CN112759271B

CN112759271B - Ultrathin glass material and preparation method thereof

Info

Publication number: CN112759271B
Application number: CN202110237306.9A
Authority: CN
Inventors: 周智英
Original assignee: Shenzhen Yangguang Crystal Glass Technology Co ltd
Current assignee: Shenzhen Yangguang Crystal Glass Technology Co ltd
Priority date: 2021-03-03
Filing date: 2021-03-03
Publication date: 2022-09-16
Anticipated expiration: 2041-03-03
Also published as: CN112759271A

Abstract

The application relates to the field of glass products, and particularly discloses an ultrathin glass material and a preparation method thereof, wherein the ultrathin glass material comprises a glass substrate and an isolating layer adhered to the surface of the glass substrate; the glass substrate is prepared from the following raw materials in parts by weight: 70-90 parts of silicon dioxide, 4-8 parts of boron oxide, 2-6 parts of aluminum oxide, 4-7 parts of bismuth oxide, 2-5 parts of nano glass fiber and 2-5 parts of zinc oxide nano fiber; the preparation method comprises the following steps: preparing a glass substrate, and bonding an isolation layer on the outer surface of the glass substrate to obtain an ultrathin glass material; the finished product has good transmittance and transparency and good impact strength.

Description

Ultrathin glass material and preparation method thereof

Technical Field

The application relates to the field of glass products, in particular to an ultrathin glass material and a preparation method thereof.

Background

Glass is a silicate-based non-metallic material formed by fusing together silica and other chemicals; the glass comprises plate glass, bottle glass, foam glass, lead glass, toughened glass, wired glass, laminated glass and the like.

The thickness of the glass can influence the transparency and the light transmittance of the glass, along with the increasing improvement of the living standard of people, the requirements of people on the transparency and the light transmittance of the glass are gradually increased, compared with the common glass, the ultrathin glass has higher transparency, is cleaner, brighter and more attractive to use, and the thinner the glass is, the lighter the weight is, the better the light transmittance is, and the ultrathin glass is more and more valued by people.

The surface of the ultrathin glass is smoother, and the ultrathin glass can be applied to products such as photo frame glass, high-grade cosmetic mirror, lamp decoration and the like; the ultrathin glass has high sensitivity and is light and convenient, and can be applied to products such as mobile phones, televisions, watches, tablet computers, electronic screens and the like, so that the application of the ultrathin glass is wider.

The thickness of the ultra-thin glass as the toughened film is generally 0.3-0.5mm, because the glass needs to be polished and ground to be continuously reduced in the preparation process, if the thickness is required to be less than 0.3mm, the self impact strength of the toughened film is reduced, so that the thickness of the existing toughened film is mostly 0.3-0.5mm and even thicker, but the light transmittance and transparency of the thicker toughened film are poor.

Therefore, it is urgently needed to prepare an ultrathin glass material which is thinner than the existing toughened film and is used as the toughened film, so that the ultrathin glass material has good transmittance and transparency and good impact strength.

Disclosure of Invention

In order to prepare an ultrathin glass material which is thinner than the existing toughened film and is used as the toughened film, the ultrathin glass material has good transmittance and transparency and good impact strength, the application provides the ultrathin glass material and a preparation method thereof.

In a first aspect, the present application provides an ultra-thin glass material, which adopts the following technical scheme:

an ultrathin glass material comprises a glass substrate and an isolating layer adhered to the surface of the glass substrate;

the glass substrate is prepared from the following raw materials in parts by weight: 70-90 parts of silicon dioxide, 4-8 parts of boron oxide, 2-6 parts of aluminum oxide, 4-7 parts of bismuth oxide, 2-5 parts of nano glass fiber and 2-5 parts of zinc oxide nano fiber.

By adopting the technical scheme, the nano glass fiber and the zinc oxide nano fiber are matched to improve the impact strength of the glass substrate, the bonding effect between the raw materials in the glass substrate is improved, the higher elastic modulus of the nano glass fiber and the zinc oxide nano fiber is utilized to improve the toughness of the glass substrate, so that the glass substrate not only has higher impact strength but also has higher toughness, and when the prepared ultrathin glass material is used as a toughened film, the ultrathin glass material can be thinner, has better transparency and light transmittance and has better impact resistance.

Preferably, the glass substrate is prepared by the following method:

i, weighing silicon dioxide, boron oxide, aluminum oxide and bismuth oxide, mixing and stirring to obtain a mixture;

II, weighing nano glass fiber and zinc oxide nano fiber, adding the nano glass fiber and the zinc oxide nano fiber into the mixture prepared in the step I, heating to 1100-1550 ℃ while stirring, and stirring for 5-20min to prepare glass liquid;

III, standing the glass liquid prepared from the II for 2-12min, then cooling to 500-580 ℃, and then carrying out quenching to prepare glass frit;

IV, sequentially cutting, cleaning, grinding, cleaning, flat grinding and polishing, cleaning and drying the glass material prepared from the step III to prepare a cutting material; and V, spraying isoprene rubber in a molten state on four sides of the cutting material prepared by IV, wherein the thickness of the isoprene rubber is 0.2-0.7mm after the isoprene rubber is cured, spraying isoprene rubber in a molten state on two sides of the cutting material, and the thickness of the isoprene rubber is 0.02-0.08mm after the isoprene rubber is cured, thus preparing the glass substrate.

Through adopting above-mentioned technical scheme, behind the tempering membrane pasted the cell-phone screen, because the cell-phone often collides with, then lead to tempering membrane edge angle position department to produce cracked easily to make the cracked department of glass material produce most advanced or make cracked department become sharp easily, most of users can not in time change to the cracked tempering membrane of edge, when cell-phone user's hand when touching the screen, touch most advanced or sharp position department easily, thereby stab easily or fish tail user's hand.

Isoprene rubber under four sides spraying molten state of cutting material, isoprene rubber plays the guard action to the border position department of tempering membrane after the solidification, receive when tempering membrane and destroy the back, isoprene rubber can not break away from tempering membrane side, touch after damaged position department when user's hand, user's hand also can not directly contact with most advanced or sharp position department under isoprene rubber's isolation to point end or sharp position department fish tail or the hand of stabbing the user after avoiding tempering membrane damage.

When the tempering membrane does not receive the destruction, the isolation layer can obstruct oxygen in the external environment and contact with the glass substrate surface, when the tempering membrane produces fragmentation, the isolation layer is damaged, the isoprene rubber on glass substrate surface cooperatees with the isoprene rubber of glass substrate side, along with live time's extension, isoprene rubber is ageing gradually, thereby smooth glass substrate point-out or sharp position department, make point-out position or sharp position department form the radian, thereby avoid point-out or sharp position department fish tail or the hand of pricking the user after the tempering membrane damage.

Preferably, the step II further comprises the following raw materials in parts by weight: 1-4 parts of nano silver powder and 1-3 parts of mica powder.

Isoprene rubber, nano silver powder, mica powder and zinc oxide nano fibers are matched, the higher heat conduction effect of the nano silver powder and the mica powder is matched with the photocatalysis effect of the zinc oxide nano fibers, so that the isoprene rubber is promoted to be oxidized, and the oxidized isoprene rubber is sticky, so that the sharp position or the sharp position is flattened, and the hand of a user of a mobile phone is prevented from being pricked or scratched when the hand touches a screen.

The isoprene rubber contains carbon-carbon double bonds, oxidation reaction is easy to occur, and polar groups such as hydroxyl groups, carboxyl groups and the like are increased, so that the isoprene rubber becomes viscous, and the phenomenon that the sharp end or the sharp position pricks or scratches the hand of a user is avoided.

The mica powder, the nano silver powder and the zinc oxide nano fiber are matched, and the better heat conduction effect of the mica powder, the nano silver powder and the nano glass fiber is utilized to increase the temperature at the crushing position; the aggregation effect of the nano zinc oxide on ultraviolet rays is matched, so that the ultraviolet rays at the crushing positions have stronger effects; simultaneously, the better photocatalysis effect of external oxygen effect and nanometer zinc oxide can accelerate the oxidation and aging of broken position, so that the isoprene rubber at the broken position of the toughened film can be accelerated to be oxidized under the conditions of oxygen, heat and ultraviolet rays, and the isoprene rubber can be thickened, thereby avoiding pricking or scratching the hand of a user at the sharp end or the sharp position.

Preferably, the grinding in step iv is to grind the glass frit in a grinding fluid, wherein the grinding fluid is prepared from the following raw materials in parts by weight: 25-45 parts of rare earth, 5-15 parts of hydroxyapatite, 3-10 parts of perlite, 2-6 parts of absolute ethyl alcohol and 75-105 parts of water.

By adopting the technical scheme, the grinding efficiency of the glass can be improved by matching the rare earth, the hydroxyapatite, the perlite, the absolute ethyl alcohol and the water phase; the rare earth, the hydroxyapatite and the perlite are dispersed more uniformly in the anhydrous ethanol water solution, the perlite has a water absorption effect, the volume of the perlite after water absorption is slightly expanded, and the expanded perlite has a stronger grinding effect on the surface of the glass by matching with higher strength of the perlite; the rare earth and the hydroxyapatite are filled in the pores between the perlite particles, so that the grinding effect of the grinding fluid on the glass surface is further improved.

Preferably, the particle size of the rare earth in the grinding fluid in the step IV is 800-1500nm, the particle size of the hydroxyapatite is 1000-3500nm, and the particle size of the perlite is 1-5 μm.

Through adopting above-mentioned technical scheme, inject the particle diameter of tombarthite, hydroxyapatite, pearlite for the tombarthite can be arranged in the hole between pearlite granule and the pearlite granule, perhaps is arranged in hydroxyapatite granule and pearlite granule hole, thereby is convenient for large tracts of land and glass surface contact, improves the grinding effect.

Preferably, the flat grinding and polishing in step iv is to put the glass frit into a polishing solution for polishing and grinding, wherein the polishing solution is prepared from the following raw materials in parts by weight: 25-45 parts of rare earth polishing powder, 3-8 parts of absolute ethyl alcohol and 85-120 parts of water.

By adopting the technical scheme, the rare earth polishing powder is uniformly dispersed in the absolute ethyl alcohol and the water, so that the glass is conveniently subjected to flat grinding and polishing, no defect is generated on the periphery of the glass, the flatness and smoothness of the surface of the glass are improved, and the glass substrate is thinner and has better transparency and light transmittance.

Preferably, the isolation layer is a polystyrene film.

Through adopting above-mentioned technical scheme, the polystyrene film has higher transparency and surface gloss, and have higher hardness, rigidity, receive the impact back when the tempering membrane, the polystyrene film can be together broken along with glass substrate, make isoprene rubber in the glass substrate, silver nanoparticle powder, mica powder, zinc oxide nanofiber and the external environment oxygen contact after the breakage in, thereby make isoprene rubber oxidation become sticky, thereby smooths point and sharp position department, avoid stabbing, fish tail user's hand.

Preferably, the glass substrate and the isolation layer are bonded by a binder, and the binder consists of the fully transparent PVC special glue and the nano titanium dioxide in a weight ratio of (10-15): 1.

By adopting the technical scheme, the bonding layer formed after the binder is cured has the effects of ultraviolet resistance and oxygen resistance by matching the special PVC glue and the nano titanium dioxide, and the isoprene rubber in the glass substrate is prevented from aging in the use process of the toughened film; the PVC glue has higher bonding performance and transparency, and the ultrathin glass material has higher transparency by utilizing the matching of the special PVC glue and the polystyrene film, and the polystyrene film can be firmly bonded on the surface of the glass substrate.

In a second aspect, the present application provides a method for preparing an ultra-thin glass material, which adopts the following technical scheme:

a preparation method of an ultrathin glass material comprises the following steps:

and S1, preparing a glass substrate, and bonding the isolation layer on the outer surface of the glass substrate to obtain the ultrathin glass material.

By adopting the technical scheme, the preparation process is simple and convenient, the industrial production is easy to realize, and the ultrathin glass material is thinner, and has higher light transmittance, transparency and higher impact strength.

In summary, the present application has the following beneficial effects:

1. the nano glass fiber and the zinc oxide nano fiber are matched, so that the impact strength of the glass substrate is improved, and the prepared ultrathin glass material can be thinner, has better transparency and light transmittance and has better impact resistance when being used as a toughened film.

2. Isoprene rubber, nano silver powder, mica powder and zinc oxide nano fibers are matched, the higher heat conduction effect of the nano silver powder and the mica powder is matched with the photocatalysis effect of the zinc oxide nano fibers, so that the isoprene rubber is promoted to be oxidized, and the oxidized isoprene rubber is sticky, so that the sharp position or the sharp position is flattened, and the hand of a user of a mobile phone is prevented from being pricked or scratched when the hand touches a screen.

3. The mica powder and the zinc oxide nano-fiber are matched, so that the compatibility of isoprene rubber and nano-silver powder in other glass raw materials can be improved, and the surface of the glass substrate is smoother and flatter.

4. The thickness of the isoprene rubber after the four sides of the cutting material are cured is 0.2-0.7mm, so that the isoprene rubber can still be connected after the toughened film is broken, and the isoprene rubber cannot be separated from the glass substrate along with the breakage of the toughened film; the thickness of the isoprene rubber on the two sides of the cutting material after curing is 0.02-0.08mm, so that the transparency and the light transmission of the toughened film can be ensured, and the isoprene rubber can be matched with the isoprene rubber on the side edge of the cutting material, so that the hand of a user can be prevented from being scratched or pricked at the tip or the sharp position of the toughened film after being damaged.

Detailed Description

The present application will be described in further detail with reference to examples.

Preparation example of polishing slurry

The following raw materials, namely neodymium oxide, praseodymium oxide and yttrium oxide, are purchased from Kyork New materials Co., Ltd; hydroxyapatite was purchased from the scientific biotechnology limited under Wuhan Hua. Perlite is purchased from Hengxin perlite, Inc., Yongqing county; absolute ethanol was purchased from denna chemical ltd; other raw materials and equipment are all sold in the market.

Preparation example 1: the grinding fluid is prepared by the following method:

weighing 35kg of rare earth, 10kg of hydroxyapatite, 6kg of perlite, 4kg of absolute ethyl alcohol and 90kg of water, mixing, and stirring at the rotating speed of 650r/min for 5min to prepare grinding fluid; the rare earth is neodymium oxide, the particle size of the neodymium oxide is 1200nm, the particle size of the hydroxyapatite is 2200nm, and the particle size of the perlite is 3.5 mu m.

Preparation example 2: the grinding fluid is prepared by the following method:

weighing 25kg of rare earth, 5kg of hydroxyapatite, 3kg of perlite, 2kg of absolute ethyl alcohol and 75kg of water, mixing, and stirring at the rotating speed of 650r/min for 5min to prepare grinding fluid; the rare earth is praseodymium oxide, the particle size of the praseodymium oxide is 800nm, the particle size of the hydroxyapatite is 1000nm, and the particle size of the perlite is 1 mu m.

Preparation example 3: the grinding fluid is prepared by the following method:

weighing 45kg of rare earth, 15kg of hydroxyapatite, 10kg of perlite, 6kg of absolute ethyl alcohol and 105kg of water, mixing, and stirring at the rotating speed of 650r/min for 5min to prepare grinding fluid; the rare earth is yttrium oxide, the grain diameter of the yttrium oxide is 1500nm, the grain diameter of the hydroxyapatite is 3500nm, and the grain diameter of the perlite is 5 μm.

The rare earth in the above raw materials includes but is not limited to neodymium oxide, praseodymium oxide, yttrium oxide.

Preparation example of polishing solution

Cerium oxide polishing powder in the following raw materials is purchased from New materials of Foshan Lansu, Inc.; absolute ethanol was purchased from denna chemical ltd; other raw materials and equipment are all sold in the market.

Preparation example 4: the polishing solution is prepared by the following method:

weighing 35kg of rare earth polishing powder, 5kg of absolute ethyl alcohol and 100kg of water, and stirring and mixing at the rotating speed of 550r/min for 5min to prepare polishing solution; wherein the rare earth polishing powder is cerium oxide polishing powder, and the particle size of the cerium oxide polishing powder is 500 nm.

Preparation example 5: the polishing solution is prepared by the following method:

weighing 25kg of rare earth polishing powder, 3kg of absolute ethyl alcohol and 85kg of water, and stirring and mixing at the rotating speed of 550r/min for 5min to prepare polishing solution; wherein the rare earth polishing powder is cerium oxide polishing powder, and the particle size of the cerium oxide polishing powder is 400 nm.

Preparation example 6: the polishing solution is prepared by the following method:

weighing 45kg of rare earth polishing powder, 8kg of absolute ethyl alcohol and 120kg of water, and stirring and mixing at the rotating speed of 550r/min for 5min to prepare polishing solution; wherein the rare earth polishing powder is cerium oxide polishing powder, and the particle size of the cerium oxide polishing powder is 600 nm.

The rare earth polishing powder in the above raw materials includes, but is not limited to, cerium oxide polishing powder.

Preparation example of glass substrate

Silicon dioxide among the following raw materials was purchased from Shandong Sertoli New Material Co., Ltd; boron oxide was purchased from Hubei Xin run chemical Co., Ltd; alumina was purchased from spherical alumina manufactured by Innovative materials science and technology, Inc. of hong Kong, Neng Gangrui; bismuth oxide was purchased from the industrial promotion chemical company Limited of Wuhan Ji; the nano glass fiber is purchased from nano glass fiber powder produced by Fucai mineral products Limited company in the east China sea county; the zinc oxide nano-fiber is purchased from Sichuan research science and technology Limited; isoprene rubber was purchased from trans-1, 4-polyisoprene manufactured by Wuxi Megwang plasticized materials Co.Ltd; the mica powder is white mica powder produced by mineral processing factories in Lingshou county, and the specification is 40 meshes; the nano silver powder is purchased from science and technology limited company in Shijiazhuang bamboo, and the specification is 0.00005 mm; other raw materials and equipment are all sold in the market.

Preparation example 7: the glass substrate is prepared by the following method:

weighing 80kg of silicon dioxide, 6kg of boron oxide, 4kg of aluminum oxide and 5.5kg of bismuth oxide, mixing, and stirring at the rotating speed of 500r/min for 6min to obtain a mixture;

II, weighing 3.5kg of nano glass fiber and 3.5kg of zinc oxide nano fiber, adding into the mixture prepared in the step I, stirring at a rotating speed of 350r/min, heating to 1350 ℃ at a heating speed of 10 ℃/min while stirring, and stirring for 14min to prepare glass liquid;

III, standing the glass liquid prepared from the II for 7min, then cooling to 540 ℃, and then carrying out quenching to prepare glass material;

IV, cutting the glass material prepared from the III, washing the cut glass material with water, drying, grinding the glass material in the grinding fluid prepared in the preparation example 1 at the rotating speed of 550r/min for 5min, taking out the glass material, washing with water and drying to prepare a grinding material;

v, putting the grinding material prepared by IV into the polishing solution prepared in the preparation example 4, grinding for 18min at the rotating speed of 450r/min, and then washing and drying to prepare a cutting material;

VI, heating isoprene rubber to 140 ℃ to obtain isoprene rubber in a molten state, spraying the isoprene rubber in the molten state on four sides of a cutting material prepared by V, wherein the thickness of the isoprene rubber after being cured is 0.5mm, spraying the isoprene rubber in the molten state on two sides of the cutting material, and the thickness of the isoprene rubber after being cured is 0.05mm, thus obtaining the glass substrate.

Preparation example 8: the glass substrate is prepared by the following method:

weighing 70kg of silicon dioxide, 4kg of boron oxide, 2kg of aluminum oxide and 4kg of bismuth oxide, mixing, and stirring at the rotating speed of 500r/min for 6min to obtain a mixture;

II, weighing 2kg of nano glass fiber and 2kg of zinc oxide nano fiber, adding the nano glass fiber and the zinc oxide nano fiber into the mixture prepared in the step I, stirring at a rotating speed of 350r/min, heating to 1100 ℃ at a heating speed of 10 ℃ per min while stirring, and stirring for 5min to prepare glass liquid;

III, standing the glass liquid prepared from the II for 2min, then cooling to 500 ℃, and then carrying out quenching to prepare glass frit; IV, cutting the glass material prepared from the step III, washing the cut glass material with water, drying, grinding the glass material in the grinding fluid prepared in the preparation example 2 at the rotating speed of 300r/min for 30min, taking out the glass material, washing with water and drying to prepare the grinding material;

v, placing the grinding material prepared by IV in the polishing solution prepared in the preparation example 5, grinding for 25min at the rotating speed of 200r/min, and then washing and drying to prepare a cutting material;

VI, heating isoprene rubber to 140 ℃ to obtain isoprene rubber in a molten state, spraying the isoprene rubber in the molten state on four sides of a cutting material prepared by V, wherein the thickness of the isoprene rubber after being cured is 0.2mm, spraying the isoprene rubber in the molten state on two sides of the cutting material, and the thickness of the isoprene rubber after being cured is 0.02mm to obtain the glass substrate.

Preparation example 9: the glass substrate is prepared by the following method:

weighing 90kg of silicon dioxide, 8kg of boron oxide, 6kg of aluminum oxide and 7kg of bismuth oxide, mixing, and stirring at the rotating speed of 500r/min for 6min to obtain a mixture;

II, weighing 5kg of nano glass fiber and 5kg of zinc oxide nano fiber, adding the nano glass fiber and the zinc oxide nano fiber into the mixture prepared in the step I, stirring at a rotating speed of 350r/min, heating to 1550 ℃ at a heating speed of 10 ℃ per min while stirring, and stirring for 20min to prepare glass liquid;

III, standing the molten glass prepared from the II for 12min, then cooling to 580 ℃, and then carrying out quenching to prepare glass frit; IV, cutting the glass material prepared from the III, washing the cut glass material with water, drying, grinding the glass material in the grinding liquid prepared in the preparation example 3 at the rotating speed of 850r/min for 5min, taking out the glass material, washing with water and drying to prepare the grinding material;

v, putting the grinding material prepared by IV into the polishing solution prepared by the preparation example 6, grinding for 10min at the rotating speed of 750r/min, and then washing and drying to prepare a cutting material;

VI, heating isoprene rubber to 140 ℃ to obtain isoprene rubber in a molten state, spraying the isoprene rubber in the molten state on four sides of a cutting material prepared by V, wherein the thickness of the isoprene rubber after being cured is 0.7mm, spraying the isoprene rubber in the molten state on two sides of the cutting material, and the thickness of the isoprene rubber after being cured is 0.08mm to obtain the glass substrate.

Preparation example 10: the difference between the preparation example and the preparation example 7 is that:

and II, weighing 3.5kg of nano glass fiber, 3.5kg of zinc oxide nano fiber, 3kg of nano silver powder and 2kg of mica powder, adding into the mixture prepared in the step I, stirring at a rotating speed of 350r/min, heating to 1350 ℃ at a heating speed of 10 ℃/min while stirring, and stirring for 14min to prepare the glass liquid.

Preparation example 11: the difference between this preparation and preparation 7 is that:

and II, weighing 3.5kg of nano glass fiber, 3.5kg of zinc oxide nano fiber, 1kg of nano silver powder and 1kg of mica powder, adding the nano glass fiber, the zinc oxide nano fiber, the nano silver powder and the mica powder into the mixture prepared in the step I, stirring at a rotating speed of 350r/min, heating to 1350 ℃ at a heating speed of 10 ℃/min while stirring, and stirring for 14min to prepare the glass liquid.

Preparation example 12: the difference between this preparation and preparation 7 is that:

and II, weighing 3.5kg of nano glass fiber, 3.5kg of zinc oxide nano fiber, 4kg of nano silver powder and 3kg of mica powder, adding into the mixture prepared in the step I, stirring at a rotating speed of 350r/min, heating to 1350 ℃ at a heating speed of 10 ℃/min while stirring, and stirring for 14min to prepare the glass liquid.

Examples

Polystyrene films among the following raw materials were purchased from tianjingchi technologies ltd; the nano titanium dioxide is purchased from Hangzhou Jikang New materials Co., Ltd; the special PVC glue is purchased from the polyurethane adhesive product company Limited in Dongguan; other raw materials and equipment are all sold in the market.

Example 1: the preparation method of the ultrathin glass material comprises the following steps:

s1, selecting the glass substrate prepared in preparation example 7, wherein the thickness of the glass substrate is 0.1mm, coating an adhesive on the upper surface of the glass substrate, adhering an isolation layer on the outer surface of the glass substrate, and drying at room temperature for 30min to obtain an ultrathin glass material; the isolating layer is a polystyrene film, and the binder consists of fully transparent PVC special glue and nano titanium dioxide in a weight ratio of 12: 1; the adhesive is solidified to form an adhesive layer, the thickness of the adhesive layer is 0.01mm, the thickness of the polystyrene film is 0.01mm, and the thickness of the ultrathin glass material is 0.12 mm.

Example 2: the preparation method of the ultrathin glass material comprises the following steps:

s1, selecting the glass substrate prepared in preparation example 8, wherein the thickness of the glass substrate is 0.18mm, coating an adhesive on the upper surface of the glass substrate, adhering an isolation layer on the outer surface of the glass substrate, and drying at room temperature for 30min to obtain an ultrathin glass material; the isolating layer is a polystyrene film, and the binder consists of the fully transparent PVC special glue and the nano titanium dioxide in a weight ratio of 15: 1; the adhesive is solidified to form an adhesive layer, the thickness of the adhesive layer is 0.01mm, the thickness of the polystyrene film is 0.01mm, and the thickness of the ultrathin glass material is 0.2 mm.

Example 3: the preparation method of the ultrathin glass material comprises the following steps:

s1, selecting the glass substrate prepared in preparation example 9, wherein the thickness of the glass substrate is 0.06mm, coating an adhesive on the upper surface of the glass substrate, adhering the isolation layer on the outer surface of the glass substrate, and drying at room temperature for 30min to obtain the ultrathin glass material; the isolating layer is a polystyrene film, and the binder consists of fully transparent PVC special glue and nano titanium dioxide in a weight ratio of 10: 1; the adhesive is solidified to form an adhesive layer, the thickness of the adhesive layer is 0.01mm, the thickness of the polystyrene film is 0.01mm, and the thickness of the ultrathin glass material is 0.08 mm.

Example 4: the present embodiment is different from embodiment 1 in that:

the glass substrate prepared in preparation example 10 was used as the glass substrate.

Example 5: the present embodiment is different from embodiment 1 in that:

the glass substrate prepared in preparation example 11 was used as the glass substrate.

Example 6: the present embodiment is different from embodiment 1 in that:

the glass substrate prepared in preparation example 12 was used as the glass substrate.

The barrier layer in the above raw materials includes, but is not limited to, a polystyrene film.

Comparative example

Comparative example 1: the comparative example differs from example 1 in that: the zinc oxide nano-fiber is not added in the glass substrate raw material.

Comparative example 2: this embodiment is different from embodiment 4 in that: the glass base material is not added with nano silver powder and mica powder.

Comparative example 3: the present embodiment is different from embodiment 1 in that: during the preparation of the glass substrate:

and V, putting the grinding material prepared by IV into the polishing solution prepared in the preparation example 4, grinding for 18min at the rotating speed of 450r/min, and then washing and drying to obtain the glass substrate.

Comparative example 4: this comparative example is different from example 1 in that the ultra-thin glass material is made of only a glass substrate.

Comparative example 5: this example differs from example 1 in that the barrier layer is a polyethylene film.

Comparative example 6: the example is different from example 1 in that perlite is not added to the raw material of the polishing slurry when the glass substrate is prepared.

Comparative example 7: the example differs from example 1 in that: when the glass substrate is prepared, the particle size of the rare earth in the grinding fluid is 1 micron, the particle size of the hydroxyapatite is 1 micron, and the particle size of the perlite is 1 micron.

Performance test

1. Detection of light transmission performance of glass substrate

Glass substrates were prepared according to the preparation methods of examples 1 to 6 and comparative examples 1 to 7, respectively, and the transmittance of the glass substrates was measured using a WGT-S transmittance haze meter (purchased from Qile electronics, Inc., Suzhou, model WGT-S) and data was recorded.

Glass substrate impact strength performance detection

The preparation methods of examples 1-6 and comparative examples 1-7 are respectively adopted to prepare glass substrates, 15-55g of steel balls (the weight difference of the steel balls is 5g) are respectively selected to vertically fall from the height of 20cm, when the surface of the glass substrate is crushed, the weight of the steel balls is recorded, the crushing degree is recorded, and the crushing degree is 0-10 minutes from complete crushing to no damage.

And detecting the strength performance of the ultrathin glass material

The preparation methods of examples 1-6 and comparative examples 1-7 are respectively adopted to prepare ultrathin glass materials as toughened films, 15-55g of steel balls (the weight difference of the steel balls is 5g) are respectively selected to vertically fall from the height of 20cm, the weight of the steel balls is recorded when the surface of a glass substrate is crushed, the crushing degree is recorded, and the crushing degree is 0-10 minutes from complete crushing to no damage.

Safety performance detection of broken ultrathin glass material

The preparation methods of the embodiments 1 to 6 and the comparative examples 1 to 7 are respectively adopted to prepare the ultrathin glass materials as toughened films, 55g of steel balls are selected to destroy the edge positions of the toughened films, so that the edge positions of the toughened films are cracked, the cracked positions generate tips or the ends are sharp, and the tips or the sharp positions of the ends generated at the edge cracked positions of the toughened films are scored after 15 days.

The scoring criteria were as follows: the finger pricking and the end parts are sharp, so that fingers are easy to be injured accidentally without pricking, the end parts are not sharp, and the finger pricking are not easy to be injured accidentally with the score of 0-10.

TABLE 1 testing of glass substrates and ultra-thin glass materials

As can be seen by combining examples 1-3 and examples 4-6 and table 1, the light transmittance of the glass substrates prepared in examples 4-6 is slightly lower than that of examples 1-3 by adding isoprene rubber, nano silver powder and mica powder into the raw materials of examples 4-6, compared with examples 1-3, the impact strength of the glass substrates prepared in examples 4-6 is better than that of the ultra-thin glass materials prepared in examples 1-3 and 4-6, and the end part of the toughened film prepared in examples 4-6 at the breaking position is gentle, and the end part and the tip part are not easy to prick or scratch the hand of a user; the matching of the isoprene rubber, the nano silver powder, the mica powder and the zinc oxide nano fibers is demonstrated, the impact strength of the glass substrate can be improved, the higher heat conduction effect of the nano silver powder and the mica powder is matched with the photocatalysis effect of the zinc oxide nano fibers, the isoprene rubber is promoted to be oxidized, and the oxidized isoprene rubber is sticky, so that the sharp position or the pointed position is smoothed, and the situation that the hand of a mobile phone user is pricked or scratched at the pointed position or the sharp position when the hand touches a screen is avoided.

As can be seen by combining examples 1 to 3 and comparative examples 1 to 7 and by combining table 1, the transmittance of the glass substrate prepared in comparative example 1 is slightly higher than that of the glass substrate prepared in example 1 compared to example 1 without adding the zinc oxide nanofibers in the glass substrate raw material of comparative example 1, but the impact strength of the glass substrate prepared in comparative example 1 is lower than that of the ultra-thin glass material prepared in example 1 and comparative example 1, and the tip or end position of the tempered film prepared in comparative example 1 is easy to prick or scratch the hand of a user compared to example 1; the nano glass fiber and the zinc oxide nano fiber are matched, and the glass substrate is thinner and has good impact strength through tightly connecting materials.

Comparative example 2 when the glass substrate is prepared, the nano silver powder and the mica powder are not added to the raw materials, comparative example 3 when the glass substrate is prepared, the isoprene rubber is not added to the raw materials, compared to example 4, the impact strength of the glass substrate prepared by comparative examples 2 and 3 is reduced compared to example 4, the impact strength of the ultra-thin glass material prepared by comparative examples 2 and 3 is reduced compared to example 4, and simultaneously the tip or end position of the tempered film prepared by comparative examples 2 and 3 is easy to prick or scratch the hand of a user compared to example 1; the nano silver powder, the cloud rice powder and the isoprene rubber are bonded with the glass substrate raw materials, so that the glass substrate is tightly connected with the raw materials inside, has high transparency and good impact strength while having high transmittance, and the hand of a user is not easily damaged or scratched by explosion at the tip or the sharp position of the broken position of the toughened film.

Comparative example 4 when the ultra-thin glass material is prepared, the surface of the glass substrate is not bonded with the isolating layer, the isolating layer of comparative example 5 is a polyethylene film, compared with example 1, the impact strength of the ultra-thin glass material prepared by comparative examples 4 and 5 is lower than that of the ultra-thin glass material prepared by example 1, and the tip or end position of the toughened film prepared by comparative examples 4 and 5 is easy to prick or scratch the hand of a user compared with example 1; explain the isolation layer can separate oxygen among the external environment and ultraviolet ray and the isoprene rubber among the glass substrate contact, thereby make the glass substrate have higher shock resistance, select for use the polystyrene film as the isolation layer not only can not influence the light transmissivity of glass substrate simultaneously, the transparency, can also be together broken with the glass substrate at the polystyrene film when the glass substrate is strikeed, make the isoprene rubber among the glass substrate contact with the oxygen among the external environment, thereby promote the ageing formation coating of isoprene rubber among the glass substrate, avoid tempering membrane most advanced or sharp position department to prick or fish tail user's hand.

Comparative example 6 in preparing a glass substrate, perlite is not added to the abrasive slurry, the light transmittance and transparency of the glass substrate prepared in comparative example 6 are reduced compared to example 1, and the impact strength of the glass substrate prepared in comparative example 6 is lower than those of the glass substrate prepared in example 1, and the impact strength of the ultra-thin glass material prepared in comparative example 6 is reduced compared to example 1; the perlite, the rare earth and the hydroxyapatite are matched to be used as grinding fluid, so that the surface of the glass can be ground more smoothly, the thickness of each position of the glass substrate is uniform, and the impact strength of the glass substrate and the ultrathin glass material is improved.

Comparative example 7 in preparing a glass substrate in which a rare earth particle size is 1 μm, a hydroxyapatite particle size is 1 μm, and a perlite particle size is 1 μm, the glass substrate prepared in comparative example 7 has a light transmittance and a transparency reduced as compared with example 1, and the glass substrate prepared in comparative example 7 has an impact strength lower than those of the glass substrate prepared in example 1 and the ultra-thin glass material prepared in comparative example 7 has a reduced impact strength as compared with example 1; the particle size of the rare earth, the particle size of the hydroxyapatite and the particle size of the perlite are matched, so that the rare earth can be filled in the pores between the perlite particles or between the hydroxyapatite particles and the pores of the perlite particles, the grinding efficiency is improved, the surface of the glass substrate is smoother and smoother, when the glass substrate is impacted by external force, the impact force can be uniformly dispersed, and the impact strength of the glass substrate is improved.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims

1. An ultrathin glass material is characterized by comprising a glass substrate and an isolating layer adhered to the surface of the glass substrate;

the glass substrate is prepared from the following raw materials in parts by weight: 70-90 parts of silicon dioxide, 4-8 parts of boron oxide, 2-6 parts of aluminum oxide, 4-7 parts of bismuth oxide, 2-5 parts of nano glass fiber, 2-5 parts of zinc oxide nano fiber, 1-4 parts of nano silver powder and 1-3 parts of mica powder;

the glass substrate is prepared by the following method:

II, weighing nano glass fiber, zinc oxide nano fiber, nano silver powder and mica powder, adding into the mixture prepared in the step I, heating to 1100-;

IV, sequentially cutting, cleaning, grinding, cleaning, flat grinding and polishing, cleaning and drying the glass material prepared from the step III to prepare a cutting material;

and V, spraying isoprene rubber in a molten state on four sides of the cutting material prepared by IV, wherein the thickness of the isoprene rubber is 0.2-0.7mm after the isoprene rubber is cured, spraying isoprene rubber in a molten state on two sides of the cutting material, and the thickness of the isoprene rubber is 0.02-0.08mm after the isoprene rubber is cured, thus preparing the glass substrate.

2. The ultra-thin glass material of claim 1, wherein: and the grinding in the step IV is to grind the glass frit in grinding fluid, wherein the grinding fluid is prepared from the following raw materials in parts by weight: 25-45 parts of rare earth, 5-15 parts of hydroxyapatite, 3-10 parts of perlite, 2-6 parts of absolute ethyl alcohol and 75-105 parts of water.

3. The ultra-thin glass material of claim 2, wherein: in the step IV, the particle size of the rare earth of the grinding fluid is 800-1500nm, the particle size of the hydroxyapatite is 1000-3500nm, and the particle size of the perlite is 1-5 mu m.

4. The ultra-thin glass material of claim 1, wherein: and step IV, flat grinding and polishing, namely putting the glass material into polishing solution for polishing and grinding, wherein the polishing solution is prepared from the following raw materials in parts by weight: 25-45 parts of rare earth polishing powder, 3-8 parts of absolute ethyl alcohol and 85-120 parts of water.

5. The ultra-thin glass material of claim 1, wherein: the isolation layer is a polystyrene film.

6. The ultrathin glass material of claim 1, wherein the glass substrate and the isolation layer are bonded by a binder, and the binder comprises the glue specially used for the fully transparent PVC and the nano titanium dioxide in a weight ratio of 10-15: 1.

7. A method of making an ultra-thin glass material as claimed in any of claims 1 to 6, comprising the steps of: