CN103602311A - Recyclable flexible nanometer sealing filler - Google Patents
Recyclable flexible nanometer sealing filler Download PDFInfo
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- CN103602311A CN103602311A CN201310444427.6A CN201310444427A CN103602311A CN 103602311 A CN103602311 A CN 103602311A CN 201310444427 A CN201310444427 A CN 201310444427A CN 103602311 A CN103602311 A CN 103602311A
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Abstract
The invention relates to a recyclable flexible nanometer sealing filler. The sealing filler is characterized by comprising 20-80 wt% of a polytetrafluoroethylene dispersion resin, 5-20 wt% of reinforcing fiber, 5-30 wt% of a lubricant, 1-10 wt% of anti-aging agent, 1-12 wt% of a nano wear-resisting agent, and 2-15 wt% of a nano filler. The sealing filler is perfect in technology, reliable in performance, long in service lifetime and time-saving and labor-saving in filling process, and can guarantee no leakage in equipment operation. The sealing filler completely and fundamentally solves difficult sealing problems of leakage for a shaft or a rod which have rotation reciprocating motion and spiral motion in various mechanical devices.
Description
Technical field
The present invention relates to a kind of flexible nano lock packing of can recirculation using, it is more perfect in technology, more time saving and energy saving when more reliable in performance, longer service life, filling, can guarantee equipment water clock not in the running, fully and completely solved and in numerous mechanical means, there is the run, drip, leak sealing difficult problem occurring in the axle of rotation to-and-fro movement, spiral motion or bar.
Not only from sealing mechanism and product material, done major tuneup, and realized the important breakthrough on product structure, both improved product work-ing life, the service efficiency ，You Wei enterprise of also having improved mechanical means has saved production cost.
Background technology
Energy-saving and cost-reducing and protection of the environment is the problem of global theme ，Ye Shi industrial enterprise pay attention to day by day.In the past few years, along with industrial expansion, numerous industries such as power station, waterworks, steelworks, petrochemical complex, colliery, mechanical equipment factory, all have higher requirement to dynamic sealing material and technology.Particularly the life-span of the use temperature of filler, medium, pressure and use all increases corresponding.So the fibrous packing of traditional asbestos, graphite, tetrafluoro braiding all can not meet present service requirements, is perplexing for a long time enterprise and production station operator.
Dynamic sealing technology exists defect in the utilization of China always, and especially the shaft end seal of pump class is continued to use traditional pressure-conducting disk root sealing method always.Ubiquity leaks, the bearing axle sleeve life-span is low, change the problems such as frequent of overhauling.
Packing is that high-abrasive material is made to fiber, and fibrage is become to rope form article, makes rope form article have the deformation performance under lower pressure.Whenever the requirement of dynamic seal but the configuration of surface of this product but can not meet the demands: article surface is uneven, and all exist the passage of seepage in axle friction.The diameter of axle is larger, and packing is just longer, and passage is just more, and namely the larger leakage of the diameter of axle is just larger.Exist in a large amount of leak path uses, these regions are in dry grinding state.
The friction pair of mechanical seal tends to adopt the material of high rigidity, high-modulus to make, and object is to improve the work-ing life of product by the high-wearing feature of material, and up-to-date product is that rubbing contact-material surface has been nano diamond coating now.
The life-span that wear resistance by material improves product is accordant to reason, and the life-span of product is depended on the wear resistance of material, if material is not wear-resisting, the life-span of product will shorten; Therefore,, since mechanically-sealing apparatus comes out, people just constantly apply up up-to-date high hardness wear-resisting material.On the Technical Development History of mechanically-sealing apparatus, this way makes to have obtained significantly to improve really the work-ing life of product.
But this method can not can obtain obvious effect in all places, while containing hard particles in medium, just very limited by improving the effect that the method for material hardness obtains.
Facts have proved, mechanically-sealing apparatus sealing life be not merely that the wear resistance of material determines, the more important thing is, all function parts in mechanically-sealing apparatus in use can not lose efficacy, and the inefficacy of functional part is only the important factor of seal failure exactly.
Summary of the invention
In order to overcome the problems that exist in above existing sealing material.Nano sealing filler of the present invention not only can efficiently solve above problem, and it is can also be on the axle head of pump class more time saving and energy saving when more perfect, the more reliable performance of operation technique, longer service life, filling, can guarantee not water clock of equipment in running.
A kind of nano sealing filler of the present invention and preparation method thereof, it has, and plasticity-, ductility, snappiness, frictional coefficient are low, corrosion-resistant, high temperature resistant, simple installation, the feature such as can be recycled.Non-maintaining between the usage period, burn into water clock not; some small dust granules also can be inhaled and be held in filler; protection axle sleeve, minimizing noise; and play the effect of energy-saving and water-saving, fully and completely solved and in numerous mechanical means, there is the run, drip, leak sealing difficult problem occurring in the axle of rotation to-and-fro movement, spiral motion or bar.
To achieve these goals, Nano filling scheme for sealing of the present invention and feature comprise: rice weighting agent in rice anti-wear agent, 1-15wt% in 20-70wt% polytetrafluoroethyldispersion dispersion resin, 5-20wt% fortifying fibre, 5-30wt% lubricant, 1-10wt% antiaging agent, 1-12wt%.
Wherein, polytetrafluoroethyldispersion dispersion resin is selected from tetrafluoroethylene dispersion emulsion.
Wherein, fortifying fibre is selected from wherein a kind of of basalt fibre, ceramic fiber, polytetrafluoroethylene fiber.
Wherein, lubricant is selected from wherein a kind of of tung oil, silicone oil, machine oil, gear oil, bearing oil, rare earth nano lubricating oil.
Wherein, antiaging agent is selected from wherein a kind of of aging resisting agent of rubber, plastic anti-aging agent.
Wherein, nano wearproof agent is selected from wherein a kind of of particulate state anti-wear agent, powder anti-wear agent, alkylboronic acids fat, alkyl borane.
Wherein, nano-filled dose is selected from dioxide peroxide powder, Graphite Powder 99, molybdenum disulphide powder, silicon dioxide powder, alchlor powder, titanium dioxide zirconium powder, Paris white, wherein one or two or more kinds of ptfe micropowder.
A kind of flexible nano lock packing of can recirculation using of preparation the present invention can be implemented in accordance with the following methods:
In polytetrafluoroethyldispersion dispersion resin, add fortifying fibre uniform stirring 5-10 minute, then after adding lubricant, antiaging agent, nano wearproof agent and nano-filled dose to mix, with stirrer, stir and to put into freeze-day with constant temperature equipment after 10-20 minute or electrothermal reaction still takes out after 2-5 hours at 110 ℃ of-230 ℃ of high bakes, can be processed into the lock packing products such as flexibility is cylindric, strip, particulate state.
Nano sealing filler of the present invention has the following advantages:
1. good sealing effect, without water clock.
2. frictional coefficient is little, and self-lubricating property is good.
3. protection axle sleeve and bearing, needn't take refitting apart, even if axle sleeve has mild wear, also can relievedly load.Granule dust in medium is had
Inhale capacitive, can reduce the destruction of granule dust to sealing material in medium.
4. reduce noise, improved machine machinery water pump environment around.Extend the work-ing life of axle sleeve.
5. good heat conduction effect, without water cooling or flushing, can avoid the meaningless loss of medium.
6. chemical stability is strong, is applicable to acid, alkali and other corrosive medium.Benzene, toluene, ether, alcohol, strong acid, highly basic etc. are molten to polarity
Agent has the medium of solvency action.
7. work-ing life, the cycle was long, can be recycled.
8. fitting operation is easy, need not carry out complicated training to installation personnel, loads by hand or all can with the online filling of injection filler rifle.
9. stock is single, only needs to prepare a kind of nano sealing filler product and just can meet the needs of various model pumps.
10. during product is installed, used from producing to, all there is not contamination phenomenon, belong to typical energy saving environmental protection product.
11. overall economic efficiencies are high, can energy-saving and water-saving.
12. can be placed on used waste and old filler in machine oil, soak 7-10 days (breaking loose), after softness, can reuse.
Nano filling of the present invention and the comparison of conventional seals product comprehensive benefit
(1) 50 to 100 yuan of packings (1kg)
One Daepori water flowing pump is loaded packing 4 circles approximately (1kg), once can use 60 days, and within 1 year, needs are changed 6 times, and cost in a year is 50 to 100 yuan of (1kg) * 6 time=300 to 600 yuan, within 1 year, changes an axle sleeve, and cost is more than 100 yuan.
During this, do not include workman's difficulty when changing packing large, spended time is long, within 1 year, leaks, the cost of gas, and during motor rotation, noise sound is large, the expense that power consumption is high.
(2) 3000 yuan of 200 yuan/kg of muddy packing filler filling guns/
One Daepori water flowing pump is loaded muddy packing 500g, once can use about 90 days, and within 1 year, needs are loaded 4 times, and cost in a year is 100 yuan * 4 times=400 yuan.Do not have filling gun cannot use this product.
(3) mechanical seal is 200 to 6000 yuan
One Daepori water flowing pump is installed the general use of mechanical seal 6 months, and transformation is changed once needs to spend 200 to 6000 yuan (cover).2 costs of transformation in a year are 200 to 6000 yuan of (cover) * 2 time=400 to 12000 yuan.
Because the uncertainty of fluctuation and equipment failure causes seal leakage, but maintenance cost is very high, and wants to change all a whole set of consumable accessorys when maintenance, and its appropriate litigation fees is expensive.
(4) nano sealing filler
One Daepori water flowing pump, during with packing 4 circle approximately (1kg), is loaded 100 grams of Nano fillings, spends altogether 380 yuan, just all difficult problem solutions can be can be recycled, non-maintaining between the usage period, burn into water clock not.
Because this material can recycle, throughout the year without replacing, only need add on a small quantity later, used waste and old filler can be placed in machine oil.Soak 7-10 days (breaking loose), after softness, can reuse.
Flexible nano lock packing of the present invention is used can reach beneficial effect:
It is more perfect in technology, more reliable in performance, more time saving and energy saving while loading, can guarantee equipment water clock not in the running.Fully and completely solved and in numerous mechanical means, there is the run, drip, leak sealing difficult problem occurring in the axle of rotation to-and-fro movement, spiral motion or bar.
Not only from sealing mechanism and product material, done major tuneup, and realized the important breakthrough on product structure, both improved product work-ing life, the service efficiency ，You Wei enterprise of also having improved mechanical means has saved production cost.
Embodiment
Below in conjunction with embodiment, the present invention is described, material therefor counts by weight percentage:
Embodiment 1
In 40 weight part ptfe emulsions, add 18 weight part basalt fibres to stir 5-10 minute, then, after adding 10 weight part tung oil, 7 parts by weight of rubber antiaging agents, 9 weight part particulate state anti-wear agents, 16 weight part nanometer titanium dioxide chlorine powder to mix, with stirrer, stir and to put into freeze-day with constant temperature equipment after 10-20 minute or electrothermal reaction still takes out after 2-5 hours at 110 ℃ of-150 ℃ of high bakes, can be processed into the lock packing products such as flexibility is cylindric, strip, particulate state.
Embodiment 2
In 45 weight part tetrafluoroethylene Ruzhongs, add 15 weight part ceramic fibers to stir 5-10 minute, then, after adding 13 weight part silicone oil, 5 weight part plastic anti-aging agents, 12 weight part powder anti-wear agents, 10 weight part Nano graphite powders to mix, with stirrer, stir and to put into freeze-day with constant temperature equipment after 10-20 minute or electrothermal reaction still takes out after 2-5 hours at 120 ℃ of-170 ℃ of high bakes, can be processed into the lock packing products such as flexibility is cylindric, strip, particulate state.
Embodiment 3
In 42 weight part ptfe emulsions, add 20 weight part machine oil, 11 weight part polytetrafluoroethylene fibers to stir 5-10 minutes, then, after adding 9 parts by weight of rubber antiaging agents, 6 weight part alkylboronic acids fat anti-wear agents, 12 weight part nanometer curing order powder to mix, with stirrer, stir and to put into freeze-day with constant temperature equipment after 10-20 minute or electrothermal reaction still takes out after 2-5 hours at 130 ℃ of-180 ℃ of high bakes, can be processed into the lock packing products such as flexibility is cylindric, strip, particulate state.
Embodiment 4
At 40 weight part ptfe emulsions, add 9 weight part basalt fibres, 15 weight part gear oils to stir 5-10 minutes, then after adding 5 weight part phthalic acid fat, 8 parts by weight of rubber antiaging agents, 9 weight part alkyl borane anti-wear agents, 14 weight part nano-silica powders to mix, with stirrer, stir and to put into freeze-day with constant temperature equipment after 10-20 minute or electrothermal reaction still takes out after 2-5 hours at 140 ℃ of-190 ℃ of high bakes, can be processed into the lock packing products such as flexibility is cylindric, strip, particulate state.
Embodiment 5
In 45 weight part ptfe emulsions, add 13 weight part basalt fibres to stir 5-10 minute, after adding 16 weight part gear oils, 6 weight part phthalic acid fat, 7 parts by weight of rubber antiaging agents, 3 weight part particulate state anti-wear agents, 10 weight part nanometer alchlor powder to mix, with stirrer stirring, after 10-20 minute, put into freeze-day with constant temperature equipment or the taking-up after 150 ℃ of-200 ℃ of high bake 2-5 hours of electrothermal reaction still, can be processed into the lock packing products such as flexibility is cylindric, strip, particulate state.
Embodiment 6
In 40 weight part ptfe emulsions, add 14 weight part ceramic fibers to stir 5-10 minutes, after adding 18 weight part bearing oils, 4 weight part phthalic acid polyesters, 5 weight part plastic anti-aging agents, 9 weight part powder anti-wear agents, 10 weight part nanometer titanium dioxide zirconium powders to mix, with stirrer, stir and to put into freeze-day with constant temperature equipment after 10-20 minute or electrothermal reaction still takes out after 2-5 hours at 160 ℃ of-210 ℃ of high bakes, can be processed into the lock packing products such as flexibility is cylindric, strip, particulate state.
Embodiment 7
In 42 weight part ptfe emulsions, add 14 weight part polytetrafluoroethylene fibers to stir 5-10 minute, after adding 16 weight part rare earth nano lubricating oils, 4 weight part Epoxy oil fourth fat, 4 parts by weight of rubber antiaging agents, 6 weight part alkylboronic acids fat anti-wear agents, 14 weight part nano-calcium carbonate calcium powders to mix, with stirrer, stir and to put into freeze-day with constant temperature equipment after 10-20 minute or electrothermal reaction still takes out after 2-5 hours at 170 ℃ of-220 ℃ of high bakes, can be processed into the lock packing products such as flexibility is cylindric, strip, particulate state.
Embodiment 8
In 45 weight part ptfe emulsions, add 13 weight part polytetrafluoroethylene fibers to stir 5-10 minutes, after adding 17 weight part bearing oils, 5 weight part Epoxy oil fourth fat, 6 parts by weight of rubber antiaging agents, 3 weight part alkylboronic acids fat anti-wear agents, 11 weight part nano-calcium carbonate calcium powders to mix, with stirrer, stir and to put into freeze-day with constant temperature equipment after 10-20 minute or electrothermal reaction still takes out after 2-5 hours at 180 ℃ of-230 ℃ of high bakes, can be processed into the lock packing products such as flexibility is cylindric, strip, particulate state.
The flexible nano lock packing of being processed into according to the preparation method described in embodiment 1-8, in Guangxi Gold city river hydraulic power plant water pump, test, temperature: 80 degree, medium: water, pressure: 1.5 MPas, in June, 2012, load, solve long-term occur perishable, water clock, axle sleeve serious wear, electricity damage high, that maintenance is changed is difficult, the difficult problem such as take a lot of work consuming time, has improved production efficiency greatly, this product in September, 2013 still in use.
Test temperature in Liaohe Oil Field oil-extractor polish-rod sealing sealer: 70 degree, medium: liquid, pressure: 1.2 MPas, in August, 2012, with filler rifle injection, be filled into and in polished rod sealer, greatly improved production efficiency online so far, reduced maintenance time and cost, this product in September, 2013 still in use.
In Gongyi good luck mechanical means Manufacturing Co., Ltd twin shaft humidification step-down gear, test, temperature: 110 degree, medium: powder, pressure: 1.0 MPas, in December, 2012, load, solve occur that perishable, water clock, power consumption are high for a long time, axle sleeve serious wear, that maintenance is changed is difficult, the difficult problem such as take a lot of work consuming time, greatly improved production efficiency, this product in September, 2013 still in use.
More than experimental results show that a kind of flexible nano lock packing of can recirculation using of my invention, it is more perfect in technology, more reliable in performance, longer service life, can guarantee equipment water clock not in the running, has fully and completely solved and in numerous mechanical means, has had the run, drip, leak sealing difficult problem occurring in the axle of rotation to-and-fro movement, spiral motion or bar.
Not only from sealing mechanism and product material, done major tuneup, and realized the important breakthrough on product structure, both improved product work-ing life, the service efficiency ，You Wei enterprise of also having improved mechanical means has saved production cost.
Claims (8)
1. a flexible nano lock packing of can recirculation using, is characterized in that it comprises: in 20-70wt% polytetrafluoroethyldispersion dispersion resin, 5-20wt% fortifying fibre, 5-30wt% lubricant, 1-10wt% antiaging agent, 1-12wt%, rice anti-wear agent, 1-15wt% are nano-filled dose.
2. a kind of flexible nano lock packing of can recirculation using according to claim 1, wherein, polytetrafluoroethyldispersion dispersion resin is selected from tetrafluoroethylene dispersion emulsion.
3. a kind of flexible nano lock packing of can recirculation using according to claim 1, wherein, fortifying fibre is selected from wherein a kind of of basalt fibre, ceramic fiber, polytetrafluoroethylene fiber.
4. a kind of flexible nano lock packing of can recirculation using according to claim 1, wherein, lubricant is selected from wherein a kind of of tung oil, silicone oil, machine oil, gear oil, bearing oil, rare earth nano lubricating oil.
5. a kind of flexible nano lock packing of can recirculation using according to claim 1, wherein, antiaging agent is selected from wherein a kind of of aging resisting agent of rubber, plastic anti-aging agent.
6. a kind of flexible nano lock packing of can recirculation using according to claim 1, wherein, nano wearproof agent is selected from wherein a kind of of particulate state anti-wear agent, powder anti-wear agent, alkylboronic acids fat anti-wear agent, alkyl borane anti-wear agent.
7. a kind of flexible nano lock packing of can recirculation using according to claim 1, wherein, nano-filled dose is selected from dioxide peroxide powder, Graphite Powder 99, molybdenum disulphide powder, silicon dioxide powder, alchlor powder, titanium dioxide zirconium powder, Paris white, wherein one or two or more kinds of ptfe micropowder.
8. a kind of flexible nano lock packing preparation method who can recirculation uses according to claim 1, comprises following component:
In polytetrafluoroethyldispersion dispersion resin, add fortifying fibre uniform stirring 5-10 minute, then after adding lubricant, antiaging agent, nano wearproof agent and nano-filled dose to mix, with stirrer, stir and to put into freeze-day with constant temperature equipment after 10-20 minutes or electrothermal reaction still takes out after 2-5 hours at 110 ℃ of-230 ℃ of high bakes, can be processed into the lock packing products such as flexibility is cylindric, strip, particulate state.
It is more perfect in technology, more time saving and energy saving when more reliable in performance, longer service life, filling, can guarantee equipment water clock not in the running, fully and completely solved and in numerous mechanical means, there is the run, drip, leak sealing difficult problem occurring in the axle of rotation to-and-fro movement, spiral motion or bar.
Not only from sealing mechanism and product material, done major tuneup, and realized the important breakthrough on product structure, both improved product work-ing life, the service efficiency ，You Wei enterprise of also having improved mechanical means has saved production cost.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310444427.6A CN103602311A (en) | 2013-09-27 | 2013-09-27 | Recyclable flexible nanometer sealing filler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310444427.6A CN103602311A (en) | 2013-09-27 | 2013-09-27 | Recyclable flexible nanometer sealing filler |
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| CN103602311A true CN103602311A (en) | 2014-02-26 |
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| CN201310444427.6A Pending CN103602311A (en) | 2013-09-27 | 2013-09-27 | Recyclable flexible nanometer sealing filler |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104212562A (en) * | 2014-07-30 | 2014-12-17 | 苏州通力电气有限公司 | High-temperature-resistant self-lubricating soft filling material and preparation method thereof |
| CN104231494A (en) * | 2014-07-30 | 2014-12-24 | 苏州通力电气有限公司 | Auxiliary sealing component material for mechanical seal |
| CN104592694A (en) * | 2015-01-04 | 2015-05-06 | 和县科嘉阀门铸造有限公司 | Nano calcium carbonate modified polytetrafluoroethylene composite material for sealing valve |
| CN105318006A (en) * | 2014-07-30 | 2016-02-10 | 苏州通力电气有限公司 | High-temperature-resistant and self-lubricating soft packing |
| CN105860380A (en) * | 2016-04-07 | 2016-08-17 | 马士民 | Flexible granular dynamic sealing filler |
| CN106246128A (en) * | 2016-07-28 | 2016-12-21 | 尹国庆 | Pumping unit well mouth polish rod seals pouring-in filler |
| CN107325564A (en) * | 2017-06-03 | 2017-11-07 | 安徽绿环泵业有限公司 | One kind is without asbestos chemical pump airtight and watertight padding |
| CN107474449A (en) * | 2017-07-06 | 2017-12-15 | 无为华兴高分子材料有限公司 | A kind of cheap fluoroplastics of cost |
| CN109181113A (en) * | 2018-10-09 | 2019-01-11 | 合肥凯大新型材料科技有限公司 | A kind of filler improving rubber stability |
| CN110206823A (en) * | 2019-06-01 | 2019-09-06 | 大连理工大学 | Hot spraying resin-based composite material water-lubricated bearing and manufacturing method thereof |
| CN112111118A (en) * | 2020-09-28 | 2020-12-22 | 深圳市德诚旺科技有限公司 | Flexible polytetrafluoroethylene product and preparation process thereof |
| CN113429659A (en) * | 2021-07-12 | 2021-09-24 | 安徽瑞丰管业有限公司 | Production process of high-wear-resistance glass steel tube |
| CN113620611A (en) * | 2021-08-30 | 2021-11-09 | 安徽晶驰光电科技有限公司 | Preparation method of high borosilicate glass anti-glare |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104212562A (en) * | 2014-07-30 | 2014-12-17 | 苏州通力电气有限公司 | High-temperature-resistant self-lubricating soft filling material and preparation method thereof |
| CN104231494A (en) * | 2014-07-30 | 2014-12-24 | 苏州通力电气有限公司 | Auxiliary sealing component material for mechanical seal |
| CN105318006A (en) * | 2014-07-30 | 2016-02-10 | 苏州通力电气有限公司 | High-temperature-resistant and self-lubricating soft packing |
| CN104592694A (en) * | 2015-01-04 | 2015-05-06 | 和县科嘉阀门铸造有限公司 | Nano calcium carbonate modified polytetrafluoroethylene composite material for sealing valve |
| CN105860380A (en) * | 2016-04-07 | 2016-08-17 | 马士民 | Flexible granular dynamic sealing filler |
| CN106246128A (en) * | 2016-07-28 | 2016-12-21 | 尹国庆 | Pumping unit well mouth polish rod seals pouring-in filler |
| CN107325564A (en) * | 2017-06-03 | 2017-11-07 | 安徽绿环泵业有限公司 | One kind is without asbestos chemical pump airtight and watertight padding |
| CN107474449A (en) * | 2017-07-06 | 2017-12-15 | 无为华兴高分子材料有限公司 | A kind of cheap fluoroplastics of cost |
| CN109181113A (en) * | 2018-10-09 | 2019-01-11 | 合肥凯大新型材料科技有限公司 | A kind of filler improving rubber stability |
| CN110206823A (en) * | 2019-06-01 | 2019-09-06 | 大连理工大学 | Hot spraying resin-based composite material water-lubricated bearing and manufacturing method thereof |
| CN112111118A (en) * | 2020-09-28 | 2020-12-22 | 深圳市德诚旺科技有限公司 | Flexible polytetrafluoroethylene product and preparation process thereof |
| CN113429659A (en) * | 2021-07-12 | 2021-09-24 | 安徽瑞丰管业有限公司 | Production process of high-wear-resistance glass steel tube |
| CN113620611A (en) * | 2021-08-30 | 2021-11-09 | 安徽晶驰光电科技有限公司 | Preparation method of high borosilicate glass anti-glare |
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Application publication date: 20140226 |