TW202210437A - Temporary protective film capable of reducing heat treatment cost of glass and heat treatment method thereof - Google Patents

Abstract

The invention discloses a temporary protective film capable of reducing the heat treatment cost of glass and a heat treatment method thereof. According to the invention, a glass substrate is provided; the surface of the glass substrate is sprayed with a functional coating layer; the surface of the functional coating layer is coated with the temporary protective film; the temporary protective film can be heated and dried through IR and then hardened through UV irradiation, and the wavelength range of rays used for UV irradiation is 245-395 nm, and the optimal range is 280-350 nm; and the temporary protective film can be removed by thermal decomposition or combustion. According to the temporary protective film capable of reducing the heat treatment cost of glass and the heat treatment method thereof, the temporary protective film has good heat absorptivity, he heat treatment cost of the glass can be reduced, production efficiency can be improved, and meanwhile, the temporary protective film has the function of protecting a coated layer on coated glass from damage (corrosion, oxidation or scratching) caused by the influence of the outside.

Description

Temporary protective film that can reduce the cost of heat treatment of glass, and its coating structure and heat treatment method

The present invention relates to the field of glass production and processing, and in particular to the field of temporary protective films that can reduce the cost of glass heat treatment.

During the glass tempering process, when the temperature is not properly controlled, there will be temperature differences between different positions on the glass surface, resulting in glass bending; the heating process is the main process of the tempering furnace and the most important process affecting the final tempering quality of the glass. The low-emissivity coated glass containing the silver film layer has low mechanical strength and is easy to be scratched and not resistant to wear. Therefore, it is extremely important to reduce the production cost of the glass and to provide protection for the glass.

In order to overcome the deficiencies in the prior art, the present invention provides a temporary protective film that can reduce the cost of heat treatment of glass, a protective film coating structure and a heat treatment method. Improve production efficiency, and at the same time have the function of protecting the coating layer on the coated glass from being affected by the outside world, which may cause the coating layer to be damaged (for example, resistant to corrosion, oxidation or scratches).

One object of the present invention is to provide a temporary protective film that can reduce the cost of heat treatment of glass, which is applied to a glass substrate, the surface of the glass substrate is sprayed with a functional coating layer, and the surface of the functional coating layer is coated with a protective film The protective liquid can be dried by infrared heating, and then hardened by ultraviolet irradiation to form a protective film. The wavelength range used for ultraviolet irradiation is 245nm to 395nm, and the optimal range is 280nm to 350nm. The protective film can pass Thermal decomposition or combustion removal. Further, the protective liquid constituting the protective film includes at least one polyester acrylate or epoxy acrylate prepolymer; at least one acrylate compound, which is an acrylate monomer, prepolymer or polymer, and selected from the group consisting of: From mono-, di- or trifunctional acrylate monomers; at least one polymerization initiator; at least one infrared absorber.

The total weight of the protective film is: (1) At least one polyester acrylate or epoxy acrylate prepolymer, accounting for 25% to 75% by weight of the protective film; (2) At least one acrylate compound selected from mono-, di- or tri-functional acrylate monomers, accounting for 20% to 70% by weight of the protective film; (3) The polymerization initiator accounts for 3% to 15% of the total weight of the acrylate compound; and (4) The infrared absorber accounts for 0.5% to 5% of the total weight of the acrylate compound.

Wherein, the infrared absorber can be selected from at least one of the following: metal oxides such as magnesium oxide, calcium oxide, aluminum oxide, silicon oxide, titanium oxide, etc.; hydroxides such as lithium hydroxide, aluminum hydroxide, magnesium hydroxide, calcium hydroxide, etc. carbonates such as magnesium carbonate and calcium carbonate; sulfates such as potassium sulfate, magnesium sulfate and calcium sulfate; phosphates such as lithium phosphate, potassium phosphate and sodium phosphate; magnesium silicate, calcium silicate, aluminum silicate, etc. Silicates, like this, allow for more uniform heating to reduce costs.

The thickness of the protective film is at least 5 μm, and the protective film is insoluble in water, so as to effectively achieve the effects of preventing moisture and corrosion.

The ratio of this protective film embodiment: (1) Polyester acrylate: it is an amine-modified polyester acrylate, accounting for 55% by weight of the protective film; (2) Acrylate monomer: it is 1,6-hexanediol dimethacrylate, accounting for 40% by weight of the protective film; (3) Infrared absorber: it is titanium dioxide, accounting for 1% by weight of the protective film; (4) Polymerization initiator: it is 1-hydroxycyclohexyl phenyl ketone, accounting for 4% by weight of the protective film.

Another object of the present invention is to provide a protective film coating structure for making the temporary protective film as described in the foregoing object, the protective film coating structure includes a first conveyor belt and a coating box structure, A protective liquid recovery tank is arranged below the first conveyor belt, and a dosing device is arranged in the protective liquid recovery tank. The structural spacing of the coating box is set right above the first conveyor belt, and the output of the dosing device The end is connected to the coating box structure, and the coating box structure is provided with a dose regulating valve. The output end of the dose regulating valve corresponds to the glass base on which the functional coating layer is sprayed on the first conveyor belt. A second conveyor belt is connected to the end of the first conveyor belt, and a drying device is installed on the side of the second conveyor belt, and the drying device includes at least one infrared heater, The output ends of the infrared heaters face the surface of the protective film, and the infrared heaters are arranged at intervals. The air pipes of the infrared heaters are converged and connected to an evacuation pipeline, and the input end of the air extractor is connected to the evacuation. pipes to dry and harden and draw out pungent gases.

Another object of the present invention is to provide a heat treatment method for a temporary protective film that can reduce the cost of heat treatment of glass. The cost of heat treatment of glass can be reduced through the following steps. The first step is to select a variety of glasses when tempering the glass. Compare the types of glass, and determine the optimal glass type with better tempering performance according to the tempering performance parameters obtained by different types; glass types are: ordinary white glass, single-silver tempered glass, double-silver tempered glass and three Silver-coated steel glass; Step 2: Test the quality of the tempered glass by changing the thickness of the protective film, the time of exposure to oxidation resistance, the hardness of the pencil, and the operation of edging; and The third step: when tempering the glass, change the tempering heat treatment parameters to temper the glass, and then test the tempering index to judge the quality after tempering; tempering heat treatment parameters include preheating time, heating time, Preheat temperature and heating temperature.

In this way, it can achieve good heat absorption, reduce the cost of heat treatment of glass, improve production efficiency, and can also provide coating glass with physical protection from scratches and scratches, provide excellent storage protection, avoid oxidation of silver-containing coating layer, and apply infrared rays. The absorbent can be heated more evenly during tempering heat treatment, effectively reducing the cost of glass heat treatment and improving product quality.

In order to facilitate your examination committee to be able to further understand and understand the purpose of the present invention, technical features and effects thereof, the following examples are given to coordinate the drawings, and the detailed description is as follows:

Please refer to Figures 1 to 3, a temporary protective film that can reduce the cost of heat treatment of glass, which can be applied to a glass substrate a, the surface of the glass substrate is sprayed with a functional coating layer b, the functional The surface of the coating layer b is coated with a protective liquid, which can be heated and dried by infrared (IR), and then hardened by ultraviolet (UV) irradiation to form a protective film c, wherein the wavelength range used for UV irradiation is 245 nm to 395 nanometers (nm), the optimal range is 280 nm to 350 nm, the protective film c can be removed by thermal decomposition or burning, so that it can provide protection such as physical scratches and scratches on the coated glass, and can provide Excellent storage protection, a protective film that avoids oxidation of the silver-containing coating layer, and can be removed by thermal decomposition or combustion, solving the shortcomings of other forms of protective film.

The protective liquid constituting the protective film c includes: (1) At least one polyester acrylate or epoxy acrylate prepolymer, this protective film c mainly comprises an organic material of the (meth)acrylate polymer type, the chemical formulation of which enables rapid and complete combustion during heat treatment , while it produces only easily removable volatile molecules during decomposition.

(2) At least one acrylate monomer, prepolymer or polymer, which is selected from mono-, di- or tri-functional acrylate monomers; the acrylate compound can be selected from mono-functional and multi-functional acrylate monomers; body, such as: Monofunctional acrylates such as: methyl methacrylate, ethyl methacrylate, hexyl methacrylate, cyclohexyl methacrylate, 2-ethylhexyl methacrylate, 2-ethyl methacrylate Oxyethyl, phenoxyethyl methacrylate, hydroxyethyl acrylate, hydroxypropyl methacrylate, vinyl methacrylate, caprolactone acrylate, isobornyl methacrylate, lauryl methacrylate , Polypropylene monomethacrylate, etc.

Difunctional acrylates such as: 1,4-Butanediol dimethacrylate, Ethylene dimethacrylate, 1,6-Hexanediol dimethacrylate, Bisphenol A dimethacrylate , Trimethylolpropane diacrylate, triethylene glycol diacrylate, ethylene glycol dimethacrylate, polyethylene dimethacrylate, tricyclodecane dimethylol diacrylate, etc. Trifunctional acrylates such as: trimethylolpropane trimethacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, ethoxylated trimethylolpropane triacrylate, tripropylene glycol triacrylate esters, etc.

(3) At least one polymerization initiator, wherein the polymerization initiator depends on the form selected to be hardened, for example, in the case of thermal hardening, a polymerization initiator of the benzyl peroxide type is used; In the hardened form, a photopolymerization initiator is used, wherein the photopolymerization initiator can be selected from at least one of the following: 2-hydroxy-2-methyl-1-phenyl-1-propanone, 2-hydroxy-4-(2 -Hydroxyethoxy)-2-methylpropiophenone, 1-hydroxycyclohexyl phenyl ketone, 2,2-dimethoxy-2-phenylacetophenone, diphenyl (2,4,6 - trimethylbenzyl) phosphine oxide.

(4) At least one infrared absorber, which can make heating more uniform during tempering heat treatment, and can effectively reduce the cost of glass heat treatment.

The total weight ratio of the protective film c is: (1) At least one polyester acrylate or epoxy acrylate prepolymer, accounting for 25% to 75% by weight of the protective film c; (2) at least one acrylate compound, which is selected from mono-, di- or tri-functional acrylate monomers, and accounts for 20% to 70% by weight of the protective film c; (3) The polymerization initiator accounts for 3% to 15% of the total weight of the acrylate compound; (4) The infrared absorber accounts for 0.5% to 5% of the total weight of the acrylate compound.

The infrared absorber can be selected from at least one of the following: metal oxides such as magnesium oxide, calcium oxide, aluminum oxide, silicon oxide, and titanium oxide; hydroxides such as lithium hydroxide, aluminum hydroxide, magnesium hydroxide, and calcium hydroxide; Magnesium carbonate, calcium carbonate and other carbonates; potassium sulfate, magnesium sulfate, calcium sulfate and other sulfates; lithium phosphate, potassium phosphate, sodium phosphate and other phosphates; magnesium silicate, calcium silicate, aluminum silicate and other silicic acids salts.

The thickness of the protective film c is at least 5 microns, and the protective film c is insoluble in water. This water-insoluble protective film c allows for effective protection and against moisture and corrosion during the processing step.

The ratio of the protective film c embodiment: (1) Polyester acrylate: it is Amine modified polyester acrylate, accounting for 55% by weight of the protective film c; (2) Acrylate monomer: it is 1,6-hexanediol dimethacrylate, accounting for 40% by weight of the protective film c; (3) Infrared absorber: it is titanium dioxide, accounting for 1% by weight of the protective film c; (4) Polymerization initiator: 1-Hydroxycyclohexyphenyl ketone (1-Hydroxycyclohexyphenyl ketone), accounting for 4% by weight of the protective film c.

The protective film c of the present invention is particularly aimed at strengthening the glass during heat treatment, allowing it to be removed by thermal decomposition, its chemical formulation enables the protective film c to burn quickly and completely during the heat treatment, and only produces during its decomposition Volatile molecules that are easy to remove can moderately reduce the temperature of the tempered glass process to save energy.

Please refer to FIG. 1 again, in the embodiment of the present invention, the protective film c can be formed by a protective film coating structure d, the protective film coating structure d includes, a first conveyor belt d1 and a Coating box structure d2, a protective liquid recovery tank d3 is arranged under the first conveyor belt d1, and a dosing device d4 is arranged in the protective liquid recovery tank d3, and the coating box structure d2 is arranged at a distance from the first conveyor. Just above the belt d1, and the output end of the dosing device d4 is connected to the coating box structure d2, during the process of applying the protective liquid, a part of the protective liquid will fall into the protective liquid recovery tank d3, and then pass through The dosing device d4 is withdrawn and replenished into the coating box structure d2 to improve the utilization rate. In addition, the coating box structure d2 is provided with a drug volume regulating valve d5, and the output end of the drug volume regulating valve d5 will Corresponding to the surface of the glass substrate a on which the functional coating layer b is sprayed on the first conveyor belt d1, the protective liquid in the coating box structure d2 controls the liquid output through the dose adjustment valve d5, and then evenly spreads On the surface of the glass substrate a sprayed with the functional coating layer b, a protective film c is formed, which plays a role of temporary protection. The conveying speed (20 m/min to 100 m/min) can be adjusted according to the required thickness of the protective film c; the thickness of the protective film c ranges from 1 micron to 50 microns (μm).

Please refer to Fig. 2 again, the end of the first conveyor belt d1 is connected with a second conveyor belt h, and a drying device e is disposed on the side of the second conveyor belt h, and the drying device e includes at least one infrared heating device. device e1, the output ends of each of the infrared heaters e1 will face the surface of the protective film c respectively, and each of the infrared heaters e1 is arranged at a distance, and the gas pipes of each of the infrared heaters e1 are converged and communicated with the evacuation pipeline f, and the evacuation The input end of the machine is connected to the evacuation pipe f, so as to remove the pungent odor generated during drying, which can effectively prevent environmental pollution and avoid human damage. Wherein, the infrared heating temperature is 150 degrees to 300 degrees, and the conveying speed of the second conveyor belt is 0.5 m/min to 20 m/min.

In the embodiment of the present invention, go through the following steps: Step 1: When tempering the glass, select a variety of glass types for comparative experiments, and determine the optimal glass type with better tempering performance according to the tempering performance parameters obtained from different types. The glass types are: ordinary White glass, single silver steel glass, double silver steel glass and triple silver steel glass, among them, ordinary white glass is ordinary transparent glass; the structure of single silver steel glass is arranged on ordinary white glass in sequence. Dielectric layer, protective layer, functional layer, protective layer, dielectric layer; the structure of double-silver steel glass is that on ordinary white glass, dielectric layer, protective layer, functional layer, protective layer, dielectric layer, protective layer are arranged in sequence , functional layer, protective layer, dielectric layer; the structure of the three-silver steel glass is on the ordinary white glass, and the dielectric layer, the protective layer, the functional layer, the protective layer, the dielectric layer, the protective layer, the functional layer, the protective layer are arranged in sequence. layer, dielectric layer, protective layer, functional layer, protective layer, dielectric layer.

Step 2: Test the quality of the glass tempered by changing the thickness of the protective film c, the time of exposure to oxidation resistance, the pencil hardness (that is, the pencil hardness is used as the test standard) and the operation of edging;

The third step: when tempering the glass, change the tempering heat treatment parameters to temper the glass, and then test the tempering index to judge the quality after tempering; tempering heat treatment parameters include: preheating time, heating time , preheating temperature and heating temperature.

Examples of glass tempering tests are as follows: Tempering factory standard indicators: bow (factory standard ≤ 0.1%); waveform (factory standard ≤ 0.05%); particle size (factory standard ≥ 40 grains/25cm2); stress (factory standard ≥ 90MPa);

In the first embodiment of the present invention, the selected glass type is ordinary white glass; tempering test parameters: (1) Heat treatment parameter setting: preheating time 230 seconds (s); heating time 220s; preheating temperature 615°C/610°C; heating temperature 665°C/660°C; The first group: protective film thickness: 0μm; pencil hardness: 5H; bow shape: 0.07%; waveform: 0.026%; particle size: 44 grains; stress: 90Mpa; The second group: protective film thickness: 15μm; pencil hardness: 8H; edging test: film is not dissolved; bow shape: 0.05%; waveform: 0.022%; particle size: 68 grains; stress: 95Mpa; Transmittance before steel: 84.5; transmittance after steel: 89.4; (2) Optimized heat treatment parameter settings: preheating time 200s; heating time 190s; preheating temperature 610°C/605°C; heating temperature 665°C/655°C; The third group: protective film thickness: 15μm; bow shape: 0.03%; waveform: 0.024%; particle size: 45 grains; stress: 90Mpa; steel quality: no residue;

According to the above example 1, the protective film c will not be washed off during deep processing and edging, and can protect the glass film layer. In addition, the water of the edging and processing machine is changed from high-cost ultrapure water to ordinary tap water Process film, save production cost; in tempering process, it can shorten the heating time of tempering furnace, improve production efficiency, make glass heat more evenly during tempering, reduce tempering warpage around the edge of glass, increase glass carrier plate rate, reducing energy consumption by 15%.

In the second embodiment of the present invention, the selected glass type is single-silver tempered glass; tempering test parameters: Heat treatment parameter setting: preheating time 230s; heating time 220s; preheating temperature 615°C/610°C; heating temperature 665°C/660°C; The first group: protective film thickness: 0μm; bare anti-oxidation time (H): 162; pencil hardness: 2H; bow: 0.07%; waveform: 0.026%; particle size: 38 grains; stress: 87Mpa; : 67.1; transmittance after steel is 68.2; The second group: protective film thickness: 15μm; bare anti-oxidation time (H): 980; pencil hardness: 6H; edging test: film is not dissolved; bow shape: 0.06%; waveform: 0.024%; particle size: 56 grains; Stress: 93Mpa; quality after steel: no residue; transmittance before steel: 64.2; transmittance after steel: 68.2;

According to the above-mentioned second embodiment, the protective film c will not be washed off during deep-processing edging, and can protect the glass film layer. In addition, the water of the edging and processing machine is changed from high-cost ultrapure water to ordinary tap water It saves production costs and improves the processing resistance and oxidation resistance of tempered glass. During tempering, it can shorten the heating time of the tempering furnace, improve production efficiency, and make the glass more evenly heated during tempering. The tempering and warping around the edge of the small glass increases the glass carrier rate and reduces the energy consumption by 20%; the water-insoluble protective film c can change the outer packaging method of single-silver steel glass products, and reduce the packaging materials and labor costs of the coating. .

In the third embodiment of the present invention, the selected glass type is double-silver tempered glass; tempering test parameters: Heat treatment parameter setting: preheating time 200s; heating time 190s; preheating temperature 610℃/605℃; heating temperature 665℃/655℃; The first group: protective film thickness: 0μm; bare anti-oxidation time (H): 74; pencil hardness: 4B; bow: 0.06%; waveform: 0.028%; particle size: 42 grains; stress: 93Mpa; : 67; transmittance after steel is 75.3; The second group: protective film thickness: 15μm; bare anti-oxidation time (H): 720; pencil hardness: 6H; edging test: film is not dissolved; bow shape: 0.05%; waveform: 0.025%; particle size: 55 grains; Stress: 93Mpa; quality after steel: no residue; transmittance before steel: 63.8; transmittance after steel: 75.3;

According to the above-mentioned third embodiment, the protective film c will not be washed off during the deep processing edging, and can protect the glass film layer. In addition, the water of the edging processor is changed from the high-cost ultrapure water to ordinary tap water Film processing saves production costs and improves the processing resistance and oxidation resistance of steel glass for deep processing; during tempering processing, using ordinary white glass material for strengthening treatment can shorten the heating time of the tempering furnace, improve production efficiency, and make The glass is heated more evenly during tempering, reducing the tempering warpage around the edge of the glass and increasing the glass carrier rate.

In the fourth embodiment of the present invention, the selected glass type is three-silver tempered glass; tempering test parameters: (1) Heat treatment parameter setting: preheating time 245s; heating time 240s; preheating temperature 620°C/615°C; heating temperature 670°C/661°C; The first group: protective film thickness: 0μm; bare anti-oxidation time (H): 28; pencil hardness: 5B; bow: 0.05%; waveform: 0.026%; particle size: 40 grains; stress: 86Mpa; : 48.4; transmittance after steel is 55; The second group: protective film thickness: 15μm; bare anti-oxidation time (H): 360; pencil hardness: 4H; edging test: film is not dissolved; bow shape: 0.05%; waveform: 0.022%; particle size: 42 grains; Stress: 92Mpa; quality after steel: no residue; transmittance before steel: 44.2; transmittance after steel: 55; (2) Optimized heat treatment parameter settings: preheating time 210s; heating time 205s; preheating temperature 620°C/615°C; heating temperature 670°C/661°C; The third group: protective film thickness: 15μm; bow shape: 0.03%; waveform: 0.024%; particle size: 45 grains; stress: 90Mpa; steel quality: no residue.

Through the above-mentioned Example 4, it can be concluded that the protective film c will not be washed off during the deep processing of edging, and can protect the glass film layer. In addition, the water of the edging and processing machine is changed from high-cost ultrapure water to ordinary tap water The film processing can save production costs; the pencil hardness is significantly improved, which improves the processing resistance and oxidation resistance of the deep processing of the steel glass; when the Sanyinke steel glass products are tempered, the heating time of the tempering furnace is shortened, and the production efficiency is improved about 25%; no residue after tempering and heating, easy to process and does not affect product performance.

The results of the above examples show that: 1. In the tempering process, using ordinary white glass materials for strengthening treatment can shorten the heating time of the tempering furnace, improve the production efficiency, make the glass more evenly heated during tempering, reduce the tempering warpage around the edge of the glass, and increase the production efficiency. Glass carrier rate, saving power consumption; 2. During deep-processing edging, the protective film c will not be washed off, which can protect the glass film layer. In addition, the water of the edging and washing machine is changed from the high-cost ultrapure water to ordinary tap water to wash the film, which saves the production cost; 3. Improve the processing resistance and oxidation resistance of steel glass deep processing; 4. Spraying the water-insoluble temporary protective film c can change the outer packaging method of Kegang LOW-E and reduce the packaging material and labor cost of LOW-E coating.

According to the above, it is only a preferred embodiment of the present invention, but the scope of the rights claimed by the present invention is not limited to this. The equivalent changes that can be easily considered should all belong to the protection scope of the present invention.

a: glass substrate b: functional coating layer c: protective film d: protective film coating structure d1: The first conveyor belt d2: coating box structure d3: protective liquid recovery tank d4: Dosing device d5: Dosage control valve e: drying device e1: Infrared heater f: Evacuate the pipe h: Second conveyor belt

[Figure 1] is a structural diagram of the protective film coating; [Fig. 2] is a structural diagram of a drying device; and [Fig. 3] It is a structural diagram of glass coating.

a: glass substrate

b: functional coating layer

c: protective film

Claims (10)

A temporary protective film that can reduce the cost of glass heat treatment is applied to a glass substrate, the surface of the glass substrate is sprayed with a functional coating layer, the surface of the functional coating layer is coated with a protective liquid, and the protective liquid can pass infrared rays Heating and drying, and then hardening by ultraviolet irradiation to form a protective film, wherein the wavelength range used for ultraviolet irradiation is 245 nm to 395 nm, and the optimal range is 280 nm to 350 nm. The protective film can pass Thermal decomposition or combustion removal. The temporary protective film as claimed in claim 1, wherein the protective liquid constituting the protective film comprises: at least one polyester acrylate or epoxy acrylate prepolymer; at least one acrylate compound, which is an acrylate monomer, prepolymer or polymer, and which is selected from mono-, di- or trifunctional acrylate monomers; at least one polymerization initiator; and At least one infrared absorber. The temporary protective film according to claim 2, wherein the total weight of the protective film accounts for: At least one polyester acrylate or epoxy acrylate prepolymer, accounting for 25% to 75% by weight of the protective film; At least one acrylate compound selected from mono-, di- or tri-functional acrylate monomers, accounting for 20% to 70% by weight of the protective film; The polymerization initiator accounts for 3% to 15% of the total weight of the acrylate compound; and The infrared absorber accounts for 0.5% to 5% of the total weight of the acrylate compound. The temporary protective film according to claim 2, wherein the infrared absorber can be selected from at least one of the following: metal oxides such as magnesium oxide, calcium oxide, aluminum oxide, silicon oxide or titanium oxide; lithium hydroxide, hydroxide Hydroxides such as aluminum, magnesium hydroxide or calcium hydroxide; carbonates such as magnesium carbonate or calcium carbonate; sulfates such as potassium sulfate, magnesium sulfate or calcium sulfate; phosphates such as lithium phosphate, potassium phosphate or sodium phosphate; Silicates such as magnesium silicate, calcium silicate or aluminum silicate. The temporary protective film of claim 1, wherein the protective film has a thickness of at least 5 microns. The temporary protective film according to claim 1, wherein the protective film is insoluble in water. The temporary protective film of claim 1, wherein the protective film comprises: Polyester acrylate, which is amine-modified polyester acrylate, accounting for 55% by weight of the protective film; Acrylate monomer, which is 1,6-hexanediol dimethacrylate, accounts for 40% by weight of the protective film; An infrared absorber, which is titanium dioxide, accounts for 1% by weight of the protective film; and The polymerization initiator, which is 1-hydroxycyclohexyl phenyl ketone, accounts for 4% by weight of the protective film. A protective film coating structure for making the temporary protective film as described in any one of claims 1 to 7, wherein the protective film coating structure comprises a first conveyor belt and a coating box structure, A protective liquid recovery tank is arranged under the first conveyor belt, and a dosing device is arranged in the protective liquid recovery tank. Connected to the coating box structure, the coating box structure is provided with a dose regulating valve, and the output end of the dose regulating valve corresponds to the glass substrate on which the functional coating layer is sprayed on the first conveyor belt. surface. The protective film coating structure according to claim 8, wherein a second conveyor belt is connected to the end of the first conveyor belt, a drying device is disposed on the side of the second conveyor belt, and the drying device includes at least one infrared ray The heater, the output end of each infrared heater faces the surface of the protective film, and the infrared heaters are arranged at intervals, the gas transmission pipes of each infrared heater are converged and connected to an evacuation pipeline, and the input end of the air extractor is connected to The evacuated pipe. A heat treatment method for a temporary protective film that can reduce the cost of heat treatment of glass, which is used to make the temporary protective film as described in any one of claims 1 to 7, characterized in that the first step: tempering the glass When processing, select a variety of glass types for comparative experiments, and determine the optimal glass type with better tempering performance according to the tempering performance parameters obtained by different types; glass types are: ordinary white glass, single silver steel glass, double Yinke steel glass and triple silver steel glass; Step 2: Test the quality of the tempered glass by changing the thickness of the protective film, exposure to oxidation resistance, pencil hardness and edging; and The third step: when tempering the glass, change the tempering heat treatment parameters to temper the glass, and then test the tempering index to judge the quality after tempering; tempering heat treatment parameters include preheating time, heating time, Preheat temperature and heating temperature.

Images