CN108526196A - A kind of method of quick stripping waste liquor crystal display polaroid - Google Patents
A kind of method of quick stripping waste liquor crystal display polaroid Download PDFInfo
- Publication number
- CN108526196A CN108526196A CN201810253521.6A CN201810253521A CN108526196A CN 108526196 A CN108526196 A CN 108526196A CN 201810253521 A CN201810253521 A CN 201810253521A CN 108526196 A CN108526196 A CN 108526196A
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- Prior art keywords
- crystal display
- polaroid
- acetone
- liquid crystal
- glass panel
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000002699 waste material Substances 0.000 title claims abstract description 34
- 239000013078 crystal Substances 0.000 title claims abstract description 19
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 106
- 239000011521 glass Substances 0.000 claims abstract description 53
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 41
- 239000012528 membrane Substances 0.000 claims abstract description 24
- 229920002678 cellulose Polymers 0.000 claims abstract description 23
- 239000001913 cellulose Substances 0.000 claims abstract description 23
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000004064 recycling Methods 0.000 claims abstract description 13
- 229920003023 plastic Polymers 0.000 claims abstract description 7
- 239000004033 plastic Substances 0.000 claims abstract description 7
- 238000013019 agitation Methods 0.000 claims abstract description 5
- 238000005119 centrifugation Methods 0.000 claims abstract description 5
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000007605 air drying Methods 0.000 claims description 5
- 229920006304 triacetate fiber Polymers 0.000 claims description 2
- 239000000758 substrate Substances 0.000 abstract description 19
- 238000011084 recovery Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000007062 hydrolysis Effects 0.000 abstract description 2
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract description 2
- 238000000197 pyrolysis Methods 0.000 abstract description 2
- 231100000331 toxic Toxicity 0.000 abstract description 2
- 230000002588 toxic effect Effects 0.000 abstract description 2
- 229920002799 BoPET Polymers 0.000 description 5
- 238000007654 immersion Methods 0.000 description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 150000002085 enols Chemical class 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000005355 lead glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Liquid Crystal (AREA)
Abstract
The invention belongs to waste liquid crystal display technical field of resource recovery, and in particular to a kind of method of quick stripping waste liquor crystal display polaroid.This method is first by the glass panel hot-water soak in liquid crystal display, it is tentatively removed after taking-up, is only stained with the glass panel of one layer of triacetate cellulose membrane, then carry out acetone soak again, pressure sensitive glueyness is set to drastically reduce, to remove remaining triacetate cellulose membrane.This method can completely detach complete or different damaged degree waste liquid crystal display each section, processing time is as short as 1h, wherein the acetone soak time is less than 30min, acetone dosage can be reduced, it is environmentally protective, and the mode that mechanical agitation or centrifugation can be used after acetone soak detaches film with glass substrate, avoids toxic side effect of the acetone to human body.The stripping of polaroid and the recycling of liquid crystal can be achieved at the same time using an acetone soak in this method, and the polaroid of stripping can be used as plastics pyrolysis or hydrolysis etc. and be recycled not by high temperature.
Description
Technical field
The invention belongs to waste liquid crystal display technical field of resource recovery, and in particular to a kind of quick stripping waste liquor crystalline substance is shown
The method of device polaroid.
Background technology
Liquid crystal display wraps up Formation of liquid crystals by two pieces of ito glass substrates for posting polaroid, is widely used in mobile phone, pen
The image of note sheet, tablet and TV is shown, but the liquid crystal display caused by it failures such as screen leakage or broken screen easily occurs
Learies are much larger than the learies of these electronic product complete machines, therefore the research and development of its resource utilization technology seem particularly critical.
There are larger differences for the structure of matter of polaroid, ito glass substrate and liquid crystal three, and the maximization of benefit is recycled for realization, is had
Necessity is isolated.In disassembly process, liquid crystal easily detaches dissolution, however polaroid and ito glass substrate are firmly bonded, if
The difficulty that will increase crushing and screening in ito glass removal process cannot be efficiently separated, while can also reduce the rate of recovery of polaroid.
Polaroid can be pyrolyzed production combustible oil gas and hydro-thermal production acid, further high-valued recycle technology are also being ground
In hair, and ito glass substrate can be used not only for dissipated metal extraction indium, also can as building materials or the raw material of glassware, because
This, both of waste liquid crystal display is efficiently separated be resource utilization pre-processing committed step.Liquid crystal display
Polaroid generally presss from both sides layer of polyethylene alcohol film by two layers of three cellulose acetate membrane and constitutes, and PET protection film is also posted outside polaroid,
By pressure sensitive adhesive fitting on glass panels, if thus want realize polaroid detached with the lossless of glass substrate, it is necessary to reduce
The bonding force of pressure sensitive adhesive.
Currently, the isolation technics research both at home and abroad about polaroid in waste liquid crystal display and ito glass substrate is less, lead to
It is often based on single resource reclaim to research and develop, is difficult to retain the two primary characteristic in separation process.Chinese patent CN 104793369
A discloses a kind of equipment of separation polaroid and glass substrate, is based primarily upon the separation of material physical characteristic, but due to pressure sensitive adhesive hardly possible
To reduce viscosity under this condition, therefore separation rate can be caused too low, while carrying out Mechanical Crushing in water body to cause glass
The loss of indium resource on substrate.103331295 A of Chinese patent CN disclose a kind of glass panel production of waste liquid crystal display
Industry recovery method and device are mainly recycled by physics exploitation, organic solvent immersion and the step of centrifugation, process cycle
It is long, and it is difficult to the liquid crystal display for being suitable for being crushed.Chinese patent CN 101690936 discloses a kind of useless film crystal
Glass substrate is directly warming up to 190~250 DEG C by pipe resource sharing treatment method of liquid crystal display, this method, by polaroid embrittlement
After fill, do not consider its resource utilization issue, although and high-temperature process pressure sensitive adhesive can be made to lose viscosity, facilitate the stripping of polaroid
From, but simultaneously because polaroid is destroyed, therefore lose utility value.(Nie's ear, Luo Xingzhang, Zheng Zheng, the great reputation such as Nie's ear.
Environmental project journal, 2008,2 (9):1251-1254) people's play-by-play effect of the acetone in polaroid stripping process, on
Polaroid immersion 4h is peelable, and down polaroid needs a couple of days.Chinese patent CN102002592 discloses a kind of waste and old liquid crystal
The process of display screen processing, this method equally remove polaroid using acetone soak 4h.However acetone has strong volatility,
Therefore above-mentioned existing research is impregnated in long-time, and acetone dosage is big, and charge stripping efficiency is low.In addition, the studies above be both needed into
The first acetone soak of row removes polaroid, then carries out acetone soak again and collects liquid crystal, step is complicated, and for there is leakage
The waste and old liquid crystal display of liquid, again the step redundancy of acetone soak.
Invention content
The shortcomings that overcome the prior art and deficiency, it is aobvious that primary and foremost purpose of the invention is to provide a kind of quick stripping waste liquor crystalline substance
Show the method for device polaroid.This method is come using first hot-water soak, then the method for acetone soak in stripping waste liquor crystal display
Polaroid, the acetone soak time is short, and stripping difficulty is low, can realize that polaroid is synchronous with liquid crystal by an acetone soak and return
It receives, obtains each component of lossless waste liquid crystal display.
To achieve the above object, the technical solution adopted by the present invention is as follows:
A kind of method of quick stripping waste liquor crystal display polaroid, includes the following steps:
(1) various components in stripping waste liquor crystal display, respectively obtain backlight module, liquid crystal display, plastic frame and gold
Belong to frame;
(2) two pieces of glass panels up and down of liquid crystal display are detached;
(3) it with glass panel in hot-water soak and lower glass panel, is taken out after finding polaroid color from depth to shallow, so
The polaroid on the glass panel after lighter is removed afterwards, is only stained with the glass surface of one layer of triacetate cellulose membrane
The polarizer portion of plate, stripping restores to the original state after the natural air drying of surface;
(4) it is only stained with the upper glass panel of one layer of triacetate cellulose membrane and lower glass panel with acetone soak, waits for pressure sensitive adhesive
Triacetate cellulose membrane is removed after losing viscosity, is restored to the original state after the acetone volatilization of triacetate fiber film surface.
Preferably, step (3) described hot water temperature is 80~100 DEG C.
Preferably, a length of 5~20min when step (3) described hot-water soak.
For the glass panel taken out after hot-water soak, if stored in the environment for a long time it is untreated, lead to glass surface
Plate surface is cooling and color recovery, then needs to repeat step (3).
The polarizer portion removed described in step (3) includes PET film, triacetate cellulose membrane and polyvinyl alcohol film.
Preferably, a length of 15~30min when acetone soak described in step (4).
It is furthermore preferred that on acetone soak described in step (4) glass panel when a length of 15min, impregnate lower glass panel
When a length of 30min.
Preferably, triacetate cellulose membrane is removed described in step (4) using the glass panel after taking out acetone soak, then into
The mode that row is removed by hand.
For the glass panel taken out after acetone soak, if stored in the environment for a long time it is untreated, lead to glass surface
Plate surface acetone volatilizees completely, then needs to repeat step (4).
Preferably, described in step (4) remove triacetate cellulose membrane using directly in acetone carry out mechanical agitation or from
The mode of the heart.
Preferably, after step (4), the residual solution obtained after acetone soak is distilled, acetone and liquid are isolated
Crystalline substance, recycling utilize once again.
Compared with prior art, the present invention having the following advantages that and advantageous effect:
(1) present invention by two parts from method, can be by the polarisation in complete or different damaged degree waste liquid crystal display
Piece completely detaches, and removes PET film, triacetate cellulose membrane and poly- second in glass substrate surface polaroid by hot-water soak first
The combination film layer of enol film excludes combination film layer and hinders the infiltration of acetone, then passes through acetone soak, you can make pressure-sensitive adhesive
Property significantly reduce, to remove the triacetate cellulose membrane of remaining polaroid.This method is simple, low for equipment requirements, total to handle
Time is less than 1h, and the wherein acetone soak time is less than 30min, can reduce the dosage of acetone, environmentally protective, improves stripping rate.
(2) stripping of polaroid and the recycling of liquid crystal can be achieved at the same time by an acetone soak in the present invention, does not need two
Secondary acetone soak.
(3) method of present invention stripping liquid crystal display polaroid is not necessarily to high-temperature process, therefore polaroid will not be by broken
Bad, polaroid each section obtained by stripping can be used as plastics pyrolysis or hydrolysis etc. and be recycled.
(4) glass substrate in the present invention, can be by way of mechanical agitation or centrifugation by three acetic acid after acetone soak
Tunica fibrosa is separated with glass substrate, without human intervention, avoids toxic side effect of the acetone to human body.
Description of the drawings
Fig. 1 is the process flow chart of the method for the quick stripping waste liquor crystal display polaroid.
Specific implementation mode
With reference to embodiment and attached drawing, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.For not specifically specified technological parameter, routine techniques progress can refer to.
The technological process of stripping waste liquor crystal display polaroid is as shown in Figure 1 in the embodiment of this part.
Embodiment 1
The present embodiment provides a kind of methods of quick stripping waste liquor crystal display polaroid:
1, it is pried open along waste liquid crystal display metal edge frame commissure with flat mouth screwdriver, takes out backlight module recycling, wherein
Intact film can utilize once again, liquid crystal display, plastic frame, metal edge frame classification recycling.
2, it is scratched along liquid crystal display edge with pocket knife, detaches two pieces of glass panels up and down.
3, it with 80 DEG C of water immersion glass panel 20min, is taken out after finding polaroid color from depth to shallow, removes polaroid
The polaroid film layer of middle PET film, triacetate cellulose membrane and polyvinyl alcohol film composition.Released part is restored after the natural air drying of surface
Original state.
4, the top glass substrate 15min and lower glass substrate of triacetate cellulose membrane are only stained with acetone submergence
30min makes pressure sensitive adhesive lose viscosity, takes out the glass panel after impregnating, and removes triacetate cellulose membrane, stripping by hand
Part restores to the original state after the volatilization of surface acetone.
5, the residual solution obtained after acetone soak is distilled, isolates acetone and liquid crystal, recycling utilizes once again.
Embodiment 2
The present embodiment provides a kind of methods of quick stripping waste liquor crystal display polaroid:
1, it is pried open along waste liquid crystal display metal edge frame commissure with flat mouth screwdriver, takes out backlight module recycling, wherein
Intact film can utilize once again, liquid crystal display, plastic frame, metal edge frame classification recycling.
2, it is scratched along liquid crystal display edge with pocket knife, detaches two pieces of glass panels up and down.
3, it with 100 DEG C of water immersion glass panel 5min, is taken out after finding polaroid color from depth to shallow, removes polaroid
The combination film layer of middle PET film, triacetate cellulose membrane and polyvinyl alcohol film.Released part restores to the original state after the natural air drying of surface.
4, it is only stained with the top glass substrate 15min and lower glass substrate 30min of triacetate cellulose membrane with acetone submergence, makes pressure
Quick glue loses viscosity, removes triacetate cellulose membrane by mechanical agitation, released part restores to the original state after the volatilization of surface acetone.
5, the residual solution obtained after acetone soak is distilled, isolates acetone and liquid crystal, recycling utilizes once again.
Embodiment 3
The present embodiment provides a kind of methods of quick stripping waste liquor crystal display polaroid:
1, it is pried open along waste liquid crystal display metal edge frame commissure with flat mouth screwdriver, takes out backlight module recycling, wherein
Intact film can utilize once again, liquid crystal display, plastic frame, metal edge frame classification recycling.
2, it is scratched along liquid crystal display edge with pocket knife, detaches two pieces of glass panels up and down.
3, it with 90 DEG C of water immersion glass panel 10min, is taken out after finding polaroid color from depth to shallow, removes polaroid
The combination film layer of middle PET film, triacetate cellulose membrane and polyvinyl alcohol film.Released part restores to the original state after the natural air drying of surface.
4, it is only stained with the top glass substrate and lower glass substrate 30min of triacetate cellulose membrane with acetone submergence, makes pressure sensitive adhesive
Viscosity is lost, triacetate cellulose membrane is removed by centrifugation, released part restores to the original state after the volatilization of surface acetone.
5, the residual solution obtained after acetone soak is distilled, isolates acetone and liquid crystal, recycling utilizes once again.
Above-described embodiment is preferrred embodiment of the present invention, but embodiments of the present invention are not limited to above-mentioned implementation
Example, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications,
Equivalent substitute mode is answered, is included within the scope of the present invention.
Claims (7)
1. a kind of method of quick stripping waste liquor crystal display polaroid, which is characterized in that include the following steps:
(1) various components in stripping waste liquor crystal display, respectively obtain backlight module, liquid crystal display, plastic frame and metal edges
Frame;
(2) two pieces of glass panels up and down of liquid crystal display are detached;
(3) it with glass panel in hot-water soak and lower glass panel, is taken out after finding polaroid color from depth to shallow, it is then right
The polaroid on glass panel after lighter is removed, and the glass panel of one layer of triacetate cellulose membrane is only stained with,
The polarizer portion of stripping restores to the original state after the natural air drying of surface;
(4) it is only stained with the upper glass panel of one layer of triacetate cellulose membrane and lower glass panel with acetone soak, waits for that pressure sensitive adhesive loses
Triacetate cellulose membrane is removed after viscosity, is restored to the original state after the acetone volatilization of triacetate fiber film surface.
2. the method for quick stripping waste liquor crystal display polaroid according to claim 1, it is characterised in that:Step (3) institute
It is 80~100 DEG C to state hot water temperature.
3. the method for quick stripping waste liquor crystal display polaroid according to claim 1, it is characterised in that:Step (3) institute
State a length of 5~20min when hot-water soak.
4. the method for quick stripping waste liquor crystal display polaroid according to claim 1, it is characterised in that:In step (4)
A length of 15~30min when the acetone soak.
5. the method for quick stripping waste liquor crystal display polaroid according to claim 4, it is characterised in that:In step (4)
The when a length of 15min of glass panel on the acetone soak impregnates the when a length of 30min of lower glass panel.
6. the method for quick stripping waste liquor crystal display polaroid according to claim 1, it is characterised in that:In step (4)
The stripping triacetate cellulose membrane by the way of directly carrying out mechanical agitation or centrifugation in acetone.
7. according to the method for any one of the claim 1~6 quick stripping waste liquor crystal display polaroid, it is characterised in that:
After step (4), the residual solution obtained after acetone soak is distilled, isolates acetone and liquid crystal, recycling utilizes once again.
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CN201810253521.6A CN108526196B (en) | 2018-03-26 | 2018-03-26 | Method for quickly stripping polaroid of waste liquid crystal display |
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CN201810253521.6A CN108526196B (en) | 2018-03-26 | 2018-03-26 | Method for quickly stripping polaroid of waste liquid crystal display |
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CN108526196A true CN108526196A (en) | 2018-09-14 |
CN108526196B CN108526196B (en) | 2020-04-28 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111862834A (en) * | 2020-06-22 | 2020-10-30 | 长春希达电子技术有限公司 | Surface film pasting process-based LED full-color display product film and glue separation method |
CN115070997A (en) * | 2022-06-13 | 2022-09-20 | 宁波江丰复合材料科技有限公司 | Separation method of BS (base station) base and product for CFRP (carbon fiber reinforced plastics) industry |
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WO2016110825A1 (en) * | 2015-01-08 | 2016-07-14 | OMIZZOLO, Giacomo | Method and apparatus for the disposal of photovoltaic panels |
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CN102002591A (en) * | 2010-09-28 | 2011-04-06 | 苏州群瑞环保科技有限公司 | Process for extracting indium from waste liquid crystal display screen |
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