CN104528695B - A kind of preparation method of graphene film coiled material and device - Google Patents
A kind of preparation method of graphene film coiled material and device Download PDFInfo
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Abstract
The present invention relates to a kind of preparation method and device of graphene film coiled material, belong to technical field of graphene preparation.The preparation method of graphene film coiled material comprises: adjacent growth had the Copper Foil thin slice of Graphene to utilize conductive resin to connect, and forms continuous print Copper Foil thin slice; Soft objectives carrier one side applies optic-solidified adhesive, then soft objectives carrier is scribbled the one side of optic-solidified adhesive with the one side pressing of continuous print Copper Foil thin slice optic-solidified adhesive is solidified, and above-mentioned steps carries out twice, Copper Foil thin slice two sides is all adhered to soft objectives carrier; Soft objectives carrier rolls rear formation coiled material raw material; Coiled material prepared using electrochemical stripping method is peeled off; In stripping process, the graphene layer of coiled material raw material is separated with copper foil layer and forms coiled material primary products, and described coiled material primary products comprise soft objectives carrier layer, photocuring glue-line and graphene layer; Coiled material primary products obtain individual layer continuous graphite alkene film coil through last handling process.
Description
Technical field
The invention belongs to technical field of graphene preparation, particularly relate to a kind of preparation method of graphene film coiled material, and for the preparation of the device of individual layer continuous graphite alkene film coil; Achieve Graphene from the growth substrate of sheet to the seamless branches of the target substrate fast and low-cost of coiled material shape.
Background technology
Graphene is the hexagonal honey comb structure that carbon atom forms based on sp2 hydridization, the only two dimensional crystal of an atomic layers thick.Although single-layer graphene is just obtained by mechanically peel graphite experimentally first for 2004, the character due to its uniqueness excites the research interest of countless researcher, and obtains in a few years in the past and study widely.Graphene has excellent power, heat, the character such as optical, electrical, is almost completely transparent, only has the light absorption ratio of 2.3% in all wave band; Thermal conductivity is up to 5300W/mK, and under normal temperature, its electronic mobility is more than 15000cm
2/ Vs, and resistivity only about 10
-6Ω cm is the material that resistivity is minimum in the world at present.And AndreGeim and KonstantinNovoselov also obtains 2010 years Nobel Prizes in physics because of its initiative work in Graphene.Graphene is not only applicable to basic physics research, have broad application prospects, as molecular detector, thermal conductance/heat interfacial material, field emission source, ultracapacitor, solar cell, the rare lithium cell of graphite and unicircuit, transparency conductive electrode etc. in fields such as display, the energy, detection, photoelectrons.The applied research of Graphene has great market outlook, will bring revolutionary transformation to numerous research field.
But the single-layer graphene of current large-area high-quality can only pass through chemical vapour deposition (CVD) method and grow in the substrate of the metal catalytic such as copper or nickel, need to transfer to further in other target substrate and could use, and by CVD equipment and process technology limit, the graphene film that existing CVD obtains is all the sheet structure that size is less, is unfavorable for operation in subsequent production process and deposits.
In addition, in existing method, in Graphene transfer process, a transforming growth has the Graphene of the Copper Foil thin slice side of Graphene, and growth has the Copper Foil thin slice utilization ratio of Graphene only to have half, and production efficiency is low, and cost is high.
Summary of the invention
Technical problem to be solved by this invention is to provide the preparation method of graphene film coiled material, with solve utilize chemical Vapor deposition process to obtain graphene film be all the sheet structure that size is less, be unfavorable for operation in subsequent production process and deposit, and transfer efficiency is low; And a transforming growth has the Graphene of the Copper Foil thin slice side of Graphene in Graphene transfer process, growth has the Copper Foil thin slice utilization ratio of Graphene only to have half, and production efficiency is low, the problem that cost is high.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of preparation method of graphene film coiled material, comprises the following steps:
Step 1, makes growth have the Copper Foil thin slice of Graphene adjacent successively, adjacent Copper Foil thin slice overlap 0.1 ~ 1cm; Conductive resin is bonded in the overlapping of adjacent Copper Foil thin slice, Copper Foil thin slice is coupled together;
Step 2, the first soft objectives carrier one side applies optic-solidified adhesive, then the first soft objectives carrier to be scribbled the one side of optic-solidified adhesive with the one side pressing of Copper Foil thin slice optic-solidified adhesive is solidified; Second soft objectives carrier one side applies optic-solidified adhesive, then the second soft objectives carrier to be scribbled the one side of optic-solidified adhesive with the another side pressing of Copper Foil thin slice optic-solidified adhesive is solidified;
Soft objectives carrier rolls rear formation coiled material raw material; Coiled material raw material comprises the first soft objectives carrier layer, the first photocuring glue-line, the first graphene layer, copper foil layer, the second graphene layer, the second photocuring glue-line and the second soft objectives carrier layer;
Step 3, coiled material prepared using electrochemical stripping method is peeled off; In stripping process, the graphene layer of coiled material raw material is separated with copper foil layer and forms coiled material primary products, and described coiled material primary products comprise soft objectives carrier layer, photocuring glue-line and graphene layer;
Step 4, coiled material primary products obtain individual layer continuous graphite alkene film coil through last handling process.
The preparation method of graphene film coiled material as above, further, the last handling process in step 4 is: coiled material primary products are put into deionized water, hydrochloric acid, doping agent, deionized water successively and soaks 5 ~ 30 minutes respectively, then dry up; The coiled material primary products launched, at surface-coated one deck conductive polymer protective membrane of graphene layer, then lay electrostatic protection film on conductive polymer protective membrane.
The preparation method of graphene film coiled material as above, further, first the first soft objectives carrier layer of coiled material raw material, the first photocuring glue-line, the first graphene layer and the first copper foil layer, the second copper foil layer, the second graphene layer, the second photocuring glue-line, the second soft objectives carrier layer are separated; Then the second soft objectives carrier layer, the second photocuring glue-line, the second graphene layer are separated with the second copper foil layer, the first copper foil layer.
The preparation method of graphene film coiled material as above, further, the thickness of coating optic-solidified adhesive is less than 2um.
The preparation method of graphene film coiled material as above, further, the material of described soft objectives carrier is the one in polyethylene terephthalate, polycarbonate, silicone resin and tetrafluoroethylene.
The preparation method of graphene film coiled material as above, further, growth has the copper thickness of the Copper Foil thin slice of Graphene to be 5 ~ 500 μm.
The preparation method of graphene film coiled material as above, further, growth has the copper thickness of the Copper Foil thin slice of Graphene to be 25 μm.
The invention has the beneficial effects as follows: growth has the Graphene of the Copper Foil thin slice both sides of Graphene to be all connected with soft objectives carrier, peels off at twice, take full advantage of the Graphene that Copper Foil grows, efficiency be doubled, reduce costs during stripping.In addition, in the present invention, growth has the Copper Foil thin slice of Graphene to be linked together by forming continuous print Graphene coiled material after the stripping of electrochemistry bubbling and coated with conductive macromolecule layer by conductive resin, is convenient to the operation in subsequent production process and deposits.
In order to realize the preparation method of above-mentioned individual layer continuous graphite alkene film coil, the present invention also provides a kind of equipment for the preparation of individual layer continuous graphite alkene film coil, and it comprises:
Conductive resin laminating apparatus, for conductive glue there to be the Copper Foil thin slice of Graphene to growth, makes adjacent Copper Foil thin slice connect, forms continuous print Copper Foil thin slice;
Optic-solidified adhesive coating, pressing, solidification equipment, for applying optic-solidified adhesive to soft objectives carrier one side, the one side pressing of the one side then soft objectives carrier being scribbled optic-solidified adhesive and continuous Copper Foil thin slice also makes optic-solidified adhesive solidify; Soft objectives carrier rolls rear formation coiled material raw material;
Coiled material raw material stripping off device, for the graphene layer of coiled material raw material and copper foil layer being peeled off, form coiled material primary products, described coiled material primary products comprise soft objectives carrier layer, photocuring glue-line and graphene layer;
After-treatment device, for cleaning coiled material primary products, doping and armor coatedly obtain individual layer continuous graphite alkene film coil;
Coiled material raw material stripping off device comprises:
Electrochemistry bubbling pond, holds electrolytic solution in described electrochemistry bubbling pond;
Coiled material feedstock device, is arranged on the side in described electrochemistry bubbling pond;
Copper foil layer coiler, comprising: metal roller bearing; Stainless steel roller, described stainless steel roller is arranged on described metal roller bearing; Motor, described motor drives stainless steel roller to rotate; Metal ring clevis, copper foil layer is clamped on stainless steel roller by described metal ring clevis; Described copper foil layer coiler is electrically connected with power cathode;
The stainless steel plate be electrically connected with positive source, stainless steel plate is using Graphene as preservative coat; Described stainless steel plate is arranged on the inside in described electrochemistry bubbling pond, immerses electrolytic solution.
As above for the preparation of the equipment of individual layer continuous graphite alkene film coil, further, the clamping degree of described metal ring clevis is adjustable.
The invention has the beneficial effects as follows:
Stainless steel roller, using Graphene as preservative coat, prevents the corrosion of the electrolytic solution such as NaOH, increases the work-ing life of equipment;
The coiled material raw material stripping off device of optimization design ensure that the high quality of Graphene; Bubble is produced between Copper Foil and Graphene, stainless steel roller idle running when the bonding force between Copper Foil and Graphene is greater than the pulling force that stainless steel pair of rollers Copper Foil applies when peeling off; Rotate together with stainless steel roller drive Copper Foil when the bonding force between Copper Foil with Graphene is less than the pulling force of stainless steel pair of rollers Copper Foil applying, said apparatus better can keep the integrity degree of coiled material primary products, prevents from rupturing in stripping process.
Accompanying drawing explanation
The optic-solidified adhesive coating that Fig. 1 provides for an embodiment of the present invention, pressing, solidification equipment schematic diagram;
Coiled material raw material stripping off device, after-treatment device schematic diagram that Fig. 2 provides for an embodiment of the present invention.
In accompanying drawing, the list of parts representated by each label is as follows:
11, conveying belt, 12, pressing cylinder, 13, light curring unit; 14, rolling cylinder, 21, electrochemistry bubbling pond, 22, coiled material feedstock device; 24, copper foil layer coiler, 25, stainless steel plate, 26, stationary fixture; 31, coiled material primary products cleaning, doper; 32, protective layer coating unit, 82, coiled material raw material, 91, copper foil layer; 92, graphene layer, 93, soft objectives carrier.
Embodiment
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of preparation method of graphene film coiled material, comprises the following steps:
Step 1, makes growth have the Copper Foil thin slice of Graphene adjacent successively, adjacent Copper Foil thin slice overlap 0.1 ~ 1cm; Conductive resin is bonded in the overlapping of adjacent Copper Foil thin slice, Copper Foil thin slice is coupled together; Concrete, such as neighbours growth has the Copper Foil thin slice overlapping dimension of Graphene to be set as distance 0.5cm, utilizes conductive resin to be linked together the side of Copper Foil thin slice.Utilizing conductive resin to be when carrying out subsequent electrochemical and peeling off by growing the object having the Copper Foil thin slice of Graphene to connect, making Copper Foil thin slice form continuous print conductor, being convenient to carrying out continuously of electrochemical stripping.
Step 2, the first soft objectives carrier one side applies optic-solidified adhesive, then the first soft objectives carrier to be scribbled the one side of optic-solidified adhesive with the one side pressing of Copper Foil thin slice optic-solidified adhesive is solidified; Second soft objectives carrier one side applies optic-solidified adhesive, then the second soft objectives carrier to be scribbled the one side of optic-solidified adhesive with the another side pressing of Copper Foil thin slice optic-solidified adhesive is solidified;
Soft objectives carrier rolls rear formation coiled material raw material; Coiled material raw material comprises the first soft objectives carrier layer, the first photocuring glue-line, the first graphene layer, copper foil layer, the second graphene layer, the second photocuring glue-line and the second soft objectives carrier layer successively;
Step 3, coiled material prepared using electrochemical stripping method is peeled off; In stripping process, the graphene layer of coiled material raw material is separated with copper foil layer and forms coiled material primary products, and described coiled material primary products comprise soft objectives carrier layer, photocuring glue-line and graphene layer successively;
Step 4, coiled material primary products obtain individual layer continuous graphite alkene film coil through last handling process.
The Graphene that growth has Copper Foil thin slice both sides of Graphene respectively with soft objectives carrier binder, peel off at twice during stripping, take full advantage of the Graphene that Copper Foil grows, efficiency is doubled, reduce costs.In the present invention, growth has the Copper Foil thin slice of Graphene to be linked together by forming continuous print Graphene coiled material after the stripping of electrochemistry bubbling and coated with conductive macromolecule layer by conductive resin, is convenient to the operation in subsequent production process and deposits.
In one of the present invention more specifically embodiment, the last handling process in step 4 is: coiled material primary products are put into deionized water, hydrochloric acid, doping agent, deionized water successively and soaks 5 ~ 30 minutes respectively, then dry up; The coiled material primary products launched, at surface-coated one deck conductive polymer protective membrane of graphene layer, then lay electrostatic protection film on conductive polymer protective membrane.In a kind of specific embodiment, coiled material primary products are put into deionized water 5 minutes, hydrochloric acid 8 minutes, doping agent 20 minutes, deionized water 5 minutes, complete the cleaning of coiled material primary products.The mass concentration of hydrochloric acid used is 10% ~ 20%.Described doping agent is selected from gold trichloride, HNO
3, HCL.
In one of the present invention more specifically embodiment, step 3, first separates the first soft objectives carrier layer of coiled material raw material, the first photocuring glue-line, the first graphene layer and copper foil layer, the second graphene layer, the second photocuring glue-line, the second soft objectives carrier layer; Then the second soft objectives carrier layer, the second photocuring glue-line, the second graphene layer are separated with copper foil layer.In stripping process, the graphene layer of coiled material raw material is separated with copper foil layer and forms coiled material primary products, and described coiled material primary products comprise soft objectives carrier layer, photocuring glue-line and graphene layer.Namely a kind of coiled material primary products are the first soft objectives carrier layer, the first photocuring glue-line, the first graphene layer.Another kind of coiled material primary products are two soft objectives carrier layer, the second photocuring glue-line, the second graphene layer.
In one of the present invention more specifically embodiment, in step 2, the thickness of coating optic-solidified adhesive is less than 2um.
In one of the present invention more specifically embodiment, the material of described soft objectives carrier is the one in polyethylene terephthalate, polycarbonate, silicone resin and tetrafluoroethylene.
In one of the present invention more specifically embodiment, growth has the copper thickness of the Copper Foil thin slice of Graphene to be 5 ~ 500 μm.Be more preferably 25 μm.
In order to realize the preparation method of above-mentioned graphene film coiled material, the embodiment of the present invention also provides a kind of equipment for the preparation of individual layer continuous graphite alkene film coil, and it comprises:
Conductive resin laminating apparatus, for conductive glue there to be the Copper Foil thin slice of Graphene to growth, makes adjacent Copper Foil thin slice connect, forms continuous print Copper Foil thin slice; In specific implementation process, conductive resin laminating apparatus comprises Copper Foil thin slice feeding unit, e Foerderanlage, discharging device, and feeding unit is continuously to e Foerderanlage supply Copper Foil thin slice, and conductive resin is bonded in the copper-clad surface of adjacent Copper Foil thin slice by discharging device.The such as overlapping 0.5cm of adjacent edge between every two Copper Foil thin slices, makes Copper Foil thin slice be bonded together to the overlapping region of Copper Foil thin slice conductive glue.Utilizing conductive resin to be when carrying out subsequent electrochemical and peeling off by growing the object having the Copper Foil thin slice of Graphene to connect, making Copper Foil thin slice form continuous print conductor, being convenient to carrying out continuously of electrochemical stripping.
Optic-solidified adhesive coating, pressing, solidification equipment, for applying optic-solidified adhesive to soft objectives carrier one side, then soft objectives carrier being scribbled the one side of optic-solidified adhesive with the one side pressing of Copper Foil thin slice makes optic-solidified adhesive solidify; Apply optic-solidified adhesive and bonding processes in the present invention and repeat twice, realize the first soft objectives carrier and scribble the one side of optic-solidified adhesive with the one side pressing of Copper Foil thin slice optic-solidified adhesive is solidified; Second soft objectives carrier scribbles the one side of optic-solidified adhesive with the another side pressing of Copper Foil thin slice makes optic-solidified adhesive solidify.
Soft objectives carrier rolls rear formation coiled material raw material; Coiled material raw material comprises the first soft objectives carrier layer, the first photocuring glue-line, the first graphene layer, copper foil layer, the second graphene layer, the second photocuring glue-line and the second soft objectives carrier layer;
As shown in Figure 1, optic-solidified adhesive coating, pressing, solidification equipment comprise: optic-solidified adhesive coating unit, and optic-solidified adhesive is coated in soft objectives carrier one side by optic-solidified adhesive coating unit.Conveying belt 11, for mobile continuous print Copper Foil thin slice.The copper foil layer 91 of continuous print Copper Foil thin slice contacts with conveying belt.Pressing cylinder 12, applies pressure and soft objectives carrier 93 is scribbled the one side of optic-solidified adhesive and the one side pressing of continuous Copper Foil laminated layer 92.Light curring unit 13, is arranged on the discharge end of pressing cylinder, and its release light makes optic-solidified adhesive realize solidification.Rolling cylinder 14, for rolling rear formation coiled material raw material by soft objectives carrier.
Coiled material raw material stripping off device, for the graphene layer of coiled material raw material and copper foil layer being peeled off, form coiled material primary products, described coiled material primary products comprise soft objectives carrier layer, photocuring glue-line and graphene layer;
After-treatment device, for cleaning coiled material primary products, doping and armor coatedly obtain individual layer continuous graphite alkene film coil.As shown in Figure 2, after-treatment device comprises the cleaning of coiled material primary products, doper 31 and protective layer coating unit 32.
As shown in Figure 2, be a kind of coiled material raw material stripping off device of embodiment, it comprises:
Electrochemistry bubbling pond 21, holds electrolytic solution in described electrochemistry bubbling pond; In specific implementation process, electrolytic solution is selected from sodium hydroxide, sodium sulfate, potassium hydroxide etc.
Coiled material feedstock device 22, is arranged on the side in described electrochemistry bubbling pond; Coiled material raw material 82 is placed in coiled material feedstock device.
Copper foil layer coiler 24, comprising: metal roller bearing; Stainless steel roller, described stainless steel roller is arranged on described metal roller bearing; Motor, described motor drives stainless steel roller to rotate; Metal ring clevis, copper foil layer is clamped on stainless steel roller by described metal ring clevis; Described copper foil layer coiler is electrically connected with power cathode;
Stationary fixture 26, realizes the location of coiled material raw material in electrochemistry bubbling pond 21.Concrete, be two adjacent cylinders, the suitable distance in interval between cylinder, enables coiled material raw material pass through.That has passed stationary fixture realizes coiled material under electrochemical action, realizes graphene layer and is separated with copper foil layer, realizes further peeling off under the traction of copper foil layer coiler.
The stainless steel plate 25 be electrically connected with positive source, stainless steel plate is using Graphene as preservative coat; Described stainless steel plate is arranged on the inside in described electrochemistry bubbling pond, immerses electrolytic solution.
As above for the preparation of the equipment of individual layer continuous graphite alkene film coil, further, the clamping degree of described metal ring clevis is adjustable.In a kind of specific embodiment, described metal ring clevis is elastic rubber ring, by the different clamping degrees selecting the elastic rubber ring of different diameter deliberately to realize Copper Foil.
Bubble is produced between Copper Foil and Graphene, stainless steel roller idle running when the bonding force between Copper Foil and Graphene is greater than the pulling force that stainless steel pair of rollers Copper Foil applies when peeling off; Rotate together with stainless steel roller drive Copper Foil when the bonding force between Copper Foil with Graphene is less than the pulling force of stainless steel pair of rollers Copper Foil applying, said apparatus better can keep the integrity degree of coiled material primary products, prevents from rupturing in stripping process.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a preparation method for graphene film coiled material, is characterized in that, comprises the following steps:
Step 1, makes growth have the Copper Foil thin slice of Graphene adjacent successively, adjacent Copper Foil thin slice overlap 0.1 ~ 1cm; Conductive resin is bonded in the overlapping of adjacent Copper Foil thin slice, Copper Foil thin slice is coupled together;
Step 2, the first soft objectives carrier one side applies optic-solidified adhesive, then the first soft objectives carrier to be scribbled the one side of optic-solidified adhesive with the one side pressing of Copper Foil thin slice optic-solidified adhesive is solidified; Second soft objectives carrier one side applies optic-solidified adhesive, then the second soft objectives carrier to be scribbled the one side of optic-solidified adhesive with the another side pressing of Copper Foil thin slice optic-solidified adhesive is solidified;
Soft objectives carrier rolls rear formation coiled material raw material; Coiled material raw material comprises the first soft objectives carrier layer, the first photocuring glue-line, the first graphene layer, copper foil layer, the second graphene layer, the second photocuring glue-line and the second soft objectives carrier layer;
Step 3, coiled material prepared using electrochemical stripping method is peeled off; Stripping process is specifically: first the first soft objectives carrier layer of coiled material raw material, the first photocuring glue-line, the first graphene layer and copper foil layer, the second graphene layer, the second photocuring glue-line, the second soft objectives carrier layer are separated; Then the second soft objectives carrier layer, the second photocuring glue-line, the second graphene layer are separated with copper foil layer;
Step 4, coiled material primary products obtain individual layer continuous graphite alkene film coil through last handling process.
2. the preparation method of graphene film coiled material according to claim 1, it is characterized in that, last handling process in step 4 is: coiled material primary products are put into deionized water, hydrochloric acid, doping agent, deionized water successively and soaks 5 ~ 30 minutes respectively, then dry up; The coiled material primary products launched, at surface-coated one deck conductive polymer protective membrane of graphene layer, then lay electrostatic protection film on conductive polymer protective membrane.
3. the preparation method of graphene film coiled material according to claim 1, is characterized in that, the thickness of coating optic-solidified adhesive is less than 2 μm.
4. the preparation method of graphene film coiled material according to claim 1, is characterized in that, the material of described soft objectives carrier is the one in polyethylene terephthalate, polycarbonate, silicone resin and tetrafluoroethylene.
5. the preparation method of graphene film coiled material according to claim 1, is characterized in that, growth has the copper thickness of the Copper Foil thin slice of Graphene to be 5 ~ 500 μm.
6. the preparation method of graphene film coiled material according to claim 5, is characterized in that, growth has the copper thickness of the Copper Foil thin slice of Graphene to be 25 μm.
7., for the preparation of an equipment for individual layer continuous graphite alkene film coil, it is characterized in that, comprising:
Conductive resin laminating apparatus, for conductive glue there to be the Copper Foil thin slice of Graphene to growth, makes adjacent Copper Foil thin slice connect, forms continuous print Copper Foil thin slice;
Optic-solidified adhesive coating, pressing, solidification equipment, for applying optic-solidified adhesive to soft objectives carrier one side, then soft objectives carrier being scribbled the one side of optic-solidified adhesive with the one side pressing of continuous print Copper Foil thin slice makes optic-solidified adhesive solidify; Soft objectives carrier rolls rear formation coiled material raw material;
Coiled material raw material stripping off device, for the graphene layer of coiled material raw material and copper foil layer being peeled off, form coiled material primary products, described coiled material primary products comprise soft objectives carrier layer, photocuring glue-line and graphene layer;
After-treatment device, for cleaning coiled material primary products, doping and armor coatedly obtain individual layer continuous graphite alkene film coil;
Coiled material raw material stripping off device comprises:
Electrochemistry bubbling pond, holds electrolytic solution in described electrochemistry bubbling pond;
Coiled material feedstock device, is arranged on the side in described electrochemistry bubbling pond;
Copper foil layer coiler, comprising: metal roller bearing; Stainless steel roller, described stainless steel roller is arranged on described metal roller bearing; Motor, described motor drives stainless steel roller to rotate; Metal ring clevis, copper foil layer is clamped on stainless steel roller by described metal ring clevis; Described copper foil layer coiler is electrically connected with power cathode;
The stainless steel plate be electrically connected with positive source, stainless steel plate is using Graphene as preservative coat; Described stainless steel plate is arranged on the inside in described electrochemistry bubbling pond, immerses electrolytic solution.
8. the equipment for the preparation of individual layer continuous graphite alkene film coil according to claim 7, is characterized in that, the clamping degree of described metal ring clevis is adjustable.
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