CN112110655A - Production process and detection method of cover plate glass for touch panel - Google Patents
Production process and detection method of cover plate glass for touch panel Download PDFInfo
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- CN112110655A CN112110655A CN202010908012.XA CN202010908012A CN112110655A CN 112110655 A CN112110655 A CN 112110655A CN 202010908012 A CN202010908012 A CN 202010908012A CN 112110655 A CN112110655 A CN 112110655A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
- C03C2217/72—Decorative coatings
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
- C03C2217/73—Anti-reflective coatings with specific characteristics
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
- C03C2217/78—Coatings specially designed to be durable, e.g. scratch-resistant
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/31—Pre-treatment
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/365—Coating different sides of a glass substrate
Abstract
The invention discloses a production process and a detection method of cover plate glass for a touch pad, which comprises the following steps: step one, performing feeding inspection on a glass raw material and ink, performing primary cutting on the glass raw material, and performing AG frosting treatment on the glass raw material by using an AG coating; secondly, carrying out quality inspection on the glass raw material again, and cutting the glass raw material again to form a glass substrate; polishing the glass substrate through CNC engraving and removing allowance; cleaning the polished glass substrate, and performing quality sampling inspection on the glass substrate; step five, strengthening the glass substrate, and then cleaning and inspecting the glass substrate again; step six, enabling the ink to be attached to the surface of the glass substrate through screen printing and baking, cleaning to form cover plate glass, and carrying out non-lighting full inspection; step seven, lighting and fully inspecting the cover plate glass, and performing film coating treatment; and step eight, finally, performing quality inspection. The invention has the beneficial effects that: preventing glare.
Description
Technical Field
The invention relates to the technical field of touch panels, in particular to a production process and a detection method of cover plate glass for a touch panel.
Background
In modern society, products such as touch mobile phones, tablet computers, automobile center control panel glass, navigators and the like enter more and more families, and consumers have higher and higher consumption requirements on electronic products with touch panels.
The traditional cover plate glass for touch control easily generates glare, and the problem that fingerprint sweat stains are left affects the use effect of the cover plate glass and the vision of people.
Disclosure of Invention
The invention provides a production process and a detection method of cover plate glass for a touch pad, which are not easy to generate glare, and aims to overcome the defect that the cover plate glass for the touch pad is easy to generate glare in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a production process of cover plate glass for a touch control plate comprises the following steps:
respectively carrying out feeding inspection on a glass raw material and ink, carrying out preliminary cutting on the glass raw material after the glass raw material and the ink are qualified, and carrying out AG frosting treatment on the glass raw material by using an AG coating to form an AG protective film;
secondly, performing quality inspection on the AG frosted glass raw material again, and cutting the AG frosted glass raw material again to form a glass substrate after the AG frosted glass raw material is qualified;
polishing the glass substrate through CNC engraving and removing allowance to meet the requirements of final products;
cleaning the polished glass substrate, and performing quality sampling inspection on the glass substrate;
step five, strengthening the glass substrate to enhance the surface stress of the glass substrate, and then cleaning and inspecting the glass substrate again;
step six, enabling the ink to be attached to the surface of the glass substrate through screen printing and baking, then cleaning to form cover plate glass, and carrying out non-lighting full inspection;
step seven, lighting and fully inspecting the cover plate glass, and performing surface coating treatment after the cover plate glass is qualified;
and step eight, finally, carrying out quality inspection, and packaging and warehousing after the quality inspection is qualified.
Respectively performing feeding inspection on a glass raw material and printing ink to ensure the quality of a finished product, performing primary cutting on the glass raw material after the inspection is qualified, conveniently cutting the glass raw material into a glass substrate with a certain size by using equipment, and performing AG frosting treatment on the glass substrate by using an AG coating to form an AG protective film so as to prevent glare;
secondly, performing quality inspection on the glass raw material subjected to AG frosting treatment again to inspect whether the surface of the glass raw material subjected to AG frosting treatment is not damaged, the coating thickness of the AG coating meets the standard and the like, so that the product quality is ensured, and cutting the glass raw material again to form a glass substrate after the product is inspected to be qualified;
polishing the glass substrate through CNC (computer numerical control) engraving processing, removing allowance, wherein the proportion ratio of cutting fluid to water is 1:20, and the size, the surface and the edge of the glass substrate are free of burrs and the like through CNC processing so as to meet the requirements of final products;
cleaning the polished glass substrate, and performing quality spot check on the polished glass substrate, wherein the CNC engraving process generates scraps, so that the scraps need to be cleaned by ultrasonic cleaning to perform another quality check on the polished glass substrate, so that the quality check accuracy is improved;
step five, strengthening the glass substrate to enhance the surface stress of the glass substrate, and then cleaning and inspecting the glass substrate again; setting the strengthening temperature of the strengthening furnace to be 415 ℃, strengthening practice to be 480H, putting the glass substrate into the strengthening furnace to strengthen the surface stress of the glass substrate, so that the glass can achieve the effects of scratch resistance and impact resistance, prolonging the service life of the glass substrate, then removing strengthening liquid through ultrasonic cleaning, randomly extracting five glass substrates, and checking whether the strengthened glass substrate meets the conditions that CS is more than 450MPa and DOL is more than 8 mu m by using a stress gauge;
sixthly, enabling the printing ink to be attached to the surface of the glass substrate through screen printing and baking, ensuring that the temperature of a screen printing workshop is 22 +/-3 ℃, the humidity is 65 +/-10% RH, simultaneously ten thousand-level cleanliness is required, the tension of a screen printing plate is 22 +/-3N, enabling the printing ink not to fall off easily through baking after screen printing is finished, the baking temperature during screen printing is 150 +/-5 ℃, the baking linear speed is 7.5 +/-0.5, the equipment printing speed is less than or equal to 550mm/min, the ink return speed is less than or equal to 550mm/min, then cleaning to form cover glass, and carrying out non-lighting full inspection to inspect whether the glass substrate after screen printing has defects such as scratches, cracks, mouth breakage and the like, whether the printing ink meets the standard or not and the like; the main purpose of silk-screen printing is to make the printing ink present the technological effects of different colors, different shapes and patterns on the glass surface, and the main working principle is to make the printing ink adhere to the glass surface by screen printing and drying, thereby realizing the appearance effect required by the finished product.
Step seven, performing lighting full inspection on the cover plate glass to inspect whether dark spots, bright spots and light transmittance of the silk-screen glass substrate meet standards, and performing surface coating treatment by AF liquid medicine after the inspection is qualified to avoid fingerprint retention;
and step eight, finally, carrying out quality inspection, and packaging and warehousing after the quality inspection is qualified. The quality of the finished product is greatly improved through multi-layer quality inspection. In conclusion, the main purpose of cleaning is to remove dirt, dust points and other objects attached to the surface of the glass through ultrasonic waves, so that the cover plate glass can achieve better effects in the production processes of strengthening, silk-screen printing, film coating and the like; the cover plate glass is subjected to AG frosting treatment by using AG paint, so that the purpose of being difficult to generate glare is achieved.
Preferably, in the first step, the AG coating is formulated with 35% ammonium bifluoride, 10% barium sulfate, 20% citric acid monohydrate, and 35% water in percentage to maximize the anti-glare effect.
Preferably, in the first step, the glass after the AG frosting has a surface roughness of 0.4 to 0.6 μm, a gloss of 16 to 20 and a thickness of 0.99 to 1.08 mm. So that the anti-glare effect is optimized.
Preferably, in the sixth step, the screen printing is divided into five printing processes in the order of front and back, wherein each printing process comprises: and the screen printing logo, the screen printing photosensitive layer, the screen printing shielding layer, the first screen printing protective layer and the second screen printing protective layer are baked and fixed after each printing. The baking temperature during silk-screen printing is 150 +/-5 ℃, the baking linear speed is 7.5 +/-0.5, the printing speed of equipment is less than or equal to 550mm/min, and the ink returning speed is less than or equal to 550mm/min, so that the ink is not easy to fall off.
Preferably, the cover plate glass comprises a glass substrate, the glass substrate comprises a front surface and a back surface, the logo, a first protective layer and a second protective layer are all located on the front surface of the glass substrate, the logo is formed by silk-screening logo ink on the front surface of the glass substrate and fixing the logo through baking, the first protective layer is formed by silk-screening protective ink on the logo and the front surface of the glass substrate respectively and fixing the protective ink on the logo through baking, the second protective layer is formed by silk-screening protective ink on the first protective layer and fixing the protective ink through baking, and an AG protective film, the photosensitive layer and the shielding layer are positioned on the back surface of the glass substrate, the AG protective film is tightly attached to the back surface of the glass substrate, the photosensitive layer is positioned between the AG protective film and the shielding layer, the photosensitive layer is formed by silk-screening photosensitive ink on the AG protective film and fixing the photosensitive layer through baking, and the shielding layer is formed by silk-screening shielding ink on the photosensitive layer and fixing the photosensitive layer through baking. The AG protective film is used for preventing glare; the photosensitive layer is used for presenting a pattern or a key mark to be displayed in a lighting state; the shielding layer is used for shielding other areas except the pattern or the key mark in a lighting state.
The invention also provides a detection method of the cover plate glass for the touch pad, the tests required by the cover plate glass comprise a temperature test, a wear resistance test, a hundred-grid test and an artificial sweat test, and the number of the cover plate glass spot checks required by the temperature test, the wear resistance test, the hundred-grid test and the artificial sweat test is five. The performance of the cover glass is tested under different detection conditions, so that the cover glass can have a long service life and good use experience can be generated for users.
Preferably, the cover glass is placed in a high-temperature and high-humidity device to be subjected to high-low temperature test, cold-heat impact test and high-temperature and high-humidity test respectively during temperature test, the inspection standard of the temperature test is that the surface of the cover glass is free from abnormal shape and no light leakage is confirmed in a dark room of less than 10Lux, the high-temperature test temperature of the high-temperature and high-humidity device is set to be 60 ℃ during the high-low temperature test, the test time is 24 hours, the low-temperature test temperature of the high-temperature and high-humidity device is set to be-30 ℃, the test time is 24 hours, the cold-heat impact temperature of the high-temperature and high-humidity device is set to be-30 ℃ to 60 ℃ during the cold-heat impact test, tests with different impact frequencies are respectively carried out twice at the temperature, the impact frequency of the high-temperature and high-humidity device is set to be 45 minutes/step during the first test, the cycle number, the cycle number is 12 times, the conversion rate is 7 degrees/minute, the temperature of a high-temperature high-humidity device in the high-temperature high-humidity test is 40 ℃, the humidity is 90 percent, the retention time is 24 hours, meanwhile, the temperature change gradient is less than 20 ℃ per hour, the humidity change gradient is less than 20 percent to prevent condensation, the test steps of the high-temperature low-temperature test, the cold-heat impact test and the high-temperature high-humidity test are the same, and the specific test steps are as follows:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
placing the cover plate glass with the appearance meeting the standard in high-temperature high-humidity equipment with set testing parameters;
step three, starting the equipment;
and step four, taking out the cover plate glass, standing for 2 hours, and then checking whether the appearance of the cover plate glass meets the standard.
And observing whether the surface of the cover plate glass has abnormal shape and leakage under a dark room with the Lux of less than 10 after detection.
Preferably, the wear resistance test comprises an alcohol wear resistance test, an eraser wear resistance test and a felt wear resistance test, the alcohol wear resistance test and the eraser wear resistance test are divided into a front test and a back test, the front test and the back test are the same, the test standard of the alcohol wear resistance test is that paint blocks formed by the ink on the surface of the cover plate glass are not worn and have no difference in color, and the specific test steps of the alcohol wear resistance test are as follows:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
fixing the cover plate glass with the appearance meeting the standard on a platform of the friction-resistant tester, and uniformly bearing the force;
step three, preparing a piece of gauze with the size of 45 × 45mm and the thickness of 1.5mm and 95% alcohol;
fixing gauze on a copper column of a friction-resistant tester clamp, wherein the thickness of the part, wrapped on the end part of the copper column, of the gauze is 5mm, namely eight layers of gauze are wrapped on the end part of the copper column, so that the copper column on the clamp is prevented from scratching cover plate glass and affecting a detection result;
adding a proper amount of 95% alcohol on gauze;
step six, the clamp drives the gauze to continuously perform friction test on the surface of the cover plate glass at the speed of 2 seconds/back and forth, and the test distance is 6 cm;
and step seven, checking whether the appearance of the cover plate glass meets the standard. And (5) checking whether paint blocks formed by the ink on the front side and the back side of the cover plate glass are abraded or not and whether the color of the paint blocks is different or not.
The rubber wear resistance test has the inspection standard that a paint block formed by ink on the surface of cover plate glass is not worn, and the rubber wear resistance test comprises the following specific test steps:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
fixing the cover plate glass with the appearance meeting the standard on a platform of the friction-resistant tester, and uniformly bearing the force;
taking a section of eraser, and grinding the end to be tested of the eraser by using sand paper;
vertically fixing the eraser on a clamp of the friction-resistant tester, wherein the shortest distance from the end to be tested of the eraser to the clamp is 3 mm; the whole testing process can be completed by ensuring the amount of the eraser exposed out of the clamp, and the cover plate glass is prevented from being scratched by the contact of the clamp and the cover plate glass to influence the detection result;
step five, adding weights on the clamp to enable the load weight of the clamp to be 500 g; so as to increase the friction force between the eraser and the cover glass.
Step six, continuously performing friction test on the surface of the cover plate glass by driving the eraser with a clamp at a speed of 2 seconds/back and forth, wherein the test distance is 6 cm;
and step seven, checking whether the appearance of the cover plate glass meets the standard. And (5) checking whether paint blocks formed by the ink on the front side and the back side of the cover plate glass are abraded or not and whether the color of the paint blocks is different or not.
The detection standard of the felt wear-resistant test is that the surface of the cover plate glass cannot be brightened and a paint block formed by ink is not worn, and the specific test steps of the felt wear-resistant test are as follows:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
fixing the cover plate glass with the appearance meeting the standard on a platform of the friction-resistant tester, and uniformly bearing the force;
fixing the felt on a clamp of a friction-resistant tester, wherein the thickness of a part to be tested of the felt is 3 mm;
adding weights to the clamp to enable the load weight of the clamp to be 500 g;
step five, the clamp drives the felt to continuously perform friction test on the surface of the cover plate glass at the speed of 2 seconds/back and forth until the test is finished;
and step six, checking whether the appearance of the cover plate glass has an obvious lightening phenomenon, and if the appearance of the cover plate glass cannot be judged by naked eyes, judging whether delta E is less than 0.75 by using a colorimeter.
Preferably, the specific test steps of the Baige test are as follows:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
step two, evenly applying force to the surface of the cover plate glass with qualified appearance by the hundred-grid scraper, and cutting a 5 cm-long cutting mark from left to right;
rotating the cover plate glass by 90 degrees, repeating the action of the second step, and finally completing cross-shaped cutting marks to form 100 small grids;
cleaning the scraps on the surface of the cover plate glass by using a brush;
step five, taking a section of adhesive tape with the length of 7cm, adhering the adhesive tape to the cross-shaped cutting mark on the cover plate glass from left to right by using hand power, and extruding air between the adhesive tape and the cover plate glass to enable the adhesive tape to be tightly attached to the cover plate glass;
step six, rapidly tearing the adhesive tape from left to right in 1 second;
and step seven, checking the adhesion degree of paint blocks formed by the ink in the torn adhesive tape.
Preferably, the test standard of the artificial sweat test is that the surface of the cover plate glass has no abnormal shape, and the artificial sweat is prepared from the following raw materials in concentration: 20g/l of sodium chloride, 17.5 g/l of ammonium chloride, 5 g/l of urea, 2.5 g/l of acetic acid, 15 g/l of lactic acid and 80 g/l of sodium hydroxide, and adjusting the pH value to 4.7, wherein the specific test steps are as follows:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
dripping 10 drops of prepared artificial sweat on the surface of the cover plate glass, wherein each drop is about 0.05ml, and the spacing distance is 10 mm;
placing the sample in a constant temperature and humidity box, setting the temperature of the constant temperature and humidity box to be 75 ℃, the humidity to be 90 percent and the testing time to be 24 hours;
step four, after 24 hours of testing, setting the temperature of the constant temperature and humidity box to be 250 ℃, the humidity to be 50 percent and the testing time to be 2 hours, so that the cover plate glass reaches the constant temperature;
and step five, taking out the cover plate glass, immediately washing the area on which the artificial sweat is dripped by using common tap water, and then checking.
The invention has the beneficial effects that: the AG protective film can prevent glare and does not leave fingerprints and sweat marks; the service life is long; the quality of the finished product is greatly improved through multiple quality checks; the ink has high adhesion degree through baking; the detection method has strong operability.
Drawings
FIG. 1 is a schematic flow diagram of the production process of the present invention;
fig. 2 is a schematic structural diagram of the present invention.
In the figure: 1. the glass substrate, 2, a first protective layer, 3, a second protective layer, 4, an AG protective film, 5, a photosensitive layer and 6, a shielding layer.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
In the embodiment shown in fig. 1, a process for manufacturing a cover glass for a touch panel includes the following steps:
respectively carrying out feeding inspection on a glass raw material and printing ink, carrying out primary cutting on the glass raw material after the glass raw material and the printing ink are qualified, and carrying out AG frosting treatment on the glass raw material by using an AG coating to form an AG protective film 4;
secondly, performing quality inspection on the AG frosted glass raw material again, and cutting the AG frosted glass raw material again to form a glass substrate 1 after the AG frosted glass raw material is qualified;
polishing the glass substrate 1 through CNC engraving and removing allowance to meet the requirements of final products;
cleaning the polished glass substrate 1, and performing quality sampling inspection on the glass substrate;
step five, strengthening the glass substrate 1 to enhance the surface stress thereof, and then cleaning and inspecting the glass substrate again;
step six, enabling the ink to be attached to the surface of the glass substrate 1 through screen printing and baking, then cleaning to form cover plate glass, and carrying out non-lighting full inspection;
step seven, lighting and fully inspecting the cover plate glass, and performing surface coating treatment after the cover plate glass is qualified;
and step eight, finally, carrying out quality inspection, and packaging and warehousing after the quality inspection is qualified.
In step one, the AG coating is prepared from 35% ammonium bifluoride, 10% barium sulfate, 20% citric acid monohydrate, and 35% water in percentage.
In the first step, the surface roughness range of the glass subjected to AG frosting treatment is 0.4-0.6 μm, the glossiness range is 16-20, and the thickness range is 0.99-1.08 mm.
In the sixth step, the silk-screen printing is divided into five printing procedures in the front and back sequence, and the printing procedures are respectively as follows: and the screen printing logo, the screen printing photosensitive layer 5, the screen printing shielding layer 6, the screen printing protective layer I2 and the screen printing protective layer II 3 are fixed by baking after each printing.
As shown in fig. 2, the cover glass includes a glass substrate 1, the glass substrate 1 includes a front side and a back side, a logo, a first protective layer 2 and a second protective layer 3 are all located on the front side of the glass substrate 1, the logo is formed by silk-screening logo ink on the front side of the glass substrate 1 and fixing the logo through baking, the first protective layer 2 is formed by silk-screening protective ink on the logo and the front side of the glass substrate 1 respectively and fixing the protective ink through baking, the second protective layer 3 is formed by silk-screening protective ink on the first protective layer 2 and fixing the protective ink through baking, and an AG protective film 4, the photosensitive layer 5 and the shielding layer 6 are both positioned on the back surface of the glass substrate 1, the AG protection film 4 is tightly attached to the back surface of the glass substrate 1, the photosensitive layer 5 is positioned between the AG protection film 4 and the shielding layer 6, the photosensitive layer 5 is formed by silk-screening photosensitive ink on the AG protection film 4 and fixing the photosensitive layer through baking, and the shielding layer 6 is formed by silk-screening the shielding ink on the photosensitive layer 5 and fixing the shielding ink through baking.
The invention also provides a detection method of the cover plate glass for the touch pad, the tests required by the cover plate glass comprise a temperature test, a wear resistance test, a hundred-grid test and an artificial sweat test, and the number of the cover plate glass spot checks required by the temperature test, the wear resistance test, the hundred-grid test and the artificial sweat test is five.
The cover glass is placed in high-temperature and high-humidity equipment to be subjected to high-low temperature test, cold-heat impact test and high-temperature and high-humidity test respectively during temperature test, the test standard of the temperature test is that the surface of the cover glass is free from abnormal shape and no light leakage is confirmed in a dark room of less than 10Lux, the high-temperature test temperature of the high-temperature and high-humidity equipment is set to be 60 ℃ during the high-low temperature test, the test time is 24 hours, the low-temperature test temperature of the high-temperature and high-humidity equipment is set to be-30 ℃, the test time is 24 hours, the cold-heat impact temperature of the high-temperature and high-humidity equipment is set to be-30 ℃ to 60 ℃ during the cold-heat impact test, tests with different impact frequencies are carried out twice respectively at the temperature, the impact frequency of the high-temperature and high-humidity equipment is set to be 45 minutes per step during the first test, the cycle number, the cycle number is 12 times, the conversion rate is 7 degrees/minute, the temperature of a high-temperature high-humidity device in the high-temperature high-humidity test is 40 ℃, the humidity is 90 percent, the retention time is 24 hours, meanwhile, the temperature change gradient is less than 20 ℃ per hour, the humidity change gradient is less than 20 percent to prevent condensation, the test steps of the high-temperature low-temperature test, the cold-heat impact test and the high-temperature high-humidity test are the same, and the specific test steps are as follows:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
placing the cover plate glass with the appearance meeting the standard in high-temperature high-humidity equipment with set testing parameters;
step three, starting the equipment;
and step four, taking out the cover plate glass, standing for 2 hours, and then checking whether the appearance of the cover plate glass meets the standard. The cover plate glass has no abnormal surface and no light leakage in a dark room with the volume less than 10Lux, and meets the basic requirements of design, production and customer quality.
The wear resistance test comprises an alcohol wear resistance test, an eraser wear resistance test and a felt wear resistance test, wherein the alcohol wear resistance test and the eraser wear resistance test are divided into a front test and a back test, the front test and the back test are the same, the test standard of the alcohol wear resistance test is that a paint block formed by the ink on the surface of the cover plate glass is not worn and has no difference in color, and the specific test steps of the alcohol wear resistance test are as follows:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
fixing the cover plate glass with the appearance meeting the standard on a platform of the friction-resistant tester, and uniformly bearing the force;
step three, preparing a piece of gauze with the size of 45 × 45mm and the thickness of 1.5mm and 95% alcohol;
fixing the gauze on the copper column of the friction-resistant tester clamp, wherein the thickness of the part, wrapped on the end part of the copper column, of the gauze is 5mm, namely eight layers of gauze are wrapped on the end part of the copper column;
adding a proper amount of 95% alcohol on gauze;
step six, the clamp drives the gauze to continuously perform friction test on the surface of the cover plate glass at the speed of 2 seconds/back and forth, and the test distance is 6 cm;
and step seven, checking whether the appearance of the cover plate glass meets the standard. The paint blocks on the surface of the cover plate glass are not worn and have no color difference, thereby meeting the basic requirements of design, production and customer quality.
The rubber wear resistance test has the inspection standard that a paint block formed by ink on the surface of cover plate glass is not worn, and the rubber wear resistance test comprises the following specific test steps:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
fixing the cover plate glass with the appearance meeting the standard on a platform of the friction-resistant tester, and uniformly bearing the force;
taking a section of eraser, and grinding the end to be tested of the eraser by using sand paper;
vertically fixing the eraser on a clamp of the friction-resistant tester, wherein the shortest distance from the end to be tested of the eraser to the clamp is 3 mm;
step five, adding weights on the clamp to enable the load weight of the clamp to be 500 g;
step six, continuously performing friction test on the surface of the cover plate glass by driving the eraser with a clamp at a speed of 2 seconds/back and forth, wherein the test distance is 6 cm;
and step seven, checking whether the appearance of the cover plate glass meets the standard. The paint blocks on the surface of the cover plate glass are not abraded, and the basic requirements of design, production and customer quality are met.
The detection standard of the felt wear-resistant test is that the surface of the cover plate glass cannot be brightened and a paint block formed by ink is not worn, and the specific test steps of the felt wear-resistant test are as follows:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
fixing the cover plate glass with the appearance meeting the standard on a platform of the friction-resistant tester, and uniformly bearing the force;
fixing the felt on a clamp of a friction-resistant tester, wherein the thickness of a part to be tested of the felt is 3 mm;
adding weights to the clamp to enable the load weight of the clamp to be 500 g;
step five, the clamp drives the felt to continuously perform friction test on the surface of the cover plate glass at the speed of 2 seconds/back and forth until the test is finished;
and step six, checking whether the appearance of the cover plate glass has an obvious lightening phenomenon, and if the appearance of the cover plate glass cannot be judged by naked eyes, judging whether delta E is less than 0.75 by using a colorimeter. The test result shows that the surface of the cover plate glass has no obvious lightening phenomenon, and the paint block formed by the ink is not abraded, thereby meeting the basic requirements of design, production and customer quality.
The specific test steps of the hundred lattice test are as follows:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
step two, evenly applying force to the surface of the cover plate glass with qualified appearance by the hundred-grid scraper, and cutting a 5 cm-long cutting mark from left to right;
rotating the cover plate glass by 90 degrees, repeating the action of the second step, and finally completing cross-shaped cutting marks to form 100 small grids;
cleaning the scraps on the surface of the cover plate glass by using a brush;
step five, taking a section of adhesive tape with the length of 7cm, adhering the adhesive tape to the cross-shaped cutting mark on the cover plate glass from left to right by using hand power, and extruding air between the adhesive tape and the cover plate glass to enable the adhesive tape to be tightly attached to the cover plate glass;
step six, rapidly tearing the adhesive tape from left to right in 1 second;
and step seven, checking the adhesion degree of paint blocks formed by the ink in the torn adhesive tape. The test result is more than or equal to 4B, which shows that the adhesion of the cover plate glass paint block is good.
The test standard of the artificial sweat test is that the surface of the cover plate glass has no abnormal shape, and the artificial sweat is prepared from the following raw materials in concentration: 20g/l of sodium chloride, 17.5 g/l of ammonium chloride, 5 g/l of urea, 2.5 g/l of acetic acid, 15 g/l of lactic acid and 80 g/l of sodium hydroxide, and adjusting the pH value to 4.7, wherein the specific test steps are as follows:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
dripping 10 drops of prepared artificial sweat on the surface of the cover plate glass, wherein each drop is about 0.05ml, and the spacing distance is 10 mm;
placing the sample in a constant temperature and humidity box, setting the temperature of the constant temperature and humidity box to be 75 ℃, the humidity to be 90 percent and the testing time to be 24 hours;
step four, after 24 hours of testing, setting the temperature of the constant temperature and humidity box to be 250 ℃, the humidity to be 50 percent and the testing time to be 2 hours, so that the cover plate glass reaches the constant temperature;
and step five, taking out the cover plate glass, immediately washing the area on which the artificial sweat is dripped by using common tap water, and then checking. The test result shows that the surface has no change, which indicates that the cover glass has the performance of sweat resistance.
In addition, since some beauty loved people often have hand cream on their hands in order to prevent frost cracking in cold winter season, the cover glass also needs to have certain cosmetic resistance, and the specific test steps for making the cosmetic resistance test are as follows:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
step two, uniformly coating a proper amount of hand cream on fingers, and then coating the hand cream on the surface of the cover plate glass to be detected, wherein the coating area is 80mm to 80 mm;
placing the sample in a constant temperature and humidity box, setting the temperature of the constant temperature and humidity box to be 75 ℃, the humidity to be 90 percent and the testing time to be 24 hours;
step four, after 24 hours of testing, setting the temperature of the constant temperature and humidity box to be 250 ℃, the humidity to be 50 percent and the testing time to be 2 hours, so that the cover plate glass reaches the constant temperature;
and step five, taking out the cover plate glass, wiping the cover plate glass in a mode of not damaging the surface of the cover plate glass, and then observing the surface condition. The test results showed no change in surface, indicating that the cover glass had cosmetic resistance.
Claims (10)
1. A production process of cover plate glass for a touch control plate is characterized by comprising the following steps:
respectively carrying out feeding inspection on a glass raw material and the printing ink, carrying out primary cutting on the glass raw material after the raw material and the printing ink are qualified, and carrying out AG frosting treatment on the glass raw material by using an AG coating to form an AG protective film (4);
secondly, performing quality inspection on the AG frosted glass raw material again, and performing cutting again to form a glass substrate (1) after the inspection is qualified;
polishing the glass substrate (1) through CNC engraving and removing allowance to meet the requirements of final products;
cleaning the polished glass substrate (1), and performing quality sampling inspection on the glass substrate;
step five, strengthening the glass substrate (1) to enhance the surface stress of the glass substrate, and then cleaning and inspecting the glass substrate again;
step six, enabling the ink to be attached to the surface of the glass substrate (1) through screen printing and baking, then cleaning to form cover plate glass, and carrying out non-lighting full inspection;
step seven, lighting and fully inspecting the cover plate glass, and performing surface coating treatment after the cover plate glass is qualified;
and step eight, finally, carrying out quality inspection, and packaging and warehousing after the quality inspection is qualified.
2. The process of claim 1, wherein in the first step, the AG coating is prepared from, in percentage by weight, 35% ammonium bifluoride, 10% barium sulfate, 20% citric acid monohydrate, and 35% water.
3. The process for producing a cover glass for a touch panel according to claim 1, wherein in the first step, the glass subjected to AG frosting has a surface roughness of 0.4 to 0.6 μm, a gloss of 16 to 20 and a thickness of 0.99 to 1.08 mm.
4. The process according to claim 1, wherein in the sixth step, the screen printing is divided into five printing steps in the sequence from front to back, wherein the printing steps are as follows: the screen printing logo, the screen printing photosensitive layer (5), the screen printing shielding layer (6), the screen printing protective layer I (2) and the screen printing protective layer II (3) are fixed by baking after each printing.
5. The production process of the cover plate glass for the touch control plate as claimed in claim 4, wherein the cover plate glass comprises a glass substrate (1), the glass substrate (1) comprises a front surface and a back surface, the logo, the first protective layer (2) and the second protective layer (3) are all positioned on the front surface of the glass substrate (1), the logo is formed by silk-screening logo ink on the front surface of the glass substrate (1) and fixing the logo through baking, the first protective layer (2) is formed by silk-screening protective ink on the logo and the front surface of the glass substrate (1) respectively and fixing the protective ink through baking, the second protective layer (3) is formed by silk-screening protective ink on the first protective layer (2) and fixing the protective ink on the back surface through baking, the AG protective film (4), the photosensitive layer (5) and the shielding layer (6) are all positioned on the glass substrate (1), the protective film (4) is tightly attached to the back surface of the glass substrate (1), the photosensitive layer (5) is located between the AG protective film (4) and the shielding layer (6), the photosensitive layer (5) is formed by silk-screening photosensitive ink on the AG protective film (4) and fixing the photosensitive layer through baking, and the shielding layer (6) is formed by silk-screening shielding ink on the photosensitive layer (5) and fixing the shielding ink through baking.
6. The detection method of the cover glass for the touch pad is characterized in that tests required by the cover glass comprise a temperature test, a wear resistance test, a hundred-grid test and an artificial sweat test, and the number of the cover glass spot checks required by the temperature test, the wear resistance test, the hundred-grid test and the artificial sweat test is five.
7. The method as claimed in claim 6, wherein the cover glass is placed in a high-temperature and high-humidity device for high-low temperature test, cold-hot impact test and high-temperature and high-humidity test, respectively, during the temperature test, the test standards of the temperature test are that the cover glass surface is free of abnormal shape and no light leakage is confirmed in a dark room with a Lux of less than 10, the high-temperature and high-humidity device is set to have a high-temperature test temperature of 60 ℃ and a test time of 24 hours during the high-low temperature test, and simultaneously the high-temperature and high-humidity device is set to have a low-temperature test temperature of-30 ℃ and a test time of 24 hours during the high-low temperature test, the high-temperature and high-humidity device is set to have a cold-hot impact temperature of-30 ℃ to 60 ℃ during the cold-hot impact test, and the tests with different impact frequencies are performed twice, the cycle number is 27, the conversion rate is 8 degrees/minute, the impact frequency of the high-temperature and high-humidity equipment is set to be 2 hours/step in the second test, the cycle number is 12, the conversion rate is 7 degrees/minute, the temperature of the high-temperature and high-humidity equipment is set to be 40 ℃, the humidity is 90 percent in the high-temperature and high-humidity test, the retention time is 24 hours, meanwhile, the temperature change gradient is less than 20 ℃ per hour, the humidity change gradient is less than 20 percent to prevent condensation, and the test steps of the high-temperature and low-temperature test, the cold-heat impact test and the high-temperature and high-humidity test are the same, and the specific test steps are as:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
placing the cover plate glass with the appearance meeting the standard in high-temperature high-humidity equipment with set testing parameters;
step three, starting the equipment;
and step four, taking out the cover plate glass, standing for 2 hours, and then checking whether the appearance of the cover plate glass meets the standard.
8. The method for detecting cover glass for a touch panel according to claim 6, wherein the wear resistance test includes an alcohol wear resistance test, an eraser wear resistance test and a felt wear resistance test, the alcohol wear resistance test and the eraser wear resistance test are divided into a front test and a back test, the front test and the back test are performed in the same manner, the alcohol wear resistance test is performed according to the standard that a paint block formed by ink on the surface of the cover glass is not worn and has no color difference, and the alcohol wear resistance test comprises the following specific test steps:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
fixing the cover plate glass with the appearance meeting the standard on a platform of the friction-resistant tester, and uniformly bearing the force;
step three, preparing a piece of gauze with the size of 45 × 45mm and the thickness of 1.5mm and 95% alcohol;
fixing the gauze on the copper column of the friction-resistant tester clamp, wherein the thickness of the part, wrapped on the end part of the copper column, of the gauze is 5mm, namely eight layers of gauze are wrapped on the end part of the copper column;
adding a proper amount of 95% alcohol on gauze;
step six, the clamp drives the gauze to continuously perform friction test on the surface of the cover plate glass at the speed of 2 seconds/back and forth, and the test distance is 6 cm;
step seven, checking whether the appearance of the cover plate glass meets the standard;
the rubber wear resistance test has the inspection standard that a paint block formed by ink on the surface of cover plate glass is not worn, and the rubber wear resistance test comprises the following specific test steps:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
fixing the cover plate glass with the appearance meeting the standard on a platform of the friction-resistant tester, and uniformly bearing the force;
taking a section of eraser, and grinding the end to be tested of the eraser by using sand paper;
vertically fixing the eraser on a clamp of the friction-resistant tester, wherein the shortest distance from the end to be tested of the eraser to the clamp is 3 mm;
step five, adding weights on the clamp to enable the load weight of the clamp to be 500 g;
step six, continuously performing friction test on the surface of the cover plate glass by driving the eraser with a clamp at a speed of 2 seconds/back and forth, wherein the test distance is 6 cm;
step seven, checking whether the appearance of the cover plate glass meets the standard;
the detection standard of the felt wear-resistant test is that the surface of the cover plate glass cannot be brightened and a paint block formed by ink is not worn, and the specific test steps of the felt wear-resistant test are as follows:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
fixing the cover plate glass with the appearance meeting the standard on a platform of the friction-resistant tester, and uniformly bearing the force;
fixing the felt on a clamp of a friction-resistant tester, wherein the thickness of a part to be tested of the felt is 3 mm;
adding weights to the clamp to enable the load weight of the clamp to be 500 g;
step five, the clamp drives the felt to continuously perform friction test on the surface of the cover plate glass at the speed of 2 seconds/back and forth until the test is finished;
and step six, checking whether the appearance of the cover plate glass has an obvious lightening phenomenon, and if the appearance of the cover plate glass cannot be judged by naked eyes, judging whether delta E is less than 0.75 by using a colorimeter.
9. The method as claimed in claim 6, wherein the step of testing the glass cover plate for a touch panel comprises:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
step two, evenly applying force to the surface of the cover plate glass with qualified appearance by the hundred-grid scraper, and cutting a 5 cm-long cutting mark from left to right;
rotating the cover plate glass by 90 degrees, repeating the action of the second step, and finally completing cross-shaped cutting marks to form 100 small grids;
cleaning the scraps on the surface of the cover plate glass by using a brush;
step five, taking a section of adhesive tape with the length of 7cm, adhering the adhesive tape to the cross-shaped cutting mark on the cover plate glass from left to right by using hand power, and extruding air between the adhesive tape and the cover plate glass to enable the adhesive tape to be tightly attached to the cover plate glass;
step six, rapidly tearing the adhesive tape from left to right in 1 second;
and step seven, checking the adhesion degree of paint blocks formed by the ink in the torn adhesive tape.
10. The method of claim 6, wherein the standard for testing artificial sweat is that the cover glass has no surface irregularities, and the artificial sweat is prepared from the following raw materials: 20g/l of sodium chloride, 17.5 g/l of ammonium chloride, 5 g/l of urea, 2.5 g/l of acetic acid, 15 g/l of lactic acid and 80 g/l of sodium hydroxide, and adjusting the pH value to 4.7, wherein the specific test steps are as follows:
taking out cover plate glass to be detected and checking whether the appearance meets the standard;
dripping 10 drops of prepared artificial sweat on the surface of the cover plate glass, wherein each drop is about 0.05ml, and the spacing distance is 10 mm;
placing the sample in a constant temperature and humidity box, setting the temperature of the constant temperature and humidity box to be 75 ℃, the humidity to be 90 percent and the testing time to be 24 hours;
step four, after 24 hours of testing, setting the temperature of the constant temperature and humidity box to be 250 ℃, the humidity to be 50 percent and the testing time to be 2 hours, so that the cover plate glass reaches the constant temperature;
and step five, taking out the cover plate glass, immediately washing the area on which the artificial sweat is dripped by using common tap water, and then checking.
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