CN214688346U - EVA intermediate film for building glass - Google Patents
EVA intermediate film for building glass Download PDFInfo
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- CN214688346U CN214688346U CN202120870009.3U CN202120870009U CN214688346U CN 214688346 U CN214688346 U CN 214688346U CN 202120870009 U CN202120870009 U CN 202120870009U CN 214688346 U CN214688346 U CN 214688346U
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- Prior art keywords
- eva resin
- eva
- sleeve
- resin layer
- layer
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- 239000011521 glass Substances 0.000 title claims abstract description 29
- 229920005989 resin Polymers 0.000 claims abstract description 104
- 239000011347 resin Substances 0.000 claims abstract description 104
- 238000007789 sealing Methods 0.000 claims abstract description 33
- 239000003292 glue Substances 0.000 claims abstract description 29
- 230000008018 melting Effects 0.000 claims abstract description 25
- 238000002844 melting Methods 0.000 claims abstract description 25
- 238000007711 solidification Methods 0.000 claims abstract description 22
- 230000008023 solidification Effects 0.000 claims abstract description 22
- 239000010410 layer Substances 0.000 claims description 111
- 230000003014 reinforcing effect Effects 0.000 claims description 25
- 229920000742 Cotton Polymers 0.000 claims description 16
- 238000010521 absorption reaction Methods 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000011229 interlayer Substances 0.000 claims 8
- 239000007788 liquid Substances 0.000 abstract description 32
- 239000005340 laminated glass Substances 0.000 abstract description 9
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 109
- 239000005038 ethylene vinyl acetate Substances 0.000 description 109
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 109
- 239000012790 adhesive layer Substances 0.000 description 12
- 239000012528 membrane Substances 0.000 description 12
- 238000009413 insulation Methods 0.000 description 10
- 230000035939 shock Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000155 melt Substances 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 239000003351 stiffener Substances 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- 239000002313 adhesive film Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- DYAHQFWOVKZOOW-UHFFFAOYSA-N Sarin Chemical compound CC(C)OP(C)(F)=O DYAHQFWOVKZOOW-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000004964 aerogel Substances 0.000 description 1
- 239000005328 architectural glass Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Joining Of Glass To Other Materials (AREA)
Abstract
The utility model relates to a laminated glass technical field discloses a EVA intermediate film for building glass, it includes the EVA resin layer, bury underground in the intraformational enhancement glue film of EVA resin and be used for the fixed establishment on fixed EVA resin layer, fixed establishment includes a plurality of solidification sleeves of wearing to establish the enhancement glue film, solidification sleeve both ends all carry out the terminal through the wax sealing, the melting point on enhancement glue film is higher than the melting point on EVA resin layer, the melting point on wax sealing is less than the melting point on EVA resin layer. The liquid EVA resin generated after the EVA resin layer is melted is absorbed, so that the possibility that the liquid EVA resin overflows from the space between the glass plates of the laminated glass is reduced.
Description
Technical Field
The application relates to the field of sandwich glass technology, in particular to an EVA (ethylene vinyl acetate) intermediate film for building glass.
Background
At present, laminated glass is widely used in the building industry, when the laminated glass is produced, adhesive films are generally used for connecting a plurality of glass plates, an EVA resin layer is a novel adhesive film and has the advantages of easy processing and quick forming, and the processing is generally carried out under the conditions of 110 plus one material at 130 ℃ and 0.1 Mpa.
Chinese patent with publication number CN211999556U discloses a high printing opacity heat-insulating type EVA intermediate film for building engineering, including the EVA glued membrane of two-layer relative setting, locate the shock insulation membrane between two-layer EVA glued membrane and set up in the heat insulation membrane of shock insulation membrane both sides, the mounting groove has all been seted up to the relative one side of two-layer EVA glued membrane, two heat insulation membranes are located the mounting inslot respectively, the heat insulation membrane is the transparent heat insulation membrane of aerogel or PET polyester film, the shock insulation membrane is silica gel shock insulation layer, the shock insulation membrane both sides bond with two EVA glued membrane one side in opposite directions respectively. The EVA intermediate film formed by composite processing has the effects of heat insulation and light transmission.
In view of the above-mentioned related technologies, the inventor believes that the melting point range of the EVA film is only 60-80 ℃, and during the processing, the EVA film is heated and melted, which causes part of the EVA resin to overflow from between the glass plates, and is liable to affect the product quality.
SUMMERY OF THE UTILITY MODEL
The EVA film is heated and melted in the processing process, the product quality is easily influenced, and in order to improve the defect, the application provides the EVA intermediate film for the building glass.
The application provides a pair of EVA intermediate film for building glass adopts following technical scheme to obtain:
the utility model provides a building EVA intermediate film for glass, includes the EVA resin layer, buries underground in the intraformational enhancement glue film of EVA resin and is used for the fixed establishment on fixed EVA resin layer, fixed establishment includes a plurality of solidification sleeves of wearing to establish the enhancement glue film, solidification sleeve both ends all carry out the terminal blocking through the wax sealing, the melting point on enhancement glue film is higher than the melting point on EVA resin layer, the melting point on wax sealing is less than the melting point on EVA resin layer.
Through above-mentioned technical scheme, in the course of working, the wax sealing absorbs the heat with the EVA resin layer jointly. Since the melting point of the wax seal is lower than that of the EVA resin layer, the wax seal melts before the EVA resin layer. After the wax sealing layer is melted, the melted EVA resin enters the curing sleeve, and the curing sleeve contains a part of liquid EVA resin, so that the possibility of the EVA resin overflowing from the space between the glass is reduced, and the product quality is improved. Because the melting point of strengthening the glue film is higher than the melting point of EVA resin layer, consequently when the EVA resin layer melts, strengthen the glue film still for solid-state to play the supporting role to solidification sleeve and EVA resin layer. In addition, after the EVA resin layer is cooled, the EVA resin in the curing sleeve ring and the EVA resin layer are connected into a whole, and the curing sleeve is wrapped in the curing sleeve ring, so that the strength of the EVA resin layer is improved.
Preferably: the fixing mechanism further comprises a connecting ring embedded in the wax sealing layer, and the connecting ring is connected with the curing sleeve through steel fibers.
Through above-mentioned technical scheme, steel fiber fixes the go-between, and the go-between supports the wax seal, has reduced the possibility that dislocation takes place for wax seal and solidification lantern ring in the course of working.
Preferably: the heat conduction assembly is arranged on the connecting ring and comprises a heat conduction column fixedly connected with the connecting ring, and the heat conduction column penetrates through the wax sealing layer and penetrates into the EVA resin layer.
Through above-mentioned technical scheme, when the EVA resin layer was heated, heat transfer in with the EVA resin layer of heat conduction post was to the wax sealing to accelerated the melting speed of wax sealing, reduced the unable timely melting possibility of wax sealing.
Preferably: the heat conduction assembly further comprises a heat conduction sheet, and the heat conduction sheet is fixedly connected to one end of the heat conduction column penetrating into the EVA resin layer.
Through above-mentioned technical scheme, the conducting strip has increased the area of contact between heat conduction post and the EVA resin layer, has further accelerated the speed that the wax envelope melts.
Preferably: the outer side wall of the curing sleeve is provided with threads, and the curing sleeve is in threaded connection with the reinforcing glue layer.
Through above-mentioned technical scheme, the solidification sleeve is connected through thread groove and enhancement glue film, and the thread groove has increased the area of contact of solidification sleeve with the enhancement glue film to carry on spacingly to the solidification sleeve, thereby further improved the telescopic stability of solidification, reduced the possibility of solidification sleeve slippage from strengthening the glue film.
Preferably: and a reinforcing rod is connected between every two adjacent curing sleeves.
Through above-mentioned technical scheme, support through the stiffener between the curing sleeve, in the processing later stage, when the reinforced adhesive layer begins to soften, the stiffener carries on spacingly to the curing sleeve to the telescopic possibility of sinking in the reinforced adhesive layer of curing has been reduced. In addition, after processing, the frame construction that solidification cover and stiffener constitute jointly plays the supporting role to EVA resin layer and reinforced adhesive layer, has improved the shock resistance of EVA resin layer and reinforced adhesive layer.
Preferably: the fixing mechanism further comprises an absorption assembly, and the absorption assembly comprises a porous cotton layer fixedly arranged on the inner wall of the curing sleeve.
Through above-mentioned technical scheme, after the EVA resin that melts in the EVA resin layer flowed into in the curing sleeve, the porous cotton layer absorbed the EVA resin to reduce the mobility of EVA resin, reduced the possibility that EVA resin spilled over from curing sleeve.
Preferably: the absorption assembly further comprises two diversion lantern rings arranged in the curing sleeve, the two diversion lantern rings are respectively arranged at two ports of the curing sleeve, and the diameter of each diversion lantern ring is gradually increased along the direction away from the wax sealing layer.
Through the technical scheme, in the process that liquid EVA resin enters the curing sleeve through the diversion lantern ring, the diameter of the diversion lantern ring is increased, so that the pressure of the liquid EVA resin is gradually reduced, and the pressure difference is formed between the liquid EVA resin and the liquid EVA resin in the EVA resin layer, and the speed of the EVA resin entering the curing sleeve is accelerated under the pushing of the pressure difference, so that the possibility of overflow of the EVA resin is reduced. In addition, when the liquid EVA resin in the curing sleeve flows out of the curing sleeve, the liquid EVA resin is hindered by the inner wall of the diversion sleeve ring, so that the possibility that the liquid EVA resin overflows out of the curing sleeve is reduced.
Preferably: the absorption assembly further comprises a helical blade, the helical blade is arranged on one side, away from the curing sleeve, of the porous cotton layer, and the helical blade is fixedly connected with the flow guide sleeve ring.
Through above-mentioned technical scheme, back in liquid EVA resin gets into the solidification sleeve, helical blade blocks liquid EVA resin, and liquid EVA resin flows along helical blade to continuously being absorbed by the porous cotton layer at the flow in-process, thereby improved the efficiency that the porous cotton layer absorbed liquid EVA resin.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through the arrangement of the curing sleeve and the wax sealing layer, when the wax sealing layer is melted during processing, the curing sleeve absorbs the liquid EVA resin, so that the possibility that the liquid EVA resin overflows from the space between the glass plates is reduced; when the EVA resin layer is melted, the reinforcing glue layer is still solid, so that the reinforcing glue layer plays a supporting role for the curing sleeve and the EVA resin layer;
2. through the setting of stiffener, a plurality of solidification sleeves form a whole to improved the joint degree of solidification sleeve and reinforced adhesive layer, reduced the sunken possibility of solidification sleeve in reinforced adhesive layer.
Drawings
Fig. 1 is a schematic structural diagram of an EVA intermediate film for architectural glass according to an embodiment of the present application.
FIG. 2 is a schematic diagram for showing the internal structure of an EVA intermediate film for building glass in the embodiment of the application.
Fig. 3 is a front view of a structure for embodying a fixing mechanism according to an embodiment of the present application.
Fig. 4 is a sectional view taken along a-a in fig. 3.
Reference numerals: 1. an EVA resin layer; 2. a reinforcing glue layer; 3. a fixing mechanism; 31. an absorbent assembly; 311. a porous cotton layer; 312. a flow guide sleeve ring; 313. a helical blade; 32. curing the sleeve; 33. a connecting ring; 4. a reinforcing bar; 5. wax sealing layer; 6. steel fibers; 7. a heat conducting component; 71. a heat-conducting column; 72. a heat conductive sheet.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses an EVA (ethylene vinyl acetate) intermediate film for building glass. Referring to fig. 1 and 2, the EVA intermediate film for the building glass comprises an EVA resin layer 1, a reinforcing adhesive layer 2 and a fixing mechanism 3, wherein the reinforcing adhesive layer 2 is embedded inside the EVA resin layer 1 and is parallel to the EVA resin layer 1, the reinforcing adhesive layer 2 is made of sarin resin, and the melting point of the reinforcing adhesive layer 2 is higher than that of the EVA resin layer 1. In the process of processing laminated glass, the reinforcing glue layer 2 supports the EVA resin layer 1, and the fixing mechanism 3 fixes the liquid EVA resin generated after the EVA resin layer 1 is melted, so that the possibility of overflowing the liquid EVA resin from the glass plates is reduced.
Referring to fig. 3 and 4, the fixing mechanism 3 includes an absorption assembly 31, a plurality of curing sleeves 32 and a plurality of connecting rings 33, threads are provided on the outer side wall of the curing sleeve 32, the plurality of curing sleeves 32 penetrate through the reinforcing glue layer 2 along a direction perpendicular to the reinforcing glue layer 2 and are in threaded connection with the reinforcing glue layer 2, and through the arrangement of the threads, the connection between the curing sleeve 32 and the reinforcing glue layer 2 is tighter, and the possibility that the curing sleeve 32 slips from the reinforcing glue layer 2 is reduced; a plurality of reinforcing rods 4 are embedded in the reinforcing adhesive layer 2, and two ends of each reinforcing rod 4 are fixedly connected with two adjacent curing sleeves 32 respectively; the two ends of the curing sleeve 32 are provided with the wax sealing layers 5 and extend into the EVA resin layer 1, the wax sealing layers 5 are used for sealing the curing sleeve 32, and the melting point of the wax sealing layers 5 is lower than that of the EVA resin layer 1; the connecting ring 33 is embedded in the wax seal layer 5, the connecting ring 33 is fixedly connected with the curing sleeve 32 through the steel fibers 6, and the connecting ring 33 plays a role in supporting and limiting the wax seal layer 5, so that the possibility of separation of the wax seal layer 5 and the curing sleeve ring is reduced.
Referring to fig. 3 and 4, the absorbent assembly 31 is disposed in the curing sleeve 32, the absorbent assembly 31 includes a porous cotton layer 311, a flow guiding collar 312 and a helical blade 313, the porous cotton layer 311 is bonded on the inner wall of the curing sleeve 32, and the length of the porous cotton layer 311 is smaller than that of the curing sleeve 32; the flow guide sleeve rings 312 are arranged at two ends of the porous cotton layer 311, and the diameter of the flow guide sleeve rings 312 is gradually reduced along the direction far away from the porous cotton layer 311; the helical blade 313 is arranged on one side of the porous cotton layer 311 departing from the curing sleeve 32, and the helical blade 313 is fixedly connected with the guide sleeve ring 312.
Referring to fig. 3 and 4, after the liquid EVA resin enters the curing sleeve 32, it first passes through the flow guiding collar 312, and during the movement of the liquid EVA resin, the flow guiding collar 312 is increased, so that the pressure of the liquid EVA resin is reduced and forms a pressure difference with the liquid EVA resin outside the curing sleeve 32, and the liquid EVA resin is accelerated into the curing sleeve 32 under the pushing of the pressure difference. After flowing through the guide sleeve ring 312, the liquid EVA resin continues flowing along the spiral blade 313 and is continuously absorbed by the porous cotton layer 311 during the flowing process. When the liquid EVA resin flows out of the curing sleeve 32, the diameter of the deflector collar 312 decreases, thereby blocking the liquid EVA resin and reducing the likelihood of the liquid EVA resin overflowing the curing sleeve 32. In addition, after the liquid EVA resin is cooled and solidified, the EVA resin in the curing sleeve 32 is integrated with the porous cotton layer 311, the helical blade 313 and the EVA resin outside the curing sleeve 32, thereby supporting the EVA resin layer 1 and improving the strength of the EVA resin layer 1.
Referring to fig. 3 and 4, during processing, because the melting point of the wax sealing layer 5 is low, the wax sealing layer 5 is firstly melted and the end of the curing sleeve 32 is removed, then the EVA resin layer 1 is melted, and the liquid EVA resin generated after melting flows into the curing sleeve 32 and is absorbed by the absorption assembly 31, so that the possibility that the liquid EVA resin overflows out of the glass plate is reduced, the thickness of the EVA resin layer 1 is more uniform, and the quality of the laminated glass is improved. At the processing later stage, the reinforcement glue layer 2 begins to soften, and at this moment, because the connecting rod connects a plurality of solidification sleeves 32 as a whole, consequently strengthened being connected between solidification sleeve 32 and the reinforcement glue layer 2 to make the pressure of solidification sleeve 32 evenly disperse in whole reinforcement glue layer 2, thereby reduced the gravity of solidification sleeve 32 and made the possibility of reinforcement glue layer 2 deformation. In addition, because the connecting rod and the curing sleeve 32 jointly form a frame structure, the impact force applied to the laminated glass can be uniformly dispersed, and the impact resistance of the EVA resin layer 1 and the reinforcing adhesive layer 2 is improved.
Referring to fig. 3 and 4, the connection ring 33 is provided with a heat conduction assembly 7, the heat conduction assembly 7 includes a plurality of heat conduction columns 71 and a plurality of heat conduction sheets 72, and the heat conduction sheets 72 and the heat conduction columns 71 are made of copper. The heat conducting column 71 is arranged along the axial direction of the curing sleeve 32 and is fixedly connected with the end face of one side, away from the curing sleeve 32, of the connecting ring 33, the heat conducting fins 72 are fixedly connected to one end, away from the curing sleeve 32, of the heat conducting column 71, the heat conducting column 71 penetrates through the wax sealing layer 5 and penetrates through the EVA resin layer 1, two heat conducting fins 72 are fixedly connected to one heat conducting column 71, the two heat conducting fins 72 are embedded in the EVA resin layer 1, and the two heat conducting fins 72 are arranged at intervals; each connecting ring 33 is fixedly connected with four heat-conducting columns 71, and the four heat-conducting columns 71 are arranged at equal intervals along the circumference of the connecting ring 33. During processing, the heat conducting sheet 72 and the heat conducting column 71 absorb heat in the EVA resin layer 1 and transfer the heat to the wax sealing layer 5, so that melting of the wax sealing layer 5 is accelerated, and absorption of liquid EVA resin by the absorption assembly 31 in the curing sleeve 32 is promoted.
The implementation principle of the EVA intermediate film for the building glass in the embodiment of the application is as follows: when the laminated glass is produced, the wax sealing layer 5 is firstly heated and melted, the blockage of the curing sleeve 32 is removed, then the EVA resin layer 1 flows into the curing sleeve 32 after being melted and is absorbed by the absorption assembly 31, so that the possibility that liquid EVA resin overflows from between glass plates is reduced, the EVA resin layer 1 is more uniform, and the quality of the laminated glass is improved. In addition, during the melting of the wax sealing layer 5, the heat conducting member 7 transfers the heat in the EVA resin layer 1 to the wax sealing layer 5, thereby promoting the melting of the wax sealing layer 5.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The EVA intermediate film for the building glass is characterized in that: including EVA resin layer (1), bury reinforcing glue film (2) in EVA resin layer (1) underground and be used for fixed EVA resin layer (1) fixed establishment (3), fixed establishment (3) include a plurality of solidification sleeves (32) of wearing to establish reinforcing glue film (2), solidification sleeve (32) both ends all carry out the terminal capping through wax sealing (5), the melting point of reinforcing glue film (2) is higher than the melting point of EVA resin layer (1), the melting point of wax sealing (5) is less than the melting point of EVA resin layer (1).
2. The EVA interlayer film for building glass according to claim 1, wherein: the fixing mechanism (3) further comprises a connecting ring (33) embedded in the wax sealing layer (5), and the connecting ring (33) is connected with the curing sleeve (32) through steel fibers (6).
3. The EVA interlayer film for building glass according to claim 2, wherein: be equipped with heat conduction subassembly (7) on go-between (33), heat conduction subassembly (7) include with go-between (33) fixed connection's heat conduction post (71), wax sealing (5) are worn to establish in heat conduction post (71) to wear to establish into EVA resin layer (1).
4. The EVA interlayer film for building glass according to claim 3, wherein: the heat conduction assembly (7) further comprises a heat conduction sheet (72), and the heat conduction sheet (72) is fixedly connected to one end of the heat conduction column (71) penetrating into the EVA resin layer (1).
5. The EVA interlayer film for building glass according to claim 1, wherein: the outer side wall of the curing sleeve (32) is provided with threads, and the curing sleeve (32) is in threaded connection with the reinforcing glue layer (2).
6. The EVA interlayer film for building glass according to claim 1, wherein: and a reinforcing rod (4) is connected between every two adjacent curing sleeves (32).
7. The EVA interlayer film for building glass according to claim 1, wherein: the fixing mechanism (3) further comprises an absorption component (31), and the absorption component (31) comprises a porous cotton layer (311) fixedly arranged on the inner wall of the curing sleeve (32).
8. The EVA interlayer film for building glass according to claim 7, wherein: the absorption assembly (31) further comprises two flow guide sleeve rings (312) arranged in the curing sleeve (32), the two flow guide sleeve rings (312) are respectively arranged at two ports of the curing sleeve (32), and the diameters of the flow guide sleeve rings (312) are gradually increased along the direction far away from the wax sealing layer (5).
9. The EVA interlayer film for building glass according to claim 8, wherein: the absorption assembly (31) further comprises a spiral blade (313), the spiral blade (313) is arranged on one side, away from the curing sleeve (32), of the porous cotton layer (311), and the spiral blade (313) is fixedly connected with the flow guide sleeve ring (312).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120870009.3U CN214688346U (en) | 2021-04-25 | 2021-04-25 | EVA intermediate film for building glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120870009.3U CN214688346U (en) | 2021-04-25 | 2021-04-25 | EVA intermediate film for building glass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214688346U true CN214688346U (en) | 2021-11-12 |
Family
ID=78533924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120870009.3U Expired - Fee Related CN214688346U (en) | 2021-04-25 | 2021-04-25 | EVA intermediate film for building glass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214688346U (en) |
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2021
- 2021-04-25 CN CN202120870009.3U patent/CN214688346U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
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