CN105621902A - Packaging method for vacuum glass - Google Patents
Packaging method for vacuum glass Download PDFInfo
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- CN105621902A CN105621902A CN201510996921.2A CN201510996921A CN105621902A CN 105621902 A CN105621902 A CN 105621902A CN 201510996921 A CN201510996921 A CN 201510996921A CN 105621902 A CN105621902 A CN 105621902A
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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
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/06—Joining glass to glass by processes other than fusing
- C03C27/08—Joining glass to glass by processes other than fusing with the aid of intervening metal
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- Geochemistry & Mineralogy (AREA)
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- Joining Of Glass To Other Materials (AREA)
Abstract
The invention provides a packaging method for vacuum glass. The method comprises the following steps of 1 pretreatment, 2 silver paste coating, 3 curing, 4 tempering, 5 low-melting-point metal coating, 6 stacking and 7 packaging. According to the packaging method, silver paste is used for being compounded with low-melting-point metal to form packaging slurry, the silver paste is specifically-made low-smelting-point sliver paste, ingredient composition is reasonable, environment friendliness is achieved, and due to the low melting point, the packaging cost is low, and sealing is even; the sealing effect is good after packaging, the sealed state can be kept for a long time, the service life can be prolonged, market prospects can be widened, production cost can be effectively reduced, and production benefits can be improved.
Description
Technical field
The present invention relates to the method for packing of a kind of vacuum glass.
Background technology
Vacuum glass is by airtight for two panels sheet glass surrounding, its gap is evacuated and seal vents, gap between two panels glass is 0.1-0.2mm, the two panels of vacuum glass generally has at least a slice to be low emissivity glass, so just dropping to minimum by the heat scattered and disappeared by the conduction of vacuum glass, convection current and radiation mode, its principle of work is identical with the heat insulating principle of glass vacuum-bottle. Vacuum glass is glasswork and Materials science, vacuum technique, physical measurement techniques, industrial automation and architecture science etc., the outstanding achievement of multiple subject, multiple technologies, kinds of processes cooperate.
Vacuum glass is a kind of novel energy-conserving glass, and it is based on vacuum flask principle, two panels glass surrounding is sealed, and midfeather is the thin vacuum layer of 0.1-0.2mm. Owing to not having gas heat-transfer, internal surface has had again the transparent low-radiation film of vacuum flask silverskin effect, makes the thermal and insulating performance of vacuum glass be much better than " hollow " glass widely used at present.
But, vacuum glass is being manufactured in process, the seal degree of its encapsulation, determining the height of its performance perameter, in existing market, many simply to adopt seal gum to carry out hermetically sealed for major part vacuum glass, encapsulates insecure, the sealing effect of encapsulation is general, long-time use after, there will be poorly sealed situation, affect vacuum glass work-ing life.
To this, the current domestic following patent documentation of main existence:
Such as patent publication No.: 104291662A, disclose a kind of glass solder welding, groove edge sealing plane toughened vacuum glass be made up of upper glass and lower-glass, it is characterized in that the periphery of upper glass has edge sealing bar frame, the periphery of lower-glass has edge sealing groove, the periphery of upper glass and lower-glass is welded together by glass solder, a closed vacuum layer is formed between upper glass and lower-glass, having upholder in vacuum layer, upholder has one layer or two layers; Edge sealing bar frame and upholder are made up of toughened glass ink and superpolymer compound, superpolymer first makes performed polymer, again performed polymer is prepared on toughened glass ink after glass tempering, last performed polymer is solidified into elastomerics at ambient temperature or elevated temperature, performed polymer or elastomerics can adapt to the change of vacuum layer height automatically, and elastomerics gets rid of the volatile gases contained by self under high temperature, high vacuum; The method of the present invention is easy to realize mechanize, automatic production, it is possible to the toughened vacuum glass of big batch making high-performance, low cost. But, the packaged material that this patent provides is toughened glass ink and/or superpolymer, and superpolymer first makes performed polymer, but only relies on superpolymer to realize sealing, and its sealing effect remains to be discussed.
And for vacuum glass encapsulation glass powder or slurry, the current domestic following patent documentation of main existence:
Patent publication No.: CN102515534A, discloses a kind of glass-encapsulated colloidal sol and preparation method and glass encapsulation method and vacuum glass thereof; This glass-encapsulated colloidal sol contains Pb simple substance or Pb compound, and its preparation method, comprising: step S1: measure glass powder with low melting point; Step S2: configure the first solvent; Step S3: configuration the 2nd solvent; Step S4: configuration the 3rd solvent; Step S5: described glass powder with low melting point is mixed with the first solvent, the 2nd solvent and the 2nd solvent. This vacuum glass comprises the first substrate of glass and the 2nd substrate of glass; First substrate of glass and the 2nd substrate of glass are packaged as a whole by above-mentioned glass-encapsulated colloidal sol, are provided with vacuum cavity between the first substrate of glass and the 2nd substrate of glass. This glass encapsulation method is apply above-mentioned glass-encapsulated colloidal sol along the first substrate of glass outer, and arranges upholder thereon, is then pressed afterwards by the first substrate of glass, dries, has vacuumized. The present invention has colloidal sol good uniformity, and resistance to air loss is good, the advantage that bond strength is high. But, in the glass-encapsulated colloidal sol that this patent provides, containing plumbous, this kind of material all can impact to environment and to production, user.
Summary of the invention
For solving above-mentioned Problems existing, it is an object of the invention to provide the method for packing of a kind of vacuum glass, described method for packing adopts silver slurry composite low melting point metal to form packaging slurry, and silver slurry is special low melting point silver slurry, becoming to be grouped into reasonable, environmentally friendly, low melting point makes packaging cost low, and sealing is evenly, and good sealing effect after encapsulation, sealed state can be ensured for a long time, promote work-ing life, expand market outlook, effectively reduce production cost, promote production benefit.
For achieving the above object, the technical scheme of the present invention is:
A method for packing for vacuum glass, comprises the steps:
1) pre-treatment
Get two sheet glass, carry out edging, chamfering, decontamination, deoil, wash, drying treatment;
2) coating silver slurry
Respectively in step 1) process after every block sheet glass a plane on coating silver slurry, formed silver slurry layer, coating method be along described sheet glass one side circumference coating, form a framework;
3) solidify
By step 2) process after two blocks of sheet glass respectively send into solidification baker in carry out heat temperature raising solidification treatment, cool to room temperature with the furnace;
4) tempering
By step 3) described sheet glass carries out tempering process;
5) low melting point metal is applied
In step 4) silver slurry layer surface-coated one layer of low melting point metal of two blocks of sheet glass after process, form low-melting-point metal layer;
6) stacking
By staggered relatively for the one side of two sheet glass coating silver slurry layers, after alignment, superposition up and down, leaves exhaust-duct between two sheet glass;
7) encapsulate
By step 6) two sheet glass after stacking send into vacuum edge sealing stoves, it is evacuated to��-0.1Pa, heat temperature raising, heat-up time is 2��3h, until silver slurry layer between described two sheet glass and low-melting-point metal layer melting, chimeric under the effect of two sheet glass self gravitations, stop heating, it is cooled to room temperature with stove, completes the encapsulation of described vacuum glass.
Further, described low melting point metal is tin, bismuth, indium or lead.
Separately, the melt temperature of described low melting point metal is 300��400 DEG C.
Separately have, described silver slurry comprises the composition of following weight part: silver powder: 40��50 parts, vinyl alcohol: 20��30 parts, tripoly phosphate sodium STPP: 10��20 parts, epoxy acrylate: 10��20 parts, alkenyl succinic acid ester: 5��10 parts, polyacrylamide: 5��10 parts, Sodium dodecylbenzene sulfonate: 1��5 part, sintering aids: 1��5 part, inorganic additives: 1��5 part.
Preferably, described silver slurry comprises the composition of following weight part: silver powder: 40��45 parts, vinyl alcohol: 20��25 parts, tripoly phosphate sodium STPP: 15��20 parts, epoxy acrylate: 15��20 parts, alkenyl succinic acid ester: 5��8 parts, polyacrylamide: 6��10 parts, Sodium dodecylbenzene sulfonate: 1��3 part, sintering aids: 2��5 parts, inorganic additives: 3��5 parts.
Preferably, described silver slurry comprises the composition of following weight part: silver powder: 45 parts, vinyl alcohol: 25 parts, tripoly phosphate sodium STPP: 15 parts, epoxy acrylate: 15 parts, alkenyl succinic acid ester: 6 parts, polyacrylamide: 7 parts, Sodium dodecylbenzene sulfonate: 2 parts, sintering aids: 3 parts, inorganic additives: 4 parts.
Again, the melt temperature of described silver slurry is 400��500 DEG C.
Having, described sintering aids is zinc, tin, cobalt, antimony, rhodium, ruthenium or iridium again.
And, described inorganic additives is MgO, CaO, ZrO2Or NiO.
Separately, the preparation method of described silver slurry comprises the steps:
1) described inorganic additives being put into calcining furnace to calcine 1��2 hour at 500��600 DEG C, take out and be cooled to room temperature, 20��30min is to powdery in grinding, for subsequent use;
2) get tripoly phosphate sodium STPP to put into calcining furnace and sinter 1��2 hour at 400��500 DEG C, take out and be cooled to room temperature, for subsequent use;
3) get epoxy acrylate, alkenyl succinic acid ester, polyacrylamide, Sodium dodecylbenzene sulfonate and sintering aids mixing, stir 20��30min to mixed even, grind and become slurry in 1��2 hour, obtain slurry;
4) by step 1) and step 2) gained material and vinyl alcohol and step 3) gained slurry mixes, it is warming up to 60��80 DEG C, stirring reaction 1��2 hour, being cooled to 20��30 DEG C, add silver powder, ultrasonic wave is disperseed, stir 20��30 minutes, drying, grinding to form particle diameter is 10��20 ��m of slurry grains, obtains described silver slurry.
The useful effect of the present invention is:
Described method for packing adopts silver slurry composite low melting point metal to form packaging slurry, and silver slurry is special low melting point silver slurry, becoming to be grouped into reasonable, environmentally friendly, low melting point makes packaging cost low, and sealing is evenly, and good sealing effect after encapsulation, sealed state can be ensured for a long time, promote work-ing life, expand market outlook, effectively reduce production cost, promote production benefit.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail. The technician contributing to this area is understood the present invention by following examples further, but does not limit the present invention in any form. It should be appreciated that to those skilled in the art, without departing from the inventive concept of the premise, it is also possible to make some distortion and improvement. These all belong to protection scope of the present invention.
The method for packing of a kind of vacuum glass of the present invention, comprises the steps:
1) pre-treatment
Get two sheet glass, carry out edging, chamfering, decontamination, deoil, wash, drying treatment;
2) coating silver slurry
Respectively in step 1) process after every block sheet glass a plane on coating silver slurry, formed silver slurry layer, coating method be along described sheet glass one side circumference coating, form a framework;
3) solidify
By step 2) process after two blocks of sheet glass respectively send into solidification baker in carry out heat temperature raising solidification treatment, cool to room temperature with the furnace;
4) tempering
By step 3) described sheet glass carries out tempering process;
5) low melting point metal is applied
In step 4) silver slurry layer surface-coated one layer of low melting point metal of two blocks of sheet glass after process, form low-melting-point metal layer;
6) stacking
By staggered relatively for the one side of two sheet glass coating silver slurry layers, after alignment, superposition up and down, leaves exhaust-duct between two sheet glass;
7) encapsulate
By step 6) two sheet glass after stacking send into vacuum edge sealing stoves, it is evacuated to��-0.1Pa, heat temperature raising, heat-up time is 2��3h, until silver slurry layer between described two sheet glass and low-melting-point metal layer melting, chimeric under the effect of two sheet glass self gravitations, stop heating, it is cooled to room temperature with stove, completes the encapsulation of described vacuum glass.
Further, described low melting point metal is tin, bismuth, indium or lead.
Separately, the melt temperature of described low melting point metal is 300��400 DEG C.
Separately have, described silver slurry comprises the composition of following weight part: silver powder: 40��50 parts, vinyl alcohol: 20��30 parts, tripoly phosphate sodium STPP: 10��20 parts, epoxy acrylate: 10��20 parts, alkenyl succinic acid ester: 5��10 parts, polyacrylamide: 5��10 parts, Sodium dodecylbenzene sulfonate: 1��5 part, sintering aids: 1��5 part, inorganic additives: 1��5 part.
Preferably, described silver slurry comprises the composition of following weight part: silver powder: 40��45 parts, vinyl alcohol: 20��25 parts, tripoly phosphate sodium STPP: 15��20 parts, epoxy acrylate: 15��20 parts, alkenyl succinic acid ester: 5��8 parts, polyacrylamide: 6��10 parts, Sodium dodecylbenzene sulfonate: 1��3 part, sintering aids: 2��5 parts, inorganic additives: 3��5 parts.
Preferably, described silver slurry comprises the composition of following weight part: silver powder: 45 parts, vinyl alcohol: 25 parts, tripoly phosphate sodium STPP: 15 parts, epoxy acrylate: 15 parts, alkenyl succinic acid ester: 6 parts, polyacrylamide: 7 parts, Sodium dodecylbenzene sulfonate: 2 parts, sintering aids: 3 parts, inorganic additives: 4 parts.
Again, the melt temperature of described silver slurry is 400��500 DEG C.
Having, described sintering aids is zinc, tin, cobalt, antimony, rhodium, ruthenium or iridium again.
And, described inorganic additives is MgO, CaO, ZrO2Or NiO.
Separately, the preparation method of described silver slurry comprises the steps:
1) described inorganic additives being put into calcining furnace to calcine 1��2 hour at 500��600 DEG C, take out and be cooled to room temperature, 20��30min is to powdery in grinding, for subsequent use;
2) get tripoly phosphate sodium STPP to put into calcining furnace and sinter 1��2 hour at 400��500 DEG C, take out and be cooled to room temperature, for subsequent use;
3) get epoxy acrylate, alkenyl succinic acid ester, polyacrylamide, Sodium dodecylbenzene sulfonate and sintering aids mixing, stir 20��30min to mixed even, grind and become slurry in 1��2 hour, obtain slurry;
4) by step 1) and step 2) gained material and vinyl alcohol and step 3) gained slurry mixes, it is warming up to 60��80 DEG C, stirring reaction 1��2 hour, being cooled to 20��30 DEG C, add silver powder, ultrasonic wave is disperseed, stir 20��30 minutes, drying, grinding to form particle diameter is 10��20 ��m of slurry grains, obtains described silver slurry.
Wherein, the composition list that in the method for packing of a kind of vacuum glass that table 1 provides for various embodiments of the present invention, silver is starched.
Table 1 (unit: weight part)
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| Silver powder | 45 | 43 | 48 | 40 | 50 |
| Vinyl alcohol | 25 | 23 | 20 | 28 | 30 |
| Tripoly phosphate sodium STPP | 15 | 13 | 10 | 18 | 20 |
| Epoxy acrylate | 15 | 13 | 18 | 20 | 10 |
| Alkenyl succinic acid ester | 6 | 5 | 7 | 10 | 8 |
| Polyacrylamide | 7 | 10 | 8 | 6 | 5 |
| Sodium dodecylbenzene sulfonate | 2 | 3 | 5 | 1 | 4 |
| Sintering aids | 3 | 5 | 4 | 2 | 1 |
| Inorganic additives | 4 | 3 | 2 | 5 | 1 |
The method for packing of a kind of vacuum glass provided by the present invention, described method for packing adopts silver slurry composite low melting point metal to form packaging slurry, and silver slurry is special low melting point silver slurry, becomes to be grouped into reasonable, environmentally friendly, low melting point makes packaging cost low, sealing evenly, and encapsulates rear good sealing effect, can ensure sealed state for a long time, promote work-ing life, expand market outlook, effectively reduce production cost, promote production benefit.
It should be noted that, above embodiment is only in order to illustrate the technical scheme of the present invention and unrestricted. Although with reference to better embodiment to invention has been detailed explanation, it will be understood by those within the art that, the technical scheme of invention can being modified or equivalent replacement, and not depart from the scope of technical solution of the present invention, it all should be encompassed in the right of the present invention.
Claims (10)
1. the method for packing of a vacuum glass, it is characterised in that, comprise the steps:
Pre-treatment
Get two sheet glass, carry out edging, chamfering, decontamination, deoil, wash, drying treatment;
Coating silver slurry
Respectively in step 1) process after every block sheet glass a plane on coating silver slurry, formed silver slurry layer, coating method be along described sheet glass one side circumference coating, form a framework;
Solidification
By step 2) process after two blocks of sheet glass respectively send into solidification baker in carry out heat temperature raising solidification treatment, cool to room temperature with the furnace;
Tempering
By step 3) described sheet glass carries out tempering process;
Coating low melting point metal
In step 4) silver slurry layer surface-coated one layer of low melting point metal of two blocks of sheet glass after process, form low-melting-point metal layer;
Stacking
By staggered relatively for the one side of two sheet glass coating silver slurry layers, after alignment, superposition up and down, leaves exhaust-duct between two sheet glass;
Encapsulation
By step 6) two sheet glass after stacking send into vacuum edge sealing stoves, it is evacuated to��-0.1Pa, heat temperature raising, heat-up time is 2 ~ 3h, until silver slurry layer between described two sheet glass and low-melting-point metal layer melting, chimeric under the effect of two sheet glass self gravitations, stop heating, it is cooled to room temperature with stove, completes the encapsulation of described vacuum glass.
2. the method for packing of a kind of vacuum glass according to claim 1, it is characterised in that, described low melting point metal is tin, bismuth, indium or lead.
3. the method for packing of a kind of vacuum glass according to claim 1, it is characterised in that, the melt temperature of described low melting point metal is 300 ~ 400 DEG C.
4. the method for packing of a kind of vacuum glass according to claim 1, it is characterized in that, described silver slurry comprises the composition of following weight part: silver powder: 40 ~ 50 parts, vinyl alcohol: 20 ~ 30 parts, tripoly phosphate sodium STPP: 10 ~ 20 parts, epoxy acrylate: 10 ~ 20 parts, alkenyl succinic acid ester: 5 ~ 10 parts, polyacrylamide: 5 ~ 10 parts, Sodium dodecylbenzene sulfonate: 1 ~ 5 part, sintering aids: 1 ~ 5 part, inorganic additives: 1 ~ 5 part.
5. the method for packing of a kind of vacuum glass according to claim 1, it is characterized in that, described silver slurry comprises the composition of following weight part: silver powder: 40 ~ 45 parts, vinyl alcohol: 20 ~ 25 parts, tripoly phosphate sodium STPP: 15 ~ 20 parts, epoxy acrylate: 15 ~ 20 parts, alkenyl succinic acid ester: 5 ~ 8 parts, polyacrylamide: 6 ~ 10 parts, Sodium dodecylbenzene sulfonate: 1 ~ 3 part, sintering aids: 2 ~ 5 parts, inorganic additives: 3 ~ 5 parts.
6. the method for packing of a kind of vacuum glass according to claim 1, it is characterized in that, described silver slurry comprises the composition of following weight part: silver powder: 45 parts, vinyl alcohol: 25 parts, tripoly phosphate sodium STPP: 15 parts, epoxy acrylate: 15 parts, alkenyl succinic acid ester: 6 parts, polyacrylamide: 7 parts, Sodium dodecylbenzene sulfonate: 2 parts, sintering aids: 3 parts, inorganic additives: 4 parts.
7. the method for packing of a kind of vacuum glass according to claim 1 or 4 or 5 or 6, it is characterised in that, the melt temperature of described silver slurry is 400 ~ 500 DEG C.
8. the method for packing of a kind of vacuum glass according to claim 4 or 5 or 6, it is characterised in that, described sintering aids is zinc, tin, cobalt, antimony, rhodium, ruthenium or iridium.
9. the method for packing of a kind of vacuum glass according to claim 4 or 5 or 6, it is characterised in that, described inorganic additives is MgO, CaO, ZrO2Or NiO.
10. the method for packing of a kind of vacuum glass according to claim 1 or 4 or 5 or 6, it is characterised in that, the preparation method of described silver slurry comprises the steps:
Described inorganic additives being put into calcining furnace calcine 1 ~ 2 hour at 500 ~ 600 DEG C, take out and be cooled to room temperature, 20 ~ 30min is to powdery in grinding, for subsequent use;
Get tripoly phosphate sodium STPP to put into calcining furnace and sinter 1 ~ 2 hour at 400 ~ 500 DEG C, take out and be cooled to room temperature, for subsequent use;
Get epoxy acrylate, alkenyl succinic acid ester, polyacrylamide, Sodium dodecylbenzene sulfonate and sintering aids mixing, stir 20 ~ 30min to mixed even, grind and become slurry in 1 ~ 2 hour, obtain slurry;
By step 1) and step 2) gained material and vinyl alcohol and step 3) gained slurry mixes, it is warming up to 60 ~ 80 DEG C, stirring reaction 1 ~ 2 hour, being cooled to 20 ~ 30 DEG C, add silver powder, ultrasonic wave is disperseed, stir 20 ~ 30 minutes, drying, grinding to form particle diameter is 10 ~ 20 ��m of slurry grains, obtains described silver slurry.
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| CN201510996921.2A CN105621902B (en) | 2015-12-28 | 2015-12-28 | A kind of method for packing of vacuum glass |
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| CN201510996921.2A CN105621902B (en) | 2015-12-28 | 2015-12-28 | A kind of method for packing of vacuum glass |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106986551A (en) * | 2017-04-26 | 2017-07-28 | 洛阳兰迪玻璃机器股份有限公司 | A kind of preparation method of vacuum glass metal sealing metal layer |
| CN110642535A (en) * | 2019-11-20 | 2020-01-03 | 北京工业大学 | Method for preparing vacuum glass for vacuumizing and sealing in vacuum furnace |
| CN115231829A (en) * | 2022-08-26 | 2022-10-25 | 四川英诺维新材料科技有限公司 | Sealing material for vacuum glass and preparation method thereof |
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| CN102079619A (en) * | 2009-11-27 | 2011-06-01 | 洛阳兰迪玻璃机器有限公司 | Glass plate combination sealing method |
| CN202208687U (en) * | 2011-09-08 | 2012-05-02 | 洛阳兰迪玻璃机器股份有限公司 | Automobile-used vacuum glass |
| CN203187549U (en) * | 2013-02-26 | 2013-09-11 | 中国建材检验认证集团股份有限公司 | Vacuum glass with metallic edge sealing structure |
| CN104003628A (en) * | 2013-02-26 | 2014-08-27 | 中国建材检验认证集团股份有限公司 | Vacuum glass with metal edge-sealing structure and making method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102079619A (en) * | 2009-11-27 | 2011-06-01 | 洛阳兰迪玻璃机器有限公司 | Glass plate combination sealing method |
| CN202208687U (en) * | 2011-09-08 | 2012-05-02 | 洛阳兰迪玻璃机器股份有限公司 | Automobile-used vacuum glass |
| CN203187549U (en) * | 2013-02-26 | 2013-09-11 | 中国建材检验认证集团股份有限公司 | Vacuum glass with metallic edge sealing structure |
| CN104003628A (en) * | 2013-02-26 | 2014-08-27 | 中国建材检验认证集团股份有限公司 | Vacuum glass with metal edge-sealing structure and making method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106986551A (en) * | 2017-04-26 | 2017-07-28 | 洛阳兰迪玻璃机器股份有限公司 | A kind of preparation method of vacuum glass metal sealing metal layer |
| CN110642535A (en) * | 2019-11-20 | 2020-01-03 | 北京工业大学 | Method for preparing vacuum glass for vacuumizing and sealing in vacuum furnace |
| CN115231829A (en) * | 2022-08-26 | 2022-10-25 | 四川英诺维新材料科技有限公司 | Sealing material for vacuum glass and preparation method thereof |
| CN115231829B (en) * | 2022-08-26 | 2024-01-05 | 四川英诺维新材料科技有限公司 | Sealing material for vacuum glass and preparation method thereof |
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| CN105621902B (en) | 2018-05-29 |
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