 1% of polytetrafluoroethylene were added, and the temperature was kept for 5 minutes to obtain a second prepolymer;

[0064] The second prepolymer was cooled to 20° C., and then 1.0% triethylamine was added for neutralization, and distilled under reduced pressure to obtain a waterborne polyurethane resin.

[0065] The diol is composed of a mixture of polycarbonate diol and polycaprolactone diol in a weight ratio of 1:4; the chain extender is composed of a mixture of dimethylol propionic acid, 1,4-butanediol and ethylene glycol in a weight ratio of 3:1.5:1.

[0066] Example

[0067] Example 1

[0068] A side and end surface molding process of an optical component comprises the following steps:

[0069] Take a clean component body, which is a light guide plate, a light guide film, a diffuser plate or a light enhancement plate. In this embodiment, a light guide plate is used as an example, and the refractive index of the light guide plate is 1.52 and the size is 10cm*20cm. Black gray light blocking ink is applied on the edges of the upper surface by spraying, and the spraying amount is 5g / cm 2 After spraying, the coating is cured for 560 minutes at an ambient pressure of -0.05MPa and an ambient temperature of 80°C to form a first light-blocking ink layer, and the width of the first light-blocking ink layer is smaller than the light source in the cross-lighting area of ​​the backlight source; and a white ash light-blocking ink layer is applied to the end surfaces of the three sides of the light guide plate by roller coating, and the application amount is 3g / cm 2 Then, the ink is cured for 60 minutes at an ambient pressure of -0.05 MPa and an ambient temperature of 90° C. to form a second light-blocking ink layer.

[0070] Among them, the black-gray light-blocking ink includes the following raw materials: 50g of water-based polyurethane resin, 20g of black-gray filler (4g of carbon black, 10g of graphite, 2g of copper fluoride, 4g of calcium sulfide), 5g of polyvinyl alcohol, 5g of polyether block defoamer, 3g of acrylic leveling agent, 0.5g of light stabilizer 1084, and 50g of water.

[0071] The white lime light-blocking ink includes the following raw materials: 50g of water-based polyurethane resin, 40g of white lime filler (20g of calcium carbonate, 20g of titanium dioxide), 5g of dispersant, 3g of defoaming agent, 1g of leveling agent, 0.8g of light stabilizer and 40g of water.

[0072] Example 2-3

[0073] The difference between Example 2-3 and Example 1 is that the ink parameters applied to the edges around the upper surface of the light guide plate and the end surfaces of the three sides are different, see Table 1 below for details:

[0074] Table 1 Optical component preparation parameters of Examples 1-3

[0075]

[0076]

[0077]

[0078] Example 5

[0079] The difference between this embodiment and the above-mentioned embodiment 2 is that the black-gray filler in the black-gray light-blocking ink and the white-gray filler in the white-gray light-blocking ink are both modified, and the steps of modifying the black-gray filler are as follows:

[0080] Add 20g of filler (4g of carbon black, 10g of graphite, 2g of copper fluoride, 4g of calcium sulfide), 2g of silane coupling agent, and 5g of rosin resin to 35g of 70% ethanol aqueous solution, and stir at 40°C for 25min; then add 1g of polytetrafluoroethylene and ultrasonically stir at 53°C for 20min to obtain modified black ash filler.

[0081] The steps of lime filler modification are as follows:

[0082] Add 40g of filler (20g of calcium carbonate, 20g of titanium dioxide), 4g of silane coupling agent, and 10g of rosin resin to 70g of 70% ethanol aqueous solution, and stir at 45°C for 20min; then add 5g of polytetrafluoroethylene and ultrasonically stir at 58°C for 15min to obtain modified lime filler.

[0083] Example 6

[0084] The difference between this embodiment and the above-mentioned embodiment 2 is that the black-gray filler in the black-gray light-blocking ink and the white-gray filler in the white-gray light-blocking ink are both modified, and the steps of modifying the black-gray filler are as follows:

[0085] Add 25g of filler (4g of carbon black, 10g of graphite, 2g of copper fluoride, 4g of calcium sulfide), 2g of silane coupling agent, and 5g of rosin resin to 35g of 70% ethanol aqueous solution, and stir at 45°C for 25min; then add 1g of polytetrafluoroethylene and ultrasonically stir at 55°C for 15min to obtain modified black ash filler.

[0086] The steps of lime filler modification are as follows:

[0087] Add 40g of filler (20g of calcium carbonate, 20g of titanium dioxide), 12g of silane coupling agent, and 20g of rosin resin to 60g of 70% ethanol aqueous solution, and stir at 50°C for 20min; then add 2g of polytetrafluoroethylene and stir ultrasonically at 53°C for 20min to obtain modified lime filler.

[0088] Implementation comparison

[0089] Comparative Example 1

[0090] The difference between comparative example 1 and example 1 is that the first light-blocking ink layer is not provided on the edges around the upper surface of the component body.

[0091] Comparative Example 2

[0092] The difference between comparative example 2 and example 1 is that no second light-blocking ink layer is provided on the end surfaces of the three sides of the component body.

[0093] Application Examples

[0094] Application Examples 1-6

[0095] Application examples 1-6 correspond to using the light guide plate prepared in embodiments 1-6 and assembling it with a plastic frame to prepare a display panel.

[0096] Application Comparative Example 1

[0097] Application of Comparative Example 1 The light guide plate prepared in Comparative Example 1 is assembled with a rubber frame to prepare a display panel.

[0098] Performance testing

[0099] The light guide plates prepared in the above-mentioned embodiments 1-6 were subjected to adhesion test, light resistance test and heat resistance test of the first light-blocking ink layer and the second light-blocking ink layer. The test steps and results are as follows:

[0100] Test (I) Adhesion test

[0101] Draw 6*6 small grids of 1mm×1mm along the edges of the upper surface of the light guide plate and the extension direction of the side end faces, and then cover the edges of the upper surface of the light guide plate and the side end faces with the adhesive surface of the transparent tape. Use a force of 2kg to roll back and forth along the area covered by the transparent tape twice, and then tear off the transparent tape at a peeling angle of 90°. Weigh the weight difference before and after the transparent tape is adhered, which is the weight of the ink layer peeled off from the first light-blocking ink layer and the second light-blocking ink layer.

[0102] Test (II): Lightfastness test

[0103] The light guide plates prepared in Examples 1-6 were placed in an ultraviolet aging test box at a temperature of 60° C. and a wavelength of 350 nm for 500 h, then taken out, and the weight difference before and after the transparent tape was attached was measured according to the steps of the above test (I).

[0104] Test (III): Heat resistance test

[0105] The light guide plates prepared in Examples 1-6 were placed in a constant temperature test box at 90° C. for 500 h, then taken out, and the weight difference before and after the transparent tape was attached was measured according to the steps of the above test (I).

[0106] Table 2 Light guide plate performance test data of Examples 1-6

[0107]

[0108]

[0109] (You can rub it again with 50 g sandpaper and 2 kg force)

[0110] It can be seen from the above data that Examples 2-6 are coated with the black-gray light-blocking ink and the white-gray black-gray light-blocking ink prepared in this application, and have good coating adhesion with the light guide plate, are not easy to wear and scratch and fall off, and are stable in light and heat resistance. After long-term use, the optical components are not easily affected by light and heat and the adhesion decreases and the coating falls off. Among them, Examples 5-6 use the modified filler, and the weight difference of the transparent tape is significantly reduced, indicating that the modified filler added to the ink can improve the adhesion of the ink.

[0111] Secondly, the above application examples 1-6 and application comparison examples 1-2 were placed in a black box and illuminated with a light intensity of 10000 LUX to observe whether there were bright edges and bright lines on the edge of the display screen, and the light intensity of the light emitting surface was tested. The test data are as follows:

[0112] Table 3 Brightness of light-emitting surface of application examples 1-6 and comparative examples 1-2

[0113] Test items Bright edge and bright line situation Light intensity at light output / LUX Application Example 1 No bright edge or bright line 9810 Application Example 2 No bright edge or bright line 9820 Application Example 3 No bright edge or bright line 9840 Application Example 4 No bright edge or bright line 9860 Application Example 5 No bright edge or bright line 9920 Application Example 6 No bright edge or bright line 9950 Application Comparative Example 1 The long side edges have bright lines 9610 Application Comparative Example 2 No bright edge or bright line 8810

[0114] By comparing Application Examples 1-6 with Application Comparison Example 1, it can be seen that the present application arranges a first light-blocking ink layer on the edges around the upper surface of the component body, so that the edges around the upper surface of the component body themselves have light-blocking characteristics, and there is no bright edge or bright line phenomenon on the edges when the light source is used; and a second light-blocking ink layer is arranged on the end faces of the three sides, which can reduce the leakage of the light source from the side end faces, so that the optical component can achieve the effect of preventing light leakage and light loss.

[0115] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A molding process for the side and end faces of an optical component, characterized in that: The steps include: Take a clean component body, apply black-gray light-blocking ink on the sides of the upper surface of the component body, and after curing, form a first light-blocking ink layer on the sides of the upper surface of the component body; White ash light-blocking ink is applied to the three side end surfaces of the component body except the light-incoming side, and after curing, a second light-blocking ink layer is formed on the three side end surfaces of the component body, thereby obtaining an optical component; The component body is a light guide plate, a light guide film, a diffusion plate or a light enhancement plate; The black-gray light-blocking ink comprises the following raw materials in parts by weight: 50-65 parts of water-based polyurethane resin, 20-25 parts of filler, 5-6 parts of dispersant, 3-5 parts of defoamer, 1-5 parts of leveling agent, 0.5-1.5 parts of light stabilizer, and 45-55 parts of water; each part of the filler is composed of carbon black, graphite, copper fluoride, and calcium sulfide mixed in a weight ratio of (2-4): (5-7): 1: (1-2); The white gray light-blocking ink comprises the following raw materials in parts by weight: 50-65 parts of waterborne polyurethane resin, 30-40 parts of filler, 5-8 parts of dispersant, 3-5 parts of defoamer, 1-3 parts of leveling agent, 0.3-1.2 parts of light stabilizer, and 40-50 parts of water; the filler is calcium carbonate and / or titanium dioxide.

2. The process for forming the side and end faces of an optical component according to claim 1, characterized in that: In the preparation of the first light-blocking ink layer, the black-gray light-blocking ink can be applied by screen printing, spray printing, embossing or coating, and the curing treatment is carried out at an ambient pressure of -0.08~-0.05MPa and an ambient temperature of 80-100°C for 50-60min; In the preparation of the second light-blocking ink layer, the white-gray light-blocking ink can be applied by spraying or coating, and the curing treatment is carried out at an ambient pressure of -0.08~-0.05MPa and an ambient temperature of 80-100°C for 50-60min.

3. The process for forming the side and end faces of an optical component according to claim 1, characterized in that: The waterborne polyurethane resin is prepared by the following steps: Mixing diol with an equal molar amount of diisocyanate, heating to 80-90°C, keeping the temperature for 60-120 hours, cooling to 40-50°C, adding a chain extender, a crosslinking agent and a catalyst, heating to 70-80°C, keeping the temperature for 2-4 hours, and obtaining a first prepolymer; After cooling the first prepolymer to 40-50° C., adding a silane coupling agent and polytetrafluoroethylene, and keeping the temperature for 5-20 minutes, a second prepolymer is obtained; The second prepolymer is cooled to 10-20° C., then a salt-forming agent is added for neutralization, and distilled under reduced pressure to obtain a waterborne polyurethane resin.

4. The process for forming the side and end faces of an optical component according to claim 3, characterized in that: The diol is a mixture of polycarbonate diol and polycaprolactone diol in a weight ratio of 1:(2-4); the diisocyanate is at least one of toluene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate and dicyclohexyl diisocyanate; The chain extender is composed of dimethylolpropionic acid, 1,4-butanediol and ethylene glycol in a weight ratio of (2-3): (1.5-2.5): 1; the crosslinking agent is trimethylolpropane; and the catalyst is one of dibutyltin dilaurate, stannous octoate and tin catalyst T-12.

5. The process for forming the side and end faces of an optical component according to claim 3, characterized in that: The silane coupling agent is at least one of γ-glycidyloxypropyltrimethoxysilane, vinyltriethoxysilane and vinyltri(β-methoxyethoxy)silane; the mixing weight ratio of the first prepolymer, the silane coupling agent and polytetrafluoroethylene is (12-15):(2-3):1; and the salt-forming agent is triethylamine.

6. The process for forming the side and end faces of an optical component according to claim 1, characterized in that: The filler is a modified filler, which is prepared by modification through the following steps: 20-25 parts by weight of filler, 2-6 parts by weight of silane coupling agent and 5-10 parts by weight of rosin resin are added to 35-40 parts by weight of ethanol aqueous solution, and stirred at a temperature of 40-50° C. for 20-25 minutes; then 1-2.5 parts by weight of polytetrafluoroethylene are added, and ultrasonic stirring is performed at a temperature of 53-58° C. for 15-20 minutes to obtain a modified filler.

7. The process for forming the side and end faces of an optical component according to claim 1, characterized in that: The dispersant is at least one of polyvinyl alcohol, polyvinyl pyrrolidone and polyacrylic acid; the defoamer is a polyether block defoamer and / or a silicone defoamer; the leveling agent is an acrylic leveling agent and / or a silicone leveling agent; the light stabilizer is light stabilizer 1084 and / or light stabilizer AM-101.

8. An optical component obtained by the molding process according to any one of claims 1 to 7, characterized in that: It comprises a component body, wherein the edges around the upper surface of the component body are provided with a first light-blocking ink layer, and the end faces of the three sides of the component body are provided with a second light-blocking ink layer; the component body is a light guide plate, a light guide film, a diffusion plate or a light-enhancing plate.

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