CN107554019A - It is a kind of it is three-layer co-extruded go out polyethylene film and preparation method thereof - Google Patents
It is a kind of it is three-layer co-extruded go out polyethylene film and preparation method thereof Download PDFInfo
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- CN107554019A CN107554019A CN201710723346.8A CN201710723346A CN107554019A CN 107554019 A CN107554019 A CN 107554019A CN 201710723346 A CN201710723346 A CN 201710723346A CN 107554019 A CN107554019 A CN 107554019A
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Abstract
The invention discloses it is a kind of it is three-layer co-extruded go out weather-resistance polyethylene film and preparation method thereof, it is three-layer co-extruded go out weather-resistance polyethylene film by internal layer, middle level, outer layer three-decker coextrusion form, the internal layer and the outer layer are tack coat, the middle level is UV-blocking layer, it is prepared using the coextrusion of three laminar flow saliva or three layers of blown film coextrusion method, the present invention it is three-layer co-extruded go out polyethylene film in, ectonexine is PE layers, with polyethylene terephthalate（PET）, ethylene-vinyl acetate copolymer（EVA）There is good adhesive property, be advantageous to the surface strong bond of film and guard block；Middle level has excellent weatherability and water vapor barrier property by adding white inorganic filler obstruction ultraviolet and absorbing ultraviolet using ultraviolet absorber.
Description
Technical field
The present invention relates to thin film technique field, and in particular to it is a kind of it is three-layer co-extruded go out polyethylene film and preparation method thereof.
Background technology
Chinese photovoltaic production capacity and market capacity rank first in the world, and market is big unquestionable.Fluorine-containing backboard is remarkable with it
Performance be widely used in photovoltaic module, normal photovoltaic back service phase is 25 years, the occupation rate of market of domestic fluorine-containing backboard
Reach more than 70%, but the retired of a large amount of backboards is faced after 20-30, how to handle and the problem of one huge.
In recovery to fluorine material, there has been no a set of ideal and ripe degraded mode so far in the world.Take each
Kind of processing mode, can not all allow its harmless treatment.Fluorine-containing backboard, if using landfill disposal, can be with the tight of water and soil
Heavily contaminated；If using burning disposal, can volatilize extremely toxic substance, endanger descendants.After meaning the more than ten years, the light of flood tide
Lie prostrate the recovery of the recovery, especially fluorine material of product, the reality that will can not avoid into us and must face, just as currently holding
By the electronic product and automobile product present situation of huge pressure recovery.In addition, though fluorine-contained film in various performances have it is larger
Advantage, but its price is high, additionally there are the problem such as low with EVA bonding forces.Need that to develop a kind of floride-free backboard thin badly now
Film.
The technical problem to be solved in the present invention is：A kind of floride-free backboard film and preparation method thereof is developed, is specifically
Refer to it is a kind of it is three-layer co-extruded go out white weather-resistance polyethylene film and preparation method thereof, the film have it is excellent it is weather-proof, barrier is ultraviolet,
Block water the performances such as trapping, and more crucially the film is easy to recycle after use, environmentally safe.
The content of the invention
It is an object of the invention to provide a kind of floride-free backboard film be it is a kind of it is three-layer co-extruded go out polyethylene film and its preparation
Method, above-mentioned film is weather-proof, barrier is ultraviolet, barrier steam function admirable, and is easily recycled processing, environment-friendly pollution-free.
To achieve the above object, the present invention is realized by following technical proposal：
It is a kind of it is three-layer co-extruded go out weather-resistance polyethylene film, the polyethylene film is from bottom to top successively by internal layer, middle level, outer
Layer three-decker coextrusion forms, and the internal layer and the outer layer are adhesive linkage, and the middle level is UV-blocking layer.
Preferably, the thickness of the internal layer is 2~20 microns, and the thickness in the middle level is 6~60 microns, the outer layer
Thickness is 2~20 microns.
Preferably, the internal layer and the outer layer all include the raw material of following parts by weight：
97~99.95 parts of polyethylene；
0.1~2 part of ultraviolet absorber；
0.05~1 part of antioxidant；
The middle level includes the raw material of following parts by weight：
Preferably, the polyethylene is any in high density polyethylene (HDPE), low density polyethylene (LDPE), LLDPE
One or more, the melt index of polyethylene is 1~30g/10min, 2.16kg, 190 DEG C.
Preferably, the antioxidant is Hinered phenols antioxidant, suffocated amine antioxidant, phosphite ester kind antioxidant, sulphur
One or more in esters antioxidant.
Preferably, the white inorganic filler be titanium dioxide, barium sulfate, lithopone, calcium carbonate, talcum powder, silica,
One or more in calcium oxide, aluminium hydroxide, magnesium hydroxide.
Preferably, the coupling agent is aluminate coupling agent, titanate coupling agent, one kind in silane coupler or more
Kind；The lubricant is the one or more in paraffin, stearic acid and its salt, ethylene bis stearic acid amide.
Preferably, the ultraviolet absorber is salicylic acid esters, benzophenone class, group-substituted acrylonitrile, triazines and hindered amine
One or more in class ultraviolet absorber.
Present invention also offers it is a kind of it is three-layer co-extruded go out weather-resistance polyethylene film preparation method, preparation process is as follows：
1) mixed respectively by high-speed mixer according to the raw material proportioning of internal layer, middle level and outer layer, put into twin-screw and squeeze
Go out machine to be melted, disperseed and extruding pelletization, respectively obtain internal layer, middle level and outer layer polyethylene modified materials；
2) internal layer, middle level and outer layer polyethylene modified materials are put into three lists of three-layer co-extruded slobbering machine or inflation film manufacturing machine respectively
In screw extruder, fusing conveying is carried out at 160~210 DEG C, and converges into casting die head or film-blowing die head, die head temperature is
170~220 DEG C, through die head extrude post-tensioning, cooling and shaping, trimming winding, obtain it is described it is three-layer co-extruded go out weather-resistance polyethylene it is thin
Film.
Preferably, in the step (1), mixing temperature is 10~50 DEG C, and mixing rotating speed is 300~1000rpm, during mixing
Between be 5~40min, extrusion temperature is 120~210 DEG C, and screw speed is 200~600rpm.
The present invention it is three-layer co-extruded go out weather-resistance polyethylene film compared with the fluorine-containing weather-proof film of prior art, have it is following
Beneficial effect：The present invention it is three-layer co-extruded go out white weather-resistance polyethylene film there is three-decker, ectonexine is modified poly- second
Alkene material, there is good adhesive property with materials such as PET, EVA in photovoltaic back, be advantageous to the surface of film and guard block
Strong bond, while there is excellent weatherability and water vapor barrier property；Ultraviolet absorber and inorganic filler are contained in middle level, especially
Titanium dioxide, therefore film can effectively obstruct ultraviolet.In cost, polyethylene is lower than traditional fluororesin price, more
Suit large area to popularize and apply.Importantly, in recycling, polythene material is easier to nothing compared to fluorine material
Pollution is handled and processing is more originally lower.
Brief description of the drawings
Fig. 1 be provided in the embodiment of the present invention it is three-layer co-extruded go out weather-resistance polyethylene membrane structure schematic diagram.
Description of reference numerals：1- polyethylene films；11- internal layers；12- middle levels；13- outer layers.
Embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing and most preferred embodiment pair
The present invention is described further：
Embodiment 1~4 is four kinds of different inner, middle and outer layer film formulations (referring to table 1~3).Used in each embodiment
Raw material is as follows：
(1) polyethylene (PE)：Melt index is 6 (g/10min, 5kg, 190 DEG C) low density polyethylene (LDPE) and melt index
For 22 (g/10min, 5kg, 190 DEG C) LLDPE according to 9:1 ratio mixes.
(2) white inorganic filler：Titanium dioxide trade name：CR-834, supplier are：Ke Meiji pigment Co., Ltd；Powder
Body average grain diameter is 0.2~0.3 micron.
(3) coupling agent：Silane coupler, trade mark KH-560, supplier are：DOW CORNING.
(4) antioxidant：Trade name：Antioxidant -1098, supplier are：BASF Corp. of Germany.
(5) ultraviolet absorber：Trade name：UV-234, supplier are：BASF Corp. of Germany.
(6) lubricant：58 ° of paraffin (granular), supplier are：Oil of SPC.
The inner, middle and outer layer film formulation that embodiment 1~4 uses is as shown in table 1~3.
Internal layer membrane formula (the parts by weight of 1 embodiment of table 1~4：Part)
| Component | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Polyethylene | 99 | 97 | 98 | 98 |
| Antioxidant | 0.5 | 1 | 0.1 | 0.5 |
| Ultraviolet absorber | 0.5 | 2 | 1.9 | 1.5 |
Middle level film formulation (the parts by weight of 2 embodiment of table 1~4：Part)
| Component | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Polyethylene | 70 | 80 | 90 | 60 |
| Titanium dioxide | 20 | 10 | 5 | 30 |
| Coupling agent | 2 | 3 | 1 | 3 |
| Antioxidant | 1 | 1.5 | 0.5 | 1 |
| Ultraviolet absorber | 2 | 1.5 | 1.5 | 1 |
| Lubricant | 5 | 4 | 2 | 5 |
Outer membrane formula (the parts by weight of 3 embodiment of table 1~4：Part)
| Component | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Polyethylene | 97 | 99 | 98 | 98 |
| Antioxidant | 0.5 | 0.1 | 0.3 | 0.4 |
| Ultraviolet absorber | 2.5 | 0.9 | 1.7 | 1.6 |
By the formula in table 1~3 prepare as steps described below it is three-layer co-extruded go out white weather-resistance polyethylene modified film material：
1) by the raw materials such as polyethylene, titanium dioxide, coupling agent, antioxidant, ultraviolet absorber, lubricant respectively according to it is interior, in,
Mixed after outer layer raw material proportioning by high-speed mixer, mixing temperature is 10~50 DEG C, mixes 300~1000rpm of rotating speed, mixing
5~40min of time, to put into double screw extruder and melted, disperseed and extruding pelletization, extrusion temperature is 120~210 DEG C,
Screw speed is 200~600rpm, respectively obtains internal layer, middle level and outer layer polyethylene modified materials；
2) internal layer, middle level and outer layer polyethylene modified materials are put into three lists of three-layer co-extruded slobbering machine or inflation film manufacturing machine respectively
In screw machine extruder, fusing conveying is carried out at 160~210 DEG C, and converges into casting die head or film-blowing die head, die head temperature is
170~220 DEG C, through die head extrude post-tensioning, cooling and shaping, trimming winding, so as to obtain it is described it is three-layer co-extruded go out white it is weather-proof
Polyethylene film.
The temperature and speed conditions of the high mixer of embodiment 1~4 and twin-screw are shown in Table 4~6.
The temperature and rotating speed of the internal layer membrane modified materials high mixer of 4 embodiment of table 1~4 and twin-screw
| Process conditions | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Mix rotating speed (rpm) | 300 | 350 | 400 | 450 |
| Incorporation time (min) | 10 | 8 | 7 | 5 |
| Mixing temperature (DEG C) | 12 | 13 | 12 | 15 |
| Double screw extruder temperature (DEG C) | 170 | 165 | 160 | 165 |
| Double screw extruder rotating speed (rpm) | 300 | 350 | 450 | 400 |
The temperature and rotating speed of the middle level modified film material high mixer of 5 embodiment of table 1~4 and twin-screw
| Process conditions | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Mix rotating speed (rpm) | 500 | 700 | 600 | 900 |
| Incorporation time (min) | 35 | 15 | 20 | 10 |
| Mixing temperature (DEG C) | 25 | 35 | 30 | 45 |
| Double screw extruder temperature (DEG C) | 190 | 185 | 170 | 180 |
| Double screw extruder rotating speed (rpm) | 300 | 350 | 500 | 400 |
The temperature and rotating speed of the outer membrane modified materials high mixer of 6 embodiment of table 1~4 and twin-screw
| Process conditions | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Mix rotating speed (rpm) | 300 | 330 | 380 | 400 |
| Incorporation time (min) | 9 | 7 | 6 | 5 |
| Mixing temperature (DEG C) | 14 | 15 | 12 | 13 |
| Double screw extruder temperature (DEG C) | 165 | 160 | 170 | 175 |
| Double screw extruder rotating speed (rpm) | 400 | 450 | 380 | 350 |
Tested using the method for testing of fluorine-contained film in solar photovoltaic cell backplane film and PET, EVA backing material plate cohesive force
Embodiment 1~4 prepare it is three-layer co-extruded go out the white sample of weather-resistance polyethylene film 1~4 cohesive force.Simultaneously to film sample
Moisture-vapor transmission, ultraviolet irradiation aging post yellowing index are tested, and control sample is conventional 25 microns of individual layer polyvinylidene fluorides
Alkene film, test result are summarized in following table：
The performance test results of the sample 1~4 of table 7
Above-mentioned test result show the preparation of the present invention it is three-layer co-extruded go out white weather-resistance polyethylene film possess and following have
Beneficial effect：
1) internal layer 11 and the adhesive property of outer layer 13 are better than monofilm, with polyethylene terephthalate (PET), ethene-
Acetate ethylene copolymer (EVA) has good adhesive property, is advantageous to the surface strong bond of film and guard block, has more
Big cohesive force；
2) the ultraviolet-resistant layer of middle level 12 can effectively obstruct ultraviolet irradiation, and trilamellar membrane refers to through ultraviolet irradiation aging post yellowing
Number is significantly less than monofilm, therefore trilamellar membrane anti-ultraviolet ageing performance is better than monofilm, is hindered by adding white inorganic filler
Ultraviolet simultaneously absorbs ultraviolet using ultraviolet absorber, has excellent weatherability and water vapor barrier property；
3) because PE has the function that excellent barrier steam, trilamellar membrane water vapour permeability is significantly lower than monofilm.
In summary, it is provided by the invention it is three-layer co-extruded go out weather-resistance polyethylene film in cost, polyethylene is than traditional
Fluororesin price is lower, suits large area to popularize and applies.Furthermore in recycling, polythene material is compared to fluorine-containing material
Material is easier to pollution-free processing and processing is more originally lower.
The preferred embodiment of the present invention is the foregoing is only, is not intended to limit the scope of the invention, every profit
The equivalent transformation made with the present invention, in the scope of patent protection of the present invention.
Claims (10)
1. it is a kind of it is three-layer co-extruded go out weather-resistance polyethylene film, it is characterised in that：The polyethylene film（1）From bottom to top successively by
Internal layer（11）, middle level（12）, outer layer（13）Three-decker coextrusion forms, the internal layer（11）With the outer layer（13）It is viscous
Connect layer, the middle level（12）For UV-blocking layer.
2. it is according to claim 1 it is three-layer co-extruded go out weather-resistance polyethylene film, it is characterised in that：The internal layer（11）Thickness
Spend for 2~20 microns, the middle level（12）Thickness be 6~60 microns, the outer layer（13）Thickness be 2~20 microns.
3. it is according to claim 1 it is three-layer co-extruded go out weather-resistance polyethylene film, it is characterised in that：The internal layer（11）And institute
State outer layer（13）All include the raw material of following parts by weight：
97~99.95 parts of polyethylene；
0.1~2 part of ultraviolet absorber；
0.05~1 part of antioxidant；
The middle level（12）Include the raw material of following parts by weight：
60~90 parts of polyethylene；
5~30 parts of white inorganic filler；
0.05~5 part of coupling agent；
0.05~1 part of antioxidant；
0.05~5 part of ultraviolet absorber；
0.05~5 part of lubricant.
4. it is according to claim 3 it is three-layer co-extruded go out weather-resistance polyethylene film, it is characterised in that：The polyethylene is height
Any one or more in density polyethylene, low density polyethylene (LDPE), LLDPE, the melt index of polyethylene is
1~30 g/10min, 2.16kg, 190 DEG C.
5. it is according to claim 3 it is three-layer co-extruded go out weather-resistance polyethylene film, it is characterised in that：The antioxidant is to be obstructed
One or more in phenolic antioxidant, suffocated amine antioxidant, phosphite ester kind antioxidant, sulphur ester antioxidant.
6. it is according to claim 3 it is three-layer co-extruded go out weather-resistance polyethylene film, it is characterised in that：The white inorganic filler
For one in titanium dioxide, barium sulfate, lithopone, calcium carbonate, talcum powder, silica, calcium oxide, aluminium hydroxide, magnesium hydroxide
Kind is a variety of.
7. it is according to claim 3 it is three-layer co-extruded go out weather-resistance polyethylene film, it is characterised in that：The coupling agent is aluminic acid
One or more in ester coupling agent, titanate coupling agent, silane coupler；The lubricant be paraffin, stearic acid and its salt,
One or more in ethylene bis stearic acid amide.
8. it is according to claim 3 it is three-layer co-extruded go out weather-resistance polyethylene film, it is characterised in that：The ultraviolet absorber is
One or more in salicylic acid esters, benzophenone class, group-substituted acrylonitrile, triazines and hindered amines ultraviolet absorber.
9. described in any one of claim 1~8 it is three-layer co-extruded go out weather-resistance polyethylene film preparation method, it is characterised in that：
Preparation process is as follows：
1）According to internal layer（11）, middle level（12）And outer layer（13）Raw material proportioning respectively by high-speed mixer mix, put into
Double screw extruder melted, is disperseed and extruding pelletization, respectively obtains internal layer, middle level and outer layer polyethylene modified materials；
2）By internal layer（11）, middle level（12）With outer layer（13）PE modified material puts into three-layer co-extruded slobbering machine or inflation film manufacturing machine respectively
Three single-screw machine extruders in, carry out fusing conveying at 160~210 DEG C, and converge into casting die head or film-blowing die head, mould
Head temperature be 170~220 DEG C, through die head extrude post-tensioning, cooling and shaping, trimming winding, obtain it is described it is three-layer co-extruded go out it is weather-proof
Polyethylene film.
10. it is according to claim 9 it is three-layer co-extruded go out weather-resistance polyethylene film, it is characterised in that：The step（1）In,
Mixing temperature is 10~50 DEG C, and mixing rotating speed is 300~1000rpm, and incorporation time is 5~40min, extrusion temperature for 120~
210 DEG C, screw speed is 200~600rpm.
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Cited By (4)
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| CN108276640A (en) * | 2018-01-19 | 2018-07-13 | 四川厚诚新材料有限公司 | One kind is two-way easily to tear curtain coating PE films and preparation method thereof |
| CN112356548A (en) * | 2020-11-11 | 2021-02-12 | 享贺实业发展(上海)有限公司 | High-temperature-resistant electrostatic protection film and preparation process thereof |
| CN115124939A (en) * | 2021-03-24 | 2022-09-30 | 炎洲股份有限公司 | Weather-proof multilayer polyolefin adhesive tape |
| CN117720778A (en) * | 2023-12-27 | 2024-03-19 | 湖北金诺新材料科技有限公司 | Polyolefin composite material for photovoltaic backboard and production process thereof |
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| CN115124939A (en) * | 2021-03-24 | 2022-09-30 | 炎洲股份有限公司 | Weather-proof multilayer polyolefin adhesive tape |
| CN117720778A (en) * | 2023-12-27 | 2024-03-19 | 湖北金诺新材料科技有限公司 | Polyolefin composite material for photovoltaic backboard and production process thereof |
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Application publication date: 20180109 |