CN110962484A - Silk-screen printing process for processing acrylic light guide plate - Google Patents
Silk-screen printing process for processing acrylic light guide plate Download PDFInfo
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- CN110962484A CN110962484A CN201911219892.3A CN201911219892A CN110962484A CN 110962484 A CN110962484 A CN 110962484A CN 201911219892 A CN201911219892 A CN 201911219892A CN 110962484 A CN110962484 A CN 110962484A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/12—Stencil printing; Silk-screen printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/101—Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09D11/107—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
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Abstract
The invention discloses a silk-screen process for processing an acrylic light guide plate, which relates to the technical field of chemical industry, and comprises the steps of selecting a screen plate and a screen frame, and installing the screen frame and the screen plate; coating photosensitive glue on the screen printing screen plate, and then drying the plate under a cold light lamp; adjusting the placing angles of the yellow screen plate, the magenta screen plate, the cyan screen plate and the black screen plate for printing; curing and drying the printing layer; the first three prints were checked for pattern color, sharpness and moire. According to the process provided by the invention, the yellow screen plate, the magenta screen plate, the cyan screen plate and the black screen plate sequentially deviate from proper angles clockwise, so that printed patterns cannot generate moire patterns, and the viscosity of the generated ink is proper according to a scientific mixing ratio; and the pre-polymerization is performed by matching with the short-time high-power ultraviolet irradiation, so that the pattern deformation caused by halation and scattering of the printing ink on the acrylic surface layer can be prevented, and the uneven color and the insecure coloring in the printing process of the printing ink are improved.
Description
Technical Field
The invention relates to the technical field of silk-screen processes, in particular to a silk-screen process for processing an acrylic light guide plate.
Background
In the 60 s of the 20 th century, the first liquid crystal display screen in the world was born, and then the liquid crystal display screen was widely used. Liquid crystal displays are then used in calculators, electronic watches, medical instruments, and the like where electronic displays are needed. With the development of scientific technology, a series of new scientific and technological products such as computers, flat panels, televisions and the like are generated nowadays, and the support of liquid crystal display screens is not available in the products. The display principle of the liquid crystal display screen is that the physical state of liquid crystal molecules in the liquid crystal display screen between solid state and liquid state has refraction effect on light rays, and the liquid crystal molecules change the arrangement sequence under the action of voltage, so that the light rays emitted into the liquid crystal display screen are deflected, and different patterns are displayed. However, the liquid crystal molecules themselves do not produce light, and a light source is required to work in cooperation with the liquid crystal molecules. The acrylic plate is one of organic glass, and various colors are presented by doping different metal elements in the manufacturing process of the acrylic plate. The acrylic plate has good transmittance, excellent mechanical property and low price, thereby being used as a light guide plate behind a liquid crystal display screen. The light guide plate is densely distributed with light guide points, and each light guide point can reflect light outwards, so that the whole light guide plate becomes a light source capable of providing light for the display screen. The optical grade acrylic plate can reflect light emitted by the light source to all angles again, and the display screen can be ensured to emit light uniformly. The optical-grade acrylic plate is a core component in the backlight module component.
The traditional acrylic light guide plate preparation process comprises the steps of forming, printing and the like, but the conditions of uneven coloring of ink, deformation of ink patterns, moire and the like exist in the printing, and the visual observation effect of the formed patterns is influenced.
Disclosure of Invention
The invention aims to provide a silk-screen process for processing an acrylic light guide plate, so as to solve the technical problem.
A silk-screen process for processing an acrylic light guide plate comprises the following steps:
step one, selecting a screen plate and a screen frame, and installing the screen frame and the screen plate;
coating photosensitive glue on the screen printing screen plate, and then drying the plate under a cold light lamp; after the plate drying is finished, washing the plate, checking and repairing the net;
step three, adjusting the color of the printing ink according to the color of the sample plate; the screen plates comprise a yellow screen plate, a magenta screen plate, a cyan screen plate and a black screen plate, and the placing angles of the yellow screen plate, the magenta screen plate, the cyan screen plate and the black screen plate are adjusted to perform printing;
step four, curing and drying the printing layer;
and step five, checking the color and the definition of the patterns of the first three-plate printing product and whether the patterns have the moire patterns.
Preferably, in the first step, the mesh plate has a mesh number of 150 and 200, and the inner edge of the mesh frame is 80-110mm away from the outer edge of the pattern.
As a preferred scheme, the power of the cold light lamp in the second step is 150-; and in the second step, deionized water is adopted for flushing, then the film inspection screen plate is compared, and the photosensitive glue leakage hole is repaired.
Preferably, in the third step, the offset angle of the yellow screen is 0 °, the offset angle of the magenta screen relative to the yellow screen is 10-15 ° clockwise, the offset angle of the cyan screen relative to the yellow screen is 20-25 ° clockwise, and the offset angle of the black screen relative to the yellow screen is 30-35 ° clockwise.
As a preferable scheme, the curing operation in the fourth step is specifically as follows: the first step is to adopt ultraviolet light with the wavelength of 150-250nm and the irradiation power of 20-30W/m2 to irradiate the printed ink for pre-curing for 0.2-0.8 s; the second step is to make the printed ink react for 5 to 10min under the condition of no ultraviolet; the third step is to irradiate the ink layer for 2-3min by using ultraviolet light with the wavelength of 200-300nm and the irradiation power of 15-20W/m2 to carry out complete curing.
As a preferable scheme, the ink in the third step is prepared from the following components in parts by mass: 35-40 parts of water-soluble acrylic resin, 25-30 parts of water-soluble polyurethane, 0.6-0.7 part of ethylene glycol dimethacrylate, 0.5-0.9 part of triethylhexylphosphoric acid, 0.3-0.7 part of cellulose, 0.2-0.4 part of amyl butyrate, 0.6-0.9 part of glycerol octadecanoate, 0.6-0.9 part of aluminum stearate, 0.2-0.4 part of tetraalkyltin and 0.6-0.9 part of cationic photoinitiator.
As a preferable scheme, the ink in the third step is prepared from the following components in parts by mass: 36-39 parts of water-soluble acrylic resin, 26-29 parts of water-soluble polyurethane, 0.6-0.7 part of ethylene glycol dimethacrylate, 0.6-0.8 part of triethylhexylphosphoric acid, 0.4-0.6 part of cellulose, 0.3-0.4 part of amyl butyrate, 0.7-0.8 part of glycerol octadecanoate, 0.7-0.8 part of aluminum stearate, 0.3-0.4 part of tetraalkyltin and 0.7-0.8 part of cationic photoinitiator.
Preferably, the drying temperature in the fourth step is 150-.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a silk-screen process for processing an acrylic light guide plate, wherein a yellow screen plate, a magenta screen plate, a cyan screen plate and a black screen plate sequentially deviate from proper angles clockwise in the silk-screen process, so that printed patterns cannot generate moire, and the visual observation effect is improved; the ink is prepared by adopting 35 to 40 parts of water-soluble acrylic resin, 25 to 30 parts of water-soluble polyurethane, 0.6 to 0.7 part of ethylene glycol dimethacrylate, 0.5 to 0.9 part of triethylhexylphosphoric acid, 0.3 to 0.7 part of cellulose, 0.2 to 0.4 part of amyl butyrate, 0.6 to 0.9 part of glycerol octadecanoate, 0.6 to 0.9 part of aluminum stearate, 0.2 to 0.4 part of tetraalkyltin and 0.6 to 0.9 part of cationic photoinitiator, and has proper viscosity; through the irradiation of high-power ultraviolet rays in a first step in a short time, the printing ink which is just printed can be promoted to be semi-solidified immediately, and the pattern deformation caused by halation and scattering of the printing ink on the acrylic surface layer is prevented, so that the color which appears in the printing process of the printing ink is uneven, and the color is not firmly improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Selecting a screen plate with 200 meshes, wherein the distance between the inner edge of the screen frame and the outer edge of the pattern is 80mm, and mounting the screen frame and the screen plate; coating photosensitive glue on a screen printing plate, and then drying a plate under a cold light lamp, wherein the power of the cold light lamp is 150W in the screen drying operation, the distance between the screen plate and the cold light lamp is 0.5m, and the plate drying time is 3 min; washing the screen plate by using deionized water, checking the screen plate by comparing with the film, and repairing the leakage hole of the photosensitive glue; adjusting the color of the ink according to the color of the sample plate; the ink is prepared from 35 parts of water-soluble acrylic resin, 25 parts of water-soluble polyurethane, 0.6 part of ethylene glycol dimethacrylate, 0.5 part of triethylhexylphosphoric acid, 0.3 part of cellulose, 0.2 part of amyl butyrate, 0.6 part of glyceryl octadecanoate, 0.6 part of aluminum stearate, 0.2 part of tetraalkyltin and 0.6 part of cationic photoinitiator, wherein the screen plate comprises a yellow screen plate, a magenta screen plate, a cyan screen plate and a black screen plate, the arrangement angles of the yellow screen plate, the magenta screen plate, the cyan screen plate and the black screen plate are adjusted, specifically, the installation offset angle of the yellow screen plate is 0 degree, the installation offset angle of the magenta screen plate relative to the yellow screen plate is 10 degrees clockwise, the installation offset angle of the cyan screen plate relative to the yellow screen plate is 20 degrees clockwise, and the installation offset angle of the black screen plate relative to the yellow screen; then, the printed layer is cured and dried, wherein the curing operation of the printed layer is carried out in the first step by adopting the wavelength of 150-250nm and the irradiation power of 20W/m2Irradiating the printed ink by using the ultraviolet light, wherein the irradiation time is 0.2s for precuring, and the second step is to allow the printed ink to react for 5min under the condition of no ultraviolet light; the third step is to adopt the wavelength of 200-300nm and the irradiation power of 15W/m2The ink layer is irradiated by ultraviolet light for 2min for complete curing; the printing layer drying operation is as follows: drying at 150 deg.C for 45min, and cooling to room temperature. The first three prints were checked for pattern color, sharpness and moire.
Example two
Selecting a screen plate with the mesh number of 300, wherein the distance between the inner edge of the screen frame and the outer edge of the pattern is 110mm, and installing the screen frame and the screen plate; coating photosensitive glue on the screen plate, and then coating cold lightDrying the plate under the lamp, wherein the power of the cold light lamp is 200W in the net drying operation, the distance between the screen plate and the cold light lamp is 0.7m, and the plate drying time is 5 min; washing the screen plate by using deionized water, checking the screen plate by comparing with the film, and repairing the leakage hole of the photosensitive glue; adjusting the color of the ink according to the color of the sample plate; the ink is prepared from 40 parts of water-soluble acrylic resin, 30 parts of water-soluble polyurethane, 0.7 part of ethylene glycol dimethacrylate, 0.9 part of triethylhexylphosphoric acid, 0.7 part of cellulose, 0.4 part of amyl butyrate, 0.9 part of glyceryl octadecanoate, 0.9 part of aluminum stearate, 0.4 part of tetraalkyltin and 0.9 part of cationic photoinitiator, wherein the screen plate comprises a yellow screen plate, a magenta screen plate, a cyan screen plate and a black screen plate, the arrangement angles of the yellow screen plate, the magenta screen plate, the cyan screen plate and the black screen plate are adjusted, specifically, the installation offset angle of the yellow screen plate is 0 degree, the installation offset angle of the magenta screen plate relative to the yellow screen plate is 15 degrees clockwise, the installation offset angle of the cyan screen plate relative to the yellow screen plate is 25 degrees clockwise, and the installation offset angle of the black screen plate relative to the yellow screen; then, the printed layer is cured and dried, wherein the curing operation of the printed layer is carried out in the first step by adopting the wavelength of 150-250nm and the irradiation power of 30W/m2Irradiating the printed ink by using the ultraviolet light, wherein the irradiation time is 0.8s for precuring, and the second step is to allow the printed ink to react for 10min under the condition of no ultraviolet light; the third step is to adopt a wavelength of 200-300nm and an irradiation power of 20W/m2The ink layer is irradiated by ultraviolet light for 3min for complete curing; the printing layer drying operation is as follows: drying at 160 deg.C for 60min, and cooling to room temperature. The first three prints were checked for pattern color, sharpness and moire.
EXAMPLE III
Selecting a screen plate with the mesh number of 220 meshes, wherein the distance between the inner edge of the screen frame and the outer edge of the pattern is 90mm, and installing the screen frame and the screen plate; coating photosensitive glue on a screen printing plate, and then drying a plate under a cold light lamp, wherein the power of the cold light lamp is 160W in the screen drying operation, the distance between the screen plate and the cold light lamp is 0.6m, and the plate drying time is 4 min; washing the screen plate by using deionized water, checking the screen plate by comparing with the film, and repairing the leakage hole of the photosensitive glue; adjusting ink color based on template color(ii) a The ink is prepared from 36 parts of water-soluble acrylic resin, 26 parts of water-soluble polyurethane, 0.65 part of ethylene glycol dimethacrylate, 0.7 part of triethylhexylphosphoric acid, 0.4 part of cellulose, 0.3 part of amyl butyrate, 0.7 part of glyceryl octadecanoate, 0.7 part of aluminum stearate, 0.3 part of tetraalkyltin and 0.7 part of cationic photoinitiator, wherein the screen plate comprises a yellow screen plate, a magenta screen plate, a cyan screen plate and a black screen plate, the arrangement angles of the yellow screen plate, the magenta screen plate, the cyan screen plate and the black screen plate are adjusted, specifically, the installation offset angle of the yellow screen plate is 0 degree, the installation offset angle of the magenta screen plate relative to the yellow screen plate is 14 degrees clockwise, the installation offset angle of the cyan screen plate relative to the yellow screen plate is 21 degrees clockwise, and the installation offset angle of the black screen plate relative to the yellow screen; then carrying out printing layer curing and drying treatment, wherein the printing layer curing operation is carried out in a first step by adopting a wavelength of 150-2Irradiating the printed ink by using the ultraviolet light, wherein the irradiation time is 0.3s for precuring, and the second step is to allow the printed ink to react for 6min under the condition of no ultraviolet light; the third step is to adopt a wavelength of 200-300nm and an irradiation power of 16W/m2The ink layer is irradiated by ultraviolet light for 2min for complete curing; the printing layer drying operation is as follows: drying at 152 deg.C for 48min, and cooling to room temperature. The first three prints were checked for pattern color, sharpness and moire.
Example four
Selecting a screen plate with the mesh number of 240 meshes, wherein the distance between the inner edge of the screen frame and the outer edge of the pattern is 90mm, and installing the screen frame and the screen plate; coating photosensitive glue on a screen printing plate, and then drying a plate under a cold light lamp, wherein the power of the cold light lamp is 160W in the screen drying operation, the distance between the screen plate and the cold light lamp is 0.6m, and the plate drying time is 4 min; washing the screen plate by using deionized water, checking the screen plate by comparing with the film, and repairing the leakage hole of the photosensitive glue; adjusting the color of the ink according to the color of the sample plate; the ink is prepared from 38 parts of water-soluble acrylic resin, 29 parts of water-soluble polyurethane, 0.7 part of ethylene glycol dimethacrylate, 0.9 part of triethylhexylphosphoric acid, 0.7 part of cellulose, 0.3 part of amyl butyrate, 0.8 part of glycerol octadecanoate, 0.8 part of aluminum stearate and 0.4 part of tetraalkyltinAnd 0.9 part of cationic photoinitiator, wherein the screen plate comprises a yellow screen plate, a magenta screen plate, a cyan screen plate and a black screen plate, and the arrangement angles of the yellow screen plate, the magenta screen plate, the cyan screen plate and the black screen plate are adjusted, specifically, the installation offset angle of the yellow screen plate is 0 degrees, the installation offset angle of the magenta screen plate relative to the yellow screen plate is 12 degrees in the clockwise direction, the installation offset angle of the cyan screen plate relative to the yellow screen plate is 24 degrees in the clockwise direction, and the installation offset angle of the black screen plate relative to the yellow screen plate is 32 degrees in the; then, the printed layer is cured and dried, wherein the curing operation of the printed layer is carried out in the first step by adopting the wavelength of 150-250nm and the irradiation power of 28W/m2Irradiating the printed ink by using the ultraviolet light for 0.4s for precuring, and reacting the printed ink for 9min under the condition of no ultraviolet ray; the third step is to adopt a wavelength of 200-300nm and an irradiation power of 18W/m2The ink layer is irradiated by ultraviolet light for 3min for complete curing; the printing layer drying operation is as follows: drying at 158 deg.C for 55min, and cooling to room temperature. The first three prints were checked for pattern color, sharpness and moire.
EXAMPLE five
Selecting a screen plate with the mesh number of 260 meshes, wherein the distance between the inner edge of the screen frame and the outer edge of the pattern is 100mm, and installing the screen frame and the screen plate; coating photosensitive glue on a screen printing plate, and then drying a plate under a cold light lamp, wherein the power of the cold light lamp is 190W in the screen drying operation, the distance between the screen plate and the cold light lamp is 0.6m, and the plate drying time is 4 min; washing the screen plate by using deionized water, checking the screen plate by comparing with the film, and repairing the leakage hole of the photosensitive glue; adjusting the color of the ink according to the color of the sample plate; the ink is prepared from 39 parts of water-soluble acrylic resin, 29 parts of water-soluble polyurethane, 0.7 part of ethylene glycol dimethacrylate, 0.8 part of triethylhexylphosphoric acid, 0.6 part of cellulose, 0.3 part of amyl butyrate, 0.7 part of glycerol octadecanoate, 0.7 part of aluminum stearate, 0.3 part of tetraalkyltin and 0.7 part of cationic photoinitiator, wherein the screen plate comprises a yellow screen plate, a magenta screen plate, a cyan screen plate and a black screen plate, the arrangement angles of the yellow screen plate, the magenta screen plate, the cyan screen plate and the black screen plate are adjusted, specifically, the installation offset angle of the yellow screen plate is 0 degree, and the magenta screen plate is opposite to the cyan screen plateThe installation offset angle of the yellow screen is 14 degrees in the clockwise direction, the installation offset angle of the cyan screen relative to the yellow screen is 24 degrees in the clockwise direction, and the installation offset angle of the black screen relative to the yellow screen is 34 degrees in the clockwise direction; then, the printed layer is cured and dried, wherein the curing operation of the printed layer is carried out in the first step by adopting the wavelength of 150-250nm and the irradiation power of 28W/m2Irradiating the printed ink by using the ultraviolet light, wherein the irradiation time is 0.6s for precuring, and the second step is that the printed ink reacts for 9min under the condition of no ultraviolet light; the third step is to adopt a wavelength of 200-300nm and an irradiation power of 18W/m2The ink layer is irradiated by ultraviolet light for 3min for complete curing; the printing layer drying operation is as follows: drying at 159 deg.C for 55min, and cooling to room temperature. The first three prints were checked for pattern color, sharpness and moire.
EXAMPLE six
Selecting a screen plate with 290 meshes, wherein the distance between the inner edge of the screen frame and the outer edge of the pattern is 105mm, and mounting the screen frame and the screen plate; coating photosensitive glue on a screen printing plate, and then drying a plate under a cold light lamp, wherein the power of the cold light lamp is 190W in the screen drying operation, the distance between the screen plate and the cold light lamp is 0.6m, and the plate drying time is 4 min; washing the screen plate by using deionized water, checking the screen plate by comparing with the film, and repairing the leakage hole of the photosensitive glue; adjusting the color of the ink according to the color of the sample plate; the ink is prepared from 38 parts of water-soluble acrylic resin, 29 parts of water-soluble polyurethane, 0.65 part of ethylene glycol dimethacrylate, 0.85 part of triethylhexylphosphoric acid, 0.65 part of cellulose, 0.34 part of amyl butyrate, 0.85 part of glyceryl octadecanoate, 0.85 part of aluminum stearate, 0.35 part of tetraalkyltin and 0.85 part of cationic photoinitiator, wherein the screen plate comprises a yellow screen plate, a magenta screen plate, a cyan screen plate and a black screen plate, the arrangement angles of the yellow screen plate, the magenta screen plate, the cyan screen plate and the black screen plate are adjusted, specifically, the installation offset angle of the yellow screen plate is 0 degree, the installation offset angle of the magenta screen plate relative to the yellow screen plate is 13 degrees clockwise, the installation offset angle of the cyan screen plate relative to the yellow screen plate is 23 degrees clockwise, and the installation offset angle of the black screen plate relative to the yellow screen; then carrying out the curing and drying treatment of the printing layerWherein the curing operation of the printed layer is carried out in the first step by using a curing agent having a wavelength of 240nm and an irradiation power of 29W/m2Irradiating the printed ink by using the ultraviolet light, wherein the irradiation time is 0.6s for precuring, and the second step is to allow the printed ink to react for 8min under the condition of no ultraviolet light; the third step is to adopt a wavelength of 200-300nm and an irradiation power of 19W/m2The ink layer is irradiated by ultraviolet light for 2.5min for complete curing; the printing layer drying operation is as follows: drying at 155 deg.C for 55min, and cooling to room temperature. The first three prints were checked for pattern color, sharpness and moire.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A silk-screen process for processing an acrylic light guide plate is characterized by comprising the following steps:
step one, selecting a screen plate and a screen frame, and installing the screen frame and the screen plate;
coating photosensitive glue on the screen printing screen plate, and then drying the plate under a cold light lamp; after the plate drying is finished, washing the plate, checking and repairing the net;
step three, adjusting the color of the printing ink according to the color of the sample plate; the screen plates comprise a yellow screen plate, a magenta screen plate, a cyan screen plate and a black screen plate, and the placing angles of the yellow screen plate, the magenta screen plate, the cyan screen plate and the black screen plate are adjusted to perform printing;
step four, curing and drying the printing layer;
and step five, checking the color and the definition of the patterns of the first three-plate printing product and whether the patterns have the moire patterns.
2. The screen printing process for processing an acrylic light guide plate as claimed in claim 1, wherein the screen plate in the first step is a screen plate with a mesh number of 150 and 200 meshes, and the distance between the inner edge of the screen frame and the outer edge of the pattern is 80-110 mm.
3. The screen printing process for processing an acrylic light guide plate as claimed in claim 1, wherein in the second step, the power of the cold light lamp is 150-200W, the distance between the screen plate and the cold light lamp is 0.5-0.7m, and the time for drying the plate is 3-5 min; and in the second step, deionized water is adopted for flushing, then the film inspection screen plate is compared, and the photosensitive glue leakage hole is repaired.
4. The silk-screen process for processing an acrylic light guide plate according to claim 1, wherein in the third step, the offset angle of the yellow screen is 0 °, the offset angle of the magenta screen relative to the yellow screen is 10-15 ° clockwise, the offset angle of the cyan screen relative to the yellow screen is 20-25 ° clockwise, and the offset angle of the black screen relative to the yellow screen is 30-35 ° clockwise.
5. The silk-screen process for processing an acrylic light guide plate according to claim 1, wherein the curing operation in the fourth step is as follows: the first step is to adopt the wavelength of 150-250nm and the irradiation power of 20-30W/m2Irradiating the printed ink by using the ultraviolet light, wherein the irradiation time is 0.2-0.8s for precuring; the second step is to make the printed ink react for 5 to 10min under the condition of no ultraviolet; the third step is to adopt the wavelength of 200-300nm and the irradiation power of 15-20W/m2The ink layer is irradiated by the ultraviolet light for 2-3min to be cured completely.
6. The silk-screen process for processing an acrylic light guide plate according to claim 1, wherein the ink in the third step is prepared from the following components in parts by mass: 35-40 parts of water-soluble acrylic resin, 25-30 parts of water-soluble polyurethane, 0.6-0.7 part of ethylene glycol dimethacrylate, 0.5-0.9 part of triethylhexylphosphoric acid, 0.3-0.7 part of cellulose, 0.2-0.4 part of amyl butyrate, 0.6-0.9 part of glycerol octadecanoate, 0.6-0.9 part of aluminum stearate, 0.2-0.4 part of tetraalkyltin and 0.6-0.9 part of cationic photoinitiator.
7. The silk-screen process for processing an acrylic light guide plate according to claim 1, wherein the ink in the third step is prepared from the following components in parts by mass: 36-39 parts of water-soluble acrylic resin, 26-29 parts of water-soluble polyurethane, 0.6-0.7 part of ethylene glycol dimethacrylate, 0.6-0.8 part of triethylhexylphosphoric acid, 0.4-0.6 part of cellulose, 0.3-0.4 part of amyl butyrate, 0.7-0.8 part of glycerol octadecanoate, 0.7-0.8 part of aluminum stearate, 0.3-0.4 part of tetraalkyltin and 0.7-0.8 part of cationic photoinitiator.
8. The screen printing process for processing an acrylic light guide plate as claimed in claim 2, wherein the drying temperature in the fourth step is 150 ℃ and 160 ℃, the drying time is 45-60min, and then the screen printing process is cooled to normal temperature.
Priority Applications (1)
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| CN111649266A (en) * | 2020-06-16 | 2020-09-11 | 杭州止距智能技术有限公司 | Light guide panel lamp with small light loss and cooling and anti-drop functions |
| CN114023916A (en) * | 2021-10-20 | 2022-02-08 | 业成科技（成都）有限公司 | Curved cover plate preparation method, curved cover plate and electronic equipment |
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